EP0347602A2 - Trépan de forage de roche - Google Patents

Trépan de forage de roche Download PDF

Info

Publication number
EP0347602A2
EP0347602A2 EP89109303A EP89109303A EP0347602A2 EP 0347602 A2 EP0347602 A2 EP 0347602A2 EP 89109303 A EP89109303 A EP 89109303A EP 89109303 A EP89109303 A EP 89109303A EP 0347602 A2 EP0347602 A2 EP 0347602A2
Authority
EP
European Patent Office
Prior art keywords
cutting
drill head
main
cutting plate
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.)
Granted
Application number
EP89109303A
Other languages
German (de)
English (en)
Other versions
EP0347602B1 (fr
EP0347602A3 (en
Inventor
Wolfgang Dipl.-Ing. Peetz
Bernhard Moser
August Haussmann
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.)
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Robert Bosch Power Tools GmbH
Original Assignee
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Hawera Probst GmbH
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 Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG, Hawera Probst GmbH filed Critical Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Publication of EP0347602A2 publication Critical patent/EP0347602A2/fr
Publication of EP0347602A3 publication Critical patent/EP0347602A3/de
Application granted granted Critical
Publication of EP0347602B1 publication Critical patent/EP0347602B1/fr
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
    • E21B10/44—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
    • E21B10/58—Chisel-type inserts

