基于外加纵向磁场的MIG熔滴过渡数值模拟  

Numerical Simulation of MIG Droplet Transfer Based on External Longitudinal Magnetic Field

作　　者：黄泽涵 韩绍华[1] 薛丁琪[1] 顾天奇 HUANG Zehan;HAN Shaohua;XUE Dingqi;GU Tianqi(School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]福州大学机械工程及自动化学院,福建福州3350116

出　　处：《热加工工艺》2023年第1期127-130,共4页Hot Working Technology

基　　金：福建省自然科学基金资助项目(2017J05077)。

摘　　要：为研究外加纵向磁场对熔化极气体保护焊接的熔滴温度、尺寸、滴落速度的影响规律,选用ER304不锈钢焊丝,氩气为保护气,建立了考虑外加纵向磁场的二维轴对称熔滴过渡数值模型,模拟的熔滴尺寸结果与试验结果吻合较好。结果显示:当其他焊接参数不变时,在一定范围内随着外加纵向磁场的增大,脱落时刻熔滴径向长度逐渐增大,轴向长度逐渐减小,形状由长球形变为扁球形,过渡频率逐渐减小。但外加纵向磁场对熔滴脱落时刻温度、滴落速度的影响是间接的且较小。In order to study the influence of external longitudinal magnetic field on the droplet temperature, size and velocity of MIG welding, ER304 stainless steel wire was selected and argon was used as shielding gas, a two-dimensional axisymmetric droplet transfer numerical model considering external longitudinal magnetic field was established, the simulation results are in good agreement with the experimental results. The results show that when other welding parameters remain unchanged, the radial length of droplet at detaching time gradually increase and the axial length of droplet gradually decreases with the increase of the longitudinal magnetic field intensity within a certain range, the shape changes from long spherical to oblate spherical, and the transition frequency gradually decreases. But the effect of the external longitudinal magnetic field on the temperature and velocity of droplet is indirect and small.

关 键 词：熔滴温度 外加磁场 数值模拟 

分 类 号：TG444.74[金属学及工艺—焊接]