| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laser nozzle capable of efficiently removing dross and suppressing degradation in the quality of a laser-processed member.SOLUTION: A laser nozzle includes: an internal channel that includes a first opening supplying a laser beam and an assist gas, a second opening disposed on at least part of a circumference of the first opening, a throat portion to which a shielding gas from a shielding gas supply source is supplied, a diffusion portion connecting the throat portion to the second opening and having a cross-sectional area increasing toward the second opening; and an introduction channel having one end portion connected to the throat portion and the other end portion connected to an external space, and introducing a fluid from the external space into the internal channel. A mixture fluid of the shielding gas from the shield gas supply source and the fluid from the external space is supplied from the second opening.</p> |
