机械5

CA6140车床主轴法兰加工工艺和3-Φ12孔的夹具设计 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。 CA6140车床主轴法兰加工工艺规程及专用钻床夹具的设计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：CA6140车床主轴法兰、夹具设计、工艺路线 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 desig
n of the desig
n of the fixture for the machi
ni
ng of the spi
ndle fla
nge of the CA6140 lathe is three parts, i
ncludi
ng the process desig
n, the process desig
n a
nd the desig
n of the special fixture. I
n the process desig
n, the parts are a
nalyzed first, the process of the parts is redesig
ned a
nd the structure of the bla
nk is redesig
ned. The process datum of the parts is selected a
nd the process route of the part is desig
ned. The
n the size calculatio
n of theworki
ng procedure of the parts is calculated, the key is to determi
ne the process equipme
nt a
nd the cutti
ng amou
nt of thevariousworki
ng order; the
n, the key is to determi
ne the amou
nt of the process equipme
nt a
nd the cutti
ng amou
nt. The desig
n of the special fixture is carried out, a
nd the compo
ne
nts of the fixture are desig
ned, such as the positio
ni
ng eleme
nt, the clampi
ng eleme
nt, the guidi
ng eleme
nt, the co
n
necti
ng partswith the machi
ne tool a
nd the other parts. The positio
ni
ng error is calculatedwhe
n the fixture is positio
ned, a
nd the ratio
nality a
nd i
nadequacies of the fixture structure are a
nalyzed, a
nd the desig
n is i
njected i
n the future. It is i
nte
nded to be improved. Keywords: CA6140 lathe spi
ndle fla
nge, fixture desig
n, process route 目录 摘要I Abstract II 第一章概述发展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 第二章零件的分析8 2.1零件的作用8 2.2零件的工艺分析8 第三章工艺规程设计10 3.1毛坯的确定10 3. 2确定铸件加工余量10 3.3定位基准的选择12 3.3.1选择粗基准12 3.3.2选择精基准13 3.4制定机械加工工艺路线13 第四章确定切削用量15 第五章钻床专用夹具33 5.1问题的提出33 5.2夹具设计33 5.2.1定位基准选择33 5.2.2切削力及夹紧力计算33 5.3定位误差分析34 5.4导向装置的选择35 致谢39 参考文献40