EP0569985B1 - Outil tournant avec inserts en métal dur - Google Patents

Outil tournant avec inserts en métal dur Download PDF

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Publication number
EP0569985B1
EP0569985B1 EP93107808A EP93107808A EP0569985B1 EP 0569985 B1 EP0569985 B1 EP 0569985B1 EP 93107808 A EP93107808 A EP 93107808A EP 93107808 A EP93107808 A EP 93107808A EP 0569985 B1 EP0569985 B1 EP 0569985B1
Authority
EP
European Patent Office
Prior art keywords
rotary tool
tool according
pins
rotation
axis
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
EP93107808A
Other languages
German (de)
English (en)
Other versions
EP0569985A1 (fr
Inventor
Rainer Töpfer
Fritz Flessner
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.)
SOBRA-HARTMETALLE PETER SOLTERBECK & PARTNER
Original Assignee
Sobra-Hartmetalle Peter Solterbeck & Partner
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 Sobra-Hartmetalle Peter Solterbeck & Partner filed Critical Sobra-Hartmetalle Peter Solterbeck & Partner
Publication of EP0569985A1 publication Critical patent/EP0569985A1/fr
Application granted granted Critical
Publication of EP0569985B1 publication Critical patent/EP0569985B1/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
    • E21B10/56—Button-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
    • E21B10/46—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
    • E21B10/485—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type with inserts in form of chisels, blades or the like
    • 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

