基于汽车梁类件的回弹计算及补偿系统  

Springback Calculation and Compensation System Based on Rail Member Panel

作　　者：聂昕[1] 成艾国[1] 申丹凤 钟志华[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 [2]上海宏旭模具工业有限公司,上海201611

出　　处：《机械工程学报》2009年第7期194-198,203,共6页Journal of Mechanical Engineering

基　　金：国家高技术研究发展计划(863计划;007AA042006);国家重点基础研究发展计划(973计划;2004CB719402);"十一五"国家科技支撑计划(2006BAF02A02)资助项目

摘　　要：板件回弹问题一直是学术界和工程界研究的热点,特别是在车身广泛应用高强度钢板之后回弹问题更加明显。针对汽车梁类件的造型特点,建立基于梁类件的回弹计算、回弹补偿及工艺型面修改的整套分析系统。在此系统中,先利用二维截面法和有限元软件来计算零件各断面的回弹量,保证其回弹计算的精确性。再通过节点偏置算法来补偿各断面节点的回弹量,得到各断面回弹前和补偿后的节点信息。最后按照各个断面回弹前和补偿后的节点的一一对应关系,以原始型面为基础,运用型面整体变形(Shape global deformation,SGD)算法来对零件的工艺型面进行补偿修改。能够保证变形前后的型面整体拓扑关系的一致性,极大地保证曲面的质量和光顺程度,以便得到更为精确的回弹补偿型面。实践证明,该系统能够很大程度节省处理回弹问题的时间和精力,并且在补偿型面的修改精度上有较大的提高,回弹补偿更加准确。Springback problem is always a hotspot in automotive industry and academia, especially when the application of high strength steel in automotive panel is more and more popular. Based on the modeling characteristics of rail panel, a complete system able to calculate and compensate springback and modify the profile is presented. The system includes three main aspects. Firstly, springback of sections can be calculated by 2D section method and finite element method （FEM） codes and the accurate springback results can be obtained in the system. Secondly, the section nodes can be compensated by node-offset algorithm and the nodes information of each section before springback and after compensation can be obtained. And thirdly, according to the matching relationship of the section nodes before springback and after compensation, the compensated profile can be obtained by shape global deformation （SGD） algorithm based on the original profile in this system. This method can ensure the topology consistency of surface before and after modifications and the quality and smoothness of compensated curved surface. The practice proves that this system can save time and cost to a great extent in dealing with springback of rail panel and also a great improvement in surface-smoothness and more accurate compensation can be achieved.

关 键 词：梁类件 回弹计算及补偿系统 二维截面法 节点偏置算法 型面整体变形算法 

分 类 号：TG156[金属学及工艺—热处理]