| 摘要 |
PURPOSE:To perform welding in a curved state and to improve the durability of a welding torch, by giving flexibility to the torch itself and to setting the direction of the torch by the plastic deforming performance of a coil material for conduction. CONSTITUTION:A torch body consists of an inner tube 4 provided internally with a wire supply path 5 by coiling a wire material to guide a wire to an electric feeding chip, a coil material 6 for electric conduction which is provided surrounding the external circumference of the inner tube 4 through annular space 7 for supplying shield gas and has plastic deforming performance, a flexible tube 8 formed by spirally engaging and winding metallic streaks provided to the external circumference of the coil material 6, and a heat-resisting insulating tube 9 covering the external circumference of the flexible tube 8. Thus, the torch body is given flexibility and the plastic deforming performance of the coil material 6 is utilized to perform welding operation in an adequately curved state. |
