EP1225300B1 - Rock drill bit - Google Patents
Rock drill bit Download PDFInfo
- Publication number
- EP1225300B1 EP1225300B1 EP02405004A EP02405004A EP1225300B1 EP 1225300 B1 EP1225300 B1 EP 1225300B1 EP 02405004 A EP02405004 A EP 02405004A EP 02405004 A EP02405004 A EP 02405004A EP 1225300 B1 EP1225300 B1 EP 1225300B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- edge
- rock drill
- drill bit
- minor
- cutting edge
- 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
Links
- 239000011435 rock Substances 0.000 title claims description 17
- 230000001154 acute effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 description 9
- 238000005553 drilling Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 235000002505 Centaurea nigra Nutrition 0.000 description 1
- 241001073742 Mylopharodon conocephalus Species 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
Images
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 refers to a rock drill, at least partially rotating and hammering driven by a hand tool device, for the abrasive removal of rock and rock-like material, such as concrete.
- Rock drills for hand tools have at one end of the shaft a spigot and at the other end a tool head with cutting edges of hard material.
- the tool head has to cutting inserts or cutting bits made of hard material or is designed as a compact Vollhartstoffkopf.
- a disadvantage is the increased stress on the cutting edge in the case of reinforcing iron hits in the concrete, in particular in designs with an acute wedge angle suitable for high drilling capacities.
- a drill bit provided with flushing bores has two radially offset secondary cutting plates arranged parallel to one another relative to the secondary cutting edge with respect to the secondary cutting edge.
- auxiliary cutting plates are spaced radially different from the main cutting plate.
- a rock drill for hand tools with compact solid hard head on a diametrically extending main cutting edge and arranged exclusively in the radially outer region, with respect to the direction of rotation trailing angled, minor cutting edges whose secondary cutting edge extends radially. Due to the faster wear of the axially projecting main cutting edge reduces the axial board, which reduces the drilling performance and the life.
- the object of the invention is to reduce the risk of breakage of solid carbide head at Arm michsseisentreffern. Another aspect is an increase in the lifetime.
- EP 0 965 405, DE 4 012 772 and EP 1 045 112, on which the preamble of claim 1 is based, disclose secondary cutting edges that run in a radially arcuate manner.
- the solid carbide head of a rock drill for hand tools has a main cutting edge and at least one secondary cutting edge arranged radially exclusively in the outer region, with an arcuate secondary cutting edge.
- the arcuate secondary cutting edge of the sheath circumferentially performed axially rounded, which is lifted axially at a Arm michsseisen Economics the rock drill at this minor cutting edge and the two-sided cutting surfaces.
- the solid carbide head on two minor cutting edges, which are further advantageously arranged symmetrically to the main cutting edge, whereby the vibration noise can be reduced.
- the main cutting edge on two diametrically offset cutting edges which converge as a tip in a roof edge, resulting in a stable Anbohr .
- the secondary cutting edges are advantageously set back axially behind the envelope of the main cutting edges, as a result of which the drilling power increases due to a higher force on the main cutting edge.
- the secondary cutting edges form a sharp wedge angle between 50 ° and 80 ° in the radial plane, as a result of which the secondary cutting edges can penetrate aggressively into hard ground and increase the drilling capacity.
- the secondary cutting edges with respect to the length of their arcuate secondary cutting edge (4a, 4b) are formed such that they are worn axially in the same mass as the main cutting, which over a long service life, a high drilling performance is achieved.
- the solid solid head 1, shown in plan view, of a rock drill for handheld power tools not shown further comprises a main cutting edge 2 and two diametrically offset, symmetrically to the main cutting edge 2, radially outermost in the outer region, arranged minor cutting edges 3a, 3b, each with an arcuate, circumferential axially rounded secondary cutting edge 4a, 4b.
- the main cutting edge 2 has two cutting edges 5a, 5b, which converge as a tip of the rock drill in a roof edge 6.
- the secondary cutting edges 3a, 3b each have an arcuate arc length of approximately ⁇ / 4 rad.
Landscapes
- 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)
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 refers to a rock drill, at least partially rotating and hammering driven by a hand tool device, for the abrasive removal of rock and rock-like material, such as 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 at one end of the shaft a spigot and at the other end a tool head with cutting edges of hard material. The tool head has to cutting inserts or cutting bits made of hard material or is designed as a compact Vollhartstoffkopf. A disadvantage is the increased stress on the cutting edge in the case of reinforcing iron hits in the concrete, in particular in designs with an acute wedge angle suitable for high drilling capacities.
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 drill bit provided with flushing bores has two radially offset secondary cutting plates arranged parallel to one another relative to the secondary cutting edge with respect to the secondary cutting edge.
Nach der EP607958A1 sind bei einem Gesteinsbohrer für Handwerkzeuggeräte zwei, bezüglich der Nebenschneidkante parallel orientierte, Nebenschneidplatten unterschiedlich radial zur Hauptschneidplatte beabstandet.According to EP607958A1 in a rock drill for hand tools two, with respect to the secondary cutting edge parallel oriented, auxiliary cutting plates are spaced radially different from the main cutting plate.
