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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.:

US 9555506 B1

PDFFull Text
Date of Patent:
Jan. 31, 2017

Filed:

Feb. 28, 2013

Drill blank, method for manufacturing drill blank, drill, and method for manufacturing drill

Applicant:

Kyocera Corporation, Kyoto-shi, Kyoto, JP;

Inventors:

Shigeru Matsushita, Nagano, JP;

Tadayuki Yamada, Shiojiri, JP;

Assignee:

KYOCERA CORPORATION, Kyoto-Shi, Kyoto, JP;

Attorney:
Primary Examiner:

Archene Turner

Int. Cl.
CPC ...
B23P 15/32 (2006.01); B23K 1/00 (2006.01); B23K 1/005 (2006.01); B23K 31/02 (2006.01); B23B 51/02 (2006.01); B28B 3/02 (2006.01); C04B 35/56 (2006.01); C04B 35/64 (2006.01); B30B 15/02 (2006.01); B22F 3/02 (2006.01); C22C 29/08 (2006.01); B22F 7/06 (2006.01); B22F 5/00 (2006.01);
U.S. Cl.
CPC ...
B23P 15/32 (2013.01); B22F 3/02 (2013.01); B23B 51/02 (2013.01); B23K 1/0008 (2013.01); B23K 1/0056 (2013.01); B23K 31/025 (2013.01); B28B 3/02 (2013.01); B30B 15/022 (2013.01); C04B 35/5626 (2013.01); C04B 35/64 (2013.01); B22F 7/062 (2013.01); B22F 2005/001 (2013.01); B22F 2005/004 (2013.01); B23B 2222/28 (2013.01); B23K 2201/20 (2013.01); C22C 29/08 (2013.01); Y10T 408/89 (2015.01);
Abstract

Provided are a drill blank, a method for manufacturing a blank, a drill, and a method for manufacturing a drill which allow a step of brazing to be easy and allow the brazing to be precise. A drill includes a drill blank brazed thereto in an elongated columnar-shape and made of cemented carbide. In the drill blank, both dand dare equal to or smaller than 2 mm, d≧d>d, a ratio of the length to dis equal to or larger than 3, and d/d=0.96 to 1 and d/d=0.9 to 0.995 in a longitudinal direction, where dindicates the diameter of one end of both ends, dindicates the diameter of the other end thereof, and dindicates the minimum diameter of a central portion. Brazing of the drill blank is easy and precision in brazing is enhanced.

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