EP0378964B1 - Trepanning tool - Google Patents

Trepanning tool Download PDF

Info

Publication number
EP0378964B1
EP0378964B1 EP89810661A EP89810661A EP0378964B1 EP 0378964 B1 EP0378964 B1 EP 0378964B1 EP 89810661 A EP89810661 A EP 89810661A EP 89810661 A EP89810661 A EP 89810661A EP 0378964 B1 EP0378964 B1 EP 0378964B1
Authority
EP
European Patent Office
Prior art keywords
guide body
guide
cutting body
segments
cutting
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
EP89810661A
Other languages
German (de)
French (fr)
Other versions
EP0378964A2 (en
EP0378964A3 (en
Inventor
Josef Obermeier
Ernst Wohlwend
Eugen Dr. Magyari
Horst-Detlef Gassmann
Walter Ritt
Peter Cavada
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 AT89810661T priority Critical patent/ATE91933T1/en
Publication of EP0378964A2 publication Critical patent/EP0378964A2/en
Publication of EP0378964A3 publication Critical patent/EP0378964A3/en
Application granted granted Critical
Publication of EP0378964B1 publication Critical patent/EP0378964B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D99/00—Subject matter not provided for in other groups of this subclass
    • 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/78—Tool of specific diverse material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/81—Tool having crystalline cutting edge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/895—Having axial, core-receiving central portion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/896—Having product-receiving chamber

Definitions

  • the invention relates to a hollow drilling tool with a tubular carrier part, with a cutting body arranged at the front end thereof, and with a guide body that has a higher wear resistance than the carrier part, which corresponds at least along part of the circumference of the outer contour of the cutting body and in its axial extent is equal to or larger than that Cutting body is.
  • Hollow boring tools are mainly used for drilling larger diameter bores.
  • a hollow drilling tool is known for example from GB-PS 935 030.
  • the ring-shaped cutting body is connected to the carrier part.
  • the radial guidance of this hollow drilling tool takes place exclusively via the cutting body.
  • the guide length becomes shorter. If the guide length is too small, an exact borehole geometry can no longer be guaranteed.
  • a hollow drilling tool which has a kind of stabilizer after the cutting body, the stabilizer being clamped directly between the matrix of the cutting body and sleeves.
  • the stabilizer is supported directly on the matrix of the cutting body by means of threaded rings in the form of two nuts.
  • the offset design creates a very complex and complicated tool that also requires a coupling between the cutting body and the guide part that is not easy to manufacture. There is also a risk that the resulting pressure forces will loosen, deform or destroy the matrix.
  • the invention has for its object to provide a hollow drilling tool that allows both a full utilization of the cutting body and adherence to a precise drill hole geometry, and is simple, economical and rational to manufacture.
  • this is achieved in that the front end of the guide body is connected to the rear end of the cutting body and the rear end of the guide body is connected to the front end of the carrier part and the carrier part is connected to the guide body by welding or soldering and the guide elements to the cutting body is connected by sintering, soldering or welding
  • the two functions "cutting” and “guiding” are separated from one another by the arrangement of a guide body. Since the outer contour of the guide body at least along one Part of the circumference corresponds to the outer contour of the cutting body, the guide body is guided in the bore previously made by the cutting bodies. Since the guide body has a higher wear resistance than the carrier part, premature wear of the guide body is prevented.
  • the fact that the carrier part is connected to the guide body by soldering or welding and the guide body is connected to the cutting body by sintering, soldering or welding not only ensures simple and safe power support, but also economical and rational production.
  • Guide elements arranged on the guide body are expediently designed as segments. Segments each extend over part of the circumference. If the circumferential extent of the segments is sufficiently small and the outside diameter of the hollow drilling tool is sufficiently large, the segments can also be designed as flat strips that extend in the axial direction.
  • At least three guide elements which are distributed along the circumference and are designed as segments, are preferably provided.
  • the central position of the hollow drilling tool in a hole is determined using three segments. However, more than three, for example four or six, segments can also be provided for a favorable distribution of the lateral forces.
  • the guide elements which are designed as segments, are expediently arranged next to the cutting body in an extension against the feed direction.
  • the cutting body is thus supported in the axial direction on the segments and these in turn on the carrier part.
  • the segments and the cutting body can each be produced individually and then connected to one another, for example by soldering. Because the cutting body preferably consists of synthetic diamonds embedded in a metal matrix, the cutting body and the segments can also be pre-sintered individually and then sintered together to form a single body.
  • the segments are expediently part of a guide body arranged between the carrier part and the cutting body.
  • the guide body can thus be manufactured separately and then connected at one end to the carrier part and at the other end to the cutting body. This enables an additional rational and economical effect in the production.
  • the guide body can, for example, be provided with grooves running in the axial direction, so that strips serving to guide the hollow drilling tool are produced between the individual grooves. Such grooves also serve for the good removal of the cooling water and the cuttings washed away with it.
  • the guide body can also be pre-sintered and then connected to the cutting body.
  • the guide body advantageously contains wear-resistant hard materials.
  • hard materials are, for example, silicon carbide or the like. These hard materials can be sintered into a matrix material.
  • the hollow drilling tool shown in FIGS. 1 and 2 consists of a tubular carrier part 1, a ring-shaped cutting body 2 and a likewise ring-shaped guide body 3.
  • the carrier part 1 has a front end 1a and a rear end 1b. At the rear end 1b, the carrier part 1 is provided with a connecting piece 1c.
  • the cutting body 2 also has a front end 2a and a rear end 2b.
  • the cutting body 2 is also provided with two diametrically opposed slots 2c extending from the front end 2a. These slots 2c serve for the passage of the cooling water supplied through the carrier part 1 from the inside to the outside of the hollow drilling tool.
  • the guide body 3 has a front end 3a and a rear end 3b.
  • the front end 3a of the guide body 3 is connected to the rear end 2b of the cutting body 2.
  • the guide body 3 is provided along its circumference with grooves 3c running in the axial direction. These grooves 3c serve to discharge the cooling water and the cuttings washed away with it. The webs remaining between the grooves 3c are used for guidance and are designed as guide elements 3d.
  • the rear end 2b of the guide body 3 is connected to the front end 1a of the carrier part 1. This connection of the carrier part 1 to the guide body 3 can take place, for example, by welding or soldering.
  • the connection between the cutting body 2 and the guide body 3 can also be made by welding or soldering. It is also possible to sinter the cutting body 2 and the guide body together.
  • the axial extent 1 of the guide body 3 is a multiple of the axial extent s of the cutting body 2.
  • the hollow drilling tool shown in FIG. 3 consists of a carrier part 11 and a cutting body 12 arranged at its front end 11a and a guide body 13.
  • the guide body 13 is located between the carrier part 11 and the cutting bodies 12 and corresponds in cross section to the cutting body 12.
  • the cutting body 12 and the guide body 13 can be connected to one another by sintering, soldering or welding.
  • the guide body 13 is connected to the carrier part 11 by welding or soldering.
  • the carrier part 11 and the guide body 13 are connected to one another only at the end. Due to the gaps between the guide body 13, the cooling water can circulate from the inside to the outside of the tubular support part 11.
  • the axial extent t of the guide body 13 corresponds approximately to the axial extent s of the cutting body 12. This ensures that the guidance is sufficient until the cutting bodies 12 are completely worn out.

