Short arc welding method

TLDR: In this article, the authors proposed a method to stabilize a welding arc and prevent generation of a welding defect by detecting short circuit and detachment of a droplet, controlling welding current and oscillating a welding torch in the axial direction of the top end of the welding wire.

Abstract: PURPOSE:To stabilize a welding arc and to prevent generation of a welding defect by detecting short circuit and detachment of a droplet, controlling welding current and oscillating a welding torch in the axial direction of the top end of a welding wire CONSTITUTION:The voltage from a welding power source 7 is impressed between a welding wire 2 and objects 6 to be welded through a wire feeder 5, a welding torch body 11, etc by which welding is progressed A voltage decider 17 judges the short circuit or detachment of a molten metal upon receipt of information from a welding voltage detector 16 and outputs a signal to an electromagnet controller 19 and a power source controller 29 On the other hand, the controller 19 controls the polarity change-over of the current flowing in an electromagnet 15 according to the time set in a time setter 18 with the signal from the decider 17 as a trigger The controller 20 controls also a welding power source 7 according to the time set in a time setter 18 with the signal from the decider 17 as a trigger thereby increasing or decreasing the welding current