EP0707129B1 - Drilling tool with tool body and cutting inserts - Google Patents
Drilling tool with tool body and cutting inserts Download PDFInfo
- Publication number
- EP0707129B1 EP0707129B1 EP95810469A EP95810469A EP0707129B1 EP 0707129 B1 EP0707129 B1 EP 0707129B1 EP 95810469 A EP95810469 A EP 95810469A EP 95810469 A EP95810469 A EP 95810469A EP 0707129 B1 EP0707129 B1 EP 0707129B1
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- drilling
- cutting
- measured
- width
- carrier body
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- 238000005553 drilling Methods 0.000 title claims description 60
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000004323 axial length Effects 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Classifications
-
- 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
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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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type
Definitions
- the invention relates to a drilling tool with a carrier body and one or more Cutting bodies, their width measured in the radial direction against the drilling direction subsequent to a continuous decrease in one step and the The cutting body protrudes radially and axially beyond the circumferential contour of the carrier body.
- Drilling tools of the type shown here are used to mine rock. Concrete, Masonry and the like materials.
- the structure of the carrier body can they are designed differently. What the drilling tools have in common, however, that they have one or more cutting bodies in the end region on the drilling direction, these cutting bodies made of wear-resistant material such as hard metal. Hard material or the like exist.
- the carrier body for example, there is the possibility. this in shape of a shaft. which carries a helix on the circumference, which is integrally formed or can be connected to it.
- the carrier body becomes radial and radial towered over by cutting bodies, it being, for example, in the case of smaller diameters to be a single and, in the case of larger diameters, a plurality of cutting bodies can.
- Such a drilling tool in particular for larger diameters, is for example known from DE-PS 25 43 578.
- a generic drilling tool for in particular small diameters is for example from DE-C-834 829 known.
- This drilling tool has a carrier body and an in Drilling direction adjoining, releasably attached cutting body.
- the one in radial The width of the cutting body measured in the direction decreases in the opposite direction to the drilling direction following a continuous decrease in one stage.
- the cutting body protrudes the circumferential contour of the carrier body radially and axially.
- the carrier body as a hollow drill bit.
- the region of the support body on the drilling direction becomes both axial and protrudes radially from the cutting body, which is distributed over the circumference as a hollow drill bit trained carrier body are arranged.
- the length of the cutting body is allowed Do not fall below a minimum dimension in the drilling direction, so that between the cutting body and the carrier body has a sufficiently large contact area, which is able to transmit the forces occurring.
- a hollow core bit is known for example from DE-PS 24 19 548.
- the cutting bodies have in common that their width measured in the radial direction is opposite to the drilling direction decreases continuously.
- the invention has for its object to provide a drilling tool in which even with prolonged use, the friction of the cutting body on the wall of the to be manufactured Drilling is not increased in an efficiency reducing manner.
- the object is achieved in that the step of reducing in a plane formed by the end of the carrier body on the drilling direction side.
- the decrease according to the invention of the width of the measured in the radial direction Cutting body in the form of a step leads to a kind of waist of the cutting body in its radially measured width.
- the level of Reduction coincides with the drilling direction end of the support body.
- the area projecting in the axial direction for forming the length responsible for the friction contributes.
- the area of the involvement the cutting body is used in the carrier body can not lead to an unacceptable increase the friction of the drilling tool on the wall of the hole to be made.
- the friction increases with the duration Use to a certain extent.
- the maximum amount of friction can be determined by the However, the step according to the invention can be limited in such a way that the friction does not yet occur has an impact on efficiency. This maximum amount depends on the choice the arrangement of the stage, where it has been shown that preferred values then arise when the measured in the axial direction from the free end of the Cutting body to the level of reduction about 0.3 to 0.5 times that corresponds to the total length of the cutting body measured in the axial direction.
- the cutting body 2 is embedded in the carrier body 1.
- FIG. 1 also shows, the width R des measured in the radial direction increases Cutting body 2 in the area K continuously down to a step S.
- the step S there is a further decrease in the width R measured in the radial direction
- the step S essentially falls with the direction of the drilling direction End E of the carrier body 1 together.
- the dimension B towers above Cutting body 2, the drilling direction end E of the support body 1, the entire Length of the cutting body 2 corresponds to dimension A.
- the 2 has a carrier body designed as a hollow drill bit 3, in which cutting bodies 4 are embedded.
- the cutting body 4 protrude the wall thickness of the carrier body 3 in the radial direction and exceed the drilling direction side End E of the carrier body 3.
