EP1069278B1 - Dent de forage - Google Patents

Dent de forage Download PDF

Info

Publication number
EP1069278B1
EP1069278B1 EP00110438A EP00110438A EP1069278B1 EP 1069278 B1 EP1069278 B1 EP 1069278B1 EP 00110438 A EP00110438 A EP 00110438A EP 00110438 A EP00110438 A EP 00110438A EP 1069278 B1 EP1069278 B1 EP 1069278B1
Authority
EP
European Patent Office
Prior art keywords
tooth
drilling
shank
cutting edge
centre line
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
EP00110438A
Other languages
German (de)
English (en)
Other versions
EP1069278A1 (fr
Inventor
Werner Harthauser
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.)
Bauer Maschinen GmbH
Original Assignee
Bauer Maschinen GmbH
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 Bauer Maschinen GmbH filed Critical Bauer Maschinen GmbH
Publication of EP1069278A1 publication Critical patent/EP1069278A1/fr
Application granted granted Critical
Publication of EP1069278B1 publication Critical patent/EP1069278B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • E21B10/627—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements
    • E21B10/633—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements independently detachable
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2858—Teeth characterised by shape
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2866—Small metalwork for digging elements, e.g. teeth scraper bits for rotating digging elements
    • 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
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits

Definitions

  • the invention relates to a drill bit for earthworking with a tooth part and a shaft for releasably fixing in a holder of a drilling device, wherein a tooth edge of the tooth part lies outside a shaft center line and a tooth cutting plane extends at an angle of attack to the shaft centerline.
  • Drill teeth are used in drilling tools for earth drilling.
  • the drill teeth are arranged, for example, in a drill head side by side so that the straight drill teeth cutting, which lie in one plane, form a radially extending cutting line.
  • the moving on a circular path teeth with a fixed by the orientation of the bracket pressure angle of the cutting teeth are very unevenly loaded on the cutting line especially in changing soil conditions of different strength and hardness, whereby uneven forces and moments are introduced into the tooth
  • the change of drill teeth in changing applications or wear takes place by knocking out the drill tooth from the holder, for which purpose a hole must be provided in the holder in order to reach the back of the shank of the drill tooth.
  • a drill holder with a rear discharge bore is known for example from GB-A-1 204 194 and known from DE-U-296 12 342.
  • DE-U-296 12 342 the tooth holder is used to hold drill teeth with konusartigem tooth part, the punctiform tooth blade is located exactly on a shaft center line of the drill tooth.
  • US-A-5,143,163, US-A-4,917,196 and US-A-4,595,241 show boring teeth each having a tooth portion and a shank for releasably securing in a mounting of a drilling device.
  • the tooth parts of these known drill teeth each have a tooth cutting edge whose tooth cutting plane extends at an angle of attack to the respective shaft centerline. According to US-A-5,143,163, this angle of attack can be very small and in particular go to zero.
  • the drill teeth known from US Pat. Nos. 5,143,163 and 4,917,196 have holding openings in the shank which, according to US Pat. No. 4,917,196, serve for fixing the drill tooth in the drill tooth holder.
  • Another drill tooth with a rear holding opening is known from US-A-4, 083,605.
  • the invention has for its object to provide a drill of the type mentioned, which is particularly easy to detach from its holder.
  • the tooth part has a through hole for pulling out the tooth from the holder.
  • the pressure angle of the drill tooth can be adjusted and adjusted in a targeted manner depending on the respective soil conditions by changing the use of different drill teeth. So can different teeth with z. B. two or three different angles of attack can be used, which are fixed in the brackets of the drilling tool.
  • a drill bit 1 of a rotary drilling tool has a front tooth part 2 and a rear shaft 3 (see FIG. 1), which is cylindrical and is provided for receiving in a bore 4 of a holder 5 (FIG. 2) of the rotary drilling tool.
  • a transition section 6 between the shaft 3 and the substantially wedge-shaped tooth part 2 has a rectangular in cross section to a center line 7 of the shaft 3 rectangular shape.
  • Two opposing shoulders 8, 9 on the support 5 see Figs.
  • the tooth part 2 is attached to the transition section 6 relative to the shaft center line 7 pivoted, so that a tooth cutting plane 11 of the tooth part 2 (see Fig. 1), which forms the plane of symmetry of the tooth part 2 and in which the tooth cutting edge 12 extends to an angle of, for example. 5 ° is pivoted.
  • the point of intersection of the tooth cutting plane 11 with the shaft center line 7 lies approximately at the transition section 6.
  • the tooth cutting edge 12 may lie in a conventional manner on a straight line and be formed of a continuous toothed element or of a plurality of adjacent toothed elements with interruptions.
  • the one or more tooth elements is or are in particular made of hard metal.
  • Fig. 4 an alternative design of the tooth part 2 is shown, in which the tooth cutting edge 12, which is formed of, for example, five identical carbide tooth pins 13, 13 ', 13' ', lies on a curved line in the tooth cutting plane 11, so that the outer tooth pins 13 '' with respect to the inner tooth pins 13, 13 'are reset.
  • Each tooth pin 13, 13 ', 13' ' is inserted and fixed in a recess 14 on the corresponding curved front edge 15 of the tooth part 2.
  • the center lines 16, 16 ', 16' 'of the tooth pins 13, 13', 13 '' thus intersect the center line 17 of the tooth part 2, wherein, depending on the size of the curvature of the tooth cutting edge 12, the intersections within the tooth part 2 or on an extension of Center line 17 are outside of the tooth part 2. If the curvature of the tooth cutting edge 2 is a circular arc, then the center lines 16, 16 ', 16' 'of the tooth pins 13, 13', 13 '' intersect at a point on the center line 17.
  • the two outer tooth pins 13 '' can be arranged and fixed on the tooth part 2 such that their cutting edges project beyond the side edges 18 of the tooth part 2, so that lateral wear of the tooth part 2 is reduced.
  • a transverse bore or passage opening 19 is formed centrally in the tooth part 2.
  • the drill tooth 1 can be pulled from its receiving position in the holder 5, wherein a substantially axial release force is applied.
  • the drill tooth 1 is releasably held in a known manner, for example by means of clamping bush in the holder 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)

