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EP0156762A1 - Foret à couronne - Google Patents

Foret à couronne Download PDF

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Publication number
EP0156762A1
EP0156762A1 EP85810026A EP85810026A EP0156762A1 EP 0156762 A1 EP0156762 A1 EP 0156762A1 EP 85810026 A EP85810026 A EP 85810026A EP 85810026 A EP85810026 A EP 85810026A EP 0156762 A1 EP0156762 A1 EP 0156762A1
Authority
EP
European Patent Office
Prior art keywords
drilling
hollow drill
support segments
segments
end region
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
EP85810026A
Other languages
German (de)
English (en)
Other versions
EP0156762B1 (fr
Inventor
Karl-Heinz Ing. Gärtner
Franz Hoyss
Heinrich Pauli
Dieter Dipl.-Ing. Scholz
Horst-Detlef Ing. Gassmann
Ernst Wohlwend
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6229642&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0156762(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hilti AG filed Critical Hilti AG
Priority to AT85810026T priority Critical patent/ATE34329T1/de
Publication of EP0156762A1 publication Critical patent/EP0156762A1/fr
Application granted granted Critical
Publication of EP0156762B1 publication Critical patent/EP0156762B1/fr
Expired legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a hollow drill with a metallic, hollow cylindrical carrier body which has an open end on the drilling direction side with supporting segments for cutting teeth made of diamond grain arranged at a distance from one another in the circumferential direction.
  • Hollow drills are known for producing bores in rock, concrete and the like materials, which have a cylindrical support body with supporting segments for cutting teeth made of diamond grain.
  • the support segments of these known hollow drills consist of a matrix in which the diamond grains are embedded.
  • the free end face of these support segments is each designed as a plane plane running normal to the longitudinal axis of the hollow drill.
  • the supporting segments are produced by sintering, which means that there are no free-standing diamond grains on the surface.
  • the support segments produced in this way are therefore due to the lack of free-standing diamond grains neither suitable for the tapping process nor for the actual drilling process.
  • the invention has for its object to provide a hollow drill of the type mentioned, the support segments are economically producible and also ensure a perfect drilling process, which is particularly feasible without separate aids, such as additional holding by the operator.
  • the object is achieved in that the end region of the support segments on the drilling direction tapers at least over part of their length in the drilling direction and the free end face forms a line running in the circumferential direction along at least part of the tapered end region of the support segments.
  • the support segments with a tapered end area according to the invention are also preferably produced by sintering, this production also having the result that no diamond grains acting as cutting teeth are exposed on the surface.
  • the tapered end area of new support segments manufactured in this way comes into contact with the drilling material during the first tapping process, a part of the matrix is removed very quickly due to the extraordinarily high specific stress in the area of the free linear end face, so that a small number of diamond grains are removed in that area be exposed. Since these exposed diamond grains lie essentially on a line extending in the circumferential direction, they create a guideway immediately after hitting the drilling material. This guideway prevents the hollow drill bit from moving to the side and increases continuously as the drilling process continues.
  • the entire surface of the supporting segments gradually comes into contact with the drill material, so that diamond grains are continuously exposed in those areas by removing the matrix.
  • the large number of exposed diamond grains can no longer lead to lateral evasion of the hollow drill thanks to the already existing sufficient guidance.
  • the tapered region of the support segments has fulfilled its task if a sufficient guideway for the hollow drill, which prevents lateral deflection, is created.
  • the design of the support segments is therefore advantageously carried out in such a way that the tapered area is degraded when the remaining surface of the support segments has reached a condition suitable for the further drilling process. With such drilled support segments you can then without partial appearances, both tapping and actual drilling operations are carried out.
  • the tapering end region of the support segments advantageously has one or more radially inclined side surfaces.
