Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (2): 53-59.doi: 10.3969/j.issn.1000-565X.2016.02.009

• Mechanical Engineering • Previous Articles     Next Articles

Automatic Positioning of Multi-Stage Sheet Forming Based on Constrained Projection

CHEN Jiang CHEN Wen-liang BAO Yi-dong   

  1. College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China
  • Received:2015-07-02 Revised:2015-10-20 Online:2016-02-25 Published:2016-01-04
  • Contact: 陈文亮(1966-) ，男，教授，博士生导师，主要从事CAD/CAM/CAE 研究． E-mail:cwlme@nuaa.edu.cn
  • About author:陈江(1980-) ，男，博士生，主要从事板料成形CAE 技术研究． E-mail:chenjiang@eta．com．cn
  • Supported by:
    Supported by National Natural Science Foundation of China( 51105200)

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Abstract: Proposed in this paper is a fast automatic positioning method based on the constrained projection of meshes,which is embedded in the framework of multi-job submitting system.In order to get a more accurate initial position between the sheet and the tool,the real forming result of the previous stage is utilized to replace the initial sheet to adjust the tool position before the current stage is submitted to the solver.As compared with some other positioning methods for multi-stage simulation,the proposed method is of low time cost,good stability and high positioning accuracy,and it effectively solves the positioning problem caused by the vertical wall of tools.Simulated results of the multi-stage forming process of an automobile body demonstrate that the proposed method is feasible.

Key words: multi-stage sheet forming, simulation, automatic positioning, constrained projection