目录摘要：··································································IAbstract：······························································II1．前言·······························································41.1本课题研究的主要内容及现实意义····························41.2冷冲压加工的特点············································41.3冲压模具行业发展现状及技术趋势····························52.冷冲模的准备工作的分析·········································52.1冷热模具在服役中失效的基本形式···························52.1.1塑性变形··················································72.1.2磨损失效·················································72.1.3疲劳失效·················································72.1.4断裂失效·················································72.2模具失效原因及预防措施····································72.2.1结构设计不合理引起失效···································82.2.2模具材料质量差引起的失效·································82.2.3模具的机加工不0当·········································92.2.4模具热处理工艺不合适·····································103.正装式落料冲孔复合模设计······································103.1工艺分析····················································103.2冲裁工艺方案的确定·········································103.2.1方案种类·················································103.2.2方案的比较···············································113.2.3方案的确定···············································113.3模具结构形式的确定·········································113.4必要的尺寸计算··············································113.4.1毛还的尺寸参数计算·······································123.4.2压力中心计算·············································123.4.3排样设计与计算···········································133.5各部分工艺力计算···········································133.5.1落料力的计算·············································1313.5.2冲孔力·······························...