US20190112876A1 - Tool for roughening a borehole surface - Google Patents

Tool for roughening a borehole surface Download PDF

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Publication number
US20190112876A1
US20190112876A1 US15/759,506 US201615759506A US2019112876A1 US 20190112876 A1 US20190112876 A1 US 20190112876A1 US 201615759506 A US201615759506 A US 201615759506A US 2019112876 A1 US2019112876 A1 US 2019112876A1
Authority
US
United States
Prior art keywords
tool
borehole
tool head
head
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.)
Abandoned
Application number
US15/759,506
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English (en)
Inventor
Markus Renner
Franz Popp
Hans-Peter Lederle
Rainer Strobel-Schmidt
Peter Ostermeier
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
Assigned to HILTI AKTIENGESELLSCHAFT reassignment HILTI AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STROBEL-SCHMIDT, RAINER, LEDERLE, HANS-PETER, OSTERMEIER, PETER, POPP, FRANZ, RENNER, MARKUS
Publication of US20190112876A1 publication Critical patent/US20190112876A1/en
Abandoned 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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/0018—Drills for enlarging a hole
    • B23B51/0027—Drills for enlarging a hole by tool swivelling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P9/00—Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings; Features of such surfaces not otherwise provided for, their treatment being unspecified
    • B23P9/02—Treating or finishing by applying pressure, e.g. knurling
    • 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
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring

Definitions

  • the invention relates to a tool for roughening a borehole surface, with a coupling portion for clamping the tool in a drilling machine and a tool head for machining the borehole surface, wherein the tool head has an outer shell surface on which cutting means are disposed.
  • Tools and methods of the type mentioned in the introduction for roughening a borehole surface are therefore used in particular to increase the load-bearing capacity of chemical mortar compounds in diamond-drilled holes.
  • the relatively smooth inner shell surface of a borehole is structured and, for example, provided with defined undercuts.
  • DE 31 43 462 A1 and DE 38 19 650 A1 respectively describe tools on the tool shank of which a separate conical contact face is provided, to enable a user to superpose a wobbling motion manually on the tool rotation. In this way, the tool head is deflected in radial direction and penetrates into the borehole surface.
  • the technical problem underlying the present invention is to specify, for roughening the surface of a borehole, a tool that does not exhibit the disadvantages described in the foregoing or at least exhibits them to a lesser extent, and in particular permits roughening of a borehole surface in simple and cost-effective manner.
  • a tool for roughening a borehole surface with a coupling portion for clamping the tool in a drilling machine and a tool head for machining the borehole surface, wherein the tool head has an outer shell surface on which cutting means protruding laterally from the shell surface are disposed.
  • the outer shell surface has a camber along the longitudinal direction of the tool.
  • the cambered outer contour of the tool head can be used as a guide surface for a swiveling motion of the user.
  • the tool may be moved from a first angular orientation to a second angular orientation by making the cambered tool head roll over the borehole surface along the longitudinal direction of the tool.
  • a change between two angular orientations means swiveling of the longitudinal axis of the tool relative to a longitudinal or center axis of the borehole.
  • the shell surface has a maximum diameter, which is disposed centrally with respect to a longitudinal extent of the tool head. In this way, uniform guidance of the tool by the user is favored during swiveling of the tool.
  • the camber of the shell surface can be configured particularly symmetrically, and the outer contour can describe a circular-arc segment, for example, in a cross section along the longitudinal axis of the tool.
  • the cutting means of the tool may comprise pins of a cutting material, especially carbide or diamond, wherein the pins are distributed circumferentially with an angular spacing.
  • a cutting material especially carbide or diamond
  • the pins are distributed circumferentially with an angular spacing.
  • the pins may be disposed with an angular spacing with respect to the longitudinal axis of the tool, wherein the angular spacing is 30° to 180°, preferably 60° to 150°, more preferably 120°.
  • the angular spacing is 30° to 180°, preferably 60° to 150°, more preferably 120°.
  • at least three pins may be distributed at an angular spacing of 120° on the outer shell surface of the tool head. In this way the wear of the tool head can be reduced, since the contact of the tool head with the borehole surface is largely determined by the pins and consequently wear of the outer shell surface carrying the pins is reduced.
  • the maximum diameter of the tool head is smaller than the nominal diameter of a borehole to be machined.
  • the maximum diameter of the tool head may be defined by carbide pins which, disposed on the cambered shell surface, describe an envelope circle with a diameter smaller than the nominal diameter of the borehole to be machined.
  • the coupling portion is disposed at a first end of a tool shank and the tool head at an opposite, second end of the tool shank, wherein the tool shank has a diameter smaller than that of the tool head. Consequently, the tool shank is offset in radial direction relative to the tool head. A clearance is therefore formed between the tool shank and the borehole surface, and so free space is created for the user to guide the tool.
  • the tool shank is at least as long as the tool head in axial direction.
  • the tool is therefore also suitable for machining boreholes in the region of the borehole bottom, wherein the borehole depth corresponds to twice the axial length of the tool head.
  • the axial length of the tool head may correspond to at least nine times the maximum diameter of the tool head.
  • the tool head can be equipped with carbide or diamond pins distributed over its entire axial length.
  • the axial length of the tool head may correspond to at least nine times the nominal diameter of a borehole to be machined. With such a tool, it is ensured that the roughened region of the borehole surface extends over a sufficient length in axial direction. Especially for drilling of blind holes, there is no need to blow out or clean the borehole despite accumulation of drilling dust in the region of the borehole bottom, since an adequately large roughened surface is available.
  • the tool head may be equipped with carbide or diamond pins distributed over the entire axial length.
  • the largest diameter of the tool head should be at least 30% larger than the diameter of a tool shank joining the tool head and the coupling portion.
  • FIG. 1 shows a first configuration of an inventive tool in a perspective view, a front view and a side view
  • FIG. 2 shows a second configuration of an inventive tool in a perspective view, a front view and two side views.
  • FIG. 1 shows a tool 10 for roughening a borehole surface (not illustrated) in a perspective view, a front view and a side view.
  • Tool 10 has a coupling portion 12 for clamping tool 10 in a drilling machine (not illustrated) and a tool head 14 for machining a borehole surface.
  • Tool head 14 has an outer shell surface 16 .
  • Cutting means 18 which project radially relative to shell surface 16 , are disposed on outer shell surface 16 .
  • Outer shell surface 16 has a camber along the longitudinal direction a of the tool, as is apparent in side view.
  • Shell surface 16 has a maximum diameter D 1 , which is disposed centrally with respect to the longitudinal extent of tool head 14 . Starting from maximum diameter D 1 , shell surface 16 tapers in the direction of a front end 20 and an opposite end 22 at the shank, respectively to a minimum diameter D 2 smaller than diameter D 1 . In other words, the outer shell surface in side view is bowed outward in a radial direction r.
  • the cutting means provided on shell surface 16 comprise carbide pins 18 , which are distributed circumferentially with an angular spacing of 120° and also axially along longitudinal axis A of the tool.
  • the axial longitudinal extent of tool head 14 is larger than nine times the maximum diameter D 3 of the tool head.
  • Maximum diameter D 3 of tool head 14 is determined by the diameter of the envelope circle of those carbide pins 18 that are disposed in the region of maximum diameter D 1 of the shell surface.
  • the axial longitudinal extent of the tool head is larger than nine times the nominal diameter of the borehole to be machined.
  • Coupling portion 12 is disposed at a first end of a tool shank 24 and tool head 14 at an opposite, second end of tool shank 24 .
  • Tool shank 24 has a diameter smaller than that of tool head 14 .
  • the axial length of tool shank 24 corresponds substantially to the axial length of tool head 14 .
  • the inventive tool 10 is clamped in a drilling machine (not illustrated).
  • Tool 10 is introduced together with the tool head into a borehole (not illustrated).
  • the nominal diameter of the borehole is preferably larger than the maximum diameter D 3 of tool head 14 .
  • the drilling machine executes rotation of tool 10 , while a swiveling or stirring motion is superposed on this rotation by the user.
  • Cambered tool head 14 is guided by the user along the borehole surface, so that the guidance of tool 10 is predetermined by the shape of tool head 14 . In this way, uniform roughening of the borehole surface can be achieved.
  • due to the circumferential distribution of carbide pins 18 the wear of tool 10 in the region of outer shell surface 16 is reduced, especially at the height of maximum diameter D 1 .
  • FIG. 2 shows a further configuration of a tool 10 , wherein this alternative configuration is characterized by a changed shape of coupling portion 12 , which has a diameter larger than the shank diameter.
  • the tool is constructed such that the tool head has a largest diameter that is at least 30% larger than the diameter of the tool shank.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Milling Processes (AREA)
US15/759,506 2015-09-23 2016-09-19 Tool for roughening a borehole surface Abandoned US20190112876A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP15186462.6A EP3147056A1 (de) 2015-09-23 2015-09-23 Werkzeug zum aufrauen einer bohrlochoberfläche
EP15186462.6 2015-09-23
PCT/EP2016/072149 WO2017050688A1 (de) 2015-09-23 2016-09-19 Werkzeug zum aufrauen einer bohrlochoberfläche

