摘 要
空调外机顶盖是一种典型的冲压件，它是企业二类外观件，要求它的外表面平滑度要高，成形性要好，无皱折、裂纹等缺陷，而对其内表面的要求较低。
论文根据顶盖的结构和尺寸特点，在进行广泛查阅文献的基础上，借助冲压工艺理论对其进行了工艺性分析及方案比较，确定了它的工艺方案为：落料冲孔→拉深成形→一次翻边拉弯→二次翻边拉弯→三次翻边拉弯→折边。
利用数值模拟软件DYNAFORM，对顶盖拉深成形工艺过程进行了模拟。通过模拟结果的分析，验证了一次拉深成形的工艺方法。论文设计了顶盖落料冲孔复合模具及拉深成形模具；对关键工艺参数及相应工作尺寸进行了计算；完成了顶盖落料冲孔复合模及拉深成形模的模具总装图及关键零件的零件图的绘制。
关键词：空调外机顶盖，冲压成形，拉深成形模拟，模具设计
ABSTRACT
Outdoor-segment of air-conditioner upper-box is a typical stamp. It is the second category of appearance in enterprises, which requests higher smoothness on the outer surface, better forming, no fold, cracks and other defects, while lower on the inner surface of all the factors.
According to Upper-Box’s structure and size characteristics, based on a wide range of literatures, the paper analyzes and compares its forming processes in virtue of stamping technology, and finally establishes its process program: blanking piercing →drawing forming →first flanging →second flanging →three flanging →flapping.
Drawing forming process of the upper-box is simulated by numerical simulation software DYNAFORM. According to the analysis of the simulation results, one drawing forming method could be carried out. The paper designs blanking-piercing compound die and drawing forming die, calculates the key process parameters and corresponding working size, accomplishes assembly drawing of blanking-piercing compound die and drawing forming die, as well as part drawing of key accessories in the die.
Key words：Outdoor-segment of air-conditioner upper-box, stamping forming, drawing forming simulation, die design
目 录 16000字
中文摘要 Ⅰ
ABSTRACT Ⅱ
1绪论 1
1.1 选题背景 1
1.2 选题意义 1
1.3 板料冲压发展现状 2
1.4 板料成形模拟技术发展现状 2
2 顶盖冲压工艺分析 5
2.1 零件分析 5
2.1.1 材料性能分析 5
2.1.2 零件结构分析 6
2.2 确定工艺方案 7
2.2.1 工艺方案比较 7
2.2.2 填写工艺卡 7
2.3 毛坯展开与排样 11
2.3.1 毛坯的展开 11
2.3.2 排样与搭边 12
3 DYNAFORM数值模拟 13
3.1 模拟准备 13
3.2 模拟过程 14
3.2 模拟结果分析 16
4 模具设计与工艺计算 17
4.1 落料冲孔复合工序 17
4.11 工艺计算 17
4.12 压力机的选择 19
4.13 模具零件设计 20
4.14 冲模闭合高度 22
4.15 模具工作原理 23
4.2 拉深成形工序 24
4.21 工艺计算 24
4.22 压力机的选择 26
4.23 模具零件设计 27
4.24 模具闭合高度 29
4.25 模具工作原理 30
5 结论 31
答谢辞 32
参考文献 33
工序(2)模具(22)冲压(3)空调(7)外机(1)顶盖(1)