• CN:11-2187/TH
  • ISSN:0577-6686

›› 2001, Vol. 37 ›› Issue (11): 92-95.

• 论文 • 上一篇    下一篇

板条多点成形中曲率分布及回弹控制的研究

李淑慧;林忠钦;李明哲   

  1. 上海交通大学机械工程学院;吉林大学
  • 发布日期:2001-11-15

RESEARCH ON CURVATURE DISTRIBUTION AND RESILIENCE CONTROL DURING MULTI-POINT FORMING PROCESS

Li Shuhui;Lin Zhongqin;Li Mingzhe   

  1. Shanghai Jiaotong University Jilin University of Technology
  • Published:2001-11-15

摘要: 分析了板条在整体模具成形与多点成形过程中的受力状态,指出整体模具成形和多点成形的实质均为多点弯曲成形;通过有限元分析揭示了采用不同成形方式,如:多点模具成形、多点压机成形和整体模具成形时,板条柱面弯曲曲率分布及回弹规律,从而提出了有效抑制回弹及均布曲率的反复多点成形方法;利用有限元法对反复成形抑制回弹的机理进行了分析,考查了反复成形次数对曲率分布及回弹控制的影响。

关键词: 多点成形, 回弹, 曲率, 有限元法

Abstract: The deformation characteristics of the MPF (Multi-point forming) and the stamping processes are analyzed. It is pointed out that both these forming methods belong to the multi-point bending process by nature. The cylindrically bending processes in different manners, such as, multi-point die forming (MPDF), multi-point press forming (MPPF) and die stamping, are simulated by the finite element method. The rule of the curvature uniformity along the strip length and the shaping precision is drawn out. Then the method named multi-point alternating forming (MPAF) that is propitious to the curvature uniformity and the resilience control is presented. The mechanism of the resilience control for the MPAF method is interpreted based on the comparison between the MPDF and MPAF methods, And the effect of the alternating times on the resilience control is also studied.

Key words: Curvature, Finite element method, Multi-point forming, Resilience control

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