SE7906970L - SPIRAL DRILL AND DEVICE FOR GRINDING THE SAME - Google Patents
SPIRAL DRILL AND DEVICE FOR GRINDING THE SAMEInfo
- 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
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>
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)
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 |
-
1979
- 1979-08-13 NL NL7906147A patent/NL7906147A/en not_active Application Discontinuation
- 1979-08-20 CA CA334,731A patent/CA1124108A/en not_active Expired
- 1979-08-20 DE DE19792933632 patent/DE2933632A1/en not_active Ceased
- 1979-08-21 SE SE7906970A patent/SE7906970L/en not_active Application Discontinuation
- 1979-08-21 GB GB7929117A patent/GB2028190B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2933632A1 (en) | 1980-02-28 |
NL7906147A (en) | 1980-02-26 |
GB2028190B (en) | 1982-06-16 |
CA1124108A (en) | 1982-05-25 |
GB2028190A (en) | 1980-03-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |
Ref document number: 7906970-4 |