毕业设计摘要 护罩冲压工艺及模具设计.docVIP

机械 毕业设计 论文 课程设计 ????????????????????????????????? 摘 要 ? ? 全文对护罩的工艺分析确定与模具设计进行具体的论证设计。通过工艺分析确定需要设计三套模具，分别是落料冲孔复合模具、弯曲模具和提手弯曲模具。?根据工艺分析与确定，第一套模具先进行落料冲孔，相应的设计出落料冲孔复合模具。从产品零件图看出需要冲出的孔的形状比较复杂，属于不规则孔。产品零件外形尺寸较大，所以设计的是一个大的，凸模和凸凹模形状都比较复杂的模具出来。对冲小孔的凸模进行强度校核。?工件的第二道工序需要弯曲的是个3/4圆桶形状，跟一般的工件有很多不一样的地方，这样就给模具的设计带来了一定的难题。考虑到卸料的方向和模具的冲压方向不一致，要实现自动卸料难度很大而且也增加了模具的复杂程度。考虑到凸、凹模的加工问题，为了使模具的各个零件加工方便简单，这里把凸、凹模设计成分开的形式，然后再组装成凸模和凹模。卸料形式为手动卸料。?第三套模具结构比较复杂，因为提手部分要实现180度的弯曲同时还附带着一连串的其它弯曲，模具复杂，运动也要分步完成，考虑到了运动的先后问题。 关键词：不规则孔；强度校核；弯曲；凸凹模。????????????????????? ??Abstract?The shield for full text craft analysis that cover is certain to design with molding tool the concrete argument in proceeding design. Get across arts and crafts analyse? confirm need design three set die，leave each other be missing charge hole complex die, bend die and lift bend die.?Analyze according to the craft with make sure, the advanced line in the first molding tool falls to anticipate to hurtle the bore, designing to fall to anticipate to hurtle the compound molding tool in bore humorously. From manufacture accessory drawing come out need dash out hole figure compare complex, attribute abnormity hole. The product spare parts shape size is bigger, so design of is a big, the convex mold comes out with the molding tool that convex and cave mold shape is all more complicated. Reply alveolus? of model carry through intension.?The second work preface demand of the work piece bent is a 3/4 circle? a shape, different from the general work piece has a lot of place, like this the design for molding tool brought the certain hard nut to crack. Think over get rid of feed of aspect and die of pressing aspect do not consistent, come true automatism get rid of feed very difficulty also add? the die complex degree .In consideration of the convex and cave mold processes the problem, is simple for the sake of the each spare parts that make the molding tool process the convenience, assembles here the convex and cave mold design disc