EP0937860B1 - Drill and or chisel tool - Google Patents

Drill and or chisel tool Download PDF

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Publication number
EP0937860B1
EP0937860B1 EP98811179A EP98811179A EP0937860B1 EP 0937860 B1 EP0937860 B1 EP 0937860B1 EP 98811179 A EP98811179 A EP 98811179A EP 98811179 A EP98811179 A EP 98811179A EP 0937860 B1 EP0937860 B1 EP 0937860B1
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EP
European Patent Office
Prior art keywords
head
grooves
tool according
removal
drilling
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
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EP98811179A
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German (de)
French (fr)
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EP0937860A1 (en
Inventor
Werner Dipl.-Ing. Kleine
Anton Knoller
Udo Hauptmann
Josef Starkmann
Harald Geiger
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Hilti AG
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Hilti AG
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Publication of EP0937860A1 publication Critical patent/EP0937860A1/en
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    • 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
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • 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
    • E21B10/58—Chisel-type inserts

Definitions

  • the invention relates to a drilling and / or chisel tool with one of the receptacles Drive units adapted plug-in end to which a shaft is attached in the drilling direction adjoins at least one helical discharge groove open to the circumference, wherein a drill head with a diameter substantially corresponding to the shaft is adjacent, the one or in recesses that are open to the free end has several carbide inserts, starting from one centering part in three Radial directions with at least to the circumference of the head Cutting areas are provided and between the cutting areas of the head three Has circumferentially open head grooves that are connected to the discharge grooves (see e.g. DE-A-38 20 695).
  • the tools of the type mentioned are mainly used to edit Rock, concrete and masonry.
  • these are with an insertion end provided which of the relevant recording of the application find Drive unit is adapted.
  • drive devices for example Hammer drills, combination hammers and chisel hammers.
  • a shank at the insertion end of the tool which has at least one helical discharge groove open to the circumference.
  • This helical discharge groove is used to transport the cuttings that come from the drill head, which is arranged adjacent to the shaft is dismantled.
  • the drill head with one or more carbide inserts, which have the free end protrude slightly from the drill head and are arranged in recesses which are open towards the free end of the drill head.
  • the arrangement of hard metal in the manner of a star has proven particularly useful Arrangement of cutting areas, according to which of a centrally arranged Centering part in three directions at essentially the same angle Carbide inserts run radially up to at least the circumference of the head.
  • This kind the arrangement of hard metal inserts leads to advantages in the drilling capacity in the Accuracy of the bore to be produced and in the quiet and therefore low-vibration Operating mode.
  • GB2075409A is a drilling tool with hard metal inserts and a two-start Conveying helix known, the drill head four cutting edges and each associated has four head grooves. Two adjacent head grooves open into a discharge groove Funding spiral. However, a drill head with four cutting edges does not correspond to the intended one Training with exactly three cutting edges.
  • a drilling tool with hard metal inserts in the drilling head has three or more asymmetrically arranged cutting edges and two or three head grooves. Each a top groove opens into a discharge groove of the conveyor helix.
  • the disadvantage is the number of Head grooves corresponding number of discharge grooves, which are only with three discharge grooves have difficult to control processes.
  • the invention is therefore based on the object of a drilling and / or chiseling tool with the advantageous arrangement of hard metal inserts mentioned above to further develop that it can also be done using easily controllable forming processes can be produced economically.
  • the object is achieved with a tool of the type mentioned at the outset in that the three head down are assigned to two discharge grooves.
  • a preferred one, which is particularly advantageous with regard to the removal of the cuttings effective embodiment is that one of the two discharge grooves with two Head grooves is connected.
  • This embodiment not only has advantages from the perspective of FIG Manufacture and use, but it also leads to an extraordinary appearance attractive design of the head. This argument is also for the economic Success of the tool according to the invention is important because an operator already From the visual impression, the tool is assessed as stable and efficient and trust him accordingly.
  • At least one of the Head grooves is connected to both discharge grooves. This condition is easy to meet, by providing the head groove in question with a length such that both of them Execution cuts.
  • the removal grooves can be formed with a view to an easily controllable forming uniformly distributed deformation forces, for example with extraction grooves, have the same cross-sectional areas.
  • the removal grooves can have different cross-sectional areas. This opens up the possibility, for example, that performance, which is connected with two head grooves, somewhat in the cross-sectional area to be made larger so that the drilling cuttings resulting from two head grooves are unimpeded can be transported.
  • the three head grooves have essentially the same cross-sectional areas.
  • the head is provided with cutouts which are open towards the free end, in which one or more hard metal inserts are arranged.
  • These recesses can be designed in different ways, but preferably penetrate the drilling direction End face of the head over its entire diameter: So they can Recesses run in a star shape in the form of a slot.
  • a one-piece carbide insert as a star can form the recess be shaped. For example, four are available when using multiple carbide inserts Parts, namely their three with radially star-shaped cutting areas and a centering part arranged in the middle.
  • the tool shown in FIGS. 1 and 2 is designed, for example, as a drilling tool and has an insertion end 1, a shaft 2 and a head 3.
  • the insertion end 1 is on a not shown drawing of a drive device adapted and thus has means for connection to this recording.
  • This Means consist of axially closed locking grooves 4 and one side axially open driving grooves 5.
  • the shaft 2 is provided with two discharge grooves 6, 7. Both discharge grooves 6,7 are Open to the extent and have the same cross-sectional areas in the present example.
  • the head 3 is provided with cutouts 8 which are open towards the free end.
  • Recesses 8 are - as also shown in FIG. 2 - a one-piece in the present example Tungsten carbide insert 9 arranged, which, starting from a centering part 9b in three Cutting areas 9a extending radially up to the circumference of the head 8 having.
  • three head grooves 10, 11, 12 are provided which run parallel to the main axis and to the circumference of the head 3 are open.
  • These head grooves 10,11,12 are with the Removal grooves 6, 7 connected.
  • the head grooves 10, 12 are with the Discharge groove 6 and the top groove 11 connected to the discharge groove 7.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Description

