EP0790387B1 - Trépan de roche et méthode pour sa fabrication - Google Patents

Trépan de roche et méthode pour sa fabrication Download PDF

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Publication number
EP0790387B1
EP0790387B1 EP97100123A EP97100123A EP0790387B1 EP 0790387 B1 EP0790387 B1 EP 0790387B1 EP 97100123 A EP97100123 A EP 97100123A EP 97100123 A EP97100123 A EP 97100123A EP 0790387 B1 EP0790387 B1 EP 0790387B1
Authority
EP
European Patent Office
Prior art keywords
flanks
drill
rock drill
set forth
head
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
EP97100123A
Other languages
German (de)
English (en)
Other versions
EP0790387A1 (fr
Inventor
Erich Runge
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 EP0790387A1 publication Critical patent/EP0790387A1/fr
Application granted granted Critical
Publication of EP0790387B1 publication Critical patent/EP0790387B1/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
    • E21B10/46—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 and a method for its manufacture.
  • cutting inserts are used Made of hard metal with at least one cutting edge Headboard and with the geometry of a receiving groove in the drilling tool adapted foot part in one or more cut or milled grooves of a drill head or a core bit and in it by soldering attached.
  • the grooves are generally considered ordinary continuous rectangular grooves with a constant cross-section.
  • the hard metal plate is usually caused by caulking in the area of the openings of the receiving grooves Fixed surface of the drill head or the drill bit. This Caulking is usually done before the onset of Tungsten carbide plate executed in the receiving groove. The caulking prevent a radial displacement of the used hard metal plate and on the other hand falling out the plate during subsequent fastening by soldering, Welding or gluing. In addition, the Caulking that between the wall of the receiving groove and the a gap is kept free when using the hard metal plate, into which the molten solder due to capillary forces can penetrate.
  • the receiving groove is an increased pressure on the Carbide plate exercised.
  • the hard metal plate is either already damaged when inserting into the slot or there is an increased risk of breakage when operating the rock drill due to a chiseling effect of the caulking on the hard metal plate, which then breaks the hard metal plate effected at the pressure point.
  • a hard metal plate for Drilling tools with at least one cutting edge Headboard and one of the geometry of a receiving groove in the Drilling tool adapted foot part known, in which the distance between the side surfaces of the foot part in at least one Section of the foot part is larger than in the edge area of the Side surfaces of the foot section.
  • the invention has for its object one with To provide carbide-tipped rock drill, which is such that there is between hard metal plate and receiving groove in the drilling tool a stable and permanent Connection results that is easily soldered or otherwise can be securely centered on the hard metal plate enables and the risk of breakage when operating the Rock drill diminished.
  • the side walls of the receiving groove run apart from the the section with the greater distance between the side surfaces wall areas corresponding to the hard metal plate, preferably essentially parallel to each other so that the previous configuration of a rectangular groove are retained can.
  • the hard metal plate or the receiving groove can also one to the bottom of the hard metal plate or Have tapered cross-section groove bottom without the purpose of the invention is compromised. It is essential that the foot part of the hard metal plate inserted into the receiving groove a section with a larger distance between the two side faces, i.e. a section with a larger clear width, which corresponds to one molded wall area engages the receiving groove, so that ensures a secure centering of the hard metal plate and at the same time a shift in the radial direction is prevented.
  • the part-circular bulges are preferably on formed on both side surfaces of the hard metal plate and lie towards each other.
  • the bulges on the side surfaces The hard metal plate can also be used against each other be staggered. Those are particularly preferred Bulges approximately in the middle of at least one of the side surfaces arranged the hard metal plate.
  • the hard metal plate with Cutting tips are provided, which additional smashing of rock.
  • the cutting tips are preferred arranged in the region of the bulges of the foot part and by extending this area over the Foot part or between the head part and the side surfaces formed edge of the foot part also formed.
  • the rock drill In the rock drill according to the invention, it is in the receiving groove carbide plate used by caulking on the end face of the drill head, preferably in the area the bulge, secured against falling out.
  • the caulking overlaps the between the side surface of the Tungsten carbide plate and its edge formed edge. Thereby any pressure on the hard metal plate is avoided and the risk of breakage due to the chiseling effect of the caulking eliminated.
  • the inventive design of the hard metal plate and the receiving groove enables precise alignment or centering of the hard metal plate prevented reliable displacement in the radial direction and reduces the loads on the hard metal plate.
