| 摘要 |
PROBLEM TO BE SOLVED: To accurately control an arc length by removing, from a welding voltage, an abnormal voltage after the release of a short circuit for example and also to suppress excessive fluctuation of the arc length at the arc starting time in pulsed arc welding. SOLUTION: In the method for controlling pulsed arc welding, a welding voltage is detected, with the detected value restricted within a prescribed varying range Vc±ΔVc from the reference voltage waveform of a pulsed waveform, and with a welding voltage limit value Vft calculated. Then, the output of a welding power source is controlled so that an average value of the welding voltage limit value Vft is nearly equalized to a predetermined voltage set value. At the arc starting time, the reference voltage waveform Vc is set at a prescribed initial reference voltage waveform, wherein the varying rangeΔVc is set at a larger value in the transient period Tt of the arc starting time than in the normal state, in the method for controlling pulsed arc welding at arc starting time. COPYRIGHT: (C)2006,JPO&NCIPI
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