- the width R measured in the radial direction decreases the cutting body 4 against the drilling direction continuously in the area K up to the step S.
- the width R measured in the radial direction Width R decreases the cutting body 4 against the drilling direction continuously in the area K up to the step S.
- Level S falls - like that in 2 shows the example shown - with the drilling direction end E of the carrier body 3 together.
- the length B exceeds the cutting body 4 on the drilling direction side End E of the support body 3 in the drilling direction, during the entire length of the Cutting body 4 corresponds to dimension A.
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drilling Tools (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
Die Erfindung betrifft ein Bohrwerkzeug mit Trägerkörper und einem oder mehreren Schneidkörpern, deren in radialer Richtung gemessene Breite entgegen der Bohrrichtung anschliessend an eine kontinuierliche Abnahme sich in einer Stufe verringert und die Schneidkörper die Umfangskontur des Trägerkörpers radial sowie axial überragen.The invention relates to a drilling tool with a carrier body and one or more Cutting bodies, their width measured in the radial direction against the drilling direction subsequent to a continuous decrease in one step and the The cutting body protrudes radially and axially beyond the circumferential contour of the carrier body.
Bohrwerkzeuge der hier in ede stehenden Art dienen dem Abbau von Gestein. Beton, Mauerwerk und dergleichen Materialien. Insbesondere im Aufbau der Trägerkörper können sie unterschiedlich ausgebildet sein. Gemeinsam ist den Bohrwerkzeugen jedoch, dass sie im bohrrichtungsseitigen Endbereich einen oder mehrere Schneidkörper aufweisen, wobei diese Schneidkörper aus verschleissfestem Werkstoff wie Hartmetall. Hartstoff oder dergleichen bestehen.Drilling tools of the type shown here are used to mine rock. Concrete, Masonry and the like materials. In particular, the structure of the carrier body can they are designed differently. What the drilling tools have in common, however, that they have one or more cutting bodies in the end region on the drilling direction, these cutting bodies made of wear-resistant material such as hard metal. Hard material or the like exist.
Aus der Sicht des Trägerkörpers besteht beispielsweise die Möglichkeit. diesen in Form eines Schaftes auszubilden. der am Umfang eine Wendel trägt, die einstückig angeformt oder damit verbunden sein kann. Bohrrichtungsseitig sowie radial wird der Trägerkörper von Schneidkörpem überragt, wobei es sich beispielsweise bei kleineren Durchmessem um einen einzigen und bei grösseren Durchmessem um mehrere Schneidkörper handeln kann. Ein derartiges Bohrwerkzeug, insbesondere für grössere Durchmesser, ist beispielsweise aus der DE-PS 25 43 578 bekannt.From the point of view of the carrier body, for example, there is the possibility. this in shape of a shaft. which carries a helix on the circumference, which is integrally formed or can be connected to it. The carrier body becomes radial and radial towered over by cutting bodies, it being, for example, in the case of smaller diameters to be a single and, in the case of larger diameters, a plurality of cutting bodies can. Such a drilling tool, in particular for larger diameters, is for example known from DE-PS 25 43 578.
Ein gattungsgemaßes Bohrwerkzeug für insbesondere kleine Durchmesser ist beispielsweise aus der DE-C-834 829 bekannt. Dieses Bohrwerkzeug weist einen Trägerkörper und einen sich in Bohrrichtung daran anschliessenden, lösbar aufgesetzten Schneidkörper auf. Die in radialer Richtung gemessene Breite des Schneidkörpers verringert sich entgegen der Bohrrichtung anschliessend an eine kontinuierliche Abnahme in einer Stufe. Der Schneidkörper überragt die Umfangskontur des Trägerkörpers radial sowie axial.A generic drilling tool for in particular small diameters is for example from DE-C-834 829 known. This drilling tool has a carrier body and an in Drilling direction adjoining, releasably attached cutting body. The one in radial The width of the cutting body measured in the direction decreases in the opposite direction to the drilling direction following a continuous decrease in one stage. The cutting body protrudes the circumferential contour of the carrier body radially and axially.
