金属切削加工毕业设计论文中英文对照资料外文翻译文献

金属磨削有关的英文作文英文回答：Metal cutting is a manufacturing process that uses a cutting tool to remove material from a workpiece. The cutting tool is usually made of a harder material than the workpiece, and it is moved across the workpiece at a high speed. This causes the cutting tool to shear the material from the workpiece, creating a new surface.There are many different types of metal cutting processes, each with its own advantages and disadvantages. The most common type of metal cutting is milling, which uses a rotating cutting tool to remove material from the workpiece. Other types of metal cutting processes include turning, drilling, and sawing.Metal cutting is a versatile process that can be used to create a wide variety of products, from simple parts to complex components. It is a critical process in manyindustries, including the automotive, aerospace, and medical device industries.中文回答：金属切削是一种利用切削刀具从工件上去除材料的制造工艺。

毕业论文中英文资料外文翻译文献附录附录1：英文原文Selection of optimum tool geometry and cutting conditionsusing a surface roughness prediction model for end milling Abstract Influence of tool geometry on the quality of surface produced is well known and hence any attempt to assess the performance of end milling should include the tool geometry. In the present work, experimental studies have been conducted to see the effect of tool geometry (radial rake angle and nose radius) and cutting conditions (cutting speed and feed rate) on the machining performance during end milling of medium carbon steel. The first and second order mathematical models, in terms of machining parameters, were developed for surface roughness prediction using response surface methodology (RSM) on the basis of experimental results. The model selected for optimization has been validated with the Chi square test. The significance of these parameters on surface roughness has been established with analysis of variance. An attempt has also been made to optimize the surface roughness prediction model using genetic algorithms (GA). The GA program gives minimum values of surface roughness and their respective optimal conditions.1 IntroductionEnd milling is one of the most commonly used metal removal operations in industry because of its ability to remove material faster giving reasonably good surface quality. It is used in a variety of manufacturing industries including aerospace and automotive sectors, where quality is an important factor in the production of slots, pockets, precision moulds and dies. Greater attention is given to dimensional accuracy and surface roughness of products by the industry these days. Moreover, surface finish influences mechanical properties such as fatigue behaviour, wear, corrosion, lubrication and electrical conductivity. Thus, measuring and characterizing surface finish can be considered for predicting machining performance.Surface finish resulting from turning operations has traditionally received considerable research attention, where as that of machining processes using multipoint cutters, requires attention by researchers. As these processes involve large number of parameters, it would bedifficult to correlate surface finish with other parameters just by conducting experiments. Modelling helps to understand this kind of process better. Though some amount of work has been carried out to develop surface finish prediction models in the past, the effect of tool geometry has received little attention. However, the radial rake angle has a major affect on the power consumption apart from tangential and radial forces. It also influences chip curling and modifies chip flow direction. In addition to this, researchers [1] have also observed that the nose radius plays a significant role in affecting the surface finish. Therefore the development of a good model should involve the radial rake angle and nose radius along with other relevant factors.Establishment of efficient machining parameters has been a problem that has confronted manufacturing industries for nearly a century, and is still the subject of many studies. Obtaining optimum machining parameters is of great concern in manufacturing industries, where the economy of machining operation plays a key role in the competitive market. In material removal processes, an improper selection of cutting conditions cause surfaces with high roughness and dimensional errors, and it is even possible that dynamic phenomena due to auto excited vibrations may set in [2]. In view of the significant role that the milling operation plays in today’s manufacturing world, there is a need to optimize the machining parameters for this operation. So, an effort has been made in this paper to see the influence of tool geometry(radial rake angle and nose radius) and cutting conditions(cutting speed and feed rate) on the surface finish produced during end milling of medium carbon steel. The experimental results of this work will be used to relate cutting speed, feed rate, radial rake angle and nose radius with the machining response i.e. surface roughness by modelling. The mathematical models thus developed are further utilized to find the optimum process parameters using genetic algorithms.2 ReviewProcess modelling and optimization are two important issues in manufacturing. The manufacturing processes are characterized by a multiplicity of dynamically interacting process variables. Surface finish has been an important factor of machining in predicting performance of any machining operation. In order to develop and optimize a surface roughness model, it is essential to understand the current status of work in this area.Davis et al. [3] have investigated the cutting performance of five end mills having various helix angles. Cutting tests were performed on aluminium alloy L 65 for three milling processes (face, slot and side), in which cutting force, surface roughness and concavity of a machined plane surface were measured. The central composite design was used to decide on the number of experiments to be conducted. The cutting performance of the end mills was assessed usingvariance analysis. The affects of spindle speed, depth of cut and feed rate on the cutting force and surface roughness were studied. The investigation showed that end mills with left hand helix angles are generally less cost effective than those with right hand helix angles. There is no significant difference between up milling and down milling with regard tothe cutting force, although the difference between them regarding the surface roughness was large. Bayoumi et al.[4] have studied the affect of the tool rotation angle, feed rate and cutting speed on the mechanistic process parameters (pressure, friction parameter) for end milling operation with three commercially available workpiece materials, 11 L 17 free machining steel, 62- 35-3 free machining brass and 2024 aluminium using a single fluted HSS milling cutter. It has been found that pressure and friction act on the chip – tool interface decrease with the increase of feed rate and with the decrease of the flow angle, while the cutting speed has a negligible effect on some of the material dependent parameters. Process parameters are summarized into empirical equations as functions of feed rate and tool rotation angle for each work material. However, researchers have not taken into account the effects of cutting conditions and tool geometry simultaneously; besides these studies have not considered the optimization of the cutting process.As end milling is a process which involves a large number f parameters, combined influence of the significant parameters an only be obtained by modelling. Mansour and Abdallaet al. [5] have developed a surface roughness model for the end milling of EN32M (a semi-free cutting carbon case hardening steel with improved merchantability). The mathematical model has been developed in terms of cutting speed, feed rate and axial depth of cut. The affect of these parameters on the surface roughness has been carried out using response surface methodology (RSM). A first order equation covering the speed range of 30–35 m/min and a second order equation covering the speed range of 24–38 m/min were developed under dry machining conditions. Alauddin et al. [6] developed a surface roughness model using RSM for the end milling of 190 BHN steel. First and second order models were constructed along with contour graphs for the selection of the proper combination of cutting speed and feed to increase the metal removal rate without sacrificing surface quality. Hasmi et al. [7] also used the RSM model for assessing the influence of the workpiece material on the surface roughness of the machined surfaces. The model was developed for milling operation by conducting experiments on steel specimens. The expression shows, the relationship between the surface roughness and the various parameters; namely, the cutting speed, feed and depth of cut. The above models have not considered the affect of tool geometry on surface roughness.Since the turn of the century quite a large number of attempts have been made to find optimum values of machining parameters. Uses of many methods have been reported in the literature to solve optimization problems for machining parameters. Jain and Jain [8] have usedneural networks for modeling and optimizing the machining conditions. The results have been validated by comparing the optimized machining conditions obtained using genetic algorithms. Suresh et al. [9] have developed a surface roughness prediction model for turning mild steel using a response surface methodology to produce the factor affects of the individual process parameters. They have also optimized the turning process using the surface roughness prediction model as the objective function. Considering the above, an attempt has been made in this work to develop a surface roughness model with tool geometry and cutting conditions on the basis of experimental results and then optimize it for the selection of these parameters within the given constraints in the end milling operation.3 MethodologyIn this work, mathematical models have been developed using experimental results with the help of response surface methodolog y. The purpose of developing mathematical models relating the machining responses and their factors is to facilitate the optimization of the machining process. This mathematical model has been used as an objective function and the optimization was carried out with the help of genetic algorithms.3.1 Mathematical formulationResponse surface methodology(RSM) is a combination of mathematical and statistical techniques useful for modelling and analyzing the problems in which several independent variables influence a dependent variable or response. The mathematical models commonly used are represented by:where Y is the machining response, ϕ is the response function and S, f , α, r are milling variables and ∈is the error which is normally distributed about the observed response Y with zero mean.The relationship between surface roughness and other independent variables can be represented as follows，where C is a constant and a, b, c and d are exponents.To facilitate the determination of constants and exponents, this mathematical model will have to be linearized by performing a logarithmic transformation as follows:The constants and exponents C, a, b, c and d can be determined by the method of least squares. The first order linear model, developed from the above functional relationship using least squares method, can be represented as follows:where Y1 is the estimated response based on the first-order equation, Y is the measured surface roughness on a logarithmic scale, x0 = 1 (dummy variable), x1, x2, x3 and x4 are logarithmic transformations of cutting speed, feed rate, radial rake angle and nose radiusrespectively, ∈is the experimental error and b values are the estimates of corresponding parameters.The general second order polynomial response is as given below:where Y2 is the estimated response based on the second order equation. The parameters, i.e. b0, b1, b2, b3, b4, b12, b23, b14, etc. are to be estimated by the method of least squares. Validity of the selected model used for optimizing the process parameters has been tested with the help of statistical tests, such as F-test, chi square test, etc. [10].3.2 Optimization using genetic algorithmsMost of the researchers have used traditional optimization techniques for solving machining problems. The traditional methods of optimization and search do not fare well over a broad spectrum of problem domains. Traditional techniques are not efficient when the practical search space is too large. These algorithms are not robust. They are inclined to obtain a local optimal solution. Numerous constraints and number of passes make the machining optimization problem more complicated. So, it was decided to employ genetic algorithms as an optimization technique. GA come under the class of non-traditional search and optimization techniques. GA are different from traditional optimization techniques in the following ways:1.GA work with a coding of the parameter set, not the parameter themselves.2.GA search from a population of points and not a single point.3.GA use information of fitness function, not derivatives or other auxiliary knowledge.4.GA use probabilistic transition rules not deterministic rules.5.It is very likely that the expected GA solution will be the global solution.Genetic algorithms (GA) form a class of adaptive heuristics based on principles derived from the dynamics of natural population genetics. The searching process simulates the natural evaluation of biological creatures and turns out to be an intelligent exploitation of a random search. The mechanics of a GA is simple, involving copying of binary strings. Simplicity of operation and computational efficiency are the two main attractions of the genetic algorithmic approach. The computations are carried out in three stages to get a result in one generation or iteration. The three stages are reproduction, crossover and mutation.In order to use GA to solve any problem, the variable is typically encoded into a string (binary coding) or chromosome structure which represents a possible solution to the given problem. GA begin with a population of strings (individuals) created at random. The fitness of each individual string is evaluated with respect to the given objective function. Then this initial population is operated on by three main operators – reproduction cross over and mutation– to create, hopefully, a better population. Highly fit individuals or solutions are given theopportunity to reproduce by exchanging pieces of their genetic information, in the crossover procedure, with other highly fit individuals. This produces new “offspring” solutions, which share some characteristics taken from both the parents. Mutation is often applied after crossover by altering some genes (i.e. bits) in the offspring. The offspring can either replace the whole population (generational approach) or replace less fit individuals (steady state approach). This new population is further evaluated and tested for some termination criteria. The reproduction-cross over mutation- evaluation cycle is repeated until the termination criteria are met.4 Experimental detailsFor developing models on the basis of experimental data, careful planning of experimentation is essential. The factors considered for experimentation and analysis were cutting speed, feed rate, radial rake angle and nose radius.4.1 Experimental designThe design of experimentation has a major affect on the number of experiments needed. Therefore it is essential to have a well designed set of experiments. The range of values of each factor was set at three different levels, namely low, medium and high as shown in Table 1. Based on this, a total number of 81 experiments (full factorial design), each having a combination of different levels of factors, as shown in Table 2, were carried out.The variables were coded by taking into account the capacity and limiting cutting conditions of the milling machine. The coded values of variables, to be used in Eqs. 3 and 4, were obtained from the following transforming equations:where x1 is the coded value of cutting speed (S), x2 is the coded value of the feed rate ( f ), x3 is the coded value of radial rake angle(α) and x4 is the coded value of nose radius (r).4.2 ExperimentationA high precision ‘Rambaudi Rammatic 500’ CNC milling machine, with a vertical milling head, was used for experimentation. The control system is a CNC FIDIA-12 compact. The cutting tools, used for the experimentation, were solid coated carbide end mill cutters of different radial rake angles and nose radii (WIDIA: DIA20 X FL38 X OAL 102 MM). The tools are coated with TiAlN coating. The hardness, density and transverse rupture strength are 1570 HV 30, 14.5 gm/cm3 and 3800 N/mm2 respectively.AISI 1045 steel specimens of 100×75 mm and 20 mm thickness were used in the present study. All the specimens were annealed, by holding them at 850 ◦C for one hour and then cooling them in a furnace. The chemical analysis of specimens is presented in Table 3. Thehardness of the workpiece material is 170 BHN. All the experiments were carried out at a constant axial depth of cut of 20 mm and a radial depth of cut of 1 mm. The surface roughness (response) was measured with Talysurf-6 at a 0.8 mm cut-off value. An average of four measurements was used as a response value.5 Results and discussionThe influences of cutting speed, feed rate, radial rake angle and nose radius have been assessed by conducting experiments. The variation of machining response with respect to the variables was shown graphically in Fig. 1. It is seen from these figures that of the four dependent parameters, radial rake angle has definite influence on the roughness of the surface machined using an end mill cutter. It is felt that the prominent influence of radial rake angle on the surface generation could be due to the fact that any change in the radial rake angle changes the sharpness of the cutting edge on the periphery, i.e changes the contact length between the chip and workpiece surface. Also it is evident from the plots that as the radial rake angle changes from 4◦to 16◦, the surface roughness decreases and then increases. Therefore, it may be concluded here that the radial rake angle in the range of 4◦to 10◦would give a better surface finish. Figure 1 also shows that the surface roughness decreases first and then increases with the increase in the nose radius. This shows that there is a scope for finding the optimum value of the radial rake angle and nose radius for obtaining the best possible quality of the surface. It was also found that the surface roughness decreases with an increase in cutting speed and increases as feed rate increases. It could also be observed that the surface roughness was a minimum at the 250 m/min speed, 200 mm/min feed rate, 10◦radial rake angle and 0.8 mm nose radius. In order to understand the process better, the experimental results can be used to develop mathematical models using RSM. In this work, a commercially available mathematical software package (MATLAB) was used for the computation of the regression of constants and exponents.5.1 The roughness modelUsing experimental results, empirical equations have been obtained to estimate surface roughness with the significant parameters considered for the experimentation i.e. cutting speed, feed rate, radial rake angle and nose radius. The first order model obtained from the above functional relationship using the RSM method is as follows:The transformed equation of surface roughness prediction is as follows:Equation 10 is derived from Eq. 9 by substituting the coded values of x1, x2, x3 and x4 in termsof ln s, ln f , lnαand ln r. The analysis of the variance (ANOV A) and the F-ratio test have been performed to justify the accuracy of the fit for the mathematical model. Since the calculated values of the F-ratio are less than the standard values of the F-ratio for surface roughness as shown in Table 4, the model is adequate at 99% confidence level to represent the relationship between the machining response and the considered machining parameters of the end milling process.The multiple regression coefficient of the first order model was found to be 0.5839. This shows that the first order model can explain the variation in surface roughness to the extent of 58.39%. As the first order model has low predictability, the second order model has been developed to see whether it can represent better or not.The second order surface roughness model thus developed is as given below:where Y2 is the estimated response of the surface roughness on a logarithmic scale, x1, x2, x3 and x4 are the logarithmic transformation of speed, feed, radial rake angle and nose radius. The data of analysis of variance for the second order surface roughness model is shown in Table 5.Since F cal is greater than F0.01, there is a definite relationship between the response variable and independent variable at 99% confidence level. The multiple regression coefficient of the second order model was found to be 0.9596. On the basis of the multiple regression coefficient (R2), it can be concluded that the second order model was adequate to represent this process. Hence the second order model was considered as an objective function for optimization using genetic algorithms. This second order model was also validated using the chi square test. The calculated chi square value of the model was 0.1493 and them tabulated value at χ2 0.005 is 52.34, as shown in Table 6, which indicates that 99.5% of the variability in surface roughness was explained by this model.Using the second order model, the surface roughness of the components produced by end milling can be estimated with reasonable accuracy. This model would be optimized using genetic algorithms (GA).5.2 The optimization of end millingOptimization of machining parameters not only increases the utility for machining economics, but also the product quality toa great extent. In this context an effort has been made to estimate the optimum tool geometry and machining conditions to produce the best possible surface quality within the constraints.The constrained optimization problem is stated as follows: Minimize Ra using the model given here:where xil and xiu are the upper and lower bounds of process variables xi and x1, x2, x3, x4 are logarithmic transformation of cutting speed, feed, radial rake angle and nose radius.The GA code was developed using MATLAB. This approach makes a binary coding system to represent the variables cutting speed (S), feed rate ( f ), radial rake angle (α) and nose radius (r), i.e. each of these variables is represented by a ten bit binary equivalent, limiting the total string length to 40. It is known as a chromosome. The variables are represented as genes (substrings) in the chromosome. The randomly generated 20 such chromosomes (population size is 20), fulfilling the constraints on the variables, are taken in each generation. The first generation is called the initial population. Once the coding of the variables has been done, then the actual decoded values for the variables are estimated using the following formula: where xi is the actual decoded value of the cutting speed, feed rate, radial rake angle and nose radius, x(L) i is the lower limit and x(U) i is the upper limit and li is the substring length, which is equal to ten in this case.Using the present generation of 20 chromosomes, fitness values are calculated by the following transformation:where f(x) is the fitness function and Ra is the objective function.Out of these 20 fitness values, four are chosen using the roulette-wheel selection scheme. The chromosomes corresponding to these four fitness values are taken as parents. Then the crossover and mutation reproduction methods are applied to generate 20 new chromosomes for the next generation. This processof generating the new population from the old population is called one generation. Many such generations are run till the maximum number of generations is met or the average of four selected fitness values in each generation becomes steady. This ensures that the optimization of all the variables (cutting speed, feed rate, radial rake angle and nose radius) is carried out simultaneously. The final statistics are displayed at the end of all iterations. In order to optimize the present problem using GA, the following parameters have been selected to obtain the best possible solution with the least computational effort: Table 7 shows some of the minimum values of the surface roughness predicted by the GA program with respect to input machining ranges, and Table 8 shows the optimum machining conditions for the corresponding minimum values of the surface roughness shown in Table 7. The MRR given in Table 8 was calculated bywhere f is the table feed (mm/min), aa is the axial depth of cut (20 mm) and ar is the radial depth of cut (1 mm).It can be concluded from the optimization results of the GA program that it is possible toselect a combination of cutting speed, feed rate, radial rake angle and nose radius for achieving the best possible surface finish giving a reasonably good material removal rate. This GA program provides optimum machining conditions for the corresponding given minimum values of the surface roughness. The application of the genetic algorithmic approach to obtain optimal machining conditions will be quite useful at the computer aided process planning (CAPP) stage in the production of high quality goods with tight tolerances by a variety of machining operations, and in the adaptive control of automated machine tools. With the known boundaries of surface roughness and machining conditions, machining could be performed with a relatively high rate of success with the selected machining conditions.6 ConclusionsThe investigations of this study indicate that the parameters cutting speed, feed, radial rake angle and nose radius are the primary actors influencing the surface roughness of medium carbon steel uring end milling. The approach presented in this paper provides n impetus to develop analytical models, based on experimental results for obtaining a surface roughness model using the response surface methodology. By incorporating the cutter geometry in the model, the validity of the model has been enhanced. The optimization of this model using genetic algorithms has resulted in a fairly useful method of obtaining machining parameters in order to obtain the best possible surface quality.中文翻译选择最佳工具，几何形状和切削条件利用表面粗糙度预测模型端铣摘要：刀具几何形状对工件表面质量产生的影响是人所共知的，因此，任何成型面端铣设计应包括刀具的几何形状。

