トーチノズル

Abstract

A substantially U-shaped discharge groove 14 is formed at a base material-side end of a torch nozzle 1, and a specific gas received from a reception port 13 is discharged from the substantially U-shaped discharge groove 14. Therefore, for example, when the surface diameter of a molten pool reaches the prescribed size, the specific gas is discharged to the molten pool when the operator operates a remote controller. As a result, the molten base material of the molten pool moves on the base material by the discharge of the specific gas. When the molten base material moves on the base material, the temperature difference between the molten base material and the base material is large, and thus the molten base material does not become fused to the base material even if the molten base material solidifies on the base material. Therefore, the base material can ultimately be fusion-cut by repeating work for moving, using the specific gas, the molten base material of the generated molten pool while melting the base material by arc discharge, that is, repeating chipping work on the base material.

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