机械5

目录 目录1 引言3 1零件的工艺分析4 1.1零件图4 1.2工艺分析4 2毛坯的确定4 2.1零件毛坯制造形式4 2.1.1确定加工余量5 2.1.2毛坯基本尺寸5 2.2毛坯图5 2.3定位基准的选择6 3工艺路线方案确定6 4切削用量的计算8 5夹具设计23 5.1问题的提出23 5.2定位方案23 5.3定位元件24 5.4定位误差计算24 5.5夹紧机构设计24 参考文献27 致谢28 摘要 换挡叉它位于变速机构中主要起换档，和其他零件配合，在改变转速的时候承受轻微的载荷，所以加工时应该保证本零件的重要工作表面符合技术要求。对于零件而言，尽可能选择不加工表面作为粗基准。通过工艺分析寻找最科学经济的加工工艺方法来保证零件尺寸精度，同时有效的减少工件加工的基本时间和辅助时间提高零件的生产效率，轻劳动强度以及保证生产安全，提高产品零件的加工质量。本次设计中包括了对换挡叉零件图的分析，毛坯的选择，制订加工路线，刀具的选择，切削用量的计算，工艺文件的填写。 关键词：工艺分析加工路线切削用量 Abstract The gear shifti
ng plug is located i
n the gear shifti
ng mecha
nism a
nd is mai
nly e
ngaged with other parts to bear a slight load whe
n cha
ngi
ng the rotatio
n speed. therefore, the importa
nt worki
ng surface of this part should be e
nsured to meet the tech
nical requireme
nts duri
ng processi
ng. As for parts, as far as possible, select
no
n-machi
ned surfaces as coarse be
nchmarks. Through process a
nalysis, the most scie
ntific a
nd eco
nomic processi
ng method ca
n be fou
nd to e
nsure the dime
nsio
nal accuracy of parts. at the same time, the basic time a
nd auxiliary time for workpiece processi
ng ca
n be effectively reduced to improve the productio
n efficie
ncy of parts, reduce labor i
nte
nsity, e
nsure productio
n safety, a
nd improve the processi
ng quality of product parts. This desig
n i
ncludes the a
nalysis of the gear shifti
ng a
nd i
nserti
ng parts drawi
ng, the selectio
n of bla
nks, the formulatio
n of processi
ng routes, the selectio
n of cutti
ng tools, the calculatio
n of cutti
ng parameters, a
nd the filli
ng of process docume
nts. Key words： Process a
nalysis Machi
ni
ng route Cutti
ng parameters