LASER BEAM MACHINING AND LASER BEAM MACHINE

摘要

As many beam distributing/shaping devices (21a, 21b) as the number of heads (7a, 7b) are disposed in series on an optical path of a laser beam (2) emitted from a laser oscillator (1). Then, the devices (21a, 21b) are operated to supply a laser pulse to one of positioning-completed heads. A laser beam (2) with a generally constant energy quantity can be supplied to a machining unit by selecting a timing at which the devices (21a, 21b) are operated, whereby it is possible to machine a high-quality hole by effectively using a laser oscillator and accurately controlling a machining energy.