摘要
以某汽车侧围外板为对象,通过有限元建模和激光全域扫描,对成形后的覆盖件整体扭曲回弹状态进行了研究。运用多组补偿系数对不同特征区域进行了型面偏置补偿建模分析,发现两条“等效弯曲线”以内区域为回弹补偿的弱影响区,回弹补偿效果传递较差;进一步实验发现棱线、车门框等特征造型会阻碍回弹补偿修正效果的传递。基于上述认识,提出了强、弱影响区的补偿策略,经现场实际模具调试并匹配光学扫描点云与数模,得出了分别采用激进和保守的型面补偿策略对弱区和强区进行处理后能够获得较好的回弹补偿控制精度。
Taking the automobile side panel as an object,the whole torsional springback state of the formed covering parts was studied by finite element modeling and laser full-area scanning.Both modeling and analysis of the offset compensation for characteristic areas with different compensation coefficients were carried out.It is found that the weak influence zone of the compensation is within the area of two equivalent bending lines',and the transmission of the compensation effect is poor.Further experiments show that the feature shape,such as sharp style line and door frame hinders the transmission of the springback compensation correction effect.Based on the above investigation,the compensation strategy for strong and weak influence zones was put forward.After actual die debugging and matching the optical scanning point cloud and digital model,it is found that the better control accuracy of the springback compensation can be obtained using radical and conservative compensation strategies of shape to deal with weak zone and strong zone respectively.
作者
盛小涛
苏晓渭
王锦波
王冬艳
王成勇
SHENG Xiao-tao;SU Xiao-wei;WANG Jin-bo;WANG Dong-yan;WANG Cheng-yong(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Honghai New Material Co.,Ltd.,Anqing 246121,China;Anhui Feixiang Electric Co.,Ltd.,Xuancheng 242600,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2021年第10期42-49,共8页
Journal of Plasticity Engineering
基金
2018年安徽省科技重大专项(1803901044)。
关键词
板料成形
回弹补偿
强弱影响区
光学扫描
sheet forming
springback compensation
strong and weak influence zones
optical scanning
作者简介
第一作者:盛小涛,男,1995年生,硕士研究生,主要从事塑性成形及CAE模拟研究,E-mail:xiaotaosheng@outlook.com;通信作者:王成勇,男,1972年生,博士,副教授,主要从事材料成形控制及模具强度理论研究,E-mail:wangchengyong@hfut.edu.cn。
