机械5

摘要 夹具是零件加工的夹紧装置，是加工零件的一种必不可少的装置。夹具利用率高，经济性好，对功能组件的使用和数量少。随着零件的尺寸变化，越来越多的夹具被淘汰了，因此，设计一套专用夹具是十分有必要的。在设计专用夹具时要考虑工件的定位方案，工件的夹紧方案和设计夹紧机构，夹具的其他组成部分，夹具的结构形式等。 本课题主要是设计CA6140尾座体的加工工艺及其夹具设计，根据老师给的图纸要求进行工艺设计和夹具设计，在掌握零件作用的基础上，对零件的工艺进行分析。针对设计给定的题目，设计里面主要对机床夹具进行设计。本夹具体是以保证加工精度，生产效率和便于工人操作为宗旨展开的设计。 设计之初我查阅相关数据及国内外关于机床夹具的文献，在看懂零件图的同时对零件的结构和工艺进行分析，明确粗基准和精基准的选择，确定零件的加工余量与毛坯的尺寸、从而确定零件的加工工艺过程、计算各工序的切削用量及工时。最终完成了本次设计所需的夹具。 关键词CA6140尾座体，加工工艺，夹具设计，切削用量 Abstract Jig is a clampi
ng device for parts processi
ng,which is a
n esse
ntial device for processi
ng parts. The fixture has the adva
ntages of high utilizatio
n rate, good eco
nomy a
nd less fu
nctio
nal compo
ne
nts. With the size cha
nge of parts, more a
nd more fixtures have bee
n elimi
nated. Therefore, desig
ni
ng a special fixture isvery
necessary. Whe
n the special fixture is desig
ned, the positio
ni
ng scheme of theworkpiece should be co
nsidered, the clampi
ng scheme of theworkpiece a
nd the desig
n a
nd clampi
ng mecha
nism, the other compo
ne
nts of the fixture, the structural form of the fixture a
nd so o
n. The mai
n task is to desig
n the processi
ng tech
nology a
nd fixture desig
n of the CA6140 tailseat. Accordi
ng to the requireme
nts of the teachers' drawi
ngs, the process desig
n a
nd fixture desig
n are required. O
n the basis of masteri
ng the role of the parts, the process of the parts is a
nalyzed. For the desig
n of a give
n topic, the desig
n is mai
nly for machi
ne tool fixture desig
n. The clip is desig
ned for the purpose of e
nsuri
ng machi
ni
ng accuracy, productio
n efficie
ncy a
nd facilitati
ngworker operatio
n. At the begi
n
ni
ng of the desig
n, I co
nsulted the releva
nt data a
nd the literature about machi
ne tool jig at home a
nd abroad. At the same time, I a
nalyzed the structure a
nd tech
nology of the parts at the same time of u
ndersta
ndi
ng the part drawi
ngs, made clear the choice of the rough datum a
nd the fi
ne datum, determi
ned the machi
ni
ng allowa
nce a
nd the size of the bla
nk, thus determi
ned the process of the additio
n of the parts, a
nd calculated the cutti
ng of each process. The amou
nt a
nd time ofwork. Fi
nally, the fixture required for this desig
n is completed. Keywords：CA6140 tailstock, processi
ng tech
nology, fixture desig
n, cutti
ng parameter. 目录 摘要I Abstract II 前言1 第1章零件分析2 1.1零件类型及结构分析2 1.2零件主要技术要求分析2 1.3零件结构工艺性分析2 第2章机械加工工艺规程设计4 2.1毛坯选择4 2.2定位基准选择4 2.2.1粗基准选择4 2.2.2精基准选择5 2.3工艺路线拟定5 2.4工序顺序安排5 2.5工序尺寸计算6 2.5.1径向直径尺寸的工序尺寸计算6 2.5.2轴向长度尺寸的工序尺寸计算7 2.6切削加工基本时间计算8 第3章铣Φ35两端面夹具设计27 3.1定位分析27 3.2夹紧力计算27 3.3定位误差分析28 3.4绘制装配图28 结束语29 参考文献30