英文及翻译Heat Treating of metalsHeatingFor this discussion, I will take you through the hardening process that I use on a high carbon steel blade, but first a few asides. When you place the steel in the fire it begins to gain heat. The steel will begin to give off visible color just above 900F it will continue to pick up color until it reaches a point where it seems to hang. It is still gaining heat, but it is undergoing an internal transformation from its cold structure into a metastable condition called austenite. This point at which it seems to hang is called decalescence and it represents the bottom of the critical temperature. It usually begins around 1335FIn carbon steel depending on the carbon content. Once it passes through this point, the crystal structure of the steel changes as the ferrite reacts with some of the carbide and begins to pool into austenite. As the temperature increases more of the austenite will begin to form in other places and continue until it reaches a point 10 or 15 degrees above the critical temperature where all of the ferrite should be consumed. At this point the steel should consist of austenite and undissolved carbides. The austenite grains start from a small nucleus and continue to grow until they impinge on other growing grains. The initial grain size is established at this point and if the excess carbide is in large quantities it will maintain this size with little increase, pinned by the carbide.You can see this transformation if you watch the steel carefully and bring the steel up slowly. The Japanese talked about watching the shadows on the blade and quenching when the shadows turned to liquid. If you take the blade out of the fire at this point and watch the colors drop, you will notice a point where the steel will brighten even as it is cooling. On a tapered cross section like a knife blade it will appear to travel up from the edge to the spine of the blade. This is call recalescence and represents the transformation from austenite back to pearlite. After I am done forging a blade, I cycle the blade just above critical and down to dark heat at leastthree times. I watch for these two points to establish critical in my mind and to set up a very fine grain pearlite structure in the steel.After reaching critical temperature, the steel should be fully austenized, but the carbides will continue to dissolve. It may be necessary to soak at temperature to fully dissolve all the carbides. In some steels it may be necessary to continue to raise the temperature for this to be accomplished especially in the presence of alloying elements that retard the transformation.Once the steel is above critical and austenite, it may be quenched and hardened. The structure of the steel can be established by carefully controlling the time it takes the steel drop from critical through the various temperature sensitive points.Transformations on CoolingAnnealing, normalizing, quenchingThe structure and hardness of the steel is established by the rate of cooling from the austenitic condition. If brought down slowly the steel will be annealed and soft. The structure will be mostly ferrite and cementite, carbides. This can be done in a temperature controlled furnace by dropping the temperature through a known rate over a set period of time dependent on the type of steel. Another method is to preheat a heavy bar of low carbon to the same temperature as critical for the steel and bury both of them together in vermiculite. It will slow the cooling rate down so that the blade will still be hot to the touch the next day. For most of the carbon steels this will be enough to anneal the piece.If allowed to air cool it will be normalized, a tougher condition comprised of fine pearlite and carbides. Blades can be prepared for heat treatment in either normalized or annealed states. Another treatment that is particularly effective for workability and for dimensional stability is called sphereodizing. With the steel in a normalized condition you reheat, usually in salt to inhibit oxidization, to a temperature just below lower critical, 1300F and hold for at least an hour. What occurs is that the carbideswill begin to aglomulate or pool into larger more evenly spaced particles in a ferrite matrix. It makes handfinishing much easier.It is important to precondition your blades not only because it helps workability, but also to stress relieve the steel after forging. This will reduce chances of cracking and warping in the quench. It is helpful to think of the forging stage as the beginning of the heat treatment and to pay careful attention to the heats especially in the final forging. My last heats are always at critical. When the blade is finally shaped, I cycle the blade just above critical and down to almost black heat at least three times, cooling between by moving it back and forth in the air gently.HardeningYou have a lot of options when it comes to hardening carbon steel. Even the slightest change in alloy content can make a remarkable difference in the hardening characteristics of the steel, so I would again encourage you to study the steels you will be using.The transformation temperatures and times are described using a chart that shows the Ae1 line, the temperature at which austenite begins to form and the Ms line, the temperature at which martensite starts to form from austenite.The time line at the bottom of the chart is in seconds and side bars give temperature. This is called an "S" curve chart and it is very useful in determining the quench speeds for each steel. The top curve of the "S" is known as the nose of the curve. When quenching from critical, the temperature of the steel must drop below the nose of the curve within a precise amount of time in order for the steel to harden to martensite. In this case, it must get below 900F in under five seconds to form martensite.MarquenchingIf the steel is quenched to below the Ms, martensite will be the predominate structure, however if the blade is quenched to a point slightly above the Ms point, say around 500F and held until it has stabilized at that temperature, the steel has thepromise to form martensite, but will not set up until it drops below Ms. This is called marquenching and is commonly used because it is less stressful particularly in difficult cross sections like we encounter in knife blades. When the blade is removed from the quench it is still above the Ms point and has very unusual properties. It can be easily bent or straightened and is still quite soft. As it cools however, it begins to setup martensite and will harden at room temperature. Again, you need to look at the chart for each steel you will be using because the Mf, or martensite finish point can be well below room temperature on some highly alloyed steels. These steels benefit from sub zero quenching because the colder temperatures are necessary to complete the austenite transformation and to reach the martensite finish. Care must be taken that the blade is not chilled by placing on a cold surface or even by being placed in a breeze or draft. The safest method is to allow it to cool in still air. The blade should be tempered after it has cooled to the point where it can be handled with bare hands.AustemperingIf the steel is quenched from Ae3, critical, to a point between the Ms and the nose of the curve, say 600F and held at temperature for a long time, the austenite will convert to banite. Banite is a much tougher structure than martensite and will maintain the hardness of the steel as tempered to that temperature. This process requires a salt bath and good controls, but makes an really tough spring and is being used by some makers on steels like 52100.QuenchantsThe method of controlling the speed of cooling is the quenchant. The quench rate is determined by how quickly the quenchant can remove the heat from the steel. When a piece of hot steel enters the quenchant the area surrounding the blade absorbs heat from the blade until it is heated itself.金属的热处理加热加热这种讨论,我将以高碳钢为例向你介绍其硬化过程.首先，你把钢铁放在火上加热时。

