EP1225300A2 - Rock drill bit - Google Patents

Rock drill bit Download PDF

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Publication number
EP1225300A2
EP1225300A2 EP02405004A EP02405004A EP1225300A2 EP 1225300 A2 EP1225300 A2 EP 1225300A2 EP 02405004 A EP02405004 A EP 02405004A EP 02405004 A EP02405004 A EP 02405004A EP 1225300 A2 EP1225300 A2 EP 1225300A2
Authority
EP
European Patent Office
Prior art keywords
cutting edge
rock drill
secondary cutting
drill according
arcuate
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.)
Granted
Application number
EP02405004A
Other languages
German (de)
French (fr)
Other versions
EP1225300B1 (en
EP1225300A3 (en
Inventor
Martin Schautt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP1225300A2 publication Critical patent/EP1225300A2/en
Publication of EP1225300A3 publication Critical patent/EP1225300A3/en
Application granted granted Critical
Publication of EP1225300B1 publication Critical patent/EP1225300B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention designates an at least partially rotating and striking one Hand tool driven rock drill for the abrasive removal of rock and rock-like material like concrete.
  • Rock drills for hand tools have one end of the shaft Inserting end and at the other end a tool head with cutting edges made of hard material.
  • the tool head has cutting plates or cutting bits made of hard material or is in the form of compact solid hard head.
  • a disadvantage is that with reinforcing iron hits in Concrete increases the stress on the cutting edge, especially in training with a acute wedge angle suitable for high drilling performance.
  • a tool head provided with rinsing holes has one Rock drill two to one main insert, with respect to the minor cutting edge parallel, radially offset secondary cutting inserts.
  • EP607958A1 there are two in a rock drill for hand tools with respect to the minor cutting edge, minor cutting plates oriented differently spaced radially from the main insert.
  • a rock drill for hand tools with compact Solid hard head a diametrically running main cutting edge and exclusively in the radial outer area arranged, trailing at an acute angle with respect to the direction of rotation, Minor cutting edges whose minor cutting edge extends radially.
  • the object of the invention is to reduce the risk of breakage Solid hard head for rebar hits. Another aspect is one Increase lifespan.
  • the solid hard head of a rock drill for hand tool devices essentially has one main cutting edge and at least one radially exclusively in the outer area arranged secondary cutting edge with an arcuate secondary cutting edge.
  • the arcuate minor cutting edge of the minor sheath is advantageous circumferentially axially rounded, so that when a reinforcing iron hits the Rock drill on this secondary cutting edge and the cutting surfaces on both sides axially is lifted off.
  • the solid hard head advantageously has two secondary cutting edges, which are further advantageous are arranged symmetrically to the main cutting edge, which reduces the vibration noise become.
  • the main cutting edge advantageously has two diametrically offset cutting edges, which as Tip converge in a roof edge, which results in a stable drilling behavior results.
  • the secondary cutting edges are advantageous axially behind the envelope of the main cutting edges reset, which increases the drilling performance due to a higher force on the main cutting edge elevated.
  • the secondary cutting edges advantageously form an acute wedge angle in the radial plane between 50 ° and 80 °, which makes the cutting edges aggressive in hard surfaces can penetrate and increase the drilling capacity.
  • the secondary cutting edges are advantageous in terms of the length of their arcuate ones Secondary cutting edge (4a, 4b) formed such that they have the same dimensions as the Main cutting edges are worn axially, resulting in a long service life Drilling performance is achieved.
  • the solid hard head 1 shown in supervision does not have one further shown rock drill for hand tools a main cutting edge 2 and two diametrically offset, symmetrical to the main cutting edge 2, radially only in the outer Area, arranged secondary cutting edges 3a, 3b, each with an arcuate, axially rounded peripheral cutting edge 4a, 4b.
  • the main cutting edge 2 has two cutting edges 5a, 5b, which act as the tip of the rock drill in a roof edge 6 converge.
  • the secondary cutting edges 3a, 3b each have an arcuate arc length of approx. ⁇ / 4 rad.
  • the part of the solid head 1 shown in side view does not have one further illustrated rock drill for hand tools an axially to the axis of rotation A by the minor cutting edge residue x behind the envelope 7 of the main cutting edge 2 recessed secondary cutting edge 3a, which is transverse to the radial plane Secondary cutting edge 4a an acute wedge angle ⁇ of 65 ° to the two sides, partially Form concave shaped cutting surfaces 8a, 8b.

