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EP0226537B1 - Rock drill bit - Google Patents

Rock drill bit Download PDF

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Publication number
EP0226537B1
EP0226537B1 EP86810551A EP86810551A EP0226537B1 EP 0226537 B1 EP0226537 B1 EP 0226537B1 EP 86810551 A EP86810551 A EP 86810551A EP 86810551 A EP86810551 A EP 86810551A EP 0226537 B1 EP0226537 B1 EP 0226537B1
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EP
European Patent Office
Prior art keywords
cutting
drill
pins
cutting pins
rock drill
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
Application number
EP86810551A
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German (de)
French (fr)
Other versions
EP0226537A2 (en
EP0226537A3 (en
Inventor
Dieter Scholz
Friedrich Flesch
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Hilti AG
Original Assignee
Hilti AG
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Publication date
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Application filed by Hilti AG filed Critical Hilti AG
Publication of EP0226537A2 publication Critical patent/EP0226537A2/en
Publication of EP0226537A3 publication Critical patent/EP0226537A3/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58—Chisel-type inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts

Definitions

  • the invention relates to a rock drill with a shaft and this radially projecting drill head, with an end face pointing in the feed direction.
  • Rock drills are used to drill holes in rock, concrete, masonry and the like, which are used to hold fasteners, pass through pipes and cables and to blow up. So far, two different types of rock drill bits with carbide inserts have mainly been known.
  • Rock drills known from EP-A-0 048 908, which have one or more cutting plates, are relatively simple to manufacture and are mainly used in small dimensions up to a diameter of approximately 35 mm.
  • these drills have the disadvantage that the cutting edges of the cutting plates, particularly in the outer area, wear out quickly and so that the drilling progress decreases quickly. Handling is also impaired by the corner wear.
  • the invention has for its object to provide an economically producible rock drill that allows good removal of the drill material and compliance with an accurate drill hole geometry with high mining performance.
  • the object is achieved in that the discharge grooves run in the longitudinal direction of the drill head and the end face of the drill head is provided with cutting pins made of hard metal, the free ends of the cutting pins lying in the rotational surface formed by the cutting edges of the cutting plate.
  • the cutting insert leads in particular to a good drilling behavior of the rock drill in connection with a subsequent good concentricity, which ensures that a precise drill hole geometry is maintained.
  • the additional arrangement of the cutting pins ensures that the cutting plate and cutting pins are supplied to the material to be machined at substantially the same time, and so the cutting edges of the cutting plate are less worn and the drilling progress also slows down.
  • the requirement that the free end faces of the cutting pins lie in the rotational surface formed by the cutting edges of the cutting plate serves for this purpose. This ensures that the insert and cutting pins attack the material to be machined at the same time. The wear of the insert and cutting pins is thus kept low, which has a positive effect on the drilling progress.
  • At least some of the cutting pins can be arranged parallel to the drill axis. Since the cutting pins are mainly stressed in the direction of the drill axis, such an arrangement of the cutting pins provides good support in the drill head. By arranging the cutting pins parallel to the drill axis, they can also be arranged relatively close to the cutting plate. From the point of view of comminution of the drill material, at least some of the cutting pins can be arranged inclined to the drill axis. For example, in the case of a conical end face of the drilling head, the cutting pins can be arranged approximately perpendicular to the surface of the drilling head, which enables the cutting pins to be embedded to a maximum.
  • At least some of the cutting pins are advantageously arranged on different radii.
  • a part of the cutting pins expediently projects beyond the circumferential contour of the drill head.
  • These cutting pins which protrude beyond the circumferential contour, prevent the drill material from being compressed and jammed between the drill head and the wall of the borehole.
  • these cutting pins promote the creation of a high-quality borehole wall and ensure compliance with the exact borehole geometry.
  • the free ends of the cutting pins advantageously lie in the rotational surface formed by the cutting edges of the cutting plate.
  • the rock drill thus attacks the material to be machined simultaneously by the cutting plate and the cutting pins.
  • the wear of the cutting plate and cutting pins is kept low and the drilling progress is only slowed down considerably.
  • the hardness of the cutting pins is advantageously matched to that of the cutting plate, so that the cutting plate and the cutting pins are worn approximately uniformly and the engagement conditions are thus maintained.
  • the rock drill shown in FIGS. 1 to 3 essentially consists of a shank 1 and an associated drill head, designated overall by 2.
  • the shaft 1 is provided with a conveying helix 3, which serves on the one hand to guide the drill in the borehole and on the other hand to remove the cuttings.
  • the drill head 2 is provided with discharge grooves 4 running in the longitudinal direction, which serve for the passage of the cuttings from the end face 2a of the drill head 2 pointing in the feed direction to the shank 1.
  • the drill head 2 is provided with a centrally arranged cutting plate 5.
  • the cutting plate 5 projects beyond the drilling head 2 both in the radial direction and in the feed direction.
  • the remaining end face 2a of the drill head 2 is provided with cutting pins 6, 7.
  • the cutting pin 6 is arranged such that it runs parallel to the drill axis, while the cutting pin 7 is arranged inclined to the drill axis.
  • the cutting pins 6, 7 are inserted so deeply into the drilling head 2 that the free ends of the cutting pins 6, 7 lie in the rotational surface formed by the cutting edges 5a, 5b of the cutting plate 5. This results in uniform wear of the cutting plate 5 and cutting pins 6, 7 during drilling.
  • the rock drill shown in FIG. 4 which is somewhat larger in diameter, consists of a shaft 11 and an associated one, which projects beyond the shaft 11 in the radial direction, a total of 12 designated drill heads.
  • a separate conveyor helix 13 is arranged on the shaft 11.
  • the drill head 12 is provided with a centrally arranged cutting plate 15 on its end face 12a directed in the feed direction.
  • the rotating surface of the cutting plate 15 which arises when the rock drill is rotated is shown in dash-dotted lines.
  • the drill head 12 is also equipped with cutting pins 16, 17, 18, 19 on the end face 12a and on the circumference.
  • the cutting pins 17, 19 are arranged inclined to the drill axis.
  • the cutting pin 16, however, is arranged parallel to the drill axis.
  • the cutting pin 18 is arranged perpendicular to the drill axis and projects beyond the circumferential contour of the drill head 12.
  • the cutting pin 18 is in contact with the borehole wall during drilling and can be used, for example, to roughen it during the drilling process.
  • the cutting pins 16, 17, 18, 19 are arranged on different radii. This results in a good size reduction of the drilling material and an even distribution of the forces on the individual cutting pins. In this rock drill, too, the cutting pins 16, 17, 18, 19 are inserted so deeply into the drilling head 12 that their free end face lies in the rotational surface formed by the cutting edges of the cutting plate 15.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Steroid Compounds (AREA)
  • Drilling Tools (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Electrotherapy Devices (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

