EP0363313A2 - Hollow stone-drilling tool - Google Patents

Hollow stone-drilling tool Download PDF

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Publication number
EP0363313A2
EP0363313A2 EP89810691A EP89810691A EP0363313A2 EP 0363313 A2 EP0363313 A2 EP 0363313A2 EP 89810691 A EP89810691 A EP 89810691A EP 89810691 A EP89810691 A EP 89810691A EP 0363313 A2 EP0363313 A2 EP 0363313A2
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EP
European Patent Office
Prior art keywords
drilling tool
slots
predetermined breaking
hollow drilling
breaking points
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
EP89810691A
Other languages
German (de)
French (fr)
Other versions
EP0363313A3 (en
EP0363313B1 (en
Inventor
Eugen Dr. Magyari
Gebhard Gantner
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
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Hilti AG
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Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Priority to AT89810691T priority Critical patent/ATE79071T1/en
Publication of EP0363313A2 publication Critical patent/EP0363313A2/en
Publication of EP0363313A3 publication Critical patent/EP0363313A3/en
Application granted granted Critical
Publication of EP0363313B1 publication Critical patent/EP0363313B1/en
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Classifications

    • 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
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • 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
    • 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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/605—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a core-bit

Definitions

  • the invention relates to a hollow drilling tool, in particular for rock such as concrete and the like, with a tubular support body which is provided at its front end in the feed direction with cutting segments containing hard materials and at least partially embedded in the support body.
  • Hollow drilling tools of the type mentioned are used, in particular, to create openings of larger diameter in buildings and increasingly also for dowel holes in concrete having iron reinforcements.
  • the cutting segments usually contain synthetically produced diamonds as hard materials.
  • the carrier body has, between the cutting segments, axially and radially extending slots extending from the front end and serving for the passage of the cooling water supplied through the hollow drilling tool.
  • the cooling water is supplied under more or less high pressure, the slits being able to be smaller the higher the prevailing pressure.
  • the slots may be dispensed with entirely, since the cooling water on the face of the hollow drilling tool passes from the inside to the outside. Conversely, large cross sections of the slots are necessary when the cooling water pressure is low. If the cross section of the slots is large and the pressure of the cooling water is high, the cooling water only flows through the slots from the inside to the outside of the hollow drilling tool and the face of the hollow drilling tool which is subjected to the greatest stress is practically not cooled.
  • the invention has for its object to provide a hollow drilling tool that allows the user to easily make and adapt slots to the given conditions.
  • the carrier body has one or more predetermined breaking points, which are arranged between individual cutting segments and run essentially in a U-shape and are open towards the front end and are formed by cross-sectional weakenings.
  • the user is able to easily break out the slits along the predetermined breaking points if necessary.
  • This breaking out can be done, for example, using pliers.
  • the predetermined breaking points are expediently formed by recesses from one side.
  • the recesses are preferably made before the cutting segments are inserted.
  • the recesses can be formed over a large area in accordance with the desired cross section of the water slots or as notches surrounding the slots. In the former case a kind of floating skin is created, in the second case the material thickness of the support body remains the same in the area of the slot to be made as in the other areas of the support body.
