EP1182324B1 - Diamond drill bit - Google Patents
Diamond drill bit Download PDFInfo
- Publication number
- EP1182324B1 EP1182324B1 EP01810780A EP01810780A EP1182324B1 EP 1182324 B1 EP1182324 B1 EP 1182324B1 EP 01810780 A EP01810780 A EP 01810780A EP 01810780 A EP01810780 A EP 01810780A EP 1182324 B1 EP1182324 B1 EP 1182324B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carrier
- carrier body
- wall thickness
- fact
- tubular
- 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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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
-
- 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
- E21B10/02—Core bits
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49373—Tube joint and tube plate structure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49391—Tube making or reforming
Definitions
- the invention relates to a base body for a diamond drill bit according to the preamble of claim 1
- Diamond core bits are used for making holes with a large diameter in a hard ground such as concrete, rock or the like.
- Diamond core bits consist of a base body, which at its borehole side End face is provided with at least a single diamond cutting element.
- the Grundköper itself consists of a tubular support body with a bottom and a shank end together. The soil is located at one opposite to the drilling direction pointing free end of the support body and extends substantially perpendicular to the drilling direction. The insertion end protrudes in a direction opposite to the drilling direction Direction from the ground.
- the known from DE-3603499 basic body for a diamond drill bit is made of three individual parts, a cylindrical insertion end, a tubular support body and a floor made. All three parts are connected by welding.
- the tubular carrier body is for example by a machining brought to its final shape and has a smooth surface both an inside as well as on an outside.
- a machining brought to its final shape has a smooth surface both an inside as well as on an outside.
- diamond cutting element Side can be an increased friction between the smooth surface of the tubular support body and the substrate arise, which adversely affects the quality of a hole to be produced.
- the smooth surfaces also have the disadvantage that these removed cuttings do not from a drilled annular gap in the underground can transport.
- the invention has for its object to a basic body for diamond drill bits create, which is economically producible, a low weight, a small wall thickness and has good concentricity properties.
- cleared cuttings should be removed be well transportable a drilled annular gap of a subsoil.
- the spin forming has the advantage that the entire body of a single Material exists and that for the production of the body very little Machining operations are necessary. This particularly affects the amount of Production costs of the carrier body positive.
- the carrier body has a runout of less than 1.3 mm.
- a low runout is only by the flow-forming process achievable, in which the material to be formed uniformly from the spinning rollers is displaced.
- the one piece with the tubular carrier body lends Trained bottom of the support body high radial strength, so this For example, during transport due to improper handling not deformed becomes.
- the radial extent of the free end attachable to the drilling direction side Cutting element is only slightly larger than the wall thickness of the tubular Carrier body occurs, especially with increasing wear of the cutting element, to a friction between the tubular portion of the carrier body and the underground. This friction leads to a warming of the entire body and to a greater load of the drive of the body serving Drive motor of a drill to be brought into contact with the main body.
- a profiling preferably on the inside and / or outside of the tubular portion of the support body is arranged, which can be with the ground Reduce contact surface of the carrier body coming into contact. A increased friction between the carrier body and the substrate can in this way be avoided.
- the profiling also has the advantage that this the Function of reinforcing ribs, which in addition to the strength of tubular portion of the support body positively affect.
- the main body points in the area the profiling, for example, a wall thickness, the maximum of 0.03 times Outer diameter of the carrier body corresponds.
- This big joining zone is achieved by the wall thickness of the carrier body preferably to Bohrhrungsungs remedyen, extended free end of Sukörpes out.
- This extension of the carrier body results For example, by a radial extension of the outer contour of the carrier body and extends over part of the total length of the carrier body.
- a big Joining zone can for example also be created by this Extension on the outside and the inside or only on the inside of the Carrier body extends. If the extension is on the inside, it reduces Of course, the clear width of the tubular support body on the drilling direction side free end.
- the wall thickness of the carrier body corresponds to the free borehole direction side End, for example, 0.012 to 0.014 times, outside the extended range measured outside diameter of the carrier body.
- this extension extends advantageously over a length corresponding to 0.04 to 0.14 times the total length of the carrier body.
- the carrier body In order to give the support body a particularly high stability, is the bottom the carrier body preferably bell-shaped.
- the main body is For example, formed from a metal, which is good with the help of the flow-forming deform.