An axially elongated rock drill includes an axially extending shank and a drill head on one end of the shank. The drill head has a drill face extending transversely of the axial direction of the rock drill. A hard metal cutting plate and hard metal cutting pins are set in the drill face. The cutting pins reduce the wear on the cutting plate and afford better support of the drill. The cutting pins are arranged, in part, parallel to the axis of the drill, and, in part, inclined to the drill axis. The cutting plate has a cutting edge which generates a cutting plane as the drill is rotated with the ends of the cutting pins projecting from the drill face being located in the generated cutting plane.

Description

Die Erfindung betrifft einen Gesteinsbohrer mit Schaft und diesen radial überragenden Bohrkopf, mit einer in Vorschubrichtung weisenden Stirnseite.The invention relates to a rock drill with a shaft and this radially projecting drill head, with an end face pointing in the feed direction.

Gesteinsbohrer werden zur Herstellung von Bohrungen in Fels, Beton, Mauerwerk und dgl. eingesetzt, welche der Aufnahme von Befestigungselementen, dem Durchführen von Rohren und Kabeln sowie zum Sprengen dienen. Bisher sind bei den mit Hartmetall-Einsätzen versehenen Gesteinsbohrern hauptsächlich zwei unterschiedliche Bauarten bekannt.Rock drills are used to drill holes in rock, concrete, masonry and the like, which are used to hold fasteners, pass through pipes and cables and to blow up. So far, two different types of rock drill bits with carbide inserts have mainly been known.

Aus der EP-A-0 048 908 bekannte Gesteinsbohrer, die eine oder mehrere Schneidplatten aufweisen sind in ihrer Herstellung relativ einfach und werden hauptsächlich in kleinen Dimensionen bis zu einem Durchmesser von etwa 35 mm verwendet. Diese Bohrer weisen jedoch den Nachteil auf, dass die Schneiden der Schneidplatten, insbesondere im äusseren Bereich, rasch verschleissen und damit der Bohrfortschritt schnell abnimmt. Durch den Eckenverschleiss wird auch die Handhabung verschlechtert.Rock drills known from EP-A-0 048 908, which have one or more cutting plates, are relatively simple to manufacture and are mainly used in small dimensions up to a diameter of approximately 35 mm. However, these drills have the disadvantage that the cutting edges of the cutting plates, particularly in the outer area, wear out quickly and so that the drilling progress decreases quickly. Handling is also impaired by the corner wear.

