EP0322565A1 - Trépan de roche - Google Patents

Trépan de roche Download PDF

Info

Publication number
EP0322565A1
EP0322565A1 EP88119572A EP88119572A EP0322565A1 EP 0322565 A1 EP0322565 A1 EP 0322565A1 EP 88119572 A EP88119572 A EP 88119572A EP 88119572 A EP88119572 A EP 88119572A EP 0322565 A1 EP0322565 A1 EP 0322565A1
Authority
EP
European Patent Office
Prior art keywords
cutting
main
drill
secondary cutting
cutting plate
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
EP88119572A
Other languages
German (de)
English (en)
Other versions
EP0322565B1 (fr
Inventor
Bernhard Moser
Wolfgang Dipl.-Ing. Peetz
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 EP0322565A1 publication Critical patent/EP0322565A1/fr
Application granted granted Critical
Publication of EP0322565B1 publication Critical patent/EP0322565B1/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

  • Rock drills with carbide inserts are used to drill holes in concrete, masonry, stone or the like.
  • So-called cross-cutting has become known in order to reduce stress and thus wear on the hard metal cutting insert arranged transversely in the drill head, with a roof-shaped inclined main cutting insert extending over the entire diameter of the drill head and secondary cutting inserts arranged transversely thereto.
  • Such a drill is shown, for example, in US Pat. No. 2,673,716, in particular FIG. 2.
  • the cross-cutting inserts can also be formed from two mutually perpendicular plates with corresponding incisions.
  • the secondary cutting inserts consist of two parts which, when put together, would result in a symmetrical, roof-shaped cutting insert.
  • the tip of each secondary cutting insert pointing in the direction of drilling feed is accordingly arranged as close as possible to the main cutting edge for a stepless transition (US Pat. No. 2,673,716, FIG. 3).
  • a drilling tool has become known from DE 35 44 433-A1, with a main cutting edge penetrating the drill head diameter and additional cutting pins which are arranged radially off-center.
  • the invention has for its object to improve such tools and in particular to propose a drill head geometry for a cross-cutting head, which has a higher wear resistance with improved drilling feed when struck or hammering.
  • the measures should be carried out as inexpensively as possible.
  • a high chisel effect is generated by a high surface pressure when striking or hammering, i. H. the striking stress must be carried out with the smallest possible chisel surface and high impact force.
  • the carbide cutting element is extremely resilient and wear-resistant in relation to the pure impact stress. H. Little wear occurs in the area of the drill center axis with lower cutting speeds than radially outside.
  • each auxiliary cutting insert is also provided with a chisel tip according to the invention, which is achieved by a roof-shaped design of the auxiliary cutting insert, so that the auxiliary cutting insert represents a geometric reduction of the main cutting insert.
  • the tip of the roof-shaped main cutting plate acts in the central area alone, since this results in a high surface pressure and thus a good chiseling effect. Only in the radially further outer area does the additional effect of the roof-shaped secondary cutting insert begin, which then also promotes penetration into the material to be machined with its chisel tip and leads to an improved explosive effect in the rock. The radially further outer area of the main cutting plate is thus relieved by the secondary cutting plate, so that overall less wear occurs with improved efficiency.
  • the design of the drill according to subclaim 2 has the advantage that, with a symmetrical design of the secondary cutting insert, standard commercial parts which are available as a mass product can be used. As a result, the cost of producing the rock drill according to the invention is considerably reduced. In addition, less is required due to the use of roof-shaped secondary cutting inserts Tungsten carbide material than when the secondary cutting edge is continued up to the center of the drill head. This also reduces the cost of production.
  • the secondary cutting insert can also be designed asymmetrically, the part facing the main cutting insert can be shortened. However, the chisel tip of the secondary cutting insert must be preserved.
  • the cutting of the main and secondary cutting elements pointing in the drilling feed direction lie on a common cutting cone surface. This is useful in order to use the chisel tip of each secondary cutting insert equally and simultaneously with the main cutting insert when penetrating into the material to be drilled.
  • the chisel tips of the secondary cutting plates and the corresponding arrangement in the common cutting cone surface improve the penetration behavior and the blasting effect.
  • the axial groove depth for the main cutting insert is larger than that of the secondary cutting insert.
