EP1652643B1 - Method for manufacturing a core drill - Google Patents

Method for manufacturing a core drill Download PDF

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Publication number
EP1652643B1
EP1652643B1 EP05022545A EP05022545A EP1652643B1 EP 1652643 B1 EP1652643 B1 EP 1652643B1 EP 05022545 A EP05022545 A EP 05022545A EP 05022545 A EP05022545 A EP 05022545A EP 1652643 B1 EP1652643 B1 EP 1652643B1
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EP
European Patent Office
Prior art keywords
parent material
core
slots
strip material
cutting elements
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Not-in-force
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EP05022545A
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German (de)
French (fr)
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EP1652643A1 (en
Inventor
Steffen Hoffmann-Blecker
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D65/00—Making tools for sawing machines or sawing devices for use in cutting any kind of material
    • 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

Definitions

  • the invention relates to a method for producing a drill bit according to the preamble of claim 1.
  • Such a method is the US 4,667,755 refer to.
  • Drill bits for drilling in the construction sector consist of a drill bit tube as a carrier body with a connection component for connection to a drill drive (drill or drill motor) and from the drill bit tube mounted cutting elements (segments or segment rings). of diamonds bound in a metal sinter matrix.
  • the cutting elements generally have widths of about 3.0 to 6.0 mm.
  • the width depends on the diameter of the drill bit and the power of the drill drive used. For reasons of durability and stability, drill bits (support body) with larger wall thicknesses and correspondingly wider cutting elements must be used for high drive capacities and large diameters.
  • the height of the projection of the cutting elements in the axial direction is a maximum of about 10 mm. Larger heights are usable only in a few special cases, since with increasing height, the risk of tearing of the cutting elements or instabilities greatly increases.
  • the dimensions of the cutting elements in the circumferential direction of the drill bit is usually about 10 to 25 mm. Shorter cutting elements are very unfavorable for stability reasons, longer cutting elements for manufacturing and geometric reasons.
  • the cutting elements are usually optimized for the purpose, e.g. by the choice of appropriate metal powder alloys for the sinter matrix (hardness, diamond bond, wear behavior, etc.), the diamonds embedded therein (concentration, quality, crystallinity, size, fracture behavior, etc.) and the manufacturing parameters (temperature, pressure, time, etc.).
  • These cutting elements are produced as individual elements in series or as multiple elements in series, from which individual elements are separated, and manually or automatically soldered or laser welded to the plan ground drill core tube.
  • the invention has for its object to increase the number of cutting elements used in the simultaneous stable attachment of the cutting elements on the drill bit without simultaneously increasing the cutting element surface, thereby also the production cost for the production of the cutting elements to be reduced, in so far when only one cutting element size is needed for a variety of drill bit diameters. So it is a general suitability for virtually all common drill bits diameter can be achieved, so that a simple mechanical or manual production is possible, taking into account the Bohrkronenstabiltician and the width of the cutting elements and / or the Bohrkronen wall thickness can be reduced, so that the production of drill bits with smaller cutting widths is possible.
  • a straight strip material 1 for example as in Fig. 1a to 1c represented, used, for example, punched out of the slots 2 or cut out by laser.
  • Fig. 1a the slots 2 are relatively narrow and have a relatively small distance from each other.
  • Fig. 1b the slots 2 are slightly inclined, and after Fig. 1c the slots 2 are larger and have one opposite Fig. 1a greater distance from each other.
  • the strip material 1 may consist of steel, other composites or metal alloys. In the simplest case, it consists of the same material as the carrier body 3 (see, eg Fig. 2a to 2c ).
  • Cutting elements 4 are fixed on three sides by conventional methods on the strip material 1, and since the attachment to the support body 3 (drill bit tube) is not only on the foot of the cutting element 4, the strip material 1 with the same stable attachment of the cutting elements 4 not only a thickness D. B equal to the wall thickness D w of the tubular support body 3 ( Fig. 2a ), but also a thickness d B which is less than the wall thickness D w of the carrier body 3 (FIG. Fig. 2b ).
  • the strip material 1 can also have a trapezoidal cross section ( Fig. 2 ).
  • the cutting elements 4 are fixed by sintering, soldering, laser welding, gluing o. The like., That the cutting elements 4 are supported on three sides by the strip material 1.
  • the strip material 1 is bent cylindrically with the cutting elements 4 into a drill bit, it can be provided with lateral notches 5 (see Fig. 3 to 5 ).
  • the strip material 1 can be tuned by varying various parameters, for example, on the field of use of the drill bit, on the processing method of the same or the band properties (eg elastic or plastic deformability, etc.). By choosing, for example, corresponding steel grades in conjunction with corresponding strip thicknesses, the plastic or elastic behavior of the strip material 1 can be adjusted. By the aforementioned notches 5, a strip material 1 which is difficult to deform per se can be modified such that it can easily be bent.
  • the Fig. 6 to 8 show an embodiment of the strip material 1 with both trapezoidal cross-section as well as notches 5.
  • a thinner strip material 1 to the thickness of the wall of the carrier body. 3 to be brought.
  • the strip properties can be adapted to the diverse requirements.
  • the individual cutting elements 4 are usually not deformable. In order for the stated principle to work, they should be designed so that all diameters of the drill bit can be covered with one cutting element length and shape. This is achieved by making them much shorter than before. As a result, they adapt optimally to the radius of the drill bit to be produced.
  • the lengths of the cutting elements 4 should be only about 3 to 5 mm. Depending on the type of drill bit, lengths of up to approx. 10 mm would also be possible.
  • the stocked with cutting elements 4 strip material 1 ( Fig. 12a ) is then bent to any diameter ( Fig. 12b and 12c ). If necessary, the strip material 1 with the cutting elements 4 can be automatically cut to length, bent and joined together to form a ring, ie, welded to the abutting edges, for example.
  • the resulting drill bit is then simply placed on the carrier body 3 (FIG. Fig. 2a-c ) of any diameter placed by soldering, laser welding, gluing or positive locking, for example, by the embodiment according to Fig. 9 is reached, where the stocked strip material 1 with a gradation 8 positively secured in a complementary gradation 9 of the support body 3.
  • such a combination could also be used, for example, as a band saw or gang saw.