Insbesondere für grössere Bohrdurchmesser ist es beispielsweise aus der DE-OS 2 528 003 bekannt, die in Vorschubrichtung weisende Stirnseite des Bohrkopfes mit Schneidstiften aus Hartmetall zu versehen. Diese Schneidstifte liefern aufgrund der kleinen Auflagefläche hohe Drücke auf das zu bearbeitende Material und führen zu besserem Bohrfortschritt. Im Gegensatz zu einer Schneidplatte können einzelne Schneidstifte jedoch nur aufwendig nachgeschliffen werden. Zudem lässt sich durch die Anordnung solcher Schneidstifte nur eine schlechte Zentrierung des Bohrers beim Anbohren erreichen. Bei Zerstörung oder Ausbruch einzelner Schneidstifte werden diese Gesteinsbohrer unbrauchbar, da die Stifte praktisch nicht ersetzt werden können.For larger drilling diameters in particular, it is known, for example from DE-OS 2 528 003, to provide the end face of the drilling head pointing in the feed direction with cutting pins made of hard metal. Due to the small contact area, these cutting pins deliver high pressures on the material to be machined and lead to better drilling progress. In contrast to a cutting insert, individual cutting pins can only be reground with great effort. In addition, the arrangement of such cutting pins means that the drill can only be poorly centered when drilling. If individual cutting pins are destroyed or broken out, these rock drills become unusable because the pins can practically not be replaced.

Der Erfindung liegt die Aufgabe zugrunde, einen wirtschaftlich herstellbaren Gesteinsbohrer zu schaffen, der bei hoher Abbauleistung eine gute Abfuhr des Bohrgutes und die Einhaltung einer genauen Bohrlochgeometrie ermöglicht.The invention has for its object to provide an economically producible rock drill that allows good removal of the drill material and compliance with an accurate drill hole geometry with high mining performance.

Gemäss Erfindung wird die Aufgabe dadurch gelöst, dass die Abfuhrnuten in Längsrichtung des Bohrkopfes verlaufen und die Stirnseite des Bohrkopfes mit Schneidstiften aus Hartmetall versehen ist, wobei die freien Stirnenden der Schneidstifte in der von den Schneiden der Schneidplatte gebildeten Rotationsfläche liegen.According to the invention, the object is achieved in that the discharge grooves run in the longitudinal direction of the drill head and the end face of the drill head is provided with cutting pins made of hard metal, the free ends of the cutting pins lying in the rotational surface formed by the cutting edges of the cutting plate.

Die Schneidplatte führt insbesondere zu eine guten Anbohrverhalten des Gesteinsbohrers in Verbindung mit einem daran anschliessenden guten Rundlauf, der die Einhaltung einer genauen Bohrlochgeometrie gewährleistet. Durch die zusätzliche Anordnung der Schneidstifte wird erreicht, dass Schneidplatte und Schneidstifte im wesentlich gleichzeitig dem zu bearbeitenden Material zugeführt werden und somit die Schneiden der Schneidplatte weniger stark verschleissen und damit auch der Bohrfortschritt langsamer abfällt. Hierzu dient insbesondere die Massgabe, dass die freien Stirnenden der Schneidstifte in der von den Schneiden der Schneidplatte gebildeten Rotationsfläche liegen. Damit ist sichergestellt, dass Schneidplatte und Schneidstifte gleichzeitig an dem zu bearbeitenden Material angreifen. Der Verschleiss von Schneidplatte und Schneidstiften wird somit gering gehalten, was sich positiv auf den Bohrfortschritt auswirkt.The cutting insert leads in particular to a good drilling behavior of the rock drill in connection with a subsequent good concentricity, which ensures that a precise drill hole geometry is maintained. The additional arrangement of the cutting pins ensures that the cutting plate and cutting pins are supplied to the material to be machined at substantially the same time, and so the cutting edges of the cutting plate are less worn and the drilling progress also slows down. In particular, the requirement that the free end faces of the cutting pins lie in the rotational surface formed by the cutting edges of the cutting plate serves for this purpose. This ensures that the insert and cutting pins attack the material to be machined at the same time. The wear of the insert and cutting pins is thus kept low, which has a positive effect on the drilling progress.

In bekannter Weise handelt es sich um eine Schneidplatte mit zueinander dachförmig geneigten Schneiden, wobei die Neigung dieser Schneiden zueinander unter einem stumpfen Winkel verlaufen. Insbesondere zur Aufrechterhaltung des guten Rundlaufes überragt die Schneide in bekannter Weise die Umfangskontur des Bohrkopfes.In a known manner, it is a cutting insert with cutting edges inclined towards each other in a roof-shaped manner, the inclination of these cutting edges relative to one another extending at an obtuse angle. In particular, in order to maintain good concentricity, the cutting edge projects beyond the circumferential contour of the drill head in a known manner.