- Fig. 1 shows a turned, cast or formed by machining blank with a raw insertion end 1 and a raw body 2.
- the Blank is free of play with a, from a main spindle of a flow-forming device, not shown recorded, spin-mandrel 3 brought into connection.
- This in Fig. 2 for example, has a cylindrical outer contour and presses against the direction of drilling against a facing in the direction of drilling end face of the unprocessed basic body 2.
- counter-holding force is the insertion in fixed in the axial direction and by a main drive of the flow-forming device in rotary motion added.
- Corresponding symbols that indicate a rotational movement are the Fig. 3 removable.
- Two pressure rollers 5, 6 of the flow-forming device have a Drilling direction tapered outer contour. During the flow-forming process, a Displacement of the rotating pressure rollers 5, 6 in the drilling direction. They grab the, along guided two unillustrated axes, pressure rollers 5, 6 locally on the circumference of the unprocessed carrier body 3 a. This is revealed in Fig. 3.
- the material of the support body 2 is plastic deformed and partially displaced in the drilling direction along the spinning mandrel 3, so that the carrier body 3 receives its tubular shape.
- the defined movement of the spinning rollers 5, 6 causes the carrier body 2 forming portion of the blank on the Required wall thickness is reduced and brought to the desired length.
- the wall thickness of the carrier body 2 increases to the drilling direction-side free end of the Carrier body 2 towards, so that at least one not shown diamane cutting element can be set well on the carrier body 2.
- the extension 8 of the carrier body 2 results from a radial extension of the outer contour of the support body 2 and extends over a length measured parallel to the drilling direction, that of the 0.04- to 0.14 times the total length of the support body 2 corresponds.
- the wall thickness of the carrier body 2 at the drilling direction-side free end is 1.5 mm to 3.5 mm. Of the Bottom of the carrier body 2 may be bell-shaped.
- the insertion end 1, a longitudinal groove 7 at the insertion end 1 and the drilling direction side free end of the support body 2 are, as shown in FIG. 4, with the help of machined tools 9, 10 post-processed.
- Fig. 5 shows a base body with a tubular support body 12, which integrally with an insertion end 11 is connected.
- the insertion end 11 has a closed Longitudinal groove 17.
- the outside and the inside are with one example provided trapezoidal thread profiling.
Abstract
Description
Die Erfindung betrifft einen Grundkörper für eine Diamantbohrkrone gemäss dem Oberbegriff
des Patentanspruchs 1.The invention relates to a base body for a diamond drill bit according to the preamble
of
Zur Herstellung von Bohrungen mit einem grossen Durchmesser in einem harten Untergrund wie Beton, Gestein oder dergleichen, werden Diamantbohrkronen verwendet. Diese Diamantbohrkronen bestehen aus einem Grundkörper, der an seiner bohrrichtungseitigen Stirnseite mit wenigstens einem einzelnen Diamantschneidelement versehen ist. Der Grundköper selbst setzt sich aus einem rohrförmigen Trägerkörper mit einem Boden und einem Einsteckende zusammen. Der Boden befindet sich an einem entgegen der Bohrrichtung weisenden freien Ende des Trägerkörpers und erstreckt sich im wesentlichen senkrecht zur Bohrrichtung. Das Einsteckende ragt in einer von der Bohrrichtung entgegengesetzten Richtung von dem Boden ab.For making holes with a large diameter in a hard ground such as concrete, rock or the like, diamond core bits are used. These Diamond core bits consist of a base body, which at its borehole side End face is provided with at least a single diamond cutting element. Of the Grundköper itself consists of a tubular support body with a bottom and a shank end together. The soil is located at one opposite to the drilling direction pointing free end of the support body and extends substantially perpendicular to the drilling direction. The insertion end protrudes in a direction opposite to the drilling direction Direction from the ground.
Der aus der DE-3603499 bekannte Grundkörper für eine Diamantbohrkrone ist aus drei einzelnen Teilen, einem zylindrischen Einsteckende, einem rohrförmigen Trägerkörper und einem Boden gefertigt. Alle drei Teile sind durch Schweissen miteinander verbunden.The known from DE-3603499 basic body for a diamond drill bit is made of three individual parts, a cylindrical insertion end, a tubular support body and a floor made. All three parts are connected by welding.