Abstract

The drilling crown production process involves cutting slots (2) in the straight piece of strip material (1); fitting and fixing cutting elements in the slots; cutting the strip material to length and bending it to shape to form of a cylindrical drilling head of the required diameter, and welding the ends together. The drilling head is then fixed to the annular end face of the carrier body.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer Bohrkrone nach dem Oberbegriff des Patentanspruchs 1. Ein solches Verfahren ist der US 4 667 755 zu entnehmen.The invention relates to a method for producing a drill bit according to the preamble of claim 1. Such a method is the US 4,667,755 refer to.

Bohrkronen für Bohrungen im Baubereich, d.h. in Beton, Mauerwerk, Asphalt, Natursteine oder im Bereich Bergbau, Straßenbau usw., bestehen aus einem Bohrkronenrohr als Trägerkörper mit einem Anschlussbauteil zum Verbinden mit einem Bohrantrieb (Bohrmaschine oder Bohrmotor) und aus am Bohrkronenrohr angebrachten Schneidelementen (Segmente oder Segmentringe) z.B. aus in einer Metallsintermatrix gebundenen Diamanten.Drill bits for drilling in the construction sector, i. in concrete, masonry, asphalt, natural stones or mining, road construction, etc., consist of a drill bit tube as a carrier body with a connection component for connection to a drill drive (drill or drill motor) and from the drill bit tube mounted cutting elements (segments or segment rings). of diamonds bound in a metal sinter matrix.

Die Schneidelemente weisen in der Regel Breiten von ca. 3,0 bis 6,0 mm auf. Die Breite ist vom Durchmesser der Bohrkrone und von der Leistung des verwendeten Bohrantriebs abhängig. Bei hohen Antriebsleistungen und großen Durchmessern müssen aus Gründen der Haltbarkeit und Stabilität Bohrkronenrohre (Trägerkörper) mit größeren Wanddicken und dementsprechend breitere Schneidelemente eingesetzt werden.The cutting elements generally have widths of about 3.0 to 6.0 mm. The width depends on the diameter of the drill bit and the power of the drill drive used. For reasons of durability and stability, drill bits (support body) with larger wall thicknesses and correspondingly wider cutting elements must be used for high drive capacities and large diameters.

