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:
Oct. 22, 1996
Filed:
Oct. 05, 1994
Keiichiro Tanabe, Hyogo, JP;
Akihiko Ikegaya, Hyogo, JP;
Toshiya Takahashi, Hyogo, JP;
Naoji Fujimori, Hyogo, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A diamond cutting tool has a rake face (5) of a cutting edge member (2) consisting essentially of a (111) plane of diamond. The cutting edge member (2) of diamond is vapor-deposited by CVD or the like on an independently prepared base material. In this vapor deposition, the diamond is deposited while controlling and periodically varying the carbon to hydrogen ratio of the supplied raw material gas, in such a manner that a (111) crystal plane is oriented with a prescribed fluctuation or non-uniformity, but is substantially parallel to the base material surface. The as-formed diamond material is separated from the base material and cut into a desired shape, and then bonded as a cutting edge member (2) to a tool base (1) through a metallization layer (4) and a brazing layer (3), in such an orientation that the (111) plane defines the rake face (5). The tool having such a rake face (5) consisting essentially of the (111) plane, with a prescribed fluctuation of its orientation, is excellent in wear resistance and is resistant to cleavage damage.