  • the inventive design achieved that the hard metal plate in the subsequent Soldering, fastening by welding or gluing in centered the receiving groove itself.
  • the invention Rock drill can use an ordinary drill head only one at least over the entire diameter of the drill head extending carbide or insert but a core bit with two, three or more carbide inserts possess that either star-shaped or themselves are arranged crossing.
  • the drill can be known A hard metal cutting plate designed as a centering tip exhibit.
  • Tungsten carbide plate 10 has two main cutting edges on its head part 14 12.
  • the side surfaces adjoin the head part 14 18, 20 of the foot part 16, which are essentially parallel run to each other and meet the headboard 14 form the edge 22.
  • the foot part is the distance between the side surfaces 18, 20 of the foot part 16 larger than in the edge region of the side surfaces the foot part, d. H. here in the area of the end faces 26 the hard metal plate 10.
  • section 24 presents itself as a part-circular Bulge of the side surface 18 represents Embodiment of the hard metal plate 10 shown here is the bulge 24 approximately in the middle of the side surface 18 arranged. It extends in the vertical direction in the substantially over the entire height of the side surface 18 of the Foot part 16. Deviating from the embodiment shown here the bulge 24 can also be at another location the side surface 18 and there may be several Bulges 24 may be provided.
  • Figure 3 shows a plan view of a further embodiment the hard metal plate 10, in which the semi-circular bulge 24 both on the side surface 18 and on the side surface 20 is formed.
  • the embodiment shown here has the bulges 24 facing each other and are approximately in the middle of the side faces 18 and 20 arranged.
  • bulges 24 offset from each other.
  • each side surface 18 or 20 several, preferably opposite bulges 24 may be formed.
  • Figure 4 shows a further embodiment of a Hard metal plate 10.
  • the head part 14 of this hard metal plate carries a cutting edge 12 and is in the range of radially outward after insertion into the drill head End face 28 chamfered.
  • the distance between the apart from section 24 substantially parallel to each other trending side surfaces 18 and 20 is within the middle section 24 larger than in the region of the end face 28 or the back surface 30.
  • the section 24 extends vertically over the entire height of the side surface 18 and / or the side surface 20 and is, in plan view of the Head part 14 of the hard metal plate 10 seen, preferably partially circular.
  • the arrangement of the bulge 24 may be the same as those related to the embodiments described in Figures 1 to 3, in particular can have one or more bulges on one or both side surfaces 18, 20 of the hard metal plate 10 be provided.
  • the hard metal plate 10 can also, in addition to those on the cutting edge 12, one or more Wear cutting tips 13.
  • the cutting tips 13 are in the embodiments shown in FIGS. 5a to 5d in the area of the part-circular bulges 24 arranged and by an extension of these sections over the foot section or between the head section and the side surfaces of the foot portion formed edge 22 also formed.
  • Rock drill carries a drill head on its shaft 32 34 with a receiving groove 36 which is rectangular in cross section
  • the receiving groove extends over the entire diameter of the Drill shaft 32.
  • a hard metal plate 10 according to the embodiment shown in Figure 3 used.
  • the geometry of the foot part of the hard metal plate 10 is adapted to the geometry of the receiving groove.
  • the bulges 24 in the side surfaces the hard metal plate in plan view of the drill head Partially circular recesses in the walls of the receiving groove 36.
  • caulking 38 is formed, which overlap the edge 22 and so the hard metal plate secure against falling out of the receiving groove 36 without however, exert pressure on the hard metal plate 10.
  • the shaft 32 carries a drill bit 34 with three Star-shaped carbide inserts according to the embodiment shown in Figure 4. Furthermore owns the rock drill another carbide insert in the form of a centering pin 40.
  • the drill bit 34 In the drill bit 34 are three rectangular in cross section Milled grooves 36.
  • the walls of the grooves each have the bulges 24 of the side surfaces of the Hard metal plate 10 corresponding, partially circular in plan view Recesses on.
  • In the area of these recesses or the bulges 24 are on the end face 37 of the Drill bit 34 caulking 38 formed which the between the head part 14 and the side surfaces of the foot part of the Grip hard metal plate 10 formed edge 22.
  • the caulking reliably prevent the hard metal plates from falling out 10 during the subsequent connection or fastening by soldering, welding or gluing.
  • the centering pin 40 preferably carries on its underside a square 42, which in a corresponding opening 44, preferably bore in which the drill bit 34 is pressed. In this way, the centering pin 40 is centered and held when later connecting or fastening.
  • the procedure is such that the grooves are milled out first and the geometry of the foot part of the one to be used Tungsten carbide plates can be adapted.
  • the top view partially circular bulges of the side walls of the hard metal plates corresponding recesses in the walls of the Recording grooves can be advantageously by a Drill or mill the groove at the desired one Be made.
  • the corresponding ones Prevent lateral bulges or recesses a radial displacement of the hard metal plates.

