文档介绍：羈肇莁冲压模具设计膀说明书荿蒅蒄膀蒆芇膃芀羇设计者:刘晨宇蚄学号:2009301245羁莀指导教师:蒋建军康永刚莇莆班级:05010903班羄时间:························································:································································································································································································································································································································:··························:·······························(落料凸模、拉深凹模、冲孔凹模)···:·······························、下模板····························································································································································,外形简单,要求按IT8级精度制造,为有孔无凸缘圆筒形件。腿参考图1-1所示零件为无凸缘圆筒形件莇螇蒂艿螈芅膁莈腿羇芄图1-1有孔无凸缘圆筒工件莈莆要求内形尺寸,料厚t=1mm,没有厚度不变的要求;零件的形状简单、对称,底部圆角半径r=>t,参考表1-1知,满足拉深工艺对形状和圆角半径的要求。蒅肃表1-1拉伸件的圆角半径蒈螇螂膈薅(2)要求按IT8级精度制造,采用普通的冲裁加工工艺修边便能满足要求。袅(3)筒件拉深深度H(含修边余量)不宜大于2d(d为筒体直径),当一次可拉成时,其高度H最好为:羂H≤(~)d蕿本套筒修边余量由参考文献1,表7-,H=5+1=6mm<2d=,故拉深高度不大,工艺性良好。芆(4)零件采用的LY12M,硬铝的拉深性能较好,其冲压和拉深性能良好。:羂复合冲压模是在压力机滑块一次行程中、在模具同一工位同时完成冲孔、拉深和落料。罿倒装复合模的凸凹模型孔内积存冲孔废料,对孔壁形成较大的张力。因此倒装复合模最小壁厚b值不能太小,其值与板厚t有关。螄顺装复合模的凸凹模型孔内不积存冲孔废料,每次冲孔废料均由打料装置逆冲入方向打出。因此顺装复合模的凸凹模壁厚允许比倒装复合模的小些。莂由工件图看,该工件需要先落料,然后拉深、之后再在底部冲一个圆孔。为提高生产率可以采用落料、拉深、冲孔复合模结构来完成加工。,先应计算拉深次数及有关工序尺寸。板料厚度t=1mm。,先把零件分割成简单的几何形状,然后分别计算各个形状的面积最后把形状的面积相加,就得到制件的总面积,再利用圆的面积公式反推直径,即得到毛坯尺寸。羄膄芁袈蚆羃莁图1-,必须知道工件能否能一次拉出,还是需要几道工序才能拉成。正确解决这个问题直接关系到拉深工作的经济性的拉深件的质量,拉深次数决定于每次拉深时允许的极限变形程度。圆筒件的拉深变形程度一般用拉深系数表示和衡量。蒆拉深系数m是指拉深前后拉深件筒部直径(或半成品筒部直径)与拉深前坯料(或半成品)直径的比值。部分