金属加工专业词中英对照金属加工专业词中英对照Aabrasion n. 磨料,研磨材料,磨蚀剂, a. 磨损的,磨蚀的abrasive belt n. 砂带abrasive belt grinding n. 砂带磨削,用研磨带磨光abrasive cut-off machine n. 砂轮切断机abrasive dressing wheel n. 砂轮修整轮abrasive grain n. 磨料粒度abrasive grit n. 研磨用磨料,铁粒abrasive lapping wheel n. 磨料研磨轮accuracy of position n. 位置精度accuracy to shape n. 形状精度active cutting edge n. 主切削刃adapter flange n. 连接器法兰盘adjointing flanks n. 共轭齿廓align n. 找中(心),找正,对中,对准,找平,调直,校直,调整,调准angle milling cutter n. 角铣刀angular grinding n. 斜面磨削,斜磨法angular milling n. 斜面铣削angular plunge grinding n. 斜向切入磨削angular turning n. 斜面车削arbour n. 刀杆,心轴,柄轴,轴,辊轴attachment n. 附件,附件机构,联结,固接,联结法automatic bar machine n. 棒料自动车床automatic boring machine n. 自动镗床automatic copying lathe n. 自动仿形车床automatic double-head milling machine n. 自动双轴铣床automatic lathe n. 自动车床automatic turret lathe n. 自动转塔车床Bbelt grinding machine n. 砂带磨床bench lathe n. 台式车床bevel n. 斜角，斜面，倾斜，斜切，斜角规，万能角尺，圆锥的，倾斜的，斜边，伞齿轮，锥齿轮bevel gear cutting machine n. 锥齿轮切削机床bevel gear tooth system n. 锥齿轮系，锥齿轮传动系统borehole n. 镗孔，镗出的孔，钻眼boring n. 镗孔，钻孔，穿孔boring fixture n. 镗孔夹具boring machine n. 镗床boring tool n. 镗刀boring, drilling and milling machine n. 镗铣床broaching machine n.拉床，铰孔机，剥孔机broaching tool n. 拉刀broad finishing tool n. 宽刃精切刀，宽刃精车刀，宽刃光切刀CCalibrate vt. 校准〔正〕，刻度，分度，检查〔验〕，定标，标定,使标准化，使符合标准cam contour grinder n. 凸轮仿形磨床carbide tip n. 硬质合金刀片carbide turning tool n. 硬质合金车刀carbide-tipped tool n. 硬质合金刀具cast iron machining n. 铸铁加工，铸铁切削加工centerless cylindrical grinder n. 无心外圆磨床ceramic cutting tool n. 金属陶瓷刀具chamfer n.;vt. 倒角，倒棱chamfered cutting edge n. 倒角刀刃champ v. 焦急champing fixture n. 快换夹具champing jaw n. 快换卡爪chaser n. 螺纹梳刀，梳刀盘，板牙chatter vi.;n. 振动，振荡，震颤，刀振cherry n.;a. 樱桃，鲜红的，樱桃木制的chip n. 切屑，铁屑，刀片，刀头，片，薄片，芯片，基片chip breaker groove radius n. 断屑槽底半径，卷屑槽底半径chip clearance n. 切屑间隙chip cross-sectional area n. 切屑横截面面积chip curl n. 螺旋形切屑chip flow n. 切屑流chip formation n. 切屑形成chip removing process n. 去毛刺加工chip variable n. 切屑变量chuck n. 卡盘，夹盘，卡头，〔电磁〕吸盘，vt. 固定，装卡，夹紧，卡住chucker n. 卡盘车床，卡角车床circular drillling machine n. 圆工作台钻床circular path n. 环路，圆轨迹circular pitch measurement n. 周节测量circumference n. 圆周，周线，周界，周围，四周，范围close-grained a. 细颗粒的coeffecient of tool thrust n. 刀具推力系数coil chip n. 卷状切屑cold circular saw n. 冷圆锯cold saw n. 冷锯column drilling machine n. 圆〔方〕柱立式钻床combined drill and milling cutter n. 复合钻铣床complete traverse grinding n. 横进给磨削，切入磨削computer-controlled machine n. 计算机控制机床，数控机床contact pattern n. 靠模continuous chip n. 连续切屑continuous spiral chip n. 连续螺旋切屑contour n. 轮廓，外形，外貌，轮廓线，回路，网路，电路，等高线，等值线，轮廓等高距 a. 仿形的，靠模的contour grinding n. 仿形磨削，成形磨削contour milling n. 成形铣削，外形铣削，等高走刀曲面仿形法convex milling attachment n. 凸面铣削附件convex turning attachment n. 中凸车削附件，凸面车削附件coolant lubricant n. 冷却润滑剂coolant lubricant emulsion n. 冷却润滑乳液〔剂〕copy n. 样板，仿形，靠模工作法，拷贝复制品，v. 复制,模仿,抄录copy grinding n. 仿形磨床copy-mill n. 仿形铣copying turret lathe n. 仿形转塔车床corner n. 角,弯〔管〕头,弯管counterbore n. 埋头孔,沉孔,锥口孔,平底扩孔钻,平底锪钻, n.;vt. 扩孔，锪孔，镗孔，镗阶梯孔crankshaft grinding machine n. 曲轴磨床crankshaft turning lathe n. 曲轴车床creep feed grinding n. 缓进给磨削cross milling n. 横向铣削curly chip n. 卷状切屑，螺旋形切屑，切屑螺旋cut v.;n. 切削〔割〕，口，片，断，断开，削减，减少，断面，剖面，相交，凹槽cut off n. 切断〔开，去〕，关闭，停车，停止，断开装置，断流器，挡板，截止，截流cut teeeth n. 铣齿cut-off grinding n. 砂轮截断，砂轮切割cutter n. 刀具，切削工具，截断器，切断器，切断机cutting n. 切削，切片，切割，切屑，金属屑，截槽cutting edge profile n. 切削刃轮廓〔外形，断面〕，切削刃角度cutting force n. 切削力cutting lip n. 切削刃，刀刃，钻唇，钻刃cutting operation n. 切削加工，切削操作，切削作业cutting rate n. 切削效率，切削速率cutting tool n. 刀具，切削工具，刃具cycle n. 周期，周，循环，一个操作过程，轮转，自行车cylindrical grinder n. 外圆磨床Ddamage n.;vt. 损坏〔害，伤，耗，失〕，破坏，事故，故障，伤害，危害deep-hole drilling n.深孔钻削deep-hole milling n. 深孔铣削design n. 设计，计算，计划，方案，设计书，图纸die-sinking n. 凹模dimension n. 尺寸，尺度，维度，量纲，因次direction of the feed motion n. 进给方向，进刀方向discontinuous chip n. 间断切屑distance n. 距离，间隔〔隙〕，长度，vt. 隔开double-column planer-miller n. 双柱龙门铣床dress v. 修饰，修整，平整，整理，清理，装饰，调制，准备，打磨，磨光，压平，轿直，清洗，清理，分级drilling n. 钻头，钻床，穿孔器，凿岩机，v. 钻孔，打孔，钻井，钻探drilling machine n. 钻床，钻机，钻孔机，打眼机drilling tool n. 钻孔〔削，井，眼〕工具Eedge point n. 刀口，刀刃efficiency n. 效率，效能，性能，功率，产量，实力，经济性，有〔功，实〕效end mill n. 立铣刀external grinding n. 外圆磨削Fface n. 表面，外观，工作面，表盘，屏，幕v. 面向，朝向，表面加工，把表面弄平face grinding machine n. 平面磨床face milling machine n. 端面磨床feed force n. 进给力feed motion n. 进给运动fine adjustment n. 精调，细调，微调fine boring n. 精密镗孔finish v.;n. 精加工，抛光，修整，表面粗糙度，完工，最后加工，最后阶段，涂层，涂料finish-cutting n. 精加工，最终切削fixture n. 夹具，夹紧装置，配件，零件，定位器，支架form n. 型式，类型，摸板，模型，形成，产生，成形，表格v. 形〔组，构〕成，产生，作出，成形，造型form-turn n. 成形车削free-cutting n. 自由切削，无支承切削，高速切削Ggap n. 间隔，间隙，距离，范围，区间，缺口，开口火花隙，vt. 使产生裂缝vi. 豁开gear cutting machine n. 齿轮加工机床，切齿机gear generating grinder n. 磨齿机gear hob n. 齿轮滚刀grinding cutter n. 磨具grinding force n. 磨削力grinding machine n. 磨床grinding wheel diameter n. 砂轮直径grinding wheel width n. 砂轮宽度groove n. 槽，切口，排屑槽，空心槽，坡口，vt. 切〔开，铣〕槽groove milling n.铣槽Hheadstock spindle n. 床头箱主轴，主轴箱主轴，头架轴helical tooth system n. 螺旋齿轮传动装置high precision lathe n. 高精度车床high-speed n. 高速high-speed machining n. 高速加工hob n. 齿轮滚刀，滚刀，螺旋铣刀，v. 滚铣，滚齿，滚削horsepower n. 马力hobbing machine n. 滚齿机，螺旋铣床，挤压制模压力机，反应阴模机hole n. 孔，洞，坑，槽，空穴，孔道，管道，v. 钻〔穿，冲，开〕孔，打洞hone n. vt. 磨石，油石，珩磨头，磨孔器，珩磨，honing machine n. 珩磨机，珩床，搪磨床，磨孔机，磨气缸机Iinclination n. 倾斜，斜度，倾角，斜角〔坡〕，弯曲，偏〔差，角〕转increment n. 增量，增加，增〔大〕长indexing table automatic n. 自动分度工作台infeed grinding n. 切入式磨削installation n. 装置，设备，台，站，安装，设置internal grinding n. 内圆磨削involute hob n. 渐开线滚刀Jjig boring machine n. 坐标镗床Kkeyway cutting n. 键槽切削加工knurling tool n. 滚花刀具，压花刀具，滚花刀Llaedscrew machine n. 丝杠加工机床lap grinding n. 研磨lapping n. 研磨，抛光，精研，搭接，擦准lathe n. 车床lathe dog n. 车床轧头，卡箍，鸡心夹头，离心夹头，制动爪，车床挡块lathe tool n. 车刀level n. 水平，水准，水平线，水平仪，水准仪，电平，能级，程度，强度，a. 水平的，相等的，均匀的，平稳的loading time n. 装载料时间，荷重时间，充填时间，充气时间lock n. 锁，栓，闸，闭锁装置，锁型，同步，牵引，v. 闭锁，关闭，卡住，固定，定位，制动刹住longitudinal grinding n. 纵磨low capacity machine n. 小功率机床〔机器〕Mmachine axis n. 机床中心线machine table n. 机床工作台machine tool n. 机床，工作母机machining n. 机械加工，切削加工machining (or cutting) variable n. 加工（或切削）变量machining allowance n. 机械加工余量machining cycle n. 加工循环machining of metals n. 金属切削加工，金属加工magazine automatic n. 自动化仓库，自动化料斗，自动存贮送料装置manufacture n. 制造者，生产者，厂商，产品，制造material removing rate n. 材料去除率metal cutting n. 金属切削metal-cutting technology n. 金属切削工艺学，金属切削工艺〔技术〕metal-cutting tool n. 金属切削刀具，金属切削工具micrometer adjustment n. 微调milling n. 铣削，磨碎，磨整，选矿milling feed n. 铣削进给，铣削走刀量，铣削走刀机构milling machine n. 铣床milling spindle n. 铣床主轴milling tool n. 铣削刀具，铣削工具mount v. 固定，安装，装配，装置，架设，n. 固定件，支架，座，装置，机构mounting n. 安装，装配，固定，机架，框架，装置mounting fixture n. 安装夹具，固定夹具NNose n. 鼻子，端，前端，凸头，刀尖，机头，突出部分，伸出部分number of revolutions n. 转数numerical control n. 数字控制numerically controlled lathe n. 数控车床Ooblique grinding n. 斜切式磨床operate v. 操纵，控制，运行，工作，动作，运算operating cycle n. 工作循环operation n. 运转，操作，控制，工作，作业，运算，计算operational instruction n. 操作说明书，操作说明operational safety n. 操作安全性，使用可靠性oscillating type abrasive cutting machine n. 摆动式砂轮切割机oscillation n. 振动，振荡，摆动，颤振，振幅out-cut milling n. 切口铣削oxide ceramics n. 氧化物陶瓷oxide-ceramic cutting tool n. 陶瓷刀具Pperformance n. 实行，执行，完成，特性，性能，成品，制作品，行为，动作，生产率，效率peripheral grinding n. 圆周磨削peripheral speed n. 圆周速度，周速，边缘速度perpendicular a. 垂直的，正交的，成直角的n. 垂直，正交，竖直，垂线，垂直面physical entity n. 实体，实物pitch n. 齿距，节距，铆间距，螺距，极距，辊距，坡度，高跨比，俯仰角pitch circle n. 节圆plain (or cylindrical) milling machine n. 普通（或圆柱形）铣床plain grinding n. 平面磨削plain turning n. 平面车床plane n. 平面，面，投影，刨，水平，程度，阶段，飞机 a.平的v. 弄平，整平，刨，飞行plane milling n. 平面铣削plane-mill n. 平面铣刀，平面铣床plunge mill n. 模向进给滚轧机plunge-cut n. 切入式磨削，横向进给磨削，全面进刀法，全面进给法plunge-cut thread grinder n. 切入式螺纹磨床plunge-grinding n. 切入式磨削point n. 点，尖端，刀尖，针尖，指针，交点，要点，论点，特点v. 指，面向，瞄准，对准，表明，弄尖，强调power n. 功率，效率，能〔容，力〕量，动力，电源，能源v. 驱〔拖，带，发〕动，给...以动力power hacksaw n. 机动弓锯〔钢锯〕precision boring n. 精镗precision boring machine n. 精密镗床precision machining n. 精密机械加工pressure angle n. 压力角primary cutting edge n. 主切削刃principal feed motion n. 主进给运动，主进刀运动production method s n. 生产方法[式]profile n. 轮廓，形面，剖面，侧面图，分布图。