Landscapes

  • 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)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Drilling And Boring (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Claims (15)

  1. Foret pour roche comprenant une tige (32), une tête de forage ou une couronne de forage (34) et au moins une plaquette de métal dur (10), qui est posée dans au moins une rainure de réception (36) de la tête de forage (34) et qui y est fixée par brasage, soudage ou collage, caractérisé en ce que la plaquette de métal dur (10) comporte une partie de tête (14), avec au moins une arête tranchante (12), et une partie de base (16) munie de faces latérales (18, 20) attenantes à la partie de tête, la distance entre les faces latérales (18, 20) de la partie de base (16) étant, dans au moins une partie (24) de la partie de base, supérieure à celle dans la zone de bordure des faces latérales (18, 20) de la partie de base, la géométrie de la rainure de réception (36) et celle de la partie de base (16) étant adaptées l'une à l'autre, et la plaquette de métal dur (10), au moins au nombre d'une, étant bloquée dans son assise par un ou plusieurs matages (38) sur la face frontale (37) de la tête de forage (34), les matages (38) s'engageant dans une arête (22) formée à la jonction des faces latérales (18, 20) et de la partie de tête (14).
  2. Foret pour roche selon la revendication 1, caractérisé en ce que les faces latérales (18, 20), à l'exception de la partie (24), dans laquelle la distance entre les faces latérales (18, 20) est plus grande, sont sensiblement parallèles entre elles.
  3. Foret pour roche selon la revendication 1 ou 2, caractérisé en ce que la partie (24), dans laquelle la distance entre les faces latérales (18, 20) est plus grande, est réalisée au milieu de la partie de base (16).
  4. Foret pour roche selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la partie (24), dans laquelle la distance entre les faces latérales (18, 20) est plus grande, est formée par au moins une courbure (24), sensiblement en forme de cercle partiel, selon une vue de dessus de la partie de tête, et réalisée sur une ou sur les deux faces latérales (18, 20) de la partie de base (16).
  5. Foret pour roche selon la revendication 4, caractérisé en ce que les courbures (24) réalisées sur les deux faces latérales (18, 20) sont respectivement opposées l'une à l'autre.
  6. Foret pour roche selon la revendication 4, caractérisé en ce que les courbures (24) réalisées sur les deux faces latérales (18, 20) sont respectivement décalées l'une par rapport à l'autre.
  7. Foret pour roche selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu, en plus des arêtes tranchantes (12), une ou plusieurs pointes tranchantes (13).
  8. Foret pour roche selon la revendication 7, caractérisé en ce que les pointes tranchantes (13) sont formées par un prolongement de la partie (24), dans laquelle la distance entre les faces latérales (18, 20) est plus grande, au-dessus de la partie de base (16).
  9. Foret pour roche selon l'une quelconque des revendications précédentes, caractérisé en ce que les matages (38) sont réalisés dans la partie (24), dans laquelle la distance entre les faces latérales (18, 20) est plus grande.