  • the recesses are preferably made from the outside of the carrier body, since this is more accessible than the inside.
  • the recesses can be made by embossing or machining.
  • Another advantageous embodiment consists in forming the predetermined breaking points by means of two recesses arranged radially opposite one another.
  • the provision of recesses arranged opposite one another is particularly in the case of non-cutting production by impressing the recess Mung advantageous because the forces acting radially on the tubular support body cancel each other and there is no deformation of the support body.
  • the recesses can be formed over a large area or as notches surrounding the slots.
  • Another expedient embodiment consists in forming the predetermined breaking points through perforations.
  • Such perforations can be made, for example, by drilling or punching small holes in the tubular support body. For certain applications, the sum of the cross-section of these holes can then suffice for the cooling water to pass through.
  • the web connecting the legs of the U-shaped predetermined breaking points is advantageously arranged at a different distance from the front end of the carrier body.
  • slots of different lengths and cross sections can be broken out. This enables the slots to be optimally adapted to the given pressure conditions of the cooling water.
  • the effective cross section of the slots can be kept approximately constant over the entire period of use of the hollow drilling tool by successively breaking out slots of different depths.
  • the cross section of the slots can also be changed by different widths, ie by the distance between the two webs.
  • the cross section of the slots In order to adapt the cross section of the slots, it is also expedient that several webs connecting the legs are provided. The entire depth of the slots is divided so that a gradual breaking out according to the desired cross section is made possible. In addition, by gradually breaking out individual parts, the cross-section can be kept approximately constant despite wear of the cutting segments.
  • the hollow drilling tool shown in FIGS. 1 and 2 consists essentially of a tubular support body 1 and at the front end of which there are completely inserted cutting segments 2. Between the cutting segments 2 there is the support body 1 with recesses 1b starting from the outside and starting from the inside Provide recesses 1c.
  • the recesses 1b and 1c are arranged radially opposite one another and have the shape of V-shaped notches.
  • the recesses 1b and 1c form predetermined breaking points which act as cross-sectional weakenings and which allow water slots 1d to be broken out.
  • the water slots 1d shown in FIG. 2 can be broken out in stages in accordance with the breaking off of a chocolate bar. This enables the cross section of the slots 1d to be adapted to the given conditions. With increasing wear of the cutting segments 2, further parts can also be broken out, so that the cross section of the slots 1d remains approximately the same during the entire period of use of the hollow drilling tool.
  • the hollow drilling tool shown in FIG. 3 consists of a tubular support body 11 and completely in receptacles 11a at the front end of the cutting body 12.
  • the recesses 11b create a type of webbed skin with a reduced wall thickness compared to the rest of the carrier body.
  • the recesses 11b also allow slots to be easily broken out, which can be done, for example, using pliers.
  • the hollow drilling tool shown in FIG. 4 consists of a tubular carrier body 21 and at the front end of which there are cutting segments 22 embedded in receptacles 21a.
  • the carrier body 21 is provided with continuous perforations 21b and 21c between the cutting segments. These perforations 21b and 21c enable water slots of different sizes to be broken out. The user can thus either break out only one of the two water slots or both water slots. Furthermore, it is possible to first break out the water slot 21d of less depth and, after the cutting segments 22 have worn out correspondingly, the part of the water slot 21e remaining in the carrier body.
  • the perforations 21b and 21c can be created by punching or drilling holes.