中文部分切削加工新概念现今的刀具公司再也不能只是制造和销售刀具，为了成功，他们必须与全球化制造趋势保持一致，通过提高效率、同客户合作来降低成本。

在这个近乎瞬间的全球竞争的后NAFTA、后WTO时代，全世界的公司正对相同感觉作出更快、更轻、更便宜的反应。

换句话说，他们制造的产品和零件包含能在高速下运转，由于成本的压力，最好、更轻而且要制造更便宜。

取得这些目标的一个最佳途径是通过发展和应用新材料，但这些新的和改进的材料通常都难以加工。

这种商业上的动力和技术上的困难的组合在汽车和航空工业尤其突出，并已成为有见识的刀具公司研发部门的首要驱动力。

例如，拿球墨铸铁来说，它已成为发动机零件和其它汽车、农用设备和机床工业上的零件的日益见的材料。

这种合金提供较低的生产成本和良好的机械性能的组合。

他们比钢材便宜，而比铸铁有更高的强度和韧性。

但同时球墨铸铁非常耐磨，有快速磨坏刀具材料的倾向。

这种耐磨性很大程度上受珠光体含量影响。

某一已知球墨铸铁的珠光体含量越高，它的耐磨性越好，而且它的可加工性越差。

另外，球墨铸铁的多孔性导致断续切削，这更加降低寿命。

可以预计，高硬度和高耐磨的切削材质需考虑球墨铸铁的高耐磨性。

并且事实上材质包含极硬的TiC（碳化钛）或TiCN（碳氮化钛）的厚涂层在切削速度每分钟300米时加工球墨铸铁被证明通常是有效的。

但是随着切削速度的增加，切屑/刀具结合面的温度也在增加。

当发生这样的情况，TiC涂层倾向于和铁发生化学反应并软化，更多的压力作用在抗月牙洼磨损的涂层上。

在这些条件下，希望有一种化学稳定性更好的涂层，如Al2O3（虽然在较低的速度下不如TiC硬或耐磨）。

化学稳定性比耐磨性更成为一个重要的表现性能分界的因素，速度和温度取决于被加工球墨铸铁的晶粒结构和性能。

但是通常厚涂层的TiC或TiCN和仅有氧化物的较薄涂层是针对球墨铸铁应用的，因为今天大部分这类被加工材料的切削速度在每分钟150到335米之间。

1英文文献翻译1.1Automatic wire straightening and cutting machineReinforcing steel cutting machine is a kind of shear of reinforced by the use of a tool. The general automatic steel cutting machine, and automatic steel bar cutting machine of. It is one of the essential equipment in steel processing, it is mainly used for buildings, bridges, tunnels, hydropower, large-scale water conservancy projects of steel cutting. Reinforcing steel cutting machine and other cutting equipment, has the advantages of light weight, low energy consumption, reliable work, high efficiency, so in recent years has been gradually mechanical processing and small rolling mill is widely used, in all areas of national economic construction play an important role.The general automatic steel cutting machine, and automatic steel bar cutting machine of. Full automatic electric cutting machine is also called the electric energy is converted to kinetic energy by the motor control cutter incision, to achieve the effect of shear reinforcement. The semi-automatic is artificial control of incision, and shear reinforcement operation. But there is more to belong to the hydraulic steel bar cutting machine hydraulic steel bar cutting machine is divided into a charging and portable two categories.Steel bar cutting machineApplicable to all types of ordinary carbon steel construction, hot rolling bar, screw steel, flat steel, square steel cutting. Cut round: ( Q235-A ) diameter: (Φ 6-Φ 40) mm cut flat maximum specifications: (70x15) mm cut square: (Q235-A) the maximum specifications: (32x32) mm cut angle maximum specifications: (50x50) mmDomestic and international comparison: because the cutting machine cutting machine technical content is low, easy imitation, profit is not high, so the manufacturer for decades to maintain the basic present situation, development israpid, with foreign counterparts in particular has following several aspects the gap.1) foreign cutting machine of the eccentric shaft of large eccentricity, such as vertical cutting machine eccentric distance 24mm, and general domestic17mm. seemingly saves material, some small gear structure, but to give the user to bring trouble, not easy to management. Because the cut the expected cut small material, not for a knife pad is for the blade, sometimes also need to change perspective.2) foreign cutting machine frame is welded steel structure, precision machining parts and components, roughness especially heat treatment technology is excellent, so that the cutter under overload load, fatigue failure, wear etc. more than domestic machine.3) domestic cutter blade design is reasonable, the single screw bolt is fixed, the blade thickness is thin enough, type 40and type 50blade thickness is 17mm; and abroad are double bolt,25～ 27mm thickness, so foreign blade in stress and life are more domestic excellent comprehensive performance.4) domestic cut machine cut fewer times per minute. Home is generally 28 to31 times, foreign higher than 15~ 20 times,30times the highest high, high work efficiency. 5) foreign models generally use the semi-open structure, gear, bearing grease, crank shaft, connecting rod, cutting knife holder, swivel by manual plus dilute oil lubrication. The model structure has fully open, fully closed, half open3, lubrication methods are concentration of dilute oil lubrication and splash lubrication of 2. 6) domestic cutting machine appearance quality, machine performance is unsatisfactory; foreign manufacturers generally is the scale of production, make investment in technology and equipment inInto, automated production level is higher, form a complete set of quality assurance and processing system. Especially on the appearance quality is refine on, cover one-time stamping molding, paint the paint spraying processing, color collocation is scientific and reasonable, the appearance can not see where the weld, burrs, sharp corners, the bright and clean appearance. And some domestic manufacturers although production history is long, but not one of the formationof scale, and aging equipment, process, production technology experience to spellphysical power, always make a few years, so the appearance of rough, perceptionof poor quality.Reinforcing steel cutting machine safety requirements for operation(1) to the surface of the work material feeding and cutter lower level, the lengthof the working platform can be processed according to material length.(2) before, should check and confirm the cutter without crack, carriage bolts, protective cover firm. And then hand belt pulley, gear meshing clearance check,adjust the cutting clearance. (3) after the start, should first air operation,check the transmission part and the bearing can be normal operation, operation.(4) machinery does not reach the normal speed, not cutting. When cutting materials, should be used in the next part, cutter, hold the reinforced alignmentedge quickly put, the operator should stand in a fixed blade side press bar, shouldprevent the reinforced end pop. Prohibit the use of both hands in blade on bothsides hold reinforced leaned feeding.(5) may not be cutting diameter and strength more than machinery nameplate provisions and a red-hot steel reinforced. A cut of a plurality of steel, the totalcross-sectional area should be within the specified scope. (6) cutting low alloysteel, should be replaced with high hardness cutting knife, cutting diameter shallbe in accordance with the provisions of machinery nameplate.(7) cut short when feeding, the distance between the hand and the knife shouldbe maintained above 150mm, such as holding end is less than 400mm, should adoptthe casing or fixture to be reinforced short head down or clip. (8) operation,prohibit the use of hand direct clear cutting knife near the end and sundries.Steel swing around and cutter may not stay around, non operators. (9) found thatwhen the machine is not operating properly, abnormal noise or the cutter deflection,should immediately stop machine overhaul.(8) operation, prohibit the use of hand direct clear cutting knife near the endand sundries. Steel swing around and cutter may not stay around, non operators.found that when the machine is not operating properly, abnormal noise or the cutter deflection, should immediately stop machine overhaul.(10) after the operation, the power should be cut off, with the steel brush to clean the sundries cutter machine, cleaning and lubricating.(11) hydraulic transmission type cutting machine operation before, should check and confirm the hydraulic oil and the rotation direction of the motor meets the requirements. After starting, no-load operation, loosen oil drain valve, hydraulic cylinder air, can be cut tendons. (12) manual hydraulic cutting machine before use, should the oil drain valve in a clockwise direction, after the cutting, should immediately counterclockwise unscrewing. During the operation, the hand should besteady and cutting machine, and wear insulated gloves.This article introduces a kind of architectural lie type steel cutting machines. Its operating principles are: It use electric motors level triangle belt transmission and secondary gear transmission to slowdown. Then, it drives the crank rotate, The crank connected to slide block and moving blades in the slippery way make the back and forth straight line sport, makes the moving blades and the fixed blade shear and cut steel.According to the working environment choice thetype of electric motors,using horizontal installation, protection of the electrical, squirrel-cage three-phase asynchronous motor.momentum, and the scope of power, transmission efOption three slowdown,first level belt slowdown, followed by the secondary gear deceleration. firstthe introduction of automated, because it has a buffer, absorb shock and operate smoothly, small noise, and can protect the over loading. Then introduce a secondary gear deceleration slowdown, because gear transmission can be used to transmit arbitrary space between the two axis movement andficient transmission accurately, long using life, such as safe and reliable character. Power output by electric motors through slow down transmission system to import power to the executive body.As the system make rotation movement, The steel cutting machine needs the back and forth straight line sport ,in order to achieve this transformation, we can use c slider-crank institutions or gear and rack. I decided to consider realistic machinery.conditions using slider-crank as the executing.1.2毕业设计中文文献钢筋切断机是一种剪切钢筋所使用的一种工具。

