| 摘要 |
<p>A consumable electrode type pulse arc welding machine is provided with means for controlling a welding output of the welding machine and the control means comprises a short-circuiting detector circuit (1, 2, 3) for detecting the number of times of short-circuiting n occurring between an electrode wire and a weld part of a base metal at predetermined time intervals during a welding operation, a processing unit (4, 6, 8, 9, 12:28) for calculating nd = ns - n, where ns is a preset number of short-circuiting times, and a control means (13, 14, 15) for controlling a welding output of the welding machine by decreasing the welding arc voltage in accordance with the magnitude of nd, when nd is larger than zero, and by increasing the welding arc voltage in accordance with the magnitude of ¦nd¦, when nd is smaller than zero.</p> |