Definitions

  • the invention relates to a rotary tool, in particular a drilling tool, with a front end face in the feed direction and with hard metal inserts protruding in the feed direction over the front end face, which are releasably embedded in a part of the rotary tool body which forms the front end face.
  • Such rotary tools are known, for example, as drill bits from US Pat. No. 4,782,902. They contain hard metal inserts which serve as cutting elements. These carbide inserts are firmly connected to the rotary tool body in the manufacture of these rotary tools by means of lock nuts which engage in threads on the hard metal inserts within the front rotary tool body.
  • the object of the invention is to provide a rotary tool of the type mentioned in the introduction, in which the replacement of worn carbide inserts can be carried out simply, easily, inexpensively and by any operator.
  • the carbide inserts are designed as pins with one working tip. If the pins are given a conical shape tapering from the working tip, they can be inserted into openings with a corresponding, conical shape in the front end face of the rotary tool, whereby a firm but nevertheless detachable connection with the rotary tool body can be obtained. If the conical openings are made continuously from the front end surface, which represents the work area, to the rear end surface, the recessed and fixed pins can be driven out from the rear end surface in the direction of the front end surface without great effort and can be removed from the opening on the front end surface. For example, the pins can be driven out with a mandrel and a hammer without the need for special tools.
  • the pins are arranged on circles concentric to the axis of rotation in planes perpendicular to the axis of rotation, pins arranged symmetrically to the axis of rotation each lying on a concentric circle.
  • several clearing circles are created which enlarge the clearing area and whose radial distance from one another is less than the maximum diameter of the pins, as a result of which a larger number of pins can act in the clearing surface. This can also be achieved by spiraling the pins.
  • a central and continuous opening in the rotary tool body which is symmetrical about the axis of rotation provides a connection possibility to a drive linkage and furthermore enables, for example, the insertion of a center drill to support a rotary tool used as a drill bit.
  • Dividing the rotary tool body in two along a cutting plane perpendicular to the axis of rotation into a first half with a front end face and a second half with a rear end face and with connecting faces on which the two halves can lie against one another in the assembled state and can be screwed together further facilitates the replacement of the hard metal inserts, since it is sufficient instead of detaching the entire rotary tool body from a drive linkage, removing the first half of the rotary tool body and replacing the hard metal inserts located therein.
  • a rotary tool with a convex end face is typically used as a drill bit.
  • a rotary tool which can be used as a ring drill.
  • a circle of pins is arranged symmetrically about the axis of rotation on the front face.
  • the openings for receiving the pins are only continuous in the first half of the rotary tool body, the ends of the openings facing away from the front end face are protected from the ingress of foreign bodies by the attached second half, which means that unhindered access to the halves immediately after the halves have been released the carbide inserts carrying openings is possible, which significantly facilitates the replacement process.
  • radial elevations are arranged on one of the connecting surfaces, which protrude into corresponding recesses in the other Grab the connecting surface.
  • a circularly symmetrical elevation around the central opening on one of the connecting surfaces engages in a corresponding recess in the other connecting surface, as a result of which exact centering with the axis of rotation is achieved when the two halves are put together.
  • Rotation tools e.g. B. are used as drill bits, pins made of boron nitride and the openings for the insertion of the pins are arranged parallel to the axis of rotation.
  • Figure 1 shows a partially sectioned and perspective view of a first embodiment of a rotary tool.
  • a first half 31 of a rotary tool body 15 contains openings 13 for receiving hard metal inserts 12, which are inserted in such a way that they protrude from a front end face 11. These openings 13 extend continuously from the front end surface 11 to a connecting surface 34 of the first half 31 with a second half 32. Starting from the front end surface 11 in the direction of the connecting surface 34, the openings 13 have a conically tapering shape.
  • the carbide inserts 12 have a corresponding conical tapering shape, so that a non-positive connection is made possible. This is shown enlarged and in a sectional view in FIG. 2.
  • the hard metal insert 12 slides into the opening 13 until a frictional force fit of the hard metal insert 12 is achieved due to the conical shape. If the hard metal insert 12 is seated firmly in the opening 13, a working tip 14 projects beyond the front end face 11.
  • a pin-like object with a correspondingly small diameter can reach into the openings 13 from the connecting surface 34 and the hard metal inserts 12 can be knocked out in the feed direction, for example by means of a hammer.
  • the second half 32 of the rotary tool body 15 is designed such that it attaches to the first half 31 in a form-fitting manner.
  • a circularly symmetrical elevation 50 which is arranged on one of the two halves 31 or 32, is used by a central opening 20 present in the rotary tool body 15, which elevation 50 in a corresponding recess 51 on the other of the two halves 32 or 31 engages.
  • radial elevations 40 are arranged in the second half, which in turn engage in corresponding recesses 41 in the first half 31.
  • this arrangement can also be implemented in reverse.
  • Screws 21, which engage through openings 22 in the second half 32 in threaded bores 23 in the first half, are used to fasten the two halves 31 and 32 together.
  • Figure 3 shows a perspective view of a second embodiment of a rotary tool according to the invention.
  • the central opening 120 is expanded so far that the front end face 111 consists only of a narrow ring.
  • the openings 113 with the hard metal inserts 112 are arranged in a circle symmetrically about the axis of rotation 116. Thus, cylindrical segments can be drilled out without the need for expensive hard metal inserts 112 over the entire cross section of the drilling opening.
  • four radial elevations 140 in the second half 132 which engage in corresponding recesses 141 in the first half 131, transmit the torque from the second half 132 to the first half 131 of the rotary tool body 115.
  • a circularly symmetrical elevation as in FIG. 1 (reference number 50) with a corresponding recess (reference number 51 in FIG. 1) can also be applied to this exemplary embodiment for precise centering when the two halves 131 and 132 are assembled with respect to the axis of rotation 116.
  • screws can be used which engage through openings in one of the two halves 131 and 132 in corresponding threaded bores in the corresponding other half.
  • the rotary tool as described above by way of example in possible embodiments, is distinguished by a very simple handling in relation to the replacement of worn carbide inserts. Neither expensive special tools nor specially trained personnel are required for this.

Landscapes

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

Claims (16)

