EP0378964B1 - Outil à trépaner - Google Patents

Outil à trépaner Download PDF

Info

Publication number
EP0378964B1
EP0378964B1 EP89810661A EP89810661A EP0378964B1 EP 0378964 B1 EP0378964 B1 EP 0378964B1 EP 89810661 A EP89810661 A EP 89810661A EP 89810661 A EP89810661 A EP 89810661A EP 0378964 B1 EP0378964 B1 EP 0378964B1
Authority
EP
European Patent Office
Prior art keywords
guide body
guide
cutting body
segments
cutting
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
EP89810661A
Other languages
German (de)
English (en)
Other versions
EP0378964A3 (en
EP0378964A2 (fr
Inventor
Josef Obermeier
Ernst Wohlwend
Eugen Dr. Magyari
Horst-Detlef Gassmann
Walter Ritt
Peter Cavada
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to AT89810661T priority Critical patent/ATE91933T1/de
Publication of EP0378964A2 publication Critical patent/EP0378964A2/fr
Publication of EP0378964A3 publication Critical patent/EP0378964A3/de
Application granted granted Critical
Publication of EP0378964B1 publication Critical patent/EP0378964B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D99/00—Subject matter not provided for in other groups of this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/041—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/78—Tool of specific diverse material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/81—Tool having crystalline cutting edge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/895—Having axial, core-receiving central portion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/896—Having product-receiving chamber

