JPS6415312A - Laser beam surface treating apparatus - Google Patents

Abstract

PURPOSE:To always almost fix radiated width on a work, to uniformly heat radiated surface and to execute quenching at uniform quality by constituting laser beam surface treating apparatus so as to irradiate to the prescribed position in the work after making parallel ray of the laser beam. CONSTITUTION:After facing hole H in the work W laid on a work table 3 with a mirror supporting member 45, by descending a lifting bracket 53, the lower part of the member 45 is inserted in the hole H. Next, the laser beam LB is generated 5 and after deforming the cross sectional shape of the beam LB into the parallel ray having square shape, it is made incident on a bent mirror 43 and further reflected with the mirror 43, to irradiate inner peripheral face in the hole H. Then, the member 45 is rotated by driving a motor 75 and the beam LB is made to one round of the inner peripheral face in the hole H, to execute the quenching to the inner peripheral face in the hole H. Further, the member 45 is faced to the outer peripheral surface of the work W and by irradiating the beam LB on the outer peripheral face while rotating the work W, the outer peripheral face of the work W can be quenched by the laser beam.