  • this has the advantage that the groove base of the main cutting insert and that of the secondary cutting inserts lie at different axial heights, as a result of which the cross section of the drill head is not unnecessarily weakened by the grooves at a cutting height.
  • auxiliary cutting inserts can also be made in one piece in special cases, with corresponding incisions in the main and auxiliary cutting insert.
  • the secondary cutting insert is immediately adjacent to the main cutting insert.
  • the secondary cutting insert can also be made narrower and form a distance from the main cutting insert. If you halved each secondary cutting insert again, an acute angle would result as the chisel angle of the secondary cutting insert. This would result in a material saving of hard metal, but the wear of the respective chisel tip would increase.
  • the tip of each asymmetrical secondary insert should therefore also form an obtuse angle as that of the main insert, so that the minimum width is determined thereby.
  • the cross cutting inserts formed from main and secondary cutting inserts, are used in a drill head with a square or circular cross section.
  • the design of the drill head determines the face resistance and the drilling dust grooves in the area of the drill head for the removal of the cuttings.
  • the secondary cutting insert and / or the main cutting insert can be designed in a zigzag shape on its cutting surface in order to form a plurality of chisel tips for each insert.
  • the drill head is designated by reference number (2) and the conveying spiral or the spiral shaft is designated by reference number (3).
  • the conveyor helix (3) can be single-start or double-start.
  • the drill head (2) has a roof-shaped inclined main cutting plate (4) which extends over the entire diameter d 1 of the drill head and is designed in a manner known per se.
  • the tip angle ⁇ is formed as an obtuse angle, with a size of ⁇ 130 °.
  • the main cutting plate (4) has cutting edges (5) and a plate thickness s 1 and a height h 1 and is inserted into a groove (6) with the groove depth t 1 in the drill head (2).
  • the rock drill (1) has two secondary cutting plates (7, 8) which are arranged transversely to the main cutting plate (4) next to the latter.
  • Characteristic of the secondary cutting plates (7, 8) is the symmetrical design of these cutting elements with the axis of symmetry (9) and the roof-shaped design of the respective cutting edges (10) with the chisel tips (16).
  • the cutting conical surface (11) of the main cutting insert corresponds to the cutting conical surface of the secondary cutting inserts (7, 8), ie the cutting surfaces of the main and secondary cutting inserts lie in the same cutting plane.
  • the tip angle ⁇ of the main cutting insert is approximately the same size as the tip angle ⁇ of the secondary cutting insert (7, 8).
  • the solder gap between the secondary cutting inserts (7, 8) and the main cutting insert (4) must also be taken into account.
  • the height h2 of the secondary cutting plates (7, 8) is made smaller than the height h1 of the main cutting plate. This results in a smaller groove t2 of the associated groove.
  • the groove base (12) for the main cutting insert (4) lies much deeper in the drill head than the groove base (13) of the secondary cutting insert (7, 8). This avoids a cross-sectional weakening of the drill head.
  • the drill head can have a circular cross-section (14) (shown in dashed lines) or a square cross-section (15).
  • the main cutting insert (4) and the two secondary cutting inserts (7, 8) arranged transversely thereto are always inserted in this cross section.
  • the roof-shaped design of the secondary cutting inserts results in the radially outer chisel tips (16) in the middle of the cutting edges (10) of the secondary cutting inserts (7, 8).
  • the outer diameter d 1 of the main insert (4) normally corresponds to the outer diameter d 1 formed by the two secondary inserts (7, 8). In special cases, however, the nominal diameter d 1 formed by the main cutting plate (4) can be larger than the circumferential diameter of the two secondary cutting plates (7, 8).
  • Fig. 3b the main cutting plate (4) and the secondary cutting plates (7, 8) are aligned in a drill head (2) with a square cross section perpendicular to the side edges instead of the diagonal arrangement according to Fig. 3a.
  • FIG. 3c shows the arrangement of the main cutting plate (4) and secondary cutting plates (7, 8), with the cutting edges (5) and (10) of the cutting plates and the radially outwardly displaced chisel tips (16) through the Roof-shaped arrangement of the secondary cutting plates (7, 8).
  • the drill head shape according to FIG. 3d represents a further variant of a cross cutting head, the main cutting plate (4) and the secondary cutting plates (7, 8) in turn being provided in a roof-shaped configuration.
  • all of the cutting plates (4 or 7, 8) are designed as standard parts or standard parts, as a result of which the production is cheaper.

