中国机械工程 ›› 2010, Vol. 21 ›› Issue (21): 2624-2627.

• 材料工程 • 上一篇    下一篇

等效拉深筋精细数值化模型与起皱模拟应用

张华
  

  1. 福建信息职业技术学院,褔州,350003
  • 出版日期:2010-11-10 发布日期:2010-11-12
  • 基金资助:
    国家科技重大专项(2009ZX04013-031);福建省科技计划资助重点项目(2009H0010) 
    National Science and Technology Major Project ( No. 2009ZX04013-031);
    Key Program of Fujian Provincial Science and Technology ( No. 2009H0010)

A Detailed Numerical Drawbead Model and Its Applications to Wrinkle Simulation

Zhang Hua
  

  1. Fujian Polytechnic of Information Technology,Fuzhou,350003
  • Online:2010-11-10 Published:2010-11-12
  • Supported by:
     
    National Science and Technology Major Project ( No. 2009ZX04013-031);
    Key Program of Fujian Provincial Science and Technology ( No. 2009H0010)

摘要:

提出一种等效拉深筋精细数值化模型。根据拉深筋与弹簧的作用效果相似的特点,在板料冲压成形动力显式算法中采用弹簧单元处理等效拉深筋模型,实时、同步地反映等效拉深筋模型的被动作用效果,能更准确地模拟冲压成形过程中板料的流动规律。实际汽车覆盖件实验结果表明,等效拉深筋精细数值化模型能够准确模拟拉延成形过程中局部起皱的产生、发展和最终起皱的形貌。

关键词:

Abstract:

A numerical drawbead model developed in sheet metal forming simulation was introduced. According to the similar effect between an equivalent drawbead model and a spring, a spring element was adopted to treat the drawbead process in the incremental dynamic explicit method. The treatment can consider the drawbead passive effect in real-time and synchronously to reflect the sheet metal flow law. The results of practical automobile panel show that the numerical drawbead model can simulate the development of local wrinkling in deep drawing with higher precision.

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