Publications (1)

Publication Number Publication Date
US20190112876A1 true US20190112876A1 (en) 2019-04-18

Family

ID=54199011

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/759,506 Abandoned US20190112876A1 (en) 2015-09-23 2016-09-19 Tool for roughening a borehole surface

Country Status (8)

Country Link
US (1) US20190112876A1 (de)
EP (2) EP3147056A1 (de)
JP (1) JP2018530458A (de)
CN (1) CN108271368A (de)
AU (1) AU2016328527A1 (de)
CA (1) CA2998794A1 (de)
RU (1) RU2018114710A (de)
WO (1) WO2017050688A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0795677A2 (de) * 1996-03-16 1997-09-17 HILTI Aktiengesellschaft Bohrwerkzeug
US20060201670A1 (en) * 2005-03-14 2006-09-14 Stable Services Limited Downhole apparatus
US8376043B2 (en) * 2006-12-12 2013-02-19 Halliburton Energy Services, Inc. Downhole scraping and/or brushing tool and related methods

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3143462A1 (de) 1981-11-03 1983-05-11 Hawera Probst Gmbh + Co, 7980 Ravensburg Bohrwerkzeug
DE3819650A1 (de) 1988-01-28 1989-12-14 Fischer Artur Werke Gmbh Bohrvorrichtung zur herstellung von bohrloechern mit hinterschneidung
JP3404301B2 (ja) * 1998-11-09 2003-05-06 理研ダイヤモンド工業株式会社 アンカーの施工方法及び切削ビット
JP4477397B2 (ja) * 2004-03-30 2010-06-09 サンコーテクノ株式会社 ドリル工具およびこれを用いた下孔の内周面の切削方法
JP5567929B2 (ja) * 2010-07-30 2014-08-06 前田建設工業株式会社 アンカーの施工方法及び目粗ビット
CN104105811B (zh) * 2012-03-06 2017-03-22 日产自动车株式会社 喷镀膜面的精加工方法及加工用刀具
DE102014202066A1 (de) * 2014-02-05 2015-08-06 Schaeffler Technologies AG & Co. KG Bohrvorrichtung und Verfahren zum Einbringen einer Bohrung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0795677A2 (de) * 1996-03-16 1997-09-17 HILTI Aktiengesellschaft Bohrwerkzeug
US20060201670A1 (en) * 2005-03-14 2006-09-14 Stable Services Limited Downhole apparatus
US8376043B2 (en) * 2006-12-12 2013-02-19 Halliburton Energy Services, Inc. Downhole scraping and/or brushing tool and related methods

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Spangenberg et al., Drilling Tool, published 17 September 1997, including English translation from German (Year: 1997) *

Also Published As

Publication number Publication date
JP2018530458A (ja) 2018-10-18
AU2016328527A1 (en) 2018-03-29
CA2998794A1 (en) 2017-03-30
RU2018114710A (ru) 2019-10-23
EP3147056A1 (de) 2017-03-29
WO2017050688A1 (de) 2017-03-30
CN108271368A (zh) 2018-07-10
RU2018114710A3 (de) 2020-02-13
EP3352935A1 (de) 2018-08-01

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Owner name: HILTI AKTIENGESELLSCHAFT, LIECHTENSTEIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RENNER, MARKUS;POPP, FRANZ;LEDERLE, HANS-PETER;AND OTHERS;SIGNING DATES FROM 20180212 TO 20180219;REEL/FRAME:045180/0316

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION