制动杠杆的加工工艺规程及钻14，M8底孔夹具设计 摘要 本设计是基于-制动杠杆零件的加工工艺规程及一些工序的专用夹具设计。-制动杠杆零件的主要加工表面是平面及孔系。一般来说，保证平面的加工精度要比保证孔系的加工精度容易。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系加工精度。基准选择以-制动杠杆的￠22E8孔作为基准，主要加工工序安排是先在后续工序中除个别工序外均用顶平面和工艺孔定位加工其他孔系与平面。整个加工过程均选用通用机床。夹具选用专用夹具，夹紧方式多选用手动夹紧，夹紧可靠，机构可以不必自锁，因此生产效率较高，适用于大批量、流水线上加工，能够满足设计要求。 关键词制动杠杆零件，加工工艺，夹具，定位，夹紧 Abstract： This desig
n is the special fixture for machi
ni
ng tech
nology for the middle fork parts a
nd process desig
n. Mai
n processi
ng surface of the middle fork parts is the pla
ne a
nd a series of hole. I
n ge
neral, e
nsure the machi
ni
ng accuracy of pla
ne tha
n to e
nsure the accuracy of the processi
ng easily. Therefore, the desig
n follows the surface after the first hole pri
nciple. A
nd the hole a
nd the pla
ne processi
ng clearly divided i
nto roughi
ng a
nd fi
nishi
ng stages to e
nsure machi
ni
ng precisio
n. Datum selectio
n to the beari
ng hole i
n the middle fork of the i
nput shaft a
nd output shaft as a rough be
nchmark, the top surface a
nd the two holes as a precisio
n tech
nology base. The mai
n process of machi
ni
ng tech
nology is first to support hole positio
ni
ng processi
ng the top pla
ne, a
nd the
n the top pla
ne a
nd the series of supporti
ng hole locatio
n hole processi
ng tech
nology. I
n additio
n to the follow-up processes are i
ndividual processeswith the top pla
ne positio
ni
ng tech
nology a
nd other processi
ng Ko
ng a
nd pla
ne. Processi
ng support holes usi
ng the coordi
nate bori
ng. Thewhole process selectio
n of machi
ne tool. The special fixture fixture, clampi
ng mea
ns more choice of p
neumatic clampi
ng, clampi
ng reliable, age
ncies ca
n
not self-locki
ng, therefore the productio
n efficie
ncy is high, suitable for large batch, li
ne processi
ng, ca
n meet the desig
n requireme
nts. Keywords： middle fork parts, processi
ng, special fixture, desig
n 目录 摘要I 1绪论2 2制动杠杆加工工艺规程设计4 2.1零件的分析4 2.1.1零件的作用4 2.1.2零件的工艺分析4 2.2制动杠杆加工的主要问题和工艺过程设计所应采取的相应措施5 2.2.1确定毛坯的制造形式5 2.3.1粗基准的选择5 2.3.2精基准的选择5 2.4制动杠杆加工主要工序安排6 2.2.3确定工艺路线6 2.2.4机械加工余量、工序尺寸及毛坯尺寸的确定10 2.2.5确定切削用量11 2.3小结22 3钻Φ14，M8底孔专用夹具设计24 3.1定位基准的选择24 3.2定位元件的设计24 3.3定位误差分析25 3.4钻削力与夹紧力的计算25 3.5钻套、衬套、钻模板及夹具体设计26 3.6夹紧装置的设计27 3.7夹具设计及操作的简要说明28 总结29 参考文献30 致谢31