机械5

轴承座的加工工艺及专用夹具设计-钻2-Φ4孔 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钻2-Φ4孔钻床专用夹具的设计。 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（钻套）；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；钻2-Φ4孔；专用夹具；设计 Machi
ni
ng process of beari
ng housi
ng a
nd special fixture desig
n- drilli
ng 2-Φ4 hole Abstract Special fixtures play a
n importa
nt role i
n the curre
nt machi
ni
ng process, e
nabli
ng the positio
ni
ng a
nd clampi
ng of theworkpiece. The object of this desig
n study is the beari
ng housi
ng. The mai
n research co
nte
nts i
nclude the desig
n of the machi
ni
ng process of the parts a
nd the desig
n of the special fixture for drilli
ng the 2-Φ4 hole drilli
ng machi
ne. The typical frame parts of the housi
ng are also a
n importa
nt part of the co
n
nectio
n a
nd mou
nti
ng of the beari
ng. Its mai
n role is to provide mou
nti
ng a
nd support for the beari
ngs. Escort for the
normal operatio
n of beari
ngs, shafts a
nd mecha
nisms or machi
nes. Before desig
ni
ng the machi
ni
ng process, the fu
nctio
n of the parts a
nd the a
nalysis of the parts drawi
ngswere first completed, a
nd the productio
n type, ma
nufacturi
ng method a
nd machi
ni
ng allowa
nce of the partswere determi
ned, a
nd the bla
nk drawi
ngwas draw
n. Desig
n the processi
ng route, calculate the amou
nt of cutti
ng i
nvolved i
n the process card, a
nd so o
n. Fi
nally, the process card a
nd process card have bee
n improved. The co
nte
nt of the special fixture desig
n is: determi
ne the positio
ni
ng scheme of the part; select the clampi
ng device a
nd the clampi
ng compo
ne
nt; desig
n a
nd determi
ne the specific clamp; to e
nsure the machi
ni
ng accuracy of the part, the tool setti
ng device(drill sleeve) is selected; The clampi
ng force a
nd cutti
ng force of the part duri
ng the clampi
ng process are calculated a
nd so o
n. Fi
nally, complete the fixture assembly drawi
ng for the dedicated fixture a
nd all
no
n-sta
ndard parts drawi
ngs. Keywords：beari
ng seat; machi
ni
ng process; drilli
ng 2-Φ4 hole; special fixture; desig
n 目录 摘要I Abstract II 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钻2-Ф4孔专用夹具的设计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—钻套的选择30 4.5钻削力的计算30 4.6夹紧力的计算30 4.7定位误差的分析31 参考文献33 致谢34 附录35