| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of defective welding due to spatter. SOLUTION: In this plasma welding torch 2, an outer circumferential surface 12s of a nozzle 12 for ejecting the plasma arc is surrounded by an outer cylindrical conductive body 14 and a conductive forward cylindrical body 20 connected to a tip of the outer cylindrical body 14, a shield gas passage 14t is formed around the nozzle 12, and a tip of the forward cylindrical body 20 is brought into contact with a work W during the welding. The nozzle 12 and the outer cylindrical body 14 are electrically connected to each other, and an insulating member 16 for electrically insulating these components is provided between the outer cylindrical body 14 and the tip cylindrical body 20. No defective welding is generated even when the spatter entering the shield gas passage 14t is stocked between the nozzle 12 and the outer cylindrical body 14.
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