Claims (11)

  1. Dent de forage pour le travail des sols, avec une partie formant dent (2) et une tige (3) servant à la fixation amovible dans un support (5) d'un dispositif de forage, un tranchant (12) de dent de la partie formant dent (2) étant situé en dehors d'une ligne médiane (7) de la tige et un plan de coupe (11) de la dent s'étendant selon un angle d'attaque (α) par rapport à la ligne médiane (7) de la tige,
        caractérisée en ce que la partie formant dent (2) présente un passage (19) permettant d'extraire la dent de forage du support (5).
  2. Dent de forage selon la revendication 1, caractérisée en ce que le support (5) présente un dispositif de positionnement (10) pour recevoir de manière orientée la dent de forage (1) dans deux positions de travail définies différentes, qui sont décalées de 180° autour de la ligne médiane (7) de la tige.
  3. Dent de forage selon la revendication 1 ou 2, caractérisée en ce que le plan de coupe (11) de la dent coupe la ligne médiane (7) de la tige approximativement dans une zone de btransition (6) entre la partie formant dent (2) et la tige (3).
  4. Dent de forage selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'angle d'attaque (α) est compris dans une plage d'environ 2 à 15°.
  5. Dent de forage selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le tranchant de dent (12) est formé de plusieurs ergots de dent (13, 13', 13") voisins, qui sont rapportés à l'extrémité antérieure de la partie formant dent (2).
  6. Dent de forage selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le tranchant (12) de dent présente un bord antérieur courbe dans le plan de coupe (11) de la dent.
  7. Dent de forage selon la revendication 5 ou 6, caractérisée en ce que les lignes médianes (16, 16', 16") des différents ergots (13, 13', 13") de dent coupent la ligne médiane (17) de la partie formant dent (2).
  8. Dent de forage selon la revendication 7, caractérisée en ce que les lignes médianes (16, 16', 16") des différents ergots (13, 13', 13 ") de dent se coupent en un point de la ligne médiane (17) de la partie formant dent (2).
  9. Dent de forage selon l'une quelconque des revendications 5 à 8, caractérisée en ce que les tranchants des deux ergots de dent extérieurs (13") dépassent des faces opposées (18) de la partie formant dent (2).
  10. Dent de forage selon l'une quelconque des revendications 5 à 9, caractérisée en ce que la partie formant dent (12) est sensiblement cunéiforme.
  11. Dent de forage selon l'une quelconque des revendications 1 à 10, caractérisée en ce que la tige (3) de la partie formant dent (2) est cylindrique ou conique.
EP00110438A 1999-07-12 2000-05-16 Dent de forage Expired - Lifetime EP1069278B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19932440A DE19932440C2 (de) 1999-07-12 1999-07-12 Bohrzahn zur Erdbearbeitung
DE19932440 1999-07-12

Publications (2)

Publication Number Publication Date
EP1069278A1 EP1069278A1 (fr) 2001-01-17
EP1069278B1 true EP1069278B1 (fr) 2004-12-29

Family

ID=7914436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00110438A Expired - Lifetime EP1069278B1 (fr) 1999-07-12 2000-05-16 Dent de forage

Country Status (2)

Country Link
EP (1) EP1069278B1 (fr)
DE (2) DE19932440C2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6828305B2 (en) 2001-06-04 2004-12-07 Nobex Corporation Mixtures of growth hormone drug-oligomer conjugates comprising polyalkylene glycol, uses thereof, and methods of making same
DE202009017627U1 (de) 2009-12-23 2010-09-23 Gawlak, Matthias Einrichtung zum Abziehen von verschlissenen Bohrzähnen oder Rundschaftmeißeln an Bohrschnecken bzw. -eimern
US9828742B2 (en) * 2014-01-31 2017-11-28 Leroy G. Hagenbuch Cutter assembly with freewheeling cutting elements
EP2963237A1 (fr) * 2014-07-03 2016-01-06 Sandvik Intellectual Property AB Ensemble de retenue de trépan de coupe à angle variable
CN115949345A (zh) * 2022-12-20 2023-04-11 西南石油大学 一种具有微型流道钻齿的钻头

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705128A (en) * 1950-03-15 1955-03-29 Austin Powder Co Auger head
US3426860A (en) * 1966-12-27 1969-02-11 Gerald A Petersen Pilot bit with replaceable teeth
US4083605A (en) * 1976-06-22 1978-04-11 Kennametal Inc. Ripper tooth
US4595241A (en) * 1984-04-16 1986-06-17 Gilbert Jerry F Digging tooth and holder therefor
US4917196A (en) * 1989-08-15 1990-04-17 Kennametal Inc. Excavating tooth for an earth auger
US5143163A (en) * 1991-08-29 1992-09-01 Kennametal Inc. Digging tooth

Also Published As

Publication number Publication date
DE19932440A1 (de) 2001-01-25
DE50009078D1 (de) 2005-02-03
EP1069278A1 (fr) 2001-01-17
DE19932440C2 (de) 2003-04-10

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