  • the side surfaces inclined in this way can extend over the entire length or only over part of the length of the support segments. It is also possible to combine these radially inclined side surfaces with one or more boundary surfaces inclined in the circumferential direction.
  • Such side surfaces inclined in the circumferential direction which lead to a shortening of the line running in the circumferential direction, can be arranged upstream, downstream or also arranged on both sides in the direction of rotation of the hollow drill.
  • the speed of removal of the tapered end area can be influenced both by the dimensioning in terms of size and by the formal design.
  • the tapered end region of the support segments preferably has radially rectilinear side surfaces.
  • the tapering end region is preferably formed by an inclined side surface.
  • the side surface which is expediently inclined at an angle of 50 ° -80 °, preferably 70 °, to the drill axis can either extend towards the peripheral edge of the support segment in the drilling direction or decrease in the drilling direction.
  • the end region of the support segments on the drilling direction side is formed by two inclined side surfaces.
  • This embodiment ensures a favorable load due to the symmetrical design, since the krj te attack centrally. This occurs especially with side surfaces that are preferably inclined at the same angle.
  • Such tra segments lead to advantages in terms of strength and additionally result in a favorable load on, for example made by a soldering process connection to the hollow cylindrical support body of the hollow drill.
  • the angle enclosed between the two side surfaces can be between 60 ° and 120 ° and preferably 90 °. This inclination of the side surfaces on the one hand fulfills the strength requirements for the support segments and on the other hand ensures that a sufficient number of diamond grains is uncovered quickly enough for drilling during the first contact between the support segments and the drilling material.
  • the improvement in the drilling behavior is achieved by the end face of the hollow drill, which is at least partially designed as a line.
  • the invention relates in particular to the further development of these supporting segments.
  • a taper of such supports can also be formed by one or more radially inclined side surfaces, wherein such side surfaces preferably also run in a straight line and can have the aforementioned angular mass.
  • FIG. 1 shows a hollow drill designated 1 overall. This consists of a hollow cylindrical carrier body 2 with a drive shaft 3 protruding counter to the drilling direction. Cutting teeth 6 formed by diamond grain are embedded in these.
  • the end region of the support segments 5 on the drilling direction side is tapered in the drilling direction, with two side surfaces 7 running at an angle symmetry relative to one another forming an angle ⁇ of 90 °.
  • the intersection of the side surfaces 7 forms a line 8 running in the circumferential direction, along which incisors 6 are exposed during the drilling process.
  • the support segments 5 are form-fitting on the support body 2 and fixed, for example, by soldering.
  • the cutting teeth 6 or 14 lying on the line 8 or 13 first create a guide groove which prevents the hollow drill 1 from evading radially from the start.
  • Two radially inclined side surfaces 22 form a circumferential line 23 along their intersection.
  • the tapered end region of the support segments 21 also has a circumferentially inclined boundary surface 24 on, which can be upstream or downstream of the direction of rotation of the hollow drill.
  • Cutting teeth 25 in the form of diamond grain are also embedded in the supporting segment 21.
  • FIG. 6 shows a support segment, designated overall by 31, which is arranged on a support body 2 and has two radially inclined side surfaces 32.
  • the radius r of the line 33 formed by the intersection of the side surfaces falls below the average radius R of the carrier body 2, the support segment 31 being arranged in such a way that the maximum dimension of the radius difference is at the segment ends.
  • boundary surfaces 34 are provided in order to avoid the radius difference which has a disadvantageous effect on the creation of a guide groove. These boundary surfaces 34 lead to a shortening of the line 33. The radius difference has thus been reduced in such a way that it can no longer have a disadvantageous effect when the guide groove is created.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Disintegrating Or Milling (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Drilling Tools (AREA)
EP85810026A 1984-03-05 1985-01-25 Foret à couronne Expired EP0156762B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810026T ATE34329T1 (de) 1984-03-05 1985-01-25 Hohlbohrer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843408092 DE3408092A1 (de) 1984-03-05 1984-03-05 Hohlbohrer
DE3408092 1984-03-05

