LASER BEAM MACHINING AND LASER BEAM MACHINE

摘要

Beam distributing/shaping units 21a and 21b the number of which is the same as the number of heads 7a and 7b are disposed in series with each other on an optical path of a laser beam 2 radiated from a laser oscillator 1. Then, the beam distributing/shaping units 21a and 21b are operated so that a laser pulse is supplied to one of the heads which has been positioned. By selecting the timing for operating the beam distributing/shaping units 21a and 21b, the laser beam 2 having energy the magnitude of which is substantially fixed is supplied to a portion to be machined. Thus, the laser oscillator is used effectively, and the machining energy is controlled accurately so that a high-quality hole can be machined.