Aus Gründen einer einfachen Herstellung des Gesteinsbohrers kann wenigstens ein Teil der Schneidstifte parallel zur Bohrerachse angeordnet sein. Da die Schneidstifte hauptsächlich in Richtung der Bohrerachse beansprucht werden, ergibt eine solche Anordnung der Schneidstifte eine gute Abstützung im Bohrkopf. Durch die Anordnung der Schneidstifte parallel zur Bohrerachse können diese auch relativ nahe an der Schneidplatte angeordnet werden. Aus der Sicht der Zerkleinerung des Bohrgutes kann wenigstens ein Teil der Schneidstifte zur Bohrerachse geneigt angeordnet sein. Beispielsweise bei einer kegelförmig ausgebildeten Stirnseite des Bohrkopfes können die Schneidstifte etwa senkrecht zur Oberfläche des Bohrkopfes angeordnet werden, was eine maximale Einbettung der Schneidstifte ermöglicht.For reasons of simple manufacture of the rock drill, at least some of the cutting pins can be arranged parallel to the drill axis. Since the cutting pins are mainly stressed in the direction of the drill axis, such an arrangement of the cutting pins provides good support in the drill head. By arranging the cutting pins parallel to the drill axis, they can also be arranged relatively close to the cutting plate. From the point of view of comminution of the drill material, at least some of the cutting pins can be arranged inclined to the drill axis. For example, in the case of a conical end face of the drilling head, the cutting pins can be arranged approximately perpendicular to the surface of the drilling head, which enables the cutting pins to be embedded to a maximum.

Ebenfalls vom Gesichtspunkt der Zerkleinerung des Bohrgutes her betrachtet ist vorteilhafterweise wenigstens ein Teil der Schneidstifte auf unterschiedlichen Radien angeordnet.Also from the point of view of comminuting the drilling material, at least some of the cutting pins are advantageously arranged on different radii.

Zweckmässigerweise überragt ein Teil der Schneidstifte die Umfangskontur des Bohrkopfes. Diese, die Umfangskontur überragenden Schneidstifte verhindern ein Verdichten und Verklemmen des Bohrgutes zwischen dem Bohrkopf und der Wandung des Bohrloches. Ausserdem fördern diese Schneidstifte die Schaffung einer hochwertigen Bohrlochwandung und stellen die Einhaltung der genauen Bohrlochgeometrie sicher.A part of the cutting pins expediently projects beyond the circumferential contour of the drill head. These cutting pins, which protrude beyond the circumferential contour, prevent the drill material from being compressed and jammed between the drill head and the wall of the borehole. In addition, these cutting pins promote the creation of a high-quality borehole wall and ensure compliance with the exact borehole geometry.

Die freien Stirnenden der Schneidstifte liegen vorteilhafterweise in der von den Schneiden der Schneidplatte gebildeten Rotationsfläche. Der Angriff des Gesteinsbohrers an dem zu bearbeitenden Material erfolgt somit gleichzeitig durch die Schneidplatte und die Schneidstifte. Dadurch wird der Verschleiss der Schneidplatte und Schneidstifte gering gehalten und der Bohrfortschritt somit nur wesentlich verlangsamt.The free ends of the cutting pins advantageously lie in the rotational surface formed by the cutting edges of the cutting plate. The rock drill thus attacks the material to be machined simultaneously by the cutting plate and the cutting pins. As a result, the wear of the cutting plate and cutting pins is kept low and the drilling progress is only slowed down considerably.

Die Härte der Schneidstifte ist mit Vorteil auf diejenige der Schneidplatte abgestimmt, so dass die Schneidplatte und die Schneidstifte etwa gleichmässig abgenützt werden und die Eingriffsverhältnisse somit erhalten bleiben.The hardness of the cutting pins is advantageously matched to that of the cutting plate, so that the cutting plate and the cutting pins are worn approximately uniformly and the engagement conditions are thus maintained.

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

Fig. 1
einen erfindungsgemässen Gesteinsbohrer, in Ansicht,
Fig. 2
eine stirnseitige Ansicht des in Fig. 1 dargestellten Gesteinsbohrers,
Fig. 3
einen Schnitt durch den Gesteinsbohrer gemäss Fig. 1 und 2, entlang der Line III-III in Fig. 2,
Fig. 4
eine weitere Ausführung eines erfindungsgemässen Gesteinsbohrers.
The invention will be explained in more detail below with reference to the drawings, for example. Show it:
Fig. 1
a rock drill according to the invention, in view,
Fig. 2
2 shows an end view of the rock drill shown in FIG. 1,
Fig. 3
2 shows a section through the rock drill according to FIGS. 1 and 2, along the line III-III in FIG. 2,
Fig. 4
a further embodiment of a rock drill according to the invention.

