METHOD FOR CONTROLLING GAS METAL ARC WELDING, METHOD FOR SETTING WELDING CONDITION, WELDING CONTROL DEVICE, WELDING POWER SUPPLY, WELDING SYSTEM, PROGRAM, GAS METAL ARC WELDING METHOD, AND ADDITIVE MANUFACTURING METHOD

Abstract

Provided is a method for controlling gas metal arc welding with which it is possible to obtain an optimum deep penetration performance corresponding to the situation and an excellent bead shape, irrespective of the welding speed, when welding a thin plate. This method for controlling gas metal arc welding in which a shielding gas containing 30% or more of CO2 is used and the material to be welded is a thin plate, feeding and welding current control being performed upon switching the welding current between at least a current non-suppression period TIP and a current suppression period TIB, includes: a short-circuit-time ratio-determining step for determining, if there is at least one cycle including an arc period and a short-circuit period within a predefined time, the ratio of the short-circuit period relative to the predefined time; and a welding-condition-determining step for setting or correcting a welding condition such that the ratio of the short-circuit period determined in the short-circuit-time ratio-determining step is, at least, equal to or less than a predefined threshold or a calculated threshold, or equal to a predefined target value or a calculated target value.

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