CA6140车床拨叉831002加工工艺编制及夹具设计

I 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 工序 工艺 定位方案

II Abstract

Enable producing the target in process of production (raw materials, the blank ,

state of quality and quantity on part become always ) 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 process need this of process to want,

the locomotive of processing , this process , and the entering the giving amount of

the lathe, cut depth , the rotational speed of the main shaft and speed of cutting, the

jig of this process, the cutter and measuring tool, a one hundred sheets of number

of times still leaves and a one hundred sheets of length leaves, calculate basic time

of this process , auxiliary time and service time of place of working finally.

Keywords The process worker one orient the scheme

III 目 录

摘 要 ............................................................................................................................. Ⅰ

Abstract......................................................................................................................... Ⅱ

第1章 绪论 ..................................................................................................................... 1

1.1选题的意义........................................................................................................ 1

1.2夹具的发展方向................................................................................................ 1

1.3本章小结 ............................................................................................................ 3

第2章 拨叉的加工工艺规程设计 ................................................................................. 4

2.1零件的分析......................................................................................................... 4

2.1.1零件的作用 ................................................................................................ 4

2.1.2零件的工艺分析 ........................................................................................ 4

2.2确定生产类型..................................................................................................... 5

2.3确定毛坯 ............................................................................................................. 5

2.3.1确定毛坯种类 ............................................................................................ 5

2.3.2确定铸件加工余量及形状 ........................................................................ 5

2.3.3绘制铸件零件图 ........................................................................................ 6

2.4工艺规程设计..................................................................................................... 7

2.4.1选择定位基准 ............................................................................................ 7

2.4.2制定工艺路线 ............................................................................................ 8

2.4.3选择加工设备和工艺设备 ...................................................................... 10

2.4.4机械加工余量、工序尺寸及公差的确定 .............................................. 10

2.5确定切削用量及基本工时............................................................................... 11

工序10：粗铣Φ25H7的两端面 .................................................................... 11

工序20：钻、扩、铰Φ25H7通孔 ................................................................ 12

工序30：粗镗下端Φ60H12孔 ...................................................................... 16

工序40：半精镗下端Φ60H12孔 .................................................................. 16

工序50：粗铣a、b面 .................................................................................... 17

工序60：钻Φ20.50孔 .................................................................................... 19

工序70：攻M22×1.5螺纹 ........................................................................... 21 IV 工序80：粗铣16H11槽 ................................................................................. 21

工序90：精铣16H11槽 ................................................................................. 22

工序100：铣断Φ60H12孔 ............................................................................ 23

工序110：粗铣Φ60H12孔两端面 ................................................................ 24

工序120：精铣Φ60H12孔两端面 ................................................................ 25

2.6本章小结 ........................................................................................................... 26