Darüber hinaus besteht - insbesondere für die Herstellung von Bohrungen grösserer Durchmesser - die Möglichkeit. den Trägerkörper als Hohlbohrkrone auszubilden. In diesem Falle wird der bohrrichtungsseitige Bereich des Trägerkörpers sowohl axial als auch radial von Schneidkörpem überragt, die über den Umfang verteilt an dem als Hohlbohrkrone ausgebildeten Trägerkörper angeordnet sind. Dabei darf die Länge der Schneidkörper in Bohrrichtung ein Mindestmass nicht unterschreiten, damit zwischen Schneidkörper und Trägerkörper eine ausreichend grosse Kontaktfläche vorhanden ist, welche zur Uebertragung der auftretenden Kräfte in der Lage ist. Eine solche Hohlbohrkrone ist beispielsweise aus der DE-PS 24 19 548 bekannt. There is also - especially for the production of larger holes Diameter - the possibility. form the carrier body as a hollow drill bit. In this Trap the region of the support body on the drilling direction becomes both axial and protrudes radially from the cutting body, which is distributed over the circumference as a hollow drill bit trained carrier body are arranged. The length of the cutting body is allowed Do not fall below a minimum dimension in the drilling direction, so that between the cutting body and the carrier body has a sufficiently large contact area, which is able to transmit the forces occurring. Such a hollow core bit is known for example from DE-PS 24 19 548.
Wie die vorgenannten bekannten Bohrwerkzeuge zeigen, ist den Schneidkörpem gemeinsam, dass deren in radialer Richtung gemessene Breite entgegen der Bohrrichtung kontinuierlich abnimmt. Im Falle der Hohlbohrkrone als Trägerkörper bedeutet dies, dass die in radialer Richtung gemessene Breite der Schneidkörper entgegen der Bohrrichtung kontinuierlich sowohl zur Innen- als auch zur Aussenkontur des Trägerkörpers hin abnimmt. Mit dieser Abnahme der Breite der Schneidkörper soll erreicht werden, dass die Reibung der Schneidkörper an der Wandung der herzustellenden Bohrung verringert wird.As the known drilling tools mentioned above, the cutting bodies have in common that their width measured in the radial direction is opposite to the drilling direction decreases continuously. In the case of the hollow core bit as the carrier body, this means that the width of the cutting body measured in the radial direction against the drilling direction continuously decreases towards both the inner and outer contours of the carrier body. This decrease in the width of the cutting body is intended to achieve that Friction of the cutting bodies on the wall of the bore to be produced is reduced becomes.
Solange die Bohrwerkzeuge neu sind, wird die Zielsetzung einer Verringerung der Reibung weitgehend erreicht. Je länger der Einsatz der Bohrwerkzeuge aber dauert, desto stärker nähert sich die radial gemessene Breite der Schneidkörper aufgrund des Verschleisses in radialer Richtung einem konstanten Mass. Dies führt dazu, dass die an der Wandung der herzustellenden Bohrung reibende Fläche der Schneidkörper entgegen der Bohrrichtung immer länger wird, was dazu führt, dass durch laufende Erhöhung der Reibung der Wirkungsgrad der Bohrwerkzeuge erheblich abnimmt. Im Extremfalle erstreckt sich die an der Wandung der herzustellenden Bohrung reibende Fläche der Schneidkörper über deren gesamte axiale Länge, dh auch über die Länge, um die die Schneidkörper im Trägerkörper eingebettet sind. Dies führt schliesslich zu einer Ueberlastung der Antriebsgeräte und zum Festklemmen der Bohrwerkzeuge in der herzustellenden Bohrung.As long as the drilling tools are new, the goal is to reduce friction largely achieved. However, the longer the drilling tools are used, the more The radially measured width of the cutting bodies is closer due to the wear a constant dimension in the radial direction. This leads to the fact that at the Wall of the bore to be produced rubbing surface of the cutting body the direction of drilling is getting longer, which means that by continuously increasing the Friction the efficiency of the drilling tools decreases significantly. In extreme cases extends the surface of the bore to be rubbed against the wall of the bore Cutting body over their entire axial length, ie also over the length by which Cutting bodies are embedded in the carrier body. This ultimately leads to one Overloading the drive units and for clamping the drilling tools in the hole to be produced.