Jedes dieser Teile wird einzeln gefertigt. Dabei fallen mehrere Bearbeitungsoperationen, wie das spanabhebende Bearbeiten und das Zusammenschweissen der einzelnen Teile, an. Diese Arbeitsoperationen wirken sich insgesamt äusserst negativ auf die Höhe der Herstellkosten aus. Werden diese Teile auch noch an unterschiedlichen Standorten produziert, so kommen zusätzlich Kosten für Transport und Handling hinzu. Zu weiteren Nachteilen dieses bekannten Grundkörpers zählt ein ungenauer Rundlauf des rohrförmigen Trägerkörpers dessen Ursache im Transport des Trägerkörpers liegen kann, wenn beispielsweise das Transportgut - die Grundkörper - eine unsachgemässe Behandlung erfahren, bei der eine radiale Belastung auf den Trägerkörper einwirkt. Es kann aber auch sein, dass sich rohrförmige Trägerkörper mit einem grossen Durchmesser beim Transport durch starke Erschütterungen in radialer Richtung verformen, so dass der Querschnitt des Trägerkörpers anschliessend von einer kreisrunden Form abweicht. Each of these parts is manufactured individually. There are several machining operations, like the machining and the welding together of the parts, at. These work operations have an extremely negative effect on the amount of Production costs. These parts are still in different locations produced, additional costs for transport and handling are added. To further Disadvantages of this known basic body counts an inaccurate concentricity of the tubular Carrier body whose cause may lie in the transport of the carrier body, if, for example, the transported goods - the basic body - are improper Experience treatment in which a radial load acts on the carrier body. It but can also be that tubular carrier body with a large diameter deform during transport by strong vibrations in the radial direction, so that the Cross section of the carrier body then deviates from a circular shape.
Der rohrförmige Trägerkörper wird beispielsweise durch eine spanabhebende Bearbeitung auf seine endgültige Form gebracht und weist eine glatte Oberfläche sowohl an einer Innen- als auch an einer Aussenseite auf. Wenn beipielsweise ein an dem bohrrichtungsseitigen freien Ende des rohrförmigen Trägerkörpers angeordnetes Diamantschneidelement seitlich bereits teilweise abgenützt ist, kann eine erhöhte Reibung zwischen der glatten Oberfläche des rohrförmigen Trägerkörpers und dem Untergrund entstehen, die sich nachteilig auf die Qualität einer herzustellenden Bohrung auswirkt. Die glatten Oberflächen haben auch den Nachteil, dass diese abgetragenes Bohrklein nicht aus einem gebohrten Ringspalt im Untergrund transportieren können.The tubular carrier body is for example by a machining brought to its final shape and has a smooth surface both an inside as well as on an outside. For example, if one on the borehole side free end of the tubular support body arranged diamond cutting element Side is already partially worn, can be an increased friction between the smooth surface of the tubular support body and the substrate arise, which adversely affects the quality of a hole to be produced. The smooth surfaces also have the disadvantage that these removed cuttings do not from a drilled annular gap in the underground can transport.
Der Erfindung liegt die Aufgabe zugrunde, einen Grundkörper für Diamantbohrkronen zu schaffen, der wirtschaftlich herstellbar ist, ein geringes Gewicht, eine geringe Wandstärke und gute Rundlaufeigenschaften aufweist. Ausserdem soll abgetragenes Bohrklein aus einem gebohrten Ringspalt eines Untergrundes gut transportierbar sein.The invention has for its object to a basic body for diamond drill bits create, which is economically producible, a low weight, a small wall thickness and has good concentricity properties. In addition, cleared cuttings should be removed be well transportable a drilled annular gap of a subsoil.
Die Lösung dieser Aufgaben erfolgt mit einem Grundkörper, welcher die im kennzeichnenden
Abschnitt des Patentanspruchs 1 angeführten Merkmale aufweist.The solution of these tasks is carried out with a basic body, which in the characterizing
Having section of
Das Drückwalzen hat den Vorteil, dass der gesamte Grundkörper aus einem einzigen Werkstoff besteht und dass für die Herstellung des Grundkörpers nur sehr wenig Bearbeitungsoperationen notwendig sind. Dies wirkt sich insbesondere auf die Höhe der Herstellkosten des Trägerkörpers positiv aus.The spin forming has the advantage that the entire body of a single Material exists and that for the production of the body very little Machining operations are necessary. This particularly affects the amount of Production costs of the carrier body positive.