金属切削磨削、钻削、镗削和齿轮滚洗法机床生产厂家一直在为顾客寻找更快、更高效的切削时期、更快的工作速度、更低的循环次数、以及增加金属切削精度的方法。

机床生产者花了许多他们的费用在高速加工设备上去提高他们的生产效益，比如在IMTS 2000上你将会看到最新的磨削、钻削、樘削和齿轮滚洗方法。

更快、更可靠的心轴和和提高机床的控制是提高加工产量和生产力的主要因素。

“更快的心轴，提高生产力，是在一个坚果壳里”Chris Hetzer说，Hrafton,WI工程部代理总工程师，也就是说未来将出现新的心轴并且在IMTS上会有多轴。

Hetzer说：“你不得不正确的去做心轴的设计，并且心轴不仅要在高速下操作，而且它也要具备能够随着生产的要求增加速度的特性，这也意味着动态的心轴要能确保能在不同的速度、不同的载荷，不同的刀具下能正常工作；这样，心轴不得不具备一定的硬度，同时他也要具备一定的韧性以便他能够经得起摩擦、不同程度的撞击，包括刀具”一个可调心轴所能套的齿轮内孔直径范围比较大，即一个“可调心轴”能适用于多个内孔直径不同的齿轮，代替多根普通心轴，能减少心轴的磨损，所需心轴长度相对比较短，省材。

心轴属于斜楔夹紧装置，用于机械加工中的产品检测作辅助装置，主要作为齿轮测量时的支承件。

一套“可调径心轴”可代替多跟规格不同的现有“普通心轴”的作用，所以“可调径心轴”比现有的“普通心轴”更有使用价值和市场价值。

Hetzer记录，Gilman 的心轴设计需要用FEA确保单元与单元之间的粘合力，其实这是生产一个快速运转心轴过程中的一小部分，我们真正想要寻找这些高速的心轴就是在整个生产过程中它的稳定性，比如说，一个170mm的心轴在30KW的情况下，它的转速是24000rpm，我们的顾客想要他们的第一个心轴是这样，第二个是这样，第三个是这样，第四个也是这样……Hetzer说，真正要确保每个单元之间的粘合力是非常困难的，它需要广大的FEA分析，这就包括了许多东西，例如生产公差、轴承质量，但是剩下的是你的设计和分析。