Die Erfindung betrifft ein Bohr- und/oder Meisselwerkzeug mit einem der Aufnahme von Antriebsgeräten angepasstem Einsteckende, an das sich in Bohrrichtung ein Schaft mit wenigstens einer zum Umfang hin offenen, wendelförmigen Abfuhrnut anschliesst, wobei dem Schaft ein Bohrkopf mit im wesentlichen dem Schaft entsprechenden Durchmesser benachbart ist, der in Aussparungen, die zum freien Ende hin offen sind, einen oder mehrere Hartmetalleinsätze aufweist, die ausgehend von einem Zentrierteil in drei Richtungen radial bis zumindest zum Umfang des Kopfes verlaufend mit Schneidbereichen versehen sind und zwischen den Schneidbereichen der Kopf drei zum Umfang hin offene Kopfnuten aufweist, die mit den Abfuhrnuten in Verbindung stehen (siehe z.B. DE-A-38 20 695).The invention relates to a drilling and / or chisel tool with one of the receptacles Drive units adapted plug-in end to which a shaft is attached in the drilling direction adjoins at least one helical discharge groove open to the circumference, wherein a drill head with a diameter substantially corresponding to the shaft is adjacent, the one or in recesses that are open to the free end has several carbide inserts, starting from one centering part in three Radial directions with at least to the circumference of the head Cutting areas are provided and between the cutting areas of the head three Has circumferentially open head grooves that are connected to the discharge grooves (see e.g. DE-A-38 20 695).

