| 摘要 |
PURPOSE:To make good titled welding possible without increasing shielding gases unnecessarily in the stage of welding a narrow groove by giving waveform plastic deformation to a welding wire by increasing the radius of curvature in the peak part of the wave by using the wire of prescribed tensile strength. CONSTITUTION:In the stage of feeding a welding wire 3 to weld zones, the feed rollers for the wire 3 are oscillated by a prescribed angle, by which plastic deformation of waveform is given to the wire 3 and automatic welding is performed. Here, the radius R of curvature at the vertix X in the curving part of the wire 3 is increased by selecting a welding wire material of 90-50kgf/mm.<2> tensile strength. Then, the stagnation time of the arc formed by the wire 3 can be taken longer, and the good joining of the base materials and weld beads is effected by sufficient melting of the side wall parts. |