Die Höhe des Überstandes der Schneidelemente in Axialrichtung beträgt maximal ca. 10 mm. Größere Höhen sind nur in wenigen speziellen Fällen verwendbar, da mit steigender Höhe die Gefahr von Abrissen der Schneidelemente oder von Instabilitäten stark zunimmt.The height of the projection of the cutting elements in the axial direction is a maximum of about 10 mm. Larger heights are usable only in a few special cases, since with increasing height, the risk of tearing of the cutting elements or instabilities greatly increases.

Die Abmessungen der Schneidelemente in Umfangsrichtung der Bohrkrone beträgt in der Regel ca. 10 bis 25 mm. Kürzere Schneidelemente sind aus Stabilitätsgründen, längere Schneidelemente aus fertigungstechnischen und geometrischen Gründen sehr ungünstig.The dimensions of the cutting elements in the circumferential direction of the drill bit is usually about 10 to 25 mm. Shorter cutting elements are very unfavorable for stability reasons, longer cutting elements for manufacturing and geometric reasons.

Die Schneidelemente werden in der Regel auf den Einsatzzweck optimiert z.B. durch die Wahl entsprechender Metallpulver- Legierungen für die Sintermatrix (Härte, Diamantbindung, Abnutzungsverhalten usw.), der darin eingebetteten Diamanten (Konzentration, Qualität, Kristallinität, Größe, Bruchverhalten usw.) und der Herstellungsparameter (Temperatur, Druck, Zeit usw.).The cutting elements are usually optimized for the purpose, e.g. by the choice of appropriate metal powder alloys for the sinter matrix (hardness, diamond bond, wear behavior, etc.), the diamonds embedded therein (concentration, quality, crystallinity, size, fracture behavior, etc.) and the manufacturing parameters (temperature, pressure, time, etc.).

Diese Schneidelemente werden als Einzelelemente in Serie oder als Mehrfachelemente in Serie, von denen Einzelelemente abgetrennt werden, hergestellt und manuell oder automatisch auf das plan geschliffene Bohrkronenrohr aufgelötet oder lasergeschweißt.These cutting elements are produced as individual elements in series or as multiple elements in series, from which individual elements are separated, and manually or automatically soldered or laser welded to the plan ground drill core tube.

Der Erfindung liegt die Aufgabe zugrunde, die Anzahl der im Einsatz befindlichen Schneidelemente bei gleichzeitiger stabiler Befestigung der Schneidelemente auf der Bohrkrone zu erhöhen, ohne gleichzeitig die Schneidelementenfläche zu erhöhen, wobei damit auch der Produktionsaufwand für die Herstellung der Schneidelemente verringert werden soll, und zwar insofern, als nur noch eine Schneidelementgröße für eine Vielzahl von Bohrkronen-Durchmessern gebraucht wird. Es soll also eine generelle Eignung für praktisch alle gängigen Bohrkronen-Durchmesser erreicht werden, so daß eine einfache maschinelle oder manuelle Fertigung ermöglicht wird, wobei unter Berücksichtigung der Bohrkronenstabilität auch die Breite der Schneidelemente und/oder die Bohrkronen-Wandstärke verringert werden kann, so daß die Herstellung von Bohrkronen mit geringeren Schnittbreiten möglich ist.The invention has for its object to increase the number of cutting elements used in the simultaneous stable attachment of the cutting elements on the drill bit without simultaneously increasing the cutting element surface, thereby also the production cost for the production of the cutting elements to be reduced, in so far when only one cutting element size is needed for a variety of drill bit diameters. So it is a general suitability for virtually all common drill bits diameter can be achieved, so that a simple mechanical or manual production is possible, taking into account the Bohrkronenstabilität and the width of the cutting elements and / or the Bohrkronen wall thickness can be reduced, so that the production of drill bits with smaller cutting widths is possible.

Diese Aufgabe wird erfindungsgemäß durch ein Verfahren zur Herstellung einer Bohrkrone gemäß dem Patentanspruch 1 gelöst.This object is achieved by a method for producing a drill bit according to claim 1.

