毕业设计（论文）
题 目＿＿端盖落料拉深冲孔复合模设计
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姓名：赵欣佳 专业：模具设计与制造 班级: 模具1204班
学号： 0102120412 设计题目： 端盖落料拉深冲孔复合膜
工件简图：
名称：端盖 材料：20号钢 数量：大批量生产
要求：工件拉深精度应在IT13级以下，不宜高于IT11级。除中心孔和两中心孔的距离尺寸接近IT11级外，其余尺寸均为自由尺寸且无其他特殊要求。
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摘 要
随着中国工业不断地发展，模具行业也显得越来越重要。本文针对端盖的冲裁工艺性和拉深工艺性，分析比较了成形过程的三种不同冲压工艺（单工序、复合工序和连续工序），确定用一幅复合模完成落料、拉深和冲孔的工序过程。介绍了端盖冷冲压成形过程，经过对端盖的批量生产、零件质量、零件结构以及使用要求的分析、研究，按照不降低使用性能为前提，将其确定为冲压件，用冲压方法完成零件的加工，且简要分析了坯料形状、尺寸，排样、裁板方案，拉深次数，冲压工序性质、数目和顺序的确定。进行了工艺力、压力中心、模具工作部分尺寸及公差的计算，并设计出模具。还具体分析了模具的主要零部件（如凸凹模、卸料装置、拉深凸模、垫板、凸模固定板等）的设计与制造，冲压设备的选用，凸凹模间隙调整和编制一个重要零件的加工工艺过程。列出了模具所需零件的详细清单，并给出了合理的装配图。通过充分利用现代模具制造技术对传统机械零件进行结构改进、优化设计、优化工艺方法能大幅度提高生产效率，这种方法对类似产品具有一定的借鉴作用。
关键词：端盖；模具设计；复合模；拉深冲孔
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主要符号表
目 录
1 分析零件的工艺性 ······························································ 1 2 确定工艺方案 ···································································· 2
2.1 计算毛坯尺寸 ············································································· 2 2.2 确定是否要压边圈 ······································································· 3 2.3 计算拉深次数 ············································································· 3 2.4 确定工艺方案 ············································································· 4
3 主要工艺参数的计算 ··························································· 5
3.1 确定排样、裁板方案 ···································································· 5 3.2 计算工艺力、初选设备 ································································· 6 3.2.1 计算工艺力 ·········································································· 6 （1）落料力 ················································································ 6 （2）冲孔力 ················································································ 7 （3）推件力 ················································································ 7 （4）拉深力 ················································································ 7 （5）压边力 ················································································ 8 3.2.2 拉深功的计算 ······································································· 9 3.2.3 初选压力机 ·········································································· 9 3.2.4 计算压力中心 ····································································· 10 3.2.5 计算凸、凹模刃口尺寸及公差 ·················································· 10
4 模具的结构设计 ································································ 12
4.1 模具结构形式的选择 ·································································· 12 4.1.1 模架的选用 ········································································ 12 4.1.2 模具的闭合高度 ·································································· 13
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主要符号表
4.2 模具工作部分尺寸计算 ······························································· 14 4.2.1 落料凹模 ··········································································· 15 4.2.2 拉深凸模 ··········································································· 16 4.2.3 凸凹模 ·············································································· 17 4.2.4 弹压御料板 ········································································ 18 4.2.5 上垫板 ·············································································· 18 4.2.6 压边圈 ·············································································· 19
5 模具的整体安装 ································································ 20
5.1 模具的总装配 ··········································································· 20 5.2 模具零件 ················································································· 21
6 选定冲压设备 ··································································· 22 7 模具的装配 ······································································ 22
7.1 复合模的装配 ··········································································· 22 7.2 凸、凹模间隙的调整 ·································································· 22
8 重要零件的加工工艺过程编制 ·············································· 23 结论 ··················································································· 26 参考文献 ············································································· 27 致谢 ··················································································· 28 附录 ··················································································· 30 实习报告 ············································································· 37
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