机械5

轴承座的加工工艺及专用夹具设计 摘要 专用夹具在现在的机械加工过程中发挥着重要的作用，实现了加工件的定位和夹紧。本次设计研究的对象是轴承座。主要研究的内容包括零件的加工工艺设计及对铣38前端面工序做出专用夹具设计。 轴承座的典型的座架类零件，也是连接和安装轴承的重要基础件。其主要作用是为轴承提供安装和支撑。为轴承、轴以及机构或者机器的正常工作护航。在对加工工艺设计之前，首先完成了零件作用及零件图的分析，确定了零件的生产类型，制造方式及加工余量，绘制毛坯图。设计加工工艺路线，计算工序卡中涉及到的切削用量等。最后，完善了工艺卡及工序卡。 专用夹具设计的内容为：确定零件的定位方案；选取夹紧装置还有夹紧元件；对夹具体进行了设计和确定；为保证零件的加工精度，选取了对刀装置；对零件在装夹过程中的夹紧力和切削力进行计算等等。最后，完成专用夹具的夹具装配图还有所有非标准的零件图。 关键词：轴承座；加工工艺；专用夹具；切削用量；定位 Machi
ni
ng process of beari
ng housi
ng a
nd special fixture desig
n Abstract The special fixture plays a
n importa
nt role i
n the prese
nt machi
ni
ng process,which realizes the positio
ni
ng a
nd clampi
ng of theworkpiece. The research object of this desig
n is the beari
ng pedestal. The mai
n research co
nte
nts i
nclude the desig
n of machi
ni
ng process a
nd the desig
n of special fixture for milli
ng 38 fro
nt e
nd face. The typical seat frame parts of beari
ng housi
ng are also importa
nt basic parts for co
n
necti
ng a
nd i
nstalli
ng beari
ngs. Its mai
n fu
nctio
n is to provide i
nstallatio
n a
nd support for beari
ngs. Escort the
normal operatio
n of beari
ngs, shafts a
nd mecha
nisms or machi
nes. Before the desig
n of processi
ng tech
nology, the fu
nctio
n of parts a
nd the a
nalysis of part drawi
ng are completed. The productio
n type, ma
nufacturi
ng mode a
nd machi
ni
ng allowa
nce of parts are determi
ned, a
nd the bla
nk drawi
ng is draw
n. Desig
n the processi
ng route, calculate the cutti
ng parameters i
nvolved i
n the process card. Fi
nally, the process card a
nd process card are improved. The co
nte
nts of the special fixture desig
n are: determi
ne the positio
ni
ng scheme of the parts; select the clampi
ng device a
nd clampi
ng eleme
nts; desig
n a
nd determi
ne the clamp specifically; select the tool setti
ng device to e
nsure the machi
ni
ng accuracy of the parts; calculate the clampi
ng force a
nd cutti
ng force of the parts i
n the clampi
ng process. Fi
nally, complete the fixture assembly drawi
ng of special fixture a
nd all
no
n-sta
ndard part drawi
ng. Keywords: beari
ng block; processi
ng tech
nology; special fixture; cutti
ng parameters; positio
ni
ng 目录 摘要I Abstract II 引言部分1 1绪论2 1.1机床夹具的研究现状2 1.2现代机床夹具的发展方向2 2零件的作用、工艺分析及生产类型的确定4 2.1零件的作用分析4 2.2零件的工艺分析4 2.3零件生产类型的确定5 3零件的机械加工工艺规程设计6 3.1零件制造形式的确定6 3.2基准的选择6 3.3选择、比较和确定加工工艺路线6 3.4加工设备、夹具、刀具及量具的确定8 3.5机械加工余量的确定8 3.6确定切削用量及基本工时11 4铣38前端面专用夹具的设计29 4.1确定定位方案，选择定位元件29 4.2确定夹紧方案，选择夹紧元件29 4.3夹具体的设计29 4.4对刀装置—对刀块的选择29 4.5铣削力的计算29 4.6夹紧力的计算29 4.7定位误差的分析30 总结内容31 参考文献32 致谢33 附录34