Method for electropolishing spark gap machined parts
Abstract
Abstract SURFACES OF METAL PARTS ARE MACHINED AND FINISHED BY A COMBINATION OF ELECTRIC DISCHARGE MACHINING (EDM) FOLLOWED BY ELECTROPOLISHING WITH FORMATION OF A GASEOUS FILM OVER THE SURFACE BEING FINISHED AND CARRYING OUT THE ELECTROPOLISHING AT A VOLTAGE IN EXCESS OF THE CRITICAL VOLTAGE OR NADIR DIP POINT VOLTAGE IN THE CURRENT DENSITY/ VOLTAGE CURVE. THE ACTIVE SURFACE OF THE CATHODE USED SHOULD BE SHAPED AND DEMENSIONED TO CONFORM TO THE FINAL FINISH DESIRED WHILE ALLOWING FOR ADEQUATE SPACING BETWEEN THE ACTIVE SURFACE AND PIECE PART SURFACE UNDERGOING POLISHING TO ACCOMMODATE THE ELECTROLYTE SOLUTION. THE ELECTROPOLISHING TREATMENT SERVES TO COMPLETELY OR ADEQUATELY REMOVE THE OBJECTIONABLE SURFACE LAYER WHICH IS CHARACTERISTIC OF ELECTRIC DISCHARGE MACHINING AND LEAVE THE FINISHED SURFACE SUBSTANTIALLY FREE OF PEAKS, CREVICES, AND RECAST MATERIAL AND ELIMINATES THE NEED FOR TEMPERING OR ANNEALING.
Inventors
- 👤 John F Jumer
Bibliographic Details
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