Definitions

  • the invention relates to a hollow drilling tool with a tubular carrier part, with a cutting body arranged at the front end thereof, and with a guide body that has a higher wear resistance than the carrier part, which corresponds at least along part of the circumference of the outer contour of the cutting body and in its axial extent is equal to or larger than that Cutting body is.
  • Hollow boring tools are mainly used for drilling larger diameter bores.
  • a hollow drilling tool is known for example from GB-PS 935 030.
  • the ring-shaped cutting body is connected to the carrier part.
  • the radial guidance of this hollow drilling tool takes place exclusively via the cutting body.
  • the guide length becomes shorter. If the guide length is too small, an exact borehole geometry can no longer be guaranteed.
  • a hollow drilling tool which has a kind of stabilizer after the cutting body, the stabilizer being clamped directly between the matrix of the cutting body and sleeves.
  • the stabilizer is supported directly on the matrix of the cutting body by means of threaded rings in the form of two nuts.
  • the offset design creates a very complex and complicated tool that also requires a coupling between the cutting body and the guide part that is not easy to manufacture. There is also a risk that the resulting pressure forces will loosen, deform or destroy the matrix.
  • the invention has for its object to provide a hollow drilling tool that allows both a full utilization of the cutting body and adherence to a precise drill hole geometry, and is simple, economical and rational to manufacture.
  • this is achieved in that the front end of the guide body is connected to the rear end of the cutting body and the rear end of the guide body is connected to the front end of the carrier part and the carrier part is connected to the guide body by welding or soldering and the guide elements to the cutting body is connected by sintering, soldering or welding
  • the two functions "cutting” and “guiding” are separated from one another by the arrangement of a guide body. Since the outer contour of the guide body at least along one Part of the circumference corresponds to the outer contour of the cutting body, the guide body is guided in the bore previously made by the cutting bodies. Since the guide body has a higher wear resistance than the carrier part, premature wear of the guide body is prevented.
  • the fact that the carrier part is connected to the guide body by soldering or welding and the guide body is connected to the cutting body by sintering, soldering or welding not only ensures simple and safe power support, but also economical and rational production.
  • Guide elements arranged on the guide body are expediently designed as segments. Segments each extend over part of the circumference. If the circumferential extent of the segments is sufficiently small and the outside diameter of the hollow drilling tool is sufficiently large, the segments can also be designed as flat strips that extend in the axial direction.
  • At least three guide elements which are distributed along the circumference and are designed as segments, are preferably provided.
  • the central position of the hollow drilling tool in a hole is determined using three segments. However, more than three, for example four or six, segments can also be provided for a favorable distribution of the lateral forces.
  • the guide elements which are designed as segments, are expediently arranged next to the cutting body in an extension against the feed direction.
  • the cutting body is thus supported in the axial direction on the segments and these in turn on the carrier part.
  • the segments and the cutting body can each be produced individually and then connected to one another, for example by soldering. Because the cutting body preferably consists of synthetic diamonds embedded in a metal matrix, the cutting body and the segments can also be pre-sintered individually and then sintered together to form a single body.
  • the segments are expediently part of a guide body arranged between the carrier part and the cutting body.
  • the guide body can thus be manufactured separately and then connected at one end to the carrier part and at the other end to the cutting body. This enables an additional rational and economical effect in the production.
  • the guide body can, for example, be provided with grooves running in the axial direction, so that strips serving to guide the hollow drilling tool are produced between the individual grooves. Such grooves also serve for the good removal of the cooling water and the cuttings washed away with it.
  • the guide body can also be pre-sintered and then connected to the cutting body.
  • the guide body advantageously contains wear-resistant hard materials.
  • hard materials are, for example, silicon carbide or the like. These hard materials can be sintered into a matrix material.
  • the hollow drilling tool shown in FIGS. 1 and 2 consists of a tubular carrier part 1, a ring-shaped cutting body 2 and a likewise ring-shaped guide body 3.
  • the carrier part 1 has a front end 1a and a rear end 1b. At the rear end 1b, the carrier part 1 is provided with a connecting piece 1c.
  • the cutting body 2 also has a front end 2a and a rear end 2b.
  • the cutting body 2 is also provided with two diametrically opposed slots 2c extending from the front end 2a. These slots 2c serve for the passage of the cooling water supplied through the carrier part 1 from the inside to the outside of the hollow drilling tool.
  • the guide body 3 has a front end 3a and a rear end 3b.
  • the front end 3a of the guide body 3 is connected to the rear end 2b of the cutting body 2.
  • the guide body 3 is provided along its circumference with grooves 3c running in the axial direction. These grooves 3c serve to discharge the cooling water and the cuttings washed away with it. The webs remaining between the grooves 3c are used for guidance and are designed as guide elements 3d.
  • the rear end 2b of the guide body 3 is connected to the front end 1a of the carrier part 1. This connection of the carrier part 1 to the guide body 3 can take place, for example, by welding or soldering.
  • the connection between the cutting body 2 and the guide body 3 can also be made by welding or soldering. It is also possible to sinter the cutting body 2 and the guide body together.
  • the axial extent 1 of the guide body 3 is a multiple of the axial extent s of the cutting body 2.
  • the hollow drilling tool shown in FIG. 3 consists of a carrier part 11 and a cutting body 12 arranged at its front end 11a and a guide body 13.
  • the guide body 13 is located between the carrier part 11 and the cutting bodies 12 and corresponds in cross section to the cutting body 12.
  • the cutting body 12 and the guide body 13 can be connected to one another by sintering, soldering or welding.
  • the guide body 13 is connected to the carrier part 11 by welding or soldering.
  • the carrier part 11 and the guide body 13 are connected to one another only at the end. Due to the gaps between the guide body 13, the cooling water can circulate from the inside to the outside of the tubular support part 11.
  • the axial extent t of the guide body 13 corresponds approximately to the axial extent s of the cutting body 12. This ensures that the guidance is sufficient until the cutting bodies 12 are completely worn out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)
  • Surgical Instruments (AREA)
  • Dowels (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Nonmetallic Welding Materials (AREA)

Claims (5)

