| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a jet nozzle for assist gas used for laser beam machining and a laser beam machining device in which a shape of an object to be laser beam machined is approximated to a desired shape. <P>SOLUTION: The jet nozzle for jetting assist gas to be blown on a surface to be machined in laser beam machining includes: a nozzle surface confronted to the surface to be machined; a jetting opening formed on the nozzle surface so as to make the assist gas and the laser beam pass to the outer space from the inner space; and a concaved slot formed on the nozzle surface to pass through the jetting opening. Laser beam machining is performed while cooling a cooling part which is at least one of an irradiation part of the surface to be machined to which the laser beam is irradiated, a part after irradiation, or a part before irradiation. A dehumidified gas jetting hole is provided for jetting the dehumidified gas to the surface to be machined in such a manner of being directed to the irradiation part or surrounding the irradiation part. <P>COPYRIGHT: (C)2012,JPO&INPIT |
