高强钢热冲压结构件三维激光切割回弹规律及精度补偿方法  

Rebound Law and Precision Compensation Method of Three-dimensional Laser Cutting of High Strength Steel Hot Stamping Structural Parts

作　　者：李守港 刘鹏 刘祥 胡志力[1,2,3] LI Shougang;LIU Peng;LIU Xiang;HU Zhili(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan,430070;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan University of Technology,Wuhan,430070;Hubei Engineering Center of Material Green Precision Forming Technology and Equipment,Wuhan,430070;Dongfeng(Wuhan)Industrial Co.,Ltd.,Wuhan,430040)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,武汉430070 [2]武汉理工大学汽车零部件技术湖北协同创新中心,武汉430070 [3]武汉理工大学材料绿色成形技术与装备湖北省工程中心,武汉430070 [4]东风(武汉)实业有限公司,武汉430040

出　　处：《中国机械工程》2022年第22期2741-2747,共7页China Mechanical Engineering

基　　金：国家重点研发计划(2019YFB1704500);国家自然科学基金(52075400);湖北省重点研发计划(2020BAB140)。

摘　　要：为了减小高强钢车身结构件三维激光切割过程中回弹缺陷对切割精度的影响,将热冲压后的高强钢车身构件应用于三维激光切割,研究其回弹特性。以某车型的高强钢车身结构件A柱为研究对象,利用有限元仿真软件AUTOFORM与ABAQUS分别建立了热冲压和激光切割有限元模型,通过数值模拟得到回弹值分布图,揭示了车身结构件在切割后轮廓的回弹规律。根据基于回弹预测的直接补偿方法对轮廓进行补偿以确定最佳切割轮廓,对A柱冲压半成品进行切割试验验证,试验结果表明,所提补偿方法能够将轮廓误差控制在公差范围内,轮廓误差减小约28.5%,型面回弹减小约38.3%,验证了该补偿方法的有效性。In order to reduce the influences of springback defects on the cutting accuracy in the three-dimensional laser cutting of high-strength steel body structures,the rebound characteristics was studied by applying three-dimensional laser cutting of hot stamped high-strength steel body components.For high-strength steel car body structure A-pillar,hot stamping and laser cutting finite element models were established respectively by the finite element simulation software AUTOFORM and ABAQUS respectively.The rebound value distribution diagram was obtained through numerical simulation,and the rebound law of the contour of the body structures after cutting was found.The optimal cutting contour was determined according to the direct compensation method based on rebound prediction.The compensation method was validated by cutting the A-pillar semi-finished products.The results show that the contour may be controlled within the tolerance range,the contour errors are decreased by about 28.5%,and the profile rebound is decreased by about 38.3%,by the proposed compensation method,which verify the effectiveness of the compensation method.

关 键 词：三维激光切割 轮廓精度 回弹 高强钢 

分 类 号：TG156[金属学及工艺—热处理]