A numerical model of ultrasonic-assisted MIG welding droplet transfer was established, and ultrasonic vibration equation of motion was compiled by user-defined function. In several different transition modes, the comparison between the MIG and Ultrasonic-assisted MIG simulation results shows that the ultrasonic vibration makes the axial position of the welding wire shift during the droplet transition and promotes the droplet transition frequency more significantly in the droplet transition mode. Finally, the MATLAB image processing software is used to calculate the droplet size. The data comparison shows that the simulation results are in good agreement with the experimental results, which proves that the established numerical model is reasonable.

中文翻译：

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超声辅助 MIG 焊熔滴转移过程的数值模拟

建立了超声辅助MIG焊滴传递的数值模型，并通过自定义函数编制了超声振动运动方程。在几种不同的过渡模式下，MIG和超声波辅助MIG仿真结果的对比表明，超声振动使熔滴过渡过程中焊丝的轴向位置发生偏移，在熔滴过渡模式下更显着地促进熔滴过渡频率。最后利用MATLAB图像处理软件计算液滴尺寸。数据对比表明，模拟结果与实验结果吻合较好，证明所建立的数值模型是合理的。