EP0402624A2 - Trépan à rotation percussion pour un appareil de forage portatif - Google Patents

Trépan à rotation percussion pour un appareil de forage portatif Download PDF

Info

Publication number
EP0402624A2
EP0402624A2 EP90108763A EP90108763A EP0402624A2 EP 0402624 A2 EP0402624 A2 EP 0402624A2 EP 90108763 A EP90108763 A EP 90108763A EP 90108763 A EP90108763 A EP 90108763A EP 0402624 A2 EP0402624 A2 EP 0402624A2
Authority
EP
European Patent Office
Prior art keywords
hard metal
drill
metal pins
peripheral
drill 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.)
Granted
Application number
EP90108763A
Other languages
German (de)
English (en)
Other versions
EP0402624A3 (fr
EP0402624B1 (fr
Inventor
Gerhard Schroth
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.)
Friedrich Duss Maschinenfabrik & Co GmbH
Original Assignee
Friedrich Duss Maschinenfabrik & Co 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 Friedrich Duss Maschinenfabrik & Co GmbH filed Critical Friedrich Duss Maschinenfabrik & Co GmbH
Publication of EP0402624A2 publication Critical patent/EP0402624A2/fr
Publication of EP0402624A3 publication Critical patent/EP0402624A3/fr
Application granted granted Critical
Publication of EP0402624B1 publication Critical patent/EP0402624B1/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
    • E21B10/56—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
    • E21B10/36—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
    • E21B10/44—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

Definitions

  • the invention relates to a drill according to the preamble of claim 1.
  • the receiving bore for the polygonal pins is designed so that they can be inserted almost fittingly into the drill, ie centering.
  • the solder introduced prior to the insertion of the hard metal pin is distributed during the heating and insertion of the hard metal pin in the spaces between the inner circumferential surface of the receiving bore and the flat peripheral surfaces of the polygonal hard metal pin. This results in a significantly better anchoring in comparison to the analog anchoring of hard metal pins with a round cross-sectional profile, which cannot be exactly centered when inserted into the associated mounting hole.
  • the peripheral carbide pins can be inserted into the peripheral mounting holes in such a way that they radially protrude over the adjacent lateral surface of the drill head along an outer longitudinal edge even before the drill is used (without taking into account the expected wear).
  • the peripheral hard metal pins can be used parallel to the drilling axis or with an inclination of preferably 3 °. It has been shown that with such an arrangement and design of the hard metal pins, the dimensional accuracy of the drill in the area of the drill head over a longer period of time than with conventional drills. The holes as such are also more accurate. They have an exact curve. Exposure of the outer hard metal pins is prevented because the outer surface of the drill head is protected from wear by the protruding longitudinal edge of the hard metal pins. Finally, tests have shown that the drilling progress can be up to approximately 10% higher than conventional drills with hard metal pins with a round cross-sectional profile. The increase in drilling progress compared to these conventional drills increases with increasing wear of the drill.
  • the rotary impact drill hereinafter referred to as the 'drill', is intended and suitable for rotary impact drilling in concrete, stone and the like by means of an electropneumatic drilling device which can be operated by hand.
  • the drill head 10 made of steel has approximately cylindrical lateral surfaces 10a at least in diametrical areas of its outer circumference.
  • Hard metal pins 11, 11 ' are anchored with axial sections of the same diameter in cylindrical receiving bores 12 (FIG. 7) of the drill head 10. They are received and soldered in such an arrangement in the receiving bores that at least two peripheral hard metal pins 11 'protrude radially over their entire length over the adjacent lateral surface 10a of the drill head.
  • the hard metal pins 11, 11 ' have a polygonal cross-sectional profile.
  • peripheral hard metal pins 11 project radially over their entire length over the adjacent lateral surface 10a of the drill head in such a way that they lie along their outer longitudinal edge 11a outside the axial projection of the rotary impact drill.
  • the peripheral hard metal pins 11 ' close an angle alpha to the drill axis aa, which is about 3 °. * with two longitudinal edges
  • the end faces of the hard metal pins 11, 11 ' are formed by two surfaces enclosing an angle of approximately 90 ° to one another, which adjoin one another in a cutting edge running perpendicular to the pin axis bb and radially to the drill axis aa.
  • the cross-sectional profile of the axial sections received in the receiving bores 12 corresponds to FIG Carbide pins 11, 11 'a regular octagon.
  • the hard metal pin 11 which is embedded and centrally arranged in the end face in the formation 10b is larger than the other peripheral or non-central hard metal pins.
  • the coaxial hard metal pin 11 is arranged so that it projects beyond the other hard metal pins 11 'in the axial direction.
  • the end face of this hard metal pin 11, which is coaxial with the drill axis aa, is formed by four surfaces of the same plan. These four surfaces adjoin each other to form four cutting edges 11c '.
  • the cutting edges run along radial lines Y, X (FIG. 11). Two cutting edges 11c 'run along a first radial Y and form an angle of 90 ° to one another. Two further cutting edges 11c ⁇ run along a second radial X perpendicular to the first and form an angle of 135 ° to one another.
  • the cutting edges 11c; 11c ′; 11c ⁇ each * on one level.
  • All hard metal pins 11, 11 'of the drill head 10 have a cross-sectional profile which corresponds to a regular octagon.
  • All peripheral hard metal pins 11 ' have the same size. Serving as a centering element during drilling central hard metal pin 11 is larger than a between the central hard metal pin 11 and a peripheral hard metal pin 11 'embedded hard metal pin 11', which can be as large as the peripheral hard metal pin 11 'or slightly smaller.
  • FIGS. 3 and 4 differs from the exemplary embodiment according to FIGS. 1 and 2 essentially in that the shaft 10a is provided with a conveying helix which conveys the cuttings from the borehole.
  • the embodiment of FIGS. 5 and 6 differs from the exemplary embodiment of FIGS. 3, 4 essentially in that only two peripheral hard metal pins 11 'and in addition a hard metal plate 14 is provided which is perpendicular to a plane c-c in which the peripheral hard metal pins 11' are located.

