覆盖件成形缺陷的数值仿真实例分析  

Case Analysis of Numerical Simulation for Automobile Panel Forming Defects

作　　者：项辉宇[1] 冷崇杰[1] 张媛[1] 程建璞[1] 

机构地区：[1]北京工商大学机械自动化学院,北京100037

出　　处：《计算机仿真》2009年第12期226-229,共4页Computer Simulation

基　　金：北京市自然科学基金项目(3083018);北京市教委科技发展计划面上项目(KM200610011009);北京市属市管高校中青年骨干教师计划;北京市优秀人才培养资助项目(20061D0500300138)

摘　　要：为研究汽车大型覆盖件成形规律,并分析其缺陷成因,介绍了板料成形动态显式有限元数值仿真技术的应用现状、基本理论及应用步骤。通过实例研究了采用有限元数值仿真技术进行覆盖件成形缺陷成因仿真分析的途径。仿真结果表明,采用数值仿真可以分析覆盖件变形规律,了解冲压过程中应力、应变分布及方向,成形极限图分布及缺陷情况,进而改进模具结构和冲压工艺,消除成形缺陷、提高产品质量。数值仿真技术是解决大型汽车覆盖件成形缺陷问题的有效工具。To study the forming characteristics and the causation of forming defects of automobile panel parts, the present application situation, the fundamental theory and method of numerical simulation using dynamic explicit algorithm for sheet metal forming process are analyzed. Based on a practical case study, an approach to perform Auto - panel forming defects analysis by means of numerical simulation method is introduced. The result shows that the forming characteristic parameter, such as stress, strain distribution and orientation during the stamping process can be obtained, the forming limit diagram and the potential forming defects can be analyzed with simulation method. These results are important for providing further measures to improve mould structure and stamping process, and thus solving forming defects and enhancing product quality. Numerical simulation is an effective way for solving the problem of large shape automobile panel stamping defects.

关 键 词：数值仿真 有限元方法 板料成形 汽车覆盖件 

分 类 号：TG306[金属学及工艺—金属压力加工]