Definitions

  • the invention relates to a rock drill according to the preamble of claim 1.
  • Rock drills with carbide inserts are used to drill holes in concrete, masonry, stone or the like.
  • the end face of the drill head is provided with at least one hard metal cutting plate that generally extends over the entire diameter of the drill head and exerts a kind of chisel effect on the earthenware to be shredded due to the rotary drive or hammering drill drive.
  • the diameter of the borehole is determined by the outer diameter of the carbide insert.
  • cross cutting elements In order to reduce the surface pressure on the carbide cutting elements and thus the service life of the drill head enlarge, cross cutting elements have become known in which two secondary cutting plates are arranged at right angles to the main cutting plate (DE-A1 29 12 394).
  • secondary cutting elements arranged only on the outer circumference can also be provided (GM 81 04 116).
  • a rock drill has also become known, in which the secondary cutting elements are designed as cutting pins which are arranged asymmetrically with respect to the main cutting plate. At least two and sometimes up to four separate cutting pins are used as additional cutting elements. This is intended to cause less wear on the main insert.
  • the conventional drill head geometries mostly assume a symmetrical arrangement of the main and secondary cutting elements used and the associated drilling dust grooves inserted between the cutting elements.
  • the construction of the drill head can also lead to vibrations and thus to an uneven borehole geometry. This can occur, for example, with a drill head geometry according to DE-PS 757 056.
  • the invention has for its object to improve the drill head geometries of the known drilling tools, in particular a drilling head cross section is created which manages with as few cutting elements as possible with an optimal arrangement of drilling dust grooves and wherein a quiet and uniform concentricity of the drilling tool is achieved.
  • the positive properties of a four- or five-edge drill should be retained, but with a technically advantageous design of the drill head geometry.
  • the invention is based on the knowledge, in particular also underpinned by tests, that a completely symmetrical drill head does not necessarily achieve the best drilling progress.
  • a completely symmetrical drill head does not necessarily achieve the best drilling progress.
  • main cutting edges or secondary cutting edges by over-equipping the drill head with main cutting edges or secondary cutting edges, a reduced surface contact pressure is achieved which does not have the necessary explosive force or chisel force in order to mine the rock in the borehole.
  • the knowledge is gained that, in addition to a continuous main cutting insert, which takes over the main management work and the essential part of the chiseling effect, only another one per se Secondary insert is necessary, but is located in an asymmetrical arrangement with respect to the main insert. This effectively prevents the drill head from vibrating or vibrations occurring, which leads to better roundness of the borehole.
  • the invention initially provides for the formation of a so-called three-cutting head, which provides a completely new scope for designing the remaining geometry of the drilling head.
  • This geometry can in particular lead to a kind of triangular or V-shaped drill head, which creates enlarged spaces for the drilling dust to be removed.
  • the arrangement of the secondary cutting element is always asymmetrical with respect to the cutting edges of the main cutting insert.
  • the secondary cutting insert like the main cutting insert, is designed as a roof-shaped cutting insert.
  • inexpensive hard metal cutting inserts can be used as secondary cutting inserts, the secondary cutting insert having a cutting tip similar to a cutting pin and therefore having an additional chisel effect similar to the design according to DE 35 44 433.
  • the secondary cutting edge has an additional, external cutting edge which, in a further development of the invention, works in the same frontal envelope as the two cutting edges of the main cutting plate.
  • the roof-shaped secondary cutting insert therefore has the effect of cutting pins with the additional effect of the outer cutting edges. This contributes to increased drilling progress.
  • the asymmetrical arrangement of the secondary cutting insert is preferably such that it forms an acute angle with respect to a trailing cutting surface of the main cutting insert and with respect to the leading second Cutting surface of the main insert takes an obtuse angle. This arrangement reduces the wear of the associated trailing cutting surface of the main cutting plate, which improves the guiding properties and thus the drilling progress and the service life.
  • the grooves for the main cutting plate and the secondary cutting plate are designed as continuous grooves extending over the entire diameter of the drill head, the grooves meeting at the center of the borehole circumference.
  • the grooves can be produced particularly easily in the drill head by continuous milling.
  • the roof-shaped secondary cutting insert is advantageously designed with the same radial extension or slightly smaller than the diameter of the main cutting insert. In this way, the secondary cutting insert for guiding and rock removal can effectively support the main cutting insert.
  • the drill head has a V-shaped or triangular cross-section.
  • the resulting flat or curved side flanks form large drilling dust grooves, which improve drilling progress.
  • semicircular arc sections for guiding support are formed on the circumference of the drill head. Any necessary enlargement of the cross section for removing the drilling dust is achieved by forming a triangle or a Y-shaped design of the drill head.
  • a second secondary cutting edge can also be provided in an arrangement symmetrical to the first secondary cutting edge, with the main cutting insert as the plane of symmetry.
  • the rock drill 1 shown in a side view in FIG. 1 and in a top view in FIG. 2 consists of a drill head 2 with an adjoining two-start feed screw 3 and a clamping shaft 4.
  • the drill head 2 has on its end face a main cutting plate 5 which extends over the entire diameter d 1 of the drill head 2 and has a diameter D which forms the borehole diameter D.
