摘要 本次设计内容涉及了机械制造工艺及机床夹具设计、金属切削机床、公差配合与测量等多方面的知识。 多孔轴零件的工艺规程及钻孔的夹具设计是包括零件加工的工艺设计、工序设计以及专用夹具的设计三部分。在工艺设计中要首先对零件进行分析，了解零件的工艺再设计出毛坯的结构，并选择好零件的加工基准，设计出零件的工艺路线；接着对零件各个工步的工序进行尺寸计算，关键是决定出各个工序的工艺装备及切削用量；然后进行专用夹具的设计，选择设计出夹具的各个组成部件，如定位元件、夹紧元件、引导元件、夹具体与机床的连接部件以及其它部件；计算出夹具定位时产生的定位误差，分析夹具结构的合理性与不足之处，并在以后设计中注意改进。 关键词：工艺、工序、切削用量、夹紧、定位、误差。 ABSTRCT This desig
n co
nte
nt has i
nvolved the machi
ne ma
nufacture craft a
nd the e
ngi
ne bed jig desig
n, the metal-cutti
ng machi
ne tool, the commo
n differe
nce coordi
natio
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nd the survey a
nd so o
n the various k
nowledge. The reductio
n gear box body compo
ne
nts tech
nological process a
nd its the processi
ng hole jig desig
n is i
ncludes the compo
ne
nts processi
ng the tech
nological desig
n, the worki
ng procedure desig
n as well as the u
nit clamp desig
n three parts. Must first carry o
n the a
nalysis i
n the tech
nological desig
n to the compo
ne
nts, u
nderstood the compo
ne
nts the craft redesig
ns the semi fi
nished materials the structure, a
nd chooses the good compo
ne
nts the processi
ng datum, desig
ns the compo
ne
nts the craft route; After that is carryi
ng o
n the size computatio
n to a compo
ne
nts each labor step of worki
ng procedure, the key is decides each worki
ng procedure the craft equipme
nt a
nd the cutti
ng specificatio
ns; The
n carries o
n the u
nit clamp the desig
n, the choice desig
ns the jig each compositio
n part, like locates the part, clamps the part, guides the part, to clamp co
ncrete a
nd the e
ngi
ne bed co
n
nectio
n part as well as other parts; Positio
n error which calculates the jig locates whe
n produces, a
nalyzes the jig structure the ratio
nality a
nd the deficie
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nd will desig
n i
n later pays atte
ntio
n to the improveme
nt. Keywords: The craft, the worki
ng procedure, the cutti
ng specificatio
ns, clamp, the localizatio
n, the error. 目录 ABSTRCT 3 序言1 一机床夹具介绍2 1 .1夹具的现状及生产对其提出新的要求2 1.2现代夹具的发展方向2 二零件的分析4 2.1零件的作用4 2.2零件的工艺分析4 2.3确定零件的生产类型5 三确定毛坯类型绘制毛坯简图6 3.1选择毛坯6 3.2确定毛坯的尺寸公差和机械加工余量6 四工艺规程设计7 4.1定位基准的选择7 4.2拟定工艺路线7 4.3加工设备及工艺装备的选用9 4.4加工余量，工序尺寸及公差的确定10 4.5切削用量的计算10 4.5时间定额的计算11 五机床夹具的定位及夹紧13 5.1概述13 5.1.1机床夹具的概念13 5.1.2机床夹具的组成13 5.1.3机床夹具的分类14 5.1.4机床夹具在机械加工中的作用15 5.2工件的装夹方式16 5.3基准及其分类16 5.4工件的定位17 5.4.1工件定位的基本原理17 5.4.2常见定位方式及定位元件18 5.5工件的夹紧19 5.5.1夹紧装置的组成及基本要求19 5.5.2夹紧力的确定20 5.5.3典型夹紧结构20 5.5.4定心夹紧机构21 5.6专用夹具设计21 5.6.1对机床专用夹具的基本要求21 5.6.2专用夹具设计方法和步骤21 5.6.3夹具总图技术要求的制订22 六夹具设计23 6.1夹具设计任务23 6.2拟定夹具定位方案23 6.3绘制夹具装配图23 6.4定位误差分析24 6.5切削力和夹紧力计算25 6.6夹具设计及操作的简要说明26 总结27 致谢28 参考文献29