  1. Outil de forage creux, comprenant un élément de support tubulaire (1, 11), un corps de coupe (2, 12) monté sur l'extrémité antérieure (1a, 11a) de celui-ci et un corps de guidage (3, 13) qui présente une résistance à l'usure accrue par rapport à l'élément de support (1, 11) et correspond, au moins le long d'une partie de la circonférence, au contour extérieur du corps de coupe (2, 12) et dont l'extension axiale (1, t) est égale ou supérieure à celle du corps de coupe (2, 12), caractérisé en ce que l'extrémité antérieure (3a) du corps de guidage (3, 13) est rattachée à l'extrémité postérieure (2b) du corps de coupe (2, 12), que l'extrémité postérieure (3b) du corps de guidage (3, 13) est rattachée à l'extrémité antérieure (1a) de l'élément de support (1, 12), et que l'élément de support (1, 12) est solidarisé avec le corps de guidage (3, 13) par soudure ou brasure, alors que le corps de guidage (3, 13) et le corps de coupe (2, 12) sont réunis par frittage, brasure ou soudure.
  2. Outil de forage creux selon la revendication 1, caractérisé en ce que des éléments de guidage (3d, 13) prévus sur le corps de guidage (3, 13) sont conformés en segments.
  3. Outil de forage creux selon la revendication 2, caractérisé en ce qu'il comprend au moins trois éléments de guidage (3d, 13) conformés en segments et répartis sur la circonférence.
  4. Outil de forage creux selon l'une des revendications 2 ou 3, caractérisé en ce que les éléments de guidage (3d, 13) conformés en segments sont disposés, dans le sens opposé à l'avancement, dans le prolongement du corps de coupe (2, 12).
  5. Outil de forage creux selon l'une des revendications 2 à 4, caractérisé en ce que les segments font partie d'un corps de guidage (3) disposé entre l'élément de support (1) et le corps de coupe (2).
EP89810661A 1989-01-20 1989-09-05 Outil à trépaner Expired - Lifetime EP0378964B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810661T ATE91933T1 (de) 1989-01-20 1989-09-05 Hohlbohrwerkzeug.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3901528 1989-01-20
DE3901528A DE3901528A1 (de) 1989-01-20 1989-01-20 Hohlbohrwerkzeug

Publications (3)

Publication Number Publication Date
EP0378964A2 EP0378964A2 (fr) 1990-07-25
EP0378964A3 EP0378964A3 (en) 1990-09-26
EP0378964B1 true EP0378964B1 (fr) 1993-07-28

Family

ID=6372415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810661A Expired - Lifetime EP0378964B1 (fr) 1989-01-20 1989-09-05 Outil à trépaner

Country Status (6)

Country Link
US (1) US5069584A (fr)
EP (1) EP0378964B1 (fr)
JP (1) JPH02224978A (fr)
AT (1) ATE91933T1 (fr)
CA (1) CA2008169C (fr)
DE (2) DE3901528A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005463B3 (de) * 2007-01-30 2008-05-29 Ting Fong Electric & Machinery Co. Ltd., Sanchung Verfahren zur Herstellung von Bohrfräsern sowie Bohrfräser
US9687916B2 (en) 2011-12-22 2017-06-27 Hilti Aktiengesellschaft Drill bit with an exchangeable cutting portion

