• CN:11-2187/TH
  • ISSN:0577-6686

›› 2007, Vol. 43 ›› Issue (12): 88-92.

• 论文 • 上一篇    下一篇

板料成形仿真中冲模速度的确定方法

胡玉梅;张健;邓兆祥;王勇   

  1. 重庆大学机械传动国家重点实验室;重庆大学研究生创新基地
  • 发布日期:2007-12-15

DEFINITION METHOD ON PUNCH VELOCITY IN FORMING SIMULATION OF SHEET METAL

HU Yumei; ZHANG Jian;DENG Zhaoxiang; WANG Yong   

  1. State Key Laboratory of Mechanical Transmission, Chongqing University Inno-Base for Granduates, Chongqing University
  • Published:2007-12-15

摘要: 从板料变形和能量角度研究汽车薄壳类板料深冲压成形的计算机仿真情况,以及冲模速度对计算时间、板料变形的影响,提出以板料动能占总能量的比值及板料减薄率的变化量为参考确定冲模速度的方法,这种确定方法可避免由惯性效应引起的网格畸变,同时还能极大地缩短汽车薄壳类板料深冲压成形仿真计算时间。对于宝钢ST16材料的深冲压成形仿真,在确保板料动能占总能量的比值小于19%,板料减薄率的变化量的相对误差小于3%时,尽可能提高冲模速度会极大地缩短仿真时间,同时可获得满足工程精度要求的仿真结果。将冲模速度的确定方法应用到某新车型油箱的深冲压成形仿真中,取得了良好的效果。

关键词: 板料成形, 冲模速度, 能量, 显式算法

Abstract: The influences of punch velocity to simulation time and results in automobile sheet metal forming simulation are studied at the view of sheet deforming and energy, a method is put forward to define the punch’s velocity basing on the ratio of kinetic energy versus total energy and the change of sheet deforming ratio. The definition method on punch velocity in forming simulation of the sheet metal can avoid grid aberration caused with inertia effects and reduce simulation time efficiently in computer simulation. As to Bao Gang ST16 material, if the ratio of kinetic energy versus total energy is ensured within less than 19%, and the change of sheet deforming ratio less than 3%, the punch velocity is elevated as high as possible, the simulation time will be efficiently shortened, and the simulation result will also satisfy engineering demands. The definition method on punch velocity in forming simulation of the sheet metal is applied to an oil-tank forming simulation and makes a good effect.

Key words: Energy, Explicit calculation, Punch velocity, Sheet forming

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