Laser machining apparatus, has gas feeding device that supplies flushing gas to housing during operation of apparatus under overpressure relative to surroundings of housing to prevent penetration of dirt particles into housing interior

摘要

A housing (26) has a purging gas supply (62) for supplying purge gas to the housing interior (24), and a fiber holder (20) adapted to receive the fiber end (22) of optical fiber (18) leading into the housing interior. A beam-shaping optics (32) is provided in the beam direction of fiber end. A rinsing gas feeding device (60) supplies flushing gas to housing during operation of apparatus (10) under overpressure relative to surroundings of housing, to prevent loosening of fiber housing closure component (28) from fiber holder and penetration of dirt particles into housing interior.