机械5

U形件方盒形端盖的拉深冲压工艺模具设计【拉深和切边复合模】 摘要：本设计课题介绍了盒形盖体拉伸挤切复合模的结构设计及工作过程。针对零件挤切后口部呈尖锐刃口状现象，改进了模具结构，消除部分加工缺陷，分体现了冲压工艺先进性和高效性,有一定的设计意义。通过对工艺零件的工艺分析及模具结构设计,巩固所学的知识、熟悉有关资料,树立正确的设计思路,加强了对模具的整体认识,提高自己的实际模具设计工作能力。 本计运用了冲压成形模具设计的基本知识，首先对整个零件的了解分析工艺参数,冲压工艺性能,然后确定冲压模的结构形式，工零部件的设计与计算，拉深和切边在一个工序上完成，本副模具优点结构简单紧凑，易于加工维修，缺点取件可能不太方便。 关键词：工艺分析；拉深成型；切边；模具结构；盒形壳体拉伸 Cover Te
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ng; Die structure; 目录 第1章绪论………………………………………………………….….………..1 1.1国内模具的现状和发展趋势…………………………………….….………..1 1.1.1国内模具的现状……………………………………………….....……..1 1.1.2国内模具的发展趋势……………………………….…………....…….. 2 1.2国外模具的现状和发展趋势........……………………….……………….…3 1.3端盖拉深模具设计与制造方面........……………….……….………………3 1.3.1端盖拉深模具设计的设计思路……………………………….........…. 4 1.3.2低方形件拉深模具设计的进度…………………………………..….…5 第2章端盖拉深冲压件的工艺分析…………………….………………………6 2.1引言…………………………………….………………………………....……..6 2.2拉深件工艺分析........……………………….…………………...…..….…….6 第3章确定工艺方案……………………..….……………………….…...........8 第4章主要工艺参数的计算……………………..….………….………………9 4.1拉深毛坯尺寸计算………………………………………………...…...……...9 4.2确定拉深次数……………………………………………………....……..…10 4.3确定是否用压边圈及类型……………………………………….....…….…10 4.4排样方式的确定…………………………………………………..………...11 第5章冲裁压力、压力中心计算及压力机的选用….…………..…………..12 5.1切边冲裁力的计算……………………………….….……………...………...12 5.1.1切边力的计算…………………………………………………...…....12 5.2拉深力的计算........…………………………………………...…...……........12 5.3卸料力的计算……………….………………………………...………...........13 5.4压料力的计算.……………….………………….…………......…………...13 5.5拉深功的计算……………….……………………………...……………....13 5.6拉深功率的计算……………………………….………………...…………...14 5.7压力的选用…………….………………………………...…………..…..…14 第6章模具的结构设计……………………………………………….....…...…16 6.1模具工作部分的工艺计算………………………………….………...…....16 6.1.1拉深部分的计算…………………………………………………..….....16 6.1.2挤切部分的计算…………………………………………………..........17 6.1.3压料橡胶的设计与计算……………………………………….....…..…18 6.1.4弹簧的选用………………………………………………………....……..19 6.1.5选用模架、确定闭合高度及总体尺寸…………………………......…19 6.2模具零件的结构设计........………………...………….......………..........20 6.2.1拉深凸模…………………………………………………………...........20 6.2.2拉深凹模…………………………………………………………...........21 6.2.3推件块…………………………………………………………...…….…21 6.2.4压边圈…………………………………………………………...………..22 6.2.5导柱、导套…………………………………………………………........23 6.2.6其他零件………………………………………………….....…….…...23 6.3模具总装图……………….………………………………...…...……….…24 第7章结束语……………………………….……………..……………….......26 致谢……………………………….…………………..………………...……........27 参考文献………………………….………………..……..……………….……....28