METHOD FOR CUTTING GLASS BY LASER BEAM

摘要

PURPOSE:To obtain a desired cut surface in a short period by irradiating a laser beam to a glass member of a high-temp. below the softening point while rotating the glass member, exerting tensile force to a cutting part and cutting the member then irradiating further the laser to the member to reheat the same. CONSTITUTION:Cups 10 with moire are attracted and held to and by vacuum chucks 8. A main shaft 2 and an auxiliary shaft 6 are rotated in an X direction. The cutting part 13 is preheated by a preliminary burner 16. The cup 10 having the retained heat is stopped again in a preheating position C and after the cutting part 13 is again preheated by a burner 17, the cup stops in a laser beam position D. The laser beam 19 from a laser generator 18 is reflected by a bent mirror 20 and irradiates the cutting part 13 of the cup 10. The moire part is cut by the own weight thereof or when pulled forcibly downward.