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)
EP19900108763 1989-06-13 1990-05-10 Trépan à rotation percussion pour un appareil de forage portatif Expired - Lifetime EP0402624B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893919264 DE3919264C2 (de) 1989-06-13 1989-06-13 Drehschlagbohrer für ein von Hand führbares Bohrgerät
DE3919264 1989-06-13

Publications (3)

Publication Number Publication Date
EP0402624A2 true EP0402624A2 (fr) 1990-12-19
EP0402624A3 EP0402624A3 (fr) 1991-07-31
EP0402624B1 EP0402624B1 (fr) 1994-07-20

Family

ID=6382655

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900108763 Expired - Lifetime EP0402624B1 (fr) 1989-06-13 1990-05-10 Trépan à rotation percussion pour un appareil de forage portatif

Country Status (2)

Country Link
EP (1) EP0402624B1 (fr)
DE (1) DE3919264C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109693321A (zh) * 2019-02-13 2019-04-30 大同宇林德石墨设备股份有限公司 一种快速精准定位毛坯石墨电极端面中心孔的工具

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4236553A1 (de) * 1992-10-29 1994-05-05 Hawera Probst Kg Hartmetall Gesteinsbohrer
DE19516270C1 (de) * 1995-05-09 1997-01-30 Heller Dinklage Gmbh Geb Bohrwerkzeug
WO2013136113A1 (fr) * 2012-03-12 2013-09-19 Flexidrill Limited Trépan hybride

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE354355C (de) * 1922-06-08 Otto Pohle Verstellbares zweiteiliges Bohrmesser
FR1174641A (fr) * 1957-05-07 1959-03-13 Diabor Procédé pour la fixation de taillants rapportés sur des outils de coupe et outils de coupe, notamment couronnes de forage, ainsi obtenus
US3581835A (en) * 1969-05-08 1971-06-01 Frank E Stebley Insert for drill bit and manufacture thereof
DE2423511A1 (de) * 1974-05-15 1975-11-27 Krupp Gmbh Bohrer mit foerderwendel
DE2423510A1 (de) * 1974-05-15 1975-11-27 Krupp Gmbh Gesteinsbohrer
DE2522300A1 (de) * 1975-05-20 1976-12-02 Krupp Gmbh Bohrwerkzeug
DE2528003A1 (de) * 1975-06-24 1977-01-20 Krupp Gmbh Gesteinsbohrer
DE3408225A1 (de) * 1984-03-07 1985-09-19 Richard 5383 Kierspe Karnebogen Schlagbohrkrone
US4966500A (en) * 1987-09-16 1990-10-30 Mitsubishi Kinzoku Kabushiki Kaisha Face milling cutter with cutter inserts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109693321A (zh) * 2019-02-13 2019-04-30 大同宇林德石墨设备股份有限公司 一种快速精准定位毛坯石墨电极端面中心孔的工具

Also Published As

Publication number Publication date
EP0402624A3 (fr) 1991-07-31
EP0402624B1 (fr) 1994-07-20
DE3919264A1 (de) 1990-12-20
DE3919264C2 (de) 1997-01-23

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