Der aus den Fig. 1 bis 3 ersichtliche Gesteinsbohrer besteht im wesentlichen aus einem Schaft 1 und einem damit verbundenen, insgesamt mit 2 bezeichneten Bohrkopf. Der Schaft 1 ist mit einer Förderwendel 3 versehen, die einerseits der Führung des Bohrers im Bohrloch und andererseits der Abfuhr des Bohrkleins dient.The rock drill shown in FIGS. 1 to 3 essentially consists of a shank 1 and an associated drill head, designated overall by 2. The shaft 1 is provided with a conveying helix 3, which serves on the one hand to guide the drill in the borehole and on the other hand to remove the cuttings.

Der Bohrkopf 2 ist mit in Längsrichtung verlaufenden Abfuhrnuten 4 versehen, welche dem Durchlass des Bohrkleins von der in Vorschubrichtung weisenden Stirnseite 2a des Bohrkopfes 2 zum Schaft 1 dienen. Der Bohrkopf 2 ist mit einer zentral angeordneten Schneidplatte 5 versehen. Die Schneidplatte 5 überragt den Bohrkopf 2 sowohl in radialer Richtung als auch in Vorschubrichtung. Die restliche Stirnseite 2a des Bohrkopfes 2 ist mit Schneidstiften 6, 7 versehen.The drill head 2 is provided with discharge grooves 4 running in the longitudinal direction, which serve for the passage of the cuttings from the end face 2a of the drill head 2 pointing in the feed direction to the shank 1. The drill head 2 is provided with a centrally arranged cutting plate 5. The cutting plate 5 projects beyond the drilling head 2 both in the radial direction and in the feed direction. The remaining end face 2a of the drill head 2 is provided with cutting pins 6, 7.

Wie insbesondere der in Fig. 3 dargestellte Schnitt deutlich zeigt, ist der Schneidstift 6 so angeordnet, dass er parallel zur Bohrerachse verläuft, während der Schneidstift 7 zur Bohrerachse geneigt angeordnet ist. Die Schneidstifte 6, 7 sind so tief in den Bohrkopf 2 eingelassen, dass die freien Stirnenden der Schneidstifte 6, 7 in der von den Schneiden 5a, 5b der Schneidplatte 5 gebildeten Rotationsfläche liegen. Dadurch wird beim Bohren eine gleichmässige Abnutzung von Schneidplatte 5 und Schneidstiften 6, 7 erreicht.As the section shown in FIG. 3 in particular clearly shows, the cutting pin 6 is arranged such that it runs parallel to the drill axis, while the cutting pin 7 is arranged inclined to the drill axis. The cutting pins 6, 7 are inserted so deeply into the drilling head 2 that the free ends of the cutting pins 6, 7 lie in the rotational surface formed by the cutting edges 5a, 5b of the cutting plate 5. This results in uniform wear of the cutting plate 5 and cutting pins 6, 7 during drilling.

Der aus Fig. 4 ersichtliche, im Durchmesser etwas grössere Gesteinsbohrer besteht aus einem Schaft 11 und einem damit verbundenen, den Schaft 11 in radialer Richtung überragenden, insgesamt mit 12 bezeichneten Bohrkopf. Auf dem Schaft 11 ist eine separate Förderwendel 13 angeordnet. Der Bohrkopf 12 ist an seiner in Vorschubrichtung gerichteten Stirnseite 12a mit einer zentral angeordneten Schneidplatte 15 versehen. Die beim Drehen des Gesteinsbohrers entstehende Rotationsfläche der Schneidplatte 15 ist strich-punktiert dargestellt. Neben der Schneidplatte 15 ist der Bohrkopf 12 an der Stirnseite 12a sowie am Umfang auch mit Schneidstiften 16, 17, 18, 19 bestückt. Die Schneidstifte 17, 19 sind zur Bohrerachse geneigt angeordnet. Der Schneidstift 16 ist dagegen parallel zur Bohrerachse angeordnet. Der Schneidstift 18 ist senkrecht zur Bohrerachse angeordnet und überragt die Umfangskontur des Bohrkopfes 12. Der Schneidstift 18 steht beim Bohren in Kontakt mit der Bohrlochwandung und kann beim Bohrvorgang beispielsweise dazu dienen, diese aufzurauhen. Die Schneidstifte 16, 17, 18, 19 sind auf unterschiedlichen Radien angeordnet. Dies ergibt eine gute Zerkleinerung des Bohrgutes und eine gleichmässige Verteilung der Kräfte auf die einzelnen Schneidstifte. Auch bei diesem Gesteinsbohrer sind die Schneidstifte 16, 17, 18, 19 so tief in den Bohrkopf 12 eingesetzt, dass ihr freies Stirnende in der von den Schneiden der Schneidplatte 15 gebildeten Rotationsfläche liegen.The rock drill shown in FIG. 4, which is somewhat larger in diameter, consists of a shaft 11 and an associated one, which projects beyond the shaft 11 in the radial direction, a total of 12 designated drill heads. A separate conveyor helix 13 is arranged on the shaft 11. The drill head 12 is provided with a centrally arranged cutting plate 15 on its end face 12a directed in the feed direction. The rotating surface of the cutting plate 15 which arises when the rock drill is rotated is shown in dash-dotted lines. In addition to the cutting plate 15, the drill head 12 is also equipped with cutting pins 16, 17, 18, 19 on the end face 12a and on the circumference. The cutting pins 17, 19 are arranged inclined to the drill axis. The cutting pin 16, however, is arranged parallel to the drill axis. The cutting pin 18 is arranged perpendicular to the drill axis and projects beyond the circumferential contour of the drill head 12. The cutting pin 18 is in contact with the borehole wall during drilling and can be used, for example, to roughen it during the drilling process. The cutting pins 16, 17, 18, 19 are arranged on different radii. This results in a good size reduction of the drilling material and an even distribution of the forces on the individual cutting pins. In this rock drill, too, the cutting pins 16, 17, 18, 19 are inserted so deeply into the drilling head 12 that their free end face lies in the rotational surface formed by the cutting edges of the cutting plate 15.

