反光镜拉深成形有限元分析与工艺分析
本课题选取了汽车前照灯矩形抛物面反光镜的拉深成形作为研究对象，首先对非轴对称件的冲压拉深成形机理进行研究，然后建立反光镜有限元模型，接着对矩形抛物面形件冲压成形进行有限元仿真分析，最后通过对不同模具参数、拉延筋参数、压边力、凸模速度等进行试验寻找合适的参数组合，探讨复杂形件冲压成形中工艺设计的方法，并借助于正交试验最终找到合适的参数组合。8298
关键词：矩形抛物面 有限元仿真分析 参数组合 正交试验
毕业设计说明书（论文）外文摘要
Title Finite Element Analysis and Process Analysis of Deep Drawing of Reflectors
Abstract
Deep drawing is one of the most important operations in sheet metal forming. There are numerous factors affecting the drawing process and preventing to reach the desired drawing height. A car headlamp reflector with rectangular-parabolic surface is chosen as the research object of deep drawing.
Firstly, the mechanism of deep drawing of the non-axisymmetric parts is studied. Then, finite element model of the reflector is established. Moreover, the finite element analysis simulation of parts are conducted, whose shapes are rectangular parabolic. Finally, tests are conducted to find the suitable combination of parameters, Which include parameters of dies, parameters of draw-beads, the blank holder force and the velocity of the punch. Methods of designing the stamping process of complex shapes parts are explored. The available combination of parameters is found by orthogonal tests.
Key words: Rectangular-parabolic surface; Finite element analysis simulation; Combination of parameters; Orthogonal test
目 次
1绪论 1
1.1本课题的研究背景 1
1.2国内外研究现状 1
1.3本文的主要内容和组织结构 4
2.矩形抛物面的拉深成形的理论分析 6
2.1矩形抛物面的特点 6
2.2影响拉深成形的主要因素 7
2.3拉深成形失效主要形式 9
2.4 缺陷的解决措施 10
2.5本章小结 11
3 矩形抛物面有限元建模方法 12
3.1 有限元模拟板料拉深过程 12
3.2 坯料尺寸计算与形状设计 14
3.3 模具三文设计 16
3.4拉深成形有限元模拟 16
3.5 后处理评价 18
3.6 本章小结 22
4矩形抛物面拉深成形单因素仿真分析 23
4.1 仿真试验的总体设计 23
4.2板厚影响的仿真与分析 24
4.3压边力影响的仿真与分析 27
4.4长宽比影响的仿真与分析 30
4.5 凹凸模圆角影响的仿真与分析 32
4.6 直壁转角半径影响的仿真与分析 35
4.7拉延筋影响的仿真与分析 37
4.8本章小结 42
5 拉深成形的多因素正交优化 43
5.1 正交优化试验安排及结果 43
5.2 正交优化试验结果分析 44
5.3 正交优化分析结果验证 49
结论 51
致谢 52
参考文献 53
1绪论