机械5

风罩成形工艺及模具设计 摘要：冷冲压加工在我国已有很长的历史，封建社会时期我国劳动人民纯手工打造金、银和铜饰品，制作各种日用品，就已显示出精巧的工艺技术，但那时人们劳动强度大，制作时间长，不宜生产大量的生活用品供生活所需，随着现今科技的进步，工业发展，模具在工业生产中引起了人们的重视。冲压模具生产产品效率高，能保证工件的精度，实现了自动化，适合大批量生产。未来模具将向全面推广CAD/CAE/CAM,模具优质材料及表面处理技术，特种加工，模具扫描及数字化系统，模具研磨抛光将自动化、智能化，模具自动加工系统方向发展。 本设计是对风罩的落料、冲孔、切边的设计，完成的内容为：对模具在工业生产中的作用，模具发展历史与现状，未来模具的发展前景做了概述。进行零件的形状、尺寸、精度工艺分析，确定合理的工艺方案，确定工序数目。确定拉深凸、凹模间隙，计算落料、冲孔的凸、凹模刃口尺寸。确定凸、凹模结构，并绘制零件图，设计定位零件，压料、卸料、出件零部件，设计固定零件，选择模架标注紧固件，最后绘制模具非标准零件图。 本设计运用模具使钢料产生塑性变形，获得最终需要的零件，这是一种少切削、无切削、多工序重合的生产方法，并且生产零件，提高了生产效率，对相似工件的大批量生产具有参考的作用。 关键词：风罩;落料;冲孔;切边;复合膜 Thewi
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ne. 目录 第一章绪论1 1.1模具的发展历史与现状1 1.2冲压模具的发展趋势1 1.2.1模具自动加工系统的发展2 1.2.2优质材料及先进表面处理技术2 1.2.3特种加工技术的发展2 1.2.4全面推广CAD/CAM/CAE技术2 1.2.5模具扫描及数字化系统2 1.3本研究的内容3 第二章风罩冲压工艺的分析4 2.1零件的工艺性分析4 2.1.1工件的设计要求4 2.1.2零件工艺性分析4 2.1.3冲压工艺方案的确定5 2.2冲裁过程中的相关计算问题5 2.2.1冲裁力的计算5 2.2.2工作零件刃口尺寸计算5 2.2.3冲裁刃口尺寸计算原则6 2..2.4冲裁凸凹模刃口尺寸计算6 2.2.5冲孔力8 2.2.6推件力...................................................................................................8 2.2.7顶件力...................................................................................................9 第三章模具的结构设计10 3.1冲压设备类型的选择10 3.1.1冲压设备规格的确定10 3.2凸凹模固定板11 3.3导柱导套13 3.4垫板13 3.5紧固件连接件14 3.6模柄和模架的选择14 3.7其它零件.......................................................................................................15 3.8模具总体结构的设计16 第四章模具零件的加工工艺....................................................................................19 设计总结21 参考文献22 致谢23