EP0452255B1 - Gesteinsbohrer - Google Patents

Gesteinsbohrer Download PDF

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Publication number
EP0452255B1
EP0452255B1 EP91810185A EP91810185A EP0452255B1 EP 0452255 B1 EP0452255 B1 EP 0452255B1 EP 91810185 A EP91810185 A EP 91810185A EP 91810185 A EP91810185 A EP 91810185A EP 0452255 B1 EP0452255 B1 EP 0452255B1
Authority
EP
European Patent Office
Prior art keywords
cutting
rock drill
pins
diameter
cutting pins
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
EP91810185A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0452255A3 (en
EP0452255A2 (de
Inventor
Gerhard Rumpp
Josef Obermeier
Josef Fünfer
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.)
Hilti AG
Original Assignee
Hilti 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 Hilti AG filed Critical Hilti AG
Publication of EP0452255A2 publication Critical patent/EP0452255A2/de
Publication of EP0452255A3 publication Critical patent/EP0452255A3/de
Application granted granted Critical
Publication of EP0452255B1 publication Critical patent/EP0452255B1/de
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
    • E21B10/56—Button-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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58—Chisel-type inserts

Definitions

  • the invention relates to a rock drill with a shank and a drill head, which on its end face pointing in the feed direction has a cutting plate which extends at least over the diameter of the rock drill and at least two cutting pins arranged rotationally symmetrically to the longitudinal axis of the shaft, the cutting pins lying on a diameter of the rock drill having the diameter of the rock drill on which the cutting insert lies forms an angle deviating from 90 °, and the number of cutting pins on both sides of the cutting insert is the same.
  • Rock drills are used to make holes in rock, concrete, masonry and the like, which are used to hold fasteners, pass through pipes and cables and to blow up.
  • Rock drills which represent a combination of cutting plate and cutting pins, have the advantage that the drilling material removed from the cutting plate is further reduced by the cutting pins.
  • Such rock drills are known for example from DE-OS 35 44 433.
  • a rock drill which has the features of the preamble of claim 1, with a drill head, a shaft, a cutting plate and two cutting pins is known, the cutting plate projecting beyond the diameter of the drilling head and the cutting pins on one diameter are arranged on both sides of the cutting plate.
  • the cutting edges of the insert have a concave contour in the normal projection towards the insert plane.
  • the free ends of the cutting pins of this known rock drill can protrude beyond the surface of revolution formed by the cutting edge, so that they serve to roughen the bottom of the borehole.
  • the invention has for its object to provide a rock drill which, with a high excavation rate, increases the size of the drillings. Smooth running of the rock drill and compliance with an exact drilling geometry and a more uniform pre-stroke speed are guaranteed.
  • a symmetrical arrangement is achieved by arranging the cutting pins on the diameter on both sides of the cutting plate.
  • the arrangement of the cutting pins in a rotationally symmetrical manner with respect to the longitudinal axis of the shank leads to an increased smooth running of the rock drill and compliance with an exact drilling geometry is ensured.
  • the free ends of the cutting pins do not lie in the rotational surface formed by the cutting edges of the cutting plate, but are set back slightly, preferably, for example, 0.3 mm to 1.5 mm in the drilling direction.
  • the feed rate during the drilling process becomes more even, since the cutting pins come into contact with the substrate at almost the same time as the cutting plate. This means that the subsoil is dismantled more evenly.
  • the cutting pins support the drill head in the feed direction.
  • the acute angle enclosed between the two diameters is advantageously between 40 ° and 70 °. Such an angle has proven particularly useful because, in the area of the complementary obtuse angle, the arrangement of sufficiently large discharge grooves on the end face is particularly favored.
  • a spiral is regularly connected to the discharge grooves, which determines the direction of rotation of the rock drill.
  • the acute angle which is formed by the diameter of the cutting plate and the diameter on which the cutting pins lie is preferably arranged on the side of the cutting plate facing away from the direction of rotation.
  • the drill head 2 is provided with discharge passages 6, 10 which run in the longitudinal direction and which serve for the passage of the cuttings from the end face 3 of the drill head 2 pointing in the feed direction to the shank 1.
  • the drill head 2 is provided with a centrally arranged cutting plate 4.
  • the cutting plate 4 projects beyond the drilling head 2 both in the radial direction and in the feed direction.
  • cutting pins 5 are arranged, which lie on a diameter that includes an acute angle a with the diameter of the cutting plate 4. This acute angle a is - as shown in FIG. 3 - arranged on the side of the cutting plate 4 facing away from the direction of rotation D.
  • the section shown in Fig. 3 clearly shows the arrangement of the cutting pins 5 in an inclined direction to the longitudinal axis of the shaft.
  • the cutting pins 5 are inserted so deeply into the drilling head 2 that the free ends of the cutting pins 5 lie below the rotary surface formed by the cutting edges 7, 8 of the cutting plate 4.