Abstract

The trepanning tool, consisting of a support part (1) and a cutting body (2), has guide segments (3d) following the cutting body (2) towards the support part (1) in the opposite direction to the feed direction. The outer contour of the segments (3d) essentially corresponds to the outer contour of the cutting body (2). The segments (3d) serve to guide the trepanning tool in the bore produced by the cutting body (2). <IMAGE>

Description

Die Erfindung betrifft ein Hohlbohrwerkzeug mit einem rohrförmigen Trägerteil, mit an dessen vorderem Ende angeordneten Schneidkörper, und mit gegenüber dem Trägerteil eine höhere Verschleissfestigkeit aufweisenden Führungskörper, der wenigstens entlang eines Teils des Umfangs der Aussenkontur des Schneidkörpers entspricht und in seiner Axialerstreckung gleich oder grösser als der Schneidkörper ist.The invention relates to a hollow drilling tool with a tubular carrier part, with a cutting body arranged at the front end thereof, and with a guide body that has a higher wear resistance than the carrier part, which corresponds at least along part of the circumference of the outer contour of the cutting body and in its axial extent is equal to or larger than that Cutting body is.

Hohlbohrwerkzeuge werden hauptsächlich zum Herstellen von Bohrungen mit grösserem Durchmesser verwendet. Ein solches Hohlbohrwerkzeug ist beispielsweise aus der GB-PS 935 030 bekannt. Bei diesem Hohlbohrwerkzeug ist der ringförmig ausgebildete Schneidkörper mit dem Trägerteil verbunden. Die radiale Führung dieses Hohlbohrwerkzeuges erfolgt ausschliesslich über den Schneidkörper. Da sich der Schneidkörper mit der Zeit abnutzt, wird die Führungslänge kürzer. Ist die Führungslänge zu klein, ist eine genaue Bohrlochgeometrie nicht mehr gewährleistet.Hollow boring tools are mainly used for drilling larger diameter bores. Such a hollow drilling tool is known for example from GB-PS 935 030. In this hollow drilling tool, the ring-shaped cutting body is connected to the carrier part. The radial guidance of this hollow drilling tool takes place exclusively via the cutting body. As the cutting body wears out over time, the guide length becomes shorter. If the guide length is too small, an exact borehole geometry can no longer be guaranteed.

