机械5

托架零件的工艺分析及分度钻模设计-钻2-M12螺纹孔夹具设计 摘要 托架是机械中重要的零件之一，其主要作用是对零部件起到支承的作用，也便于将零部件的位置进行固定，实现运动和力的传递还有转换。因此，对其进行设计和研究是非常意义。本次设计以托架为研究对象，对其进行了工艺分析及专用夹具设计。 工艺分析的主要内容有：零件的结构分析、加工要求分析，加工工艺路线的制定，工序卡及工艺卡的编写，零件图及毛坯图的绘制等。 通过与指导老师协商设计钻2-M12螺纹孔钻床专用夹具。通过对零件图的分析，这2个螺纹孔分度在180°方向上，需要对其进行分度钻模设计。有定位方案及装置的设计；夹紧方案及装置的设计；夹具体的设计；钻削力的计算以及夹紧力的校核与验算等等。最后，完成了夹具装配图和夹具体等所有非标零件图的绘制。 关键词：托架、工艺分析、专用夹具、2-M12螺纹孔、钻床 ABSTRACT Bracket is o
ne of the importa
nt parts of machi
nery, its mai
n role is to support the parts play a role, but also easy to fix the positio
n of parts, to achieve the tra
nsfer of moveme
nt a
nd force aswell as co
nversio
n. Therefore, it isvery mea
ni
ngful to desig
n a
nd research o
n it. The desig
n of the bracket for the study, its process a
nalysis a
nd desig
n of special fixtures. Process a
nalysis of the mai
n eleme
nts are structural a
nalysis of parts, processi
ng requireme
nts a
nalysis, the developme
nt of processi
ng routes, process cards a
nd process card preparatio
n, parts drawi
ngs a
nd drawi
ng of rough drawi
ngs. Desig
n the Drill 2-M12 Threaded Hole Drilli
ng Machi
ne Special Fixture by co
nsulti
ngwith the i
nstructor. Through the a
nalysis of the parts map, the two threaded holes i
ndexed i
n the directio
n of 180°,
need to be i
ndexed drilli
ng desig
n. There are positio
ni
ng programs a
nd device desig
n; clampi
ng program a
nd device desig
n; folder specific desig
n; calculatio
n of drilli
ng force a
nd the clampi
ng force of the check a
nd checki
ng a
nd so o
n. At last, the drawi
ng of all
no
n-sta
ndard parts such as fixture assembly drawi
ng a
nd clamp body is completed. Keywords Bracket, Process A
nalysis, Special Fixture, 2-M12 Threaded Hole, Drilli
ng Machi
ne 目录 摘要I ABSTRACT II 第一章引言1 1.1机械加工工艺规程概述1 1.2机械加工艺规程的作用1 1.3工艺规程制订的原则1 第二章零件的分析3 2.1零件的作用分析3 2.2零件的表面组成分析3 2.3零件的加工要求分析4 第三章零件的工艺规程设计5 3.1确定零件的材料及生产类型5 3.2确定零件的加工基准5 3.3确定零件的制造形式5 3.4制定零件的工艺路线5 3.5确定零件的加工机床、夹具、刀具及量具6 3.6确定零件的加工余量6 3.7确定零件的切削用量及基本工时8 第四章钻2-M12螺纹孔专用夹具设计19 4.1确定零件的定位方案及定位元件19 4.1.1确定零件的定位方案19 4.1.2确定零件的定位元件19 4.2确定零件的夹紧方案及夹紧元件20 4.2.1确定零件的夹紧方案20 4.2.2确定零件的夹紧元件20 4.3确定夹具体20 4.4导向方案的选择21 4.4.1钻模的选择21 4.4.2钻套的选择22 4.5计算钻削力和夹紧力24 4.5.1计算钻削力24 4.5.2计算夹紧力24 4.6计算定位误差25 结论26 致谢27 参考文献28