New Concept for the Characteristic of an Arc Welding Power Source (Report II) : New Development of Arc Control System for CO_2 Welding(Physics, Processes, Instruments & Measurements)

High spatter levels and shallow weld penetration are the two critical problems during CO_2 shielded arc welding. Differing from previous control methods, a new composite control characteristic for a power source is proposed. It provide in a self-adaptive close-loop control system for the welding arc. With this control method, a softer arc with less spattering, controllable weld penetration and higher metal transfer frequency can be obtained.