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

Abstract

Ein Gesteinsbohrer für Handwerkzeuggeräte mit einem Vollhartstoffkopf (1) mit einer Hauptschneide (2) und zumindest einer radial ausschliesslich im äusseren Bereich angeordneten Nebenschneide (3a, 3b), welche eine bogenförmig verlaufende Nebenschneidkante (4a, 4b) aufweist. <IMAGE>A rock drill for hand tools with a solid hard head (1) with a main cutting edge (2) and at least one secondary cutting edge (3a, 3b) arranged radially exclusively in the outer area, which has an arcuate secondary cutting edge (4a, 4b). <IMAGE>

Description

Die Erfindung bezeichnet einen zumindest teilweise drehend und schlagend von einem Handwerkzeuggerät angetriebenen Gesteinsbohrer zum abrasiven Abtrag von Gestein und gesteinsähnlichem Material wie Beton.The invention designates an at least partially rotating and striking one Hand tool driven rock drill for the abrasive removal of rock and rock-like material like concrete.

Gesteinsbohrer für Handwerkzeuggeräte weisen an einem Ende des Schafts ein Einsteckende und am anderen Ende einen Werkzeugkopf mit Schneiden aus Hartstoff auf. Der Werkzeugkopf weist dazu Schneidplatten oder Schneidbits aus Hartstoff auf oder ist als kompakter Vollhartstoffkopf ausgeführt. Nachteilig ist die bei Armierungseisentreffern im Beton erhöhte Beanspruchung der Schneidkante, insbesondere bei Ausbildungen mit einem für hohe Bohrleistungen geeigneten spitzen Keilwinkel.Rock drills for hand tools have one end of the shaft Inserting end and at the other end a tool head with cutting edges made of hard material. For this purpose, the tool head has cutting plates or cutting bits made of hard material or is in the form of compact solid hard head. A disadvantage is that with reinforcing iron hits in Concrete increases the stress on the cutting edge, especially in training with a acute wedge angle suitable for high drilling performance.

Nach der GB530113A weist ein mit Spülbohrungen versehener Werkzeugkopf eines Gesteinsbohrers zwei zu einer Hauptschneidplatte, bezüglich der Nebenschneidkante parallel orientierte, radial versetzte Nebenschneidplatten auf.According to GB530113A, a tool head provided with rinsing holes has one Rock drill two to one main insert, with respect to the minor cutting edge parallel, radially offset secondary cutting inserts.

Nach der EP607958A1 sind bei einem Gesteinsbohrer für Handwerkzeuggeräte zwei, bezüglich der Nebenschneidkante parallel orientierte, Nebenschneidplatten unterschiedlich radial zur Hauptschneidplatte beabstandet.According to EP607958A1 there are two in a rock drill for hand tools with respect to the minor cutting edge, minor cutting plates oriented differently spaced radially from the main insert.

Nach der US5492187 weist ein Gesteinsbohrer für Handwerkzeuggeräte mit kompaktem Vollhartstoffkopf eine diametral verlaufende Hauptschneide und ausschliesslich im radial äusseren Bereich angeordnete, bezüglich der Drehrichtung spitzwinkelig nachlaufende, Nebenschneiden auf, deren Nebenschneidkante sich radial erstreckt. Durch den schnelleren Verschleiss der axial vorstehenden Hauptschneide verringert sich deren axialer Vorstand, wodurch sich die Bohrleistung bzw. die Lebensdauer reduziert.According to US5492187, a rock drill for hand tools with compact Solid hard head a diametrically running main cutting edge and exclusively in the radial outer area arranged, trailing at an acute angle with respect to the direction of rotation, Minor cutting edges whose minor cutting edge extends radially. By the faster Wear of the axially protruding main cutting edge reduces its axial board, which reduces the drilling capacity and the service life.

Die Aufgabe der Erfindung besteht in der Verringerung der Bruchgefahr des Vollhartstoffkopfes bei Armierungseisentreffern. Ein weiterer Aspekt besteht in einer Erhöhung der Lebensdauer. The object of the invention is to reduce the risk of breakage Solid hard head for rebar hits. Another aspect is one Increase lifespan.

Die Aufgabe wird im wesentlichen durch die Merkmale der unabhängigen Ansprüche gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.The task is essentially solved by the features of the independent claims. Advantageous further developments result from the subclaims.

