| 摘要 |
PROBLEM TO BE SOLVED: To improve the stability of arc welding for periodically repeating the forward feed and the reverse feed of a weld wire. ! SOLUTION: In an arc welding control method for periodically repeating a forward feed period and a reverse feed period of a feeding speed Fw to weld by controlling an output of a weld power source at constant voltage, and by repeating a short circuit period and an arc period, a fluctuation in the weld current Iw to the weld voltage Vw during the arc period is controlled during the forward feed period Tas to be made smaller than during the reverse feed period Tar. This fluctuation control is made by setting the gain Gr of constant voltage control during the forward feed period Tas smaller than the reverse feed period Tar. This process can suppress an increase in the weld current Iw during the forward feed period Tas during an arc period, so that a short circuit generation timing can be made constant to improve the stability of a welding state. ! COPYRIGHT: (C)2015, |
