EP0669448A1 - Plaque en métal dur et trépau de roche muni d'une telle plaque - Google Patents

Plaque en métal dur et trépau de roche muni d'une telle plaque Download PDF

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Publication number
EP0669448A1
EP0669448A1 EP95100972A EP95100972A EP0669448A1 EP 0669448 A1 EP0669448 A1 EP 0669448A1 EP 95100972 A EP95100972 A EP 95100972A EP 95100972 A EP95100972 A EP 95100972A EP 0669448 A1 EP0669448 A1 EP 0669448A1
Authority
EP
European Patent Office
Prior art keywords
hard metal
section
cross
head
foot part
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.)
Withdrawn
Application number
EP95100972A
Other languages
German (de)
English (en)
Inventor
Rudolf Jenny
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.)
Plica Werkzeugfabrik AG
Original Assignee
Plica Werkzeugfabrik 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 Plica Werkzeugfabrik AG filed Critical Plica Werkzeugfabrik AG
Publication of EP0669448A1 publication Critical patent/EP0669448A1/fr
Withdrawn legal-status Critical Current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
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • 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 hard metal plates and rock drills equipped with them.
  • rock drills as are known, for example, from DE-OS 34 26 977 or DE-OS 30 25 890, hard metal plates with a head part carrying at least one cutting edge and with a foot part adapted to the geometry of a receiving groove in the drilling tool are in one or several cut or milled grooves of a drill head or a drill bit are inserted and fastened therein by soldering.
  • the grooves have generally been designed as ordinary rectangular grooves of constant cross-section.
  • DE-OS 34 26 977 proposes to make the recess groove deeper than the axial soldering depth of the hard metal plate. In this way, the foot of the hard metal plate does not sit on the groove base; rather, a cavity remains between the underside of the foot part of the hard metal plate and the groove base after the hard metal plate is soldered, into which excess solder can flow if necessary.
  • the invention has for its object to provide a hard metal plate and a rock drill equipped with it, which are designed so that there is a much more stable and durable connection between the hard metal plate and the receiving groove in the drilling tool, which can be easily soldered and even with crack formation within the Solder layer reliably prevents the hard metal plate from falling out of the receiving groove.
  • the rock drill according to the invention with a shank, a drill head and at least one hard metal cutting plate, which is inserted into at least one receiving groove of the drilling head and fastened therein, preferably by soldering, is characterized in that the receiving groove is undercut and that the drilling head with at least one hard metal cutting plate according to the invention is equipped, the part inserted into the receiving groove has a cross section which is adapted to the geometry of the undercut receiving groove, preferably as precisely as possible.
  • undercut of the receiving groove and the cross-section of the hard metal plate used which is adapted to the geometry of the undercut and which, depending on the selected type of undercut, is either continuous, e.g. can be conical, expanded or discontinuous, e.g. Step-like or sawtooth-like, form-fitting connections are created that can withstand far greater mechanical forces undamaged and last much longer than was the case with conventionally designed carbide inserts and rock drills.
  • the thickness of the solder layer can be reduced to an ideal minimum, which counteracts crack formation during soldering and cooling due to the different coefficients of thermal expansion.
  • the cross section of the base part of the cutting inserts can be widened in whole or in part conically, in the shape of a dovetail or in part of a circle, and all conceivable combinations of these geometries are also possible.
  • the cross-section of the foot part seen from the head part in the direction of the foot part, can initially be flared and then run out in a part-circle or, after the flared part, run out at an acute angle, an obtuse angle or at right angles.
