| 摘要 |
PURPOSE:To produce parts which have a hardened and polished surface accurately formed with grooves by irradiating the surface of the work partially with laser beams to alternately form hardened parts and non-hardened parts, then subjecting the surface of the work to polishing. CONSTITUTION:A laser oscillator 2 is operated to turn on and off the oscillation sate thereof. An X-Y table 4 is operated to move according to the oscillation condition of the oscillator 2. A laser light emitting part 3 is operated to oscillate at a high speed in such a manner that a plate 1 provided on the table 4 is irradiated with the laser light at about 1 to 2mm width. The surface of the plate 1 partially hardened to stripe shape in such a manner is subjected uniformly to surface grinding or polishing to fore the grooves 5 from about several micron depths to several tens micron on the non-hardened surface. The grooves 5 consisting of the side wall surfaces of the grooves 5 and the hardened surfaces which are connected with smooth arc shapes are accurately formed in this way. |