Im wesentlichen weist der Vollhartstoffkopf eines Gesteinsbohrers für Handwerkzeuggeräte eine Hauptschneide und zumindest eine radial ausschliesslich im äusseren Bereich angeordnete Nebenschneide mit einer bogenförmig verlaufenden Nebenschneidkante auf.The solid hard head of a rock drill for hand tool devices essentially has one main cutting edge and at least one radially exclusively in the outer area arranged secondary cutting edge with an arcuate secondary cutting edge.

Durch die bogenförmig verlaufende Nebenschneidkante der Nebenschneide ist diese in der bei Armierungseisentreffern hauptsächlich beanspruchten tangentialen Richtung länglich ausgeführt und weist somit bei Armierungseisentreffern eine hohe Beanspruchbarkeit und Lebensdauer auf.Due to the curved cutting edge of the cutting edge, this is in the elongated tangential direction for reinforcement iron hits executed and thus has a high strength and resistance to iron strikes Lifespan.

Vorteilhaft ist die bogenförmig verlaufende Nebenschneidkante der Nebenscheide umfänglich axial abgerundet ausgeführt, wodurch bei einem Armierungseisentreffer der Gesteinsbohrer an dieser Nebenschneidkante und den beidseitigen Schneidflächen axial abgehoben wird.The arcuate minor cutting edge of the minor sheath is advantageous circumferentially axially rounded, so that when a reinforcing iron hits the Rock drill on this secondary cutting edge and the cutting surfaces on both sides axially is lifted off.

Vorteilhaft weist der Vollhartstoffkopf zwei Nebenschneiden auf, die weiter vorteilhaft symmetrisch zur Hauptschneide angeordnet sind, wodurch die Vibrationsgeräusche reduziert werden.The solid hard head advantageously has two secondary cutting edges, which are further advantageous are arranged symmetrically to the main cutting edge, which reduces the vibration noise become.

Vorteilhaft weist die Hauptschneide zwei diametral versetzte Schneidkanten auf, welche als Spitze in einer Dachkante zusammenlaufen, wodurch sich ein stabiles Anbohrverhalten ergibt.The main cutting edge advantageously has two diametrically offset cutting edges, which as Tip converge in a roof edge, which results in a stable drilling behavior results.

Vorteilhaft sind die Nebenschneiden axial hinter die Hüllkurve der Hauptschneiden zurückgesetzt, wodurch sich durch eine höhere Kraft auf die Hauptschneide die Bohrleistung erhöht.The secondary cutting edges are advantageous axially behind the envelope of the main cutting edges reset, which increases the drilling performance due to a higher force on the main cutting edge elevated.

Vorteilhaft bilden die Nebenschneiden in der radialen Ebene einen spitzen Keilwinkel zwischen 50° und 80° aus, wodurch die Nebenschneiden aggressiv in harten Untergrund eindringen können und die Bohrleistung erhöhen.The secondary cutting edges advantageously form an acute wedge angle in the radial plane between 50 ° and 80 °, which makes the cutting edges aggressive in hard surfaces can penetrate and increase the drilling capacity.

Vorteilhaft sind die Nebenschneiden bezüglich der Länge ihrer bogenförmig verlaufenden Nebenschneidkante (4a, 4b) derart ausgebildet, dass sie im gleichen Masse wie die Hauptschneiden axial verschlissen werden, wodurch über eine hohe Lebensdauer eine hohe Bohrleistung erzielt wird. The secondary cutting edges are advantageous in terms of the length of their arcuate ones Secondary cutting edge (4a, 4b) formed such that they have the same dimensions as the Main cutting edges are worn axially, resulting in a long service life Drilling performance is achieved.

Die Erfindung wird bezüglich eines vorteilhaften Ausführungsbeispiels näher erläutert mit

  • Fig. 1 als Aufsicht des Vollhartstoffkopfes
  • Fig. 2 als Seitenansicht eines Teils des Vollhartstoffkopfes
    • The invention is explained in more detail with respect to an advantageous embodiment
  • Fig. 1 as a supervision of the solid head
  • Fig. 2 as a side view of part of the solid head