Aus der DE-B-23 04 271 ist ein Hohlbohrwerkzeug bekannt, das eine Art Stabilisator nach dem Schneidkörper aufweist, wobei der Stabilisator direkt zwischen der Matrix des Schneidkörpers und Muffen verspannt wird. Dabei wird der Stabilisator über Gewinderinge in Form von zwei Muttern direkt auf der Matrix des Schneidkörpers abgestützt. Durch die abgesetzte Bauweise entsteht ein sehr aufwendiges und kompliziert herzustellendes Werkzeug, das zudem eine nicht einfach herstellbare Kupplung zwischen Schneidkörper und Führungsteil notwendig macht. Es besteht auch die Gefahr, dass durch die entstehenden Druckkräfte die Matrix gelöst, verformt oder zerstört wird.From DE-B-23 04 271 a hollow drilling tool is known which has a kind of stabilizer after the cutting body, the stabilizer being clamped directly between the matrix of the cutting body and sleeves. The stabilizer is supported directly on the matrix of the cutting body by means of threaded rings in the form of two nuts. The offset design creates a very complex and complicated tool that also requires a coupling between the cutting body and the guide part that is not easy to manufacture. There is also a risk that the resulting pressure forces will loosen, deform or destroy the matrix.

Der Erfindung liegt die Aufgabe zugrunde, ein Hohlbohrwerkzeug zu schaffen, das sowohl eine vollständige Ausnutzung des Schneidkörpers und Einhaltung einer genauen Bohrlochgeometrie ermöglicht, als auch einfach, wirtschaftlich und rational herstellbar ist.The invention has for its object to provide a hollow drilling tool that allows both a full utilization of the cutting body and adherence to a precise drill hole geometry, and is simple, economical and rational to manufacture.

Gemäss der Erfindung wird dies dadurch erreicht, dass das vordere Ende des Führungskörpers mit dem rückwärtigen Ende des Schneidkörpers und das rückwärtige Ende des Führungskörpers mit dem vorderen Ende des Trägerteils verbunden ist und das Trägerteil mit dem Führungskörper durch Schweissen oder Löten und die Führungselemente mit dem Schneidkörper durch Sintern, Löten oder Schweissen verbunden istAccording to the invention, this is achieved in that the front end of the guide body is connected to the rear end of the cutting body and the rear end of the guide body is connected to the front end of the carrier part and the carrier part is connected to the guide body by welding or soldering and the guide elements to the cutting body is connected by sintering, soldering or welding

Durch die Anordnung eines Führungskörpers werden die beiden Funktionen "Schneiden" und "Führen" voneinander getrennt. Da die Aussenkontur des Führungskörpers wenigstens entlang eines Teils des Umfanges der Aussenkontur des Schneidkörpers entspricht, wird der Führungskörper in der zuvor von den Schneidkörpern erstellten Bohrung geführt. Da der Führungskörper gegenüber dem Trägerteil eine höhere Verschleissfestigkeit aufweist, wird eine vorzeitige Abnützung des Führungskörpers verhindert. Dadurch dass das Trägerteil mit den Führungskörper durch Löten oder Schweissen verbunden ist und der Führungskörper mit dem Schneidkörper durch Sintern, Löten oder Schweissen verbunden ist, wird nicht nur eine einfache und sichere Kraftabstützung, sondern auch eine wirtschaftliche und rationelle Herstellung gewährleistet.The two functions "cutting" and "guiding" are separated from one another by the arrangement of a guide body. Since the outer contour of the guide body at least along one Part of the circumference corresponds to the outer contour of the cutting body, the guide body is guided in the bore previously made by the cutting bodies. Since the guide body has a higher wear resistance than the carrier part, premature wear of the guide body is prevented. The fact that the carrier part is connected to the guide body by soldering or welding and the guide body is connected to the cutting body by sintering, soldering or welding not only ensures simple and safe power support, but also economical and rational production.

Auf dem Führungskörper angeordnete Führungselemente sind zweckmässig als Segmente ausgebildet. Segmente erstrecken sich jeweils über einen Teil des Umfanges. Ist die Umfangserstreckung der Segmente genügend klein und der Aussendurchmesser des Hohlbohrwerkzeuges genügend gross, so können die Segmente auch als sich in axialer Richtung erstreckende, ebene Leisten ausgebildet werden.Guide elements arranged on the guide body are expediently designed as segments. Segments each extend over part of the circumference. If the circumferential extent of the segments is sufficiently small and the outside diameter of the hollow drilling tool is sufficiently large, the segments can also be designed as flat strips that extend in the axial direction.

