| 摘要 |
PURPOSE:To make a beam route length of a laser beam up to working point constant even in the case that working point travels in wide range with simple constitution and to keep a laser power at working point constant even in the case that a laser oscillator output is fixed. CONSTITUTION:A device is provided with a mirror shaft 2 arranged in parallel with a laser nozzle travel shaft 1, a mirror block 5 installed on the mirror shaft 2 so as to reflect in parallel by shifting a beam axis of a laser beam 7 and a drive transmitting device constituted from a servo motor 3 and gear 4, in which a traveling quantity of the mirror shaft 2 becomes 1/2 of that of the laser nozzle traveling shaft 1. At seeing from a laser beam incidence part, the mirror block 5 is placed on the mirror shaft 2 on far side of the intermediate point of the laser nozzle traveling shaft 1, the mirror block 5 is traveled synchronously with a movement of the laser nozzle traveling shaft 1. |