Mit Hilfe des Drückwalzverfahrens lassen sich rohrförmige Abschnitte mit einer sehr grossen Länge fertigen. Da der Werkstoff beim Drückwalzen kaltverfestigt wird, lässt sich eine sehr kleine Wandstärke realisieren, die vorzugsweise dem 0,008- bis 0,016-fachen Aussendurchmesser des Trägerkörpers entspricht. Trotz der geringen Wandstärke weist der Trägerkörper die für die Herstellung eines Bohrloches notwendige Festigkeit auf. Aufgrund dieser geringen Wandstärke ergibt sich auch eine Gewichtsreduktion, die insbesondere für einen Anwender spürbar ist, wenn er beispielsweise mit einem handgeführten Bohrgerät arbeitet.With the help of the flow-forming process can be tubular sections with a very great length. Since the material is work hardened during spin forming, can be realize a very small wall thickness, preferably 0.008 to 0.016 times Outer diameter of the carrier body corresponds. Despite the small wall thickness points the support body to the necessary for the production of a borehole strength. by virtue of This small wall thickness also results in a weight reduction, in particular is noticeable to a user when, for example, using a hand-held Drill works.
Zweckmässigerweise weist der Trägerkörper eine Rundlaufabweichung von weniger als 1,3 mm auf. Eine derartig geringe Rundlaufabweichung ist nur durch das Drückwalzverfahren erreichbar, bei dem der umzuformende Werkstoff gleichmässig von den Drückwalzen verdrängt wird. Ausserdem verleiht der einstückig mit dem rohrförmigen Trägerkörper ausgebildete Boden dem Trägerkörper eine hohe radiale Festigkeit, so dass dieser beispielsweise beim Transport aufgrund unsachgemässer Handhabungen nicht verformt wird.Conveniently, the carrier body has a runout of less than 1.3 mm. Such a low runout is only by the flow-forming process achievable, in which the material to be formed uniformly from the spinning rollers is displaced. In addition, the one piece with the tubular carrier body lends Trained bottom of the support body high radial strength, so this For example, during transport due to improper handling not deformed becomes.
Da die radiale Erstreckung des an dem bohrrichtungsseitgen freien Ende befestigbaren Schneidelementes nur geringfügig grösser ist als die Wandstärke des rohrförmigen Trägerkörpers kommt es, insbesondere bei zunehmender Abnützung des Schneidelementes, zu einer Reibung zwischen dem rohrförmigen Abschnitt des Trägerkörpers und dem Untergrund. Diese Reibung führt zu einer Erwärmung des gesamten Grundkörpers und zu einer grösseren Belastung des dem Antrieb des Grundkörpers dienenden Antriebsmotors eines mit dem Grundkörper in Verbindung bringbaren Bohrgerätes. Mit Hilfe einer Profilierung, die vorzugsweise an der Innenseite und/oder Aussenseite des rohrförmigen Abschnittes des Trägerkörpers angeordnet ist, lässt sich die mit dem Untergrund in Berührung kommende Berührungsfläche des Trägerkörpers reduzuieren. Eine erhöhte Reibung zwischen dem Trägerkörper und dem Untergrund kann auf diese Weise vermieden werden. Die Profilierung weist ausserdem den Vorteil auf, dass diesen die Funktion von Verstärkungsrippen zukommt, die sich zusätzlich auf die Festigkeit des rohrförmigen Abschnittes des Trägerkörpers positiv auswirken.Since the radial extent of the free end attachable to the drilling direction side Cutting element is only slightly larger than the wall thickness of the tubular Carrier body occurs, especially with increasing wear of the cutting element, to a friction between the tubular portion of the carrier body and the underground. This friction leads to a warming of the entire body and to a greater load of the drive of the body serving Drive motor of a drill to be brought into contact with the main body. With Help a profiling, preferably on the inside and / or outside of the tubular portion of the support body is arranged, which can be with the ground Reduce contact surface of the carrier body coming into contact. A increased friction between the carrier body and the substrate can in this way be avoided. The profiling also has the advantage that this the Function of reinforcing ribs, which in addition to the strength of tubular portion of the support body positively affect.
Die Anordnung einer Profilierung an der Innen- und/oder Aussenseite des rohrförmigen Trägerkörpers, die zweckmässigerweise spiralförmig ausgebildet ist, bringt den Vorteil mit sich, dass abgetragenes Bohrklein aus einem in den Untergrund gebohrten Ringspalt gut an die Oberfläche des Untergrundes transportierbar ist. Der Grundkörper weist im Bereich der Profilierung beispielsweise eine Wandstärke auf, die höchstens dem 0,03-fachen Aussendurchmesser des Trägerkörpers entspricht.The arrangement of a profiling on the inner and / or outer side of the tubular Carrier body, which is advantageously formed spirally, brings with it the advantage well, that the removed drill cuttings from an annular gap drilled into the subsurface are good can be transported to the surface of the ground. The main body points in the area the profiling, for example, a wall thickness, the maximum of 0.03 times Outer diameter of the carrier body corresponds.
Damit an dem bohrrichtungsseitigen freien Ende des Trägerkörpers wenigstens ein Diamantschneidelement, beispielsweise durch Löten oder Schweissen festlegbar ist, wird eine entsprechend grosse Fügezone benötigt. Diese grosse Fügezone wird erreicht, indem sich die Wandstärke des Trägerkörpers vorzugsweise zum bohrrichtungsseitigen, freien Ende des Trägerkörpes hin erweitert. Diese Erweiterung des Trägerkörpers ergibt sich beispielsweise durch eine radiale Erweiterung der Aussenkontur des Trägerkörpers und erstreckt sich über einen Teil der Gesamtlänge des Trägerkörpers. Eine grosse Fügezone kann beispielsweise auch dadurch geschaffen werden, indem sich diese Erweiterung an der Aussenseite und der Innenseite oder nur an der Innenseite des Trägerkörpers erstreckt. Befindet sich die Erweiterung an der Innenseite, so reduziert sich natürlich die lichte Weite des rohrförmigen Trägerkörpers an dem bohrrichtungsseitigen freien Ende. So that at the drilling direction-side free end of the carrier body at least one Diamond cutting element, for example by soldering or welding can be fixed, is a correspondingly large joining zone needed. This big joining zone is achieved by the wall thickness of the carrier body preferably to Bohrhrungsungsseitigen, extended free end of Trägerkörpes out. This extension of the carrier body results For example, by a radial extension of the outer contour of the carrier body and extends over part of the total length of the carrier body. A big Joining zone can for example also be created by this Extension on the outside and the inside or only on the inside of the Carrier body extends. If the extension is on the inside, it reduces Of course, the clear width of the tubular support body on the drilling direction side free end.
Die Wandstärke des Trägerkörpers entspricht an dessen bohrrichtungsseitigen freien Ende beispielsweise dem 0,012- bis 0,014-fachen, ausserhalb des erweiterten Bereiches gemessenen Aussendurchmesser des Trägerkörpers.The wall thickness of the carrier body corresponds to the free borehole direction side End, for example, 0.012 to 0.014 times, outside the extended range measured outside diameter of the carrier body.
Zur Erzielung eines, sich auf die Abfuhr des Bohrkleins nicht negativ auswirkenden, wesentlichen gleichmässigen Überganges, zwischen dem rohrförmigen Abschnitt und der Erweiterung des Trägerkörpers, erstreckt sich diese Erweiterung vorteilhafterweise über eine Länge, die der 0,04- bis 0,14-fachen Gesamtlänge des Trägerkörpers entspricht.To achieve a non-negative effect on the removal of the cuttings, substantially uniform transition, between the tubular portion and the Extension of the carrier body, this extension extends advantageously over a length corresponding to 0.04 to 0.14 times the total length of the carrier body.
Um dem Trägerkörper eine besonders hohe Stabilität verleihen zu können, ist der Boden des Trägerkörpers vorzugsweise glockenförmig ausgebildet. Der Grundkörper ist beispielsweise aus einem Metall gebildet, das sich mit Hilfe des Drückwalzverfahrens gut verformen lässt.In order to give the support body a particularly high stability, is the bottom the carrier body preferably bell-shaped. The main body is For example, formed from a metal, which is good with the help of the flow-forming deform.
