超声-MIG焊熔滴过渡的数值模拟  

Numerical simulation of droplet transition in ultrasonic-MIG welding

作　　者：黄泽湃 李会军 王瑞超 王皓[1] Huang Zepai;Li Huijun;Wang Ruichao;Wang Hao(Wuyi University,Jiangmen 529020,Guangdong,China)

机构地区：[1]五邑大学,广东江门529020

出　　处：《焊接》2021年第2期29-33,63,共6页Welding & Joining

基　　金：江门市创新科研团队引进资助项目(2018630100090019844)

摘　　要：基于流体力学和电磁学理论,通过添加超声振动和声辐射力条件,建立超声辅助的熔化极惰性气体保护焊(超声-MIG)熔滴过渡行为的数学模型。利用FLUNET软件模拟在不同焊接电流和超声振幅下熔滴长大、变形和脱落的过程。模拟结果显示,熔滴的轮廓变化和脱落时间与相关试验结果吻合较好;与常规MIG焊相比,在小电流条件下超声-MIG焊熔滴的脱落尺寸相对更小且过渡频率更快,而在大电流的条件下超声-MIG焊熔滴脱落时间和尺寸变化不太明显;超声-MIG焊熔滴脱落时间受超声振幅的影响,超声振幅的增大会在一定程度上使熔滴过渡周期缩短。Based on theories of fluid mechanics and electromagnetics,the mathematical model of the transition behavior in ultrasonic assisted metal inert gas welding(ultrasonic-MIG)was established by adding ultrasonic vibration and radiation force conditions.FLUNET software was used to simulate the droplet growth,deformation and shedding under different welding currents and ultrasonic amplitudes.The simulation results showed that the droplet profile change and shedding time were in good agreement with the related test results.Compared with conventional MIG,the drop size of ultrasonic-MIG droplet was smaller and the transition frequency was faster under the condition of low current,while the drop time and size of ultrasonic-MIG droplet changed less obviously under the condition of high current.The dropping time of ultrasonic-MIG droplet was affected by ultrasonic amplitude,and the increase of ultrasonic amplitude could shorten the droplet transition period to some extent.

关 键 词：超声-MIG 熔滴过渡 数值模拟 超声辐射力 

分 类 号：TG444[金属学及工艺—焊接]