机械5

摘要 本设计是基于分离叉零件的加工工艺规程及一些工序的专用夹具设计。分离叉零件的主要加工表面是平面和孔系。一般来说，保证平面的加工精度要比保证加工精度容易。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，以保证加工精度。主要加工工序是第一个支持孔定位加工出顶平面，然后顶平面和孔的位置的孔加工工艺配套系列。在后续工序中除与顶平面定位技术和加工其他孔与平面的个体的过程。一般整个工艺的选择。专用夹具的夹具，夹紧方式多选用手动夹紧，夹紧可靠，机构不能自锁，因此生产效率高，适合于大批量、流水线上加工，能够满足设计要求。 关键词：分离叉类零件；工艺；夹具； ABSTRACT This desig
n is the special fixture for machi
ni
ng process of automobile shift lever parts a
nd process desig
n based o
n. The mai
n processi
ng surface steeri
ng lever parts of the pla
ne a
nd the holes. I
n ge
neral, the pla
ne guara
ntee precisio
n machi
ni
ng is easier tha
n to guara
ntee the machi
ni
ng accuracy. 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 of processi
ng to e
nsure accuracy. The mai
n process is the first locati
ng hole processi
ng the top pla
ne, a
nd the
n the hole processi
ng tech
nology series top pla
ne a
nd the positio
n of the hole. Process i
n additio
n to i
ndividual a
nd the top pla
ne positio
ni
ng tech
nology a
nd other processi
ng of the hole a
nd the pla
ne is i
n i
n the follow-up process. By usi
ng the coordi
nate bori
ng hole. I
n ge
neral the whole process selectio
n. Fixture fixture, clampi
ng mea
ns more choice of p
neumatic clampi
ng, clampi
ng reliable, age
ncies ca
n
not lock, 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: chemical pipe parts; tech
nology; fixture; 目录 摘要II ABSTRACT III 第1章机械加工工艺规程设计2 1.1零件的分析2 1.1.1零件的作用2 1.1.2零件的工艺分析2 1.2分离叉加工的主要问题和工艺过程设计所应采取的相应措施3 1.2.1孔和平面的加工顺序3 1.2.2孔系加工方案选择3 1.3分离叉加工定位基准的选择3 1.3.1粗基准的选择3 1.3.2精基准的选择3 1.4分离叉加工主要工序安排4 1.5机械加工余量、工序尺寸及毛坯尺寸的确定5 1.6毛坯种类的选择6 1.7选择加工设备和工艺装备6 1.7.1机床选用6 1.7.2选择刀具7 1.7.3选择量具7 1.8机械加工余量、工序尺寸及毛坯尺寸的确定7 1.9确定切削用量及基本工时（机动时间） 8 1.10时间定额计算及生产安排14 第2章分离叉内侧面铣夹具设计16 2.1研究原始质料16 2.2定位基准的选择16 2.3切削力及夹紧分析计算16 2.4误差分析与计算17 2.5零、部件的设计与选用18 2.5.1定位销选用18 2.5.2定向键装置设计19 2.6夹具设计及操作的简要说明20 总结22 参考文献23 致谢24