  10. Foret pour roche selon l'une quelconque des revendications précédentes, caractérisé en ce que la plaquette de métal dur (10) s'étend au moins sur l'ensemble du diamètre de la tête de forage (34).
  11. Foret pour roche selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'au moins trois plaquettes de métal dur (10) sont montées dans la couronne de forage (34).
  12. Foret pour roche selon la revendication 11, caractérisé en ce qu'il est prévu une plaquette de métal dur supplémentaire sous forme d'une pointe de centrage (40).
  13. Foret pour roche selon la revendication 12, caractérisé en ce que la pointe de centrage (40) porte sur sa face inférieure un élément à quatre pans (42), qui est enfoncé dans un orifice ou alésage (44) réalisé dans la couronne de forage (34).
  14. Procédé de fabrication d'un foret pour roche selon l'une quelconque des revendications 1 à 13, qui comprend les étapes suivantes :
    (a) réalisation d'au moins une rainure de réception (36) dans la surface frontale (37) d'une tête de forage ou d'une couronne de forage (34) ;
    (b) pose de la plaquette de métal dur (10) dans la rainure de réception (36), la plaquette de métal dur (10) comportant une partie de tête (14), avec au moins une arête tranchante (12), et une partie de base (16) munie de faces latérales (18, 20) attenantes à la partie de tête, la distance entre les faces latérales (18, 20) de la partie de base (16) étant, dans au moins une partie (24) de la partie de base, supérieure à celle dans la zone de bordure des faces latérales (18, 20), et la géométrie de la partie de base (16) et celle de la rainure de réception (36) étant adaptées l'une à l'autre ;
    (c) matage, sur la face frontale (37) de la tête de forage ou de la couronne de forage (34), d'une partie de la paroi de la rainure de réception (36) surélevée par rapport aux faces frontales (18, 20) de la plaquette de métal dur (10) insérée, afin de former au moins un matage (38), qui s'engage au-dessus d'une arête (22) formée à la jonction des faces latérales (18, 20) et de la partie de tête (14), ce qui permet de bloquer la plaquette de métal dur dans son assise ;
    (d) assemblage de la plaquette de métal dur (10) avec la tête de forage (34) par brasage, soudage ou collage.
  15. Procédé selon la revendication 14, caractérisé en ce que la partie de la paroi de la rainure de réception (36) est matée dans la zone de la partie (24), dans laquelle la distance entre les faces latérales (18, 20) de la partie de base (16) est plus grande.
EP97100123A 1996-01-16 1997-01-07 Trépan de roche et méthode pour sa fabrication Expired - Lifetime EP0790387B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19601356 1996-01-16
DE19601356A DE19601356A1 (de) 1996-01-16 1996-01-16 Hartmetallplatte und damit bestückter Gesteinsbohrer sowie Verfahren zu dessen Herstellung

Publications (2)

Publication Number Publication Date
EP0790387A1 EP0790387A1 (fr) 1997-08-20
EP0790387B1 true EP0790387B1 (fr) 2000-07-12

Family

ID=7782880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97100123A Expired - Lifetime EP0790387B1 (fr) 1996-01-16 1997-01-07 Trépan de roche et méthode pour sa fabrication

Country Status (7)