外文资料CUTTING TECHNOLOGYIntroduction of MachiningMachining as a shape-producing method is the most universally used and the most important of all manufacturing processes. Machining is a shape-producing process in which a power-driven device causes material to be removed in chip form. Most machining is done with equipment that supports both the work piece and cutting tool although in some cases portable equipment is used with unsupported workpiece.Low setup cost for small Quantities. Machining has two applications in manufacturing. For casting, forging, and press working, each specific shape to be produced, even one part, nearly always has a high tooling cost. The shapes that may he produced by welding depend to a large degree on the shapes of raw material that are available. By making use of generally high cost equipment but without special tooling, it is possible, by machining; to start with nearly any form of raw material, so tong as the exterior dimensions are great enough, and produce any desired shape from any material. Therefore .machining is usually the preferred method for producing one or a few parts, even when the design of the part would logically lead to casting, forging or press working if a high quantity were to be produced.Close accuracies, good finishes. The second application for machining is based on the high accuracies and surface finishes possible. Many of the parts machined in low quantities would be produced with lower but acceptable tolerances if produced in high quantities by some other process. On the other hand, many parts are given their general shapes by some high quantity deformation process and machined only on selected surfaces where high accuracies are needed. Internal threads, for example, are seldom produced by any means other than machining and small holes in press worked parts may be machined following the press working operations.Primary Cutting ParametersThe basic tool-work relationship in cutting is adequately described by means of four factors: tool geometry, cutting speed, feed, and depth of cut.The cutting tool must be made of an appropriate material; it must be strong, tough, hard, and wear resistant. The tool s geometry characterized by planes and angles, must be correct for each cutting operation. Cutting speed is the rate at which the work surface passes by the cutting edge. It may be expressed in feet per minute.For efficient machining the cutting speed must be of a magnitude appropriate to the particular work-tool combination. In general, the harder the work material, the slower the speed.Feed is the rate at which the cutting tool advances into the workpiece. "Where the workpiece or the tool rotates, feed is measured in inches per revolution. When the tool or the work reciprocates, feed is measured in inches per stroke, Generally, feed varies inversely with cutting speed for otherwise similar conditions.The depth of cut, measured inches is the distance the tool is set into the work. It is the width of the chip in turning or the thickness of the chip in a rectilinear cut. In roughing operations, the depth of cut can be larger than for finishing operations.The Effect of Changes in Cutting Parameters on Cutting TemperaturesIn metal cutting operations heat is generated in the primary and secondary deformation zones and these results in a complex temperature distribution throughout the tool, workpiece and chip. A typical set of isotherms is shown in figure where it can be seen that, as could be expected, there is a very large temperature gradient throughout the width of the chip as the workpiece material is sheared in primary deformation and there is a further large temperature in the chip adjacent to the face as the chip is sheared in secondary deformation. This leads to a maximum cutting temperature a short distance up the face from the cutting edge and a small distance into the chip.Since virtually all the work done in metal cutting is converted into heat, it could be expected that factors which increase the power consumed per unit volume of metal removed will increase the cutting temperature. Thus an increase in the rake angle, all otherparameters remaining constant, will reduce the power per unit volume of metal removed and the cutting temperatures will reduce. When considering increase in unreformed chip thickness and cutting speed the situation is more complex. An increase in undeformed chip thickness tends to be a scale effect where the amounts of heat which pass to the workpiece, the tool and chip remain in fixed proportions and the changes in cutting temperature tend to be small. Increase in cutting speed; however, reduce the amount of heat which passes into the workpiece and this increase the temperature rise of the chip m primary deformation. Further, the secondary deformation zone tends to be smaller and this has the effect of increasing the temperatures in this zone. Other changes in cutting parameters have virtually no effect on the power consumed per unit volume of metal removed and consequently have virtually no effect on the cutting temperatures. Since it has been shown that even small changes in cutting temperature have a significant effect on tool wear rate it is appropriate to indicate how cutting temperatures can be assessed from cutting data.The most direct and accurate method for measuring temperatures in high -speed-steel cutting tools is that of Wright &. Trent which also yields detailed information on temperature distributions in high-speed-steel cutting tools. The technique is based on the metallographic examination of sectioned high-speed-steel tools which relates microstructure changes to thermal history.Trent has described measurements of cutting temperatures and temperature distributions for high-speed-steel tools when machining a wide range of workpiece materials. This technique has been further developed by using scanning electron microscopy to study fine-scale microstructure changes arising from over tempering of the tempered martens tic matrix of various high-speed-steels. This technique has also been used to study temperature distributions in both high-speed -steel single point turning tools and twist drills.Wears of Cutting ToolDiscounting brittle fracture and edge chipping, which have already been dealt with, tool wear is basically of three types. Flank wear, crater wear, and notch wear. Flank wear occurs on both the major and the minor cutting edges. On the major cutting edge, which is responsible for bulk metal removal, these results in increased cutting forces and highertemperatures which if left unchecked can lead to vibration of the tool and workpiece and a condition where efficient cutting can no longer take place. On the minor cutting edge, which determines workpiece size and surface finish, flank wear can result in an oversized product which has poor surface finish. Under most practical cutting conditions, the tool will fail due to major flank wear before the minor flank wear is sufficiently large to result in the manufacture of an unacceptable component.Because of the stress distribution on the tool face, the frictional stress in the region of sliding contact between the chip and the face is at a maximum at the start of the sliding contact region and is zero at the end. Thus abrasive wear takes place in this region with more wear taking place adjacent to the seizure region than adjacent to the point at which the chip loses contact with the face. This result in localized pitting of the tool face some distance up the face which is usually referred to as catering and which normally has a section in the form of a circular arc. In many respects and for practical cutting conditions, crater wear is a less severe form of wear than flank wear and consequently flank wear is a more common tool failure criterion. However, since various authors have shown that the temperature on the face increases more rapidly with increasing cutting speed than the temperature on the flank, and since the rate of wear of any type is significantly affected by changes in temperature, crater wear usually occurs at high cutting speeds.At the end of the major flank wear land where the tool is in contact with the uncut workpiece surface it is common for the flank wear to be more pronounced than along the rest of the wear land. This is because of localised effects such as a hardened layer on the uncut surface caused by work hardening introduced by a previous cut, an oxide scale, and localised high temperatures resulting from the edge effect. This localised wear is usually referred to as notch wear and occasionally is very severe. Although the presence of the notch will not significantly affect the cutting properties of the tool, the notch is often relatively deep and if cutting were to continue there would be a good chance that the tool would fracture.If any form of progressive wear allowed to continue, dramatically and the tool would fail catastrophically, i. e. the tool would be no longer capable of cutting and, at best, theworkpiece would be scrapped whilst, at worst, damage could be caused to the machine tool. For carbide cutting tools and for all types of wear, the tool is said to have reached the end of its useful life long before the onset of catastrophic failure. For high-speed-steel cutting tools, however, where the wear tends to be non-uniform it has been found that the most meaningful and reproducible results can be obtained when the wear is allowed to continue to the onset of catastrophic failure even though, of course, in practice a cutting time far less than that to failure would be used. The onset of catastrophic failure is characterized by one of several phenomena, the most common being a sudden increase in cutting force, the presence of burnished rings on the workpiece, and a significant increase in the noise level.Mechanism of Surface Finish ProductionThere are basically five mechanisms which contribute to the production of a surface which have been machined. These are:1、The basic geometry of the cutting process. In, for example, single point turning the tool will advance a constant distance axially per revolution of the workpiecc and the resultant surface will have on it, when viewed perpendicularly to the direction of tool feed motion, a series of cusps which will have a basic form which replicates the shape of the tool in cut.2、The efficiency of the cutting operation. It has already been mentioned that cutting with unstable built-up-edges will produce a surface which contains hard built-up-edge fragments which will result in a degradation of the surface finish. It can also be demonstrated that cutting under adverse conditions such as apply when using large feeds small rake angles and low cutting speeds, besides producing conditions which lead to unstable built-up-edge production, the cutting process itself can become unstable and instead of continuous shear occurring in the shear zone, tearing takes place, discontinuous chips of uneven thickness are produced, and the resultant surface is poor. This situation is particularly noticeable when machining very ductile materials such as copper and aluminum.3、The stability of the machine tool. Under some combinations of cutting conditions; workpiece size, method of clamping ,and cutting tool rigidity relative to the machine tool structure, instability can be set up in the tool which causes it to vibrate. Under someconditions this vibration will reach and maintain steady amplitude whilst under other conditions the vibration will built up and unless cutting is stopped considerable damage to both the cutting tool and workpiece may occur. This phenomenon is known as chatter and in axial turning is characterized by long pitch helical bands on the workpiece surface and short pitch undulations on the transient machined surface. M4、The effectiveness of removing swarf. In discontinuous chip production machining, such as milling or turning of brittle materials, it is expected that the chip (swarf) will leave the cutting zone either under gravity or with the assistance of a jet of cutting fluid and that they will not influence the cut surface in any way. However, when continuous chip production is evident, unless steps are taken to control the swarf it is likely that it will impinge on the cut surface and mark it. Inevitably, this marking besides looking5、The effective clearance angle on the cutting tool. For certain geometries of minor cutting edge relief and clearance angles it is possible to cut on the major cutting edge and burnish on the minor cutting edge. This can produce a good surface finish but, of course, it is strictly a combination of metal cutting and metal forming and is not to be recommended as a practical cutting method. However, due to cutting tool wear, these conditions occasionally arise and lead to a marked change in the surface characteristics.Limits and TolerancesMachine parts are manufactured so they are interchangeable. In other words, each part of a machine or mechanism is made to a certain size and shape so will fit into any other machine or mechanism of the same type. To make the part interchangeable, each individual part must be made to a size that will fit the mating part in the correct way. It is not only impossible, but also impractical to make many parts to an exact size. This is because machines are not perfect, and the tools become worn. A slight variation from the exact size is always allowed. The amount of this variation depends on the kind of part being manufactured. For examples part might be made 6 in. long with a variation allowed of 0.003 (three-thousandths) in. above and below this size. Therefore, the part could be 5.997 to 6.003 in. and still be the correct size. These are known as the limits. The difference between upper and lower limits is called the tolerance.A tolerance is the total permissible variation in the size of a part.The basic size is that size from which limits of size arc derived by the application of allowances and tolerances.Sometimes the limit is allowed in only one direction. This is known as unilateral tolerance.Unilateral tolerancing is a system of dimensioning where the tolerance (that is variation) is shown in only one direction from the nominal size. Unilateral tolerancing allow the changing of tolerance on a hole or shaft without seriously affecting the fit.When the tolerance is in both directions from the basic size it is known as a bilateral tolerance (plus and minus).Bilateral tolerancing is a system of dimensioning where the tolerance (that is variation) is split and is shown on either side of the nominal size. Limit dimensioning is a system of dimensioning where only the maximum and minimum dimensions arc shown. Thus, the tolerance is the difference between these two dimensions.Surface Finishing and Dimensional ControlProducts that have been completed to their proper shape and size frequently require some type of surface finishing to enable them to satisfactorily fulfill their function. In some cases, it is necessary to improve the physical properties of the surface material for resistance to penetration or abrasion. In many manufacturing processes, the product surface is left with dirt .chips, grease, or other harmful material upon it. Assemblies that are made of different materials, or from the same materials processed in different manners, may require some special surface treatment to provide uniformity of appearance.Surface finishing may sometimes become an intermediate step processing. For instance, cleaning and polishing are usually essential before any kind of plating process. Some of the cleaning procedures are also used for improving surface smoothness on mating parts and for removing burrs and sharp corners, which might be harmful in later use. Another important need for surface finishing is for corrosion protection in a variety of: environments. The type of protection procedure will depend largely upon the anticipated exposure, with dueconsideration to the material being protected and the economic factors involved.Satisfying the above objectives necessitates the use of main surface-finishing methods that involve chemical change of the surface mechanical work affecting surface properties, cleaning by a variety of methods, and the application of protective coatings, organic and metallic.In the early days of engineering, the mating of parts was achieved by machining one part as nearly as possible to the required size, machining the mating part nearly to size, and then completing its machining, continually offering the other part to it, until the desired relationship was obtained. If it was inconvenient to offer one part to the other part during machining, the final work was done at the bench by a fitter, who scraped the mating parts until the desired fit was obtained, the fitter therefore being a 'fitter' in the literal sense. J It is obvious that the two parts would have to remain together, and m the event of one having to be replaced, the fitting would have to be done all over again. In these days, we expect to be able to purchase a replacement for a broken part, and for it to function correctly without the need for scraping and other fitting operations.When one part can be used 'off the shelf' to replace another of the same dimension and material specification, the parts are said to be interchangeable. A system of interchangeability usually lowers the production costs as there is no need for an expensive, 'fiddling' operation, and it benefits the customer in the event of the need to replace worn parts.Automatic Fixture DesignTraditional synchronous grippers for assembly equipment move parts to the gripper centre-line,assuring that the parts will be in a known position after they arc picked from a conveyor or nest. However, in some applications, forcing the part to the centre-line may damage cither the part or equipment. When the part is delicate and a small collision can result in scrap, when its location is fixed by a machine spindle or mould, or when tolerances are tight, it is preferable to make a gripper comply with the position of the part, rather than the other way around. For these tasks, Zaytran Inc. Of Elyria, Ohio, has created the GPNseries of non- synchronous, compliant grippers. Because the force and synchronizations systems of the grippers are independent, the synchronization system can be replaced by a precision slide system without affecting gripper force. Gripper sizes range from 51b gripping force and 0.2 in. stroke to 40Glb gripping force and 6in stroke.GrippersProduction is characterized by batch-size becoming smaller and smaller and greater variety of products. Assembly, being the last production step, is particularly vulnerable to changes in schedules, batch-sizes, and product design. This situation is forcing many companies to put more effort into extensive rationalization and automation of assembly that was previously the case. Although the development of flexible fixtures fell quickly behind the development of flexible handling systems such as industrial robots, there are, nonetheless promising attempts to increase the flexibility of fixtures. The fact that fixtures are the essential product - specific investment of a production system intensifies the economic necessity to make the fixture system more flexible.Fixtures can be divided according to their flexibility into special fixtures, group fixtures, modular fixtures and highly flexible fixtures. Flexible fixtures are characterized by their high adaptability to different workpieces, and by low change-over time and expenditure.Flexible fixtures with form variability are equipped with variable form elements (e. g. needle - cheek, multileaf, and lamella - cheek), modular workpiece nonspecific holding or clamping - elements (e. g. , pneumatic modular holding - fixtures and fixtures kits with moveable elements), or with fictile and hardening media(e.g. ,panic late- fluidized - bed - fixtures and thermal clamping - fixtures).Independent of the flexibility of a fixture, there are several steps required to generate a fixture, in which a workpiece is fixed for a production task. The first step is to define the necessary position of the workpiece in the fixture, based on the unmachined or base pan, and the working features. Following this, a combination of stability planes must be selected. These stability planes constitute the fixture configuration in which the workpiece is fixed in the defined position, all the forces or torques are compensated, and the necessary access tothe working features is ensured. Finally, the necessary positions of moveable or modular fixture elements must be calculated- adjusted, or assembled, so that the workpiece is firmly fixed in the fixture. Through such a procedure the planning and documentation of the configuration and assembly of fixture can be automated.The configuration task is to generate a combination of stability planes, such that fixture forces in these planes will result in workpiece and fixture stability. This task can be accomplished conventionally, interactively or in a nearly fully automated manner. The advantages of an interactive or automated configuration determination are a systematic fixture design process, a reduction of necessary designers, a shortening of lead time and better match to the working conditions. In short, a significant enhancement of fixture productivity and economy can be achieved.With the full preparation of construction plans and a bill of materials, t time saving of up to 60% in achieving the first assembly can be realized. Hence, an aim of the fixture configuration process is the generation of appropriate documents.The following sections will describe a program procedure for automated fixture design and an application example.中文译文切削技术加工基础作为产生形状的一种方法，机械加工是所有制造过程中最普遍使用的而且是最重要的方法。