Publications (2)

Publication Number Publication Date
EP0156762A1 true EP0156762A1 (fr) 1985-10-02
EP0156762B1 EP0156762B1 (fr) 1988-05-18

Family

ID=6229642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810026A Expired EP0156762B1 (fr) 1984-03-05 1985-01-25 Foret à couronne

Country Status (3)

Country Link
EP (1) EP0156762B1 (fr)
AT (1) ATE34329T1 (fr)
DE (2) DE3408092A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0221548A2 (fr) * 1985-11-05 1987-05-13 Disco Abrasive Systems, Ltd. Outil de découpage pourvu de couches abrasives intérieures et extérieures disposées concentriquement et son procédé de fabrication
DE8715431U1 (de) * 1986-12-10 1988-04-07 Fa. Herbert Happe, 5600 Wuppertal Bohrvorrichtung zum Ausschneiden von Ringschlitzen
EP0583629A1 (fr) * 1992-08-10 1994-02-23 Bauer Spezialtiefbau GmbH Couronne de forage avec des éléments dentés répartis sur la périphérie et disposés de façon amovible
EP0857552A2 (fr) * 1997-01-27 1998-08-12 Tyrolit Schleifmittelwerke Swarovski KG Elément pour couper de la pierre ayant une résistance accrue à l'usure
EP0985505A2 (fr) * 1998-09-10 2000-03-15 Atock Co., Ltd. Lame de scie circulaire, lame de scie annulaire à tranchant interne et machine utilisant ces outils
GB2423538A (en) * 2005-02-24 2006-08-30 Marcrist Internat Ltd Core drilling segments with side protection
GB2423540A (en) * 2005-02-24 2006-08-30 Marcrist Internat Ltd Core drills and cutting discs
GB2423536A (en) * 2005-02-24 2006-08-30 Marcrist Internat Ltd Diamond core drill
RU168413U1 (ru) * 2016-05-18 2017-02-02 Акционерная Компания "АЛРОСА" (публичное акционерное общество) (АК "АЛРОСА" (ПАО)) Буровая коронка
US12076797B2 (en) 2019-11-14 2024-09-03 Milwaukee Electric Tool Corporation Hole saw with large carbide overhang

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603499A1 (de) * 1985-05-07 1986-11-13 Geißler & Kuper GmbH Diamantwerkzeug - Wiederaufbereitung, 3100 Celle Diamantbohrkrone mit schaftrohr und rohrgewindeanschluss
DE3533929A1 (de) * 1985-05-07 1986-11-13 Geißler & Kuper GmbH Diamantwerkzeug - Wiederaufbereitung, 3100 Celle Diamantbohrkrone mit schaftrohr und rohrgewindeanschluss
DE3706641A1 (de) * 1987-03-02 1988-09-15 Hilti Ag Hohlbohrer
DE8805449U1 (de) * 1988-04-25 1988-06-09 Maier, Wolfgang, 5630 Remscheid Diamant-Kernbohrer
DE19650480A1 (de) * 1996-12-05 1998-06-10 Ofra Struhalla Diamant-Werkzeug
DE202004010916U1 (de) * 2004-07-12 2005-11-24 Diewe Diamantwerkzeuge Gmbh Bohrkrone und Bohrkronensegment
CN114183079A (zh) * 2021-11-15 2022-03-15 河南黄河旋风股份有限公司 具备加水排渣功能的钻筒