  • a section of constant cross section can be present between the head part and the foot part of the hard metal plate.
  • the rock drill equipped with the hard metal plates according to the invention can be an ordinary drill head with only one cutting plate or but have a drill bit with two, three or more carbide cutting plates, which are either arranged in a star shape or intersecting.
  • the drill can have a hard metal cutting plate designed as a centering tip, which is also fastened in an undercut receiving groove, preferably by soldering.
  • the hard metal inserts can be additionally secured by caulking.
  • the head part 3 of the hard metal plate 1 has a cutting edge 2.
  • the head part viewed in the direction of the foot part 4, is followed by a section 8 of constant cross section.
  • the foot part 4 is partially flared and then runs out at an acute angle.
  • the foot part 4 adjoins the head part 3 of the hard metal plate 1 without a section of constant cross section being inserted between these two parts.
  • the cross section of the foot part 4 is continuously tapered from top to bottom.
  • a section 8 of constant cross section is followed by a dovetail-shaped foot part 4.
  • the section 8 of constant cross-section is followed by a foot part 4 with an arrow-shaped cross-section, which ends at an acute angle after a discontinuous expansion.
  • the continuously conically widened cross section is followed by an area in the foot part 4 that tapers out in the form of a circle.
  • the continuously expanded foot part 4 ends with a parabolic curve.
  • a section 8 of constant cross-section is followed by a base part 4 with a part-circular (three-quarter circle) cross-section.
  • the end faces of this hard metal plate are preferably chamfered in the area of the head and foot parts 3, 4 (FIG. 1 h).
  • the rock drill according to the invention (FIGS. 2, 3) carries on its shaft 10 a drill bit 11 with three hard metal cutting plates 1 arranged in a star shape, each with a cutting edge 2 and with a hard metal cutting plate 5 in the form of a centering tip, which likewise has three cutting edges 5 '.
  • three receiving grooves 6 are milled in the cross-section, which are partially circular in cross section, each of which extends up to the lateral surface of the core bit 11.
  • three carbide inserts of the embodiment shown in FIG. 1g and a centering tip 5 corresponding cross-section are inserted and fixed by caulking 7 to facilitate assembly or soldering in the area of the opening of the groove 6 to the lateral surface of the drill bit 11.
  • the caulking 7 also serves to additionally secure the hard metal plates 1 against radial falling out in the event that the soldered connection should be defective, tear or break.
  • the procedure is such that the undercut grooves 6 are first milled out, then the carbide cutting plates corresponding to the geometry of the undercut are selected and laterally, with the lateral surface pushed into the grooves, slightly caulked to the lateral surface and finally be soldered.
  • each cutting insert Due to the special geometries of the hard metal plate and the receiving groove, the solder connection to the centering tip can be improved in particular, and the centering tip can be fastened more precisely and with greater mechanical strength than previously in the drill head, which improves the overall centering during drilling. Due to the thin solder joint between cutting insert and receiving groove, which is uniformly formed on all sides, each cutting insert is arranged in a quasi "floating" manner, which has a favorable effect on uniform force distribution during drilling. As a result of their positive connection to the drill head, the cutting plates cannot be torn out or thrown out during drilling even if the solder connection should break. The resulting longer service life of the rock drill according to the invention is of very considerable economic importance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)
EP95100972A 1994-02-28 1995-01-25 Plaque en métal dur et trépau de roche muni d'une telle plaque Withdrawn EP0669448A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944406513 DE4406513A1 (de) 1994-02-28 1994-02-28 Hartmetallplatte und damit bestückter Gesteinsbohrer
DE4406513 1994-02-28

