The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 2019
Filed:
Apr. 01, 2015
Toyo Tanso Co., Ltd., Osaka-shi, Osaka, JP;
Masao Kanda, Kanonji, JP;
Naoto Ohta, Osaka, JP;
Kiyoshi Saito, Kanonji, JP;
Masaki Okada, Kanonji, JP;
Motoki Onishi, Osaka, JP;
Takeyuki Namiki, Osaka, JP;
TOYO TANSO CO., LTD., Osaka-shi, JP;
Abstract
An object is to provide a graphite-copper composite electrode material that is capable of reducing electrode wear to a practically usable level and to provide an electrical discharge machining electrode using the material. A graphite-copper composite electrode material includes a substrate comprising a graphite material and having pores, and copper impregnated in the pores of the substrate, the electrode material having an electrical resistivity of 2.5 μΩm or less, preferably 1.5 μΩm or less, more preferably 1.0 μΩm or less. It is desirable that the substrate comprising the graphite material have an anisotropy ratio of 1.2 or less. It is desirable that an impregnation rate φ of the copper in the electrode material is 13% or greater. It is desirable that the substrate comprising the graphite material have a bulk density of from 1.40 Mg/mto 1.85 Mg/m.