| 摘要 |
PURPOSE:To feed a wire in an optimum condition according to high and low feed rates in wire inching by stopping the wire feed when the closing time of an inching command switch is within set time and continuing the wire feed when said time exceeds the set time. CONSTITUTION:The wire feed is stopped by releasing the closing of the inching command switch of an arc welding machine, which welds a weld zone while feeding a consumable electrode wire or filler wire at a prescribed speed, within a set time after short-time depression of the command switch and the wire is fed only during the time when the command switch is pushed when the feed rate in wire inching is low in the stage of starting the wire inching by closing said command switch. The wire feed is continued by releasing the closed circuit after the command switch is kept pressed for the set time or above when the feed rate is high. The feed is so controlled that the wire is fed at a high speed after the set time. The wire is thus fed respectively in the optimum condition according to the high and low feed rates in the wire inching. |