    • Nach der Fig. 1 weist der in Aufsicht dargestellte Vollhartstoffkopf 1 eines nicht weiter dargestellten Gesteinsbohrers für Handwerkzeuggeräte eine Hauptschneide 2 und zwei diametral versetzte, symmetrisch zur Hauptschneide 2, radial ausschliesslich im äusseren Bereich, angeordnete Nebenschneiden 3a, 3b mit je einer bogenförmig verlaufenden, umfänglich axial abgerundeten Nebenschneidkante 4a, 4b auf. Die Hauptschneide 2 weist zwei Schneidkanten 5a, 5b auf, welche als Spitze des Gesteinsbohrers in einer Dachkante 6 zusammenlaufen. Die Nebenschneiden 3a, 3b weisen je eine bogenförmige Bogenlänge von ca. π/4 rad auf.According to FIG. 1, the solid hard head 1 shown in supervision does not have one further shown rock drill for hand tools a main cutting edge 2 and two diametrically offset, symmetrical to the main cutting edge 2, radially only in the outer Area, arranged secondary cutting edges 3a, 3b, each with an arcuate, axially rounded peripheral cutting edge 4a, 4b. The main cutting edge 2 has two cutting edges 5a, 5b, which act as the tip of the rock drill in a roof edge 6 converge. The secondary cutting edges 3a, 3b each have an arcuate arc length of approx. π / 4 rad.

    Nach Fig. 2 weist der in Seitenansicht dargestellte Teil des Vollhartstoffkopfes 1 eines nicht weiter dargestellten Gesteinsbohrers für Handwerkzeuggeräte eine axial zur Drehachse A um den Nebenschneidenrückstand x hinter die Hüllkurve 7 der Hauptschneide 2 zurückgesetzte Nebenschneide 3a auf, welche in der radialen Ebene quer zur Nebenschneidkante 4a einen spitzen Keilwinkel α von 65° zu den beidseitigen, teilweise konkav geformten, Schneidflächen 8a, 8b ausbilden.According to FIG. 2, the part of the solid head 1 shown in side view does not have one further illustrated rock drill for hand tools an axially to the axis of rotation A by the minor cutting edge residue x behind the envelope 7 of the main cutting edge 2 recessed secondary cutting edge 3a, which is transverse to the radial plane Secondary cutting edge 4a an acute wedge angle α of 65 ° to the two sides, partially Form concave shaped cutting surfaces 8a, 8b.

    Claims (6)

    Gesteinsbohrer für Handwerkzeuggeräte mit einem Vollhartstoffkopf (1) mit einer Hauptschneide (2) und zumindest einer radial ausschliesslich im äusseren Bereich angeordneten Nebenschneide (3a, 3b), dadurch gekennzeichnet, dass die Nebenschneide (3a, 3b) eine bogenförmig verlaufende Nebenschneidkante (4a, 4b) aufweist.Rock drill for hand tools with a solid hard head (1) with a main cutting edge (2) and at least one secondary cutting edge (3a, 3b) arranged radially exclusively in the outer area, characterized in that the secondary cutting edge (3a, 3b) has an arcuate secondary cutting edge (4a, 4b ) having. Gesteinsbohrer nach Anspruch 1, dadurch gekennzeichnet, dass die bogenförmig verlaufende Nebenschneidkante (4a, 4b) der Nebenscheide (3a, 3b) umfänglich axial abgerundet ausgeführt ist.Rock drill according to claim 1, characterized in that the arcuate secondary cutting edge (4a, 4b) of the secondary sheath (3a, 3b) is axially rounded on the circumference. Gesteinsbohrer nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass die Hauptschneide (2) zwei diametral versetzte Schneidkanten (5a, 5b) aufweist, welche optional als Spitze in einer Dachkante (6) zusammenlaufen.Rock drill according to claim 1 or claim 2, characterized in that the main cutting edge (2) has two diametrically offset cutting edges (5a, 5b) which optionally converge as a tip in a roof edge (6). Gesteinsbohrer nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Nebenschneide (3a, 3b) axial hinter die Hüllkurve (7) der Hauptschneide (2) zurückgesetzt ist.Rock drill according to one of the preceding claims, characterized in that the secondary cutting edge (3a, 3b) is set back axially behind the envelope curve (7) of the main cutting edge (2). Gesteinsbohrer nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Nebenschneide (3a, 3b) in der radialen Ebene einen spitzen Keilwinkel (α) zwischen 50° und 80° ausbildet.Rock drill according to one of the preceding claims, characterized in that the secondary cutting edge (3a, 3b) forms an acute wedge angle (α) between 50 ° and 80 ° in the radial plane. Gesteinsbohrer nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Nebenschneide (3a, 3b) mit der Länge ihrer bogenförmig verlaufenden Nebenschneidkante (4a, 4b) auf einen, mit der Hauptschneide (2) gleichmassigen, axialen Verschleiss abstimmbar ist.Rock drill according to one of the preceding claims, characterized in that the minor cutting edge (3a, 3b) with the length of its arcuate minor cutting edge (4a, 4b) can be matched to axial wear which is uniform with the major cutting edge (2).
    EP02405004A 2001-01-17 2002-01-08 Rock drill bit Expired - Lifetime EP1225300B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10117262A DE10117262A1 (en) 2001-01-17 2001-01-17 Rock drill has head with main and subsidiary blades, curved and diametrically opposite cutting edges, and point
    DE10117262 2001-01-17

