脉冲参数对脉冲MIG焊焊接行为的影响

Effect of Pulse Parameters on Welding Behavior of Pulsed MIG Welding

针对自行开发的软开关逆变电源,设计了一个工艺实验平台,用于研究脉冲参数对脉冲氩弧(M IG)焊熔滴过渡的影响规律.实验根据一脉一滴的原则,通过改变峰值电流、峰值时间、基值时间,采用小波分析仪采集焊接过程的电流电压信号,并用高速摄像机获取熔滴过渡图像,结合两者处理结果进行分析.结果表明,脉冲参数直接影响熔滴过渡过程,峰值电流和峰值时间之积对熔滴过渡影响显著,基值时间和基值电流对熔滴过渡影响不大.

An experiment platform for a self-developed the effects of pulse parameters on the droplet transfer of soft-switching inverter power supply was designed to reveal pulsed MIG welding. In the experiments, the peak current, the peak current duration and the base current duration were changed in accordance with the ＂one droplet per pulse＂ principle. The current and voltage signals in the welding process were collected by using a wavelet analyzer, and the images of droplet transfer were captured via a high-speed camera. Then, both the electric signals and the droplet transfer images were comprehensively analyzed. The results show that the pulse parameters directly affect the droplet transfer, especially the product of peak current and peak current duration, while the base current duration and the base current have slight effect on the droplet transfer.