Die geschilderte Problematik wird bei den in den letzten Jahren vermehrt Verwendung findenden Vollbohrem mit mehr als einem Schneidkörper noch verstärkt. Diese Bohrwerkzeuge erzeugen kreisrunde Löcher mit engeren Toleranzen als die bisher üblichen, mit einem Schneidkörper versehenen Bohrwerkzeuge. Der Klemmeffekt durch den vorstehend genannten Veschleiss fällt dadurch besonders ins Gewicht, so dass die diesbezügliche Problematik wesentlich verschärft wird. In gleich verschärfter Weise tritt diese Problematik auch bei Bohrwerkzeugen auf, deren Trägerkörper als Hohlbohrkrone mit mehreren Schneidkörpem ausgebildet ist, da auch solche Bohrwerkzeuge zu Bohrungen mit engen Toleranzen führen.The problems described have been increasingly used in recent years finding full drill with more than one cutting body reinforced. These drilling tools create circular holes with tighter tolerances than the usual ones drilling tools provided with a cutting body. The clamping effect by the above Veschleiss mentioned is particularly important, so that the relevant Problem is significantly exacerbated. This occurs in the same way Problem also with drilling tools, the carrier body with a hollow drill bit with several cutting bodies is formed, since such drilling tools for drilling lead with tight tolerances.
Der Erfindung liegt die Aufgabe zugrunde, ein Bohrwerkzeug zu schaffen, bei welchem selbst bei längerem Einsatz die Reibung der Schneidkörper an der Wandung der herzustellenden Bohrung nicht in einer den Wirkungsgrad herabsetzenden Weise erhöht wird. The invention has for its object to provide a drilling tool in which even with prolonged use, the friction of the cutting body on the wall of the to be manufactured Drilling is not increased in an efficiency reducing manner.
Erfindungsgemäss wird die Aufgabe dadurch gelöst, dass die Stufe der Verringerung in einer von dem bohrrichtungsseitigen Ende des Trägerkörpers gebildeten Ebene liegt.According to the invention the object is achieved in that the step of reducing in a plane formed by the end of the carrier body on the drilling direction side.
Die erfindungsgemässe Abnahme der in radialer Richtung gemessenen Breite der Schneidkörper in Form einer Stufe führt zu einer Art Taillierung der Schneidkörper in ihrer radial gemessenen Breite. Dies hat zur Folge, dass selbst nach längerem Einsatz der Bohrwerkzeuge die zur Reibung an der Wandung der herzustellenden Bohrung führende Länge der Schneidkörper entgegen der Bohrrichtung bis höchstens zur Stufe reicht. Es wird somit ein noch zulässiger Maximalbetrag an Reibung nicht überschritten, unabhängig von der Länge des Einsatzes der Bohrwerkzeuge.The decrease according to the invention of the width of the measured in the radial direction Cutting body in the form of a step leads to a kind of waist of the cutting body in its radially measured width. As a result, even after a long period of use Drilling tools that lead to friction on the wall of the bore to be produced Length of the cutting body against the drilling direction extends up to the step. It a maximum allowable amount of friction is not exceeded, regardless on the length of the use of the drilling tools.
Unabhängig von der Ausbildung des Trägerkörpers ist es von Vorteil, wenn die Stufe der Verringerung mit dem bohrrichtungsseitigen Ende des Trägerkorperszusammenfällt. Damit wird erreicht, dass maximal der in axialer Richtung überstehende Bereich zur Bildung der für die Reibung verantwortlichen Länge beiträgt. Der Bereich, welcher der Einbindung der Schneidkörper im Trägerkörper dient, kann damit zu keiner unzulässigen Erhöhung der Reibung des Bohrwerkzeuges an der Wandung der herzustellenden Bohrung führen.Regardless of the design of the support body, it is advantageous if the level of Reduction coincides with the drilling direction end of the support body. In order to is achieved that at most the area projecting in the axial direction for forming the length responsible for the friction contributes. The area of the involvement the cutting body is used in the carrier body, can not lead to an unacceptable increase the friction of the drilling tool on the wall of the hole to be made.
Selbst bei den erfindungsgemässen Bohrwerkzeugen nimmt die Reibung mit fortdauerndem Einsatz um ein gewisses Mass zu. Der Maximalbetrag der Reibung kann durch die erfindungsgemässe Stufe jedoch derart begrenzt werden, dass die Reibung noch keinen wirkungsgradmindemden Einfluss hat. Abhängig ist dieser Maximalbetrag von der Wahl der Anordnung der Stufe, wobei sich diesbezüglich gezeigt hat, dass bevorzugte Werte dann entstehen, wenn das in axialer Richtung gemessene Mass vom freien Ende der Schneidkörper bis zur Stufe der Verringerung etwa dem 0,3- bis 0,5-fachen der gesamten in axialer Richtung gemessenen Länge der Schneidkörper entspricht.Even with the drilling tools according to the invention, the friction increases with the duration Use to a certain extent. The maximum amount of friction can be determined by the However, the step according to the invention can be limited in such a way that the friction does not yet occur has an impact on efficiency. This maximum amount depends on the choice the arrangement of the stage, where it has been shown that preferred values then arise when the measured in the axial direction from the free end of the Cutting body to the level of reduction about 0.3 to 0.5 times that corresponds to the total length of the cutting body measured in the axial direction.