Publications (1)

Publication Number Publication Date
EP0669448A1 true EP0669448A1 (fr) 1995-08-30

Family

ID=6511419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95100972A Withdrawn EP0669448A1 (fr) 1994-02-28 1995-01-25 Plaque en métal dur et trépau de roche muni d'une telle plaque

Country Status (2)

Country Link
EP (1) EP0669448A1 (fr)
DE (1) DE4406513A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0947662A1 (fr) * 1998-04-02 1999-10-06 Plica Werkzeugfabrik Ag Plaque en métal dur et trépan de roche muni d'une telle plaque
EP1083295A1 (fr) 1999-09-09 2001-03-14 HILTI Aktiengesellschaft Outil de forage
EP1083293A1 (fr) 1999-09-09 2001-03-14 HILTI Aktiengesellschaft Outil de forage
EP2848339A1 (fr) 2013-09-13 2015-03-18 Irwin Industrial Tool Company Manche pour outil de forage, outil de forage et procédé de fabrication d'un tel outil
CN116988739A (zh) * 2023-09-26 2023-11-03 西南石油大学 一种高密度纵向布齿pdc钻头

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19601356A1 (de) 1996-01-16 1997-07-17 Plica Werkzeugfabrik Ag Hartmetallplatte und damit bestückter Gesteinsbohrer sowie Verfahren zu dessen Herstellung
ATE367906T1 (de) 2003-11-17 2007-08-15 Bosch Gmbh Robert Bohr- und/oder meisselwerkzeug
DE202007010827U1 (de) * 2007-08-03 2008-12-18 Drebo Werkzeugfabrik Gmbh Bohrer mit einem Hartmetalleinsatz an dem Bohrerkopf

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2030576A (en) * 1932-07-28 1936-02-11 Erickson Charles Replaceable bit rock drill
US2815933A (en) * 1951-10-02 1957-12-10 Dionisotti Joseph Detachable drill bit insert for rock boring tools
US3006424A (en) * 1958-05-23 1961-10-31 Sandvikens Jernverks Ab Rock drill bits and cutting inserts therefor
US4265325A (en) * 1977-06-10 1981-05-05 Canadian General Electric Company Limited Percussion rock bit
DE4012772A1 (de) * 1990-04-21 1991-10-24 Westa Werkzeugbau Bohrer fuer bohrhaemmer, insbesondere zum bohren im gestein, beton o. dgl.
EP0511200A1 (fr) * 1991-05-16 1992-10-28 ROCBO Werkzeug Gesellschaft m.b.H. Couronne de sondage respectivement trépan

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2030576A (en) * 1932-07-28 1936-02-11 Erickson Charles Replaceable bit rock drill
US2815933A (en) * 1951-10-02 1957-12-10 Dionisotti Joseph Detachable drill bit insert for rock boring tools
US3006424A (en) * 1958-05-23 1961-10-31 Sandvikens Jernverks Ab Rock drill bits and cutting inserts therefor
US4265325A (en) * 1977-06-10 1981-05-05 Canadian General Electric Company Limited Percussion rock bit
DE4012772A1 (de) * 1990-04-21 1991-10-24 Westa Werkzeugbau Bohrer fuer bohrhaemmer, insbesondere zum bohren im gestein, beton o. dgl.
EP0511200A1 (fr) * 1991-05-16 1992-10-28 ROCBO Werkzeug Gesellschaft m.b.H. Couronne de sondage respectivement trépan

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0947662A1 (fr) * 1998-04-02 1999-10-06 Plica Werkzeugfabrik Ag Plaque en métal dur et trépan de roche muni d'une telle plaque
EP1083295A1 (fr) 1999-09-09 2001-03-14 HILTI Aktiengesellschaft Outil de forage
EP1083293A1 (fr) 1999-09-09 2001-03-14 HILTI Aktiengesellschaft Outil de forage
EP2848339A1 (fr) 2013-09-13 2015-03-18 Irwin Industrial Tool Company Manche pour outil de forage, outil de forage et procédé de fabrication d'un tel outil
EP3345705A1 (fr) 2013-09-13 2018-07-11 Irwin Industrial Tool Company Manche pour outil de forage, outil de forage et procédé de fabrication d'un outil de forage
CN116988739A (zh) * 2023-09-26 2023-11-03 西南石油大学 一种高密度纵向布齿pdc钻头
CN116988739B (zh) * 2023-09-26 2023-12-26 西南石油大学 一种高密度纵向布齿pdc钻头

Also Published As

Publication number Publication date
DE4406513A1 (de) 1995-08-31

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