Zweckmäßige Weiterbildungen des erfindungsgemäßen Verfahrens sind in den Unteransprüchen gekennzeichnet.Advantageous developments of the method according to the invention are characterized in the subclaims.

Die Bohrkrone und deren erfindungsgemäßes Herstellungsverfahren sollen nunmehr mit Bezug auf die teils schematischen Zeichnungen näher erläutert werden. Dabei zeigt bzw. zeigen die

Fig. 1a bis 1c
in Seitenansicht jeweils ein Stück des Bandmaterials mit unterschiedlichen Schlitzen, die
Fig. 2a bis 2c
jeweils Querschnitte oder Frontansichten der Trägerkörperwandung mit Ausführungsbeispielen für das Bandmaterial und die Schneidelemente,
Fig. 3
eine Seitenansicht einer abgewandelten Ausführungsform des Bandmaterials,
Fig. 4
eine Stirnansicht des Bandmaterials nach Fig. 3,
Fig. 5
eine Draufsicht auf das Bandmaterial nach Fig. 3 und 4,
Fig. 6
eine weitere Ausführungsform des Bandmaterials in Seitenansicht,
Fig. 7
das Bandmaterial nach Fig. 6 als Stirnansicht,
Fig. 8
das Bandmaterial nach Fig. 6 und 7 in Draufsicht,
Fig. 9
eine alternative Art der Befestigung des Bandmaterials am Trägerkörper,
Fig. 10
eine weitere Ausführungsform des Bandmaterials als Sandwichaufbau in Draufsicht,
Fig. 11
die Stirnansicht des Bandmaterials nach Fig. 10 und die
Fig. 12a bis 12c
schematisch das mit Schneidelementen bestückte Bandmaterial gestreckt und in zwei unterschiedliche Radien gebogen.
The drill bit and its inventive manufacturing method will now be explained in more detail with reference to the partially schematic drawings. This shows or show the
Fig. 1a to 1c
in side view each one piece of the strip material with different slots, the
Fig. 2a to 2c
each cross-sections or front views of the carrier body wall with embodiments of the strip material and the cutting elements,
Fig. 3
a side view of a modified embodiment of the strip material,
Fig. 4
an end view of the strip material after Fig. 3 .
Fig. 5
a plan view of the strip material after 3 and 4 .
Fig. 6
a further embodiment of the strip material in side view,
Fig. 7
the band material after Fig. 6 as an end view,
Fig. 8
the band material after 6 and 7 in plan view,
Fig. 9
an alternative way of fastening the strip material to the carrier body,
Fig. 10
a further embodiment of the strip material as sandwich construction in plan view,
Fig. 11
the front view of the strip material after Fig. 10 and the
Fig. 12a to 12c
schematically stretched equipped with cutting elements strip material and bent into two different radii.

In der nachfolgenden Beschreibung werden für die gleichen Teile, welche die gleiche Funktion haben, die gleichen Bezugszeichen verwendet, auch wenn diese Teile eine andere Form oder Anordnung haben.In the following description, the same reference numerals will be used for the same parts having the same function, even if these parts have a different shape or arrangement.

Im Gegensatz zum Stand der Technik, nach dem die Schneidelemente einzeln hergestellt und auf den Trägerkörper direkt aufgelötet oder aufgeschweißt werden, wird nach der Erfindung zunächst ein gradliniges Bandmaterial 1, beispielsweise wie in den Fig. 1a bis 1c dargestellt, verwendet, aus dem Schlitze 2 beispielsweise ausgestanzt oder mit Laser ausgeschnitten werden. In Fig. 1a sind die Schlitze 2 relativ schmal und haben einen relativ geringen Abstand voneinander. Nach Fig. 1b sind die Schlitze 2 leicht schräg angeordnet, und nach Fig. 1c sind die Schlitze 2 größer und haben einen gegenüber Fig. 1a größeren Abstand voneinander. Das Bandmaterial 1 kann aus Stahl, anderen Verbundwerkstoffen oder Metall-Legierungen bestehen. Im einfachsten Fall besteht es aus dem gleichen Material wie der Trägerkörper 3 (siehe z.B. Fig. 2a bis 2c).In contrast to the prior art, according to which the cutting elements are produced individually and directly soldered or welded onto the carrier body, according to the invention, first a straight strip material 1, for example as in Fig. 1a to 1c represented, used, for example, punched out of the slots 2 or cut out by laser. In Fig. 1a the slots 2 are relatively narrow and have a relatively small distance from each other. To Fig. 1b the slots 2 are slightly inclined, and after Fig. 1c the slots 2 are larger and have one opposite Fig. 1a greater distance from each other. The strip material 1 may consist of steel, other composites or metal alloys. In the simplest case, it consists of the same material as the carrier body 3 (see, eg Fig. 2a to 2c ).

