EP0169402B1 - Trépan de roche - Google Patents

Trépan de roche Download PDF

Info

Publication number
EP0169402B1
EP0169402B1 EP85107961A EP85107961A EP0169402B1 EP 0169402 B1 EP0169402 B1 EP 0169402B1 EP 85107961 A EP85107961 A EP 85107961A EP 85107961 A EP85107961 A EP 85107961A EP 0169402 B1 EP0169402 B1 EP 0169402B1
Authority
EP
European Patent Office
Prior art keywords
rock drill
wings
cutter body
drill according
plunge
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
Application number
EP85107961A
Other languages
German (de)
English (en)
Other versions
EP0169402A2 (fr
EP0169402A3 (en
Inventor
Wolfgang Dipl.-Ing. Peetz
Bernhard Moser
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.)
Robert Bosch Power Tools GmbH
Original Assignee
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 GmbH filed Critical Hawera Probst GmbH
Publication of EP0169402A2 publication Critical patent/EP0169402A2/fr
Publication of EP0169402A3 publication Critical patent/EP0169402A3/de
Application granted granted Critical
Publication of EP0169402B1 publication Critical patent/EP0169402B1/fr
Expired 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
    • 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
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits

Definitions

  • the invention relates to a rock drill with radial recess grooves for receiving cutting bodies to be soldered in, and in particular to a rock drill for breakthroughs with a drill head body arranged at the end of a drill shaft, the at least two radially projecting vanes provided with cutting bodies, and a centering lug with cutting bodies arranged axially in front of the wings in the direction of drilling having.
  • the cutting bodies made of hard metal are soldered into the cutting body receiving grooves of the steel drill head using the brazing method.
  • the depth of the cutting body receiving groove was dimensioned such that the cutting body sits on the base of the groove during the soldering process in order to obtain a precisely defined position.
  • the invention has for its object to eliminate the aforementioned disadvantages, i.e. to create a tension-free fit of hard metal cutting bodies in rock drills and in this context to simplify the manufacturing process, in particular of rock drills for producing breakthroughs, and thus to make them more cost-effective.
  • the ratio of thermal expansion is approx. 2: 1 for the material pairing of steel and hard metal.
  • the ratio of thermal expansion is approx. 2: 1 for the material pairing of steel and hard metal.
  • room temperature equal lengths of hard metal and steel are available before the soldering process. When heated to the soldering temperature, the steel expands much more than the hard metal. When the connection cools down to the solidification temperature of the solder, the length of the steel is still much greater than that of the hard metal body. Further cooling to room temperature then - similar to a bimetal - causes the compound to bend.
  • this deflection cannot take place with a drilling tool, since in practice the hard metal plate is surrounded on both sides by steel as a result of the slot soldering. As a result, tensile stresses must be present in the steel body that are greatest in the slot base. There are also tensile stresses in the transverse direction in the hard metal plate.
  • the hard metal cutting body can now at least partially follow the steel shrinkage, so that the stresses both in the steel and in the hard metal cutting body are considerably reduced and in particular are not exactly present in the slot base.
  • This area is in any case very vulnerable as a breaking point due to voltage peaks.
  • the invention therefore has the further advantage that, in a rock drill with two blades, all the grooves for receiving cutting bodies are produced with only one operation.
  • the groove is made so deep axially through the centering projection with a side milling cutter that it simultaneously engages in the wings of the drill head body. The result is a continuous radial groove, which cuts through both the centering shoulder in its full axial length and the wings to the intended depth for the cutting body.
  • the continuous groove according to the invention for forming the insert seat in the wing also advantageously enables the cutting bodies to be optimally soldered into the wing. This is achieved by the fact that due to the available space on both sides of the respective cutting element, correct metering and feeding of the solder is made possible.
  • the principle according to the invention can be applied to a one-piece rock drill both with two and with a larger number of blades, provided that these are arranged diametrically to one another. According to the invention, the simplified production possibility of one-piece rock drills and thus the more economical production of such breakthrough tools is decisive.
  • a plurality of cutting bodies can be arranged radially next to one another in a groove in order to increase the cutting performance if necessary. For this it is not necessary that new grooves or slots or bores are made in the wings by means of complex manufacturing processes.
  • a plurality of radial grooves can be arranged at a certain angle to one another in one finger. This can also increase the cutting performance for special applications.
  • the rock drill 10 shown in FIGS. 1 and 2 can be both a normal twist drill and the centering tip or centering shoulder 16 of a rock drill as shown in FIGS. 3 and 4.
  • the largely tension-free seat of the cutting body cutting element 23 made of hard metal in the cutting body receiving groove 17 is decisive the penetration depth t 2 of the hard metal cutting body 23.
  • the free space t 4 between the cutting body and the groove bottom should be at least 0.5 x the slot width or cutting body b. As a result, the lower edge of the cutting body 23 does not rest on the bottom 18 of the groove 17.
  • the width b of the slot or the groove 17 is constant.
  • the loads that occur in practice are in the range of approx. 2 to 4 tons.
  • the rock drill 10 'shown in a side view in FIG. 3 consists of a drill head body 11 which is molded onto the cylindrical shaft 12 of a breakthrough tool.
  • the drill head body 11 consists of two radial sections designated as vanes 13, 14, which are designed in a manner known per se. With respect to the axis plane 15, the wings 13, 14 are designed symmetrically.
  • a continuous cutting body receiving groove 17 ′ is produced, which extends in alignment from the outermost radial point of the wing 13 via the centering projection 16 to the outermost radial point of the wing 14.
  • the lower edge 18 'of the receiving groove 17' which can be seen in plan view in FIG. 4 is indicated by dashed lines.
  • the cutting bodies 19, 20 in the wing 13 or 21, 22 in the wing 14 and the cutting body 23 of the centering projection 16, which is offset in the axial direction, are then soldered into this continuous cutting body receiving groove 17 ′, which can be produced in one operation, in the known brazing process.
  • this continuous cutting body receiving groove 17 ′ which can be produced in one operation, in the known brazing process.
  • the cutting bodies 19 to 22 are easily accessible from the side, so that the dosage of the solder and the soldering process can be optimally designed.
  • the cutting body 23 of the centering projection 16 is not limited at the bottom by the continuous groove 17 ', so that lower voltage peaks occur during soldering than with firm clamping.
  • the cutting body receiving groove 17 ' is offset by an angle ⁇ ⁇ 18 ° with respect to the plane of symmetry 24 by the wings 13, 14.
  • this ensures early engagement of the cutting bodies 19 to 22 in the material to be drilled and increased support of the cutting bodies by the drill head body 11.
  • This measure also makes it possible to provide a further cutting body receiving groove 17 "offset at an angle in the wings 13, 14, in order to achieve an increased cutting performance with only two wings.
  • more than two wings that is to say, for example, an arrangement according to FIG literature mentioned at the beginning can be used.
  • the radius R shown in Fig. 2 is approximately 32 mm.
  • the groove depth t 2 in the wings 13, 14 is approximately 4.5 mm, the groove width b is also approximately 4.5 mm.

