摘要
本文较深入地分析了变极性（方波交流）等离子弧焊电弧稳定性问题，并在试验基础上提出了新的方法。克服了主电弧负半波时的主、维弧相互干涉和钨板烧损等缺点，提高了电弧的稳定性。在焊接铝、镁及其合金时阴极清理作用明显。
In this paper, the arc stability of WPAW is analyzed in detail and a new method has been proposed on the basis of experiment. Being different from the conventional method in power supply and wire connection, the new method can overcome the interference of plasma arc with pilot arc and the deterioration of tungsten, improving the stability of PAW arc effectively. Tests show that adopting the new method to weld aluminium, magnesium and their alloys, the arc stabiligy, cathode cleaning and weld appearance are satisfactory.
出处
《电焊机》
1997年第3期23-26,共4页
Electric Welding Machine
