EP0707129A2 - Outil de forage avec support et éléments de coupe - Google Patents

Outil de forage avec support et éléments de coupe Download PDF

Info

Publication number
EP0707129A2
EP0707129A2 EP95810469A EP95810469A EP0707129A2 EP 0707129 A2 EP0707129 A2 EP 0707129A2 EP 95810469 A EP95810469 A EP 95810469A EP 95810469 A EP95810469 A EP 95810469A EP 0707129 A2 EP0707129 A2 EP 0707129A2
Authority
EP
European Patent Office
Prior art keywords
cutting
drilling
measured
width
carrier body
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
EP95810469A
Other languages
German (de)
English (en)
Other versions
EP0707129A3 (fr
EP0707129B1 (fr
Inventor
Werner Kleine
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
Publication of EP0707129A2 publication Critical patent/EP0707129A2/fr
Publication of EP0707129A3 publication Critical patent/EP0707129A3/fr
Application granted granted Critical
Publication of EP0707129B1 publication Critical patent/EP0707129B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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 drilling tool with a carrier body and one or more cutting bodies, the width of which, measured in the radial direction, decreases continuously continuously in part counter to the drilling direction, the cutting bodies projecting radially and axially beyond the circumferential contour of the carrier body.
  • Drilling tools of the type in question are used to mine rock, concrete, masonry and the like materials. In particular in the construction of the carrier bodies, they can be designed differently. However, the drilling tools have in common that they have one or more cutting bodies in the end region on the drilling direction, these cutting bodies being made of wear-resistant material such as hard metal. Hard material or the like exist.
  • the support body From the point of view of the support body, there is, for example, the possibility of designing it in the form of a shaft which carries a helix on the circumference, which can be integrally formed on or connected to it.
  • the carrier body On the drilling direction side and radially, the carrier body is protruded by cutting bodies, with smaller diameters being able to be a single cutting element and larger diameters being several cutting elements.
  • Such a drilling tool, especially for larger diameters is known for example from DE-PS 25 43 578.
  • the carrier body As a hollow drill bit.
  • the area of the carrier body on the drilling direction side is protruded both axially and radially by cutting bodies, which are distributed over the circumference on the carrier body designed as a hollow drill bit.
  • the length of the cutting body in the direction of drilling must not be less than a minimum so that there is a sufficiently large contact area between the cutting body and the carrier body which is capable of transmitting the forces which occur.
  • a hollow core bit is known for example from DE-PS 24 19 548.
  • the cutting bodies have in common that their width, measured in the radial direction, decreases continuously in the opposite direction to the drilling direction.
  • the surface of the cutting bodies rubbing against the wall of the bore to be produced becomes longer and longer in the opposite direction to the drilling direction, which means that the efficiency of the drilling tools decreases considerably as the friction increases continuously.
  • the surface of the cutting bodies rubbing against the wall of the bore to be produced extends over their entire axial length, ie also over the length by which the cutting bodies are embedded in the carrier body. This ultimately leads to overloading of the drive devices and jamming of the drilling tools in the bore to be produced.
  • the invention has for its object to provide a drilling tool in which the friction of the cutting body against the wall of the bore to be produced is not increased in a manner which reduces the efficiency, even with prolonged use.
  • the object is achieved in that the width of the cutting bodies, measured in the radial direction, decreases in one step, contrary to the drilling direction, following the continuous decrease.
  • the decrease according to the invention of the width of the cutting bodies measured in the radial direction in the form of a step leads to a kind of waist of the cutting bodies in their radially measured width.
  • the result of this is that even after the drilling tools have been used for a long time, the length of the cutting bodies leading to friction on the wall of the bore to be produced extends up to the step counter to the drilling direction. A maximum allowable amount of friction is therefore not exceeded, regardless of the length of use of the drilling tools.
  • the friction increases to a certain extent with continued use.
  • the maximum amount of friction can be limited by the step according to the invention in such a way that the friction does not yet have an influence on efficiency. This maximum amount depends on the choice of the arrangement of the step, in which respect it has been shown that preferred values arise when the dimension measured in the axial direction from the free end of the cutting body to the step of reduction is approximately 0.3 to 0. 5 times the total length of the cutting body measured in the axial direction.
  • the step of reduction lies in the region of the end of the carrier body on the drilling direction side. This ensures that at most the area projecting in the axial direction contributes to the formation of the length responsible for the friction.
  • the area which serves for the integration of the cutting bodies in the carrier body cannot therefore lead to an inadmissible increase in the friction of the drilling tool on the wall of the bore to be produced.
  • a sufficient reduction in the width of the cutting body measured in the radial direction must be ensured after the step. This is achieved if the width of the cutting bodies at the step, measured in the radial direction, is reduced by at least 30% of the amount by which the cutting bodies project radially beyond the drilling direction following the step after the step. This means that the width of the cutting body measured in the radial direction can be reduced after the step up to a maximum of the outer contour of the carrier body.
  • the width measured in the radial direction decreases on both broad sides of the cutting bodies in one step.
  • the carrier body is a hollow drill bit, the width of the cutting body measured in the radial direction, contrary to the drilling direction, then decreasing in one step towards the inner and outer contour of the carrier body, following the continuous decrease.
  • the cutting bodies are expediently constructed symmetrically, ie the width of the cutting bodies measured in the radial direction is reduced in one step on both broad sides.
  • the step preferably coincides essentially with the end of the support body on the drilling direction side.
  • the cutting body 2 is embedded in the carrier body 1.
  • the width R of the cutting body 2 measured in the radial direction continuously decreases in the area K, up to a step S.
  • step S there is a further decrease in the width R measured in the radial direction
  • the step S essentially coincides with the end E of the carrier body 1 on the drilling direction side.
  • the cutting body 2 projects beyond the end E of the carrier body 1 on the drilling direction, the entire length of the cutting body 2 corresponding to the dimension A.
  • the drilling tool according to FIG. 2 has a carrier grain 3 designed as a hollow drill bit, in which cutting bodies 4 are embedded.
  • the cutting bodies 4 protrude beyond the wall thickness of the carrier body 3 in the radial direction and exceed the end E of the carrier body 3 on the drilling direction side.
  • the width R of the cutting bodies 4, measured in the radial direction decreases continuously in the range K up to the step S against the drilling direction.
  • the width R measured in the radial direction is further reduced in this way that the wall thickness of the carrier body 3 is only slightly exceeded by the cutting bodies 4 in the radial direction.
  • Step S coincides - as the example shown in FIG. 2 shows - with the end E of the support body 3 on the drilling direction side.
  • the cutting bodies 4 exceed the end E of the carrier body 3 on the drilling direction in the drilling direction, while the entire length of the cutting bodies 4 corresponds to the dimension A.
  • the width R of the cutting bodies 2, 4 measured in the radial direction still slightly protrudes from the support body 1, 3 against the drilling direction after step S. In extreme cases, this protrusion can be completely reduced, so that the radial width of the cutting bodies 2, 4 measured in this area corresponds to the extent of the carrier body 1, 3 measured in the radial direction — in the case of a hollow core bit, the wall thickness thereof.