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 on a diametrically extending main cutting edge and arranged exclusively in the radially outer region, with respect to the direction of rotation trailing angled, minor cutting edges whose secondary cutting edge extends radially. Due to the faster wear of the axially projecting main cutting edge reduces the axial board, which reduces the drilling performance and the 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 of solid carbide head at Armierungsseisentreffern. Another aspect is an increase in the lifetime.
Die EP 0 965 405, DE 4 012 772 und die EP1 045 112, auf der des Oberbegiff von Anspruch 1 basiert, offenbaren jeweils Nebenschneidkanten, die radial bogenförmig verlaufen.EP 0 965 405, DE 4 012 772 and
Die Aufgabe wird im wesentlichen durch die Merkmale der unabhängigen Ansprüche gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.The object is essentially achieved by the features of the independent claims. Advantageous developments emerge 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.Essentially, the solid carbide head of a rock drill for hand tools has a main cutting edge and at least one secondary cutting edge arranged radially exclusively in the outer region, 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 arcuate secondary cutting edge of the minor cutting edge, this is elongated in the tangential direction mainly stressed at reinforcing iron hits and thus has a high resistance and durability at Armierungsseisreffern.
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.Advantageously, the arcuate secondary cutting edge of the sheath circumferentially performed axially rounded, which is lifted axially at a Armierungsseisentreff the rock drill at this minor cutting edge and the two-sided cutting surfaces.
Vorteilhaft weist der Vollhartstoffkopf zwei Nebenschneiden auf, die weiter vorteilhaft symmetrisch zur Hauptschneide angeordnet sind, wodurch die Vibrationsgeräusche reduziert werden.Advantageously, the solid carbide head on two minor cutting edges, which are further advantageously arranged symmetrically to the main cutting edge, whereby the vibration noise can be reduced.
Vorteilhaft weist die Hauptschneide zwei diametral versetzte Schneidkanten auf, welche als Spitze in einer Dachkante zusammenlaufen, wodurch sich ein stabiles Anbohrverhalten ergibt.Advantageously, the main cutting edge on two diametrically offset cutting edges, which converge as a tip in a roof edge, resulting in a stable Anbohrverhalten.
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 advantageously set back axially behind the envelope of the main cutting edges, as a result of which the drilling power increases due to a higher force on the main cutting edge.
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.Advantageously, the secondary cutting edges form a sharp wedge angle between 50 ° and 80 ° in the radial plane, as a result of which the secondary cutting edges can penetrate aggressively into hard ground 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.Advantageously, the secondary cutting edges with respect to the length of their arcuate secondary cutting edge (4a, 4b) are formed such that they are worn axially in the same mass as the main cutting, which over a long service life, a high 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
- Fig. 1 as a plan view of the solid carbide head
- Fig. 2 as a side view of a portion of the solid carbide 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
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.2, the part shown in side view of
Claims (6)
- Rock drill bit for hand tools, with a solid-carbide head (1) with a major edge (2) and at least one minor edge (3a, 3b) arranged entirely in the radially outer region, characterized in that the minor edge (3a, 3b) has a tangentially elongate, curved cutting edge (4a, 4b).
- Rock drill bit according to Claim 1, characterized in that the curved cutting edge (4a, 4b) of the minor edge (3a, 3b) is extensively axially rounded.
- Rock drill bit according to Claim 1 or Claim 2, characterized in that the major edge (2) has two diametrically offset cutting edges (5a, 5b) that optionally converge to a ridge (6) forming the tip.
- Rock drill bit according to any one of the preceding claims, characterized in that the minor edge (3a, 3b) is axially set back behind the envelope curve (7) of the major edge (2).
- Rock drill bit according to any one of the preceding claims, characterized in that the minor edge (3a, 3b) makes an acute wedge angle (α) of between 50° and 80° in the radial plane.
- Rock drill bit according to any one of the preceding claims, characterized in that the minor edge (3a, 3e) can be set, in terms of the length of its curved cutting edge (4a, 4b), for axial wear commensurate with that of the major edge (2).
