Patent ID: 7745758
Filing Date: 2010-06-29
Classification: B23K

Abstract:
1. An arc start method in a consumable electrode type arc welding method for executing welding by generating arc between a front end of a wire and a base metal while feeding the wire, wherein at arc start time at a welding start point, at a portion of the wire projected from a welding tip, comprising the sequential steps of: generating an arc to preheat a front end portion of the wire to a temperature higher than a temperature of a portion of the wire near the welding tip prior to start of welding, the arc being produced by a current lower than a welding current in a spot-like shape at a position near a terminal end portion of a predetermined welding line; carrying out arc spot welding at a welding terminal end position; proceeding from the welding terminal end position to a welding start position; and starting an arc at the welding start position.