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)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)
EP88119572A 1987-12-16 1988-11-24 Trépan de roche Expired - Lifetime EP0322565B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873742661 DE3742661A1 (de) 1987-12-16 1987-12-16 Gesteinsbohrer
DE3742661 1987-12-16

Publications (2)

Publication Number Publication Date
EP0322565A1 true EP0322565A1 (fr) 1989-07-05
EP0322565B1 EP0322565B1 (fr) 1993-01-20

Family

ID=6342759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119572A Expired - Lifetime EP0322565B1 (fr) 1987-12-16 1988-11-24 Trépan de roche

Country Status (3)

Country Link
US (1) US4903787A (fr)
EP (1) EP0322565B1 (fr)
DE (2) DE3742661A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5482124A (en) * 1993-12-11 1996-01-09 Hawera Probst Gmbh + Co. Rock drill
EP0715055A3 (fr) * 1994-11-28 1997-01-02 Hilti Ag Outil avec corps de base et élément de coupe
EP0748668A3 (fr) * 1995-06-17 1998-04-29 HILTI Aktiengesellschaft Procédé pour la fabrication d'outils de forage rotatif
US7258180B2 (en) 2003-11-03 2007-08-21 Illinois Tool Works Inc. Rotary hammerdrill bit
CN107120065A (zh) * 2017-07-06 2017-09-01 中铁八局集团昆明铁路建设有限公司 一种地连墙施工斜岩槽段矩形冲击钻钻头和施工方法

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE19516270C1 (de) * 1995-05-09 1997-01-30 Heller Dinklage Gmbh Geb Bohrwerkzeug
DE19545648A1 (de) * 1995-12-07 1997-06-12 Hilti Ag Drehschlag-Wendelbohrer
DE19807394A1 (de) * 1998-02-21 1999-08-26 Hilti Ag Bohr- und/oder Meisselwerkzeug
DE19942987A1 (de) 1999-09-09 2001-03-15 Hilti Ag Bohrwerkzeug
DE19942986A1 (de) * 1999-09-09 2001-03-15 Hilti Ag Bohrwerkzeug
DE19942985A1 (de) * 1999-09-09 2001-03-15 Hilti Ag Bohrwerkzeug
US7097396B1 (en) * 2000-02-16 2006-08-29 Kabushiki Kaisha Miyanaga Drill bit
DE10024433A1 (de) * 2000-05-19 2001-11-29 Hawera Probst Gmbh Gesteinsbohrer
JP2006205277A (ja) * 2005-01-26 2006-08-10 Nachi Fujikoshi Corp 穴あけ工具
US7861807B2 (en) * 2008-12-03 2011-01-04 Black & Decker Inc. Drill bit including one piece cutting head
EP2669033B1 (fr) 2012-05-29 2015-11-04 Black & Decker Inc. Tête de coupe pour un foret.
US9981406B2 (en) * 2015-06-25 2018-05-29 Black & Decker Inc. Drill bit

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763921C (de) * 1943-01-23 1952-04-21 Jakob Usinger Bohrkrone mit Hartmetallschneiden fuer Gesteinsbohrer
US2865606A (en) * 1956-08-13 1958-12-23 Cincinnati Tool Company Rock drill
US3674101A (en) * 1969-04-28 1972-07-04 Hilti Ag Drill construction
DE2510298A1 (de) * 1975-03-10 1976-09-23 Richard Karnebogen Bohrkrone fuer schlagende gesteinsbohrmaschine
US4294319A (en) * 1978-05-16 1981-10-13 Karlheinz Guergen Cutter head for rotary percussion drills
GB2075409A (en) * 1980-05-09 1981-11-18 Vnii Tugoplavkikh Drills
DE3426977A1 (de) * 1984-07-21 1986-01-30 Hawera Probst Gmbh + Co, 7980 Ravensburg Gesteinsbohrer
EP0251220A1 (fr) * 1986-06-26 1988-01-07 Hawera Probst GmbH + Co. Outil de forage
EP0281997A1 (fr) * 1987-03-11 1988-09-14 Hawera Probst GmbH + Co. Fleuret à rocher

