机械5

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。 轴支架零件的工艺规程及其钻2-Ф12孔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：轴支架、夹具设计、工艺路线。 Abstract The desig
n co
nte
nt of the mecha
nical ma
nufacturi
ng tech
nology a
nd machi
ne tool fixture desig
n, metal cutti
ng machi
ne tool, tolera
nce matchi
ng a
nd measureme
nt of aspects of k
nowledge. Shaft bracket parts of process pla
n
ni
ng a
nd its 2-Ф 12 holes of fixture desig
n is i
ncludi
ng parts processi
ng process desig
n, process desig
n a
nd special fixture desig
n three parts. Should first a
nalyze the parts i
n the process desig
n, u
ndersta
nd parts of tech
nology to desig
n the structure of bla
nk, a
nd choose the good parts processi
ng be
nchmark, desig
n process of the parts; The
n the parts size of eachwork step of the process, the key is to determi
ne the process equipme
nt for each process a
nd cutti
ng parameter; For the desig
n of special fixture, the
n select desig
n out of the compo
ne
nt parts of the fixture, such as the positio
ni
ng device, clampi
ng device, led compo
ne
nts, specific co
n
nectio
nwith machi
ne parts a
nd other parts; Calculated at the exit of fixture locati
ng positio
n error, a
nalysis the ratio
nality of the fixture structure a
nd deficie
ncy, a
nd pay atte
ntio
n to the improveme
nt i
n the later desig
n. Keywords : Shaft bracket, fixture desig
n, process route. 目录 摘要I Abstract II 1概述发展1 1.1机床夹具的主要功能1 1.2机床夹具的组成1 1.3夹具设计的步骤和基本要求1 2工艺规程设计7 2.1毛坯的制造形式7 2.2零件分析7 2.3基面的选择7 2.3.1粗基准的选择原则7 2.3.2精基准选择的原则8 2.4制定工艺路线8 2.5确定各工序的加工余量及公差9 2.6确定切削用量及基本工时10 3钻床夹具设计19 3.1定位机构19 3.2夹紧机构19 3.3导向装置的选择21 3.4机床夹具的总体形式23 3.4.1确定夹具体23 3.4.2确定联接体24 3.5绘制夹具装配图24 4定位误差设计27 4.1误差分析27 4.1.1定位误差27 4.1.2产生定位误差的原因27 4.2定位误差的计算28 总结30 致谢31 参考文献32