Die Werkzeuge der eingangs genannten Art dienen hauptsächlich der Bearbeitung von Gestein, Beton und Mauerwerk. Zum Antrieb der Werkzeuge sind diese mit einem Einsteckende versehen, welches der jeweils betreffenden Aufnahme des Anwendung findenden Antriebsgerätes angepasst ist. Dabei kommen als Antriebsgeräte beispielsweise Bohrhämmer, Kombihämmer und Meisselhämmer in Betracht.The tools of the type mentioned are mainly used to edit Rock, concrete and masonry. To drive the tools, these are with an insertion end provided which of the relevant recording of the application find Drive unit is adapted. Here come as drive devices, for example Hammer drills, combination hammers and chisel hammers.

In Bohrrichtung schliesst sich an das Einsteckende des Werkzeuges ein Schaft an, welcher zumindest eine zum Umfang hin offene, wendelförmige Abfuhrnut aufweist. Diese wendelförmige Abfuhrnut dient dem Transport des Bohrkleins, welches vom Bohrkopf, welcher dem Schaft benachbart angeordnet ist, abgebaut wird. Zu diesem Zwecke ist der Bohrkopf mit einem oder mehreren Hartmetalleinsätzen versehen, welche das freie Ende des Bohrkopfes geringfügig überragen und in Aussparungen angeordnet sind, welche zum freien Ende des Bohrkopfes hin offen sind.In the direction of drilling there is a shank at the insertion end of the tool, which has at least one helical discharge groove open to the circumference. This helical discharge groove is used to transport the cuttings that come from the drill head, which is arranged adjacent to the shaft is dismantled. For this purpose the Provide the drill head with one or more carbide inserts, which have the free end protrude slightly from the drill head and are arranged in recesses which are open towards the free end of the drill head.

Besonders bewährt hat sich die Anordnung von Hartmetall nach Art einer sternförmigen Anordnung von Schneidbreichen, gemäss welcher von einem mittig angeordneten Zentrierteil nach drei Richtungen unter im wesentlichen gleichen Winkel Hartmetalleinsätze radial bis zumindest zum Umfang des Kopfes hin verlaufen. Diese Art der Anordnung von Hartmetalleinsätzen führt zu Vorteilen in der Bohrleistung, in der Genauigkeit der herzustellenden Bohrung sowie in der ruhigen und damit vibrationsarmen Betriebsart.The arrangement of hard metal in the manner of a star has proven particularly useful Arrangement of cutting areas, according to which of a centrally arranged Centering part in three directions at essentially the same angle Carbide inserts run radially up to at least the circumference of the head. This kind the arrangement of hard metal inserts leads to advantages in the drilling capacity in the Accuracy of the bore to be produced and in the quiet and therefore low-vibration Operating mode.

Zwischen den Schneidbereichen der Hartmetalleinsätze weisen die in der vorgenannten Art aufgebauten Werkzeuge Kopfnuten auf, die parallel zur Hauptachse verlaufen und zum Umfang des Kopfes hin offen sind. Diese Kopfnuten sind wichtig, um das abgebaute Bohrklein den Abfuhrnuten zuzuführen. Im Hinblick auf die dadurch notwendige Verbindung zwischen Kopfnut und Abfuhrnut sind die bekannten Werkzeuge mit einer analogen Zahl an Kopfnuten und Abfuhmuten versehen, was dazu führt, dass die Werkzeuge mit drei Kopfnuten auch drei Abfuhmuten aufweisen.Between the cutting areas of the hard metal inserts, those in the aforementioned Kind of built-on tools head grooves that run parallel to the main axis and are open to the circumference of the head. These head grooves are important to the degraded Feed drill cuttings to the discharge grooves. With regard to the necessary Connection between head groove and discharge groove are the known tools with a analog number of head grooves and Abfuhmuten, which leads to the Tools with three head grooves also have three extraction grooves.