Vorzugsweise sind wenigstens drei, entlang dem Umfang verteilte als Segmente ausgebildete Führungselemente vorgesehen. Mittels dreier Segmente wird die zentrische Lage des Hohlbohrwerkzeuges in einer Bohrung bestimmt. Für eine günstige Verteilung der seitlichen Kräfte können jedoch auch mehr als drei, beispielsweise vier oder sechs Segmente vorgesehen werden.At least three guide elements, which are distributed along the circumference and are designed as segments, are preferably provided. The central position of the hollow drilling tool in a hole is determined using three segments. However, more than three, for example four or six, segments can also be provided for a favorable distribution of the lateral forces.

Die als Segmente ausgebildeten Führungselemente sind zweckmässigerweise entgegen der Vorschubrichtung in Verlängerung anschliessend an den Schneidkörper angeordnet. Der Schneidkörper stützt sich somit in axialer Richtung an den Segmenten und diese wiederum am Trägerteil ab. Die Segmente und der Schneidkörper können je einzeln hergestellt und anschliessend beispielsweise durch Verlöten miteinander verbunden werden. Da der Schneidkörper vorzugsweise aus in eine Metallmatrix eingebetteten synthetischen Diamanten besteht, können der Schneidkörper und die Segmente auch einzeln vorgesintert und anschliessend zu einem einzigen Körper zusammengesintert werden.The guide elements, which are designed as segments, are expediently arranged next to the cutting body in an extension against the feed direction. The cutting body is thus supported in the axial direction on the segments and these in turn on the carrier part. The segments and the cutting body can each be produced individually and then connected to one another, for example by soldering. Because the cutting body preferably consists of synthetic diamonds embedded in a metal matrix, the cutting body and the segments can also be pre-sintered individually and then sintered together to form a single body.

Die Segmente sind zweckmässigerweise Teil eines zwischen dem Trägerteil und dem Schneidkörper angeordneten Führungskörpers. Der Führungskörper kann somit separat hergestellt und anschliessend am einen Ende mit dem Trägerteil und am anderen Ende mit dem Schneidkörper verbunden werden. Dies ermöglicht einen zusätzlichen rationellen und wirtschaftlichen Effekt in der Herstellung. Das Führungskörper kann beispielsweise mit in axialer Richtung verlaufenden Nuten versehen werden, so dass zwischen den einzelnen Nuten der Führung des Hohlbohrwerkzeuges dienende Leisten entstehen. Solche Nuten dienen auch der guten Abfuhr des Kühlwassers und des damit weggespülten Bohrkleins. Der Führungskörper kann jedoch auch vorgesintert und anschliessend mit der Schneidkörper verbunden werden.The segments are expediently part of a guide body arranged between the carrier part and the cutting body. The guide body can thus be manufactured separately and then connected at one end to the carrier part and at the other end to the cutting body. This enables an additional rational and economical effect in the production. The guide body can, for example, be provided with grooves running in the axial direction, so that strips serving to guide the hollow drilling tool are produced between the individual grooves. Such grooves also serve for the good removal of the cooling water and the cuttings washed away with it. However, the guide body can also be pre-sintered and then connected to the cutting body.

Der Führungskörper enthält vorteilhaft verschleissfeste Hartstoffe. Solche Hartstoffe sind beispielsweise Siliziumcarbid oder dergleichen. Diese Hartstoffe können in ein Matrixmaterial eingesintert werden.The guide body advantageously contains wear-resistant hard materials. Such hard materials are, for example, silicon carbide or the like. These hard materials can be sintered into a matrix material.

Die Erfindung soll nachstehend, anhand der anliegenden Zeichnungen, näher erläutert werden. Es zeigen:

Fig. 1
ein erfindungsgemässes Hohlbohrwerkzeug, perspektivisch;
Fig. 2
das Hohlbohrwerkzeug gemäss Fig. 1, teilweise im Schnitt dargestellt;
Fig. 3
einen Teil eines weiteren erfindungsgemässen Hohlbohrwerkzeuges in Ansicht;
The invention will be explained in more detail below with reference to the accompanying drawings. Show it:
Fig. 1
a hollow drilling tool according to the invention, in perspective;
Fig. 2
the hollow drilling tool of Figure 1, partially shown in section.
Fig. 3
a part of a further hollow drilling tool according to the invention in view;

