| 摘要 |
PURPOSE:To obtain a welded joint having a high quality, by plastically deforming a welding wire to a special shape, feeding it by making it have constant bend width, automatically oscillating a welding arc in the plate thickness direction of a material to be welded, and obtaining uniform penetration depth in the plate thickness direction of the material to be welded. CONSTITUTION:Welding wires 6a, 6b are plastically deformed to a waveform of bend width W, for instance, by a gear, etc., and are fed through a rectangular hole corresponding to bend width W of a chip 4'. When a generation point of a welding arc 13 by the welding wire 6a is denoted as a point (m), in the following moment, the welding wire 6a descends to a position (n), and the generation point of the welding arc moves to a point (n). The distance where the generation point of this arc 13a, 13b moves to the point (n) from the point (m) corresponds to the bend width W of the welding wire, and by only varying this bend width W in accordance with the plate thickness of a base material 3, the welding arc is oscillated automatically. |