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2404029A1 (de) * 1974-01-29 1975-08-07 Krupp Ag Huettenwerke Verfahren zum kern- oder vollbohren und bohrkopf, insbesondere zur durchfuehrung des verfahrens
DE2026855B2 (de) * 1969-06-05 1976-07-01 Hougen, Everett Douglas, Flint, Mich. (V.St.A.) Werkzeug zum ausschneiden von scheiben
US4267814A (en) * 1979-12-06 1981-05-19 Federal-Mogul Corporation Abrasive saw blade for trapezoidal grooving
AT373196B (de) * 1980-11-11 1983-12-27 Swarovski Tyrolit Schleif Hohlbohrer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1583845A1 (de) * 1968-02-19 1970-09-24 Zentrales Reparatur Und Ausrue Bohrkrone fuer Tief-,Schuerf-,Untersuchungs- und anderweitige Bohrungen
US3537538A (en) * 1969-05-21 1970-11-03 Christensen Diamond Prod Co Impregnated diamond bit
BE874985A (fr) * 1979-03-21 1979-07-16 Diamant Boart Sa Couronne de sondage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2026855B2 (de) * 1969-06-05 1976-07-01 Hougen, Everett Douglas, Flint, Mich. (V.St.A.) Werkzeug zum ausschneiden von scheiben
DE2404029A1 (de) * 1974-01-29 1975-08-07 Krupp Ag Huettenwerke Verfahren zum kern- oder vollbohren und bohrkopf, insbesondere zur durchfuehrung des verfahrens
US4267814A (en) * 1979-12-06 1981-05-19 Federal-Mogul Corporation Abrasive saw blade for trapezoidal grooving
AT373196B (de) * 1980-11-11 1983-12-27 Swarovski Tyrolit Schleif Hohlbohrer

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0221548A2 (fr) * 1985-11-05 1987-05-13 Disco Abrasive Systems, Ltd. Outil de découpage pourvu de couches abrasives intérieures et extérieures disposées concentriquement et son procédé de fabrication
EP0221548A3 (en) * 1985-11-05 1988-12-21 Disco Abrasive Systems, Ltd. Cutting tool having concentrically arranged outside and inside abrasive grain layers and method for production thereof
DE8715431U1 (de) * 1986-12-10 1988-04-07 Fa. Herbert Happe, 5600 Wuppertal Bohrvorrichtung zum Ausschneiden von Ringschlitzen
EP0583629A1 (fr) * 1992-08-10 1994-02-23 Bauer Spezialtiefbau GmbH Couronne de forage avec des éléments dentés répartis sur la périphérie et disposés de façon amovible
EP0857552A2 (fr) * 1997-01-27 1998-08-12 Tyrolit Schleifmittelwerke Swarovski KG Elément pour couper de la pierre ayant une résistance accrue à l'usure
EP0857552A3 (fr) * 1997-01-27 2000-02-09 Tyrolit Schleifmittelwerke Swarovski KG Elément pour couper de la pierre ayant une résistance accrue à l'usure
EP1681151A2 (fr) * 1998-09-10 2006-07-19 Atock Co., Ltd. Outil de carottage et machines utilisant un tel outil
EP0985505A3 (fr) * 1998-09-10 2003-12-10 Atock Co., Ltd. Lame de scie circulaire, lame de scie annulaire à tranchant interne et machine utilisant ces outils
EP0985505A2 (fr) * 1998-09-10 2000-03-15 Atock Co., Ltd. Lame de scie circulaire, lame de scie annulaire à tranchant interne et machine utilisant ces outils
EP1681151A3 (fr) * 1998-09-10 2006-07-26 Atock Co., Ltd. Outil de carottage et machines utilisant un tel outil
GB2423538A (en) * 2005-02-24 2006-08-30 Marcrist Internat Ltd Core drilling segments with side protection
GB2423540A (en) * 2005-02-24 2006-08-30 Marcrist Internat Ltd Core drills and cutting discs
GB2423537A (en) * 2005-02-24 2006-08-30 Marcrist Internat Ltd Core drills
GB2423536A (en) * 2005-02-24 2006-08-30 Marcrist Internat Ltd Diamond core drill
RU168413U1 (ru) * 2016-05-18 2017-02-02 Акционерная Компания "АЛРОСА" (публичное акционерное общество) (АК "АЛРОСА" (ПАО)) Буровая коронка
US12076797B2 (en) 2019-11-14 2024-09-03 Milwaukee Electric Tool Corporation Hole saw with large carbide overhang

Also Published As

Publication number Publication date
EP0156762B1 (fr) 1988-05-18
DE3562725D1 (en) 1988-06-23
ATE34329T1 (de) 1988-06-15
DE3408092A1 (de) 1985-09-19

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