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)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Claims (9)

1. Fleuret à rocher comprenant au moins une gorge d'enfichage radiale pour recovoir au moins un corps de coupe à y braser, caractérisé en ce que la profondeur (t, t,) de la gorge d'enfichage (17,17', 17") pour le corps de coupe (23) est réalisée plus importante que la profondeur de brasage axiale (t2) du corps de coupe (23), le corps de coupe (23) étant également introduit selon le procédé de brasage, sans appui inférieur.
2. Fleuret à rocher selon la revendication 1, caractérisé en ce que la différence de la profondeur de fente (t) par rapport à la profondeur de brasage axiale (t2) du corps de coupe (23) est au moins de 0,5 x la largeur de fente (b).
3. Fleuret à rocher selon la revendication 1 ou 2, celui-ci étant pourvu, pour produire des percements, d'un corps de tête de fleuret présentant au moins deux ailettes radialement en saillie, pourvues de corps de coupe, ainsi qu'un appendice de centrage à corps de coupe et disposé axialement devant les ailettes, dans le sens de perçage, caractérisé en ce que la profondeur (ti) de la gorge d'enfichage (17', 17") s'étend dans la zone des ailettes radiales (13, 14) en passant dans l'appendice axial de centrage (16).
4. Fleuret à rocher selon la revendication 3, caractérisé en ce que le siège de corps de coupe destiné aux corps de coupe (19 à 22) des ailettes (13, 14) disposées symétriquement et destiné au corps de coupe (23) de l'appendice de centrage (16) est formé par une gorge d'enfichage (17', 17") radiale, traversante, fabriquable en une opération.
5. Fleuret à rocher selon la revendication 3 ou 4, caractérisé en ce que chaque ailette (13, 14) présente au moins deux corps de coupe (19, 20) respectivement 21, 22) disposés l'un à côté de l'autre radialement.
6. Fleuret à rocher selon une ou plusieurs des revendications 3 à 5, caractérisé en ce que la gorge de réception de corps de coupe (17') est disposée décalée d'un angle α ≈ 18° par rapport à l'axe longitudinal central (24) passant par les ailettes (13,14).
7. Fleuret à rocher selon une ou plusieurs des revendications 3 à 6, caractérisé en ce que deux ailettes opposées (13, 14) et l'appendice de centrage (16) placé entre elles présentent des gorges d'enfichage (17', 17") traversantes décalées d'un angle β.
8. Fleuret à rocher selon une ou plusieurs des revendications 3 à 7, caractérisé en ce que quatre ailettes disposées symétriquement, avec des gorges d'enfichage continues sur l'appendice de centrage, sont prévues pour recevoir des corps de coupe.
9. Fleuret à rocher selon une ou plusieurs des revendications 1 à 8, caractérisé en ce que le corps de coupe (23) de l'appendice de centrage est réalisé en couronne de perçage en croix.
EP85107961A 1984-07-21 1985-06-27 Trépan de roche Expired EP0169402B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3426977 1984-07-21
DE19843426977 DE3426977A1 (de) 1984-07-21 1984-07-21 Gesteinsbohrer

