毕业设计CA6140机床后托架加工工艺及夹具设计[1]

CA6140机床后托架加工工艺及夹具设计

本科毕业设计（论文）

CA6140车床后托架

加工工艺及夹具设计

学生姓名： 蔡为国

学生学号： 院 （系）： 机电工程系

年级专业： 08数控(2)班

指导教师： 王益辉

年 月

CA6140机床后托架加工工艺及夹具设计

摘 要

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，工步，加工余量，定位方案，夹紧力

CA6140机床后托架加工工艺及夹具设计

Abstract

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, worker's step , the surplus of processing,

orient the scheme , clamp strength

CA6140机床后托架加工工艺及夹具设计

目 录

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

ABSTRACT ................................................................................................................. II

1 CA6140机床后托架加工工艺 ............................................................................... 3

1.1 CA6140机床后托架的工艺分析 ............................................................................... 3

1.2 CA6140机床后托架的工艺要求及工艺分析 ............................................................. 3

1.2.1 CA6140机床`后托架的技术要求 ...................................................................... 4

1.3 加工工艺过程 ........................................................................................................ 4

1.4 确定各表面加工方案 .............................................................................................. 4

1.4.1 在选择各表面及孔的加工方法时，要综合考虑以下因素 .................................. 4

1.4.2 平面的加工..................................................................................................... 4

1.4.3孔的加工方案 .................................................................................................. 4

1.5 确定定位基准 ........................................................................................................ 5

1.5.1 粗基准的选择 ................................................................................................. 5

1.5.2 精基准选择的原则 .......................................................................................... 6

1.6 工艺路线的拟订 ..................................................................................................... 6

1.6.1工序的合理组合 .............................................................................................. 7

1.6.2 工序的集中与分散 .......................................................................................... 7

1.6.3 加工阶段的划分.............................................................................................. 8

1.6.4 加工工艺路线方案的比较 ............................................................................... 9

1.7 CA6140机床后托架的偏差，加工余量，工序尺寸及毛坯尺寸的确定 .................... 12

1.7.1 毛坯的结构工艺要求 .................................................................................... 12

1.7.2 CA6140机床后托架的偏差计算 ...................................................................... 13

1.8 确定切削用量及基本工时（机动时间） ................................................................ 16

1.8.1 工序1：粗、精铣底面 .................................................................................. 16

1.8.2 工序2 粗、半精、精镗CA6140侧面三杠孔 ................................................. 18

1.8.3 工序3：钻顶面四孔 ..................................................................................... 24

1.8.4 工序4：钻侧面两孔 ..................................................................................... 28

1.9 时间定额计算及生产安排 ..................................................................................... 30

1.9.1 粗、精铣底面 ............................................................................................... 30

1.9.2 镗侧面三杠孔 ............................................................................................... 31

1.9.3 钻顶面四孔................................................................................................... 32

2 专用夹具设计 ....................................................................... 错误！未定义书签。

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