SE7906970L - SPIRAL DRILL AND DEVICE FOR GRINDING THE SAME - Google Patents

SPIRAL DRILL AND DEVICE FOR GRINDING THE SAME

Info

Publication number
SE7906970L
SE7906970L SE7906970A SE7906970A SE7906970L SE 7906970 L SE7906970 L SE 7906970L SE 7906970 A SE7906970 A SE 7906970A SE 7906970 A SE7906970 A SE 7906970A SE 7906970 L SE7906970 L SE 7906970L
Authority
SE
Sweden
Prior art keywords
grinding
angle
twist drill
land
edge
Prior art date
Application number
SE7906970A
Other languages
Swedish (sv)
Inventor
H Kawaragi
M Kimura
Original Assignee
Kawaragi Mfg 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
Priority claimed from JP10139078A external-priority patent/JPS5531523A/en
Priority claimed from JP8804479A external-priority patent/JPS5615959A/en
Application filed by Kawaragi Mfg Co filed Critical Kawaragi Mfg Co
Publication of SE7906970L publication Critical patent/SE7906970L/en

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)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

A twist drill (10) has cutting edges (12, 14) which together define an obtuse angle. The part of the tip of the twist drill defining each cutting edge has a first portion adjoining the cutting edge which is chamfered and a land (16, 18) adjacent the chamfered portion. Each land (16, 18) defines a planar surface and the two planar surfaces lie in planes which meet to define an acute angle. Grinding apparatus for manufacturing such a twist drill includes a rotary coupling which slidably engages a twist drill holder on a pivotable head (36) in a slide (34). For grinding the cutting edges, the head and holder angle is set by a gauge (72) for the edge angle. The drill is rotated 180 DEG for grinding each edge. To change the angle automatically for land grinding, a lever engages the rotary coupling to move the head on the slide. <IMAGE>
SE7906970A 1978-08-22 1979-08-21 SPIRAL DRILL AND DEVICE FOR GRINDING THE SAME SE7906970L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10139078A JPS5531523A (en) 1978-08-22 1978-08-22 Twist drill
JP8804479A JPS5615959A (en) 1979-07-13 1979-07-13 Twist drill grinder

Publications (1)

Publication Number Publication Date
SE7906970L true SE7906970L (en) 1980-02-23

Family

ID=26429483

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7906970A SE7906970L (en) 1978-08-22 1979-08-21 SPIRAL DRILL AND DEVICE FOR GRINDING THE SAME

Country Status (5)

Country Link
CA (1) CA1124108A (en)
DE (1) DE2933632A1 (en)
GB (1) GB2028190B (en)
NL (1) NL7906147A (en)
SE (1) SE7906970L (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507115A1 (en) * 1981-06-04 1982-12-10 Atelier Rectification Affutage DRILLING TOOL COMPRISING AT LEAST THREE GOUJURES
DE3219341C2 (en) * 1982-05-22 1985-04-25 Günther & Co GmbH & Co, 6000 Frankfurt Twist drill
DE4406059A1 (en) * 1994-02-24 1995-10-12 Anton Wimmer Gmbh Werkzeug Und Tightening device for drill bits and milling cutters
DE19955172A1 (en) * 1999-11-16 2001-05-23 Kennametal Inc Method of grinding a drill bit and drill bit
CN104841983A (en) * 2015-05-29 2015-08-19 东莞豪顺家具有限公司 Machining tool of rivet with bottom hole and for back plate
US11407039B2 (en) 2018-01-29 2022-08-09 Milwaukee Electric Tool Corporation Drill bit
CN209157232U (en) 2018-10-09 2019-07-26 米沃奇电动工具公司 Drill bit

Also Published As

Publication number Publication date
NL7906147A (en) 1980-02-26
GB2028190B (en) 1982-06-16
CA1124108A (en) 1982-05-25
GB2028190A (en) 1980-03-05
DE2933632A1 (en) 1980-02-28

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