EP0334806A1 - Couronne de forage de roche - Google Patents

Couronne de forage de roche Download PDF

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Publication number
EP0334806A1
EP0334806A1 EP89810149A EP89810149A EP0334806A1 EP 0334806 A1 EP0334806 A1 EP 0334806A1 EP 89810149 A EP89810149 A EP 89810149A EP 89810149 A EP89810149 A EP 89810149A EP 0334806 A1 EP0334806 A1 EP 0334806A1
Authority
EP
European Patent Office
Prior art keywords
rock
area
drilling tool
drill
cutting bodies
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
EP89810149A
Other languages
German (de)
English (en)
Other versions
EP0334806B1 (fr
Inventor
Josef Obermeier
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 AT89810149T priority Critical patent/ATE95888T1/de
Publication of EP0334806A1 publication Critical patent/EP0334806A1/fr
Application granted granted Critical
Publication of EP0334806B1 publication Critical patent/EP0334806B1/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
    • E21B10/02—Core bits
    • E21B10/04—Core bits with core destroying means
    • 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

Definitions

  • the invention relates to a rock drilling tool with a drill bit, which has a region which widens in the feed direction in the inner and outer diameter and is provided with at least one essentially axially extending passage opening for the cuttings which is open to the outer contour.
  • Rock drilling tools known from DE-OS 2 856 205 have a shank and a bell-shaped drilling head at the front end.
  • the drill head is provided with cutting pins on its face.
  • the drill head has grooves extending from the circumference, which serve for the passage of the cuttings. After the guide length of this drill head is short, it is not possible to produce precise bores, for example for receiving mechanical anchors. Due to the complex shape, these drilling tools can only be manufactured by forging and subsequent machining, which leads to high manufacturing costs.
  • a bell-like chisel tool can be seen from DE-PS 2 928 445, which is used together with an impact-emitting device.
  • This tool is at least partially tapered on the outside and inside in the feed direction.
  • the front end of the tool in the setting direction is designed as a ring cutter.
  • the tool also has through-openings which are inclined to the longitudinal axis and lead from the inside to the outside and which serve to discharge the cuttings which are broken and crushed by the conical inner shape. Due to the design for purely striking operation, no requirements regarding guidance are made on this tool used for earth drilling.
  • the invention has for its object to provide a rock drilling tool that is suitable for creating deeper holes with a precise geometric shape and can be produced economically.
  • this is achieved in that, in the feed direction, the area with a widening inside and outside diameter is adjoined by a cylindrical area with a constant inside and outside diameter, the end face of which is provided with cutting bodies along the circumference.
  • the shape proposed according to the invention enables economical production, in particular by extrusion.
  • the decisive factor here is the fact that there are no major jumps in the material thickness. Due to the conical design in connection with the cylindrical area, ideal conditions for an extrusion process are also given from the point of view of the material flow. It also enables better shock transmission.
  • the cylindrical area adjoining the area with a widening inside and outside diameter in the feed direction creates a good guidance of the drilling tool in the borehole.
  • the cutting bodies arranged on the end face are used to process the subsoil, the core which remains standing being broken and crushed when it hits the conical area of the drill bit, so that the resulting cuttings emerge from the through the openings Drill bit can come out and get into the area of a transport helix which may adjoin the drill bit on the back.
  • Wear-resistant elements can be arranged in the conical overrun area.
  • the cutting bodies expediently project axially beyond the cylindrical region.
  • An annular groove is cut out by these cutting bodies projecting beyond the cylindrical region when working with the drilling tool according to the invention.
  • the crown body itself hardly comes into direct contact with the surface. On the one hand, this enables good removal of the cuttings and, on the other hand, prevents wear on the crown body.
  • the cutting bodies advantageously protrude radially from the cylindrical region, with a protrusion both outwards and inwards. This enables free cutting and prevents the cylindrical area of the crown body from touching the borehole wall.
  • the cutting bodies are expediently designed in the form of a pin. Such cutting bodies can be accommodated in bores in the drill bit and are therefore precisely positioned, whereby they are also simple to manufacture and, under certain circumstances, can be replaced by the user himself.
  • the length of the cylindrical region is expediently 0.2 to 3 times the outside diameter. A length of the cylindrical area lying in this area creates good guidance.
  • the drill bit is advantageously provided with a centering drill which projects axially above it.
  • the center drill At the start of the drilling process, the center drill first drills into the ground. If the drill bit then comes into engagement with the subsurface, the center drill becomes one prevents the drilling tool from running.
  • the center drill is subject to a relatively high level of wear and should therefore be replaceable, since the tool is only partially functional in the event of a failure.
  • the rock drilling tool shown in FIGS. 1 to 3 essentially consists of a shank 1 which is provided with longitudinal grooves 2 in its rear end region. These longitudinal grooves 2 are used for the axial mounting and the rotary driving of the drilling tool.
  • the shaft 1 is provided with a conical region 3 that widens in the feed direction and has an inner and outer diameter that widens in the feed direction.
  • a cylindrical region 4 adjoins the conical region 3.
  • the length L of this cylindrical region 4 is approximately 0.2 to 3 times the outer diameter D.
  • the front end of the cylindrical region 4 is designed as an annular cutting edge 5.
  • the conical region 3 is provided with through openings 6 which serve to discharge the cuttings formed in the interior of the drill bit.
  • the inside of the drill bit is provided with a receiving bore 7 for a centering drill 8 axially projecting beyond the drill bit.
  • a centering drill 8 axially projecting beyond the drill bit.
  • the drill bit is in the area of the cutting edge 5 with pin-shaped Migen cutting bodies 9 provided.
  • These cutting bodies 9 are preferably hard metal pins. However, these cutting bodies 9 can also be plate-shaped or consist of synthetic diamonds embedded in a matrix.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP89810149A 1988-03-21 1989-02-27 Couronne de forage de roche Expired - Lifetime EP0334806B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810149T ATE95888T1 (de) 1988-03-21 1989-02-27 Gesteinsbohrkrone.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3809428 1988-03-21
DE3809428A DE3809428A1 (de) 1988-03-21 1988-03-21 Gesteinsbohrkrone

