| 摘要 |
PROBLEM TO BE SOLVED: To stably obtain a successful arc welding state of a base material by easily suppressing fluctuation in welding voltage to be applied in arc welding of the base material, and consequently suppressing a defect of the arc welding.SOLUTION: An arc welding control device 11 includes: a voltage detection part 4; a feedback coefficient calculation part 5; an evaluation function calculation part 6; and a correction calculation part 9. The voltage detection part 4 detects welding voltage of arc welding. The evaluation function calculation part 6 calculates an evaluation function of a fluctuation amount based on a welding voltage detection value. The correction calculation part 9 gives a perturbation signal to the evaluation function, calculate a coefficient value according to the fluctuation amount of the welding voltage and subtracts the coefficient value from a reference value corresponding to a minimal value of the evaluation function to calculate a correction value of a feedback coefficient error. The feedback coefficient calculation part 5 corrects the feedback coefficient based on the correction value and supplies a corrected feedback coefficient to feedback control of wire feeding speed. |
