EP1083293A1 - Outil de forage - Google Patents

Outil de forage Download PDF

Info

Publication number
EP1083293A1
EP1083293A1 EP00810739A EP00810739A EP1083293A1 EP 1083293 A1 EP1083293 A1 EP 1083293A1 EP 00810739 A EP00810739 A EP 00810739A EP 00810739 A EP00810739 A EP 00810739A EP 1083293 A1 EP1083293 A1 EP 1083293A1
Authority
EP
European Patent Office
Prior art keywords
drill head
drilling tool
cutting edges
area
head
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
EP00810739A
Other languages
German (de)
English (en)
Other versions
EP1083293B1 (fr
Inventor
Werner Kleine
Hans-Werner Bongers-Ambrosius
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 EP1083293A1 publication Critical patent/EP1083293A1/fr
Application granted granted Critical
Publication of EP1083293B1 publication Critical patent/EP1083293B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E21B10/58—Chisel-type inserts
    • 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
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • 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
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry

Definitions

  • the invention relates to a drilling tool, in particular a rock drill, according to the preamble of claim 1.
  • Drilling tools are used to drill holes in concrete, masonry, stone and the like used a drill head with cutting edges made of a cutting material, preferably made of a hard metal.
  • the drilling tools are Usually used in hand-held drilling rigs, which in addition to the rotary drive of the Drilling tool also generate axial blows.
  • the axial blows are on the in the Tool holder of the drilling tool inserted shaft end of the drilling tool released and over the shaft and the drill head into the surface to be machined initiated. In this way, the surface is chipped, chiseled and dismantled chip by chip.
  • the drilling tools have the longest possible service life.
  • Drilling tool has a shaft with an insertion end for a hand-held one Drill. At the opposite end there is a drill head, the three Has cutting, which is provided on star-shaped carbide inserts are. The cutting edges are separated from each other by head flour grooves, which are in discharge grooves for the drilling dust, which spiral around the shaft.
  • the object of the present invention is therefore to overcome these disadvantages of the drilling tools to remedy the state of the art.
  • a drilling tool is to be created at regardless of the diameter of the drill head, even when creating Drilling in reinforced concrete, the risk of the drill head getting caught on Reinforcing iron is reduced.
  • the drilling tool is said to make good drilling progress have little effort and a long service life.
  • the drilling tool created by the invention in particular a rock drill has a shank with one end at it Connects plug-in end for the tool holder of a drill and its at the other end a drill head with at least two cutting edges formed from hard metal has, which project radially beyond the circumference of the drill head. At least partially Between the hard metal cutting edges there are head flour grooves, which are in at least one, The discharge groove runs helically around the shaft.
  • the formation of the drill head is such that the drill head is at least in the region of two of the hard metal cutting edges has an expanded circumferential contour, which radially surrounds the circumference of the shaft towered over.
  • the inventive design of the drill head in the area of the hard metal cutting edges their radial overhang is reduced. This will make the tendency radial protruding carbide cutting edges, to get caught on reinforcement hits, counteracted, without significantly increasing the friction of the drilling tool in the borehole increase.
  • the inserts are especially in Foot area better supported. Due to the improved embedding in the drill head, the Reduced risk of loosening and falling out of the carbide inserts, and the The service life of the drilling tool is increased.
  • the drill head region expediently has a radially expanded circumferential contour compared to the shaft a maximum radial projection that is about 2% to about Is 10% of the shaft radius. At these values for the radial projection, there is one given significant improvement in the support of the carbide cutting edges without the Significantly increase friction with the borehole wall.
  • the drill head region extends radially extended circumferential contour on both sides of a lateral guide area of the Tungsten carbide cutting over an angular range of approximately 5 ° to approximately 30 °.
  • the radial one Extension of the lateral guide area improves the behavior of the Drilling tool for reinforcement hits.
  • Cutting edges arranged on hard metal plates also have improved embedding in the material of the circumferential direction Drill head on. This makes the embedded carbide cutting edges less sensitive against the transverse forces acting in the circumferential direction during material degradation.
  • the imaginary circumferential contour of the drill head in the area of the flute grooves has a smaller radial distance from the central axis than in the lateral guide area the carbide cutting, the frictional resistance in operation is reduced, and the Drilling progress can be improved.
  • the drilling tool has a drilling head that has three Has outstanding carbide cutting edges.
  • the hard metal cutting edges are included preferably arranged symmetrically, star-shaped and each by an im essentially axially running head meal groove separated from each other.