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)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP95810469A 1994-10-15 1995-07-17 Outil de forage avec support et éléments de coupe Expired - Lifetime EP0707129B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4436916A DE4436916A1 (de) 1994-10-15 1994-10-15 Bohrwerkzeug mit Trägerkörper und Schneidkörpern
DE4436916 1994-10-15

Publications (3)

Publication Number Publication Date
EP0707129A2 true EP0707129A2 (fr) 1996-04-17
EP0707129A3 EP0707129A3 (fr) 1997-08-06
EP0707129B1 EP0707129B1 (fr) 1999-06-16

Family

ID=6530875

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810469A Expired - Lifetime EP0707129B1 (fr) 1994-10-15 1995-07-17 Outil de forage avec support et éléments de coupe

Country Status (11)

Country Link
US (1) US5628376A (fr)
EP (1) EP0707129B1 (fr)
JP (1) JP3706664B2 (fr)
KR (1) KR100318971B1 (fr)
CN (1) CN1081280C (fr)
AT (1) ATE181398T1 (fr)
CA (1) CA2160042C (fr)
DE (2) DE4436916A1 (fr)
DK (1) DK0707129T3 (fr)
FI (1) FI111980B (fr)
HU (1) HU216401B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4163037A1 (fr) * 2021-10-11 2023-04-12 Hilti Aktiengesellschaft Couronne de forage à enlèvement amélioré de la carotte

