WELDING OUTPUT CONTROL METHOD AND ARC WELDING DEVICE

摘要

For a second predetermined time following a first predetermined time during an arc period after generation of arc, a superimposition voltage waveform having a predetermined amplitude and a predetermined period shorter than a short circuit period but longer than the control period of a welding power supply device is superimposed on a command voltage waveform. Consequently, an excessive growth of a droplet is prevented by suppressing the push-up growth of the droplet in the direction of a consumption electrode over the entire region from a small current region where the number of short circuits is increased to a middle and large current region where the number of short circuits is decreased. Furthermore, occurrence of sputtering is reduced by moving the droplet smoothly to a molten pool, and the appearance of beads is made flat.