Die Erfindung wird anhand von Zeichnungen, die ein Ausführungsbeispiel wiedergeben, näher erläutert. Es zeigen:
- Fig.1
- ein Rohteil aus dem der erfindungsgemässe Grundkörper fertigbar ist;
- Fig. 2
- das Rohteil gemäss Fig. 1 in Verbindung mit einem Drückwalzdorn;
- Fig. 3
- Herstellung des rohrförmigen Trägerkörpers aus einem Teil des Rohteiles gemäss Fig. 1 mit Hilfe mehrere Drückwalzen;
- Fig. 4
- spannabhebende Bearbeitung des Einsteckendes und des bohrrichtungsseitigen freien Endes des Trägerkörpers;
- Fig. 5
- ein weiterer erfindungsgemässer Grundkörper, dessen Trägerkörper an einer Innen- und Aussenseite mit einer Profilierung versehen ist.
- Fig.1
- a blank from which the basic body according to the invention can be manufactured;
- Fig. 2
- the blank according to FIG. 1 in conjunction with a pressure-rolling mandrel;
- Fig. 3
- Production of the tubular support body from a part of the blank according to FIG. 1 with the aid of several flow-forming rolls;
- Fig. 4
- tensioning machining of the insertion end and the drilling direction-side free end of the carrier body;
- Fig. 5
- Another inventive body, the carrier body is provided on an inner and outer side with a profiling.
Die Fig. 1 zeigt ein gedrehtes, gegossenes oder umformtechnisch hergestelltes Rohteil
mit einem unbearbeiteten Einsteckende 1 und einem unbearbeiteten Grundkörper 2. Das
Rohteil wird spielfrei mit einem, von einer Hauptspindel einer nicht dargestellten Drückwalzvorrichtung
aufgenommenen, Drückwalzdorn 3 in Verbindung gebracht. Dieser in Fig.
2 dargestellte Drückwalzdorn 3 weist beispielsweise eine zylindrische Aussenkontur auf
und drückt entgegen der Bohrrichtung gegen eine in Bohrrichtung weisende Stirnseite des
unbearbeiteten Grundkörpers 2.Fig. 1 shows a turned, cast or formed by machining blank
with a
Mittels einer ebenfalls nicht angedeuteten Gegenhaltekraft wird das Einsteckende in
axialer Richtung fixiert und von einem Hauptantrieb der Drückwalzvorrichtung in Drehbewegung
versetzt. Entsprechende Symbole, die eine Drehbewegung andeuten, sind der
Fig. 3 entnehmbar. Zwei Drückwalzen 5, 6 der Drückwalzvorrichtung besitzen eine sich in
Bohrrichtung kegelförmig verjüngende Aussenkontur. Beim Drückwalzvorgang erfolgt eine
Versetzung der sich drehenden Drückwalzen 5, 6 in Bohrrichtung. Dabei greifen die, entlang
zweier nicht dargestellter Achsen geführten, Drückwalzen 5, 6 örtlich am Umfang des
unbearbeiteten Trägerkörpers 3 ein. Dies offenbart die Fig. 3. Durch die unmittelbare
Druckeinwirkung der Drückwalzen 5, 6 wird der Werkstoff des Trägerkörpers 2 plastisch
verformt und zum Teil in Bohrrichtung entlang des Drückwalzdornes 3 verdrängt, so dass
der Trägerkörper 3 seine rohrförmige Form erhält. Die definierte Bewegung der Drückwalzen
5, 6 führt dazu, dass der den Trägerkörper 2 bildende Anteil des Rohlings auf die
geforderte Wandstärke reduziert und auf die gewünschte Länge gebracht wird.By means of a likewise not indicated counter-holding force is the insertion in
fixed in the axial direction and by a main drive of the flow-forming device in rotary motion
added. Corresponding symbols that indicate a rotational movement are the
Fig. 3 removable. Two pressure rollers 5, 6 of the flow-forming device have a
Drilling direction tapered outer contour. During the flow-forming process, a
Displacement of the rotating pressure rollers 5, 6 in the drilling direction. They grab the, along
guided two unillustrated axes, pressure rollers 5, 6 locally on the circumference of the
unprocessed carrier body 3 a. This is revealed in Fig. 3. By the immediate
Pressure action of the pressure rollers 5, 6, the material of the support body 2 is plastic
deformed and partially displaced in the drilling direction along the spinning
Während der Versetzung der Drückwalzen 5, 6 in Bohrrichtung, erfolgt eine Verschiebung
des Drückwalzdornes 3 in einer von der Bohrrichtung abgewandten Richtung. Dabei wird
ein Teil des Werkstoffes, aus dem der rohrförmige Trägerkörper 2 gebildet ist, seitlich verdrängt
und ein Boden 4 gebildet, dessen Wandstärke grösser ist als die Wandstärke des
rohrförmig ausgebildeten Abschnittes des Trägerkörpers 2. Die Wandstärke dieses im
Drückwalzverfahren hergestellten, rohrförmigen Abschnittes kann 0,7 mm bis 2, 5 mm,
insbesondere 1,7 mm betragen. Der rohrförmige Abschnitt weist eine Rundlaufabweichung
von höchstens 1,1 mm auf. Die Wandstärke des Bodens 4 beträgt 10 mm.