Country Link
EP (1) EP0790387B1 (fr)
AT (1) ATE194685T1 (fr)
DE (2) DE19601356A1 (fr)
DK (1) DK0790387T3 (fr)
ES (1) ES2151194T3 (fr)
GR (1) GR3034567T3 (fr)
PT (1) PT790387E (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19810193A1 (de) * 1998-03-10 1999-09-16 Hilti Ag Bohrwerkzeug
DE19811887A1 (de) * 1998-03-18 1999-09-23 Plica Werkzeugfabrik Ag Mollis Hammerbohrwerkzeug
DE29806084U1 (de) * 1998-04-02 1998-07-30 Plica Werkzeugfabrik Ag, Mollis Hartmetallplatte und damit bestückter Gesteinsbohrer
DE29816202U1 (de) * 1998-09-09 1999-01-21 Plica Werkzeugfabrik Ag, Mollis Bohrwerkzeug
DE19915304B4 (de) * 1999-03-22 2006-07-27 Robert Bosch Gmbh Bohrwerkzeug
AU2003264922A1 (en) * 2002-09-20 2004-04-08 Boart Longyear Gmbh And Co Kg Rotary boring bit with cutting insert retaining means
DE20314813U1 (de) 2003-09-24 2004-03-04 Berner Gmbh Bohrer mit sternförmigem Hartmetalleinsatz
DE102006000410A1 (de) * 2006-08-21 2008-02-28 Hilti Ag Bohrwerkzeug mit Hartstoffeinsatz
EP4375476A1 (fr) * 2022-11-22 2024-05-29 Hilti Aktiengesellschaft Perforatrice de roches à cinq lames

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1037757A (fr) * 1950-06-22 1953-09-22 Sandvikens Jernverks Ab Lame rapportée pour fleurets de perforatrices à percussion
AT350334B (de) * 1977-01-19 1979-05-25 Sfs Stadler Ag Selbstbohrende schraube
GB2002661A (en) * 1977-08-18 1979-02-28 Spencer & Sons Ltd Improvements in cutting edges of rotary drills and drill bits
US4314616A (en) * 1980-01-28 1982-02-09 Acme-Cleveland Corporation Die-cast masonry drill with leading hard insert
DE3047599A1 (de) * 1980-12-17 1982-07-08 Sortimat Creuz & Co Gmbh, 7057 Winnenden "verfahren und vorrichtung zum anbringen einer hartmetallplatte am kopf eines spiralbohrers"
DE3277111D1 (en) * 1982-06-10 1987-10-08 Seco Tools Ab Cutting tool and cutting insert therefor
US4488840A (en) * 1982-07-08 1984-12-18 Pollington Bernard M Rotary cutting tool
DE8315355U1 (de) * 1983-05-25 1983-12-01 B.B.W. Bayrische Bohrerwerke GmbH & Co KG, 8391 Büchlberg Hartmetallplatte
LU85697A1 (fr) * 1984-12-20 1985-07-24 Cerametal Sarl Procede de fabrication d'une meche de forage et plaquette en metal dur pour sa mise en oeuvre
DE3602427A1 (de) * 1986-01-28 1987-07-30 Stellram Gmbh Werkzeug zur spanenden formung
US4854789A (en) * 1987-10-27 1989-08-08 Nytd Industries Inc. Cutting tool assembly
DE4003375C1 (fr) * 1990-02-05 1991-05-23 Sfs Stadler Holding Ag, Heerbrugg, Ch
DE69112665T2 (de) * 1990-02-20 1996-04-04 Sumitomo Electric Industries Bohrer mit Einwegschneideinsatz.
US5287937A (en) * 1992-06-30 1994-02-22 The Sollami Company Drill bits and the blades therefor
US5458210A (en) * 1993-10-15 1995-10-17 The Sollami Company Drill bits and blades therefor
DE4406513A1 (de) 1994-02-28 1995-08-31 Plica Werkzeugfabrik Ag Hartmetallplatte und damit bestückter Gesteinsbohrer

Also Published As

Publication number Publication date
DE59701985D1 (de) 2000-08-17
DE19601356A1 (de) 1997-07-17
ES2151194T3 (es) 2000-12-16
PT790387E (pt) 2000-12-29
DK0790387T3 (da) 2000-10-30
EP0790387A1 (fr) 1997-08-20
ATE194685T1 (de) 2000-07-15
GR3034567T3 (en) 2001-01-31

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