Schneidelemente 4 werden an drei Seiten nach üblichen Verfahren am Bandmaterial 1 befestigt, und da die Befestigung am Trägerkörper 3 (Bohrkronenrohr) nicht nur über den Fuß des Schneidelementes 4 erfolgt, kann das Bandmaterial 1 bei gleicher stabiler Befestigung der Schneidelemente 4 nicht nur eine Dicke DB gleich der Wanddicke Dw der rohrförmigen Trägerkörpers 3 haben (Fig. 2a), sondern auch eine Dicke dB, die geringer ist als die Wanddicke Dw des Trägerkörpers 3 (Fig. 2b). Das Bandmaterial 1 kann auch einen trapezförmigen Querschnitt haben (Fig. 2).Cutting elements 4 are fixed on three sides by conventional methods on the strip material 1, and since the attachment to the support body 3 (drill bit tube) is not only on the foot of the cutting element 4, the strip material 1 with the same stable attachment of the cutting elements 4 not only a thickness D. B equal to the wall thickness D w of the tubular support body 3 ( Fig. 2a ), but also a thickness d B which is less than the wall thickness D w of the carrier body 3 (FIG. Fig. 2b ). The strip material 1 can also have a trapezoidal cross section ( Fig. 2 ).

In den Schlitzen 2 des Bandmaterials 1 werden die Schneidelemente 4 durch Aufsintern, Löten, Laserschweißen, Kleben o. dgl. so befestigt, daß die Schneidelemente 4 an drei Seiten durch das Bandmaterial 1 gestützt werden.In the slots 2 of the strip material 1, the cutting elements 4 are fixed by sintering, soldering, laser welding, gluing o. The like., That the cutting elements 4 are supported on three sides by the strip material 1.

Da das Bandmaterial 1 mit den Schneidelementen 4 zu einer Bohrkrone zylindrisch gebogen wird, kann es mit seitlichen Einkerbungen 5 versehen werden (siehe Fig. 3 bis 5).Since the strip material 1 is bent cylindrically with the cutting elements 4 into a drill bit, it can be provided with lateral notches 5 (see Fig. 3 to 5 ).

Das Bandmaterial 1 kann durch Variation verschiedener Parameter z.B. auf das Einsatzgebiet der Bohrkrone, auf die Verarbeitungsweise desselben oder die Bandeigenschaften (z.B. elastische oder plastische Verformbarkeit u.s.w.) abgestimmt werden. Durch die Wahl z.B. entsprechender Stahlsorten in Verbindung mit entsprechenden Banddicken kann das plastische bzw. elastische Verhalten des Bandmaterials 1 eingestellt werden. Durch die vorerwähnten Einkerbungen 5 kann ein an sich nur schwer verformbares Bandmaterial 1 so modifiziert werden, daß es leicht gebogen werden kann. Die Fig. 6 bis 8 zeigen eine Ausführungsform des Bandmaterial 1 mit sowohl trapezförmigem Querschnitt als auch Einkerbungen 5.The strip material 1 can be tuned by varying various parameters, for example, on the field of use of the drill bit, on the processing method of the same or the band properties (eg elastic or plastic deformability, etc.). By choosing, for example, corresponding steel grades in conjunction with corresponding strip thicknesses, the plastic or elastic behavior of the strip material 1 can be adjusted. By the aforementioned notches 5, a strip material 1 which is difficult to deform per se can be modified such that it can easily be bent. The Fig. 6 to 8 show an embodiment of the strip material 1 with both trapezoidal cross-section as well as notches 5.

