| 摘要 |
PURPOSE:To perform continuous welding under smooth supply of a wire by positioning a wire supply nozzle to face the inside of a single-Vee groove in a flat position from the front side of base metals and directing the blow-off port of a gas supply chamber from the rear to the front side of the base metals. CONSTITUTION:The rear side of a wire feed nozzle 5 of which the curved part faces the inside of a single-Vee groove 10 in a flat position is positioned to face the space between both edges Z and Z of the groove 10 which is made wider on the rear side. The danger of contact of the curved wire feed nozzle 5 with both edges Z, Z in the groove 10 on the rear side where viewing is difficult is prevented and the disposition of a chip 5a in an adequate position with respect to a welding pool 13 is made possible. The bending angle of the nozzle 5 curving in the groove 10 along a welding axis 8 is therefore increased, by which the feed of a welding wire 7 is made smooth and continuous welding is made possible. Since the blow-off port 6a of a gas supply chamber is directed from the rear to the front side, the disposition of a gas supply chamber 6 on the front side is unnecessary and the monitoring of the arc generating state is made easy. |