Das aus Fig. 1 und 2 ersichtliche Hohlbohrwerkzeug besteht aus einem rohrförmigen Trägerteil 1, einem ringförmig ausgebildeten Schneidkörper 2 und einem ebenfalls ringförmig ausgebildeten Führungskörper 3. Das Trägerteil 1 weist ein vorderes Ende 1a und ein rückwärtiges Ende 1b auf. Am rückwärtigen Ende 1b ist das Trägerteil 1 mit einem Anschlussstutzen 1c versehen. Der Schneidkörper 2 weist ebenfalls ein vorderes Ende 2a und rückwärtiges Ende 2b auf. Der Schneidkörper 2 ist ausserdem mit zwei einander diametral gegenüberliegend angeordneten, vom vorderen Ende 2a ausgehenden Schlitzen 2c versehen. Diese Schlitze 2c dienen dem Durchtritt des durch das Trägerteil 1 zugeführten Kühlwassers von der Innenseite zur Aussenseite des Hohlbohrwerkzeuges. Der Führungskörper 3 weist ein vorderes Ende 3a und ein rückwärtiges Ende 3b auf. Das vordere Ende 3a des Führungskörpers 3 ist mit dem rückwärtigen Ende 2b des Schneidkörpers 2 verbunden. Der Führungskörper 3 ist entlang seines Umfanges mit in axialer Richtung verlaufenden Nuten 3c versehen. Diese Nuten 3c dienen der Abfuhr des Kühlwassers und des damit weggespülten Bohrkleins. Die zwischen den Nuten 3c verbleibenden Stege dienen der Führung und sind als Führungselemente 3d ausgebildet. Das rückwärtige Ende 2b des Führungskörpers 3 ist mit dem vorderen Ende 1a des Trägerteils 1 verbunden. Dieses Verbinden des Trägerteils 1 mit dem Führungskörpers 3 kann beispielsweise durch Schweissen oder Löten erfolgen. Die Verbindung zwischen dem Schneidkörper 2 und dem Führungskörper 3 kann ebenfalls durch Schweissen oder Löten erfolgen. Ausserdem ist es möglich, den Schneidkörper 2 und den Führungskörper zusammenzusintern. Die axiale Erstreckung 1 des Führungskörpers 3 beträgt ein Mehrfaches der axialen Erstreckung s des Schneidkörpers 2.The hollow drilling tool shown in FIGS. 1 and 2 consists of a tubular carrier part 1, a ring-shaped cutting body 2 and a likewise ring-shaped guide body 3. The carrier part 1 has a front end 1a and a rear end 1b. At the rear end 1b, the carrier part 1 is provided with a connecting piece 1c. The cutting body 2 also has a front end 2a and a rear end 2b. The cutting body 2 is also provided with two diametrically opposed slots 2c extending from the front end 2a. These slots 2c serve for the passage of the cooling water supplied through the carrier part 1 from the inside to the outside of the hollow drilling tool. The guide body 3 has a front end 3a and a rear end 3b. The front end 3a of the guide body 3 is connected to the rear end 2b of the cutting body 2. The guide body 3 is provided along its circumference with grooves 3c running in the axial direction. These grooves 3c serve to discharge the cooling water and the cuttings washed away with it. The webs remaining between the grooves 3c are used for guidance and are designed as guide elements 3d. The rear end 2b of the guide body 3 is connected to the front end 1a of the carrier part 1. This connection of the carrier part 1 to the guide body 3 can take place, for example, by welding or soldering. The connection between the cutting body 2 and the guide body 3 can also be made by welding or soldering. It is also possible to sinter the cutting body 2 and the guide body together. The axial extent 1 of the guide body 3 is a multiple of the axial extent s of the cutting body 2.

Das aus Fig. 3 ersichtliche Hohlbohrwerkzeug besteht aus einem Trägerteil 11 und einem an dessen vorderem Ende 11a angeordneten Schneidkörper 12 sowie einem Führungskörper 13. Der Führungskörper 13 befindet sich zwischen dem Trägerteil 11 und dem Schneidkörpern 12 und entspricht im Querschnitt dem Schneidkörper 12. Der Schneidkörper 12 und der Führungskörper 13 können durch Sintern, Löten oder Schweissen miteinander verbunden werden. Der Führungskörper 13 ist durch Schweissen oder Löten mit dem Trägerteil 11 verbunden. Das Trägerteil 11 und der Führungskörper 13 sind nur stirnseitig miteinander verbunden. Durch die Lücken zwischen dem Führungskörper 13 kann das Kühlwasser von der Innenseite zur Aussenseite des rohrförmigen Trägerteils 11 zirkulieren. Die axiale Erstreckung t des Führungskörpers 13 entspricht etwa der axialen Erstreckung s des Schneidkörper 12. Dadurch ist gewährleistet, dass die Führung bis zur vollständigen Abnutzung der Schneidkörper 12 genügend ist.The hollow drilling tool shown in FIG. 3 consists of a carrier part 11 and a cutting body 12 arranged at its front end 11a and a guide body 13. The guide body 13 is located between the carrier part 11 and the cutting bodies 12 and corresponds in cross section to the cutting body 12. The cutting body 12 and the guide body 13 can be connected to one another by sintering, soldering or welding. The guide body 13 is connected to the carrier part 11 by welding or soldering. The carrier part 11 and the guide body 13 are connected to one another only at the end. Due to the gaps between the guide body 13, the cooling water can circulate from the inside to the outside of the tubular support part 11. The axial extent t of the guide body 13 corresponds approximately to the axial extent s of the cutting body 12. This ensures that the guidance is sufficient until the cutting bodies 12 are completely worn out.

