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US20020046885A1 - Rock drill - Google Patents

Rock drill Download PDF

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Publication number
US20020046885A1
US20020046885A1 US09/942,380 US94238001A US2002046885A1 US 20020046885 A1 US20020046885 A1 US 20020046885A1 US 94238001 A US94238001 A US 94238001A US 2002046885 A1 US2002046885 A1 US 2002046885A1
Authority
US
United States
Prior art keywords
hard material
rock drill
drilling
set forth
facing
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
US09/942,380
Other languages
English (en)
Inventor
Jorg Eichhorn
Harald Geiger
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: GEIGER, HARALD, EICHHORN, JORG
Publication of US20020046885A1 publication Critical patent/US20020046885A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/75—Stone, rock or concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
    • B23B2228/56—Two phase materials

Definitions

  • the invention relates to a rock drill for abrasively working rock or a similar hard material by a movement, which is at least a partially rotating and striking movement with respect to the axis of the drill, with a helical thread and a hard material insert in the drill head.
  • Conventional rock drills have a hard material insert, formed as a hard material plate or as a solid hard material drilling head, which is fastened to the tool head, from which a shaft with a helical thread extends, and finally ends in a plug-in or chuck region for accommodation in a tool device.
  • rock drills with diameters of about 5 mm have main cutting edges as well as subsidiary cutting edges, set at an angle to the main cutting edges.
  • the main cutting edges as well as the subsidiary cutting edges have blunt guiding surfaces, which are disposed at the radial periphery and guide the tool head axially, in that they slide past the inner surface of the borehole.
  • Such guiding surfaces, which cause friction, are dimensioned as small as possible.
  • a rock drill has a solid hard material head with two main cutting edges and two subsidiary cutting edges, the peripheral blunt guiding surfaces of which, extending in each case parallel to the axis of the drill, change over into quadruple helical threads.
  • a twist drill for working materials by cutting, has a tool head with two hard material plates, which form the main cutting edges, and the peripheral, blunt guiding surfaces of which change over into the quadruple helical threads.
  • the individual hard material plates, and the guiding surfaces of which continue the helical threads smoothly are disposed at an angle to the drill axis and are fastened to the tool head by, in each case, one of the side surfaces, and facing the drilling direction.
  • the side surface is integrated in the end region of the helical grooves, which is highly stressed by the cutting operation. An axially striking stress exerted on such a hard material insert would stress the attachment of this insert to the tool head, resulting in failure after a short time.
  • At least one guiding surface of a hard material insert is disposed at an acute angle to the direction of the tool axis.
  • the guiding sector region in the cross sectional plane is enlarged approximately in proportion to the sine of the angle without increasing the friction-producing region of the guiding surface.
  • the hard material insert is fastened only over the surfaces of the insert, which face opposite to the drilling direction or at right angles thereto. With that, the fastening is exclusively for compression and shear stresses and will not fail due to impact stresses.
  • the guiding surface smoothly continues the helical threads, as a result of which the resistance to conveying the excavated material in the helical groove is reduced.
  • the rock drill has a solid hard material head, which is fastened at its surface facing opposite to the drilling direction or oriented perpendicularly thereto.
  • the guiding surface edge of at least one hard material insert forms an acute angle with the direction of the tool axis.
  • the rock drill has a hard material plate, which is fastened with its surfaces, which face opposite the drilling direction or oriented perpendicularly thereto.
  • the guiding surface of at least one hard material insert forms an acute angle with the direction of the tool axis.
  • a hard material plate is fastened only along a surface, facing opposite to the drilling direction, to the remainder of the tool. Furthermore, preferably, a free surface facing in the drilling direction is integrated smoothly into the highly abrasively stressed end region of the helical grooves.
  • the solid material head no longer is completely prismatic.
  • it is produced by injection molding.
  • FIG. 1 is a axially extending side view of a drilling head end of a first rock drill
  • FIG. 2 is a axially extending side view of a drilling head end of a second rock drill.
  • a rock drill 1 with a quadruple helical thread 2 , has a solid hard material head which has main cutting edges 4 and is mounted on the drilling head end of an axially extending shaft on which the helical threads 2 are formed.
  • the peripherally extending guiding surface 6 of a main cutting edge 4 forms an acute angle ⁇ , with the direction of the shaft A, as a result of which, with respect to a parallel orientation, an enlargement of a guiding sector region 7 is achieved in the cross sectional plane.
  • the solid hard material head 3 is fastened with its rear end surface 8 , facing opposite to the drilling direction, to the remainder of the tool.
  • the guiding surface 6 smoothly continues the helical thread 2 .
  • a double helical thread 2 has two hard material plates 9 , which form main cutting edges 4 of the drilling head and are disposed radially about a central cutting member 10 .
  • the radially outer peripheral guiding surface 6 of a main cutting edge 4 forms an acute angle ⁇ with the direction of the tool axis A and smoothly continues the helical thread 2 .
  • the hard plate 9 With its end surface 8 , facing opposite to the drilling direction, the hard plate 9 is fastened to the drilling head end of the tool.
  • the free cutting surfaces 11 leading in the drilling direction are integrated smoothly into the highly abrasively stressed drilling end region of the helical grooves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)
US09/942,380 2000-09-04 2001-08-29 Rock drill Abandoned US20020046885A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10043417.7 2000-09-04
DE10043417A DE10043417A1 (de) 2000-09-04 2000-09-04 Gesteinsbohrer