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1106966A (en) * 1913-11-28 1914-08-11 Harper Steward N Drill.
DE919402C (de) * 1950-09-02 1954-10-21 Bosch Gmbh Robert Gesteinsbohrer
US2673716A (en) * 1950-09-02 1954-03-30 Clyde E Avery Bit
GB832238A (en) * 1956-10-08 1960-04-06 Rawlplug Co Ltd Improvements in or relating to rotary masonry drills
US3760894A (en) * 1971-11-10 1973-09-25 M Pitifer Replaceable blade drilling bits
DE2841679C3 (de) * 1978-09-25 1982-12-09 Karlheinz 2101 Harmstorf Guergen Gesteinsbohrkrone zum Drehschlagbohren
DE3020284A1 (de) * 1980-05-28 1981-12-03 Vsesojuznyj naučno-issledovatel'skij i proektno-konstruktorskij institut mechanizirovannogo i ručnogo stroitel'nogo instrumenta, vibratorov i stroitel'no-otdeločnych mašin VNISMI, Chimki, Movskovskaja oblast' Wendelbohrer
NL8105491A (nl) * 1981-12-07 1983-07-01 Berghe Rene Van Den Boorkop.
DE3426987A1 (de) * 1984-07-21 1986-01-30 Schering AG, 1000 Berlin und 4709 Bergkamen Verfahren zur herstellung von unter feuchtigkeitsausschluss lagerstabilen kunstharzmassen und deren verwendung
DE3544433C2 (de) * 1985-12-16 1995-12-14 Hilti Ag Gesteinsbohrer
DE3608861A1 (de) * 1986-03-08 1987-09-10 Fischer Artur Werke Gmbh Bohrer

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763921C (de) * 1943-01-23 1952-04-21 Jakob Usinger Bohrkrone mit Hartmetallschneiden fuer Gesteinsbohrer
US2865606A (en) * 1956-08-13 1958-12-23 Cincinnati Tool Company Rock drill
US3674101A (en) * 1969-04-28 1972-07-04 Hilti Ag Drill construction
DE2510298A1 (de) * 1975-03-10 1976-09-23 Richard Karnebogen Bohrkrone fuer schlagende gesteinsbohrmaschine
US4294319A (en) * 1978-05-16 1981-10-13 Karlheinz Guergen Cutter head for rotary percussion drills
GB2075409A (en) * 1980-05-09 1981-11-18 Vnii Tugoplavkikh Drills
DE3426977A1 (de) * 1984-07-21 1986-01-30 Hawera Probst Gmbh + Co, 7980 Ravensburg Gesteinsbohrer
EP0251220A1 (fr) * 1986-06-26 1988-01-07 Hawera Probst GmbH + Co. Outil de forage
EP0281997A1 (fr) * 1987-03-11 1988-09-14 Hawera Probst GmbH + Co. Fleuret à rocher

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5482124A (en) * 1993-12-11 1996-01-09 Hawera Probst Gmbh + Co. Rock drill
EP0715055A3 (fr) * 1994-11-28 1997-01-02 Hilti Ag Outil avec corps de base et élément de coupe
US5735648A (en) * 1994-11-28 1998-04-07 Hilti Aktiengesellschaft Tool bit with carrier member and cutting member
EP0748668A3 (fr) * 1995-06-17 1998-04-29 HILTI Aktiengesellschaft Procédé pour la fabrication d'outils de forage rotatif
US7258180B2 (en) 2003-11-03 2007-08-21 Illinois Tool Works Inc. Rotary hammerdrill bit
CN107120065A (zh) * 2017-07-06 2017-09-01 中铁八局集团昆明铁路建设有限公司 一种地连墙施工斜岩槽段矩形冲击钻钻头和施工方法
CN107120065B (zh) * 2017-07-06 2024-01-30 中铁八局集团昆明铁路建设有限公司 一种地连墙施工斜岩槽段矩形冲击钻钻头和施工方法

Also Published As

Publication number Publication date
DE3877732D1 (de) 1993-03-04
EP0322565B1 (fr) 1993-01-20
DE3742661A1 (de) 1989-07-13
US4903787A (en) 1990-02-27

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