EP1263557B1 - Bohrer, insbesondere forstnerbohrer oder kunstbohrer - Google Patents

Bohrer, insbesondere forstnerbohrer oder kunstbohrer Download PDF

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Publication number
EP1263557B1
EP1263557B1 EP01911226A EP01911226A EP1263557B1 EP 1263557 B1 EP1263557 B1 EP 1263557B1 EP 01911226 A EP01911226 A EP 01911226A EP 01911226 A EP01911226 A EP 01911226A EP 1263557 B1 EP1263557 B1 EP 1263557B1
Authority
EP
European Patent Office
Prior art keywords
drill
bit
circumferential
spur
cutter
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.)
Expired - Lifetime
Application number
EP01911226A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1263557A1 (de
Inventor
Helmut Eberhard
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.)
Johann Eberhard GmbH
Original Assignee
Johann Eberhard GmbH
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 AT3572000A external-priority patent/AT409600B/de
Application filed by Johann Eberhard GmbH filed Critical Johann Eberhard GmbH
Publication of EP1263557A1 publication Critical patent/EP1263557A1/de
Application granted granted Critical
Publication of EP1263557B1 publication Critical patent/EP1263557B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G15/00—Boring or turning tools; Augers

Definitions

  • the invention relates to a drill, in particular Forstner drill or Artificial drill, with a drill shaft and a cutting head, which has a central mandrel has, from which a first and a second end cutting edge radially in each other extend in the opposite direction to the outside, with the circumferential The ends of the first and second end cutting edge each cover the circumference of the cutting head delimiting, hollow cylinder segment-like wall with a peripheral cutting edge that connects to their end distant from the forehead edge one to the other forehead edge opening chip space penetrating the drill head.
  • Drills of this type are mass-produced products that are suitable for use in handheld stands, stands, Dowel or row drilling machines are provided and produced in large numbers and to be expelled. It can be used to drill holes with a relatively large diameter various materials, from plastic-coated chipboard, glued Wood panels can be drilled down to acrylic glass panels and other base materials.
  • the disadvantage of previously known drills lies in the relatively high drilling forces or torques, which must be applied by the drilling machines, since the face cutting edges and the Circumferential cutting with its straight edges overcomes a high material resistance have to.
  • peripheral cutting edges of such known drills tend to be due to the high load during the drilling process to overheat, which is caused by a blue tarnish can be seen. This can cause permanent damage to the drill come.
  • circumferential cutting is required tooth-like training has been used. However, these cause an unclean one Guide the drill and the drill hole is torn out.
  • the object of the invention is to provide a drill of the type mentioned specify with the help of which the efficiency of a hole to be drilled applied energy can be increased or with the drilling using lower drilling forces can be carried out, the material load of the drill is kept relatively low.
  • the undulations and elevations are formed by serrated edges.
  • the invention further relates to a method for producing a drill, in particular a Forstner bit or an artificial bit according to the preamble of claim 3 (see for example EP 855 257 A).
  • the object of the invention is an automated processing of To enable circumferential cutting of a drill in a technically simple and precise manner.
  • the drill shaft is ground and then the surveys and in-depths, in particular with the formation of a Serrated, hard milled with a hard milling cutter. This way it can be a very accurate one Design of the peripheral cutting edges can be achieved.
  • Fig.1 and Fig.2 show a Forstner bit, which essentially consists of a drill shaft 2, which is used for clamping in a drill chuck, and a cutting head 4 composed.
  • the cutting head 4 has a protruding central dome 1, from from which a first and a second end cutting edge 100, 100 'radially in relation to one another extend in the opposite direction to the outside.
  • the central mandrel is tapered pyramid-like, whereby a precise placement of the Drill on a mark for a borehole is made possible.
  • the mandrel 1 penetrates so far into the material to be drilled that the drill bit slips during commissioning the drill is prevented.
  • first and second end cutting edges 100 100 'each closes a circumference of the cutting head 4, hollow cylinder segment-like wall 10 with a circumferential cutting edge 8, which at its by the The cutting edge removed one end, which opened to the other front cutting edge, the Bore head penetrating chip space 7 limited.
  • 100 100 'runs a surface 12 falling towards the adjacent wall 10.
  • the two circumferential cutting edges 8 have undulating depressions 13 along their course and have elevations 14. These can only be along parts of the Circumferential cutting 8 run.
  • the wave-shaped depressions 13 and elevations 14 are preferably are formed by serrated edges.
  • the invention can be applied to a Forstner bit, an artificial bit or a similar wood drill bits are used.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Drilling And Boring (AREA)
EP01911226A 2000-03-03 2001-02-27 Bohrer, insbesondere forstnerbohrer oder kunstbohrer Expired - Lifetime EP1263557B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
AT3572000 2000-03-03
AT3572000A AT409600B (de) 2000-03-03 2000-03-03 Bohrer
US25529100P 2000-12-13 2000-12-13
US255291P 2000-12-13
PCT/AT2001/000053 WO2001064407A1 (de) 2000-03-03 2001-02-27 Bohrer, insbesondere forstnerbohrer oder kunstbohrer