Es ist auch möglich, durch einen Sandwichaufbau nach Fig. 10 und 11 die Verformbarkeit des Bandmaterials 1 zu beeinflussen, wobei der Sandwichaufbau harte Bandseiten 6 und einen elastischen Kern 7 aufweist.It is also possible by a sandwich construction after 10 and 11 to influence the deformability of the strip material 1, wherein the sandwich construction has hard hinge sides 6 and an elastic core 7.

Bei der Ausführungsform nach Fig. 2c bzw. Fig. 6 bis 8 (Trapezquerschnitt) kann ein dünneres Bandmaterial 1 auf die Dicke der Wandung des Trägerkörpers 3 gebracht werden. Durch die Variation von Werkstoff des Bandmaterials 1, von dessen Aufbau, Stärke und Geometrie können die Bandeigenschaften den vielfältigen Anforderungen angepasst werden.In the embodiment according to Fig. 2c respectively. Fig. 6 to 8 (Trapezoidal cross-section), a thinner strip material 1 to the thickness of the wall of the carrier body. 3 to be brought. By varying the material of the strip material 1, its structure, strength and geometry, the strip properties can be adapted to the diverse requirements.

Die einzelnen Schneidelemente 4 sind in der Regel nicht verformbar. Damit das dargelegte Prinzip funktioniert, sind sie so zu gestalten, daß mit einer Schneidelementlänge und -form alle Durchmesser der Bohrkrone abgedeckt werden können. Dies wird dadurch erreicht, daß sie viel kürzer als bisher gestaltet werden. Dadurch passen sie sich dem Radius der herzustellen Bohrkrone optimal an. Die Längen der Schneidelemente 4 sollen nur ca. 3 bis 5 mm betragen. Je nach Bohrkronentyp wären auch Längen bis ca. 10 mm möglich.The individual cutting elements 4 are usually not deformable. In order for the stated principle to work, they should be designed so that all diameters of the drill bit can be covered with one cutting element length and shape. This is achieved by making them much shorter than before. As a result, they adapt optimally to the radius of the drill bit to be produced. The lengths of the cutting elements 4 should be only about 3 to 5 mm. Depending on the type of drill bit, lengths of up to approx. 10 mm would also be possible.

Das mit Schneidelementen 4 bestückte Bandmaterial 1 (Fig. 12a) wird dann auf beliebige Durchmesser gebogen (Fig. 12b und 12c). Das Bandmaterial 1 mit den Schneidelementen 4 kann ggf. automatisch abgelängt, gebogen und zu einem Ring zusammengefügt, d.h. an den Stoßkanten z.B. verschweißt werden. Die so entstandene Bohrkrone wird dann einfach auf den Trägerkörper 3 (Fig. 2a-c) beliebigen Durchmessers aufgesetzt durch Löten, Laserschweißen, Kleben oder Formschluss, der z.B. durch die Ausführungsform nach Fig. 9 erreicht wird, wo das bestückte Bandmaterial 1 mit einer Abstufung 8 formschlüssig in einer dazu komplementären Abstufung 9 des Trägerkörpers 3 befestigt wird.The stocked with cutting elements 4 strip material 1 ( Fig. 12a ) is then bent to any diameter ( Fig. 12b and 12c ). If necessary, the strip material 1 with the cutting elements 4 can be automatically cut to length, bent and joined together to form a ring, ie, welded to the abutting edges, for example. The resulting drill bit is then simply placed on the carrier body 3 (FIG. Fig. 2a-c ) of any diameter placed by soldering, laser welding, gluing or positive locking, for example, by the embodiment according to Fig. 9 is reached, where the stocked strip material 1 with a gradation 8 positively secured in a complementary gradation 9 of the support body 3.

