机械5

十字头滑套的钻14XΦ22孔夹具设计及机械加工工艺规程装备 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。 夹具主要依据零件的加工要求来设计的。夹具应满足零件加工工序的精度要求、加工生产率要求，并保证操作方便、安全及使用寿命和较低的夹具制造成本。本课题设计的题目是十字头滑套的机械工艺规程及加工14X22孔夹具设计。十字头滑套，十字头滑套位于轴的端部，连接轴与下一级的传动部件，起到传递扭矩与动力的作用。 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等。 关键词：夹具、十字头滑套、工艺规程、14XΦ22 Abstract Jig is the 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 use a
nd qua
ntity of fu
nctio
nal compo
ne
nts. With the cha
nge of the size of parts, more a
nd more fixtures are elimi
nated. Therefore, it is
necessary to desig
n a set of special fixtures. Whe
n desig
ni
ng the special fixture,we should co
nsider the positio
ni
ng scheme of theworkpiece, the clampi
ng scheme of theworkpiece a
nd the desig
n of the clampi
ng mecha
nism, other parts of the fixture, the structure of the fixture a
nd so o
n. The fixture is mai
nly desig
ned accordi
ng to the processi
ng requireme
nts of parts. Fixture should meet the precisio
n requireme
nts of parts processi
ng procedures, processi
ng productivity requireme
nts, a
nd e
nsure easy operatio
n, safety a
nd service life a
nd lower jig ma
nufacturi
ng costs. The topic of this project is the mecha
nical process regulatio
ns of crosshead slider a
nd the desig
n of 14XΦ22 hole fixture. The cross head slidi
ng sleeve is located at the e
nd of the shaft, co
n
necti
ng the shaftwith the tra
nsmissio
n parts of the
next stage, playi
ng the role of tra
nsmitti
ng torque a
nd power. At the begi
n
ni
ng of the desig
n, I co
nsulted the releva
nt data a
nd the domestic a
nd foreig
n literature about the machi
ne tool fixture, a
nalyzed the structure a
nd process of the partwhile readi
ng the part drawi
ng, made clear the choice of the rough datum a
nd the precisio
n datum, determi
ned the machi
ni
ng allowa
nce of the part a
nd the size of the bla
nk, thus determi
ned the processi
ng process of the part a
nd calculated the cutti
ng process of eachworki
ng procedure. Dosage a
ndworki
ng hours. Keywords jig, crosshead slip sleeve, process specificatio
n, 14X22 目录 摘要I Abstract II 第1章绪论3 1.1机床夹具的概述3 1.2机床夹具的分类3 1.3机床夹具的发展方向4 1.4机床夹具在机械加工中的作用5 1.5夹具设计的特点和基本要求5 1.5.1夹具设计的特点5 1.5.2设计的基本要求6 第2章零件机械加工工艺规程设计7 2.1零件的作用、设计基准及技术要求7 2.1.1零件的作用7 2.1.2零件的设计基准7 2.1.3零件的组成表面7 2.2零件的技术要求8 2.3零件的机械加工工艺性、材质及热处理要求8 2.3.1零件的机械加工工艺性8 2.3.2零件的材质8 2.3.3零件的热处理要求8 2.4基准的选择及加工方案的选择与确定8 2.4.1基准的选择8 2.4.2加工方案确定9 2.5毛坯尺寸及工艺尺寸的确定10 2.5.1毛坯尺寸的确定10 2.5.2工艺尺寸的确定11 2.6确定切削用量及基本工时12 第3章专用夹具设计24 3.1定位方案及定位元件的确定与选择24 3.2夹紧方案及装置的确定与选择25 3.3夹具体的确定25 3.4导向装置的确定26 3.5钻削力的计算26 第4章结论27 致谢28 参考文献29