Claims (5)

  1. Rock drill comprising a shaft (1, 11) and a drillhead (2, 12) which radially protrudes the latter and with one end (2a, 12a) which is oriented in the thrust direction, and with the drillhead (2, 12) having removal grooves (4) which are open towards the shaft (1, 11) as well as a cutter plate (5, 15) which extends over the entire diameter and protrudes over the peripheral contour, with two cutting edges (5a, 5b) which are rooflike slanted towards each other at an obtuse angle, characterised in that the removal grooves (4) extend in the longitudinal direction of the drillhead (2) and that the end (2a, 12a) of the drillhead (2, 12) is provided with cutting pins (6, 7, 16, 17, 18, 19) of hard metal, and that the free ends of the cutting pins (6, 7, 16, 17, 18, 19) are positioned in the rotational surface which is formed by the cutters (5a, 5b) of the cutter plate (5, 15).
  2. Rock drill according to claim 1, characterised in that at least a portion of the cutting pins (6, 16) is arranged parallel to the drill axis.
  3. Rock drill according to claim 1 or 2, characterised in that at least a portion of the cutting pins (7, 17, 18, 19) is arranged at a slant relative to the drill axis.
  4. Rock drill according to one of claims 1 to 3, characterised in that at least a portion of the cutting pins (6, 7, 16, 17, 18, 19) is arranged on different radii.
  5. Rock drill according to one of claims 1 to 4, characterised in that a portion of the cutting pins (8, 19) protrudes over the peripheral contour of the drillhead (12).
EP86810551A 1985-12-16 1986-12-01 Rock drill bit Expired - Lifetime EP0226537B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3544433A DE3544433C2 (en) 1985-12-16 1985-12-16 Rock drill
DE3544433 1985-12-16

Publications (3)

Publication Number Publication Date
EP0226537A2 EP0226537A2 (en) 1987-06-24
EP0226537A3 EP0226537A3 (en) 1988-11-23
EP0226537B1 true EP0226537B1 (en) 1994-06-08

Family

ID=6288555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810551A Expired - Lifetime EP0226537B1 (en) 1985-12-16 1986-12-01 Rock drill bit

Country Status (10)

Country Link
US (1) US4765419A (en)
EP (1) EP0226537B1 (en)
JP (2) JPS62141293A (en)
AT (1) ATE106985T1 (en)
AU (1) AU587514B2 (en)
CA (1) CA1266651A (en)
DE (2) DE3544433C2 (en)
DK (1) DK173050B1 (en)
ES (1) ES2056047T3 (en)
FI (1) FI81295C (en)