中英文资料翻译英文部分The new concept of cutting processingThe nowadays cutting tool company cannot only be again the manufacture and the sales cutting tool, in order to succeed, they must be consistent with the globalization manufacture tendency maintenance, through enhances the efficiency, cooperates with the customer reduces the cost. Approaches the instantaneous global competition after this after NAFTA, the WTO time, the world company is making quickly to the same feeling, is lighter, a cheaper response. In other words, they make the product and the components contain can in high speed under revolve, as a result of the cost pressure, best, is lighter moreover must make cheaply. Obtains these goals a best way is through develops and applies the new material, but these is new and the improvement material usually all with difficulty processes. In in this kind of commercial power and the technical difficulty combination is especially prominent in the automobile and the aviation industry, and has become has the experience the cutting tool company to research and develop the department the most important driving influence.For example, takes the modular cast iron to say that, it has become the engine part and other automobiles, the agriculture the material which see day by day with the equipment and in the machine tool industry components. This kind of alloy provides the low production cost and the good machine capability combination. They are cheaper than the steel products, but has a higher intensity and toughness compared to the cast iron. But at the same time the modular cast iron is extremely wear-resisting, has fast breaks by rubbing the cutting tool material the tendency. In this wear resistant very great degree bead luminous body content influence. Some known modular cast iron bead luminous body content higher, its resistance to wear better, moreover its machinability is worse. Moreover, the modular cast iron porosity causes off and on to cut, this even more reduces the life.May estimate that, the high degree of hardness and the high wear-resisting cutting material quality must consider the modular cast iron the high resistance to wear. And the material quality contains extremely hard TiC in fact (carbonized titanium) or TiCN (carbon titanium nitrides) thick coating when cutting speed each minute 300 meters processes the modular cast iron to prove usually is effective. But along with cutting speed increase, scrap/The cutting tool junctionplane temperature also is increasing. When has such situation, the TiC coating favors in has the chemical reaction with the iron and softens, more pressures function in anti- crescent moon hollow attrition coating. Under these conditions, hoped has one chemical stability better coating, like Al2O3 (although under low speed was inferior to TiC hard or is wear-resisting).The chemical stability becomes an important performance performance dividing line compared to the resistance to wear the factor, the speed and the temperature is decided in is processed the modular cast iron the crystal grain structure and the performance. But usually thick coating of TiCN and TiC or only ductile iron oxides in the soil coating is applied to, because the today majority of this kinds are processed the material the cutting speed in each minute 150 to 335 meters between. Is higher than each minute 300 meter applications regarding the speed, the people to this kind of material are satisfied.In order to cause this scope performance to be most superior, the mountain high researched and developed and has promoted in view of modular cast iron processing material quality TX150. This kind of material quality has hard also the anti- distortion substrate, is very ideal regarding the processing modular cast iron. Its coating the oxide compound coating which hollowly wears by thick very wear-resisting carbon titanium nitrides and a thin anti- crescent moon, the top is thin layer TiN. This kind of coating which needs the center warm chemistry gas phase deposition using the state of the art production resistance to wear and the anti- crescent moon hollow attrition which the CVD coating complete degree of hardness moreover the tough smoothness increases (MTCVD) the craft. Substrate/The coating combination performance gives the very high anti- plastic deformation and the cutting edge micro collapses the ability, causes it to become under the normal speed to process the modular cast iron the ideal material quality.The coating ceramics also display can effectively process the modular cast iron. In the past, the aluminum oxide ceramics application which not the coating tough good such as nitriding silicon and the silicon carbide textile fiber strengthened the work piece material chemistry paralysis limit. Today but could resist the scrap distortion process through the use to have the high thermal coating cutting tool life already remarkably to increase. But certain early this domains work piece processing use aluminum oxides spread the layer crystals to have to strengthen the ceramics, today most research concentrate in the TiN coating nitriding silicon. This kind of coating can remarkably open up the tough good ceramics the application scope.When machining, the work piece has processed the surface is depends upon the cutting tool and the work piece makes the relative motion to obtain.According to the surface method of formation, the machining may divide into the knife point path law, the formed cutting tool law, the generating process three kinds.The knife point path law is depends upon the knife point to be opposite in the work piecesurface path, obtains the superficial geometry shape which the work piece requests, like the turning outer annulus, the shaping plane, the grinding outer annulus, with the profile turning forming surface and so on, the knife point path are decided the cutting tool and the work piece relative motion which provides in the engine bed;The formed cutting tool law abbreviation forming, is with the formed cutting tool which matches with the work piece final superficial outline, or the formed grinding wheel and so on processes the formed surface, like formed turning, formed milling and form grinding and so on, because forms the cutting tool the manufacture quite to be difficult, therefore only uses in processing the short formed surface generally;The generating process name rolls cuts method, is when the processing the cutting tool and the work piece do unfold the movement relatively, the cutting tool and the work piece centrode make the pure trundle mutually, between both maintains the definite transmission ratio relations, obtains the processing surface is the knife edge in this kind of movement envelope, in the gear processing rolls the tooth, the gear shaping, the shaving, the top horizontal jade piece tooth and rubs the tooth and so on to be the generating process processing.Some machining has at the same time the knife point path law and the formed cutting tool method characteristic, like thread turning.The machining quality mainly is refers to the work piece the processing precision and the surface quality (including surface roughness, residual stress and superficial hardening).Along with the technical progress, the machining quality enhances unceasingly.The 18th century later periods, the machining precision counts by the millimeter; At the beginning of 20th century, machining precision Gao Yida 0.01 millimeter; To the 50's, the machining precision has reached a micron level; The 70's, the machining precision enhances to 0.1 micron.The influence machining quality primary factor has aspects and so on engine bed, cutting tool, jig, work piece semifinished materials, technique and processing environment.Must improve the machining quality, must take the suitable measure to the above various aspects, like reduces the engine bed work error, selects the cutting tool correctly, improves the semifinished materials quality, the reasonable arrangement craft, the improvement environmental condition and so on.Enhances the cutting specifications to enhance the material excision rate, is enhances the machining efficiency the essential way.The commonly used highly effective machining method has the high-speed cutting, the force cutting, the plasma arc heating cuts and vibrates the cutting and so on.The grinding speed is called the high-speed grinding in 45 meters/second above es the high-speed cutting (or grinding) both may enhance the efficiency, and mayreduce the surface roughness.The high-speed cutting (or grinding) requests the engine bed to have the high speed, the high rigidity, the high efficiency and the vibration-proof good craft system; Requests the cutting tool to have the reasonable geometry parameter and the convenience tight way, but also must consider the safe reliable chip breaking method.The force cutting refers to the roughing feed or cuts the deep machining greatly, uses in the turning and the grinding generally.The force turning main characteristic is the lathe tool besides the main cutting edge, but also some is parallel in the work piece has processed superficial the vice-cutting edge simultaneously to participate in the cutting, therefore may enhance to feed quantity compared to the general turning several times of even several pares with the high-speed cutting, the force cutting cutting temperature is low, the cutting tool life is long, the cutting efficiency is high; The shortcoming is processes the surface to be rough.When force cutting, the radial direction cutting force death of a parent is not suitable for to process the tall and slender work piece very much.The vibration cutting is along the cutting tool direction of feed, the attachment low frequency or the high frequency vibration machining, may enhance the cutting efficiency.The low frequency vibration cutting has the very good chip breaking effect, but does not use the chip breaking equipment, makes the knife edge intensity to increase, time the cutting total power dissipation compared to has the chip breaking installment ordinary cutting to reduce about 40%.The high frequency vibration cutting also called the ultrasonic wave vibration cutting, is helpful in reduces between the cutting tool and the work piece friction, reduces the cutting temperature, reduces the cutting tool the coherence attrition, thus the enhancement cutting efficiency and the processing surface quality, the cutting tool life may enhance 40% approximately.To lumber, plastic, rubber, glass, marble, granite and so on nonmetallic material machining, although is similar with the metal material cutting, but uses the cutting tool, the equipment and the cutting specifications and so on has the characteristic respectively.The lumber product machining mainly carries in each kind of joiner's bench, its method mainly has: The saw cuts, digs cuts, the turning, the milling, drills truncates with the polishing and so on.The plastic rigidity is worse than the metal, the easy bending strain, the thermoplastic thermal conductivity to be in particular bad, easy to elevate temperature the conditioning.When cutting plastic, suitably with the high-speed steel or the hard alloy tools, selects the small to feed quantity and the high cutting speed, and uses compressed air cooling.If the cutting tool is sharp, the angle is appropriate, may produce the belt-shaped scrap, easy to carry off the quantity of heat.Glass (including semiconducting material and so on germanium, silicon) but degree of hardness high brittleness is big.To methods and so on glass machining commonly used cutting, drill hole, attrition and polishing.To thickness in three millimeters following glass plates, the simple cutting method is with the diamond or other hard materials, in glass surface manual scoring, the use scratch place stress concentration, then uses the hand to break off.To the marble, the granite and the concrete and so on the hard material processing, mainly uses methods and so on cutting, turning, drill hole, shaping, attrition and polishing.When cutting the available circular saw blade adds the grinding compound and the water; The outer annulus and the end surface may use the negative rake the hard alloy lathe tool, by 10~30 meter/minute cutting speed turning; Drills a hole the available hard alloy drill bit; The big stone material plane available hard alloy planing tool or rolls cuts planing tool shaping; The precise smooth surface, available three mutually for the datum to the method which grinds, or the grinding and the polishing method obtains.Cutting tool in hot strong alloy applicationThe aviation processing also changes rapidly. For example, nickel base heat-resisting alloy like several years ago the most people had not heard Rene88 now occupies to the aircraft engine manufacture uses the total metal quantity 10~25%. Has very good showing and the commercial reason regarding this. For example, these heat strong alloy will be able to increase the engine endurance moreover to permit the small engine work on the big airplane, that will enhance the combustion efficiency and reduces the operation cost. These tough good materials also present the expense on the cutting tool. Their thermal stability causes on the knife point the temperature to be higher, thus reduced the cutting tool life. Similarly, in these alloy carbide pellet remarkably increased the friction, thus reduces the cutting tool life.As a result of changes in these conditions, can be very pleased to have processed many titanium alloys and nickel-based alloy materials C-2 hard metal alloys, in the application to today's cutting edge of blade to the crushing and cutting depth of the trench lines badly worn. But using the latest high-temperature processing of small particles hard metal alloys to be effective, cutlery life improved, but more importantly to enhance the reliability of applications in high-temperature alloys. Small particles hard metal than traditional hard metal materials higher compression strength and hardness, only a small increase in the resilience of the cost. And resulted in high temperature alloy processing than traditional hard metal resistance common failure mode more effective.PVD (physical gas phase deposition) coating also by certificate effective processing heat-resisting alloy. TiN (titanium nitrides) the PVD coating was uses and still was most early most receives welcome. Recently, TiAlN (nitrogen calorization titanium) and TiCN (carbontitanium nitrides) the coating also could very good use. In the past the TiAlN coating application scope and TiN compared the limit to be more. But after the cutting speed enhances them is a very good choice, enhances the productivity in these applications to reach 40%. On the other hand, is decided under the low cutting speed in coating superficial operating mode TiAlN can cause to accumulate the filings lump afterwards, micro collapses with the trench attrition.Recently, used in the heat-resisting alloy application material quality already developing, these coating but became by several combinations. The massive laboratories and the scene test has already proven this kind of combination and other any kind of sole coating compares in time the very wide scope application is very effective. Therefore aims at the heat-resisting alloy application the PVD compound coating possibly to become the focal point which the hard alloy new material quality research and development continues. With the MTCVD coating, the coating ceramics gather in the same place, they hopefully become a more effective processing to research and develop newly are more difficult to process the work piece material the main impact strength.Dry processingIncluding the refrigerant question is technical and the commercial expansion industrial production tendency another domain which the cutting tool makes. North America and the European strict refrigerant management request and the biggest three automobile manufacturer forces them the core supplier to obtain the ISO14000 authentication (the ISO9000 environment management edition), this causes the refrigerant processing cost rise. To the car company and their core supplier said obviously one of responses which welcome is in the specific processing application avoids completely the refrigerant the use. This kind did the processing the new world to propose a series of challenges for the cutting tool supplier.Recently, already appeared some to concern this topic to promulgate the speed, to enter for, the coating chemical composition and other parameters very substantial comprehensive nature very strong useful technical papers. Wants to concentrate the elaboration in here me "does the processing viewpoint" in the operation and commercial meaning automobile manufacturer new.The metal working jobholders can the very good understanding related refrigerant use question, but majority cannot understand concerns except the technical challenge (for example row of filings) beside does the processing question in the cutting tool - work piece contact face between. Usually may observe to the refrigerant disperser scrap which flows out, but the pressure surpasses 3,000 pounds/An inch 2 high speed refrigerant also can help to break the filings, specially soft also the continual scrap can cause in the cutting tool - work piece contact face trouble.Uses does the cutting craft the components result is the engine bed uses the wet typeprocessing components to be hotter than. Whether before you do allow them to survey in the open-air natural cooling? If processes newly the hot components put frequently to the turnover box, elevates the environment temperature, whether components full cooling and just right enough permission precision examination? Also has the handling side several dozens on hundred components to be able to operate the worker to increase the extra burden.With many cutting tools/The work piece technical question same place, these latent questions need to state whether dryly adds the ability line. Luckily, has very many ways to elaborate these questions. For example, the compressed air was proven row of filings becomes the question in very many applications the situation to have the successful echo.Another plan is called MQL (minimum lubrication) a technology, it replaces the traditional refrigerant by the application the quite few oil mists constitution. This is a recognition compromise plan, this kind of minimum technology can large scale reduce the refrigerant the headache matter, moreover the smooth finish which processes in many applications very is also good. This domain still had very many research to do, moreover the cutting tool company positively participated in such research was absolutely essential. If they will not do fall behind the competitor, will be at the disadvantageous position.In the factory the special details design other perhaps better plan according to the world in. The manufacturing industry jobholders possibly still could ask why they do have to use recent development the technology to replace the refrigerant method diligently which the tradition already an experience number generation of person improved enhances, because implemented especially does the experiment and the defeat which the processing or the subarid processing produced possibly causes the higher short-term cutting tool cost. The concise answer is when the bit probably accounts for the model processing components cost 3%, the refrigerant cost (from purchases to maintenance, storage, processing) can account for the components cost 15%.Perhaps does the dry processing is not all suits to each application, but above discusses likely other processing questions are same, needs from a wider operation, the environment and the commercial angle appraises. Will be able to help the cutting tool company which the customer will do this to have the competitive advantage, but these will not be able to provide unceasingly is in the passive position.Cutting tool and nanotechnologyCan fiercely change the cutting tool industry the enchanting new domain is the miniature manufacture, or the processing small granule forms the product which needs. Must refer to is its here does not have about the cutting tool miniature manufacture first matter; Second must say the matter is it is not remote.Why the miniature manufacture and are the cutting tool related. Because most main is theparticle size smaller, the hard alloy toughness of material better also is more wear-resisting. (Some experts define with the nanometer level pellet for are smaller than 0.2 mu m, but other people persisted a nanometer pellet had to be smaller than the hard alloy tools prototype which 0.1 mu m) made already to complete and the test,It is said that wear resistant theatrically increase. The question is the nanometer level hard alloy pellet cannot depend on the smashing big material formation, they are certain through the smaller material constitution, but processes the molecular level granule is not easy and the economical matter.中文部分切削加工新概念现今的刀具公司再也不能只是制造和销售刀具，为了成功，他们必须与全球化制造趋势保持一致，通过提高效率、同客户合作来降低成本。

