JPS6411703A - Twist drill - Google Patents

Twist drill

Info

Publication number
JPS6411703A
JPS6411703A JP16602487A JP16602487A JPS6411703A JP S6411703 A JPS6411703 A JP S6411703A JP 16602487 A JP16602487 A JP 16602487A JP 16602487 A JP16602487 A JP 16602487A JP S6411703 A JPS6411703 A JP S6411703A
Authority
JP
Japan
Prior art keywords
groove
lead length
twisted
recess groove
recess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16602487A
Other languages
Japanese (ja)
Inventor
Hideji Hosono
Shinichi Nakamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Metal Corp
Original Assignee
Mitsubishi Metal Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Metal Corp filed Critical Mitsubishi Metal Corp
Priority to JP16602487A priority Critical patent/JPS6411703A/en
Publication of JPS6411703A publication Critical patent/JPS6411703A/en
Pending legal-status Critical Current

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  • Drilling Tools (AREA)

Abstract

PURPOSE:To eliminate the necessity of laborious repetition of a thinning process during repolishing, and to reduce cutting resistance, by shortening a predeter mined range of a recess groove formed along a twisted groove than the lead length of the twisted groove. CONSTITUTION:A twisted groove 2 is formed in the outer peripheral surface of a tool body 1, having a predetermined lead length L1 while a cutting edge 2a is formed in the front end ridge line section of the tool body, and a recess groove 3 which is concave toward the axis of the tool body 1 is formed in the circumferentially center part of the twisted groove 2. The lead length L2 of the recess groove 3 is set to be shorter than the lead length L1 of the twisted groove 2, and the rake angle of a thinning blade 3a is set in a direction which is more than that the lead length L2 of the recess groove 3 would be equal to the lead length L1 of the twist groove 2. In this arrangement, the recess groove 3 is shifted in the direction opposite to the rotating direction by repolishing so that the length of the cutting edge 2a becomes shorter. The lead length of this recess groove 3 is set to a value which is three times large as the diameter of the drill, and is made to be equal to the lead length of the twisted groove 2 on the base end side.
JP16602487A 1987-07-02 1987-07-02 Twist drill Pending JPS6411703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16602487A JPS6411703A (en) 1987-07-02 1987-07-02 Twist drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16602487A JPS6411703A (en) 1987-07-02 1987-07-02 Twist drill

Publications (1)

Publication Number Publication Date
JPS6411703A true JPS6411703A (en) 1989-01-17

Family

ID=15823518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16602487A Pending JPS6411703A (en) 1987-07-02 1987-07-02 Twist drill

Country Status (1)

Country Link
JP (1) JPS6411703A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891056A (en) * 1981-11-25 1983-05-30 住友電気工業株式会社 Diamond sintered body for tools and manufacture
US7114893B2 (en) * 2001-03-27 2006-10-03 Allied Machine & Engineering Corp. Drill insert geometry having V-notched web
JP2010221345A (en) * 2009-03-24 2010-10-07 Mitsubishi Materials Corp Drill
US8308402B2 (en) * 2007-05-29 2012-11-13 Sandvik Intellectual Property Ab Drill body for chip removing machining
US20140023449A1 (en) * 2011-04-05 2014-01-23 Kenth-Ove Jonsson Cutting head comprising a drill tip and a drill having such a cutting head
US9403246B2 (en) 2010-02-04 2016-08-02 Kennametal Inc. Drill bit and method for manufacturing
US20160256937A1 (en) * 2015-03-06 2016-09-08 Kennametal Inc. Rotary tool and method for producing a rotary tool
US20170274460A1 (en) * 2014-09-19 2017-09-28 Sumitomo Electric Hardmetal Corp. Drill
US9901990B2 (en) * 2010-02-04 2018-02-27 Kennametal Inc. Drilling tool

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891056A (en) * 1981-11-25 1983-05-30 住友電気工業株式会社 Diamond sintered body for tools and manufacture
US7114893B2 (en) * 2001-03-27 2006-10-03 Allied Machine & Engineering Corp. Drill insert geometry having V-notched web
US8308402B2 (en) * 2007-05-29 2012-11-13 Sandvik Intellectual Property Ab Drill body for chip removing machining
JP2010221345A (en) * 2009-03-24 2010-10-07 Mitsubishi Materials Corp Drill
US9403246B2 (en) 2010-02-04 2016-08-02 Kennametal Inc. Drill bit and method for manufacturing
US9901990B2 (en) * 2010-02-04 2018-02-27 Kennametal Inc. Drilling tool
US10661356B2 (en) 2010-02-04 2020-05-26 Kennametal Inc. Drilling tool
US20140023449A1 (en) * 2011-04-05 2014-01-23 Kenth-Ove Jonsson Cutting head comprising a drill tip and a drill having such a cutting head
US20170274460A1 (en) * 2014-09-19 2017-09-28 Sumitomo Electric Hardmetal Corp. Drill
US10155269B2 (en) * 2014-09-19 2018-12-18 Sumitomo Electric Hardmetal Corp. Drill
US20160256937A1 (en) * 2015-03-06 2016-09-08 Kennametal Inc. Rotary tool and method for producing a rotary tool

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