Patent ID: 8203100

Claim:
A pulse arc welding method for performing welding by causing welding current to flow through a welding wire and a base metal via a power supply tip so that an arc is ignited between the welding wire and the base metal, and the arc causes a molten droplet to transfer from the welding wire and the base metal, the welding current having a pulse cycle made up of a first peak time, a second peak time and a base time, the method comprising the steps of: applying a first peak current during the first peak time; applying a second peak current during the second peak time, the second peak current being smaller than the first peak current; and applying a base current during the base time; wherein when a tip-base distance between an end of the power supply tip and the base metal is smaller than a reference value, the first peak current is increased in accordance with a difference between the reference value and the tip-base distance.