| 摘要 |
PROBLEM TO BE SOLVED: To provide an arc-welding torch which enables improvement of a shape of a toe part of a welding bead.SOLUTION: An arc-welding torch generates arc between an electrode and a welded member during gas shield arc-welding. The arc-welding torch has: a nozzle enclosing the electrode; and a shield gas passage located between the electrode and the nozzle. The nozzle comprises: a first cylindrical part; a diffuser part; and a second cylindrical part which are arranged along an axial direction of the electrode.SELECTED DRAWING: Figure 4 |