金属热处理中英文对照外文翻译文献中英文对照外文翻译文献(文档含英文原文和中文翻译)原文：Heat treatment of metalThe generally accepted definition for heat treating metals and metalalloys is “heating and cooling a solid metal or alloy in a way so as to obtain specific conditions or properties.” Heating for the sole purpose of hot working (as in forging operations) is excluded from this definition．Likewise，the types of heat treatment that are sometimes used for products such as glass or plastics are also excluded from coverage by this definition．Transformation CurvesThe basis for heat treatment is the time-temperature-transformation curves or TTT curves where，in a single diagram all the three parameters are plotted．Because of the shape of the curves，they are also sometimes called C-curves or S-curves．To plot TTT curves，the particular steel is held at a given temperature and the structure is examined at predetermined intervals to record the amount of transformation taken place．It is known that the eutectoid steel (T80) under equilibrium conditions contains，all austenite above 723℃，whereas below，it is the pearlite．To form pearlite，the carbon atoms should diffuse to form cementite．The diffusion being a rate process，would requiresufficient time for complete transformation of austenite to pearlite．From different samples，it is possible to note the amount of the transformation taking place at any temperature．These points are then plotted on a graph withtime and temperature as the axes．Through these points，transformation curves can be plotted as shown in Fig.1 for eutectoid steel．The curve at extreme left represents the time required for the transformation of austenite to pearlite to start at any given temperature．Similarly，the curve at extreme right represents the time required for completing the transformation．Between the two curves are the points representing partial transformation. The horizontal lines Ms and Mf represent the start and finish of martensitic transformation.Classification of Heat Treating ProcessesIn some instances，heat treatment procedures are clear-cut in terms of technique and application．whereas in other instances，descriptions or simple explanations are insufficient because the same technique frequently may be used to obtain different objectives．For example, stress relieving and tempering are often accomplished with the same equipment and by use of identical time and temperature cycles．The objectives，however，are different for the two processes．The following descriptions of the principal heat treating processes are generally arranged according to their interrelationships．Normalizing consists of heating a ferrous alloy to a suitable temperature (usually 50°F to 100°F or 28℃ to 56℃) above its specific upper transformation temperature．This is followed by cooling in still air to at least some temperature well below its transformation temperature range．For low-carbon steels, the resulting structure and properties are the same as those achieved by full annealing；for most ferrous alloys, normalizing and annealing are not synonymous.Normalizing usually is used as a conditioning treatment, notably for refining the grains of steels that have been subjected to high temperatures for forging or other hot working operations. The normalizing process usually is succeeded by another heat treating operation such as austenitizing for hardening, annealing, or tempering.Annealing is a generic term denoting a heat treatment that consists of heating to and holding at a suitable temperature followed by cooling at a suitable rate. It is used primarily to soften metallicmaterials, but also to simultaneously produce desired changes in other properties or in microstructure. The purpose of such changes may be, but isnot confined to, improvement of machinability, facilitation of cold work (known as in-process annealing), improvement of mechanical or electrical properties, or to increase dimensional stability. When applied solely torelive stresses, it commonly is called stress-relief annealing, synonymouswith stress relieving.When the term “annealing” is applied to ferrous alloys witho ut qualification, full annealing is applied. This is achieved by heating abovethe alloy’s transformation temperature, then applying a cooling cycle which provides maximum softness. This cycle may vary widely, depending oncomposition and characteristics of the specific alloy.Quenching is a rapid cooling of a steel or alloy from the austenitizing temperature by immersing the work piece in a liquid or gaseous medium. Quenching medium commonly used include water, 5% brine, 5% caustic in an aqueous solution, oil, polymer solutions, or gas (usually air or nitrogen).Selection of a quenching medium depends largely on the hardenability of material and the mass of the material being treating (principally section thickness).The cooling capabilities of the above-listed quenching media vary greatly.In selecting a quenching medium, it is best to avoid a solution that has more cooling power than is needed to achieve the results, thus minimizing the possibility of cracking and warp of the parts being treated. Modifications ofthe term quenching include direct quenching, fog quenching, hot quenching, interrupted quenching, selective quenching, spray quenching, and time quenching.Tempering. In heat treating of ferrous alloys, tempering consists of reheating the austenitized and quench-hardened steel or iron to somepreselected temperature that is below the lower transformation temperature (generally below 1300 ℃ or 705 ℃ ). Tempering offers a means of obtaining various combinations of mechanical properties. Tempering temperatures used for hardened steels are often no higher than 300 ℃(150 ℃). The term “tempering” should not be confused with either process annealing or stress relieving. Even though time and temperature cycles for the three processes may be the same,the conditions of the materials being processed and the objectives may be different.Stress relieving. Like tempering, stress relieving is always done by heating to some temperature below the lower transformation temperature for steels and irons. For nonferrous metals, the temperature may vary fromslightly above room temperature to several hundred degrees, depending on the alloy and the amount of stress relief that is desired.The primary purpose of stress relieving is to relieve stresses that have been imparted to the workpiece from such processes as forming, rolling, machining or welding. The usual procedure is toheat workpiece to the pre-established temperature long enough to reduce the residual stresses (this is a time-and temperature-dependent operation) to an acceptable level; this is followed by cooling at a relatively slow rate to avoid creation of new stresses.The generally accepted definition for heat treating metals and metalalloys is “heating and cooling a solid metal or alloy in a way so as to obtain specific conditions or properties.” Heating for the sole purpose of hot working (as in forging operations) is excluded from this definition．Likewise，the types of heat treatment that are sometimes used for products such as glass or plastics are also excluded from coverage by this definition．Transformation CurvesThe basis for heat treatment is the time-temperature-transformation curves or TTT curves where，in a single diagram all the three parameters are plotted．Because of the shape of the curves，they are also sometimes called C-curves or S-curves．To plot TTT curves，the particular steel is held at a given temperature and the structure is examined at predetermined intervals to record the amount of transformation taken place．It is known that the eutectoid steel (T80) under equilibrium conditions contains，all austenite above 723℃，whereas below，it is pearlite．To form pearlite，the carbon atoms should diffuse to form cementite．The diffusion being a rate process，would require sufficient time for complete transformation of austenite to pearlite．From different samples，it is possible to note the amount of the transformation taking place at any temperature．These points are then plotted on a graph with time and temperature as the axes．Through these points，transformation curves can be plotted as shown in Fig.1 for eutectoid steel．The curve at extreme leftrepresents the time required for the transformation of austenite to pearlite to start at any given temperature．Similarly，the curve at extreme right represents the time required for completing the transformation．Between the two curves are the points representing partial transformation. The horizontal lines Ms and Mf represent the start and finish of martensitic transformation.Classification of Heat Treating ProcessesIn some instances，heat treatment procedures are clear-cut in terms of technique and application．whereas in other instances，descriptions or simple explanations are insufficient because the same technique frequently may be used to obtain different objectives．For example, stress relieving and tempering are often accomplished with the same equipment and by use of identical time and temperature cycles．The objectives，however，are different for the two processes．The following descriptions of the principal heat treating processes are generally arranged according to their interrelationships．Normalizing consists of heating a ferrous alloy to a suitable temperature (usually 50°F to 100°F or 28℃ to 56℃) above its specific upper transformation temperature．This is followed by cooling in still air to at least some temperature well below its transformation temperature range．For low-carbon steels, the resulting structure and properties are the same as those achieved by full annealing；for most ferrous alloys, normalizing and annealing are not synonymous.Normalizing usually is used as a conditioning treatment, notably for refining the grains of steels that have been subjected to high temperaturesfor forging or other hot working operations. The normalizing process usuallyis succeeded by another heat treating operation such as austenitizing for hardening, annealing, or tempering.Annealing is a generic term denoting a heat treatment that consists of heating to and holding at a suitable temperature followed by cooling at a suitable rate. It is used primarily to soften metallic materials, but also to simultaneously produce desired changes in other properties or in microstructure. The purpose of such changes may be, but is not confined to, improvement of machinability, facilitation of cold work (known as in-process annealing), improvement of mechanical or electrical properties, or to increasedimensional stability. When applied solely to relive stresses, it commonly is called stress-relief annealing, synonymous with stress relieving.When the term “annealing” is applied to ferrous alloys witho ut qualification, full annealing is applied. This is achieved by heating above the alloy’s transformation temperature, then applying a cooling cycle which provides maximum softness. This cycle may vary widely, depending on composition and characteristics of the specific alloy.Quenching is a rapid cooling of a steel or alloy from the austenitizing temperature by immersing the workpiece in a liquid or gaseous medium. Quenching medium commonly used include water, 5% brine, 5% caustic in an aqueous solution, oil, polymer solutions, or gas (usually air or nitrogen).Selection of a quenching medium depends largely on the hardenability of material and the mass of the material being treating (principally section thickness).The cooling capabilities of the above-listed quenching media vary greatly. In selecting a quenching medium, it is best to avoid a solution that has more cooling power than is needed to achieve the results, thus minimizing the possibility of cracking and warp of the parts being treated. Modifications of the term quenching include direct quenching, fog quenching, hot quenching, interrupted quenching, selective quenching, spray quenching, and time quenching.感谢您的阅读，祝您生活愉快。