Publications (1)

Publication Number Publication Date
US20020046885A1 true US20020046885A1 (en) 2002-04-25

Family

ID=7654839

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/942,380 Abandoned US20020046885A1 (en) 2000-09-04 2001-08-29 Rock drill

Country Status (5)

Country Link
US (1) US20020046885A1 (de)
EP (1) EP1184115A1 (de)
JP (1) JP2002120220A (de)
CN (1) CN1344607A (de)
DE (1) DE10043417A1 (de)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060210949A1 (en) * 2003-03-13 2006-09-21 Hans Stoop Pilot drill, step drill, and drill set for dental implant technology
US20080166194A1 (en) * 2007-01-09 2008-07-10 Durfee Laverne R Drill bit
US20090208300A1 (en) * 2008-02-19 2009-08-20 Irwin Industrial Tool Company Self feed bit
US20100003094A1 (en) * 2007-01-09 2010-01-07 Irwin Industrial Tool Company Drill bit
US20100163314A1 (en) * 2006-09-28 2010-07-01 Wolfgang Rieger Rock drill
US20100307640A1 (en) * 2009-06-03 2010-12-09 Durfee La Verne R Cutting edge and cutting tool
GB2484597A (en) * 2010-10-15 2012-04-18 Kennametal Inc Rotary cutting tool and cutting tip with variable profile
WO2012102966A3 (en) * 2011-01-26 2013-01-24 Longyear Tm, Inc. Drill string components resistant to jamming
USD734792S1 (en) 2013-03-15 2015-07-21 Black & Decker Inc. Drill bit
US9085074B2 (en) 2011-03-22 2015-07-21 Black & Decker Inc. Chisels
USD737875S1 (en) 2013-03-15 2015-09-01 Black & Decker Inc. Drill bit
US20150298224A1 (en) * 2014-04-17 2015-10-22 Kennametal Inc. Rotating tool and tool head
US9333564B2 (en) 2013-03-15 2016-05-10 Black & Decker Inc. Drill bit
JP2016142127A (ja) * 2015-02-03 2016-08-08 正二 伊藤 掘削ヘッド
US9850723B2 (en) 2011-01-26 2017-12-26 Bly Ip Inc. Drill string components having multiple-thread joints
US10557316B2 (en) 2011-01-26 2020-02-11 Bly Ip Inc. Drill string components having multiple-thread joints
USD878437S1 (en) * 2018-08-06 2020-03-17 Peter L. Bono Helical fluted forward and reverse rotation cutting tool
USD878438S1 (en) * 2018-08-06 2020-03-17 Peter L. Bono Helical fluted forward and reverse rotation cutting tool
USD1034137S1 (en) * 2022-10-07 2024-07-09 Milwaukee Electric Tool Corporation Drill bit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009060857A1 (de) * 2009-12-30 2011-07-07 Robert Bosch GmbH, 70469 Gesteinsbohrwerkzeug zur dreh-schlagenden Bearbeitung von Beton, Gesteln, Mauerwerk und dergleichen Materialien
CN103912220A (zh) * 2014-04-16 2014-07-09 张振宇 轴对称体外沿轴升旋态鳍装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB832238A (en) * 1956-10-08 1960-04-06 Rawlplug Co Ltd Improvements in or relating to rotary masonry drills
US4352400A (en) * 1980-12-01 1982-10-05 Christensen, Inc. Drill bit
DE3626523A1 (de) * 1986-08-05 1988-02-11 Gustav Weeke Maschinenbau Gmbh Bohrer, insbesondere zum bohren von holz- und holzwerkstoffen
JPH09277108A (ja) * 1996-02-14 1997-10-28 Sumitomo Electric Ind Ltd ドリル
DE19707115A1 (de) * 1997-02-22 1998-08-27 Hilti Ag Bohr- und/oder Meisselwerkzeug

