GMAW熔滴过渡主动控制模式下复合脉冲波形的设计

On the Design of the Complex Pulse Waveform in the Active Control Mode of GMAW Metal Transfer

对主动控制模式下熔滴的形成和脱离过程进行了计算,分析了各种因素对熔滴振荡和脱离过程的影响,设计了可靠实现一脉一滴过渡的复合脉冲电流波形及其脉冲参数。结果表明,在脉冲GMAW焊接熔滴过渡主动控制模式下,通过激发熔滴振荡来促进熔滴过渡可降低对焊接电流的依赖,并能实现一脉一滴的可控性过渡。

<Abstrcat> This article calculates the formation and detachment of the droplets in the active control mode based on the developed analytical model, analyzes the influence of various factors on the oscillation and detachment of the droplets, and designs the complex pulse waveform and pulse parameters which can realize the 'one drop per pulse' transfer mode reliably. The results show that under the active control mode of pulsed GMAW welding, exciting the oscillation of the droplets can help the droplets transfer, lower the critical current, and realize the controllability of the 'one drop per pulse' transfer mode.