汽车覆盖件汽车大地板左右外侧梁冲压模具毕业设计拉延模具设计说明书xxxxx大学毕业设计（论文）说明书课题名称：基于汽车覆盖件的冲压模设计汽车大地板左右梁拉延模具设计学院：xxxxxxx学院专业：xxxxxxxxxxxxXXXX班级：xxxxxxxxxxx学号：xxxxxxxxxxxx姓名：xxxxxxxxxx指导教师：xxxxxxxxxx201x年x月x日目录1.绪论............................................................................................................................................................11.1课题特点及其研究意义..................................................................................................................11.2选题背景..........................................................................................................................................31.2.1汽车覆盖件模具成型技术取得的进展和研究成果............................................................31.2.2我国汽车覆盖件模具现状...................................................................................................41.2.3现阶段我国模具产业的计划和任务...................................................................................51.2.4我国汽车覆盖件模具的未来与发展方向............................................................................62.大地板左右梁的工艺性分析及冲压工艺方案的确定.............................................................................92.1冲压件的特点..................................................................................................................................92.2工艺性............................................................................................................................................102.3工艺补充........................................................................................................................................102.4方案的提出....................................................................................................................................112.5对工艺方案的分析和最终确定....................................................................................................113.拉延方向的确定和毛坯尺寸的计算......................................................................................................123.1冲压方向的确定............................................................................................................................123.2毛坯尺寸的确定............................................................................................................................123.3模具压力中心的确定....................................................................................................................133.4冲压设备的选用............................................................................................................................133.4.1拉延力的计算.....................................................................................................................133.4.2压边力的计算.....................................................................................................................143.4.3压力机的选择.....................................................................................................................144.拉延模结构设计......................................................................................................................................164.1凸模的结...