Um sicherzustellen, dass der entgegen der Bohrrichtung an die Stufe anschliessende Bereich der Schneidkörper nicht an der Reibung teilnimmt, ist eine ausreichende Reduzierung der in radialer Richtung gemessenen Breite der Schneidkörper im Anschluss an die Stufe sicherzustellen. Dies wird dann erreicht, wenn in bevorzugter Weise sich die in radialer Richtung gemessene Breite der Schneidkörper an der Stufe um mindestens 30 % des Masses reduziert, um welches die Schneidkörper den Trägerkörper entgegen der Bohrrichtung im Anschluss an die Stufe radial überragen. Dies bedeutet, dass sich die in radialer Richtung gemessene Breite der Schneidkörper im Anschluss an die Stufe bis maximal zur Aussenkontur des Trägerkörpers reduzieren kann. To make sure that the one that is opposite to the drilling direction adjoins the step Area of the cutting body does not participate in the friction is a sufficient reduction the width of the cutting body measured in the radial direction to ensure the level. This is achieved when the in radial direction measured width of the cutting body on the step by at least 30% of the amount reduced by which the cutting body counteracts the carrier body project radially beyond the drilling direction after the step. This means that yourself the width of the cutting element measured in the radial direction after the step can reduce to a maximum of the outer contour of the carrier body.
Im Sinne eines symmetrischen Aufbaus der Schneidkörper ist zweckmässigerweise vorgesehen, dass sich die in radialer Richtung gemessene Breite an beiden Breitseiten der Schneidkörper in einer Stufe verringert.In the sense of a symmetrical structure of the cutting body, it is expedient to provide that the width measured in the radial direction on both broad sides of the Cutting body reduced in one step.
Wie bereits darauf hingewiesen, werden für Bohrungen grösserer Durchmesser bevorzugt Trägerkörper in Form einer Hohlbohrkrone verwendet. Auch bei solchen Trägerkörpern, wo die Schneidkörper über den stirnseitigen Umfang verteilt sind, führt die erfindungsgemässe Taillierung zu den genannten Vorteilen. Demnach ist gemäss einer weiteren Ausführungsform der Erfindung der Trägerkörper eine Hohlbohrkrone, wobei die in radialer Richtung gemessene Breite der Schneidkörper entgegen der Bohrrichtung anschliessend an die kontinuierliche Abnahme sich in einer Stufe zur Innen- und Aussenkontur des Trägerkörpers hin verringert. Auch hier sind die Schneidkörper zweckmässigerweise symmetrisch aufgebaut, dh die in radialer Richtung gemessene Breite der Schneidkörper verringert sich an beiden Breitseiten in einer Stufe. Ebenso fällt in bevorzugter Weise die Stufe im wesentlichen mit dem bohrrichtungsseitigen Ende des Trägerkörpers zusammen. Hinausgehend über die genannten Vorteile wird mit der erfindungsgemässen Ausbildung die Entnahme der Bohrkeme wesentlich verbessert.As already indicated, larger diameter bores are preferred Carrier body used in the form of a hollow core bit. Even with such support bodies, Where the cutting bodies are distributed over the end circumference, the inventive leads Fitting to the advantages mentioned. Accordingly, according to another Embodiment of the invention of the carrier body a hollow core bit, the in then, in the radial direction, the width of the cutting bodies opposite to the drilling direction the continuous decrease in one step to the inner and outer contour of the carrier body reduced. The cutting bodies are also expedient here constructed symmetrically, ie the width of the measured in the radial direction Cutting body is reduced in one step on both broad sides. Likewise, falls in preferred The step essentially with the drilling direction end of the support body together. Going beyond the advantages mentioned with the Training according to the invention significantly improves the removal of the drilling core.
Die Erfindung wird nachstehend anhand von Zeichnungen, welche Ausführungsbeispiele wiedergeben, näher erläutert. Es zeigen:
- Fig. 1
- eine Ansicht des bohrrichtungsseitigen Bereiches eines Bohrwerkzeuges gemäss Erfindung;
- Fig. 2
- einen Schnitt durch den bohrrichtungsseitigen Bereich eines Bohrwerkzeuges gemäss Erfindung, mit einem als Hohlbohrkrone ausgebildeten Trägerkörper.
