| 摘要 |
PURPOSE:To furnish the shielding gas nozzle capable of avoiding the adverse influence by spatters scattered from a weld zone or reflected light from a work in the shielding gas nozzle used for laser beam welding. CONSTITUTION:In the shielding gas nozzle 1 for laser beam welding provided with a center nozzle 2 to pass a laser beam L and inject assisting gsa and a side nozzle 3 which is provided around the above-mentioned center nozzle 2 and injects shielding gas, the above-mentioned side nozzle 3 is formed of an aggregate 7 of cylindrical nozzles. Further, an external shape at the shielding gas injection side of the side nozzle 3 is made almost conical to constitute the shielding gas nozzle 1 for laser beam welding. |