Families Citing this family (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE92815T1 (de) * 1989-06-14 1993-08-15 Swarovski Tyrolit Schleif Hohlbohrer.
US5316416A (en) * 1992-09-29 1994-05-31 Ehwa Diamond Ind. Co., Ltd. Diamond cutting tool for hard articles
US5887655A (en) * 1993-09-10 1999-03-30 Weatherford/Lamb, Inc Wellbore milling and drilling
US5887668A (en) * 1993-09-10 1999-03-30 Weatherford/Lamb, Inc. Wellbore milling-- drilling
US5996571A (en) * 1996-02-01 1999-12-07 Diamond Products Joint Venture Diamond core drill bit
US5741097A (en) * 1996-06-20 1998-04-21 Murphy, Ii; John W. Heat exchanger fin remover
US5803194A (en) * 1996-11-19 1998-09-08 Kennametal Inc. Wear protector for a drilling tool
US5823276A (en) * 1996-12-24 1998-10-20 Beck, Iii; August H. Diamond-tipped core barrel and method of using same
JP3290103B2 (ja) * 1997-06-11 2002-06-10 株式会社アライドマテリアル コアビット
US5865571A (en) * 1997-06-17 1999-02-02 Norton Company Non-metallic body cutting tools
US6203416B1 (en) * 1998-09-10 2001-03-20 Atock Co., Ltd. Outer-diameter blade, inner-diameter blade, core drill and processing machines using same ones
DE19926247B4 (de) * 1999-06-09 2005-08-04 Krauss-Maffei Wegmann Gmbh & Co. Kg Diamantkronenbohrer
US6196908B1 (en) * 1999-07-16 2001-03-06 Storage Technology Corporation Drill for composite materials
US20020137433A1 (en) * 2001-03-26 2002-09-26 Lee Lawrence K. Abrasive drill bit
AT5265U1 (de) * 2001-07-27 2002-05-27 Schraml Glastechnik Gmbh Diamant-hohlbohrer
EP1304199A1 (fr) * 2001-10-18 2003-04-23 Marcrist International Limited Trépan avec protection contre l'usure
US8191545B2 (en) * 2002-02-22 2012-06-05 Kim & Ed Pte Ltd Electroformed thin-wall core drills impregnated with abrasives
US6935325B1 (en) * 2002-11-01 2005-08-30 Lawrence L. Getty Method and apparatus for cutting and polishing stone articles
US7028790B2 (en) * 2003-09-19 2006-04-18 Jack Moore Associates, Inc. Rotary drill bit
WO2005095733A1 (fr) * 2004-03-31 2005-10-13 Japan Science And Technology Agency Methode pour pre-attacher/fixer un boulon d'ancrage, et methode et dispositif pour percer le trou de reception du boulon d'ancrage
US7927189B2 (en) * 2004-08-16 2011-04-19 United Technologies Corporation Superabrasive tool
EP1841944B1 (fr) * 2005-01-18 2014-03-05 Groupe Fordia Inc Meche pour percer un trou
GB2427843B (en) * 2005-10-24 2008-05-07 C4 Carbides Ltd Drill bit
US7204244B1 (en) 2006-03-02 2007-04-17 Luminare Supply Corporation Diamond core drill bit
US8221423B2 (en) * 2006-03-28 2012-07-17 Warsaw Orthopedic, Inc. Osteochondral plug graft harvesting instrument and kit
US20080100125A1 (en) * 2006-11-01 2008-05-01 Les Staples Abrasive cutter
US9540883B2 (en) 2006-11-30 2017-01-10 Longyear Tm, Inc. Fiber-containing diamond-impregnated cutting tools and methods of forming and using same
US9267332B2 (en) 2006-11-30 2016-02-23 Longyear Tm, Inc. Impregnated drilling tools including elongated structures
US7695542B2 (en) * 2006-11-30 2010-04-13 Longyear Tm, Inc. Fiber-containing diamond-impregnated cutting tools
AU2011201711B1 (en) * 2006-12-14 2011-07-28 Boart Longyear Company Core drill bit with extended matrix height
US8459381B2 (en) * 2006-12-14 2013-06-11 Longyear Tm, Inc. Drill bits with axially-tapered waterways
US9506298B2 (en) 2013-11-20 2016-11-29 Longyear Tm, Inc. Drill bits having blind-hole flushing and systems for using same
US7628228B2 (en) * 2006-12-14 2009-12-08 Longyear Tm, Inc. Core drill bit with extended crown height
US9500036B2 (en) 2006-12-14 2016-11-22 Longyear Tm, Inc. Single-waterway drill bits and systems for using same
US9279292B2 (en) 2013-11-20 2016-03-08 Longyear Tm, Inc. Drill bits having flushing and systems for using same
US20080181735A1 (en) * 2007-01-25 2008-07-31 Ting Fong Electric & Machinery Co., Ltd. Method for manufacturing drill cutters and structure thereof
CN101234468B (zh) * 2007-01-30 2010-05-19 鼎峰电机工业股份有限公司 钻孔刀具的制造方法及其结构
WO2009030052A1 (fr) * 2007-09-05 2009-03-12 Groupe Fordia Inc. Trépan
US8590646B2 (en) * 2009-09-22 2013-11-26 Longyear Tm, Inc. Impregnated cutting elements with large abrasive cutting media and methods of making and using the same
US8657894B2 (en) 2011-04-15 2014-02-25 Longyear Tm, Inc. Use of resonant mixing to produce impregnated bits
US20130022421A1 (en) * 2011-07-21 2013-01-24 Robert Bosch Gmbh Abrasive coring bit
US9579732B2 (en) 2012-07-18 2017-02-28 Milwaukee Electric Tool Corporation Hole saw
CA2825729C (fr) 2012-11-21 2018-05-22 Diamond Products, Limited Meche en diamant et ses procedes de fabrication
EP2745965A1 (fr) * 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Trépan doté d'une section de coupe interchangeable
EP2745966A1 (fr) * 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Trépan doté d'une section de coupe interchangeable
CA2854691C (fr) 2013-07-03 2017-10-31 Karl H. Moller Procede de fabrication d'une couronne de forage pourvue d'un aleseur pour l'extraction de diamants
DE102014007958A1 (de) * 2014-06-04 2015-12-17 Vittorio Pittana Vorrichtung und Verfahren zur Senkung der notwenigen Antriebsleistung bei Kernbohrarbeiten
EP3037229A1 (fr) * 2014-12-22 2016-06-29 HILTI Aktiengesellschaft Bague de forage pour une couronne de carottage
CN107208459B (zh) 2015-01-12 2020-09-29 长年Tm公司 具有碳化物形成合金的基体的钻井工具及其制造和使用方法
CN111065480B (zh) * 2017-08-03 2021-11-12 维斯塔斯风力系统有限公司 用于制造风力涡轮机叶片的铣头及其形成方法
EP3501713A1 (fr) * 2017-12-21 2019-06-26 HILTI Aktiengesellschaft Section de coupe pour une couronne de forage
EP3820639A4 (fr) 2018-07-10 2022-06-15 Milwaukee Electric Tool Corporation Scie-cloche dotée de trous à parois latérales hexagonales
US20200040663A1 (en) * 2018-08-02 2020-02-06 Qual Diamond Hi-Tech Corporation Electroformed thin-wall diamond drill bit with continuous wavy-shape blade
CN110424901B (zh) * 2019-08-17 2021-05-18 温州瓯厦建设有限公司 一种开孔器
US20210101248A1 (en) * 2019-10-07 2021-04-08 Paul Luccia Method and apparatus for forming holes
USD958855S1 (en) 2019-12-09 2022-07-26 Milwaukee Electric Tool Corporation Hole saw
USD959521S1 (en) * 2020-11-16 2022-08-02 Adam Abrams Tool