- Fig. 1
- a view of the drilling direction area of a drilling tool according to the invention;
- Fig. 2
- a section through the drilling direction area of a drilling tool according to the invention, with a support body designed as a hollow drill bit.
Das Bohrwerkzeug gemäss Fig. 1 besteht aus einem Trägerkörper 1 und einem Schneidkörper 2. Der Schneidkörper 2 ist im Trägerkörper 1 eingebettet.1 consists of a carrier body 1 and a Cutting body 2. The cutting body 2 is embedded in the carrier body 1.
Wie die Fig. 1 femer zeigt, nimmt die in radialer Richtung gemessene Breite R des Schneidkörpers 2 im Bereich K kontinuierlich ab, bis zu einer Stufe S. An der Stufe S erfolgt eine weitere Abnahme der in radialer Richtung gemessenen Breite R. Gemäss dem in der Fig. 1 dargestellten Beispiel fällt die Stufe S im wesentlichen mit dem bohrrichtungsseitigen Ende E des Trägerkörpers 1 zusammen. Um das Mass B überragt der Schneidkörper 2 das bohrrichtungsseitige Ende E des Trägerkörpers 1, wobei die gesamte Länge des Schneidkörpers 2 dem Mass A entspricht. As FIG. 1 also shows, the width R des measured in the radial direction increases Cutting body 2 in the area K continuously down to a step S. At the step S there is a further decrease in the width R measured in the radial direction In the example shown in FIG. 1, the step S essentially falls with the direction of the drilling direction End E of the carrier body 1 together. The dimension B towers above Cutting body 2, the drilling direction end E of the support body 1, the entire Length of the cutting body 2 corresponds to dimension A.
Das Bohrwerkzeug gemäss Fig. 2 weist einen als Hohlbohrkrone ausgebildeten Trägerkörper
3 auf, in welchen Schneidkörper 4 eingebettet sind. Die Schneidkörper 4 überragen
die Wandstärke des Trägerkörpers 3 in radialer Richtung und übersteigen das bohrrichtungsseitige
Ende E des Trägerkörpers 3.2 has a carrier body designed as a
Wie die Fig. 2 femer zeigt, verringert sich die in radialer Richtung gemessene Breite R
der Schneidkörper 4 entgegen der Bohrrichtung kontinuierlich im Bereich K bis zur Stufe
S. An der Stufe S erfolgt eine weitere Verringerung der in radialer Richtung gemessenen
Breite R in der Weise, dass die Wandstärke des Trägerkörpers 3 in radialer Richtung nur
noch geringfügig von den Schneidkörpem 4 überragt wird. Die Stufe S fällt - wie das in
der Fig. 2 gezeigte Beispiel zeigt - mit dem bohrrichtungsseitigen Ende E des Trägerkörpers
3 zusammen. Um die Länge B übersteigen die Schneidkörper 4 das bohrrichtungsseitige
Ende E des Trägerkörpers 3 in Bohrrichtung, während die gesamte Länge der
Schneidkörper 4 dem Mass A entspricht.As FIG. 2 also shows, the width R measured in the radial direction decreases
the cutting
In den Beispielen sowohl gemäss Fig. 1 als auch gemäss Fig. 2 überragt die in radialer
Richtung gemessene Breite R der Schneidkörper 2, 4 entgegen der Bohrrichtung anschliessend
an die Stufe S den Trägerkörper 1, 3 noch geringfügig. Dieses Ueberragen
kann sich im Extremfalle vollständig reduzieren, so dass die in diesem Bereich gemessene
radiale Breite der Schneidkörper 2, 4 der in radialer Richtung gemessenen Erstreckung
des Trägerkörpers 1, 3 - im Falle einer Hohlbohrkrone deren Wandstärke-entspricht.In the examples both in accordance with FIG. 1 and in accordance with FIG. 2, that projects in the radial direction
Direction measured width R of the cutting
Claims (5)
- Drilling apparatus with carrier body (1, 3) and one or more cutting elements (2, 4), the width (R) of which, as measured in the radial direction, against the drilling direction adjacent a continuous pickup (K) reduces in one step (S), and the cutting elements (2, 4) both radially and axially project over the peripheral contour of the carrier body (1, 3), characterised in that the step (S) of the reduction lies in a plane established by the drilling end (E) of the carrier body (1, 3).
- Cutting element according to Claim 1, characterised in that the dimension (B) measured in the axial direction from the free end of the cutting elements (2, 4) to the step (S) corresponds approximately with between 0.3 and 0.5 times the total length (A), as measured in the axial direction, of the cutting elements (2, 4).