Abstract

The hollow drilling tool consisting of a tubular support body (1) and cutting segments (2) let into receptacles (1a) at the front end of the support body is provided with predetermined breaking points between the individual cutting segments (2), which predetermined breaking points run in a U-shape, are open towards the front end and are formed by cross-sectional reductions. The predetermined breaking points, formed as recesses (1b, 1c), enable slots (1d) to be broken out for the passage of the cooling water. <IMAGE>

Description

Die Erfindung betrifft ein Hohlbohrwerkzeug, insbesondere für Gestein wie Beton und dergleichen, mit einem rohrför­migen Trägerkörper, der an seinem in Vorschubrichtung vor­deren Ende mit wenigstens teilweise in den Trägerkörper ein­gelassenen, Hartstoffe enthaltenden Schneidsegmenten ver­sehen ist.The invention relates to a hollow drilling tool, in particular for rock such as concrete and the like, with a tubular support body which is provided at its front end in the feed direction with cutting segments containing hard materials and at least partially embedded in the support body.

Hohlbohrwerkzeuge der genannten Art werden insbesondere zum Schaffen von Durchbrüchen grösseren Durchmessers in Bauwerken und in zunehmendem Masse auch für Dübellöcher in Eisenarmie­rungen aufweisendem Beton verwendet. Die Schneidsegmente enthalten als Hartstoffe meist synthetisch hergestellte Diamanten. In einem solchen beispielsweise aus der US-PS 4 128 136 bekannten Hohlbohrwerkzeug weist der Trägerkörper zwischen den Schneidsegmenten vom vorderen Ende ausgehende, axial und radial verlaufende, dem Durchtritt des durch das Hohlbohrwerkzeug zugeführten Kühlwassers dienende Schlitze auf. Das Kühlwasser wird je nach vorhandender Einrichtung unter mehr oder weniger grossem Druck zugeführt, wobei die Schlitze umso kleiner sein können, je höher der herrschende Druck ist. Bei genügend hohem Druck des Kühlwassers kann eventuell ganz auf die Schlitze verzichtet werden, da das Kühlwasser an der Stirnseite des Hohlbohrwerkzeuges von der Innenseite zur Aussenseite gelangt. Umgekehrt sind bei ge­ringem Druck des Kühlwassers grosse Querschnitte der Schlitze notwendig. Bei grossem vorhandenem Querschnitt der Schlitze und hohem Druck des Kühlwassers strömt das Kühl­wasser jedoch nur durch die Schlitze von der Innenseite zur Aussenseite des Hohlbohrwerkzeuges und die am stärksten be­anspruchte Stirnseite des Hohlbohrwerkzeuges wird praktisch nicht gekühlt.Hollow drilling tools of the type mentioned are used, in particular, to create openings of larger diameter in buildings and increasingly also for dowel holes in concrete having iron reinforcements. The cutting segments usually contain synthetically produced diamonds as hard materials. In such a hollow drilling tool, known for example from US Pat. No. 4,128,136, the carrier body has, between the cutting segments, axially and radially extending slots extending from the front end and serving for the passage of the cooling water supplied through the hollow drilling tool. Depending on the existing equipment, the cooling water is supplied under more or less high pressure, the slits being able to be smaller the higher the prevailing pressure. If the pressure of the cooling water is sufficiently high, the slots may be dispensed with entirely, since the cooling water on the face of the hollow drilling tool passes from the inside to the outside. Conversely, large cross sections of the slots are necessary when the cooling water pressure is low. If the cross section of the slots is large and the pressure of the cooling water is high, the cooling water only flows through the slots from the inside to the outside of the hollow drilling tool and the face of the hollow drilling tool which is subjected to the greatest stress is practically not cooled.

Aus dem genannten Grunde sind gewisse Hersteller von Hohl­bohrwerkzeugen dazu übergegangen, Hohlbohrwerkzeuge ohne Schlitze zu liefern und ein Anbringen von Schlitzen dem An­wender zu überlassen. Diese Verlagerung des Anbringens von Schlitzen vom Hersteller zum Anwender führt zu einem Mehr­aufwand und Problemen aufgrund eines vielfachen Fehlens geeigneter Werkzeuge beim Anwender.For the above-mentioned reason, certain manufacturers of hollow drilling tools have started to supply hollow drilling tools without slots and to leave the application of slots to the user. This shift in the placement of slots from the manufacturer to the user leads to additional effort and problems due to a multiple lack suitable tools for the user.

Der Erfindung liegt die Aufgabe zugrunde, ein Hohlbohrwerk­zeug zu schaffen, das dem Anwender ein einfaches Anbringen und Anpassen von Schlitzen an die gegebenen Verhältnisse ermöglicht.The invention has for its object to provide a hollow drilling tool that allows the user to easily make and adapt slots to the given conditions.

Gemäss der Erfindung wird dies dadurch erreicht, dass der Trägerkörper eine oder mehrere zwischen einzelnen Schneid­segmenten angeordnete, im wesentlichen U-förmig verlaufende, zum vorderen Ende hin offene, durch Querschnittsschwächungen gebildete Sollbruchstellen aufweist.According to the invention, this is achieved in that the carrier body has one or more predetermined breaking points, which are arranged between individual cutting segments and run essentially in a U-shape and are open towards the front end and are formed by cross-sectional weakenings.

