JPS6411703A - Twist drill - Google Patents
Twist drillInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
1987
- 1987-07-02 JP JP16602487A patent/JPS6411703A/en active Pending
Cited By (11)
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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