- Drilling apparatus according to one of Claims 1 to 2, characterised in that the width (R) of the cutting elements (2, 4), as measured in radial direction, reduces at the step (S) by at least 30% of the dimension by which the cutting elements (2, 4) radially protrude the carrier body (1, 3) against the drilling direction and adjacent to step (S).
- Drilling apparatus according to one of Claims 1 to 3, characterised in that the width (R) as measured in the radial direction reduces on both broad sides of the cutting elements (2, 4) in one step (S).
- Drilling apparatus according to one of Claims 1 to 4, characterised in that the carrier body (3) is a hollow drill tip, and the width (R), as measured in the radial direction, of the cutting elements (4) reduces against the drilling direction adjacent the continuous pickup (K) in one step (S) towards the inside and outside contour of the carrier body (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4436916A DE4436916A1 (en) | 1994-10-15 | 1994-10-15 | Drilling tool with carrier body and cutting bodies |
| DE4436916 | 1994-10-15 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0707129A2 EP0707129A2 (en) | 1996-04-17 |
| EP0707129A3 EP0707129A3 (en) | 1997-08-06 |
| EP0707129B1 true EP0707129B1 (en) | 1999-06-16 |
Family
ID=6530875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95810469A Expired - Lifetime EP0707129B1 (en) | 1994-10-15 | 1995-07-17 | Drilling tool with tool body and cutting inserts |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US5628376A (en) |
| EP (1) | EP0707129B1 (en) |
| JP (1) | JP3706664B2 (en) |
| KR (1) | KR100318971B1 (en) |
| CN (1) | CN1081280C (en) |
| AT (1) | ATE181398T1 (en) |
| CA (1) | CA2160042C (en) |
| DE (2) | DE4436916A1 (en) |
| DK (1) | DK0707129T3 (en) |
| FI (1) | FI111980B (en) |
| HU (1) | HU216401B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970006498A (en) * | 1995-07-31 | 1997-02-21 | 유충식 | Purification Method of Active Phosphorus Growth Hormone |
| DE10054850B4 (en) * | 2000-11-04 | 2009-08-06 | Hilti Aktiengesellschaft | Drill bit for rock |
| US6599063B1 (en) * | 2002-08-31 | 2003-07-29 | Richard E. Capstran | Hole saw having efficient slug removal |
| US6817429B2 (en) | 2002-10-03 | 2004-11-16 | Jimmie Sollami | Roof bit carbide blade |
| US7363118B2 (en) * | 2004-08-02 | 2008-04-22 | Volvo Trucks North America, Inc. | Methods and apparatus for reducing vehicle tire wear |
| US9500036B2 (en) | 2006-12-14 | 2016-11-22 | Longyear Tm, Inc. | Single-waterway drill bits and systems for using same |
| US7628228B2 (en) * | 2006-12-14 | 2009-12-08 | Longyear Tm, Inc. | Core drill bit with extended crown height |
| US9506298B2 (en) | 2013-11-20 | 2016-11-29 | Longyear Tm, Inc. | Drill bits having blind-hole flushing and systems for using same |
| US8459381B2 (en) * | 2006-12-14 | 2013-06-11 | Longyear Tm, Inc. | Drill bits with axially-tapered waterways |
| US9279292B2 (en) | 2013-11-20 | 2016-03-08 | Longyear Tm, Inc. | Drill bits having flushing and systems for using same |
| US8590646B2 (en) * | 2009-09-22 | 2013-11-26 | Longyear Tm, Inc. | Impregnated cutting elements with large abrasive cutting media and methods of making and using the same |
| US8657894B2 (en) | 2011-04-15 | 2014-02-25 | Longyear Tm, Inc. | Use of resonant mixing to produce impregnated bits |
| DE102011081443A1 (en) * | 2011-08-23 | 2013-02-28 | Robert Bosch Gmbh | Drill bit, in particular reinforced concrete bit |
| CN103042606A (en) * | 2012-12-17 | 2013-04-17 | 天津市泽华工艺品有限公司 | Multi-stage step type stone processing drill drum |
| EP2745966A1 (en) * | 2012-12-21 | 2014-06-25 | HILTI Aktiengesellschaft | Annular drill bit with a replaceable cutting section |
| CN107208459B (en) | 2015-01-12 | 2020-09-29 | 长年Tm公司 | Drilling tool having a matrix of carbide-forming alloy and methods of making and using the same |
| EP4163037A1 (en) * | 2021-10-11 | 2023-04-12 | Hilti Aktiengesellschaft | Drill bit with improved drill core removal |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1204805A (en) * | 1912-09-11 | 1916-11-14 | Cathrine Macdonald | Drill. |
| US1112498A (en) * | 1913-05-01 | 1914-10-06 | Louis Jean Chretien Van Es | Drill. |
| DE384829C (en) * | 1921-07-15 | 1923-11-06 | Erich Horn | Stops for the loosened brake blocks, especially for motor vehicles |
| DE385938C (en) * | 1922-11-28 | 1923-12-14 | Albert Nuernberg | Rock drill |
| FR889080A (en) * | 1942-01-16 | 1943-12-30 | Flottmann Ag | Hard metal cutting edge drill bit attached |
| DE800853C (en) * | 1948-10-02 | 1950-12-11 | Adolf Meutsch | Point chisels for breakers |
| DE834829C (en) * | 1949-02-06 | 1952-03-24 | Herbert Jeschke Dr Ing | Rock percussion drill with detachable attached drill bit |
| US2998086A (en) * | 1954-09-27 | 1961-08-29 | Joseph Morris | Reciprocating core drill |
| DE2419548C2 (en) | 1974-04-23 | 1983-05-05 | Hawera Probst Gmbh + Co, 7980 Ravensburg | Drilling tool for rotary hammers |
| DE2543578C2 (en) | 1975-09-30 | 1986-03-06 | Friedrich Duss Maschinenfabrik GmbH & Co, 7265 Neubulach | Rock drill |
| DE3105268A1 (en) * | 1980-11-03 | 1982-06-09 | Robert Bosch Gmbh, 7000 Stuttgart | DRILL BIT |
| DE4003374C1 (en) * | 1990-02-05 | 1991-05-08 | Sfs Stadler Holding Ag, Heerbrugg, Ch | |
| DE9308443U1 (en) * | 1993-06-05 | 1993-08-19 | Bilfinger + Berger Bauaktiengesellschaft, 68165 Mannheim | Solid core bit for making cased earth bores |
-
1994
- 1994-10-15 DE DE4436916A patent/DE4436916A1/en not_active Withdrawn
-
1995
- 1995-07-17 AT AT95810469T patent/ATE181398T1/en active
- 1995-07-17 DE DE59506217T patent/DE59506217D1/en not_active Expired - Lifetime
- 1995-07-17 EP EP95810469A patent/EP0707129B1/en not_active Expired - Lifetime
- 1995-07-17 DK DK95810469T patent/DK0707129T3/en active
- 1995-09-26 KR KR1019950031828A patent/KR100318971B1/en not_active IP Right Cessation
- 1995-09-27 US US08/534,536 patent/US5628376A/en not_active Expired - Lifetime
- 1995-10-06 CA CA002160042A patent/CA2160042C/en not_active Expired - Fee Related
- 1995-10-12 FI FI954850A patent/FI111980B/en not_active IP Right Cessation
- 1995-10-13 HU HU9502975A patent/HU216401B/en not_active IP Right Cessation
- 1995-10-13 CN CN95118490A patent/CN1081280C/en not_active Expired - Fee Related
- 1995-10-16 JP JP26720495A patent/JP3706664B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| HU216401B (en) | 1999-06-28 |
| JP3706664B2 (en) | 2005-10-12 |
| DE4436916A1 (en) | 1996-04-18 |
| DE59506217D1 (en) | 1999-07-22 |
| KR100318971B1 (en) | 2002-04-22 |
| HUT72769A (en) | 1996-05-28 |
| EP0707129A3 (en) | 1997-08-06 |
| FI954850A (en) | 1996-04-16 |
| FI111980B (en) | 2003-10-15 |
| US5628376A (en) | 1997-05-13 |
| CA2160042C (en) | 1999-01-12 |
| KR960014591A (en) | 1996-05-22 |
| HU9502975D0 (en) | 1995-12-28 |
| CN1081280C (en) | 2002-03-20 |
| ATE181398T1 (en) | 1999-07-15 |
| CA2160042A1 (en) | 1996-04-16 |
| EP0707129A2 (en) | 1996-04-17 |
| FI954850A0 (en) | 1995-10-12 |
| JPH08199964A (en) | 1996-08-06 |
| CN1128321A (en) | 1996-08-07 |
| DK0707129T3 (en) | 1999-12-13 |
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