Publications (2)

Publication Number Publication Date
EP0334806A1 true EP0334806A1 (fr) 1989-09-27
EP0334806B1 EP0334806B1 (fr) 1993-10-13

Family

ID=6350274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810149A Expired - Lifetime EP0334806B1 (fr) 1988-03-21 1989-02-27 Couronne de forage de roche

Country Status (5)

Country Link
EP (1) EP0334806B1 (fr)
JP (1) JPH01284690A (fr)
AT (1) ATE95888T1 (fr)
DE (2) DE3809428A1 (fr)
DK (1) DK125989A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0595214A2 (fr) * 1992-10-29 1994-05-04 Hawera Probst GmbH + Co. Foret à roche
CN102134850A (zh) * 2011-01-08 2011-07-27 洪子云 金钢钻吸土成孔钻头
WO2013053542A1 (fr) * 2011-10-13 2013-04-18 Robert Bosch Gmbh Couronne de forage à percussion
CN103383319A (zh) * 2012-05-03 2013-11-06 中国石油化工股份有限公司 密闭保型取心岩心保鲜处理结构及其保鲜处理方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5279607A (en) * 1991-05-30 1994-01-18 The State University Of New York Telemetry capsule and process
DE4301191A1 (de) * 1993-01-19 1994-07-21 Hawera Probst Kg Hartmetall Gesteinsbohrwerkzeug

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2334453A (en) * 1942-04-30 1943-11-16 Peter J Swofford Speed rock bit
US4101238A (en) * 1976-01-22 1978-07-18 Robert Bosch Gmbh Hole saw with particle-aspirating accessory for hand drill
DE2807198A1 (de) * 1978-02-20 1979-08-30 Heller Verwaltungsges Verfahren zum herstellen einer bohrkrone und nach dem verfahren hergestellte bohrkrone
DE2856205A1 (de) * 1978-12-27 1980-07-10 Hilti Ag Gesteinsbohrer
DE2913501A1 (de) * 1979-04-04 1980-10-16 Bosch Gmbh Robert Hohlbohrer mit bohrkrone
AT360734B (de) * 1979-08-17 1981-01-26 Swarovski Tyrolit Schleif Hohlbohrer
DE2928445A1 (de) * 1979-06-13 1981-01-29 Inst Gornogo Dela Sibirskogo O Bohrwerkzeug fuer schlagmaschinen
EP0054721A1 (fr) * 1980-12-24 1982-06-30 Hawera Probst GmbH + Co. Trépan de forage particulièrement pour la pierre
DE3515735C1 (en) * 1985-05-02 1987-01-15 Jaroslav Dvorak Boring head for a percussion boring device
DE3619334A1 (de) * 1986-06-09 1987-12-10 Erich Wezel Hohlbohrkrone

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2334453A (en) * 1942-04-30 1943-11-16 Peter J Swofford Speed rock bit
US4101238A (en) * 1976-01-22 1978-07-18 Robert Bosch Gmbh Hole saw with particle-aspirating accessory for hand drill
DE2807198A1 (de) * 1978-02-20 1979-08-30 Heller Verwaltungsges Verfahren zum herstellen einer bohrkrone und nach dem verfahren hergestellte bohrkrone
DE2856205A1 (de) * 1978-12-27 1980-07-10 Hilti Ag Gesteinsbohrer
DE2913501A1 (de) * 1979-04-04 1980-10-16 Bosch Gmbh Robert Hohlbohrer mit bohrkrone
DE2928445A1 (de) * 1979-06-13 1981-01-29 Inst Gornogo Dela Sibirskogo O Bohrwerkzeug fuer schlagmaschinen
AT360734B (de) * 1979-08-17 1981-01-26 Swarovski Tyrolit Schleif Hohlbohrer
EP0054721A1 (fr) * 1980-12-24 1982-06-30 Hawera Probst GmbH + Co. Trépan de forage particulièrement pour la pierre
DE3515735C1 (en) * 1985-05-02 1987-01-15 Jaroslav Dvorak Boring head for a percussion boring device
DE3619334A1 (de) * 1986-06-09 1987-12-10 Erich Wezel Hohlbohrkrone

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0595214A2 (fr) * 1992-10-29 1994-05-04 Hawera Probst GmbH + Co. Foret à roche
EP0595214A3 (fr) * 1992-10-29 1995-03-01 Hawera Probst Kg Hartmetall Foret à roche.
CN102134850A (zh) * 2011-01-08 2011-07-27 洪子云 金钢钻吸土成孔钻头
WO2013053542A1 (fr) * 2011-10-13 2013-04-18 Robert Bosch Gmbh Couronne de forage à percussion
DE102011090063B4 (de) 2011-10-13 2024-07-04 Robert Bosch Gmbh Hammerbohrkrone
CN103383319A (zh) * 2012-05-03 2013-11-06 中国石油化工股份有限公司 密闭保型取心岩心保鲜处理结构及其保鲜处理方法

Also Published As

Publication number Publication date
DK125989D0 (da) 1989-03-15
ATE95888T1 (de) 1993-10-15
DE58905867D1 (de) 1993-11-18
DE3809428A1 (de) 1989-10-12
DK125989A (da) 1989-09-22
EP0334806B1 (fr) 1993-10-13
JPH01284690A (ja) 1989-11-15

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