Mit Hilfe des Drückwalzverfahrens lassen sich rohrförmige Trägerkörper 2 mit einer Länge
von 20 mm bis 500 mm herstellen.During the displacement of the spinning rollers 5, 6 in the drilling direction, there is a shift
of the pressure-rolling
Die Wandstärke des Trägerkörpers 2 nimmt zum bohrrichtungsseitigen freien Ende des Trägerkörpers 2 hin zu, damit wenigstens ein nicht dargestelltes Diamanschneidelement gut an dem Trägerkörper 2 festgelegt werden kann. Die Erweiterung 8 des Trägerkörpers 2 ergibt sich durch eine radiale Erweiterung der Aussenkontur des Trägerkörpers 2 und erstreckt sich über eine parallel zur Bohrrichtung gemessene Länge, die der 0,04- bis 0,14-fachen Gesamtlänge des Trägerkörpers 2 entspricht. Die Wandstärke des Trägerkörpers 2 an dem bohrrichtungsseitigen freien Ende beträgt 1,5 mm bis 3,5 mm. Der Boden des Trägerkörpers 2 kann glockenförmig ausgebildet sein.The wall thickness of the carrier body 2 increases to the drilling direction-side free end of the Carrier body 2 towards, so that at least one not shown diamane cutting element can be set well on the carrier body 2. The extension 8 of the carrier body 2 results from a radial extension of the outer contour of the support body 2 and extends over a length measured parallel to the drilling direction, that of the 0.04- to 0.14 times the total length of the support body 2 corresponds. The wall thickness of the carrier body 2 at the drilling direction-side free end is 1.5 mm to 3.5 mm. Of the Bottom of the carrier body 2 may be bell-shaped.
Das Einsteckende 1, eine Längsnut 7 am Einsteckende 1 und das bohrrichtungsseitige
freie Ende des Trägerkörpers 2 werden, wir die Fig. 4 zeigt, mit Hilfe von
spanabhebenden Werkzeugen 9, 10 nachbearbeitet.The
Fig. 5 zeigt einen Grundkörper mit einem rohrförmigen Trägerkörper 12, der einstückig mit
einem Einsteckende 11 verbunden ist. Das Einsteckende 11 weist eine geschlossene
Längsnut 17 auf. Die Aussenseite und die Innenseite sind mit einer beispielsweise
trapezgewindeförmigen Profilierung versehen.Fig. 5 shows a base body with a
Claims (7)
- Body base for a diamond drill bit with a carrier (2, 12) in the shape of a pipe with a base (4) and a shaft (1, 11) extending from the base (4), characterised by the fact that the carrier (2, 12) and base (4) are produced in the pressure roller process.
- Body base according to claim 1, characterised by the fact that the carrier (2, 12) has a wall thickness, which corresponds to 0.008 to 0.016 times the external diameter of the carrier (2, 12).
- Body base according to claim 1 or 2, characterised by the fact that the carrier (2, 12) has a radial runout of less than 1.3 mm.
- Body base according to claims 1 to 3, characterised by the fact that the carrier (12) has profiling (13, 14) on the outside and/or inside.
- Body base according to claim 4, characterised by the fact that the profiling (13, 14) is in the shape of a spiral.
- Body base according to one of claims 1 to 5, characterised by the fact that the wall thickness of the carrier (2, 12) is extended on the free end of the carrier (2, 12) on the side in the direction of the drill.
