| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a laser beam machining device which can prevent firing and can machine safely. <P>SOLUTION: In a laser beam machining device which blows an assist gas to assist burning of oxygen or the like during laser beam machining, a flaw preventing member 14 is provided to a contact part (surface) of the metal sheet 1 and a work support lower part 13 for the purpose of protecting it. Also, on the side face of the work support lower part 13 into which the assist gas 3 after use is flowed, for example, a vent hole 16 to flow in the atmosphere inside is provided, firing of an object in the vicinity of a machining point can be prevented by reducing the concentration of the assist gas 3 inside the work support lower part 14. <P>COPYRIGHT: (C)2003,JPO</p> |
