机械5

钢板弹簧支架工艺与夹具设计 摘要 本设计是基于钢板弹簧支架零件的加工工艺规程及一些工序的专用夹具设计。钢板弹簧支架零件的主要加工表面是外圆及孔系。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。主要加工工序安排是先以孔系定位加工出平面，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。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：钢板弹簧支架类零件；工艺；夹具； ABSTRACT The desig
n is based o
n the body parts of the processi
ng order of the processes a
nd some special fixture desig
n. Body parts of the mai
n pla
ne of the surface a
nd pore system. I
n ge
neral, the pla
ne guara
ntee processi
ng precisio
n tha
n that of holes machi
ni
ng precisio
n easy. Therefore, this desig
n follows the surface after the first hole pri
nciple. Pla
ne with holes a
nd the processi
ng clearly divided i
nto roughi
ng a
nd fi
nishi
ng stages of holes to e
nsure machi
ni
ng accuracy. Datum selectio
n box i
nput shaft a
nd the output shaft of the supporti
ng hole as a rough be
nchmark, with top with two holes as a precisio
n tech
nology refere
nce. Mai
n processes arra
ngeme
nts to support holes for positio
ni
ng a
nd processi
ng the top pla
ne, a
nd the
n the top pla
ne a
nd the supporti
ng hole locatio
n hole processi
ng tech
nology. I
n additio
n to the follow-up processes i
ndividual processes are made of the top pla
ne a
nd tech
nological hole locatio
n hole a
nd pla
ne processi
ng. Supported hole processi
ng usi
ng the method of coordi
nate bori
ng. The whole process of processi
ng machi
ne combi
natio
ns were selected. Selectio
n of special fixture fixture, clampi
ng mea
ns more choice of p
neumatic clampi
ng, clampi
ng reliable, i
nstitutio
ns ca
n
not be locked, so the productio
n efficie
ncy is high, suitable for large batch, li
ne processi
ng, ca
n meet the desig
n requireme
nts. Key words: A
ngle gear seat parts; fixture; 目录 摘要II ABSTRACT III 第1章绪论1 1.1夹具简介1 1.2夹具的发展趋势1 1.3本次设计的内容2 1.4机床夹具的功能2 第2章加工工艺规程设计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钢板弹簧支架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孔和平面的加工顺序5 2.2.2加工方案选择5 2.3钢板弹簧支架加工定位基准的选择6 2.3.1粗基准的选择6 2.3.2精基准的选择6 2.4钢板弹簧支架加工主要工序安排7 2.5机械加工余量、工序尺寸及毛坯尺寸的确定9 2.6选择加工设备及刀、量具9 2.7确定切削用量及基本工时（机动时间） 10 第3章加工钢板弹簧支架车床夹具设计22 3.1车床夹具设计要求说明22 3.2车床夹具的设计要点22 4.2.3切削力及夹紧力的计算24 3.3定位机构26 3.4夹紧机构26 3.5零件的车床夹具的加工误差分析26 3.6确定夹具体结构尺寸和总体结构27 3.7零件的车床专用夹具简单使用说明29 结论30 参考文献31 致谢33