METHOD AND DEVICE FOR LASER-INDUCED WORKING

• Main Authors: FUJISAWA MASAYASU, YAMASAKA MINORU
• Format: Patent
• Language: English
• Published: 26.12.1988
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

PURPOSE:To finely work an electrically conductive difficult-to-grind material with high efficiency and precision by arranging an electrode in the vicinity of a position where a work is irradiated by laser light, supplying a liq. etchant to the gap between the electrode and the work, and impressing a DC voltage between both electrode and work. CONSTITUTION:The conductive difficult-to-grind work 1 is placed in an etching vessel 2. The liq. etchant 6 is supplied to the etchant supply hole 3a of a working head 3, fed to the gap 11 through a tiny hole 5, and then returned to an etchant tank 16. The surface of the work 1 is irradiated by the laser light, a set DC voltage is impressed between the work 1 and the electrode 12, and grooving is started. The part of the work 1 locally heated by the laser light is efficiently etched as the temp. of the etchant 6 increases. As a result, the protrusion on the working surface provided with fine ruggednesses is preferentially dissolved, and a groove having a set width is successively formed on the surface of the work 1 with high precision.