Alternativ, aber nicht erfindungsgemäß, könnte je nach Ausgestaltung des Bandmaterials 1 und der Schneidelemente 4 eine solche Kombination auch z.B. als Band- oder Gattersäge Verwendung finden.Alternatively, but not according to the invention, depending on the design of the strip material 1 and the cutting elements 4, such a combination could also be used, for example, as a band saw or gang saw.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Bandmaterialband material
22
Schlitze in 1Slits in 1
33
Trägerkörpersupport body
44
SchneidelernenteCutting learning duck
55
Einkerbungennotches
66
Bandseitenband pages
77
Kerncore
88th
Abstufung an 1Gradation at 1
99
Abstufung an 3Grading on 3
DB D B
Dicke von 1Thickness of 1
dB d B
geringere Dicke von 1smaller thickness of 1
Dw D w
Wanddicke von 3Wall thickness of 3

Claims (9)

  1. Method for producing a core drill bit, consisting of a drill bit stem as a core with a connecting component for attaching to an auger drive, and cutting units, characterised by the following steps:
    a) cutting slots (2) in the un-bent parent material (1);
    b) setting and fixing cutting units (4) in the parent material or the slots (2) thereof;
    c) trimming and bending the parent material (1) fitted with cutting units (4) to form a cylindrical drill head of the desired diameter and welding the edges;
    d) fixing the drill head manufactured in step c) onto the circular end plane of the core (3).
  2. Method according to claim 1, characterised by the slots (2) being stamped out of the unbent parent material (1).
  3. Method according to claim 1, characterised by the slots (2) being cut out of the unbent parent material (1) using a laser.
  4. Method according to claims 1 to 3, characterised by the parent material (1) used having a rectangular cross section and a thickness (DB) the same as or greater than the wall thickness (DW) of the tubular core (3).
  5. Method according to claims 1 to 3, characterised by the parent material (1) used having a rectangular cross section and a thickness (DB) less than the wall thickness (DW) of the tubular core (3).
  6. Method according to claims 1 to 3, characterised by the parent material (1) used having a trapezoid cross section, the parallel surfaces of which having the same wall thickness (DW) as that of the tubular core (3).
  7. Method according to claims 1 to 6, characterised by the parent material (1) having one or both sides covered with notches (5).
  8. Method according to claims 1 to 7, characterised by the use of a sandwich construction (6, 7) for the parent material (1).
  9. Method according to claims 1 to 8, characterised by the parent material (1) being attached via a gradation (8) with a positive fit to a complementary gradation (9) in the core (3).
EP05022545A 2004-10-27 2005-10-15 Method for manufacturing a core drill Not-in-force EP1652643B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004052125A DE102004052125B3 (en) 2004-10-27 2004-10-27 Production process for drilling crown involves cutting slots in straight strip material, fitting cutting elements in slots, and cutting strip to length and bending it to form crown

Publications (2)

Publication Number Publication Date
EP1652643A1 EP1652643A1 (en) 2006-05-03
EP1652643B1 true EP1652643B1 (en) 2009-08-05

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EP05022545A Not-in-force EP1652643B1 (en) 2004-10-27 2005-10-15 Method for manufacturing a core drill

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EP (1) EP1652643B1 (en)
AT (1) ATE438492T1 (en)
DE (2) DE102004052125B3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007018791B3 (en) * 2007-04-20 2008-08-14 Atlas Diamant Werkzeuge Gmbh Making strip connecting cutting segments, used to manufacture core-drilling bit, lays metal strip in sintering mold, adds green molded cutters and completes sintering and bonding in single firing
EP3501706A1 (en) * 2017-12-21 2019-06-26 HILTI Aktiengesellschaft Method for producing a cutting section for a core bit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999620A (en) * 1975-05-30 1976-12-28 Watson, Incorporated Core barrel
DE3407427A1 (en) * 1984-02-29 1985-08-29 Hawera Probst Gmbh + Co, 7980 Ravensburg DRILL BIT
GB8717675D0 (en) * 1987-07-25 1987-09-03 Diamant Boart Ltd Abrasive tool
FR2786122B1 (en) * 1998-11-19 2001-07-27 Legrand Sa TWO-LEVEL HOLE SAW FOR SHAPING HOUSING IN A DRY PARTITION
DE10253247B3 (en) * 2002-11-15 2004-01-29 Gerhard Feustle drill bit

Also Published As

Publication number Publication date
ATE438492T1 (en) 2009-08-15
EP1652643A1 (en) 2006-05-03
DE102004052125B3 (en) 2006-02-16
DE502005007833D1 (en) 2009-09-17

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