机械5

壳体的冲孔切边工艺与模具设计 摘要 模具设计与制造是整个模具行业中最关键的部分,也是占用模具开发周期最长的部分。因此,缩短模具设计与制造周期对于提高模具的开发和设计有着极为重要的现实意义。 本课题为壳体的冲孔切边复合模设计，结合其模具设计特有工艺性，进行了工艺性分析，并分析了成形过程的三种不同的冲压工艺方案，从理论探讨及实验上提出了最佳工艺方案。介绍了模具设计要点、结构分析、工作原理；并对模具的各部分主要尺寸进行理论运算，以确定各冲模的尺寸；对冲裁模从设计到零部件的加工工艺以及装配工艺等进行了详细阐述，简要分析了模具关键零部件的设计及加工工艺。实践证明，模具结构能很好地满足零件的精度要求，不仅模具结构左右对称，并且受力均匀。 通过对壳体的冲孔切边模具设计，巩固和深化了所学知识，取得了比较满意的效果，达到了预期的设计意图。 关键字：冲孔，切边，复合模，刃口 SHEET FORMING TECHNOLOGY AND DIE DESIGN OF CHAIN LINK ABSTRACT Mould desig
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ng edge 目录 摘要1 ABSTRACT 2 1绪论5 1.1冷冲压模具在工业生产中的地位5 1.2冷冲压模具的分类5 1.2.1按冲压工艺进行分类5 1.2.2按工序组合程度进行分类5 1.2.3按上下模的导向方式分类6 1.2.4按导料或定位形式分类6 1.2.5按使用模具材料分类6 1.2.6按生产适应性分类6 1.3链节模具设计7 1.3.1链节模具设计的设计思路7 1.3.2链节模具设计预进度7 2制件工艺性分析及工艺计算8 2.1制件工艺分析8 2.1.1冲压件的工艺分析9 2.1.2冲压工艺方案的确定9 2.2典型零件的工艺计算9 2.2.1凸、凹模刃口尺寸的计算9 2.2.2冲裁力的计算10 2.2.3压力中心的确定12 2.2.4初选压力机12 2.2.5卸料橡胶的设计13 2.3模具总体设计14 2.4模具主要零部件的结构设计14 2.4.1工作零部件的结构设计14 2.4.2卸料装置的设计与标准化18 2.4.3模架及其它零部件的设计19 3模具结构设计21 4模具总装22 4.1模具总装图22 4.2模具工作原理22 4.3模具的装配23 4.3.1凸凹模预配23 4.3.2凸模装配23 4.3.3装配下模23 4.3.4装配上模23 4.3.5模具装配特点23 4.3.6装配技术要求24 4.3.7装配的工艺要点24 5设计小结27 致谢29 参考文献30