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)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Walking Sticks, Umbrellas, And Fans (AREA)
EP91810185A 1990-04-09 1991-03-21 Gesteinsbohrer Expired - Lifetime EP0452255B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4011441 1990-04-09
DE4011441A DE4011441A1 (de) 1990-04-09 1990-04-09 Gesteinsbohrer

Publications (3)

Publication Number Publication Date
EP0452255A2 EP0452255A2 (de) 1991-10-16
EP0452255A3 EP0452255A3 (en) 1992-10-28
EP0452255B1 true EP0452255B1 (de) 1994-12-14

Family

ID=6404062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810185A Expired - Lifetime EP0452255B1 (de) 1990-04-09 1991-03-21 Gesteinsbohrer

Country Status (8)

Country Link
EP (1) EP0452255B1 (pl)
JP (1) JP2880584B2 (pl)
AT (1) ATE115677T1 (pl)
AU (1) AU631054B2 (pl)
CA (1) CA2040052C (pl)
DE (2) DE4011441A1 (pl)
ES (1) ES2066407T3 (pl)
PL (1) PL165702B1 (pl)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998021442A1 (de) 1996-11-11 1998-05-22 Hawera Probst Gmbh Gesteinsbohrer
WO2001088321A1 (de) 2000-05-19 2001-11-22 Hawera Probst Gmbh Gesteinsbohrer
US6446741B1 (en) 1999-09-16 2002-09-10 Gebrueder Heller Dinklage Gmbh Rock drill
DE10208631A1 (de) * 2002-02-28 2003-09-11 Hawera Probst Gmbh Bohrwerkzeug
DE10351183A1 (de) * 2003-11-03 2005-06-02 Illinois Tool Works Inc., Glenview Gesteinsbohrer
US7001120B2 (en) 2001-10-12 2006-02-21 Hawera Probst Gmbh Drilling tool
US7861807B2 (en) 2008-12-03 2011-01-04 Black & Decker Inc. Drill bit including one piece cutting head

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4419641A1 (de) * 1994-06-04 1995-12-07 Hilti Ag Gesteinsbohrer
AT1513U1 (de) * 1995-11-23 1997-06-25 Techmo Entw & Vertriebs Gmbh Bohrkrone
DE19545646A1 (de) * 1995-12-07 1997-06-12 Hilti Ag Drehschlag-Wendelbohrer
DE19734094A1 (de) * 1996-11-11 1998-05-14 Hawera Probst Gmbh Gesteinsbohrer
DE19703994B4 (de) * 1997-02-03 2006-04-20 Drebo Werkzeugfabrik Gmbh Bohrer
DE19811887A1 (de) 1998-03-18 1999-09-23 Plica Werkzeugfabrik Ag Mollis Hammerbohrwerkzeug
EP0943780A3 (de) * 1998-03-18 2000-07-19 Plica Werkzeugfabrik Ag Bohrwerkzeug
DE29901296U1 (de) 1999-01-26 1999-06-10 Plica Werkzeugfabrik Ag, Mollis Bohrwerkzeug
DE19944406C2 (de) * 1999-09-16 2003-07-31 Heller Dinklage Gmbh Geb Gesteinsbohrer
DE10334610B4 (de) * 2003-07-29 2006-04-20 Hilti Ag Bohrkopf
CN101010482B (zh) * 2004-08-25 2014-04-09 三菱综合材料株式会社 挖掘工具及钢管超前支护方法
KR20110128694A (ko) * 2010-05-24 2011-11-30 태양파워(주) 드릴 비트

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0428953Y2 (pl) * 1986-12-02 1992-07-14
DE3825107C2 (de) * 1988-07-23 1996-07-11 Hilti Ag Gesteinsbohrer mit Schneidplatte

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998021442A1 (de) 1996-11-11 1998-05-22 Hawera Probst Gmbh Gesteinsbohrer
US6446741B1 (en) 1999-09-16 2002-09-10 Gebrueder Heller Dinklage Gmbh Rock drill
WO2001088321A1 (de) 2000-05-19 2001-11-22 Hawera Probst Gmbh Gesteinsbohrer
US6868924B2 (en) 2000-05-19 2005-03-22 Hawera Probst Gmbh Rock drill
US7001120B2 (en) 2001-10-12 2006-02-21 Hawera Probst Gmbh Drilling tool
DE10208631A1 (de) * 2002-02-28 2003-09-11 Hawera Probst Gmbh Bohrwerkzeug
US6976549B2 (en) 2002-02-28 2005-12-20 Hawera Probst Gmbh Drilling tool
DE10351183A1 (de) * 2003-11-03 2005-06-02 Illinois Tool Works Inc., Glenview Gesteinsbohrer
US7861807B2 (en) 2008-12-03 2011-01-04 Black & Decker Inc. Drill bit including one piece cutting head

Also Published As

Publication number Publication date
JPH04228796A (ja) 1992-08-18
AU7415991A (en) 1991-10-10
EP0452255A3 (en) 1992-10-28
AU631054B2 (en) 1992-11-12
ES2066407T3 (es) 1995-03-01
JP2880584B2 (ja) 1999-04-12
CA2040052A1 (en) 1991-10-10
ATE115677T1 (de) 1994-12-15
EP0452255A2 (de) 1991-10-16
DE4011441A1 (de) 1991-10-10
PL165702B1 (pl) 1995-01-31
DE59103840D1 (de) 1995-01-26
PL289787A1 (en) 1991-10-21
CA2040052C (en) 1998-09-29

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