Proposal of「peeling tool」: fabrication by electroplating and rapid formation by discharge or laser machining

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We propose a simple and fast fabricating method of tool electrode for micro-EDM. A' peeling tool', a wire coated with a different material, has been developed as an interim product for a microelectrode. A zinc layer was coated by electroplating on a tungsten electrode of 100μm diameter. The zinc layer makes both handling and chucking of the electrode easy. Part of the zinc layer is instantly' peeled' by a single discharge, exposing tungsten electrode under the zinc layer undamaged and the exposed electrode can be used in microhole drilling by EDM.