  • the drill head is in the entire lateral Guide area of the carbide cutting edges has a diameter that is larger than the diameter of the shaft.
  • Tungsten carbide cutting is provided on platelet-shaped inserts, which in the front of the Drill head are used.
  • Each plate-shaped insert has a side Guide surface that with the axial extension of the drill head area with enlarged outer contour runs so inclined that the plate-shaped insert on its free end compared to the drill head a greater radial projection exhibits than in the embedded foot part.
  • the drilling tool according to the invention extends the cutting edge of the Cutting tip, starting from a completely in the extended drill head area embedded foot section, radially outwards in the direction of the free end. This means that a very good radial support of the cutting tip is sufficient radial Overhang guaranteed to keep the friction on the borehole wall low can.
  • the drill head is expediently made entirely of hard metal.
  • the higher cost of this Variations are made possible by the advantages of the very simple, almost arbitrary Shape of the carbide head more than compensated. The advantages are also Consider handling during assembly.
  • the drilling tool 1 which is, for example, a rock drill is involved, comprises a shaft 2, one end of which, not shown in more detail, engages Connects plug-in end for the tool holder of a drill.
  • the shaft 2 is with helical circumferential discharge grooves 3 for those to be removed in use Drill bits equipped.
  • a drill head 4 At the opposite end of the shaft 2 is a drill head 4 arranged, the cutting edges 5, 6 formed from hard metal.
  • the illustrated 1 and 2 are two types of cutting edges on the drill head 4 arranged.
  • the drill head 4 In its central area, the drill head 4 essentially has one star-shaped, three-beam center cutting edge 6, the radial Extension essentially extends to the central area of the drill head 4 limited.
  • the peripheral area of the drill head 4 In the peripheral area of the drill head 4 there are three further cutting edges 5 arranged which extend substantially radially and the circumference of the drill head 4 protrude radially.
  • the peripheral cutting edges 5 are, for example, plate-shaped Inserts made of hard metal, which extends approximately radially with the foot area Grooves are embedded in the end face of the drill head 4.
  • the three cutting edges are 5 for example, at a uniform angular distance from each other over the circumference of the Drill head 4 distributed.
  • Head grooves 7 are provided between the peripheral cutting edges 5, which lead into the discharge grooves 3 which run helically around the shaft.
  • there a discharge groove 3 can be assigned to each head groove 7. But less can Removal grooves 3 can be provided as head grooves 7. In this case, for example two head grooves 7 in the same discharge groove 3.
  • the drill head 4 has in the area of hard metal existing circumferential cutting 5 on an expanded circumferential contour 8, the circumference 9 of the shaft 2 protrudes radially.
  • the radial projection of the Drill head area with radially expanded circumferential contour 8 in FIG. 2 exaggerated.
  • the maximum radial projection r results from the difference of the maximum Distance a of the radially widened drill head area 8 to the radius s of the shank 2.
  • the maximum radial projection r is preferably about 2% to about 10% of the Shaft radius s.
  • the Axial extent I of the radially widened drill head region 8 is indicated in FIG. 4 and is advantageously at least the same size or greater than the length of the in the Drill head 4 embedded foot area of the cutting edges 5.
  • the lateral guide surfaces 10 of the peripheral cutting edges 5 inclined with respect to the axial extent I of the enlarged drill head area 8.
  • the transition of the drill head area is also extended circumferential contour 8 curved to the adjacent head flour groove 7.
  • that in the direction of rotation of the associated cutting edge 5 is preferred immediately leading edge of the head meal groove 7 is rounded, in particular continuously curved.
  • the second embodiment of the inventive shown in Fig. 5 The entire drilling tool is provided with the reference number 21. It makes a difference differs essentially from the first exemplary embodiment according to FIGS. 1-4, that the drill head 24 arranged on the shaft 22 has three cutting edges 25, which approximately run in a star shape and radially from the central drill head area to the circumference of the Extend drill head 24.
  • the three cutting edges 25 made of hard metal protrude above the drill head 24 in the radial direction and are separated from one another by head meal grooves 27.
  • Radially enlarged areas 28 of the drill head 24 are again indicated, which are located in the Extend the area of the cutting edges 25 and the circumference 29 of the shaft 22 radially tower over.
  • the drill head 4 or 24 can, as shown, have cutting edges 5, 6 or 25 which are on arranged in the front of the drill head 4 or 24 attachable hard metal inserts are. It can also be provided that the drill head has a larger diameter has than the shaft.
  • the circumferential contour of the drill head is in the area of Head flour grooves have a smaller radial center distance than in the side Guide area of the cutting edges arranged on the circumference.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
EP00810739A 1999-09-09 2000-08-21 Outil de forage Expired - Lifetime EP1083293B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19942986 1999-09-09
DE19942986A DE19942986A1 (de) 1999-09-09 1999-09-09 Bohrwerkzeug

