Control methods and welding wire retract control device of retraction of the welding wire

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for controlling retraction of a welding wire by which the wire retraction can be performed without any confliction of the retractive feed by a main feeder with the advancing feed by an auxiliary feeder when performing the retraction by using the auxiliary feeder which is realized by a simple control system by using an inexpensive induction motor or the like.;SOLUTION: A welding power source PS controls a main feeder 30 including a motor 36, and an auxiliary feeder 50 for giving the feeding force against the friction resistance generated in conduits 60A, 60B by performing the torque control of the output of a feed motor 56 to a welding wire. The welding wire 40 is subjected to the push-pull feed to a welding torch 10, and the welding wire 40 is retracted by the control of the retractive feed (the reverse feed) by the main feeder 30 during the retraction. The welding power source PS stops the feed motor 56 of the auxiliary feeder 50 during the entire retraction time.;COPYRIGHT: (C)2008,JPO&INPIT