| 摘要 |
PROBLEM TO BE SOLVED: To provide a tandem pulse arc welding control apparatus that provides superior welding quality. SOLUTION: The tandem pulse arc welding control apparatus 3, 3a includes: a pulse waveform selection circuit 32; a voltage detector 18b, a voltage setting unit 24b, a pulse-peak-current-reference-value setting circuit 36; a pulse-base-current-reference-value setting circuit 38; an error amplifier 25b that calculates a pulse-peak-current variation value and a pulse-base-current variation value; an adder 37 that calculates the pulse-peak-current value by adding the pulse-peak current variation value and the pulse-base-current variation value; an adder 39 that calculates the pulse-base-current variation value and the pulse-base-current value; a pulse-waveform selection circuit 40 that outputs the pulse-peak-current value in a pulse peak period, and that outputs the pulse-base-current value in a pulse base period; and an output control circuit 35b that controls a current value for a second welding wire 19b. COPYRIGHT: (C)2010,JPO&INPIT |
