Hitachi Cable, Inc.

Kiyoshi Shimojima

Takahiro Sato

Seigi Aoyama

Koichi Tamura

Hideo Kawano

Takamitsu Kimura

Masato Watabe

It is an object of the invention to provide an electrode wire for an electrical discharge machining apparatus, which is low-priced in cost of production, has sufficient conductivity and strength at high temperature and is suited for improving the speed of electrical discharge machining. Cu&mdash;Zn alloy covering layer is formed around a core metallic wire formed of Cu&mdash;0.02 to 0.2 Zr alloy or Cu&mdash;0.15 to 0.25 Sn&mdash;0.15 to 0.25 In alloy.

Electrode wire for electrical discharge machining apparatus

The invention relates to a method for manufacturing an electrode wire for an electrical discharge machining apparatus, which is composed of a core wire formed of Cu or Cu-alloy and a covering layer formed of brass. A brass tape is longitudinally applied around a core wire to provide a pipe, a seam formed by butting longitudinal edges of the brass tape is continuously welded to provide a composite wire, area-reduction process of reduction rate less than 65% is applied to the brass pipe by means of a squeezing die, a heat treatment at a temperature higher a recrystallization one of brass is applied to the composite pipe, and thereafter the composite wire is processed to be reduced in area through plural reducing dies step by step.

Method for manufacturing electrode wire for electrical discharge machining apparatus

Growing community of inventors

Ibaraki, Japan

Kiyoshi Shimojima