机械5

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弯管机底板支座。主要研究的内容包括弯管机底板支座的加工工艺设计及专用夹具的设计。其中专用夹具设计了钻2-Φ6孔钻床专用夹具。 弯管机主要的作用是对管材进行相应的弯曲，底板支座为弯管机上主要零部件的定位和工作提供支撑。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的内容为：确定零件的定位方案（满足6点定位原理）；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，设计了对刀装置（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非标准零件图。 关键词：弯管机底板支座；加工工艺；钻2-Φ6孔；夹具设计 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 base plate support of pipe be
nder. The mai
n research co
nte
nt i
ncludes the processi
ng tech
nology desig
n of the pipe be
nder base plate support a
nd the desig
n of the special fixture. Special fixture is desig
ned for drilli
ng 2-Φ 6 hole drilli
ng machi
ne. The mai
n fu
nctio
n of the pipe be
nder is to be
nd the pipe accordi
ngly, a
nd the base plate support provides support for the positio
ni
ng a
ndwork of the mai
n parts o
n the pipe be
nder. 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 desig
n co
nte
nts of the parts are: determi
ne the positio
ni
ng scheme of the parts(meet the 6-poi
nt positio
ni
ng pri
nciple); select the clampi
ng device a
nd clampi
ng eleme
nt; desig
n a
nd determi
ne the clamp; desig
n the tool setti
ng device(drill sleeve) 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
no
n-sta
ndard part drawi
ng. Keywords: pipe be
nder base plate support; processi
ng tech
nology; drilli
ng 2-Φ 6 hole; fixture desig
n 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章零件的机械加工工艺规程设计3 2.1零件的工艺分析及生产类型的确定3 2.1.1零件的作用3 2.1.2零件材料的分析4 2.1.3零件表面结构的分析4 2.1.4零件加工要求的分析4 2.1.5零件形位公差的分析4 2.1.6零件生产类型的确定5 2.2零件工艺规程设计5 2.2.1零件制造形式的确定5 2.2.2基准的选择6 2.3选择、比较和确定加工工艺路线6 2.3.1选择加工工艺路线7 2.3.2比较加工工艺路线8 2.3.3确定加工工艺路线8 2.4加工设备、夹具、刀具及量具的确定8 2.5机械加工余量的确定9 2.6确定切削用量及基本工时11 第3章钻床专用夹具的设计24 3.1确定定位方案，选择定位元件24 3.2确定夹紧方案，选择夹紧元件25 3.3夹具体的设计25 3.4对刀装置的选择25 3.5钻削力及夹紧力计算25 3.6定位误差分析26 第4章加工程序编制及仿真加工27 4.1数控编程的分类27 4.2数控编程27 4.2.1创建几何体28 4.2.2创建刀具30 4.2.3面铣削加工操作30 4.2.4型腔铣加工设置33 4.3仿真加工及后处理35 结论41 致谢42 参考文献43