Patent ID: 8212176

Claim:
A machining head comprising: a machining head element having an inner-head channel formed therein to provide a passageway for laser light and assist gas; a nozzle formed separately from said machining head element, said nozzle having an inner-nozzle channel formed therein to connect to the inner-head channel and a nozzle orifice through which the laser light and the assist gas are directed toward a work, the nozzle orifice being formed at an extreme downstream end of said nozzle; pins formed to protrude radially from a side wall of said nozzle; a pin-locking part formed on a side wall of said machining head element, the pin-locking part having pin-fitting openings to allow said pins to be passed through and then placed in direct contact with and locked in position on the pin-locking part; a head alignment part formed on a nozzle-side end surface of said machining head element; a nozzle alignment part formed on said nozzle at a location where said nozzle is aligned with said machining head element; and an elastic member fitted between the head alignment part and said nozzle in a closed loop form to create a clearance between the head alignment part and the nozzle alignment part for mutual alignment.