Claims (5)

  1. Hollow drill comprising a tubular carrier element (1, 11), having cutters (2, 12) arranged at its front end (1a, 11a) and a guide body (3, 13) of higher wear resistance relative to the carrier element (1, 11) which corresponds at least along part of its circumference with the outside contour of the cutter (2, 12) and which is in its axial extent (1, t) equal or larger than the cutter (2, 12), characterised in that the front end (3a) of the guide body (3, 13) is connected to the rear end (2b) of the cutter (2, 12), and the rear end (3b) of the guide body (3, 13) is connected to the front end (1a) of the carrier element (1, 12), and the carrier element (1, 12) is connected to the guide body (3, 13) by way of welding or soldering, and the guide body (3, 13) is connected to the cutter (2, 12) by sintering, soldering or welding.
  2. Hollow drill according to claim 1, characterised in that guide elements (3d, 13), which are arranged on the guide body (3, 13), are segmented.
  3. Hollow drill according to claim 2, characterised in that at least three circumferentially spaced segmented guide elements (3d, 13) are provided.
  4. Hollow drill according to claim 2 or 3, characterised in that the segmented guide elements (3d, 13) are arranged in opposition to the forward-thrust direction in an extension adjacent to the cutters (2, 12).
  5. Hollow drill according to one of claims 2 to 4, characterised in that segments are part of a guide body (3) which is arranged between the carrier element (1) and the cutters (2).
EP89810661A 1989-01-20 1989-09-05 Trepanning tool Expired - Lifetime EP0378964B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810661T ATE91933T1 (en) 1989-01-20 1989-09-05 HOLLOWING TOOL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3901528A DE3901528A1 (en) 1989-01-20 1989-01-20 HOLLOW DRILLING TOOL
DE3901528 1989-01-20

Publications (3)

Publication Number Publication Date
EP0378964A2 EP0378964A2 (en) 1990-07-25
EP0378964A3 EP0378964A3 (en) 1990-09-26
EP0378964B1 true EP0378964B1 (en) 1993-07-28

Family

ID=6372415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810661A Expired - Lifetime EP0378964B1 (en) 1989-01-20 1989-09-05 Trepanning tool

Country Status (6)

Country Link
US (1) US5069584A (en)
EP (1) EP0378964B1 (en)
JP (1) JPH02224978A (en)
AT (1) ATE91933T1 (en)
CA (1) CA2008169C (en)
DE (2) DE3901528A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005463B3 (en) * 2007-01-30 2008-05-29 Ting Fong Electric & Machinery Co. Ltd., Sanchung Process to manufacture a drill/milling tool with forged cylinder and sintered cutter ring joined by keyways
US9687916B2 (en) 2011-12-22 2017-06-27 Hilti Aktiengesellschaft Drill bit with an exchangeable cutting portion

