脉冲电流对1.5 GPa级低碳钢V形弯曲回弹的影响  

Effects of pulse current on V-shaped bending springback of 1.5 GPa-grade low carbon steel

作　　者：范豇宇 洪勇 李瑞鑫 张晓超 吕知清[1] FAN Jiang-yu;HONG Yong;LI Rui-xin;ZHANG Xiao-chao;Lü Zhi-qing(Key Laboratory of Advanced Forging and Forming Technology and Science,Ministry of Education,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学先进锻压成形技术与科学教育部重点实验室,河北秦皇岛066004

出　　处：《塑性工程学报》2022年第1期79-86,共8页Journal of Plasticity Engineering

基　　金：河北省重点研发计划项目(20311003D);上海大件热制造工程技术研究中心资助项目(18DZ2253400);河北省杰出青年基金资助项目(E2017203036)。

摘　　要：利用金属材料的电致塑性效应,以1.5 GPa级高强度钢为研究对象,在板材V形弯曲成形过程中引入脉冲电流,分析模具结构及电辅助弯曲工艺对V形弯曲回弹的影响。结果表明:脉冲电流对1.5 GPa级高强度钢板的V形弯曲回弹起到了明显抑制作用,回弹角大幅度降低,并且电流沿板料长度方向施加比沿厚度方向施加作用更显著。弯曲后保持通电的比先通电保持后弯曲能更好地抑制回弹的产生。随着电流密度、通电时间以及频率的增加,回弹角逐渐减小;经过脉冲电流成形后,板料表面质量良好,回弹减小,其变形区硬度有所提高。Using the electroplastic effect of metal materials,taking the 1.5 GPa-grade high-strength steel as research object and introducing pulse current to V-shaped bending forming process of sheet metal,the effect of die structure and electrically-assisted bending process on V-shaped bending springback was analyzed.The results show that the pulse current significantly inhibits the V-shaped bending springback of 1.5 GPa-grade high-strength steel sheet.The springback angle is greatly reduced,and the effect of applying current along the length direction is more significant than that of applying along thickness direction.The springback is inhibited better by pulse current holding after bending than that before bending.With the increase of current density,conduction time and frequency,the springback angle decreases gradually.After pulse current forming,the sheet metal has good surface quality and lower springback,and the hardness of the deformation zone is improved.

关 键 词：高强度钢 弯曲回弹 电辅助成形 电塑性效应 

分 类 号：TG386[金属学及工艺—金属压力加工]