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 EP1225300A2 (en) | 2002-07-24 |
| EP1225300A3 EP1225300A3 (en) | 2003-11-19 |
| EP1225300B1 true 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) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002311241B2 (en) * | 2002-06-06 | 2006-01-05 | Kabushiki Kaisha Miyanaga | Drill bit |
| US6883624B2 (en) * | 2003-01-31 | 2005-04-26 | Smith International, Inc. | Multi-lobed cutter element for drill bit |
| WO2005049295A1 (en) * | 2003-11-17 | 2005-06-02 | 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 |
| DE102006020538A1 (en) * | 2006-05-03 | 2007-11-15 | Irwin Industrial Tools Gmbh | Drilling head for drilling tool and drilling tool |
| DE102006000221A1 (en) * | 2006-05-10 | 2007-11-15 | Hilti Ag | Hard material drilling head |
| US7743855B2 (en) * | 2006-09-05 | 2010-06-29 | Smith International, Inc. | Drill bit with cutter element having multifaceted, slanted top cutting surface |
| ES2315979T3 (en) | 2006-09-26 | 2009-04-01 | BARO GMBH & CO. KG | LIGHTING INSTALLATION. |
| DE102007000534A1 (en) * | 2007-10-19 | 2009-04-23 | Hilti Aktiengesellschaft | percussion |
| DE202008014317U1 (en) | 2008-10-28 | 2009-01-29 | BÄRO GmbH & Co. KG | lamp |
| 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 |
| CN108474239A (en) | 2016-01-13 | 2018-08-31 | 斯伦贝谢技术有限公司 | Angled chisel insertion piece |
| EP4375476A1 (en) * | 2022-11-22 | 2024-05-29 | Hilti Aktiengesellschaft | Rock drill with five cutters |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1812229A1 (en) * | 1968-12-02 | 1971-01-14 | Hilti Ag | Drill or drill holder for hammer drills |
| US3647310A (en) * | 1970-04-03 | 1972-03-07 | Mansfield K Morse | Universal hole saw arbor |
| DE2129913A1 (en) * | 1971-06-16 | 1972-12-21 | Hilti Ag | Rock drill |
| DE2414354A1 (en) * | 1974-03-26 | 1975-10-16 | Heller Geb | ROCK DRILLS |
| DE2807156C2 (en) * | 1978-02-20 | 1986-11-20 | Gebrüder Heller Verwaltungsgesellschaft mbH, 2807 Achim | Rock drilling tool |
| DE3426977A1 (en) * | 1984-07-21 | 1986-01-30 | Hawera Probst Gmbh + Co, 7980 Ravensburg | ROCK DRILL |
| JP2534676Y2 (en) | 1989-04-24 | 1997-05-07 | 仁 下城 | Coverless passenger car |
| DE4012772A1 (en) * | 1990-04-21 | 1991-10-24 | Westa Werkzeugbau | Hammer drill bit - has cruciform cutters with notches in two opposite ones |
| US5273380A (en) | 1992-07-31 | 1993-12-28 | Musacchia James E | Drill bit point |
| DE4339245A1 (en) * | 1993-11-18 | 1995-05-24 | Hilti Ag | Twist drill |
| US5466099A (en) * | 1993-12-13 | 1995-11-14 | Tdw Delaware, Inc. | Cutter shell for forming holes of improved cylindricality |
| DE4436917A1 (en) * | 1994-10-15 | 1996-04-18 | Hilti Ag | Drilling unit with hollow core bit and centering mandrel |
| DE19545647A1 (en) * | 1995-12-07 | 1997-06-12 | Hilti Ag | Rotary impact twist drill |
| DE19650487A1 (en) * | 1996-12-05 | 1998-06-10 | Hilti Ag | Drilling tool |
| DE19711261A1 (en) * | 1997-03-18 | 1998-09-24 | Hilti Ag | Combi drilling tool |
| DE19724373A1 (en) * | 1997-06-10 | 1998-12-17 | Hilti Ag | Rock drill |
| DE19740277B4 (en) * | 1997-09-13 | 2012-05-24 | Robert Bosch Gmbh | drilling |
| DE19748987B4 (en) * | 1997-11-06 | 2007-11-22 | Robert Bosch Gmbh | Drilling tool, in particular for rotary impact drilling of preferably rock |
| DE19827536A1 (en) * | 1998-06-20 | 1999-12-23 | Hilti Ag | Drilling tool |
| DE19916975A1 (en) | 1999-04-15 | 2000-10-19 | Hilti Ag | Rock drill |
| DE10006936A1 (en) * | 2000-02-16 | 2001-08-23 | Hilti Ag | Rock drilling tool |
| DE10006932A1 (en) * | 2000-02-16 | 2001-08-23 | Hilti Ag | Rock drilling tool |
-
2001
- 2001-01-17 DE DE10117262A patent/DE10117262A1/en not_active Withdrawn
-
2002
- 2002-01-08 EP EP02405004A patent/EP1225300B1/en not_active Expired - Lifetime
- 2002-01-08 DE DE50206710T patent/DE50206710D1/en not_active Expired - Lifetime
- 2002-01-16 US US10/050,223 patent/US6843334B2/en not_active Expired - Lifetime
- 2002-01-16 JP JP2002006989A patent/JP3921089B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1225300A2 (en) | 2002-07-24 |
| EP1225300A3 (en) | 2003-11-19 |
| US6843334B2 (en) | 2005-01-18 |
| JP2002273723A (en) | 2002-09-25 |
| JP3921089B2 (en) | 2007-05-30 |
| DE50206710D1 (en) | 2006-06-14 |
| DE10117262A1 (en) | 2002-07-18 |
| US20020108789A1 (en) | 2002-08-15 |
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