Patent ID: 6335507
Filing Date: 2002-01-01
Classification: B23K

Abstract:
A laser-beam machining device including an automatic nozzle exchanging means for automatically exchanging a nozzle to be mounted to a mounting head for carrying out machining to pierce or cut a machining target by irradiating a laser beam outputted from a laser oscillator to the machining target in a converged state through a nozzle hole, and simultaneously jetting assist gas through said nozzle hole, comprising:a cutting nozzle; and a piercing nozzle having a hole diameter not exceeding 2.5 mm which is larger than a converged laser beam diameter but smaller than a hole diameter of said cutting nozzle; wherein the piercing is carried out by mounting said piercing nozzle to the machining head by means of said automatic nozzle exchanging means at the time of piercing.