PULSE MAG ARC WELDING METHOD

摘要

PURPOSE: A pulse MAG(metal active gas) arc welding method is provided to promptly solve a short circuit by ascending welding current or flowing the welding current of a certain magnitude for a certain period of time when the shirt circuit is generated during welding. CONSTITUTION: In a welding between a base metal and a feeding wire by a pulse MAG arc welding method of 1 pulse and 1 drop, the pulse MAG arc welding method comprises a first step of setting threshold voltage of welding voltage; a second step of determining whether or not welding voltages per each sections are the same as or lower than the threshold voltage by diving the section into pulse ascent, pulse maintenance, pulse descent and pulse base sections; a third step of judging whether the duration time exceeds the already set certain time or not in case that the welding voltages per each sections are the same as or lower than the threshold voltage as results of the judgement; and a fourth step of solving the short circuit by ascending the welding voltage after judging the case that the duration time exceeds the already set time as a short circuit between the base metal and the feeding wire.