| 摘要 |
<p>A laser cutting nozzle configured such that a laser beam is irradiated through a nozzle hole formed in a nozzle main body from an opening of the nozzle hole, and an assist gas surrounding the laser beam is emitted. The nozzle hole includes a first control flow path, a second control flow path, and a third control flow path formed in a coaxial cylindrical shape, in sequence from upstream toward downstream in a flow direction of the assist gas. If a diameter of the first control flow path isφA, a diameter of the second control flow path isφB, and a diameter of the third control flow path isφC, an equationφA<φC<φB is satisfied.</p> |
