摘要 拨叉的加工质量将直接影响机器的性能和使用寿命。本次设计旨在提高CA6140车床拨叉的加工效率，由此我们首先对拨叉的结构特征和工艺进行了仔细的分析，然后确定了一套合理的加工方案，加工方案要求简单，操作方便，并能保证零件的加工质量。在制定加工工艺规程的顺序如下： 1、分析零件； 2、选择毛坯； 3、设计工艺规程：包括制定工艺路线，选择基准面等； 4、工序设计：包括选择机床，确定加工余量，工序尺寸毛坯尺寸，确定切削用量及计算基本工时等； 5、编制工艺文件。 此外，为了提高劳动生产率，降低劳动强度，保证加工质量，需设计专用夹具，以满足加工过程的需要。 关键词：拨叉;工艺规程;夹具设计 Abstract Bocha the processi
ng machi
nes will directly affect the quality of the performa
nce a
nd service life. This desig
n seeks to i
ncrease the Bocha CA6140 lathe processi
ng efficie
ncy, which we first Bocha of the structural features a
nd a careful a
nalysis, a
nd the
n determi
ne a reaso
nable processi
ng programme, processi
ng programme requires simple, easy to operate, A
nd to e
nsure that parts of the processi
ng quality. I
n formulati
ng a poi
nt of order processi
ng the order is as follows: 1, a
nalysis of compo
ne
nts; 2, the choice of rough; 3, the desig
n of a poi
nt of order: i
ncludi
ng the developme
nt of routes, such as base-level choice; 4, the desig
n process: i
ncludi
ng the choice of machi
ne tools to determi
ne Jiago
ngyulia
ng, process size, Rough size, determi
ne the amou
nt a
nd terms of cutti
ng the basic worki
ng hours; 5, the preparatio
n of docume
nts I
n additio
n, i
n order to raise labor productivity a
nd reduce labor i
nte
nsity, the quality assura
nce process, the
need for fixture desig
n to meet the processi
ng
needs Key words: Bocha; process of order; fixture desig
n 目录 摘要2 1.零件分析5 1.1零件的作用5 1.2零件的工艺分析5 2.工艺规程设计5 2.1毛坯的制造形式5 2.2基准面的选择6 2.2.1粗基准的选择6 2.2.2精基准的选择6 2.3制定工艺路线7 3.绘制零件图和编制工艺文件25 3.1绘制零件图25 3.2编制工艺文件25 4.夹具设计27 4.2.1定位基准的选择27 4.2.2 1．夹具设计任务27 结论29 致谢30 参考文献31