  • the main cutting plate 5 is inclined roof-shaped with an acute angle ⁇ ⁇ 130 ° and has individual cutting edges 6, 7 which are arranged 180 ° to one another.
  • the main insert 5 has a plate thickness of s 1 and a height of h 1. It is soldered into a continuous groove 8 in the drill head 2.
  • the drill head has a further secondary cutting plate 9, which is likewise designed as a hard metal cutting plate inclined in a roof shape and having two individual cutting edges 10, 11.
  • the secondary cutting insert 9 therefore has the same basic construction as the main cutting insert 5, except that it is made smaller.
  • the secondary cutting plate 9 is arranged asymmetrically in the drill head 2, i. H. with respect to the trailing single cutting edge 6 of the main cutting insert 5, the secondary cutting insert takes an acute angle ⁇ 1, with respect to the leading second individual cutting edge 7 of the main cutting insert 5 an obtuse angle ⁇ 2.
  • the direction of rotation of the drilling tool is indicated by arrow 12.
  • the secondary cutting plate 9 extends radially as far as possible up to the diameter range D of the main cutting plate 5. As shown in FIG. 2, however, it extends at least up to the drill head diameter d 1.
  • the secondary cutting insert 9 is inserted into a groove 13 extending over the entire drill head diameter, which also extends beyond the center 14 of the drill head 2 and forms an empty groove 13 'there. This empty groove can also be used to remove drilling dust.
  • the grooves 8, 13 extending over the entire diameter have the advantage of simple manufacture during the milling process.
  • the grooves 8, 13 intersect at the center 14 of the drill head 2.
  • the secondary cutting plate 9 Due to its roof-shaped design, the secondary cutting plate 9 has a cutting tip 15 which, like the cutting tip 16 of the main cutting plate 5, has a chiseling function in stone processing.
  • the secondary cutting plate 9 has the radially outer individual cutting edge 10 as an effective cutting area.
  • the individual cutting edge 10 lies in the same frontal circular cone 17 as the cutting edges 6, 7 of the main cutting plate 5.
  • the outer geometry of the drilling head 2 can be designed to be very different from conventional drilling tools. This applies in particular to the formation of large drilling dust grooves 18, 19 in the area of the drill head.
  • FIG. 1 or FIG. 2 has an essentially V-shaped cross section, the imaginary V-shaped tip 20 of which lies outside the diameter D circumference.
  • the drill head is accordingly formed by the two flat side flanks 21, 22 which delimit the drill dust groove in the drill head area.
  • the included angle between the side flanks 21, 22 is ⁇ 3 ⁇ 60 °. This leads to a flank length that extends over the center line 23 arranged vertically in FIG. 2.
  • the arc area 24 enclosed by the two side flanks 21, 22 lies on the circumference of the drill head with the diameter D 1.
  • This semicircular arc region encompasses a rotation range of almost 180 ° and serves to support the drill head in the borehole.
  • the point of intersection of the V-shaped tip 20 is arranged by the amount a outside the outer main insert diameter D in order to obtain sufficient support material for the main insert in this area next to the main insert 5.
  • This still rounded area of the drill head is indicated by reference numeral 25 in the figure.
  • the inventive design of the drill head with a pronounced V-shape gives the drill head a very slim and narrow appearance, due to the large drilling dust grooves 18, 19.
  • the asymmetrical arrangement of the secondary cutting plate 9 leads to an extremely smooth concentricity with very good drilling progress.
  • FIG. 3 differs in principle from that according to FIGS. 1 and 2 only in that the arcuate region 24 connecting the side flanks 21, 22 is also flattened as an additional side flank 26.
  • an equilateral triangle with the side lines 21, 22, 26 and the corner points 20, 27, 28 is formed in the cross-sectional circle with the drill head diameter d 1.
  • the other corner points 27, 28 are arranged similarly, as the intersection 20 also shown in Fig. 20.
  • This arrangement in addition to the drilling grooves 18, 19, formed by the side flanks 21, 22, an additional drilling groove 29 and 29 'on both sides of Individual cutting edge 6 of the main cutting plate 5 is formed.
  • the arrangement of the secondary cutting insert 9 corresponds to that in FIG. 2. Otherwise, the same parts in FIG. 3 are provided with the same reference numerals as in FIG. 2.
  • FIG. 4 Another embodiment of the invention is shown in FIG. 4.
  • the drill head is Y-shaped in cross section, with only one drill head section 30 remaining between the main cutting plate and the secondary cutting plate 9.
  • the large drill bit groove 31 extending over 180 ° between the individual cutting edges 6, 7 of the main cutting plate 5 and the second drill bit groove 32 extending approximately 120 ° formed between the secondary cutting plate 9 and the single cutting edge 6 of the main cutting plate.
  • this is offset from the individual cutting edge 7 of the main cutting insert 5 by the angle ⁇ 1 as described in FIG. 2.
  • the embodiment according to FIG. 5 represents a variant of the embodiment according to FIG. 4.
  • a further auxiliary cutting insert 9 ' is arranged symmetrically to the main cutting insert symmetry plane 33'.
  • This additional secondary cutting plate 9 ' is constructed identically to the secondary cutting plate 9 already described.
  • the rock drill becomes a four-edge drill, with the two cutting edges 6, 7 of the main cutting plate 5, the radially outer individual cutting edge 10 of the secondary cutting plate 9 and the radially external individual cutting edge 10 'Of the additional sub-insert 9'.
  • the secondary cutting insert 9 ' is leading over the individual cutting edge 6 of the main cutting insert 5, the secondary cutting insert 9 is arranged lagging (direction of rotation 12).
  • the drilling dust grooves 32 and 34 extending over an angle of rotation of approximately 120 ° are formed. 5 accordingly receives an arc region 24 ', as indicated in FIG. 2 by reference numeral 24.
  • flanks 21, 22 can be designed in a V-shaped manner, as shown by flanks 35, 36 delimiting the drilling dust grooves 32, 34. Likewise, these flanks can also be concave.
  • the invention is not restricted to the exemplary embodiment shown and described. Rather, it also encompasses all professional configurations without their own inventive content.

