CA6140车床拨叉831006的铣φ40上端面夹具设计及加工工艺装备含非标5张CAD图.zip

I摘 要本设计是车床拨叉零件的加工工艺及专用夹具设计。 从零件的结构外型分析，它的外型复杂，且不易加工，因此该零件选用是铸造件。它的主要加工面是孔、拨叉叉口两端面和槽，在加工中由于面的加工精度要比孔的加工精度容易保证。因此，在设计中采用先面后孔的原则，并将孔与平面的加工划分为粗加工和精加工阶段，以保证加工精度。在本设计中，先以一个面加工出一个基准面，然后，再以该基准面加工相应的孔。在后面的工序中，均以该孔为定位基准，加工拨叉叉口两端面、孔、底平面、槽和斜平面，在整个加工过程中，分别采用了铣床、钻床和镗床。并设计了铣40 上端面的专用夹具。由于该零件的尺寸不大，所需的夹紧力不大。因此，夹紧方式都采用手动夹紧，它的夹紧简单，机构的设计更为方便，满足夹紧要求。关键词 拨叉零件，加工工艺，专用夹具，定位， 夹紧IIABSTRACT This design is the processing technology and special fixture design of lathe shift fork parts. From the analysis of the structural appearance of the part, it is found that its appearance is complex and difficult to process, so the part is selected as a casting. Its main machining surfaces are the two end faces and grooves of the hole and fork mouth, and the machining accuracy of the surface is easier to ensure than the machining accuracy of the hole. Therefore, the principle of surface before hole is adopted in the design, and the machining of holes and planes is divided into rough machining and finishing stages to ensure mac