机械5

本体盖的加工工艺规程及钻、攻6-M8和5-M10螺纹孔夹具设计 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。 本体盖及其钻、攻6-M8和5-M10螺纹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：切削用量夹紧定位误差。 Abstract This desig
n i
nvolves the mecha
nical ma
nufacturi
ng process a
nd machi
ne tool fixture desig
n, metal cutti
ng machi
ne tools, tolera
nce a
nd measureme
nt ofvarious aspects of k
nowledge. Body cover a
nd drilli
ng, tappi
ng 6-M8 a
nd 5-M10 threaded hole fixture desig
n i
ncludes parts processi
ng process desig
n, process desig
n a
nd special fixture desig
n three parts. I
n the process of desig
n should first u
ndersta
nd the a
nalysis of parts, parts of the process to desig
n a bla
nk structure, a
nd choose the good compo
ne
nts the processi
ng datum, desig
ns the process routes of the parts; the
n the parts of each labor step process size calculatio
n, is the key to decide the craft equipme
nt a
nd the cutti
ng process of thevarious desig
n parameters; the
n a special fixture, the fixture selectio
n for thevarious compo
ne
nts of the desig
n, such as co
n
necti
ng parts positio
ni
ng eleme
nts a
nd clampi
ng eleme
nts, guide eleme
nt, fixture a
nd machi
ne tool a
nd other compo
ne
nts; positio
ni
ng error is calculatedwhe
n the fixture, a
nalysis the ratio
nality a
nd shortcomi
ng of fixture structure, improve a
nd desig
n i
n later. Keywords cutti
ng amou
nt clampi
ng positio
ni
ng error. 目录 前言1 1概述发展2 1.1机床夹具简介2 1.1.1机床夹具的主要功能2 1.1.2机床夹具的组成2 1.1.3夹具设计的步骤和基本要求2 2本体盖的加工工艺规程设计8 2.1本体盖的作用8 2.2零件的工艺分析8 2.3基面的选择8 2.3.1粗基准的选择原则9 2.3.2精基准选择的原则9 2.4制定工艺路线9 2.5确定各工序的加工余量、计算工序尺寸及公差10 2.6确定切削用量及基本工时12 3专用夹具设计25 3.1问题提出25 3.2定位基准的选择25 3.3定位元件的设计25 3.4定位误差分析25 3.5切削力的计算与夹紧力分析27 3.6钻套设计27 结束语30 谢辞31 参考文献32