| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laser machining apparatus, in which an optical component can be protected more properly. <P>SOLUTION: The laser machining apparatus 1 has a nozzle that generates flow of gas from a protection member side toward a machining point side in a space between a machining point and a protection member. The nozzle includes: a first flowing path part for guiding the gas to the circumference of an optical path of a laser beam condensed by a light collector; and a second flowing path part formed continuously with the first flowing path part, guiding the gas along the surface of the protection member from the circumference of the laser beam condensed by the light collector toward a center, and guiding the gas along the optical path of the laser beam condensed by the light collector from the protection member side toward the machining point side. The second flowing path part is formed by an inverted cone-shaped cavity where a flowing path diameter is gradually reduced from the protection member side toward the machining point side. <P>COPYRIGHT: (C)2012,JPO&INPIT |
