| 摘要 |
PURPOSE:To facilitate disposal of chip by a method wherein a rod-like workpiece are heated in advance along several lines extending axially along an outer circumference thereof, by applying laser beams to form a thermally affected area therein and this area is cut to produce separated chips. CONSTITUTION:Some laser beams 7 are converged in a surface by a laser gun 5 so as to apply a fine thermally affected area 6 corresponding to a finishing margin to a surface of the workpiece 1 and a plurality of thermally affected area 6 are formed. Then, the workpiece 1 is held by a head stock 11 of the lathe and finished by a cutting tool 12 in the lathe. The cut chips are divided into further fine chips by said thermally affected areas 6 to facilitate the disposal of the chips. |
