【机械类文献翻译】机床夹具的分类与构成

毕业设计英文翻译翻译题目::机床夹具的分类与构成翻译题目学生姓名::学生姓名所在班级::所在班级Machine classification and pose fixture1fixture in the role of machiningWorkpiece clamping fixture is a kind of process equipment,it is widely used in mechanical machining of the manufacturing process,heat treatment,assembly, welding and testing processes.In the use of metal-cutting machine tools collectively referred to as the jig fixture.n a modern production machine is an indispensable fixture of the process equipment,machining of the workpiece,the processing requirements in order to ensure.First of all to the workpiece and the machine tool relative to a correct position,and this location during processing does not change the impact of external forces.To this end,during the pre-machining,workpiece clamping must be good.There are two ways to clamp workpiece:one is directly clamping the workpiece in the machine table or on the chuck;The other is the workpiece in the fixture on the fixture.The first method used when the workpiece clamping,the general design requirements have to press lines in the surface to draw the size and location,clamping,or when the needle is zoned dial indicator to find is after the clamping.This method need special equipment,but low efficiency,are generally used for one-piece and small batch rge quantities,mostly with the workpiece clamping fixture.With the merits of the workpiece clamping fixtures are as follows: (l)Guarantee the stability of the machining accuracy of workpiece.Workpieces with clamping fixture,the workpiece relative to the location of tool and machine tool to ensure the accuracy of the fixture from the technical level of workers,so that a number of workpiece machining accuracy of the line.(2)To improve labor productivity.Workpiece clamping fixture can facilitate the user easily、rapidly,and the workpiece does not need to find is crossed,can significantly reduce the supplementary working hours,to improve labor productivity; workpiece in the fixture after the fixture to improve the rigidity of the workpiece,thus cutting the amount of increase,to improve labor productivity;can use more pieces of multi-workpiece clamping fixture,and the use of efficient clamping bodies,to further improve labor productivity.(3)To expand the use of machine tools.Machine tools in general use a dedicated machine tool fixture can expand the scope of the process and give full play to the potential of machine tools to achieve a multi-machine use.For example,the use of a dedicated fixture can be easily Lathe processing small box to the workpiece.Even in the lathe out of oil,a reduction of expensive dedicated machines,reducing the cost,which is particularly important for small and medium-sized factories.(4)To improve the operator's working conditions.As the pneumatic,hydraulic, electro-magnetic power source,such as the application in the fixture,on the one hand to reduce the labor intensity of workers;the other hand,it guarantees the reliability of the workpiece clamping,and to achieve the interlocking machine,to avoid accidents, ensure the operator safety and machine tool equipment(5)To reduce costs.In mass production after the use of fixture,from stem to increase labor productivity,lower level technical workers,as well as lower scrap and other reasons,obviously to reduce the production costs.Fixture manufacturing cost-sharing in a group of workpieces,each workpiece to increase the cost is very minimal,far less than as a result of increased labor productivity and reduce costs.The greater volume of workpiece,fixture made to use has become more significant economic benefits.2Fixture Category2.1General characteristics of the fixture by CategoryAccording to the production in different types of fixtures in the common characteristics of machine tool fixture fixture can be divided into general,special fixtures,adjustable clamp,and automatic line of modular fixture fixture,such as:(l) General Fixture.Universal fixture refers to the structure,size has been standardized, and has a certain universal fixture.This type of fixture adaptable,can be used to setup the scope of a certain shape and size of various parts.(2)A dedicated fixture.This type of fixture is designed for a particular part of the processing procedures and the design and manufacture.Relatively stable in the product,the production of larger quantities, used a variety of special fixtures,access to higher productivity and machining accuracy.(3)Adjustable fixture.Adjustable fixture for general fixture and special fixture and the defects developed a new kind of fixture.Of different types and sizes of the workpiece,simply adjust or replace the fixture at the original location of the individual components and will be used to clamp components.（4)Modular Fixture. Modular fixture is a modular fixture.Standard components of the module with high precision and resistance to abrasion,can be assembled into a variety of fixtures. Removable fixture used to clean the assembly after the new fixture left.（5) Automatic line fixture.Automatic line clamp generally divided into two categories: fixed-type fixture,which is similar to a dedicated fixture;other accompanying a fixture for the use of the workpiece in the fixture,together with the movement,andautomatic workpiece along the line from a move to the next position position for processing.2.2Classification by the use of machine tools ClassificationBy the use of machine tools can be divided into lathe jig fixtures,milling fixtures, drilling fixtures,hang-bed fixture,jig gear machine,CNC machine tool fixture, automatic machine tool fixtures,accompanied by automatic line,and other fixtures, such as machine tools.This is a special fixture design of the classification method used.Dedicated fixture design,the machine group,the type and the main parameters have been determined.Their difference is the cutting forming machine tool movements,so the connection fixture with the machine in different ways.Machining accuracy of their different requirements.2.3Clamping fixture according to the power sourceClamping fixture according to the power source can be divided into manual fixture, pneumatic fixtures,hydraulic fixtures,gas fixtures by force,electromagnetic fixture, vacuum fixtures,fixture,such as centrifugal force.3the composition of fixtureAlthough the structure of machine tool fixture range,but their components can be summarized as the following sections.(1)Positioning components.Typically,when the shape of the workpiece datum position established,the position will be the basic components of the structure identified(2)Clamping device.Positioning of the workpiece in the fixture,the need to clamp the workpiece before processing to ensure that the workpiece during processing is not due to external force and undermine its position.(3)The specific folder.Fixture and the skeleton matrix,all the components through the fixture it will constitute a whole.(4)Of the knife or the guide.Tool used to determine position relative to the correct position of components.Of the knife device common in milling fixture. Used to adjust the cutter knife block position before machining.(5)To connect components.Connected components in the machine tool fixture is todetermine the correct position on the component,therefore,can double as a specific folder to connect the fixture on the transition plate,the positioning of milling machine fixture on key components are connected.(6)Other devices or components.According to the processing needs,somedegree fixture device were used by mode device,the whole device,and the balance of the top block and so on.These components or devices specially designed need.机床夹具的分类与构成1机床夹具在机械加工中的作用夹具是一种装夹工件的工艺装备，它广泛地应用于机械制造过程的切削加工、热处理、装配、焊接和检测等工艺过程中。