Die Herstellung von drei Abfuhrnuten schränkt die zur Anwendung gelangenden Produktionsverfahren ein. So kommt nebst der spanabhebenden Bearbeitung von den Umformverfahren allenfalls noch Rollwalzen in Betracht. An sich können beide Verfahren derart entwickelt werden, dass sie wirtschaftlich sind. Jedoch bedarf diese Weiterentwicklung zur Wirtschaftlichkeit eines besonderen apparativen Aufwandes und ist nicht von vornherein von jedermann beherrschbar.The production of three discharge grooves limits the production processes used on. So besides the machining comes from Forming processes at most roll rollers. As such, both methods can be used be developed in such a way that they are economical. However, this further development is required to the economic viability of a special expenditure on equipment and is not of controllable by everyone in advance.

Aus der GB2075409A ist ein Bohrwerkzeug mit Hartmetalleinsätzen und einem zweigängigen Förderwendel bekannt, dessen Bohrkopf vier Schneiden und diesen jeweils zugeordnete vier Kopfnuten aufweist. Jeweils zwei benachbarte Kopfnuten münden in eine Abfuhrnut der Förderwendel. Ein Bohrkopf mit vier Schneiden entspricht jedoch nicht der angestrebten Ausbildung mit genau drei Schneiden.GB2075409A is a drilling tool with hard metal inserts and a two-start Conveying helix known, the drill head four cutting edges and each associated has four head grooves. Two adjacent head grooves open into a discharge groove Funding spiral. However, a drill head with four cutting edges does not correspond to the intended one Training with exactly three cutting edges.

Nach der DE3820695A weist ein Bohrwerkzeug mit Hartmetalleinsätzen im Bohrkopf drei oder mehr asymmetrisch angeordnete Schneiden und zwei oder drei Kopfnuten auf. Jeweils eine Kopfnut mündet in eine Abfuhrnut der Förderwendel. Nachteilig ist die der Anzahl der Kopfnuten entsprechende Anzahl der Abfuhrnuten, welche sich bei drei Abfuhrnuten nur mit schwierig beherrschbaren Verfahren herstellen lassen.According to DE3820695A, a drilling tool with hard metal inserts in the drilling head has three or more asymmetrically arranged cutting edges and two or three head grooves. Each a top groove opens into a discharge groove of the conveyor helix. The disadvantage is the number of Head grooves corresponding number of discharge grooves, which are only with three discharge grooves have difficult to control processes.

Der Erfindung liegt demnach die Aufgabe zugrunde, ein Bohr- und/oder Meisselwerkzeug mit der eingangs genannten vorteilhaften Anordnung von Hartmetalleinsätzen derart weiterzubilden, dass es sich auch unter Anwendung einfach beherrschbarer Umformverfahren wirtschaftlich herstellen lässt.The invention is therefore based on the object of a drilling and / or chiseling tool with the advantageous arrangement of hard metal inserts mentioned above to further develop that it can also be done using easily controllable forming processes can be produced economically.

Erfindungsgemäss wird die Aufgabe bei einem Werkzeug der eingangs genannten Art dadurch gelöst, dass dendrei Kopfunten genan zwei Abfuhrnuten zugeornd sind.According to the invention, the object is achieved with a tool of the type mentioned at the outset in that the three head down are assigned to two discharge grooves.

Das Vorsehen von zwei Abfuhrnuten am geschilderten Werkzeug ermöglicht den Einsatz einfacher Herstellverfahren. Nebst der an sich noch immer möglichen spanabhebenden Herstellung eröffnet die erfindungsgemässe Ausbildung des Werkzeuges die Verwendung einer Umformung durch Drallwalzen. Diese Herstellungsart führt beispielsweise gegenüber der Herstellung durch Rollwalzen zu Vorteilen bei der Beherrschbarkeit und vermindert die Aufwendungen im Zusammenhang mit Produktionsmaschinen.The provision of two discharge grooves on the described tool enables the use of simple manufacturing processes. In addition to the still possible in itself Machining production opens up the design of the tool according to the invention the use of swirl roll forming. This type of manufacture leads for example, compared to the production by roller rolling at the advantages of Controllability and reduces expenses related to Production machines.

