METHOD AND DEVICE FOR DULL ROLL WORKING BY LASER

摘要

PURPOSE:To form a dull face in the porous shape and arrangement of optimum hardness by expanding the diameter of the laser beam having specific pulse strength by plural Q switch signals and forming in non-parallel group and focusing on the roll surface and delaying in order the Q switching time. CONSTITUTION:The laser beams LB1-LB4 in specific pulse strength are oscillated by laser oscillators OSC1-OSC4 with the plural Q switch signals Q1-4 transmitted from a Q switch control system 10. Specific divergence angles Q1-Q4 are respectively made by beam expanders BX1-BX4 and convergences FP1-FP2 are effected respectively on a roll surface 20 by a reflection mirror BM, prism MM and condensing lens FL to delay in order the Q switch time by one shot multivibrators OM1-OM4 as well. The roll surface 20 becomes at optimum hardness and in bore diameter depth and its porous arrangement is adequately dispersed to better the roll dull face.