Publications (2)

Publication Number Publication Date
EP1083293A1 true EP1083293A1 (fr) 2001-03-14
EP1083293B1 EP1083293B1 (fr) 2005-11-02

Family

ID=7921280

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00810739A Expired - Lifetime EP1083293B1 (fr) 1999-09-09 2000-08-21 Outil de forage

Country Status (6)

Country Link
US (1) US6405813B1 (fr)
EP (1) EP1083293B1 (fr)
JP (1) JP2001121331A (fr)
CN (1) CN1156641C (fr)
DE (2) DE19942986A1 (fr)
ZA (1) ZA200004375B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4375476A1 (fr) * 2022-11-22 2024-05-29 Hilti Aktiengesellschaft Perforatrice de roches à cinq lames

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10053344A1 (de) * 2000-10-27 2002-05-08 Hilti Ag Gesteinsbohrer
US7900721B2 (en) * 2008-11-03 2011-03-08 Irwin Industrial Tool Company Hard metal plate for rock drill and rock drill
EP2669033B1 (fr) 2012-05-29 2015-11-04 Black & Decker Inc. Tête de coupe pour un foret.
PL2990589T3 (pl) * 2014-08-25 2017-10-31 Sandvik Intellectual Property Ab Świder z zagłębioną powierzchnią tnącą
CN109674296B (zh) * 2019-01-17 2023-09-26 苏州美瑞德建筑装饰有限公司 一种树形绿植嵌入式集成结构
CN110253054B (zh) * 2019-06-28 2020-07-10 胜利油田盛辉石油技术开发有限责任公司 一种钻头
CN116446798B (zh) * 2023-06-14 2023-09-01 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) 一种钻探设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2040074A (en) * 1935-04-15 1936-05-12 R M Wright Jack hammer bit
EP0351493A2 (fr) * 1988-07-19 1990-01-24 Detlev Kretsch Foret pour la pierre
EP0563561A1 (fr) * 1992-04-02 1993-10-06 Boart HWF GmbH & Co. KG Hartmetallwerkzeugfabrik Trépan de forage superposé
EP0669448A1 (fr) 1994-02-28 1995-08-30 Plica Werkzeugfabrik Ag Plaque en métal dur et trépau de roche muni d'une telle plaque
DE19537900A1 (de) * 1995-10-11 1997-04-17 American Tool Co Drehbohrer
EP0778391A2 (fr) * 1995-12-07 1997-06-11 HILTI Aktiengesellschaft Perceuse rotative hélicoidale à percussion
DE19722518A1 (de) * 1997-05-30 1998-12-03 Hawera Probst Gmbh Bohrwerkzeug, insbesondere Gesteinsbohrer