Besonders bewährt hat sich beim erfindungsgemässen Werkzeug das Vorsehen von zwei Abfuhrnuten, dies sowohl aus der Sicht der Herstellung als auch aus der Sicht des Einsatzes. Bei der Herstellung treten im Rahmen der Umformung symmetrische und damit leicht beherrschbare Verformungskräfte auf. Beim Einsatz der Werkzeuge führen zwei Abfuhrnuten zu einem problemlosen und ungehinderten Abbau des Bohrkleins.The provision of two has proven particularly useful in the tool according to the invention Removal grooves, both from the point of view of manufacture and from the point of view of use. During the manufacturing process, symmetrical and therefore occur during the forming process easily controllable deformation forces. When using the tools, two lead Discharge grooves for problem-free and unhindered removal of the cuttings.

Zur Verbindung der Abfuhrnuten mit den Kopfnuten bieten sich verschieden Möglichkeiten an. Eine bevorzugte, sich insbesondere hinsichtlich der Abfuhr des Bohrkleins vorteilhaft auswirkende Ausführungsform besteht darin, dass eine der zwei Abfuhrnuten mit zwei Kopfnuten verbunden ist. Diese Ausführungsform hat nicht nur Vorteile aus der Sicht der Herstellung und des Einsatzes, sondern sie führt auch optisch zu einer ausserordentlich ansprechenden Gestaltung des Kopfes. Auch dieses Argument ist für den wirtschaftlichen Erfolg des erfindungsgemässen Werkzeuges wichtig, da eine Bedienungsperson schon vom optischen Eindruck her das Werkzeug als standfest und leistungsfähig beurteilt und ihm somit entsprechendes Vertrauen entgegenbringt.There are various options for connecting the discharge grooves to the head grooves on. A preferred one, which is particularly advantageous with regard to the removal of the cuttings effective embodiment is that one of the two discharge grooves with two Head grooves is connected. This embodiment not only has advantages from the perspective of FIG Manufacture and use, but it also leads to an extraordinary appearance attractive design of the head. This argument is also for the economic Success of the tool according to the invention is important because an operator already From the visual impression, the tool is assessed as stable and efficient and trust him accordingly.

Bei der Gestaltung des Kopfes bieten sich im Zusammenhang mit den Kopfnuten weitere Möglichkeiten an, welche sich wiederum vorteilhaft auf den Transport des Bohrkleins auswirken. So besteht eine weitere bevorzugte Variante darin, dass zumindest eine der Kopfnuten mit beiden Abfuhrnuten verbunden ist. Diese Bedingung ist einfach erfüllbar, indem die betreffende Kopfnut mit einer derartigen Länge versehen wird, dass sie beide Abfuhmuten schneidet.When designing the head, there are more in connection with the head grooves Opportunities, which in turn are advantageous to the transportation of the cuttings impact. Another preferred variant is that at least one of the Head grooves is connected to both discharge grooves. This condition is easy to meet, by providing the head groove in question with a length such that both of them Execution cuts.

Die Abfuhrnuten können im Hinblick auf eine leicht beherrschbare Umformung durch gleichmässig verteilte Verformungskräfte, beispielsweise mit Abfuhmuten, versehen sein, die gleiche Querschnittsflächen aufweisen.The removal grooves can be formed with a view to an easily controllable forming uniformly distributed deformation forces, for example with extraction grooves, have the same cross-sectional areas.

Gemäss einer weiteren Ausgestaltung der Erfindung können die Abfuhrnuten unterschiedliche Querschnittsflächen aufweisen. Dies eröffnet beispielsweise die Möglichkeit, jene Abfuhmut, die mit zwei Kopfnuten verbunden ist, in der Querschnittsfläche etwas grösser zu gestalten, so dass das aus zwei Kopfnuten resultierende Bohrklein ungehindert transportiert werden kann.According to a further embodiment of the invention, the removal grooves can have different cross-sectional areas. This opens up the possibility, for example, that performance, which is connected with two head grooves, somewhat in the cross-sectional area to be made larger so that the drilling cuttings resulting from two head grooves are unimpeded can be transported.