Durch das Anbringen der erfindungsgemässen Sollbruchstellen wird es dem Anwender ermöglicht, im Bedarfsfalle die Schlitze entlang den Sollbruchstellen auf einfache Weise herauszu­brechen. Dieses Herausbrechen kann beispielsweise mittels einer Zange erfolgen.By attaching the predetermined breaking points according to the invention, the user is able to easily break out the slits along the predetermined breaking points if necessary. This breaking out can be done, for example, using pliers.

Die Sollbruchstellen werden zweckmässigerweise durch Ausneh­mungen von einer Seite her gebildet. Das Anbringen der Aus­nehmungen erfolgt vorzugsweise vor dem Einsetzen der Schneid­segmente. Die Ausnehmungen können entsprechend dem gewünsch­ten Querschnitt der Wasserschlitze grossflächig oder als die Schlitze umgebende Kerben ausgebildet sein. Im ersteren Fall entsteht eine Art Schwimmhaut, im zweiten Fall bleibt die Materialstärke des Trägekörpers im Bereich des anzubringen­den Schlitzes gleich wie in den übrigen Bereichen des Träger­körpers. Das Anbringen der Ausnehmungen erfolgt vorzugsweise von der Aussenseite des Trägerkörpers her, da diese besser zugänglich ist, als die Innenseite. Die Ausnehmungen können durch Einprägen oder spanabhebende Bearbeitung hergestellt werden.The predetermined breaking points are expediently formed by recesses from one side. The recesses are preferably made before the cutting segments are inserted. The recesses can be formed over a large area in accordance with the desired cross section of the water slots or as notches surrounding the slots. In the former case a kind of floating skin is created, in the second case the material thickness of the support body remains the same in the area of the slot to be made as in the other areas of the support body. The recesses are preferably made from the outside of the carrier body, since this is more accessible than the inside. The recesses can be made by embossing or machining.

Eine weitere vorteilhafte Ausführung besteht darin, die Sollbruchstellen durch zwei einander radial gegenüberliegend angeordnete Ausnehmungen auszubilden. Das Anbringen von einan­der gegenüberliegend angeordneten Ausnehmungen ist insbeson­dere bei der spanlosen Herstellung durch Einprägen der Ausneh­ mungen vorteilhaft, da sich dabei die radial auf den rohrför­migen Trägerkörper einwirkenden Kräfte aufheben und keine Verformung des Trägerkörpers erfolgt. Auch in diesem Fall können die Ausnehmungen grossflächig oder als die Schlitze umgebende Kerben ausgebildet sein.Another advantageous embodiment consists in forming the predetermined breaking points by means of two recesses arranged radially opposite one another. The provision of recesses arranged opposite one another is particularly in the case of non-cutting production by impressing the recess Mung advantageous because the forces acting radially on the tubular support body cancel each other and there is no deformation of the support body. In this case too, the recesses can be formed over a large area or as notches surrounding the slots.

Eine weitere zweckmässige Ausführung besteht darin, die Sollbruchstellen durch Perforationen zu bilden. Sol­che Perforationen können beispielsweise durch Bohren oder Stanzen von kleinen Löchern im rohrförmigen Trägerkörper angebracht werden. Für gewisse Anwendungen kann dann be­reits die Summe des Querschnittes dieser Löcher für den Durchtritt des Kühlwassers genügen.Another expedient embodiment consists in forming the predetermined breaking points through perforations. Such perforations can be made, for example, by drilling or punching small holes in the tubular support body. For certain applications, the sum of the cross-section of these holes can then suffice for the cooling water to pass through.

