基于感应加热的镁合金带内筋筒形件热强旋旋前温度场研究  

Study on temperature field before hot power spinning for magnesium alloy cylindrical part with inner ribs based on induction heating

作　　者：江鹏 夏琴香[1] 龙锦川 肖刚锋[1] Jiang Peng;Xia Qinxiang;Long Jinchuan;Xiao Gangfeng(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《锻压技术》2021年第3期111-117,共7页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(51775194)。

摘　　要：对于镁合金带内筋筒形件的热强旋成形,旋前管坯的温度场分布对成形过程中的材料流动及旋压件的成形质量具有重要影响。基于多物理场耦合软件COMSOL,建立了ZK61镁合金带内筋筒形件热强旋旋前管坯电磁感应加热模型,模拟分析了不同感应加热参数条件下管坯温度场的分布情况,并通过实验验证了模型的可靠性。研究结果表明:相比电流强度,电流频率对管坯表心温差的影响更为显著,随着电流频率及电流强度的增加,管坯表心温差均逐渐增大;感应线圈的匝数及线圈与管坯的间距对管坯表心温差的影响较大,随着线圈匝数的增大,管坯表心温差近似呈指数形式增加,线圈与管坯的间距越大,管坯表心温差越小。For the hot power spinning of magnesium alloy cylindrical part with inner ribs,the temperature field distribution of cylindrical blank before spinning has an important influence on the material flow and forming quality of spinning part in the forming process. Therefore,the electromagnetic induction heating model of cylindrical blank before hot power spinning of ZK61 magnesium alloy cylindrical part with inner ribs was established by the multi-physics coupling software COMSOL,the temperature field distribution conditions of cylindrical blank under different induction heating parameters were simulated and analyzed,and the reliability of model was verified by experiment.The results show that compared with the current intensity,the current frequency has a more significant influence on the temperature difference between the surface and core of cylindrical blank,and with the increasing of current frequency and current intensity,the temperature difference between the surface and core of cylindrical blank gradually increases. Furthermore,the induction coil turns and the distance between coil and cylindrical blank both have significant influences on the temperature difference between the surface and core of cylindrical blank. As the number of coil turns increases,the temperature difference between the surface and core of cylindrical blank increases exponentially,and the larger the distance between coil and cylindrical blank is,the smaller the temperature difference between the surface and core of cylindrical blank is.

关 键 词：ZK61镁合金 带内筋筒形件 热强旋 感应加热 温度场 

分 类 号：TG306[金属学及工艺—金属压力加工] TH161.2[机械工程—机械制造及自动化]