Um den ruhigen Betrieb beim Einsatz der Bohrwerkzeuge nicht zu gefährden, weisen vorzugsweise die drei Kopfnuten im wesentlichen gleiche Querschnittsflächen auf.In order not to endanger the quiet operation when using the drilling tools, preferably point the three head grooves have essentially the same cross-sectional areas.

Wie eingangs erwähnt, ist der Kopf mit zum freien Ende hin offenen Aussparungen versehen, in welchen ein oder mehrere Hartmetalleinsätze angeordnet sind. Diese Aussparungen können verschiedenartig ausgebildet sein, durchsetzen aber vorzugsweise die bohrrichtungsseitige Stirnfläche des Kopfes über ihren gesamten Durchmesser: So können die Aussparungen sternartig in Form eines Schlitzes verlaufen. Nebst der Anordnung mehrerer Hartmetalleinsätze in diesen Aussparungen bietet es sich auch an, ein einstückig ausgebildeter Hartmetalleinsatz zu verwenden. Entsprechend der Anordnung der Aussparung kann ein solch einstückig ausgebildeter Hartmetalleinsatz als Stern geformt sein. Bei Verwendung mehrerer Hartmetalleinsätze bieten sich beispielsweise vier Teile an, nämlich deren drei mit radial sternförmig verlaufenden Schneidbereichen sowie ein mittig angeordneter Zentrierteil.As mentioned at the beginning, the head is provided with cutouts which are open towards the free end, in which one or more hard metal inserts are arranged. These recesses can be designed in different ways, but preferably penetrate the drilling direction End face of the head over its entire diameter: So they can Recesses run in a star shape in the form of a slot. In addition to the arrangement multiple carbide inserts in these recesses, it is also a good idea to use one-piece carbide insert. According to the arrangement such a one-piece carbide insert as a star can form the recess be shaped. For example, four are available when using multiple carbide inserts Parts, namely their three with radially star-shaped cutting areas and a centering part arranged in the middle.

Die Erfindung wird nachstehend anhand eines Ausführungsbeispieles näher erläutert. Es zeigen:

Fig. 1
das erfindungsgemässe Werkzeug in Seitenansicht;
Fig. 2
das Werkzeug der Fig. 1 in einer Draufsicht auf den Bohrkopf.
The invention is explained in more detail below using an exemplary embodiment. Show it:
Fig. 1
the tool according to the invention in side view;
Fig. 2
the tool of FIG. 1 in a plan view of the drill head.

Das den Fig. 1 und 2 entnehmbare Werkzeug ist beispielsweise als Bohrwerkzeug ausgebildet und weist ein Einsteckende 1, einen Schaft 2 sowie einen Kopf 3 auf.The tool shown in FIGS. 1 and 2 is designed, for example, as a drilling tool and has an insertion end 1, a shaft 2 and a head 3.

Das Einsteckende 1 ist an eine zeichnerisch nicht dargestellte Aufnahme eines Antriebsgerätes angepasst und weist somit Mittel zur Verbindung mit dieser Aufnahme auf. Diese Mittel bestehen zum einen aus axial geschlossenen Verriegelungsnuten 4 und einseitig axial offenen Drehmitnahmenuten 5.The insertion end 1 is on a not shown drawing of a drive device adapted and thus has means for connection to this recording. This Means consist of axially closed locking grooves 4 and one side axially open driving grooves 5.

Der Schaft 2 ist mit zwei Abfuhrnuten 6, 7 versehen. Beide Abfuhrnuten 6,7 sind zum Umfang hin offen und weisen im vorliegenden Beispiel gleiche Querschnittsflächen auf.The shaft 2 is provided with two discharge grooves 6, 7. Both discharge grooves 6,7 are Open to the extent and have the same cross-sectional areas in the present example.