Der die Schenkel der U-förmig verlaufenden Sollbruchstellen verbindende Steg ist vorteilhaft in unterschiedlichem Ab­stand vom vorderen Ende des Trägerkörpers angeordnet. Somit können Schlitze von unterschiedlicher Länge und unterschied­lichem Querschnitt herausgebrochen werden. Dies ermöglicht eine optimale Anpassung der Schlitze an die gegebenen Druck­verhältnisse des Kühlwassers. Ausserdem kann über die gesamte Einsatzdauer des Hohlbohrwerkzeuges durch sukzessives Heraus­brechen von Schlitzen unterschiedlicher Tiefe der effektive Querschnitt der Schlitze etwa konstant gehalten werden. Neben unterschiedlicher Tiefe kann der Querschnitt der Schlitze auch durch unterschiedliche Breite, dh durch den Abstand der beiden Stege verändert werden.The web connecting the legs of the U-shaped predetermined breaking points is advantageously arranged at a different distance from the front end of the carrier body. In this way, slots of different lengths and cross sections can be broken out. This enables the slots to be optimally adapted to the given pressure conditions of the cooling water. In addition, the effective cross section of the slots can be kept approximately constant over the entire period of use of the hollow drilling tool by successively breaking out slots of different depths. In addition to different depths, the cross section of the slots can also be changed by different widths, ie by the distance between the two webs.

Zur Anpassung des Querschnittes der Schlitze ist es ausser­dem zweckmässig, dass mehrere die Schenkel verbindende Stege vorgesehen sind. Die gesamte Tiefe der Schlitze wird dadurch unterteilt, so dass ein stufenweises Herausbrechen entspre­chend dem gewünschten Querschnitt ermöglicht wird. Ausser­dem kann durch allmähliches Herausbrechen einzelner Teile der Querschnitt trotz Abnutzung der Schneidsegmente etwa konstant gehalten werden.In order to adapt the cross section of the slots, it is also expedient that several webs connecting the legs are provided. The entire depth of the slots is divided so that a gradual breaking out according to the desired cross section is made possible. In addition, by gradually breaking out individual parts, the cross-section can be kept approximately constant despite wear of the cutting segments.

Die Erfindung soll nachstehend, anhand der sie beispielsweise darstellenden Zeichnungen, näher erläutert werden. Es zeigen:

  • Fig. 1 ein erfindungsgemässes Hohlbohrwerkzeug mit Einprägungen zum Herausbrechen von Schlitzen für das Kühlwasser;
  • Fig. 2 das Hohlbohrwerkzeug gemäss Fig. 1, mit teil­weise herausgebrochenen Schlitzen;
  • Fig. 3 ein weiteres erfindungsgemässes Hohlbohrwerk­zeug mit grossflächigen Ausnehmengen zum Her­ausbrechen von Schlitzen;
  • Fig. 4 ein weiteres erfindungsgemässes Hohlbohrwerk­zeug mit durch Perforationen gebildeten Soll­bruchstellen zum Herausbrechen von Schlitzen von unterschiedlicher Länge.
The invention will be explained in more detail below with reference to the drawings which illustrate it, for example. Show it:
  • 1 shows a hollow drilling tool according to the invention with impressions for breaking out slots for the cooling water;
  • FIG. 2 shows the hollow drilling tool according to FIG. 1, with the slots partially broken away;
  • 3 shows a further hollow drilling tool according to the invention with large recesses for breaking out slots;
  • Fig. 4 shows another hollow drilling tool according to the invention with predetermined breaking points formed by perforations for breaking out slots of different lengths.

