METHOD FOR HIGH SPEED WEAVING OF LASER BEAM

摘要

PROBLEM TO BE SOLVED: To provide a method for high speed weaving required for stable welding of a thick plate by a high output laser beam. SOLUTION: Driving device 6, 7 comprising a piezoelectric element or the like are equipped to oscillate a tip end of optical fibers 1 at a high speed for guiding a high output laser beam outputted from a laser beam source, and laser beams 8 emitted out of a front end surface of optical fibers to rapidly change emitting position are converged at a welding position 3 by a condensing lens 2. Or, it is likewise attainable to equip an acoustooptical deflector on a laser optical path in a space for an incident high output laser to reach the condensing lens and to make the laser beam execute weaving through ultrasonic operation.