ARC WELDING APPARATUS, ARC WELDING SYSTEM, AND ARC WELDING METHOD

摘要

Provided is an arc welding apparatus capable of controlling welding voltage while suppressing spatter increase. An arc welding apparatus A1, performing welding while repeatedly generating a short circuit state and an arc state, includes a differential calculation unit U2 deducting a welding voltage from a target voltage to calculate a differential voltage; a velocity setting unit U3 setting forward movement velocity and backward movement velocity of a welding wire (44) with respect to a work W in such a way that a ratio of the backward movement velocity to the forward movement velocity becomes greater as the differential voltage becomes greater; and a feeder (41) driving the welding wire (44) in the forward movement velocity and the backward movement velocity.