Das aus Fig. 1 und 2 ersichtliche Hohlbohrwerkzeug besteht im wesentlichen aus einem rohrförmigen Trägerkörper 1 und an dessen vorderem Ende vollständig in Aufnahmen la eingelas­senen Schneidsegmenten 2. Zwischen den Schneidsegmenten 2 ist der Trägerkörper 1 mit von der Aussenseite ausgehenden Ausnehmungen 1b und von der Innenseite ausgehenden Ausneh­mungen 1c versehen. Die Ausnehmungen 1b und 1c sind einander radial gegenüberliegend angeordnet und weisen die Form von V-förmigen Kerben auf. Die Ausnehmungen 1b und 1c bilden als Querschnittsschwächungen wirkende Sollbruchstellen, welche das Herausbrechen von Wasserschlitzen 1d ermöglichen. Das Herausbrechen der in Fig. 2 dargestellten Wasserschlitze 1d kann entsprechend dem Abbrechen einer Schokoladetafel stu­fenweise erfolgen. Dadurch wird ein Anpassen des Querschnit­tes der Schlitze 1d an die gegebenen Verhältnisse ermög­licht. Bei zunehmender Abnutzung der Schneidsegmente 2 kön­nen auch weitere Teile herausgebrochen werden, so dass der Querschnitt der Schlitze 1d während der gesamten Einsatzdauer des Hohlbohrwerkzeuges etwa gleich bleibt.The hollow drilling tool shown in FIGS. 1 and 2 consists essentially of a tubular support body 1 and at the front end of which there are completely inserted cutting segments 2. Between the cutting segments 2 there is the support body 1 with recesses 1b starting from the outside and starting from the inside Provide recesses 1c. The recesses 1b and 1c are arranged radially opposite one another and have the shape of V-shaped notches. The recesses 1b and 1c form predetermined breaking points which act as cross-sectional weakenings and which allow water slots 1d to be broken out. The water slots 1d shown in FIG. 2 can be broken out in stages in accordance with the breaking off of a chocolate bar. This enables the cross section of the slots 1d to be adapted to the given conditions. With increasing wear of the cutting segments 2, further parts can also be broken out, so that the cross section of the slots 1d remains approximately the same during the entire period of use of the hollow drilling tool.

Das aus Fig. 3 ersichtliche Hohlbohrwerkzeug besteht aus einem rohrförmigen Trägerkörper 11 und vollständig in Aufnahmen 11a am vorderen Ende des Trägerkörpers eingelassenen Schneid­segmenten 12. Der Trägerkörper 11 ist zwischen den Schneidseg­menten 12 mit von der Aussenseite des Trägerkörpers 11 ausgehen­den, grossflächigen Ausnehmungen 11b versehen. Durch die Ausnehmungen 11b entstehen eine Art Schwimmhäute von gegenüber dem restlichen Trägerkörper reduzierter Wandstärke. Die Aus­nehmungen 11b ermöglichen ebenfalls ein einfaches Herausbre­chen von Schlitzen, welches beispielsweise mittels einer Zange erfolgen kann.The hollow drilling tool shown in FIG. 3 consists of a tubular support body 11 and completely in receptacles 11a at the front end of the cutting body 12. The recesses 11b create a type of webbed skin with a reduced wall thickness compared to the rest of the carrier body. The recesses 11b also allow slots to be easily broken out, which can be done, for example, using pliers.

Das aus Fig. 4 ersichtliche Hohlbohrwerkzeug besteht aus einem rohrförmigen Trägerkörper 21 und an dessen vorderem Ende in Aufnahmen 21a eingelassenen Schneidsegmenten 22. Der Trä­gerkörper 21 ist zwischen den Schneidsegmenten mit durchgehen­den Perforationen 21b und 21c versehen. Diese Perforationen 21b und 21c ermöglichen ein Herausbrechen von unterschiedlich grossen Wasserschlitzen. Der Anwender kann somit wahlweise nur einen der beiden Wasserschlitze oder beide Wasserschlit­ze herausbrechen. Weiterhin ist es möglich, zunächst den Was­serschlitz 21d von geringerer Tiefe und nach entsprechender Abnutzung der Schneidsegmente 22 den im Trägerkörper verblei­benden Teil des Wasserschlitzes 21e herauszubrechen. Die Per­forationen 21b und 21c können durch Stanzen oder Bohren von Löchern erzeugt werden.The hollow drilling tool shown in FIG. 4 consists of a tubular carrier body 21 and at the front end of which there are cutting segments 22 embedded in receptacles 21a. The carrier body 21 is provided with continuous perforations 21b and 21c between the cutting segments. These perforations 21b and 21c enable water slots of different sizes to be broken out. The user can thus either break out only one of the two water slots or both water slots. Furthermore, it is possible to first break out the water slot 21d of less depth and, after the cutting segments 22 have worn out correspondingly, the part of the water slot 21e remaining in the carrier body. The perforations 21b and 21c can be created by punching or drilling holes.