Families Citing this family (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1324013C (en) * 1987-02-09 1993-11-09 Vermont American Corporation Masonary drill tip with strong and chamfered cutting edges
DE3707798A1 (en) * 1987-03-11 1988-09-22 Hawera Probst Kg Hartmetall ROCK DRILL
US4883135A (en) * 1987-09-18 1989-11-28 Hawera Probst Gmbh & Co. Apparatus for rock drill
EP0322554B1 (en) * 1987-12-01 1992-11-04 Hawera Probst GmbH + Co. Rock drill bit
DE3742661A1 (en) * 1987-12-16 1989-07-13 Hawera Probst Kg Hartmetall ROCK DRILL
US5004056A (en) * 1988-05-23 1991-04-02 Goikhman Yakov A Percussion-rotary drilling tool
AU612270B2 (en) * 1988-05-23 1991-07-04 Krasnoyarsky Filial Vsesojuznogo Nauchno-Proizvodstvennogo Obiedinenia Stroitelnykh I Dorozhnykh Mashin Percussion rotary drilling tool
DE3820695C2 (en) * 1988-06-18 1996-07-25 Hawera Probst Kg Hartmetall Rock drill
DE3825107C2 (en) * 1988-07-23 1996-07-11 Hilti Ag Rock drill with cutting insert
JP2784830B2 (en) * 1989-09-04 1998-08-06 ソニー株式会社 Headphones
JPH0746469Y2 (en) * 1989-10-25 1995-10-25 新日本製鐵株式会社 Drill bit
JPH0810517Y2 (en) * 1989-10-25 1996-03-29 新日本製鐵株式会社 Drill bit
DE4032066C2 (en) * 1990-10-05 1999-04-15 Siegfried Treitz Arrangement and fastening of pin-shaped cutting inserts in rock drill bits
DE4101458A1 (en) * 1991-01-19 1992-07-23 Wolf Thomas FOR A CUTTING DRILL DRIVER DESIGNED WITH AXIAL PRESSURE AND BLOCKING
US5918105A (en) * 1994-12-12 1999-06-29 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
TW299385B (en) 1994-12-12 1997-03-01 Black & Decker Inc Cutting tools for drilling concrete, aggregate, masonry or the like materials
US5575342A (en) * 1995-05-26 1996-11-19 Sandvik Ab Percussion drill bit, an insert for use therein and a method of drilling a bore
US5641028A (en) * 1995-08-10 1997-06-24 Black & Decker Inc. Drill bit with debris conveying flute
DE19537900B4 (en) * 1995-10-11 2005-11-03 Irwin Industrial Tool Company (N.D.Ges.D. Staates Delaware), Freeport rotary drill
DE19545647A1 (en) * 1995-12-07 1997-06-12 Hilti Ag Rotary impact twist drill
DE19545646A1 (en) * 1995-12-07 1997-06-12 Hilti Ag Rotary impact twist drill
US5732784A (en) * 1996-07-25 1998-03-31 Nelson; Jack R. Cutting means for drag drill bits
US6044919A (en) * 1997-07-31 2000-04-04 Briese Industrial Technologies, Inc. Rotary spade drill arrangement
US6039127A (en) * 1998-03-13 2000-03-21 Loudon Enterprises, Inc. Rock drill
EP0943780A3 (en) * 1998-03-18 2000-07-19 Plica Werkzeugfabrik Ag Drilling tool
US20020164218A1 (en) * 2001-02-28 2002-11-07 Ruben Aguirre Fluted drill tool with frustum cutters
RU2231614C2 (en) * 2002-05-28 2004-06-27 Чувилин Анатолий Михайлович Crown bit
RU2252306C2 (en) * 2002-07-22 2005-05-20 Северо-Кавказский государственный технологический университет (СКГТУ) Chisel for striking-rotary drilling
DE10351183A1 (en) * 2003-11-03 2005-06-02 Illinois Tool Works Inc., Glenview rock drill
USD525272S1 (en) * 2003-12-24 2006-07-18 Robert Bosch Gmbh Rotary impact drill bit
US8522897B2 (en) 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US7571780B2 (en) 2006-03-24 2009-08-11 Hall David R Jack element for a drill bit
ES2308627T3 (en) * 2006-04-26 2008-12-01 Bauer Maschinen Gmbh PERFORATION POINT.
US7637574B2 (en) * 2006-08-11 2009-12-29 Hall David R Pick assembly
US8622155B2 (en) 2006-08-11 2014-01-07 Schlumberger Technology Corporation Pointed diamond working ends on a shear bit
US9145742B2 (en) * 2006-08-11 2015-09-29 Schlumberger Technology Corporation Pointed working ends on a drill bit
US8714285B2 (en) 2006-08-11 2014-05-06 Schlumberger Technology Corporation Method for drilling with a fixed bladed bit
US8292372B2 (en) 2007-12-21 2012-10-23 Hall David R Retention for holder shank
US8616305B2 (en) * 2006-08-11 2013-12-31 Schlumberger Technology Corporation Fixed bladed bit that shifts weight between an indenter and cutting elements
US9051795B2 (en) * 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US8567532B2 (en) 2006-08-11 2013-10-29 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US8590644B2 (en) 2006-08-11 2013-11-26 Schlumberger Technology Corporation Downhole drill bit
US8960337B2 (en) 2006-10-26 2015-02-24 Schlumberger Technology Corporation High impact resistant tool with an apex width between a first and second transitions
JP4890515B2 (en) * 2008-08-08 2012-03-07 ウエタックス株式会社 Speaker
JP4662508B1 (en) * 2010-03-01 2011-03-30 株式会社オーディオテクニカ earphone
WO2013114864A1 (en) 2012-01-30 2013-08-08 パナソニック株式会社 Earphone
US8976994B2 (en) 2012-06-20 2015-03-10 Apple Inc. Earphone having an acoustic tuning mechanism
US9712905B2 (en) 2012-06-20 2017-07-18 Apple Inc. Headsets with non-occluding earbuds
US8971561B2 (en) 2012-06-20 2015-03-03 Apple Inc. Earphone having a controlled acoustic leak port
US9258663B2 (en) 2012-09-07 2016-02-09 Apple Inc. Systems and methods for assembling non-occluding earbuds
EP3073758B1 (en) 2013-11-19 2021-05-19 Sony Corporation Headphone and acoustic characteristic adjustment method
AU2017213176B2 (en) 2016-01-29 2018-10-04 Nobel Biocare Services Ag Dentistry tool
GB201706687D0 (en) * 2017-04-27 2017-06-14 Rolls Royce Plc A cutting tool
CN115263194A (en) * 2022-08-16 2022-11-01 武汉工程大学 One-step forming drill bit and method for drilling based on mine blasting blasthole
US12244990B2 (en) 2022-09-01 2025-03-04 Apple Inc. Acoustic vent and protective membrane
US12133038B2 (en) 2022-09-01 2024-10-29 Apple Inc. Acoustic vent and protective membrane