Publications (3)

Publication Number Publication Date
EP0169402A2 EP0169402A2 (fr) 1986-01-29
EP0169402A3 EP0169402A3 (en) 1986-12-10
EP0169402B1 true EP0169402B1 (fr) 1989-05-03

Family

ID=6241251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107961A Expired EP0169402B1 (fr) 1984-07-21 1985-06-27 Trépan de roche

Country Status (3)

Country Link
US (1) US4729441A (fr)
EP (1) EP0169402B1 (fr)
DE (2) DE3426977A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10306645B3 (de) * 2003-02-18 2004-04-08 Hilti Ag Schlagdrehbohrer mit Hartstoffschneiden

Families Citing this family (33)

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DE3742661A1 (de) * 1987-12-16 1989-07-13 Hawera Probst Kg Hartmetall Gesteinsbohrer
DE3820697A1 (de) * 1988-06-18 1989-12-21 Hawera Probst Kg Hartmetall Bohrwerkzeug
DE4114271A1 (de) * 1991-05-02 1992-11-05 Hilti Ag Bohr- und meisselwerkzeug mit grundkoerper und schneidkoerper
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
GB2303810A (en) * 1995-07-29 1997-03-05 Black & Decker Inc Masonry drill bit
GB2303809A (en) * 1995-07-29 1997-03-05 Black & Decker Inc Roll-forged drill bit
US5732784A (en) * 1996-07-25 1998-03-31 Nelson; Jack R. Cutting means for drag drill bits
US5769986A (en) 1996-08-13 1998-06-23 Northrop Grumman Corporation Stress-free bonding of dissimilar materials
US6026918A (en) * 1997-10-10 2000-02-22 Briese Industrial Technologies, Inc. Roof bolt bit
US6039127A (en) * 1998-03-13 2000-03-21 Loudon Enterprises, Inc. Rock drill
DE19923792A1 (de) * 1999-05-25 2000-11-30 Hawera Probst Gmbh Bohrwerkzeug
US6374931B1 (en) * 1999-11-03 2002-04-23 Relton Corporation Multiple cutter rotary hammer bit
DE10117262A1 (de) * 2001-01-17 2002-07-18 Hilti Ag Gesteinsbohrer
FR2832944B1 (fr) * 2001-12-05 2004-01-16 Commissariat Energie Atomique Procede d'assemblage de deux pieces ayant des cotes precises et application au brasage d'un accelerateur linac rfq
US7513319B2 (en) 2004-06-08 2009-04-07 Devall Donald L Reamer bit
US7228922B1 (en) 2004-06-08 2007-06-12 Devall Donald L Drill bit
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US7571780B2 (en) * 2006-03-24 2009-08-11 Hall David R Jack element for a drill bit
US8522897B2 (en) * 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US7637574B2 (en) 2006-08-11 2009-12-29 Hall David R Pick assembly
US8567532B2 (en) 2006-08-11 2013-10-29 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US8714285B2 (en) * 2006-08-11 2014-05-06 Schlumberger Technology Corporation Method for drilling with a fixed bladed bit
US8622155B2 (en) * 2006-08-11 2014-01-07 Schlumberger Technology Corporation Pointed diamond working ends on a shear bit
US8616305B2 (en) * 2006-08-11 2013-12-31 Schlumberger Technology Corporation Fixed bladed bit that shifts weight between an indenter and cutting elements
US8292372B2 (en) * 2007-12-21 2012-10-23 Hall David R Retention for holder shank
US9051795B2 (en) 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US8590644B2 (en) * 2006-08-11 2013-11-26 Schlumberger Technology Corporation Downhole drill bit
US9145742B2 (en) 2006-08-11 2015-09-29 Schlumberger Technology Corporation Pointed working ends on a drill bit
US8960337B2 (en) 2006-10-26 2015-02-24 Schlumberger Technology Corporation High impact resistant tool with an apex width between a first and second transitions
EP2669033B1 (fr) 2012-05-29 2015-11-04 Black & Decker Inc. Tête de coupe pour un foret.
US10507534B2 (en) 2016-03-17 2019-12-17 O-Tags, Inc. Systems, methods, and apparatus for reliably installing survey tags
CN115506731A (zh) * 2022-11-10 2022-12-23 湖南五新隧道智能装备股份有限公司 一种凿岩机快速换杆装置

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10306645B3 (de) * 2003-02-18 2004-04-08 Hilti Ag Schlagdrehbohrer mit Hartstoffschneiden

Also Published As

Publication number Publication date
DE3569957D1 (en) 1989-06-08
EP0169402A2 (fr) 1986-01-29
DE3426977A1 (de) 1986-01-30
EP0169402A3 (en) 1986-12-10
US4729441A (en) 1988-03-08

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