Claims (6)

1. Hohlbohrwerkzeug, insbesondere für Gestein wie Beton und dergleichen, mit einem Trägerkörper (1, 11, 21), der an seinem in Vorschubrichtung vorderen Ende mit wenigstens teilweise in den Trägerkörper (1, 11, 21) eingelassenen, Hartstoffe enthaltenden Schneidsegmenten (2, 12, 22) versehen ist, dadurch gekennzeich­net, dass der Trägerkörper (1, 11, 21) eine oder meh­rere zwischen einzelnen Schneidsegmenten (2, 12, 22) angeordnete, im wesentlichen U-förmig verlaufende, zum vorderen Ende hin offene, durch Querschnittsschwächungen gebildete Sollbruchstellen aufweist.1. Hollow drilling tool, in particular for rock such as concrete and the like, with a carrier body (1, 11, 21) which, at its front end in the feed direction, has cutting segments (2 , 12, 22), characterized in that the carrier body (1, 11, 21) has one or more, arranged between individual cutting segments (2, 12, 22), essentially U-shaped, open towards the front end Cross-sectional weakening has predetermined breaking points. 2. Hohlbohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass die Sollbruchstellen durch Ausnehmungen (11b) von einer Seite her gebildet sind.2. Hollow drilling tool according to claim 1, characterized in that the predetermined breaking points are formed by recesses (11b) from one side. 3. Hohlbohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass die Sollbruchstellen durch zwei einander radial gegenüberliegend angeordnete Ausnehmungen (1b, 1c) gebil­det sind.3. Hollow drilling tool according to claim 1, characterized in that the predetermined breaking points are formed by two radially opposite recesses (1b, 1c). 4. Hohlbohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass die Sollbruchstellen durch Perforationen (21b, 21c) gebildet sind.4. Hollow drilling tool according to claim 1, characterized in that the predetermined breaking points are formed by perforations (21b, 21c). 5. Hohlbohrwerkzeug nach einem der Ansprüche 1 bis 4, da­durch gekennzeichnet, dass der die Schenkel der U-förmig verlaufenden Sollbruchstelle verbindende Steg in unter­schiedlichem Abstand vom vorderen Ende des Trägerkörpers angeordnet ist.5. Hollow drilling tool according to one of claims 1 to 4, characterized in that the web connecting the legs of the U-shaped predetermined breaking point is arranged at a different distance from the front end of the carrier body. 6. Hohlbohrwerkzeug nach Anspruch 5, dadurch gekennzeichnet, dass mehrere die Schenkel verbindende Stege vorgesehen sind.6. Hollow drilling tool according to claim 5, characterized in that a plurality of webs connecting the legs are provided.
EP89810691A 1988-10-05 1989-09-14 Hollow stone-drilling tool Expired - Lifetime EP0363313B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810691T ATE79071T1 (en) 1988-10-05 1989-09-14 HOLLOWING TOOL FOR ROCK.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3833767 1988-10-05
DE3833767A DE3833767A1 (en) 1988-10-05 1988-10-05 HOLLOW DRILLING TOOL FOR STONE

Publications (3)

Publication Number Publication Date
EP0363313A2 true EP0363313A2 (en) 1990-04-11
EP0363313A3 EP0363313A3 (en) 1990-12-27
EP0363313B1 EP0363313B1 (en) 1992-08-05

Family

ID=6364376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810691A Expired - Lifetime EP0363313B1 (en) 1988-10-05 1989-09-14 Hollow stone-drilling tool

Country Status (3)

