Oki Electric Cable Co., Ltd.

Mitsubishi Electric Corporation

Yoichiro Kimoto

Takashi Suzuki

Takayuki Nakagawa

Nobuyuki Washio

Yoshikazu Ukai

Isao Izui

Yuki Hashimoto

Yuji Miura

Hengbo Su

Masakazu Yoshimoto

Koichi Hashizume

To provide an electrode wire for electrical discharge machining including &#x3b2;-brass and &#x3b3;-brass arranged on an outer peripheral surface of a core and a method of manufacturing the electrode wire, capable of enhancing wire connection performance and cutting down manufacturing cost while trying to increase a processing speed. The electrode wire for electrical discharge machining according to this invention comprises: an external layer including &#x3b2;-brass and &#x3b3;-brass; and a core having an undulating shape formed at a boundary surface with the external layer. The &#x3b2;-brass and the &#x3b3;-brass are arranged densely and sparsely at the boundary surface of the undulating shape. The method of manufacturing an electrode wire for electrical discharge machining according to this invention comprises: a thermal processing step of executing thermal process on a base material under a predetermined thermal processing condition, the base material having a core with a zinc-coated surface; and a wire drawing step of drawing a base wire under a predetermined wire drawing condition provided with &#x3b2;-brass and &#x3b3;-brass formed at the surface of the core by the thermal process to make the &#x3b3;-brass reach the core, thereby forming a boundary surface of the core with an external layer into an undulating shape.

Electrode wire for electrical discharge machining and method of manufacturing electrode wire for electrical discharge machining

A wire material having a copper-zinc alloy layer, which is formed by action of thermal diffusion, and a zinc layer on its circumference surface is subjected to processes, including from a step of drawing the wire material to a step of reducing the diameter of the product, to reliably crash the copper-zinc alloy layer into particles. The particles are embedded in the circumference surface of a core to integrate the diffusion alloy layer and zinc layer with the core and prevent the diffusion alloy layer and zinc layer from falling off from the core. In addition, in order to cover cracks formed in the copper-zinc alloy layer during wire drawing with a zinc thin film, wire drawing is performed at temperatures appropriate for maintaining good malleability and ductility of zinc.

Electrode wire for wire electrical discharge machining, method for manufacturing the same, and method for electrical discharge machining using the same

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Kanagawa-ken, Japan

Yoichiro Kimoto