Publications (2)

Publication Number Publication Date
EP1263557A1 EP1263557A1 (de) 2002-12-11
EP1263557B1 true EP1263557B1 (de) 2004-05-06

Family

ID=25608302

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01911226A Expired - Lifetime EP1263557B1 (de) 2000-03-03 2001-02-27 Bohrer, insbesondere forstnerbohrer oder kunstbohrer

Country Status (9)

Country Link
EP (1) EP1263557B1 (ja)
JP (1) JP5110755B2 (ja)
AT (1) ATE265917T1 (ja)
AU (1) AU4031201A (ja)
CA (1) CA2401134C (ja)
DE (1) DE50102205D1 (ja)
ES (1) ES2221888T3 (ja)
PT (1) PT1263557E (ja)
WO (1) WO2001064407A1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7648316B2 (en) 2006-01-26 2010-01-19 Wolfcraft, Gmbh Forstner drill bit
JP7390756B1 (ja) 2022-11-17 2023-12-04 株式会社オーゾネ 木製バット加工装置及び木製バットの加工方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60154107A (ja) * 1984-01-24 1985-08-13 Canon Inc 測距装置
CH670985A5 (en) * 1986-12-10 1989-07-31 Alphons Rogger Shank cutter for timber - has bore with axially movable, lockable pin
JPH09141616A (ja) * 1995-11-24 1997-06-03 Kanefusa Kk 木工用ボーリング錐
KR100485987B1 (ko) * 1996-02-29 2005-08-03 코메트 그룹 홀딩 게엠베하 기계공구용드릴공구및상기드릴공구를제작하는방법
JPH10151604A (ja) * 1996-11-25 1998-06-09 Kanefusa Corp 木工用ボーリング錐
JP3816616B2 (ja) * 1997-01-23 2006-08-30 コスモ工機株式会社 管体用ホールソー
DE19702423B4 (de) * 1997-01-24 2009-11-12 FAMAG-Werkzeugfabrik Friedr. Aug. Mühlhoff GmbH & Co. Zylinderkopfbohrer
DE29911945U1 (de) * 1999-07-08 1999-10-21 Weber Gustav Schlagring Holzbohrer mit zylindrischem Schneidkopf

Also Published As

Publication number Publication date
CA2401134C (en) 2008-08-26
AU4031201A (en) 2001-09-12
WO2001064407A1 (de) 2001-09-07
PT1263557E (pt) 2004-09-30
JP5110755B2 (ja) 2012-12-26
EP1263557A1 (de) 2002-12-11
CA2401134A1 (en) 2001-09-07
ES2221888T3 (es) 2005-01-16
JP2004502565A (ja) 2004-01-29
DE50102205D1 (de) 2004-06-09
ATE265917T1 (de) 2004-05-15

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