机械5

挂钩组件的加工工艺及钻φ13和2-φ8.5两通孔夹具设计 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。 挂钩组件1工艺规程及其钻2-Φ8.5锪沉孔Φ13的工装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：挂钩组件；工艺规程；夹具设计；工序；专用夹具 Abstract This desig
n i
nvolves mecha
nical ma
nufacturi
ng tech
nology a
nd machi
ne tool fixture desig
n, metal cutti
ng machi
ne tools, tolera
nce fit a
nd measureme
nt a
nd other aspects of k
nowledge. The tech
nological specificatio
n of hook 1 a
nd the fixture desig
n of its drilli
ng 2-8.5 cou
ntersi
nk hole 13 are composed of three parts the tech
nological desig
n of parts processi
ng, the process desig
n a
nd the desig
n of special fixture. I
n the process desig
n,we must first a
nalyze the parts, u
ndersta
nd the process of the parts, the
n desig
n the structure of the bla
nk, a
nd select the processi
ng be
nchmark of the parts, the
n desig
n the process route of the parts. The desig
n of special fixture is carried out, a
nd each compo
ne
nt of fixture is selected, such as positio
ni
ng compo
ne
nt, clampi
ng compo
ne
nt, guidi
ng compo
ne
nt, co
n
necti
ng compo
ne
nt betwee
n fixture a
nd machi
ne tool, a
nd other compo
ne
nts; the positio
ni
ng error caused by fixture positio
ni
ng is calculated, the ratio
nality a
nd shortcomi
ngs of fixture structure are a
nalyzed, a
nd the
notes i
n future desig
n are give
n. It is i
nte
nded to be improved. Keywords hook assembly; process pla
n
ni
ng; fixture desig
n; process; special fixture 目录 绪论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挂钩组件的加工工艺规程设计8 2.1挂钩组件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8 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11 3专用夹具设计20 3.1问题的提出20 3.2定位基准的选择20 3.3定位误差的分析与计算20 3.3.1定位误差的分析20 3.3.2定位误差计算21 3.4夹紧力的确定21 3.5钻套的设计22 3.6夹具设计及操作简要说明23 结束语25 谢辞26 参考文献27