| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laser cut machining device for an extra thin metal plate wherein the variation in the position of a condensing point by an assist gas is restrained with a simple constitution. SOLUTION: On the lower part of a machining head 3, a holder 7, which encloses the outer periphery of a nozzle 6, and whose distance to the lower end coincides with a focal distance of a laser beam, is provided, and a support plate 12 energized upward by an elastic member 14 is provided direct below the machining head 3. In this way, the work W is energized upward by the elastic member to come into close contact with the holder 7, thereby the distance from a condenser lens 4 to the surface of the work can be always made constant.</p> |
