TWO-ELECTRODE SIMULTANEOUS WELDING DEVICE, AND TWO-ELECTRODE SIMULTANEOUS WELDING METHOD

PROBLEM TO BE SOLVED: To provide a two-electrode simultaneous welding device and a two-electrode simultaneous welding method capable of solving the problems in which the GMA welding of the recent years is varied in the period of an electric current waveform at each time when a welding power source detects the welding state, so that the GMA and the non-consumable welding phase are deviated, if the GMA welding and non-consumable welding are mutually performed at a constant interval, to cause an interference of arcs in any way thereby to make it difficult to weld stably.SOLUTION: An electric current waveform of GMA welding is directly detected to determine a low current region having no interference of an arc so that the simultaneous welding is performed while making controls, in which an arbitrary timing, an arbitrary period and non-consumable welding can be performed.SELECTED DRAWING: Figure 1 【課題】 近年のGMA溶接は溶接状態を溶接電源が電圧、あるいは電流から検知し、その時々で電流波形の周期が変化する。このために、一定間隔でGMA溶接と非消耗性溶接を相互に行うと、GMAと非消耗性溶接の位相にズレが生じ、いずれアークの干渉が生じ、安定した溶接が困難となる。【解決手段】 GMA溶接の電流波形を直接検知し、アークの干渉が生じない、低電流領域を判断し、その間に任意のタイミング、任意の時間、非消耗性溶接を行えるような制御をしながら同時溶接を行う。【選択図】 図１