机械5

基于proe的气门摇臂轴支座机械加工工艺规程及夹具设计 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气门摇臂轴支座。该零件是柴油机控制系统中不能缺少的零件之一，为柴油机能够调节气门以及正常工作提供保障。主要研究的内容包括零件的加工工艺设计、专用夹具以及夹具三维实体建模的设计。 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。 本次加工的零件设计钻Φ11孔钻床专用夹具。设计的内容为：确定零件的定位方案；选择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，选择对刀装置—钻套；对零件在装夹过程中的夹紧力和切削力进行计算等。利用Proe三维建模软件完成夹具的三维实体建模。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：气门摇臂轴支座；加工工艺；钻Φ11孔；专用夹具；Proe三维建模 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 thevalve rocker shaft support. This part is o
ne of the i
ndispe
nsable parts i
n the diesel e
ngi
ne co
ntrol system,which guara
ntees the diesel e
ngi
ne ca
n adjust thevalve a
nd
normalwork. The mai
n research co
nte
nts i
nclude the machi
ni
ng process desig
n of parts, special fixtures a
nd the desig
n of 3D solid modeli
ng of fixtures. 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. This machi
ned part is desig
ned to drill a special fixture forΦ11 hole drilli
ng machi
ne. The desig
n co
nte
nt is: determi
ne the positio
ni
ng scheme of the parts; select the clampi
ng device a
nd the clampi
ng compo
ne
nts; the specific desig
n a
nd determi
natio
n of the clamp; to e
nsure the machi
ni
ng accuracy of the parts, select the tool setti
ng device- the drill sleeve; The clampi
ng force a
nd cutti
ng force i
n the process are calculated. The 3D solid modeli
ng of the fixture is do
ne usi
ng Proe 3D modeli
ng software. Complete the fixture assembly drawi
ng for the dedicated fixture a
nd all
no
n-sta
ndard parts drawi
ngs. Keywords:valve rocker shaft beari
ng; machi
ni
ng process; drilli
ngΦ11 hole; special fixture; Proe 3D modeli
ng 目录 摘要I Abstract II 第1章绪论1 1.1本课题研究的目的及意义1 1.2机床夹具的研究现状1 1.3现代机床夹具的发展方向2 第2章零件的工艺分析3 2.1零件作用的分析3 2.2零件材料的分析4 2.3零件结构的分析4 2.4零件加工表面的分析4 2.5零件形位公差的分析5 第3章零件的机械加工工艺规程设计6 3.1零件生产类型的确定6 3.2零件制造形式的确定6 3.3基准的选择7 3.4选择、比较和确定加工工艺路线7 3.4.1选择加工工艺路线7 3.4.2比较加工工艺路线8 3.4.3确定加工工艺路线9 3.5加工设备、夹具、刀具及量具的确定9 3.6机械加工余量的确定9 3.7确定切削用量及基本工时11 第4章钻Ф11孔专用夹具的设计24 4.1确定定位方案，选择定位元件24 4.2确定夹紧方案，选择夹紧元件25 4.3夹具体的设计25 4.4对刀装置的选择27 4.5钻削力及夹紧力计算27 4.6定位误差分析28 结论29 致谢30 参考文献31