Families Citing this family (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015683A1 (en) * 1989-06-14 1990-12-27 Tyrolit Schleifmittelwerke Swarovski K.G. Hollow drill
US5316416A (en) * 1992-09-29 1994-05-31 Ehwa Diamond Ind. Co., Ltd. Diamond cutting tool for hard articles
US5887655A (en) * 1993-09-10 1999-03-30 Weatherford/Lamb, Inc Wellbore milling and drilling
US5887668A (en) * 1993-09-10 1999-03-30 Weatherford/Lamb, Inc. Wellbore milling-- drilling
US5996571A (en) * 1996-02-01 1999-12-07 Diamond Products Joint Venture Diamond core drill bit
US5741097A (en) * 1996-06-20 1998-04-21 Murphy, Ii; John W. Heat exchanger fin remover
US5803194A (en) * 1996-11-19 1998-09-08 Kennametal Inc. Wear protector for a drilling tool
US5823276A (en) * 1996-12-24 1998-10-20 Beck, Iii; August H. Diamond-tipped core barrel and method of using same
JP3290103B2 (en) * 1997-06-11 2002-06-10 株式会社アライドマテリアル Core bit
US5865571A (en) * 1997-06-17 1999-02-02 Norton Company Non-metallic body cutting tools
US6203416B1 (en) * 1998-09-10 2001-03-20 Atock Co., Ltd. Outer-diameter blade, inner-diameter blade, core drill and processing machines using same ones
DE19926247B4 (en) * 1999-06-09 2005-08-04 Krauss-Maffei Wegmann Gmbh & Co. Kg Diamond core drill
US6196908B1 (en) * 1999-07-16 2001-03-06 Storage Technology Corporation Drill for composite materials
US20020137433A1 (en) * 2001-03-26 2002-09-26 Lee Lawrence K. Abrasive drill bit
AT5265U1 (en) * 2001-07-27 2002-05-27 Schraml Glastechnik Gmbh DIAMOND HOLLOW DRILL
EP1304199A1 (en) * 2001-10-18 2003-04-23 Marcrist International Limited Core drills with wear protection
US8191545B2 (en) * 2002-02-22 2012-06-05 Kim & Ed Pte Ltd Electroformed thin-wall core drills impregnated with abrasives
US6935325B1 (en) * 2002-11-01 2005-08-30 Lawrence L. Getty Method and apparatus for cutting and polishing stone articles
US7028790B2 (en) * 2003-09-19 2006-04-18 Jack Moore Associates, Inc. Rotary drill bit
WO2005095733A1 (en) * 2004-03-31 2005-10-13 Japan Science And Technology Agency Method for pre-attaching-fixing anchor bolt, and method and device for excavating anchor bolt burying hole
US7927189B2 (en) * 2004-08-16 2011-04-19 United Technologies Corporation Superabrasive tool
EP1841944B1 (en) * 2005-01-18 2014-03-05 Groupe Fordia Inc Bit for drilling a hole
GB2427843B (en) * 2005-10-24 2008-05-07 C4 Carbides Ltd Drill bit
US7204244B1 (en) 2006-03-02 2007-04-17 Luminare Supply Corporation Diamond core drill bit
US8221423B2 (en) * 2006-03-28 2012-07-17 Warsaw Orthopedic, Inc. Osteochondral plug graft harvesting instrument and kit
US20080100125A1 (en) * 2006-11-01 2008-05-01 Les Staples Abrasive cutter
US9540883B2 (en) 2006-11-30 2017-01-10 Longyear Tm, Inc. Fiber-containing diamond-impregnated cutting tools and methods of forming and using same
US9267332B2 (en) 2006-11-30 2016-02-23 Longyear Tm, Inc. Impregnated drilling tools including elongated structures
EP2092155B1 (en) * 2006-11-30 2017-05-03 Longyear TM, Inc. Fiber-containing diamond-impregnated cutting tools
US9506298B2 (en) 2013-11-20 2016-11-29 Longyear Tm, Inc. Drill bits having blind-hole flushing and systems for using same
AU2011201711B1 (en) * 2006-12-14 2011-07-28 Boart Longyear Company Core drill bit with extended matrix height
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
US9279292B2 (en) 2013-11-20 2016-03-08 Longyear Tm, Inc. Drill bits having flushing and systems for using same
US7628228B2 (en) * 2006-12-14 2009-12-08 Longyear Tm, Inc. Core drill bit with extended crown height
US20080181735A1 (en) * 2007-01-25 2008-07-31 Ting Fong Electric & Machinery Co., Ltd. Method for manufacturing drill cutters and structure thereof
CN101234468B (en) * 2007-01-30 2010-05-19 鼎峰电机工业股份有限公司 Method for manufacturing drilling tool and structure thereof
PE20090909A1 (en) * 2007-09-05 2009-07-02 Groupe Fordia Inc DRILL HOLE
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
US20130022421A1 (en) * 2011-07-21 2013-01-24 Robert Bosch Gmbh Abrasive coring bit
WO2014015154A1 (en) 2012-07-18 2014-01-23 Milwaukee Electric Tool Corporation Hole saw
CA2825729C (en) 2012-11-21 2018-05-22 Diamond Products, Limited Diamond mining core drill bit and methods of making thereof
EP2745965A1 (en) * 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Annular drill bit with a replaceable cutting section
EP2745966A1 (en) * 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Annular drill bit with a replaceable cutting section
CA2854691C (en) 2013-07-03 2017-10-31 Karl H. Moller Method of making diamond mining core drill bit and reamer
DE102014007958A1 (en) * 2014-06-04 2015-12-17 Vittorio Pittana Device and method for reducing the necessary drive power in core drilling
EP3037229A1 (en) * 2014-12-22 2016-06-29 HILTI Aktiengesellschaft Drill ring for a core drill bit
CA3143814A1 (en) 2015-01-12 2016-07-21 Longyear Tm, Inc. Drilling tools having matrices with carbide-forming alloys, and methods of making and using same
US11926005B2 (en) * 2017-08-03 2024-03-12 Vestas Wind Systems A/S Mill bit for the manufacture of a wind turbine blade and method of forming same
EP3501713A1 (en) * 2017-12-21 2019-06-26 HILTI Aktiengesellschaft Cutting section for a core bit
EP3820639A4 (en) 2018-07-10 2022-06-15 Milwaukee Electric Tool Corporation Hole saw with hex sidewall holes
US20200040663A1 (en) * 2018-08-02 2020-02-06 Qual Diamond Hi-Tech Corporation Electroformed thin-wall diamond drill bit with continuous wavy-shape blade
CN110424901B (en) * 2019-08-17 2021-05-18 温州瓯厦建设有限公司 Hole digger
US20210101248A1 (en) * 2019-10-07 2021-04-08 Paul Luccia Method and apparatus for forming holes
USD958855S1 (en) 2019-12-09 2022-07-26 Milwaukee Electric Tool Corporation Hole saw
USD959521S1 (en) * 2020-11-16 2022-08-02 Adam Abrams Tool

