| 摘要 |
PURPOSE:To improve stability of welding arc by detecting electrically short circuiting and separation of a droplet then controlling the varying intensity of welding current and controlling high and low wire feed speeds, the intermission of wire feeding, forward and backward revolutions, etc. CONSTITUTION:A voltage decider 11 judges the short circuiting or separation of a molten metal from the information obtd. by a voltage detector 14 and outputs the signals corresponding respectively therewith to a motor controller 8 and a power source controller 12 in the stage of welding. The controller 8, triggered by the signal from the decider 11, controls the acceleration and deceleration of rotating speed of a motor 8 driving a feed roller 7 as well as the start, stop, forward revolution and backward revolution thereof according to the time set in a time setter 13. The controller 12, triggered by the signal from the decider 11, controls likewise a power source 9 to control the varying intensity of the welding current. The arc stability of short arc welding is thus improved. |
