AUTOMATIC BEAM MODE-SELECTION DEVICE OF LASER BEAM MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a laser beam-resonance device of a laser beam machine capable of automatically selecting the beam mode by regulating the outside diameter of laser beams.

SOLUTION: The laser beam-oscillator device 100 oscillates laser beams LB in a casing 110 and feeds laser beams to a machining torch 10 via an output lens 130. An automatic beam mode-selection device 200 provided in the direction orthogonal to the axis of the laser beams LB has a stop member 220 to be guided by a linear guide. A piston rod 244 to be driven by a cylinder 240 provided on an outer side of a housing 210 drives a permanent magnet 250 having one polarity. A permanent magnet 230 having the other polarity mounted on the stop member 220 is driven in a non-contact manner to automatically select apertures 222, 224 of the stop member 220.

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