    Publications (3)

    Publication Number Publication Date
    EP1225300A2 true EP1225300A2 (en) 2002-07-24
    EP1225300A3 EP1225300A3 (en) 2003-11-19
    EP1225300B1 EP1225300B1 (en) 2006-05-10

    Family

    ID=7680683

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP02405004A Expired - Lifetime EP1225300B1 (en) 2001-01-17 2002-01-08 Rock drill bit

    Country Status (4)

    Country Link
    US (1) US6843334B2 (en)
    EP (1) EP1225300B1 (en)
    JP (1) JP3921089B2 (en)
    DE (2) DE10117262A1 (en)

    Cited By (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1854572A1 (en) * 2006-05-10 2007-11-14 HILTI Aktiengesellschaft Hard material drill head
    DE102006020538A1 (en) * 2006-05-03 2007-11-15 Irwin Industrial Tools Gmbh Drilling head for drilling tool and drilling tool
    EP1906082A1 (en) 2006-09-26 2008-04-02 Bäro GmbH & Co. KG Illumination installation
    DE202008014317U1 (en) 2008-10-28 2009-01-29 BÄRO GmbH & Co. KG lamp
    EP4375476A1 (en) * 2022-11-22 2024-05-29 Hilti Aktiengesellschaft Rock drill with five cutters

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    CA2486611C (en) * 2002-06-06 2008-03-18 Kabushiki Kaisha Miyanaga Drill bit
    US6883624B2 (en) * 2003-01-31 2005-04-26 Smith International, Inc. Multi-lobed cutter element for drill bit
    EP1687126B1 (en) * 2003-11-17 2007-07-25 Robert Bosch Gmbh Drilling and/or chiselling tool
    GB2427633B (en) * 2005-05-17 2007-08-15 Smith International Drill bit and method of designing a drill bit
    US7624825B2 (en) * 2005-10-18 2009-12-01 Smith International, Inc. Drill bit and cutter element having aggressive leading side
    DE102006000083A1 (en) * 2006-02-20 2007-08-23 Hilti Ag anchor drill head
    US7743855B2 (en) * 2006-09-05 2010-06-29 Smith International, Inc. Drill bit with cutter element having multifaceted, slanted top cutting surface
    DE102007000534A1 (en) * 2007-10-19 2009-04-23 Hilti Aktiengesellschaft percussion
    US7861807B2 (en) * 2008-12-03 2011-01-04 Black & Decker Inc. Drill bit including one piece cutting head
    US20140182947A1 (en) 2012-12-28 2014-07-03 Smith International, Inc. Cutting insert for percussion drill bit
    US11828108B2 (en) 2016-01-13 2023-11-28 Schlumberger Technology Corporation Angled chisel insert

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    Cited By (5)

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    Publication number Priority date Publication date Assignee Title
    DE102006020538A1 (en) * 2006-05-03 2007-11-15 Irwin Industrial Tools Gmbh Drilling head for drilling tool and drilling tool
    EP1854572A1 (en) * 2006-05-10 2007-11-14 HILTI Aktiengesellschaft Hard material drill head
    EP1906082A1 (en) 2006-09-26 2008-04-02 Bäro GmbH & Co. KG Illumination installation
    DE202008014317U1 (en) 2008-10-28 2009-01-29 BÄRO GmbH & Co. KG lamp
    EP4375476A1 (en) * 2022-11-22 2024-05-29 Hilti Aktiengesellschaft Rock drill with five cutters

    Also Published As

    Publication number Publication date
    DE50206710D1 (en) 2006-06-14
    JP3921089B2 (en) 2007-05-30
    JP2002273723A (en) 2002-09-25
    US20020108789A1 (en) 2002-08-15
    EP1225300B1 (en) 2006-05-10
    EP1225300A3 (en) 2003-11-19
    DE10117262A1 (en) 2002-07-18
    US6843334B2 (en) 2005-01-18

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