毕业设计说明书

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毕业设计说明书

毕业设计说明书

论⽂题⽬:左⽀座零件的机械加⼯⼯艺规程及⼯艺装备设计

系部:机械⼯程系

摘要

在⽣产过程中,使⽣产对象(原材料,⽑坯,零件或总成等)的质和量的状态发⽣直接变化的过程叫⼯艺过程,如⽑坯制造,机械加⼯,热处理,装配等都称之为⼯艺过程。在制定⼯艺过程中,要确定各⼯序的安装⼯位和该⼯序需要的⼯步,加⼯该⼯序的机车及机床的进给量,切削深度,主轴转速和切削速度,该⼯序的夹具,⼑具及量具,还有⾛⼑次数和⾛⼑长度,最后计算该⼯序的基本时间,辅助时间和⼯作地服务时间。

关键词:⼯艺规程;定位误差;夹紧;加⼯余量;夹紧⼒ABSTRACT

Enable producing the target in process of production (raw materials, the blank , state of quality and quantity on part becomealways ) take place direct course of change ask craft course, if the blank is made, machining, heat treatment , assemble etc.and call it the craft course. In the course of making the craft , is it confirm every erector location and worker step that processneed this of process to want, the locomotive of processing , this process , and the entering the giving amount of the lathe, cutdepth , the rotational speed of the main shaft and speed of cutting, the jig of this process, the cutter and measuring tool, a onehundred sheets of number of times still leaves and a one hundred sheets of length leaves, calculate basic time of thisprocess , auxiliary time and service time of place of working finally.

Keywords:Technical instruction, position error ,clump , the surplus of processing ,clamp strength

⽬ 录

摘 要 ................................................................................................................................. I 绪 论................................................................................................................................ 1 第1章 车床左⽀座零件的分析及⽑坯的确定 (2)

1.1 车床左⽀座的作⽤和⼯艺分析 .................................................................................................... 2 1.1.1 零件的作⽤................................................................................................................................ 2 1.1.2 零件的⼯艺分析......................................................................................................................... 3 1.2 零件⽑坯的确定........................................................................................................................... 3 1.2.1 ⽑坯材料的制造形式及热处理................................................................................................. 3 1.2.2 ⽑坯结构的确定. (4)

第2章 车床左⽀座的加⼯⼯艺设计 (5)2.1 ⼯艺过程设计中应考虑的主要问题 ............................................................................................ 5 2.1.1 加⼯⽅法选择的原则................................................................................................................. 5 2.1.2 加⼯阶段的划分......................................................................................................................... 5 2.1.3 加⼯顺序的安排......................................................................................................................... 6 2.1.4 ⼯序的合理组合......................................................................................................................... 7 2.2 基准的选择................................................................................................................................... 7 2.2.1 粗基准和精基准的具体选择原则............................................................................................. 7 2.2.2 选择本题零件的基准................................................................................................................. 8 2.3 机床左⽀座的⼯艺路线分析与制定............................................................................................ 9 2.

3.1 ⼯序顺序的安排的原则 ............................................................................................................. 9 2.3.2 ⼯艺路线分析及制定................................................................................................................. 9 2.4 机械加⼯余量............................................................................................................................. 12 2.

4.1 影响加⼯余量的因素 ............................................................................................................... 12 2.4.2 机械加⼯余量、⼯序尺⼨以及⽑坯余量的确定 ................................................................... 12 2.5 确定切削⽤量及基本⼯时.......................................................................................................... 15 2.

5.1 ⼯序⼀ 粗铣?80H9(087

.00

)mm 孔⼤端端⾯ (15)2.5.2 ⼯序⼆ 粗镗?80H9内孔 ....................................................................................................... 18 2.5.3 ⼯序三 精铣?80H9⼤端端⾯.. (19)

第3章 专⽤夹具设计 (22)3.1 定位基准及定位元件的选择 ...................................................................................................... 22 3.2 切削⼒及夹紧⼒的计算.............................................................................................................. 22 3.3 定位误差分析与计算.................................................................................................................. 23 3.4 夹具设计及操作的简要说明 (24)