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE694502C (en) * 1938-10-05 1940-08-02 Walter Hebart A drilling tool consisting of a drill pipe and an attached drill head, in particular for producing long bores
US2996061A (en) * 1959-01-26 1961-08-15 Super Cut Abrasive diamond core drill
US3120286A (en) * 1962-01-04 1964-02-04 Jersey Prod Res Co Stabilized drag bit
SE337974B (en) * 1970-09-29 1971-08-23 Sandvikens Jernverks Ab
CA948181A (en) * 1971-02-12 1974-05-28 Lionel Lavallee Diamond drills
SU437621A1 (en) * 1972-06-21 1974-07-30 Предприятие П/Я В-2438 Diamond Hole Drill
SU745701A1 (en) * 1977-10-07 1980-07-07 Предприятие П/Я В-2438 Annular diamond drill
CA1053938A (en) * 1977-11-18 1979-05-08 Robert E. Generoux Drill bit
SU791890A1 (en) * 1978-01-30 1980-12-30 Ордена Трудового Красного Знамени Институт Сверхтвердых Материалов Ан Украинской Сср Core bit
US4208154A (en) * 1978-03-21 1980-06-17 Gundy William P Core drill
SU856821A1 (en) * 1979-04-06 1981-08-25 Всесоюзный Научно-Исследовательский Институт Нерудных Строительных Материалов И Гидромеханизации (Вниинеруд) Diamond tool for ring drilling
GB2052325A (en) * 1979-07-03 1981-01-28 Stark T Multi-cutter drilling bit tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005463B3 (en) * 2007-01-30 2008-05-29 Ting Fong Electric & Machinery Co. Ltd., Sanchung Process to manufacture a drill/milling tool with forged cylinder and sintered cutter ring joined by keyways
US9687916B2 (en) 2011-12-22 2017-06-27 Hilti Aktiengesellschaft Drill bit with an exchangeable cutting portion

Also Published As

Publication number Publication date
CA2008169C (en) 2000-01-04
US5069584A (en) 1991-12-03
EP0378964A2 (en) 1990-07-25
DE3901528A1 (en) 1990-07-26
EP0378964A3 (en) 1990-09-26
CA2008169A1 (en) 1990-07-20
DE58905054D1 (en) 1993-09-02
JPH02224978A (en) 1990-09-06
ATE91933T1 (en) 1993-08-15

Similar Documents

Publication Publication Date Title
EP0378964B1 (en) Trepanning tool
DE3040840C2 (en) Drill bit
EP2522447B1 (en) Drill and manufacturing method
AT390644B (en) MILLING TOOL
DE3111156C1 (en) Cutting element for rotary drill bits for deep drilling in earth formations
DE69825520T2 (en) Improvements to rotary drill bits
DE3039633C2 (en) Rotary drill bits, in particular for deep drilling
AT396663B (en) CLAMPING BUSH, IN PARTICULAR SPRING CLAMP SLEEVE
DE2817986A1 (en) DEEP DRILLING CHISEL
EP0707129B1 (en) Drilling tool with tool body and cutting inserts
DE2916347C3 (en) Bearing seat for direct drives of deep drilling bits or the like. tools or implements operating in a borehole
EP1083294B1 (en) Drilling tool
DE2509140A1 (en) DRILLING TOOL WITH DRILL AND ADAPTER
EP0603121A1 (en) Tubular drill
EP0351699A2 (en) Core drill bit
DE2917664C2 (en) Rotary drill bit for deep drilling
EP0112437B1 (en) Tool for an exact as well as a fine machining of cylindrical section openings
DE3118579C2 (en)
EP0706870B1 (en) Tubular saw
DE69820349T2 (en) Improvements to cutting elements with a surface made of super hard material
DE2821307C2 (en)
EP0334806B1 (en) Rock core bit
EP0352546A2 (en) Core drill bit
WO2011023429A1 (en) Dental drill
DE2943325A1 (en) TURNING TOOL FOR DEEP HOLES

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19901013

17Q First examination report despatched

Effective date: 19920103

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 91933

Country of ref document: AT

Date of ref document: 19930815

Kind code of ref document: T

REF Corresponds to:

Ref document number: 58905054

Country of ref document: DE

Date of ref document: 19930902

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930928

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 89810661.2

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20020904

Year of fee payment: 14

Ref country code: GB

Payment date: 20020904

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020910

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020911

Year of fee payment: 14

Ref country code: AT

Payment date: 20020911

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20020916

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20020930

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20021129

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030905

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030905

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030906

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030930

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030930

BERE Be: lapsed

Owner name: *HILTI A.G.

Effective date: 20030930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040401

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040401

GBPC Gb: european patent ceased through non-payment of renewal fee
EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040528

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20040401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050905