多弯角零件冲压回弹控制方法的研究  

Study on stamping springback controlling of parts with multi-fillet

作　　者：谢晖[1] 唐长民 程威[1] 张文彦 王东福 XIE Hui;TANG Chang-min;CHENG Wei;ZHANG Wen-yan;WANG Dong-fu(Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;Shanghai Tractor ＆ Internal Combustion Engine Co. , Ltd. , Shanghai 200433, China)

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,湖南长沙410082 [2]上海拖拉机内燃机有限公司,上海200433

出　　处：《塑性工程学报》2018年第1期22-27,共6页Journal of Plasticity Engineering

基　　金：湖南省战略性新兴产业科技攻关类项目(2016GK4008);国家科技支撑计划项目(2015BAF32B03、2015BAF01B01)

摘　　要：针对多弯角类零件回弹大、影响因素多等特点,提出一种综合考虑零件结构和工艺参数的控制多弯角零件回弹的方法。理论分析了回弹的原因,根据多弯角零件的特点,选出零件加强筋数目、压边力、圆角半径、型面夹角以及拉延筋系数5个主要因子,通过Box-Behnken设计试验对各回弹影响因子的作用进行探究。根据AutoForm软件仿真计算获得的样本点结果,研究各因子对多弯角零件回弹的影响并在Isight中建立响应面近似模型,用Downhill Simplex算法求解近似模型的最优因子组合。利用优化后的中通道结构和工艺参数进行仿真验算,回弹绝对值的均值从原来的2.8 mm降到了0.7 mm,说明该方法能对多弯角零件回弹进行优化控制。Aiming at large springback of multi-fillet parts influenced by large amount of factors,a springback controlling method of multifillet parts was proposed considering the structure of parts and process parameters. The reason of the springback was analyzed theoretically. According to the characteristics of the multi-fillet parts,five main factors including the number of stiffeners,blank holder force,fillet radius,angle between the surfaces and drawbead coefficient were selected,and the Box-Behnken experimental design was used to explore the influence of each factor on springback. Based on the results of the sample points obtained by simulation with AutoForm software,the influence of each factor on springback of the multi-fillet parts was studied and the approximation model of the response surface was established in Insight. And the Downhill Simplex algorithm was used to solve the optimal factors combination of the approximation model. The optimized middle-channel structure and process parameters were used for simulation,and the mean value of the springback absolute value is reduced from 2. 8 to 0. 7 mm. The results show that the method can realize the optimization control for springback of the multi-fillet parts.

关 键 词：回弹控制 多弯角 结构设计 工艺优化 板料成形 

分 类 号：TG386[金属学及工艺—金属压力加工]