Patent ID: 6376802
Filing Date: 2002-04-23
Classification: B23K

Abstract:
A method of controlling a consumable electrode AC pulsed arc welding, said method comprising the steps of:repeatedly executing a cycle including: supplying a peak current sufficient to achieve a droplet transfer during a peak current supply time in an electrode positive polarity in which a welding current is supplied from a welding wire towards a workpiece to be welded; subsequently supplying an electrode negative current sufficient not to achieve the droplet transfer during an electrode negative current supply time in an electrode negative polarity in which the welding current is supplied from the workpiece to be welded towards the welding wire; and finally supplying a base current sufficient not to achieve the droplet transfer during a base current supply time in the electrode positive polarity, wherein when a re-igniting voltage, which is a base voltage established a predetermined time subsequent to start of the base current supply time, is higher than a sum of a re-igniting base voltage appearing during the previous cycle and a discriminant value of a predetermined re-igniting base voltage, a current of a value higher than the base current is supplied during a period from the timing at which the re-igniting base voltage takes a value higher than the sum to the timing at which the peak current supply time starts.