Der Kopf 3 ist mit Aussparungen 8 versehen, die zum freien Ende hin offen sind. In diesen Aussparungen 8 ist - wie auch Figur 2 zeigt - im vorliegenden Beispiel ein einstückiger Hartmetalleinsatz 9 angeordnet, welcher ausgehend von einem Zentrierteil 9b in drei Richtungen radial bis über den Umfang des Kopfes 8 hin verlaufende Schneidbereiche 9a aufweist. Zwischen den radial verlaufenden Schneidbereichen 9a des Hartmetalleinsatzes 9 sind drei Kopfnuten 10,11,12 vorgesehen, die parallel zur Hauptachse verlaufen und zum Umfang des Kopfes 3 hin offen sind. Diese Kopfnuten 10,11,12 sind mit den Abfuhrnuten 6, 7 verbunden. Im gezeigten Beispiel sind die Kopfnuten 10,12 mit der Abfuhrnut 6 und die Kopfnut 11 mit der Abfuhrnut 7 verbunden.The head 3 is provided with cutouts 8 which are open towards the free end. In these Recesses 8 are - as also shown in FIG. 2 - a one-piece in the present example Tungsten carbide insert 9 arranged, which, starting from a centering part 9b in three Cutting areas 9a extending radially up to the circumference of the head 8 having. Between the radially extending cutting areas 9a of the hard metal insert 9, three head grooves 10, 11, 12 are provided which run parallel to the main axis and to the circumference of the head 3 are open. These head grooves 10,11,12 are with the Removal grooves 6, 7 connected. In the example shown, the head grooves 10, 12 are with the Discharge groove 6 and the top groove 11 connected to the discharge groove 7.

Claims (7)

  1. Drilling and/or chiselling tool, comprising an insert end (1) which is matched to the chuck of drive units and next to which, as seen in the drilling direction, lies a shaft (2) with at least one peripherally open helical removal groove (6, 7), and adjacent to the shaft (2) is a drilling head (3) of a diameter which substantially corresponds with the shaft (2), which comprises in cutouts (8), which are open towards the free end, one or more hard metal inserts (9) which are provided with cutting areas (9a) commencing from a central part (9b) in three directions radially to at least the periphery of the head (3), and the head (3) has between the cutting areas (9a) three peripherally open head grooves (10, 11, 12) which are joined to the removal grooves (6, 7), characterised in that the three head grooves (10, 11, 12) are associated with exactly two removal grooves (6, 7).
  2. Tool according to Claim 1, characterised in that the three cutting areas (9a) extend at an essentially equal angle radially up to the periphery of the head (3).
  3. Tool according to Claim 2, characterised in that one of the two removal grooves (6) is connected to two head grooves (10, 12).
  4. Tool according to Claim 2 or 3, characterised in that at least one of the head grooves (10, 11, 12) is connected to both removal grooves (6, 7).
  5. Tool according to one of Claims 2 to 4, characterised in that the removal grooves (6, 7) have identical cross-sectional surfaces.
  6. Tool according to one of Claims 2 to 4, characterised in that the removal grooves (6, 7) have different cross-sectional surfaces.
  7. Tool according to one of Claims 1 to 6, characterised in that the three head grooves (10, 11, 12) have essentially equal cross-sectional surfaces.
EP98811179A 1998-02-21 1998-11-27 Drill and or chisel tool Expired - Lifetime EP0937860B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19807394 1998-02-21
DE19807394A DE19807394A1 (en) 1998-02-21 1998-02-21 Drilling and / or chisel tools

Publications (2)

Publication Number Publication Date
EP0937860A1 EP0937860A1 (en) 1999-08-25
EP0937860B1 true EP0937860B1 (en) 2001-11-21

Family

ID=7858546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98811179A Expired - Lifetime EP0937860B1 (en) 1998-02-21 1998-11-27 Drill and or chisel tool

Country Status (6)