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)
EP89109303A 1988-06-18 1989-05-23 Trépan de forage de roche Expired - Lifetime EP0347602B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3820695A DE3820695C2 (de) 1988-06-18 1988-06-18 Gesteinsbohrer
DE3820695 1988-06-18

Publications (3)

Publication Number Publication Date
EP0347602A2 true EP0347602A2 (fr) 1989-12-27
EP0347602A3 EP0347602A3 (en) 1990-06-06
EP0347602B1 EP0347602B1 (fr) 1993-08-04

Family

ID=6356785

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109303A Expired - Lifetime EP0347602B1 (fr) 1988-06-18 1989-05-23 Trépan de forage de roche

Country Status (3)

Country Link
US (1) US4951761A (fr)
EP (1) EP0347602B1 (fr)
DE (2) DE3820695C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4407119A1 (de) * 1993-12-11 1995-06-14 Hawera Probst Kg Hartmetall Gesteinsbohrer
EP0654580A3 (fr) * 1993-11-18 1995-11-02 Hilti Ag Foret héliocoidal.
WO1996007011A1 (fr) * 1994-08-30 1996-03-07 Reburg Patentverwertungsgesellschaft Mbh Tete de forage comportant un ensemble de corps de coupe a configuration en fleche
WO1996035856A1 (fr) * 1995-05-09 1996-11-14 Gebr. Heller Dinklage Gmbh Outil de forage
EP0778391A3 (fr) * 1995-12-07 1998-07-01 HILTI Aktiengesellschaft Perceuse rotative hélicoidale à percussion
WO2010036498A1 (fr) * 2008-09-23 2010-04-01 Illinois Tool Works Inc. Trépan à roche

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5291960A (en) * 1992-11-30 1994-03-08 Ford Motor Company Hybrid electric vehicle regenerative braking energy recovery system
DE4301708C2 (de) * 1993-01-22 2002-10-31 Drebo Werkzeugfab Gmbh Gesteinsbohrer
DE4303590C5 (de) * 1993-02-08 2007-11-22 Drebo Werkzeugfabrik Gmbh Gesteinsbohrer
DE4338667A1 (de) * 1993-11-12 1995-05-18 Hilti Ag Bohrwerkzeug
TW299385B (en) 1994-12-12 1997-03-01 Black & Decker Inc Cutting tools for drilling concrete, aggregate, masonry or the like materials
US5918105A (en) * 1994-12-12 1999-06-29 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
DE19724373A1 (de) * 1997-06-10 1998-12-17 Hilti Ag Gesteinsbohrer
DE19807394A1 (de) * 1998-02-21 1999-08-26 Hilti Ag Bohr- und/oder Meisselwerkzeug
US6039127A (en) * 1998-03-13 2000-03-21 Loudon Enterprises, Inc. Rock drill
DE19942986A1 (de) * 1999-09-09 2001-03-15 Hilti Ag Bohrwerkzeug
US6374931B1 (en) * 1999-11-03 2002-04-23 Relton Corporation Multiple cutter rotary hammer bit
US6595305B1 (en) * 2000-02-15 2003-07-22 Kennametal Inc. Drill bit, hard member, and bit body
DE10024433A1 (de) * 2000-05-19 2001-11-29 Hawera Probst Gmbh Gesteinsbohrer
DE20016012U1 (de) * 2000-09-15 2000-11-30 Drebo Werkzeugfabrik Gmbh, 88361 Altshausen Gesteinsbohrer
DE10360707A1 (de) 2002-12-19 2004-07-08 Hawera Probst Gmbh Gesteinsbohrer
GB2404889A (en) * 2003-08-12 2005-02-16 Black & Decker Inc A cutting plate for a drill bit
DE102008054869B4 (de) * 2008-12-18 2010-09-02 Hilti Aktiengesellschaft Bohrkopf für Gesteinsbohrer
US9695640B2 (en) 2012-08-03 2017-07-04 Irwin Industrial Tool Company Drill head for a drill and drill
AU363298S (en) * 2015-07-17 2015-08-11 The State Of Queensland Through Its Dept Of Agriculture And Fisheries Drill corer
DE102015220634A1 (de) * 2015-10-22 2017-06-29 Robert Bosch Gmbh Bohrwerkzeug
US10507534B2 (en) 2016-03-17 2019-12-17 O-Tags, Inc. Systems, methods, and apparatus for reliably installing survey tags

