本文介绍了交流方波双通道等离子弧焊机。本焊机具有在焊接过程中电流通过两个不同途径,即正半波时电流由喷嘴流向工件,负半波时电流由工件流向钨极的所谓双通道的特点。试验证明,采用这一办法,增强了阴极破碎作用,使焊缝光滑美观,同时也加强了钨极冷却效果,减小了钨极烧损和对焊缝的渗钨。 This article describes the exchange of square wave dual-channel plasma arc welder. The welding machine has the current in the welding process through two different channels, that is, the current flow from the nozzle to the workpiece is positive half-wave, the negative half-wave current flows from the workpiece to the so-called dual-channel characteristics. Experiments show that using this approach to enhance the role of cathode crushing, the weld smooth and beautiful, but also to enhance the cooling effect of the tungsten, reducing the tungsten burning and tungsten penetration of the infiltration.