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Patent Searching and Data


Title:
TAP
Document Type and Number:
WIPO Patent Application WO/2018/235712
Kind Code:
A1
Abstract:
[Problem] To provide a tap which has improved extraction performance from a workpiece material after female thread processing even when the workpiece material is a low-ductile material represented by a titanium alloy or the like. [Solution] A tap 1 comprises a thread portion 2, a groove portion 3 splitting the thread portion 2, and a shank portion 4 formed contiguous with the thread portion 2 and the groove portion 3, wherein the groove portion 3 includes at least: a first groove 31 formed on a cutting-edge 5 side of the thread portion 2; a second groove 32 formed contiguous with the first groove 31; and a ridge portion 33 which is the boundary between the first groove 31 and the second groove 32. The distance e between the center axis O of the tap 1 and the ridge portion 33 is set longer than both the distance d1 between the center axis O and a groove bottom 31b of the first groove 31 and the distance d2 between the center axis O and a groove bottom 32b of the second groove 32.

Inventors:
TAKAMI Shunsuke (Fujikoshi-Honmachi 1-chomeToyama-sh, Toyama 11, 〒9308511, JP)
KURITA Yuki (Fujikoshi-Honmachi 1-chomeToyama-sh, Toyama 11, 〒9308511, JP)
Application Number:
JP2018/022685
Publication Date:
December 27, 2018
Filing Date:
June 14, 2018
Export Citation:
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Assignee:
NACHI-FUJIKOSHI CORP. (9-2 Higashi-Shinbashi 1-chome, Minato-ku Tokyo, 21, 〒1050021, JP)
International Classes:
B23G5/06
Domestic Patent References:
WO2014013549A12014-01-23
Foreign References:
US2145819A1939-01-31
KR20060117615A2006-11-17
EP0122176A21984-10-17
CN2325149Y1999-06-23
JP2008073774A2008-04-03
JP2005279832A2005-10-13
Attorney, Agent or Firm:
OTANI Kaichi (14-45, Suehirocho Takaoka-sh, Toyama 23, 〒9330023, JP)
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