摘要
基于SimuFact模拟分析软件,对新能源汽车空心电机轴复合成形工艺的多工序进行数值模拟分析与优化。研究结果表明:在热挤压成形过程中,等效塑性应变主要集中在靠近凸模前端的位置,材料沿轴向两端流动;经过径向锻造后,电机轴空心段的等效塑性应变沿直径方向先减小后增大,台阶段的等效塑性应变沿直径方向逐渐增大。经正交实验优化后的冷径向锻造工艺参数为:锤头相对转角为18°、锤头下压量为1.0 mm、锤头入模角为22°、坯料进给量为1.0 mm。在此基础上,成功地研制出一种通过热挤压结合冷径向锻造复合成形的新能源汽车空心电机轴,并分析了复合成形工艺对空心电机轴的微观组织及晶粒细化的影响。
Based on the SimuFact simulation and analysis software,the multi-process of composite forming process for hollow motor shaft of new energy vehicles was numerically simulated and optimized.The results show that the equivalent plastic strain is mainly concentrated near the front end of punch,and the material flows along the two axial ends during the hot extrusion forming process.The equivalent plastic strain at the hollow section of motor shaft firstly decreases and then increases along the diameter direction after radial forging,and the equivalent plastic strain at the step section increases gradually along the diameter direction.The cold radial forging process parameters optimized by orthogonal experiment are the relative rotation angle of hammer head of 18°,the hammer head depression amount of 1.0 mm,the hammer head die entry angle of 22°,and the billet feeding amount of 1.0 mm.On this basis,a kind of hollow motor shaft for new energy vehicles formed by the composite forming of hot extrusion and cold radial forging was successfully developed,and the influences of the composite forming process on the microstructure and grain refinement of hollow motor shaft were analyzed.
作者
陈建伟
周志明
桑卓越
方飞松
罗荣
王军军
涂坚
黄灿
Chen Jianwei;Zhou Zhiming;Sang Zhuoyue;Fang Feisong;Luo Rong;Wang Junjun;Tu Jian;Huang Can(School of Materials Science and Engineering,Chongqing Univerisity of Technology,Chongqing 400054,China;Chongqing Mingliyun Lightweighet Research Institute Co.,Ltd.,Chongqing 400054,China;Chongqing Hechuang Nanotech Co.,Ltd.,Chongqing 400054,China;Chongqing Jianshe Industry Co.,Ltd.,Chongqing 400054,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2023年第4期8-15,共8页
Forging & Stamping Technology
基金
重庆市人才计划项目(2020RC22)
重庆市巴南区科技计划项目(2021TJZ013)。
关键词
空心电机轴
复合成形
热挤压
冷径向锻造
等效塑性应变
hollow motor shaft
composite forming
hot extrusion
cold radial forging
equivalent plastic strain
