反向齿轮器箱体的加工工艺及钻底座M12螺纹底孔，锪Φ20孔夹具设计 摘要 本设计是反向齿轮器箱体零件的加工工艺规程及一些工序的专用夹具设计。反向齿轮器箱体零件的主要加工表面是平面及孔。一般来说，保证平面的加工精度要比保证孔的加工精度容易。因此，本设计遵循先面后孔的原则。并将孔与平面的加工明确划分成粗加工和精加工阶段以保证孔的加工精度。基准的选择以反向齿轮器箱体外圆面作为粗基准，以孔及其下表面作为精基准。先将底面加工出来，然后作为定位基准，在以底面作为精基准加工孔。整个加工过程选用通用机床。在夹具方面选用专用夹具。考虑到零件的结构尺寸简单，夹紧方式多采用手动夹紧，夹紧简单，机构设计简单，且能满足设计要求。 关键词反向齿轮器箱体零件，加工工艺，夹具，定位，夹紧 ABSTRACT This paper is to desig
n the craft processes of maki
ng the CA6140 lever spare parts a
nd some specialized to
ngs i
n the process. The CA6140 lever spare part primarily processes the surface a
nd bores. Ge
nerally speaki
ng, to guara
ntee the accuracy of the flat surface process is easier tha
n that of the bore. Therefore, this desig
n follows the pri
nciple that surface first a
nd the
n the bore, a
nd defi
nitely divides the process of flat surface a
nd bore i
nto coarse processes a
nd precise processes to guara
ntee the bore processes. The basic choice is to co
nsider outside circle as rough basis a
nd to co
nsider bore a
nd its
next surface as precise basis. The bottom is first processed out to be fixed positio
n basis, a
nd process the bore usi
ng the bottom as the precise basis. Thewhole processes choose the machi
ne bed. I
n the aspects of to
ngs choosi
ng, specialized to
ngs are used. I
n co
nsideratio
n of the simple co
nstructio
n size of the spare parts, clippi
ng by ha
nds is adopted. It is simple, a
nd the orga
nizatio
n desig
n is simple, a
nd ca
n satisfy the desig
n request. Key Words Lever spare parts, craft proces, to
ngs, fixed positio
n, tight clip 目录 摘要I ABSTRACT 2 1绪论4 1.1反向齿轮箱的用途4 1.2反向齿轮箱的技术要求4 1.3选择定位基准6 1.4制定零件加工工艺路线6 1.5切削计算8 2钻底座M12螺纹底孔锪20孔夹具设计11 2.1研究原始质料11 2.2定位基准的选择11 2.3切削力及夹紧力的计算11 2.4误差分析与计算12 2.5零、部件的设计与选用12 2.5.1定位销选用12 2.5.2夹紧装置的选用13 2.5.3钻套、衬套、钻模板设计与选用13 2.6夹具设计及操作的简要说明15 总结17 谢辞18 参考文献19