A Case Study of Drawbead Design of a Deep Drawn Rectangular Part Using FEM
The deep drawing manufacturing process of sheet metal parts with complex shape has increased recently in applications such as in the automotive industry and the household appliances. The trial and error methods commonly used in defining the process parameters, cause high costs and large development times. The computer assisted analysis and simulations are being used more frequently to reduce the cost and development time of a product. The process parameters can be modified and evaluated using these computer simulations before the production is carried out. Therefore the defects of a part can be identified and eliminated, if possible, without the need of the traditional trial and error methods. This paper presents a case study of an industrial component that presented defects (wrinkles at the corners) in its deep drawing process. To eliminate these defects a drawbead was proposed and its optimal location was established using an optimization procedure based on finite element method (FEM). The FEM simulations were validated by measuring the thickness of the fabricated part. To evaluate the elimination of the wrinkle, the thickness of the sheet metal at the critical area was measured in the FEM simulation and compared with the thickness profile before and after the addition of the drawbeads. The results have shown that the design strategy based on FEM can be effectively used as a design tool to eliminate part defects in rectangular deep drawing process.
From：ASME 2009 International Mechanical Engineering Congress and Exposition37166
Volume 4: Design and Manufacturing
Lake Buena Vista, Florida, USA, November 13–19, 2009
一个利用有限元法绘制矩形拉深件的案例
在板料冲压拉深制造过程中，复杂形状的拉深件最近时常被运用于，诸如汽车工业和家用电器中。试验和常用参数定义过程中的错误，往往会导致高成本和长时间的程序调试时间。频繁地利用计算机的辅助分析和仿真系统，可以减少产品的成本以及开发时间。在产品生产之前，利用计算机的模拟仿真，可以对工艺参数进行修改与评估。因此，如果可能的话，不需要通过传统的试验方法，就能识别并消除部分产品缺陷。此文介绍了一个关于工业组件在拉深过程中弯角处起皱缺陷的案例研究。为了消除这些缺陷，在运用有限元法的基础上，成形过程及其最佳理想位置的建立得到了优化。通过有限元模拟，能够验证测量预制件的厚度。为了评估消除的起皱现象，金属板料的关键区域由有限元法进行模拟，并与拉深成形过程前后的厚度数据进行比较。结果表明，基于有限元法的设计可以有效地用来作为消除矩形件在拉深过程中缺陷的设计工具。论文网
摘自：2009年美国机械工程师学会国际机械工程大会暨博览会
第4卷：设计与制造
Lake Buena Vista, 美国 佛罗里达, 2009年11月13-19日
会议主办单位: 美国机械工程师学会
ISBN: 978-0-7918-4377-2 | eISBN: 978-0-7918-3863-1
版权 美国机械工程师学会© 2009 有限元法绘制矩形拉深件英文文献和中文翻译:http://www.youerw.com/fanyi/lunwen_35858.html