  1. Outil rotatif, notamment outil de perçage, avec une surface avant (11 ; 111) dans le sens d'avance et avec des inserts en métal dur (12 ; 112) qui dépassent dans le sens d'avance de la surface avant (11 ; 111) et qui sont encastrés amovibles dans la partie du corps d'outil rotatif (15 ; 115) qui forme la surface avant (11 ; 111),
       caractérisé en ce que les inserts en métal dur sont des broches (12 ; 112) sans filetage avec une pointe d'attaque (14 ; 114) et présentent une forme conique continue qui se rétrécit à partir de la pointe d'attaque (14 ; 114), et les trous (13 ; 113) dans la surface avant (11 ; 111) sont construits de manière correspondante pour loger les broches (12 ; 112) et un ajustement serré, solide mais malgré tout amovible à tout instant, avec le corps d'outil rotatif peut être obtenu ainsi, la surface conique de broche ayant une structure lisse et le montage sur le corps d'outil rotatif s'effectuant par assemblage serré.
  2. Outil rotatif selon la revendication 1,
       caractérisé en ce que les trous (13 ; 113) sont construits à partir de la surface avant (11 ; 111) et traversent le corps d'outil rotatif (15 ; 115).
  3. Outil rotatif selon la revendication 1 ou 2,
       caractérisé en ce que les broches (12 ; 112) sont agencées sur des cercles concentriques par rapport à l'axe de rotation (16) et dans des plans perpendiculaires à l'axe de rotation (16 ; 116).
  4. Outil rotatif selon l'une des revendications 1 à 3,
       caractérisé en ce que des broches (12 ; 112) agencées symétriquement par rapport à l'axe de rotation (16 ; 116) se trouvent à chaque fois sur un cercle concentrique.
  5. Outil rotatif selon la revendication 1 ou 2,
       caractérisé en ce que les broches (12 ; 112) sont agencées en spirale.
  6. Outil rotatif selon l'une des revendications 1 à 5,
       caractérisé en ce que le corps d'outil rotatif (15 ; 115) comporte un trou (20 ; 120) symétrique autour de l'axe de rotation (16 ; 116), centré et traversant.
  7. Outil rotatif selon l'une des revendications 1 à 6,
       caractérisé en ce que le corps d'outil rotatif (15 ; 115) est construit en deux parties par un plan de coupe perpendiculaire à l'axe de rotation (16 ; 116), c'est-à-dire en une première moitié (31 ; 131) avec la surface avant (11 ; 111) et une seconde moitié (32 ; 132) avec une surface arrière (33) et avec des surfaces d'assemblage (34, 35 ; 134, 135) auxquelles les deux moitiés (31, 32 ; 131, 132) sont adjacentes dans l'état assemblé.
  8. Outil rotatif selon l'une des revendications 1 à 7,
       caractérisé en ce que la surface avant (11 ; 111) est convexe.
  9. Outil rotatif selon la revendication 6 ou 7,
       caractérisé en ce que la section des trous centrés (20 ; 120) prend la plus grande partie de la surface de section du corps d'outil rotatif (15 ; 115).
  10. Outil rotatif selon la revendication 9,
       caractérisé en ce que les broches (12 ; 112) sont agencées sur un cercle autour de l'axe de rotation (16 ; 116).
  11. Outil rotatif selon l'une des revendications 7 à 10,
       caractérisé en ce que les trous (13 ; 113) sont construits de manière à traverser seulement la première moitié (31 ; 131) du corps d'outil rotatif (15 ; 115).
  12. Outil rotatif selon l'une des revendications 7 à 11,
       caractérisé en ce que des bosses radiales (40 ; 140) sont agencées sur une des surfaces d'assemblage (34, 35 ; 134, 135) des deux moitiés (31, 32 ; 131, 132), lesquelles bosses pénètrent dans des creux correspondants (41 ; 141) dans la surface d'assemblage de l'autre moitié (32 ; 132) ou (31 ; 131).
  13. Outil rotatif selon l'une des revendications 7 à 12,
       caractérisé en ce qu'une bosse symétrique en cercle (50) est agencée sur une des surfaces d'assemblage (34, 35 ; 134, 135) des deux moitiés (31, 32 ; 131, 132) autour du trou centré (20 ; 120), laquelle bosse pénètre dans un creux correspondant (51) sur la surface d'assemblage de l'autre moitié (32 ; 132) ou (31 ; 131).
  14. Outil rotatif selon l'une des revendications 7 à 13,
       caractérisé en ce que les moitiés (31, 32 ; 131, 132) du corps d'outil rotatif (15 ; 115) sont assemblées de manière solide et amovible au moyen de vis (21).
  15. Outil rotatif selon l'une des revendications 1 à 14,
       caractérisé en ce que les broches (12 ; 112) sont en nitrure de bore.
  16. Outil rotatif selon l'une des revendications 1 à 15,
       caractérisé en ce que les trous (13 ; 113) sont agencés parallèlement à l'axe de rotation (16 ; 116).
EP93107808A 1992-05-15 1993-05-13 Outil tournant avec inserts en métal dur Expired - Lifetime EP0569985B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9206657U 1992-05-15
DE9206657U DE9206657U1 (de) 1992-05-15 1992-05-15 Rotationswerkzeug mit Hartmetalleinsätzen