- Body base according to claim 6, characterised by the fact that the extension of the wall thickness extends over a length, which corresponds to 0.04 to 0.14 times the total length of the carrier (2, 12).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10041911A DE10041911B4 (en) | 2000-08-25 | 2000-08-25 | diamond drill |
| DE10041911 | 2000-08-25 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1182324A2 EP1182324A2 (en) | 2002-02-27 |
| EP1182324A3 EP1182324A3 (en) | 2002-04-03 |
| EP1182324B1 true EP1182324B1 (en) | 2005-05-11 |
Family
ID=7653838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01810780A Expired - Lifetime EP1182324B1 (en) | 2000-08-25 | 2001-08-13 | Diamond drill bit |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6572447B2 (en) |
| EP (1) | EP1182324B1 (en) |
| JP (1) | JP5107491B2 (en) |
| AT (1) | ATE295469T1 (en) |
| DE (2) | DE10041911B4 (en) |
| DK (1) | DK1182324T3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675330A (en) * | 2013-11-27 | 2015-06-03 | 中国石油化工股份有限公司 | Dry method coring bit |
| US10662716B2 (en) * | 2017-10-06 | 2020-05-26 | Kennametal Inc. | Thin-walled earth boring tools and methods of making the same |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3692127A (en) * | 1971-05-10 | 1972-09-19 | Walter R Hampe | Rotary diamond core bit |
| JPS537145B2 (en) * | 1974-01-18 | 1978-03-15 | ||
| DE2807198A1 (en) * | 1978-02-20 | 1979-08-30 | Heller Verwaltungsges | Cup-shaped boring tool mfr. - in which cutters are welded onto rim of cup and end of central drill |
| US4328647A (en) * | 1980-04-09 | 1982-05-11 | Brammall, Inc. | Inside, outside honing tool |
| DE3603499A1 (en) * | 1985-05-07 | 1986-11-13 | Geißler & Kuper GmbH Diamantwerkzeug - Wiederaufbereitung, 3100 Celle | Diamond bit with shank tube and threaded tube connection |
| DE3744095A1 (en) * | 1987-12-24 | 1989-07-13 | Josef Dipl In Ehrenschwendtner | Methods for the manufacture of cylinder liners |
| JPH0746496Y2 (en) * | 1988-03-03 | 1995-10-25 | 有限会社吉野精機 | Rotary drill for small hole drilling |
| DE8805449U1 (en) * | 1988-04-25 | 1988-06-09 | Maier, Wolfgang, 5630 Remscheid, De | |
| JP2515111Y2 (en) * | 1990-09-01 | 1996-10-30 | ノリタケダイヤ株式会社 | Diamond drill |
| KR100277320B1 (en) * | 1992-06-03 | 2001-01-15 | 가나이 쓰도무 | Rolling mill and rolling method with on-line roll grinding device and grinding wheel |
| US5910041A (en) * | 1997-03-06 | 1999-06-08 | Keltech Engineering | Lapping apparatus and process with raised edge on platen |
| US6108856A (en) * | 1997-10-09 | 2000-08-29 | The Malish Corporation | Molded pad driver |
| JPH11169985A (en) * | 1997-12-04 | 1999-06-29 | Mazda Motor Corp | Formation of cylindrical parts with tooth |
-
2000
- 2000-08-25 DE DE10041911A patent/DE10041911B4/en not_active Expired - Lifetime
-
2001
- 2001-08-13 AT AT01810780T patent/ATE295469T1/en active
- 2001-08-13 DE DE50106178T patent/DE50106178D1/en not_active Expired - Fee Related
- 2001-08-13 EP EP01810780A patent/EP1182324B1/en not_active Expired - Lifetime
- 2001-08-13 DK DK01810780T patent/DK1182324T3/en active
- 2001-08-21 US US09/933,969 patent/US6572447B2/en not_active Expired - Lifetime
- 2001-08-22 JP JP2001251002A patent/JP5107491B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE10041911B4 (en) | 2009-02-05 |
| EP1182324A2 (en) | 2002-02-27 |
| DK1182324T3 (en) | 2005-09-12 |
| DE50106178D1 (en) | 2005-06-16 |
| JP2002096133A (en) | 2002-04-02 |
| DE10041911A1 (en) | 2002-03-07 |
| US6572447B2 (en) | 2003-06-03 |
| EP1182324A3 (en) | 2002-04-03 |
| JP5107491B2 (en) | 2012-12-26 |
| ATE295469T1 (en) | 2005-05-15 |
| US20020023635A1 (en) | 2002-02-28 |
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