机械5

减速机外壳加工工艺及夹具设计 摘要 现代化的机械行业结构变化很大，对于加工单位来说设计工艺水平对他们的影响是非常关键的。夹具行业的发展是非常快的，本次研究的零件是是减速机外壳。其主要设计内容有2部分：零件加工工艺的编制及专用夹具设计。 一开始对零件机械进行分析，之后将毛坯的加工形式确定下来，确定工艺路线，还有将机械加工余量，切削余量等等都定下来。用绘图软件绘制零件图以及毛坯图。 本次专用夹具对钻4-Ф6.5孔进行设计。设计专用夹具的时候，将定位的办法，还有夹紧办法都定下来，确定下来定位零部件，夹紧零部件，确定导向装置等等。将切削力和夹紧力的数值算出来。最后，将装配图还有非标零件图，通过AutoCAD全部画出。 关键词：减速机外壳、加工工艺、专用夹具、钻4-Ф6.5 ABSTRACT The structure of the moder
n machi
nery i
ndustry has cha
nged greatly. For the processi
ng u
nits, the i
nflue
nce of the desig
n process level o
n them isvery critical. The developme
nt of the fixture i
ndustry isvery fast. The parts studied this time are the reducer housi
ngs. The mai
n desig
n co
nte
nt co
nsists of two parts the preparatio
n of parts processi
ng tech
nology a
nd the desig
n of special fixtures. At the begi
n
ni
ng of the a
nalysis of the parts of the machi
ne, after the rough form of processi
ng to determi
ne, determi
ne the process route, aswell as the machi
ni
ng allowa
nce, cutti
ng allowa
nce, etc. are fixed. Use drawi
ng software to draw part drawi
ngs a
nd bla
nk drawi
ngs. This special fixture is desig
ned to drill 4-Ф6.5 holes. Whe
n desig
ni
ng a special fixture, the positio
ni
ng method a
nd the clampi
ng method are all fixed, the positio
ni
ng of the parts is determi
ned, the parts are clamped, the guide device is determi
ned, a
nd the like. Calculate the cutti
ng force a
nd clampi
ng forcevalues. Fi
nally, there are
no
n-sta
ndard parts drawi
ngs for the assembly drawi
ngs, all draw
n through AutoCAD. Keywords reducer housi
ng, machi
ni
ng process, special fixture, drill 4- 6.5 目录 摘要I ABSTRACT II 1零件的工艺性分析1 1.1零件的分析1 1.1.1零件的组成表面分析1 1.1.2零件的技术要求分析1 1.1.3零件的形位公差分析1 1.2零件的作用2 1.3零件的工艺性审查2 1.4确定零件的生产类型2 2拟定零件工艺路线及确定毛坯3 2.1选择定位基准3 2.1.1粗基准的选择3 2.1.2精基准的选择3 2.2工艺过程设计中应考虑的主要问题3 2.2.1加工方法选择的原则3 2.2.2加工阶段的划分4 2.2.3工序的合理组合5 2.3制定工艺路线5 2.4零件毛坯的确定6 2.5机床、夹具、刀具及量具的确定6 2.6零件加工余量的确定7 2.7切削用量及时间定额的计算10 3钻4-Ф6.5孔专用夹具设计30 3.1机床夹具简介30 3.2问题的提出30 3.3选择定位方案和定位元件30 3.4选择夹紧方案和夹紧元件31 3.5夹具体的设计31 3.6导向装置选择32 3.7切削力计算32 3.8夹紧力计算33 3.9定位误差分析33 结论35 致谢36 参考文献37