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089552A (en) * 1961-10-24 1963-05-14 Mine Safety Appliances Co Rock drill tip holder
JPS53153004U (fr) * 1977-05-09 1978-12-01
JPS54127801U (fr) * 1978-02-27 1979-09-06
DE3742661A1 (de) * 1987-12-16 1989-07-13 Hawera Probst Kg Hartmetall Gesteinsbohrer
DE3820695C2 (de) * 1988-06-18 1996-07-25 Hawera Probst Kg Hartmetall Gesteinsbohrer
JPH0318687A (ja) * 1989-06-14 1991-01-28 Aisan Ind Co Ltd 燃料供給ポンプ
US5265688A (en) * 1990-04-09 1993-11-30 Hilti Aktiengesellschaft Rock drill
JP2960945B2 (ja) * 1990-05-14 1999-10-12 関西電力株式会社 深掘り削孔装置
DE4239257C2 (de) * 1992-11-21 1998-02-26 Mapal Fab Praezision Spitzbohrwerkzeug
DE19516270C1 (de) * 1995-05-09 1997-01-30 Heller Dinklage Gmbh Geb Bohrwerkzeug
DE19545647A1 (de) * 1995-12-07 1997-06-12 Hilti Ag Drehschlag-Wendelbohrer
DE19650487A1 (de) * 1996-12-05 1998-06-10 Hilti Ag Bohrwerkzeug
DE19707115A1 (de) * 1997-02-22 1998-08-27 Hilti Ag Bohr- und/oder Meisselwerkzeug
DE19807394A1 (de) * 1998-02-21 1999-08-26 Hilti Ag Bohr- und/oder Meisselwerkzeug
DE19916975A1 (de) * 1999-04-15 2000-10-19 Hilti Ag Gesteinsbohrer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2040074A (en) * 1935-04-15 1936-05-12 R M Wright Jack hammer bit
EP0351493A2 (fr) * 1988-07-19 1990-01-24 Detlev Kretsch Foret pour la pierre
EP0563561A1 (fr) * 1992-04-02 1993-10-06 Boart HWF GmbH & Co. KG Hartmetallwerkzeugfabrik Trépan de forage superposé
EP0669448A1 (fr) 1994-02-28 1995-08-30 Plica Werkzeugfabrik Ag Plaque en métal dur et trépau de roche muni d'une telle plaque
DE19537900A1 (de) * 1995-10-11 1997-04-17 American Tool Co Drehbohrer
EP0778391A2 (fr) * 1995-12-07 1997-06-11 HILTI Aktiengesellschaft Perceuse rotative hélicoidale à percussion
DE19722518A1 (de) * 1997-05-30 1998-12-03 Hawera Probst Gmbh Bohrwerkzeug, insbesondere Gesteinsbohrer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4375476A1 (fr) * 2022-11-22 2024-05-29 Hilti Aktiengesellschaft Perforatrice de roches à cinq lames
WO2024110190A1 (fr) * 2022-11-22 2024-05-30 Hilti Aktiengesellschaft Perforatrice de roches à cinq arêtes de coupe

Also Published As

Publication number Publication date
CN1156641C (zh) 2004-07-07
DE50011494D1 (de) 2005-12-08
EP1083293B1 (fr) 2005-11-02
ZA200004375B (en) 2001-02-28
JP2001121331A (ja) 2001-05-08
DE19942986A1 (de) 2001-03-15
US6405813B1 (en) 2002-06-18
CN1287898A (zh) 2001-03-21

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