有限元逆正向法优化汽车覆盖件成形毛坯  

Blank Optimization for Automobile Panel Based on Inverse and Forward Finite Element methods

作　　者：严冰剑 李永华[1] 

机构地区：[1]沈阳理工大学材料科学与工程学院,沈阳110159

出　　处：《沈阳理工大学学报》2016年第2期96-99,110,共5页Journal of Shenyang Ligong University

摘　　要：具有合理的形状和尺寸的毛坯能改善覆盖件的冲压成形性能,提高材料的利用率。为克服逆向模拟得到的毛坯精度不足和形状误差问题,采用逆、正模拟结合的毛坯形状优化技术,即反向模拟预测其初始坯料形状,然后利用正向模拟进行毛坯修正,最终获得优化的毛坯形状和尺寸。以左、右后轮罩为例,在相同的成形工艺条件下,应用有限元软件Autoform模拟。结果表明,优化后零件的成形质量明显提高,并节约了材料,同时也表明该技术可用于大型覆盖件毛坯优化。Optimal blank with reasonable shape and dimension is necessary for improvement of the stamping formability of automobile panel and utilization of blank material. In order to resolve the problems of poor precision and shape deviation of the blank obtained by inverse finite element method, the inverse finite element method combined with forward finite element method was applied to optimize the blank shape of automobile panel. Firstly, the inverse finite element simulation was applied to predict its initial blank shape. Secondly, the blank was modified by the forward simulation. Lastly, the optimal shape and dimension of the blank could be obtained. The automobile wheelhouse-RR-R/L was chosen as the example to simulate in the same process condition with the software of Autoform. The results showed that the forming quality of the part was obviously improved with saving materials.This method could be applied to the blank optimization of the large-scale cover panel.

关 键 词：车覆盖件 逆向法 正向法 毛坯优化 

分 类 号：TG386.32[金属学及工艺—金属压力加工]