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970006498A (ko) * 1995-07-31 1997-02-21 유충식 활성형 인성장호르몬의 정제 방법
DE10054850B4 (de) * 2000-11-04 2009-08-06 Hilti Aktiengesellschaft Bohrer für Gestein
US6599063B1 (en) * 2002-08-31 2003-07-29 Richard E. Capstran Hole saw having efficient slug removal
US6817429B2 (en) 2002-10-03 2004-11-16 Jimmie Sollami Roof bit carbide blade
US7363118B2 (en) * 2004-08-02 2008-04-22 Volvo Trucks North America, Inc. Methods and apparatus for reducing vehicle tire wear
US9279292B2 (en) 2013-11-20 2016-03-08 Longyear Tm, Inc. Drill bits having flushing and systems for using same
US8459381B2 (en) 2006-12-14 2013-06-11 Longyear Tm, Inc. Drill bits with axially-tapered waterways
US9500036B2 (en) 2006-12-14 2016-11-22 Longyear Tm, Inc. Single-waterway drill bits and systems for using same
US7628228B2 (en) * 2006-12-14 2009-12-08 Longyear Tm, Inc. Core drill bit with extended crown height
US9506298B2 (en) 2013-11-20 2016-11-29 Longyear Tm, Inc. Drill bits having blind-hole flushing and systems for using same
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
DE102011081443A1 (de) * 2011-08-23 2013-02-28 Robert Bosch Gmbh Bohrkrone, insbesondere Stahlbetonbohrkrone
CN103042606A (zh) * 2012-12-17 2013-04-17 天津市泽华工艺品有限公司 一种多级台阶式石材加工钻筒
EP2745966A1 (fr) 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Trépan doté d'une section de coupe interchangeable
PE20171462A1 (es) 2015-01-12 2017-10-11 Longyear Tm Inc Herramientas de perforacion que tienen matrices con aleaciones que forman carburo y metodos para fabricarlas y utilizarlas

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2419548A1 (de) 1974-04-23 1975-11-06 Hawera Probst Kg Hartmetall Bohrwerkzeug, insbesondere fuer bohrhaemmer
DE2543578A1 (de) 1975-09-30 1977-04-07 Duss Maschf Gesteinsbohrer

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1204805A (en) * 1912-09-11 1916-11-14 Cathrine Macdonald Drill.
US1112498A (en) * 1913-05-01 1914-10-06 Louis Jean Chretien Van Es Drill.
DE384829C (de) * 1921-07-15 1923-11-06 Erich Horn Anschlaege fuer die geloesten Bremskloetze, insbesondere fuer Kraftfahrzeuge
DE385938C (de) * 1922-11-28 1923-12-14 Albert Nuernberg Gesteinbohrer
FR889080A (fr) * 1942-01-16 1943-12-30 Flottmann Ag Foret de mine à tranchant en métal dur rapporté
DE800853C (de) * 1948-10-02 1950-12-11 Adolf Meutsch Spitzeisen fuer Abbauhaemmer
DE834829C (de) * 1949-02-06 1952-03-24 Herbert Jeschke Dr Ing Gesteinsschlagbohrer mit loesbar aufgesetzter Bohrkrone
US2998086A (en) * 1954-09-27 1961-08-29 Joseph Morris Reciprocating core drill
DE3105268A1 (de) * 1980-11-03 1982-06-09 Robert Bosch Gmbh, 7000 Stuttgart Bohrkrone
DE4003374C1 (fr) * 1990-02-05 1991-05-08 Sfs Stadler Holding Ag, Heerbrugg, Ch
DE9308443U1 (de) * 1993-06-05 1993-08-19 Bilfinger Berger Bau Vollbohrkrone zum Herstellen von verrohrten Erdbohrungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2419548A1 (de) 1974-04-23 1975-11-06 Hawera Probst Kg Hartmetall Bohrwerkzeug, insbesondere fuer bohrhaemmer
DE2543578A1 (de) 1975-09-30 1977-04-07 Duss Maschf Gesteinsbohrer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4163037A1 (fr) * 2021-10-11 2023-04-12 Hilti Aktiengesellschaft Couronne de forage à enlèvement amélioré de la carotte
WO2023061752A1 (fr) * 2021-10-11 2023-04-20 Hilti Aktiengesellschaft Couronne de forage avec retrait amélioré de la carotte

Also Published As

Publication number Publication date
KR960014591A (ko) 1996-05-22
FI954850A0 (fi) 1995-10-12
KR100318971B1 (ko) 2002-04-22
HU216401B (hu) 1999-06-28
US5628376A (en) 1997-05-13
DK0707129T3 (da) 1999-12-13
CA2160042A1 (fr) 1996-04-16
HU9502975D0 (en) 1995-12-28
EP0707129A3 (fr) 1997-08-06
JP3706664B2 (ja) 2005-10-12
EP0707129B1 (fr) 1999-06-16
CA2160042C (fr) 1999-01-12
JPH08199964A (ja) 1996-08-06
HUT72769A (en) 1996-05-28
FI111980B (fi) 2003-10-15
ATE181398T1 (de) 1999-07-15
DE4436916A1 (de) 1996-04-18
CN1081280C (zh) 2002-03-20
CN1128321A (zh) 1996-08-07
DE59506217D1 (de) 1999-07-22
FI954850A (fi) 1996-04-16

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