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1056132A (en) * 1911-05-05 1913-03-18 Nikolaus Staub Rock-drill.
FR1006219A (en) * 1947-12-05 1952-04-21 Sharpener with extra hard insert
CH311119A (en) * 1953-09-02 1955-11-30 Dionisotti Joseph Foil for perforating rocks.
US3163246A (en) * 1963-04-18 1964-12-29 Westinghouse Air Brake Co Rock drill bit
US3283837A (en) * 1965-02-01 1966-11-08 Acme Fishing Tool Company Drill bit
US3589456A (en) * 1969-08-25 1971-06-29 Acme Fishing Tool Co Drill bit
SU636384A1 (en) * 1974-02-06 1978-12-05 Институт Горного Дела Со Ан Ссср Bit for percussion-rotary drilling
DE2510265A1 (en) * 1975-03-08 1976-09-16 Richard Karnebogen Drilling bit for masonry drilling machine - has central conical convex cutting surface with hard metal inserts
DE2528003A1 (en) * 1975-06-24 1977-01-20 Krupp Gmbh ROCK DRILLS
DE2542001A1 (en) * 1975-09-20 1977-03-24 Bosch Gmbh Robert Drill for hard materials, esp. concrete - has hard surface layer and is suitable for do-it-yourself applications
DE2601302A1 (en) * 1976-01-15 1977-07-21 Richard Karnebogen Percussive rock drill bit - has four cutters along arms of angled cross offset from bit centre and fifth cutter pointed to cross intercept
JPS6014B2 (en) * 1977-09-05 1985-01-05 日東化学工業株式会社 Method for removing water-soluble proteins, etc. from shredded meat
DE2856205A1 (en) * 1978-12-27 1980-07-10 Hilti Ag Rock drill head assembly - has protruding steel insets in ring segments with axial grooves and central recess
DE3004077C2 (en) * 1980-02-05 1986-12-18 Robert Bosch Gmbh, 7000 Stuttgart Drill bit
DE8025800U1 (en) * 1980-09-26 1981-02-05 Hawera Probst Gmbh + Co, 7980 Ravensburg DRILL
DE3044775A1 (en) * 1980-11-27 1982-07-08 Hilti AG, 9494 Schaan ROCK DRILL
AU1111183A (en) * 1982-02-03 1983-08-11 Witzand, H.H.G. Drill bit

Also Published As

Publication number Publication date
DE3689900D1 (en) 1994-07-14
ATE106985T1 (en) 1994-06-15
DE3544433C2 (en) 1995-12-14
DK603586D0 (en) 1986-12-15
JPH086865Y2 (en) 1996-02-28
FI865068L (en) 1987-06-17
ES2056047T3 (en) 1994-10-01
AU6647586A (en) 1987-06-18
DK603586A (en) 1987-06-17
JPH0720386U (en) 1995-04-11
EP0226537A2 (en) 1987-06-24
US4765419A (en) 1988-08-23
FI81295C (en) 1990-10-10
CA1266651A (en) 1990-03-13
DE3544433A1 (en) 1987-06-19
JPS62141293A (en) 1987-06-24
EP0226537A3 (en) 1988-11-23
FI865068A0 (en) 1986-12-12
FI81295B (en) 1990-06-29
DK173050B1 (en) 1999-12-06
AU587514B2 (en) 1989-08-17

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