FR2433996A1 - Jig ground twist drill - has plane cutting edges with lateral edges in centre and point symmetrical open areas on tip (NL 26.2.80) - Google Patents

Jig ground twist drill - has plane cutting edges with lateral edges in centre and point symmetrical open areas on tip (NL 26.2.80)

Info

Publication number
FR2433996A1
FR2433996A1 FR7921138A FR7921138A FR2433996A1 FR 2433996 A1 FR2433996 A1 FR 2433996A1 FR 7921138 A FR7921138 A FR 7921138A FR 7921138 A FR7921138 A FR 7921138A FR 2433996 A1 FR2433996 A1 FR 2433996A1
Authority
FR
France
Prior art keywords
cutting edges
open areas
tip
centre
edges
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.)
Granted
Application number
FR7921138A
Other languages
French (fr)
Other versions
FR2433996B1 (en
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.)
KAWARAGI Manufacturing CO
Original Assignee
KAWARAGI Manufacturing CO
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 KAWARAGI Manufacturing CO filed Critical KAWARAGI Manufacturing CO
Publication of FR2433996A1 publication Critical patent/FR2433996A1/en
Application granted granted Critical
Publication of FR2433996B1 publication Critical patent/FR2433996B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
    • B24B3/26—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of the point of twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/04—Angles, e.g. cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/18—Configuration of the drill point

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

The cutting surfaces of the drill (10) are symmetrical to the axis of the shaft. The drill has plane cutting edges (12, 14) and open areas (16, 18) which are a continuation of the cutting edges. The drill is provided with spiral-shaped chip-removing grooves (20, 22) between the open areas and the cutting edges. Inside the cutting edges lateral cutting surfaces (26, 28) are provided, resulting in a point tip (30). The relief angle of the cutting edges is 35 deg. +- 3 deg..
FR7921138A 1978-08-22 1979-08-22 Jig ground twist drill - has plane cutting edges with lateral edges in centre and point symmetrical open areas on tip (NL 26.2.80) Granted FR2433996A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10139078A JPS5531523A (en) 1978-08-22 1978-08-22 Twist drill

Publications (2)

Publication Number Publication Date
FR2433996A1 true FR2433996A1 (en) 1980-03-21
FR2433996B1 FR2433996B1 (en) 1983-02-18

Family

ID=14299419

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7921138A Granted FR2433996A1 (en) 1978-08-22 1979-08-22 Jig ground twist drill - has plane cutting edges with lateral edges in centre and point symmetrical open areas on tip (NL 26.2.80)

Country Status (2)

Country Link
JP (1) JPS5531523A (en)
FR (1) FR2433996A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005092547A1 (en) * 2004-03-17 2005-10-06 Kennametal Inc. Twist drill

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5519723B2 (en) * 2012-04-11 2014-06-11 住友電工ハードメタル株式会社 Replaceable tip drill

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB168634A (en) * 1920-05-08 1921-09-08 Herbert Hunt Improvements in twist drill point grinding machines
GB306887A (en) * 1928-02-27 1929-07-11 Paul Touzot Improvements in or relating to apparatus for sharpening twist drills
CH135810A (en) * 1929-05-31 1929-10-15 Huguenin Henri Method for sharpening small drills and tools for implementing said method.
FR669821A (en) * 1929-11-30
FR959100A (en) * 1946-02-08 1950-03-23
FR1138018A (en) * 1955-12-06 1957-06-06 Method and apparatus for sharpening drills
US2932135A (en) * 1956-12-18 1960-04-12 Tatar Alexander Machine for sharpening four-face drills
US2932924A (en) * 1956-10-11 1960-04-19 Zachow Frank Henry Drill sharpening apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR669821A (en) * 1929-11-30
GB168634A (en) * 1920-05-08 1921-09-08 Herbert Hunt Improvements in twist drill point grinding machines
GB306887A (en) * 1928-02-27 1929-07-11 Paul Touzot Improvements in or relating to apparatus for sharpening twist drills
CH135810A (en) * 1929-05-31 1929-10-15 Huguenin Henri Method for sharpening small drills and tools for implementing said method.
FR959100A (en) * 1946-02-08 1950-03-23
FR1138018A (en) * 1955-12-06 1957-06-06 Method and apparatus for sharpening drills
US2932924A (en) * 1956-10-11 1960-04-19 Zachow Frank Henry Drill sharpening apparatus
US2932135A (en) * 1956-12-18 1960-04-12 Tatar Alexander Machine for sharpening four-face drills

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005092547A1 (en) * 2004-03-17 2005-10-06 Kennametal Inc. Twist drill
CN100417479C (en) * 2004-03-17 2008-09-10 钴碳化钨硬质合金公司 Twist drill
US7837418B2 (en) 2004-03-17 2010-11-23 Kennametal Inc. Twist drill

Also Published As

Publication number Publication date
JPS5531523A (en) 1980-03-05
FR2433996B1 (en) 1983-02-18

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Legal Events

Date Code Title Description
ST Notification of lapse