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE694502C (de) * 1938-10-05 1940-08-02 Walter Hebart Aus einem Bohrrohr und aufgesetztem Bohrkopf bestehendes Bohrwerkzeug, insbesondere zur Herstellung langer Bohrungen
US2996061A (en) * 1959-01-26 1961-08-15 Super Cut Abrasive diamond core drill
US3120286A (en) * 1962-01-04 1964-02-04 Jersey Prod Res Co Stabilized drag bit
SE337974B (fr) * 1970-09-29 1971-08-23 Sandvikens Jernverks Ab
CA948181A (en) * 1971-02-12 1974-05-28 Lionel Lavallee Diamond drills
SU437621A1 (ru) * 1972-06-21 1974-07-30 Предприятие П/Я В-2438 Алмазное кольцевое сверло
SU745701A1 (ru) * 1977-10-07 1980-07-07 Предприятие П/Я В-2438 Алмазное кольцевое сверло
CA1053938A (fr) * 1977-11-18 1979-05-08 Robert E. Generoux Trepan de carottage
SU791890A1 (ru) * 1978-01-30 1980-12-30 Ордена Трудового Красного Знамени Институт Сверхтвердых Материалов Ан Украинской Сср Долото колонковое
US4208154A (en) * 1978-03-21 1980-06-17 Gundy William P Core drill
SU856821A1 (ru) * 1979-04-06 1981-08-25 Всесоюзный Научно-Исследовательский Институт Нерудных Строительных Материалов И Гидромеханизации (Вниинеруд) Алмазный инструмент дл кольцевого сверлени
GB2052325A (en) * 1979-07-03 1981-01-28 Stark T Multi-cutter drilling bit tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005463B3 (de) * 2007-01-30 2008-05-29 Ting Fong Electric & Machinery Co. Ltd., Sanchung Verfahren zur Herstellung von Bohrfräsern sowie Bohrfräser
US9687916B2 (en) 2011-12-22 2017-06-27 Hilti Aktiengesellschaft Drill bit with an exchangeable cutting portion

Also Published As

Publication number Publication date
DE58905054D1 (de) 1993-09-02
EP0378964A3 (en) 1990-09-26
ATE91933T1 (de) 1993-08-15
CA2008169C (fr) 2000-01-04
US5069584A (en) 1991-12-03
DE3901528A1 (de) 1990-07-26
EP0378964A2 (fr) 1990-07-25
JPH02224978A (ja) 1990-09-06
CA2008169A1 (fr) 1990-07-20

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