Publications (2)

Publication Number Publication Date
EP0569985A1 EP0569985A1 (fr) 1993-11-18
EP0569985B1 true EP0569985B1 (fr) 1997-08-06

Family

ID=6879583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107808A Expired - Lifetime EP0569985B1 (fr) 1992-05-15 1993-05-13 Outil tournant avec inserts en métal dur

Country Status (3)

Country Link
EP (1) EP0569985B1 (fr)
AT (1) ATE156400T1 (fr)
DE (2) DE9206657U1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10013738A1 (de) * 2000-03-20 2001-10-11 Tigra Hartstoff Gmbh Zylinderbohrer mit Hartmetallschneiden
DE10136094A1 (de) * 2001-07-26 2003-02-20 Tracto Technik Bohrwerkzeug
DE10161823A1 (de) * 2001-12-15 2003-06-26 Tigra Hartstoff Gmbh Zylinderkopfbohrer oder ähnliches Werkzeug mit Hartmetallschneiden

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1806079A (en) * 1923-11-05 1931-05-19 Sullivan Machinery Co Core drill
US2145466A (en) * 1937-05-25 1939-01-31 Bertis H Urschel Rock drill
US2460673A (en) * 1944-06-09 1949-02-01 Irvine J Berscheid Detachable bit
DE7402881U (de) * 1974-01-29 1976-07-08 Fried. Krupp Huettenwerke Ag, 4630 Bochum Bohrkopf zum kern- oder vollbohren
US4085809A (en) * 1977-01-10 1978-04-25 Robert Lovell Reconditionable drill bit assembly
DE8107768U1 (de) * 1981-03-17 1981-10-01 Firma Winfried Reithmeier, 8130 Starnberg Bohrkrone zum Bohren in Mauerwerk o.dgl.
DE8219045U1 (de) * 1982-07-03 1983-01-20 Schiess AG, 4000 Düsseldorf Bohrwerkzeug fuer tiefe bohrungen
BR8701601A (pt) * 1986-03-13 1988-01-12 Smith International Cortadores giratorios para brocas de rocha
DE3637456A1 (de) * 1986-06-09 1988-05-11 Erich Wezel Hohlbohrkrone
US4782903A (en) * 1987-01-28 1988-11-08 Strange William S Replaceable insert stud for drilling bits
EP0379584A1 (fr) * 1988-05-23 1990-08-01 VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY INSTITUT TRANSPORTNOGO STROITELSTVA(TsNIIS) Instrument pour per age rotatif a percussion
DE3819462C1 (en) * 1988-06-08 1990-05-23 Johannes 4130 Moers De Radtke Drilling head for making small-diameter and large-diameter boreholes
DE3911657A1 (de) * 1989-04-10 1990-10-11 Telefunken Electronic Gmbh Halbleiter-bauelement
DE3941609C1 (en) * 1989-12-16 1991-10-24 Johannes 4130 Moers De Radtke Boring head for mining - has head and shaft provided with fluid flushing channels and tapering surface on head
DE4002907A1 (de) * 1990-02-01 1991-08-08 Leffer Stahl & App Schneidkrone fuer bohrrohre mit einfach auswechselbaren zaehnen
DE4004814A1 (de) * 1990-02-16 1991-08-22 Westa Werkzeugbau Bohrer fuer gestein, beton oder als erdbohrer
DE9002460U1 (de) * 1990-03-02 1990-05-03 Drebo Werkzeugfabrik GmbH, 7963 Altshausen Kronenbohrer
DE9110283U1 (de) * 1991-08-20 1991-10-17 Töpfer, Rainer, 2802 Ottersberg Bohrkrone

Also Published As

Publication number Publication date
DE59307048D1 (de) 1997-09-11
DE9206657U1 (de) 1993-09-16
ATE156400T1 (de) 1997-08-15
EP0569985A1 (fr) 1993-11-18

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