| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent control errors and to improve cost effectiveness by controlling laser generator output, based on the quantity of heat imparted to a cooling medium in the cooling means by means of a laser beam during the interruption of machining such as attaching/detaching of a work. SOLUTION: In laser beam machining on a work W, in order to avoid irradiation to the machining position during the attaching and detaching of the work W in the position, a beam damper 3 which is a cooling means and a shutter mirror 4 whose opening/closing is controlled are provided between the laser generator 1 and the work W, with the laser beam R reflected to the beam damper 3 by closing the mirror 4. Simultaneously, with cooling water circulated in the beam damper, using a temperature sensor 31, 32 and a flow sensor 33 attached to the feed water pipe 51 and the distributing pipe 52, the quantity of heat is determined that are imparted to the cooling water by emitting the laser beam R to the beam damper 3. From this quantity of heat, an output controller 2 operates the output of the laser generator 1, controlling the feedback so that the output is equalized to a preset value.</p> |
