Firstly, the paper is had analyzed the present situation and tendency of the ramming mold industry development through the data. The outline has been brief made about the cold stamping technology classification, the characteristic as well as the development direction; Explained with emphasis curving craft, the drawing craft in the compound mold, and the explanation has been carried on to its principle of work; Simultaneously this paper introduced in detail the ramming mold design process and the principle of work, the analysis based the ramming distortion process and the quality influence factor foundation in the pressing part, the introduction is made for the related matters concerned formulation of the ramming craft plan and design of the ramming mold. Finally the AutoCAD software is used to draw up a serie of the mold setting drawing and the parts drawing.
Keywords : Compound die; Shape forming; Claw-beding; Die design
目 录
中文摘要……i
英文摘要……ii
目录…iii
第一章 绪 论…1
1.1 课题背景1
1.2 我国冲压模具的发展…2
1.2.1 工业之母——模具 …2
1.2.2 我国模具业与国外的差距…3
1.2.3 我国冲压模具的发展趋势…4
1.3 冲压工艺概述…4
1.3.1 冲压工艺的技术……4
1.3.2 冲压工艺的前景……5
1.3.3 冲压工艺的分类……5
1.3.4 成形工艺的技术分析5
1.4 论文的主要内容6
第二章 弯曲工艺7
2.1 引 言…7
2.2 弯曲变形分析…7
2.2.1 弯曲变形过程7
2.2.2 弯曲变形的特点……7
2.2.3 弯曲变形时的应力、应变状态分析9
2.3 弯曲质量分析…10
2.3.1 弯曲裂纹与最小相对弯曲半径……10
2.3.2 弯曲回弹……13
2.4 弯曲偏移16
2.5 弯曲模工作部分尺寸计算……16
2.5.1 弯曲时凸模与凹模之间的间隙 ……16
2.5.2 弯曲时凸模与凹模的宽度尺寸 ……17
2.6 本章小结……19
第三章 拉深工艺……20
3.1 引言…20
3.2 拉深的概述…20
3.3 圆筒形件的拉深变形21
3.3.1 圆筒形件的拉深 …21
3.3.2 拉深过程中坯料内的应力与应变 22
3.3.3 起皱与拉裂 24
3.4 球形制件的拉深……24
3.5 本章小结……25
第四章 冲压件工艺分析及冲压工艺方案的确定…26
4.1 引言…26
4.2 成形工艺的技术分析26
4.3 冲压件工艺分析……26
4.4 各种模具结构介绍…27
4.4.1 单工序模具结构特点27
4.4.2 复合模具结构特点…28
4.4.3 连续(级进)模具结构特点…28
4.5 确定冲压工艺方案…28
4.6 本章小结……29
第五章 模具设计……30
5.1 引言…30
5.2 弯曲计算……30
5.2.1 回弹角……30
5.2.2 弯曲时凸模与凹模之间的间隙……30
5.2.3 弯曲时凸模与凹模的宽度尺寸……30
5.2.4 弯曲时模具圆角半径与凹模深度…30
5.3 压力机选择…31
5.3.1 自由弯曲力…31
5.3.2 校正弯曲力计算……31
5.3.3 弯曲时压力机的压力确定…32
5.4 冲压工艺流程32
5.5 本章小结……33
第六章 总结…34
参考文献…35
致谢36
