摘要随着工业技术不断的完善和对冲压件精度要求的提高，板料冲压中对回弹控制的要求不断提高，在双层板料成形中控制回弹更为复杂。

本文主要选取了双层件中最常用的最基本的V形件，探讨压边力、冲压速度、模具开度、圆角半径、板间摩擦系数以及板厚对双层V形件冲压回弹的影响。利用有限元分析软件DYNAFORM，定量分析并总结不同参数对内板和外板成形和回弹的影响。并利用正交试验探讨控制板料成形后回弹的较佳的取值组合，为实际生产提供帮助。60941

毕业论文关键词 双层V形件 冲压 回弹 有限元分析 正交试验

毕业设计说明书（论文）外文摘要

Title  Finite element analysis on the Springback of     Double-deck V-shaped sheet metal                        

Abstract

With the constantly improvement of the industrial technology the stamping precision, the requirement of the sheet metal stamping for the springback control is increasing. It is more complicated to control the springback of  the double-deck sheet metal. In this paper, one of the most commonly used sheet metal,the double-deck V-shaped sheet metal was selected to discuss the impact of different factors on this sheet metal ,such as blank holder force, stamping speed, the thickness of the sheet metal, the mold angle, the radius of fillet, and the frictional coefficient. With the Dynaform,, the quantitative finite element analysis of both the inner sheet and the outer sheet which effected by different parameters was made. To control the springback of the double-deck V-shaped sheet matel and provide help for actual production, Orthogonal test was used to research the better value.

Keywords  springback;double-deck V-shaped sheet metal;analysis; Orthogonal test

目  次

1  绪论 1

1.1 课题选题背景 1

1.2 双层V形件冲压回弹研究的现状 1

1.3 本论文主要构架 2

2 双层V形件冲压回弹理论分析 3

2.1 板料V形弯曲回弹理论模型 3

2.2 板厚及中性层弯曲半径的计算 4

2.3 V形件的回弹计算 5

3  双层V形件冲压建模与仿真步骤 7

3.1双层V形件模具与板料建模 7

3.2双层V形件冲压仿真步骤 9

4  双层V形件冲压回弹仿真及试验分析 12

4.1具体方案设定 12

4.2压边力对双层V形件回弹的影响 13

4.3内外板厚对双层V形件冲压回弹的影响 17

4.4模具开度对双层V形件冲压回弹的影响 22

4.5圆角半径对双层V形件冲压回弹的影响 26

4.6冲压速度对双层V形件冲压回弹的影响 30

4.7摩擦系数对双层V形件冲压回弹的影响 35

4.8本章小结 39

5  双层V形件冲压仿真正交试验及分析 40

5.1 确定正交试验的因素个数