Country Link
EP (1) EP0363313B1 (en)
AT (1) ATE79071T1 (en)
DE (2) DE3833767A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666843A1 (en) * 1990-09-14 1992-03-20 Total Petroles SIZE OF DRILLING TOOL SELF-AFFUTABLE.
WO2006076795A1 (en) 2005-01-18 2006-07-27 Groupe Fordia Inc Bit for drilling a hole
WO2009030052A1 (en) * 2007-09-05 2009-03-12 Groupe Fordia Inc. Drill bit
CN103774996A (en) * 2014-01-26 2014-05-07 中国地质大学（武汉） Diamond drill bit which cannot generate electron hole phenomenon
RU2577351C1 (en) * 2015-01-26 2016-03-20 Александр Александрович Третьяк Stabilising core bit
RU2613712C1 (en) * 2016-03-29 2017-03-21 Александр Александрович Третьяк Anti-vibration ring drill crown
RU171734U1 (en) * 2017-01-09 2017-06-13 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Diamond core for drilling
RU202233U1 (en) * 2020-02-28 2021-02-08 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Diamond core bit for drilling
RU2745546C1 (en) * 2020-10-12 2021-03-26 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Diamond drill bit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4301985C2 (en) * 1993-01-26 1997-06-05 Bilfinger Berger Bau Process for producing a borehole for the injection of cement-bound fillings into cracks
CN109930999B (en) * 2019-04-01 2020-06-30 无锡锡钻地质装备有限公司 Geological exploration drill bit and manufacturing process thereof

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US4128136A (en) * 1977-12-09 1978-12-05 Lamage Limited Drill bit
US4190126A (en) * 1976-12-28 1980-02-26 Tokiwa Industrial Co., Ltd. Rotary abrasive drilling bit
EP0280835A1 (en) * 1987-03-02 1988-09-07 HILTI Aktiengesellschaft Hollow drill tool

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US4190126A (en) * 1976-12-28 1980-02-26 Tokiwa Industrial Co., Ltd. Rotary abrasive drilling bit
US4128136A (en) * 1977-12-09 1978-12-05 Lamage Limited Drill bit
EP0280835A1 (en) * 1987-03-02 1988-09-07 HILTI Aktiengesellschaft Hollow drill tool

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666843A1 (en) * 1990-09-14 1992-03-20 Total Petroles SIZE OF DRILLING TOOL SELF-AFFUTABLE.
WO1992005335A1 (en) * 1990-09-14 1992-04-02 Total Self-shaping drill cutting edge
US5301762A (en) * 1990-09-14 1994-04-12 Total Drilling tool fitted with self-sharpening cutting edges
EP1841944A4 (en) * 2005-01-18 2013-01-23 Fordia Inc Groupe Bit for drilling a hole
EP1841944A1 (en) * 2005-01-18 2007-10-10 Fordia Inc Groupe Bit for drilling a hole
WO2006076795A1 (en) 2005-01-18 2006-07-27 Groupe Fordia Inc Bit for drilling a hole
WO2009030052A1 (en) * 2007-09-05 2009-03-12 Groupe Fordia Inc. Drill bit
AU2008295417B2 (en) * 2007-09-05 2013-07-25 Groupe Fordia Inc. Drill bit
CN103774996A (en) * 2014-01-26 2014-05-07 中国地质大学（武汉） Diamond drill bit which cannot generate electron hole phenomenon
RU2577351C1 (en) * 2015-01-26 2016-03-20 Александр Александрович Третьяк Stabilising core bit
RU2613712C1 (en) * 2016-03-29 2017-03-21 Александр Александрович Третьяк Anti-vibration ring drill crown
RU171734U1 (en) * 2017-01-09 2017-06-13 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Diamond core for drilling
RU202233U1 (en) * 2020-02-28 2021-02-08 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Diamond core bit for drilling
RU2745546C1 (en) * 2020-10-12 2021-03-26 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Diamond drill bit

Also Published As

Publication number Publication date
ATE79071T1 (en) 1992-08-15
EP0363313A3 (en) 1990-12-27
DE3833767A1 (en) 1990-04-12
DE58901984D1 (en) 1992-09-10
EP0363313B1 (en) 1992-08-05

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