华南理工大学学报(自然科学版) ›› 2016, Vol. 44 ›› Issue (2): 53-59.doi: 10.3969/j.issn.1000-565X.2016.02.009

• 机械工程 • 上一篇    下一篇

基于约束投影的多工序板料成形自动定位

陈江 陈文亮 鲍益东   

  1. 南京航空航天大学 机电学院,江苏 南京 210016
  • 收稿日期:2015-07-02 修回日期:2015-10-20 出版日期:2016-02-25 发布日期:2016-01-04
  • 通信作者: 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
  • 作者简介: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
  • 基金资助:
    国家自然科学基金资助项目( 51105200)

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)

摘要: 提出了一种嵌入于多任务提交管理工具框架中的基于网格投影约束的快速自动定位方法. 在当前工序提交求解器计算之前,利用前一工序生成的真实成形结果替代初始板料,调整当前工序中工具与板料之间的位置关系,从而使工具获得理想的初始定位. 与其他多工序数值成形模拟过程所用的定位方法相比,该方法计算时间短,稳定性好,且不影响计算结果的精度,并能有效地解决在数值模拟过程中碰到的带有垂直壁的工具引起的定位问题. 通过某汽车侧围的多工序成形数值模拟,验证了文中方法的可行性.

关键词: 多工序板料成形, 仿真, 自动定位, 约束投影

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