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Publication number Priority date Publication date Assignee Title
CA677997A (en) * 1964-01-14 Ingersoll-Rand Company Drill bit
DE757076C (de) * 1936-11-18 1951-05-15 Erhard Dipl-Ing Bertl Gesteinsschlagbohrer mit radialen und exzentrisch gerichteten Hartmetallschneiden
DE912202C (de) * 1941-06-15 1954-05-28 Boehler & Co Ag Geb Gesteinsbohrer oder Bohrkrone mit Hartmetallschneiden
FR889080A (fr) * 1942-01-16 1943-12-30 Flottmann Ag Foret de mine à tranchant en métal dur rapporté
US2507222A (en) * 1946-08-19 1950-05-09 Phipps Orville Multiple edge percussion bit
GB637237A (en) * 1947-01-10 1950-05-17 Rip Bits Ltd Improvements in and relating to rock drills
CH302460A (de) * 1949-09-03 1954-10-31 Boehler & Co Ag Geb Gesteinsbohrer.
DE918383C (de) * 1951-04-03 1954-09-27 Eisen & Stahlind Ag Gesteinsbohrkrone
US3163244A (en) * 1961-05-19 1964-12-29 Ingersoll Rand Co Rock drill bit having non-aligned cutting members
US3294186A (en) * 1964-06-22 1966-12-27 Tartan Ind Inc Rock bits and methods of making the same
DE2129913A1 (de) * 1971-06-16 1972-12-21 Hilti Ag Gesteinsbohrer
DE2211532C2 (de) * 1972-03-10 1982-07-01 Hawera Probst Gmbh + Co, 7980 Ravensburg Bohrer mit wendelförmiger Bohrmehlnut
DE2348874A1 (de) * 1973-09-28 1975-04-10 Heinrich B Schaefers Gesteinsbohrer mit hartmetallbestueckung und auswechselbarem bohrkopf, sowie auswechselbarer spirale
DE2756140A1 (de) * 1977-12-16 1979-06-21 Heinrich B Schaefers Gesteinsbohrer fuer bohrloecher kleineren durchmessers
AT376765B (de) * 1978-05-16 1984-12-27 Guergen Karlheinz Auswechselbare bohrkrone fuer einen bei allen gesteinsarten anwendbaren gesteindrehschlagbohrer und bohrhammer
DE2841679C3 (de) * 1978-09-25 1982-12-09 Karlheinz 2101 Harmstorf Guergen Gesteinsbohrkrone zum Drehschlagbohren
DE2912394A1 (de) * 1979-03-29 1980-10-09 Guergen Karl Heinz Gesteinsbohrwerkzeug fuer gesteinsbohr-, drehschlagbohr- und bohrhammermaschinen
US4262762A (en) * 1979-10-09 1981-04-21 Potratz Robert P Anti-collaring structure for impact bit
DE3025890A1 (de) * 1980-07-09 1982-01-21 Westa Werkzeugbau Gmbh, 8130 Starnberg Bohrer fuer bohrhaemmer, insbes. zum bohren in gestein, beton o.dgl.
DE8104116U1 (de) * 1981-02-14 1982-08-05 Robert Bosch Gmbh, 7000 Stuttgart Gesteinsbohrer
DE3500202A1 (de) * 1985-01-05 1986-07-10 Hawera Probst Gmbh + Co, 7980 Ravensburg Bohrwerkzeuge
DE3544433C2 (de) * 1985-12-16 1995-12-14 Hilti Ag Gesteinsbohrer

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0654580A3 (fr) * 1993-11-18 1995-11-02 Hilti Ag Foret héliocoidal.
DE4407119A1 (de) * 1993-12-11 1995-06-14 Hawera Probst Kg Hartmetall Gesteinsbohrer
US5482124A (en) * 1993-12-11 1996-01-09 Hawera Probst Gmbh + Co. Rock drill
CN1056900C (zh) * 1993-12-11 2000-09-27 豪沃拉普鲁布斯特有限公司及两合公司 岩石钻
WO1996007011A1 (fr) * 1994-08-30 1996-03-07 Reburg Patentverwertungsgesellschaft Mbh Tete de forage comportant un ensemble de corps de coupe a configuration en fleche
WO1996035856A1 (fr) * 1995-05-09 1996-11-14 Gebr. Heller Dinklage Gmbh Outil de forage
US6032750A (en) * 1995-05-09 2000-03-07 Gebrueder Heller Dinklage Gmbh Drilling tool having a drill bit with primary and secondary cutting edges
EP0778391A3 (fr) * 1995-12-07 1998-07-01 HILTI Aktiengesellschaft Perceuse rotative hélicoidale à percussion
WO2010036498A1 (fr) * 2008-09-23 2010-04-01 Illinois Tool Works Inc. Trépan à roche
AU2009296975B2 (en) * 2008-09-23 2014-06-26 Heller Tools Gmbh Rock drill bit
US8960336B2 (en) 2008-09-23 2015-02-24 Heller Tools Gmbh Rock drill bit

Also Published As

Publication number Publication date
DE3820695A1 (de) 1989-12-21
DE58905115D1 (de) 1993-09-09
DE3820695C2 (de) 1996-07-25
EP0347602B1 (fr) 1993-08-04
EP0347602A3 (en) 1990-06-06
US4951761A (en) 1990-08-28

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