Country Link
US (1) US6116361A (en)
EP (1) EP0937860B1 (en)
JP (1) JP4361983B2 (en)
CN (2) CN1226627A (en)
DE (2) DE19807394A1 (en)
DK (1) DK0937860T3 (en)

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DE19942986A1 (en) * 1999-09-09 2001-03-15 Hilti Ag Drilling tool
DE19942985A1 (en) * 1999-09-09 2001-03-15 Hilti Ag Drilling tool
DE19942987A1 (en) * 1999-09-09 2001-03-15 Hilti Ag Drilling tool
US6374931B1 (en) 1999-11-03 2002-04-23 Relton Corporation Multiple cutter rotary hammer bit
DE10006936A1 (en) * 2000-02-16 2001-08-23 Hilti Ag Rock drilling tool
DE10053344A1 (en) * 2000-10-27 2002-05-08 Hilti Ag rock drill
DE10122299C2 (en) * 2001-05-08 2003-11-13 Tracto Technik Rock drilling method
GB2393681A (en) * 2002-10-03 2004-04-07 Black & Decker Inc Masonry drilling tool
JP4500748B2 (en) * 2005-09-02 2010-07-14 住友電工ハードメタル株式会社 Throw-away tool
US7861807B2 (en) * 2008-12-03 2011-01-04 Black & Decker Inc. Drill bit including one piece cutting head
DE102010013723A1 (en) 2010-03-31 2011-10-06 Gdf Suez Method for operating a horizontal drilling device and horizontal drilling device
JP2015507012A (en) * 2012-02-14 2015-03-05 ザ プロクター アンド ギャンブルカンパニー Topical use of skin symbiotic prebiotics and compositions containing them
CN103358404B (en) * 2012-03-28 2017-03-29 博世电动工具（中国）有限公司 Drilling tool and its drill bit
CN103419284A (en) * 2012-05-21 2013-12-04 博世电动工具（中国）有限公司 Drill bit
CN102704844A (en) * 2012-06-20 2012-10-03 常熟市平冶机械有限公司 Metal plate drill bit
EP3181261A1 (en) * 2015-12-15 2017-06-21 HILTI Aktiengesellschaft Method of manufacturing, tool scaffold and drill
CN108422019B (en) * 2018-04-25 2023-09-29 湖北鑫运祥科技发展有限公司 Three-blade split drill bit and manufacturing method thereof
US20220219306A1 (en) * 2021-01-14 2022-07-14 Milwaukee Electric Tool Corporation Tool bit

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DE2129913A1 (en) * 1971-06-16 1972-12-21 Hilti Ag Rock drill
GB2075409A (en) * 1980-05-09 1981-11-18 Vnii Tugoplavkikh Drills
DE3742661A1 (en) * 1987-12-16 1989-07-13 Hawera Probst Kg Hartmetall ROCK DRILL
DE3820695C2 (en) * 1988-06-18 1996-07-25 Hawera Probst Kg Hartmetall Rock drill
DE4338667A1 (en) * 1993-11-12 1995-05-18 Hilti Ag Drilling tool
DE4407119A1 (en) * 1993-12-11 1995-06-14 Hawera Probst Kg Hartmetall Rock drill
DE19516270C1 (en) * 1995-05-09 1997-01-30 Heller Dinklage Gmbh Geb Drilling tool
DE19545648A1 (en) * 1995-12-07 1997-06-12 Hilti Ag Rotary impact twist drill

Also Published As

Publication number Publication date
DE19807394A1 (en) 1999-08-26
EP0937860A1 (en) 1999-08-25
US6116361A (en) 2000-09-12
DK0937860T3 (en) 2002-05-21
CN1313255C (en) 2007-05-02
CN1631636A (en) 2005-06-29
CN1226627A (en) 1999-08-25
JPH11285911A (en) 1999-10-19
JP4361983B2 (en) 2009-11-11
DE59802704D1 (en) 2002-02-21

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