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060210949A1 (en) * 2003-03-13 2006-09-21 Hans Stoop Pilot drill, step drill, and drill set for dental implant technology
US20100163314A1 (en) * 2006-09-28 2010-07-01 Wolfgang Rieger Rock drill
US7913777B2 (en) 2006-09-28 2011-03-29 Robert Bosch Gmbh Rock drill
US20080166194A1 (en) * 2007-01-09 2008-07-10 Durfee Laverne R Drill bit
US20100003094A1 (en) * 2007-01-09 2010-01-07 Irwin Industrial Tool Company Drill bit
US20090208300A1 (en) * 2008-02-19 2009-08-20 Irwin Industrial Tool Company Self feed bit
US8070397B2 (en) 2008-02-19 2011-12-06 Irwin Industrial Tool Company Self feed bit
US20100307640A1 (en) * 2009-06-03 2010-12-09 Durfee La Verne R Cutting edge and cutting tool
GB2484597B (en) * 2010-10-15 2015-10-14 Kennametal Inc Rotary cutting tool and cutting tip with variable profile
GB2484597A (en) * 2010-10-15 2012-04-18 Kennametal Inc Rotary cutting tool and cutting tip with variable profile
US8979445B2 (en) 2010-10-15 2015-03-17 Hanita Metal Factory Ltd Cutting tip and rotary cutting tool employing same
US9810029B2 (en) 2011-01-26 2017-11-07 Bly Ip Inc. Drill string components resistant to jamming
US10570676B2 (en) 2011-01-26 2020-02-25 Bly Ip Inc. Drill string components having multiple-thread joints
US11898404B2 (en) 2011-01-26 2024-02-13 Boart Longyear Company Drill string components having multiple-thread joints
US10557316B2 (en) 2011-01-26 2020-02-11 Bly Ip Inc. Drill string components having multiple-thread joints
US10364618B2 (en) 2011-01-26 2019-07-30 Bly Ip Inc. Drill string components resistant to jamming
US9850723B2 (en) 2011-01-26 2017-12-26 Bly Ip Inc. Drill string components having multiple-thread joints
WO2012102966A3 (en) * 2011-01-26 2013-01-24 Longyear Tm, Inc. Drill string components resistant to jamming
US9333635B2 (en) 2011-03-22 2016-05-10 Black & Decker Inc. Chisels
US9085074B2 (en) 2011-03-22 2015-07-21 Black & Decker Inc. Chisels
US9333564B2 (en) 2013-03-15 2016-05-10 Black & Decker Inc. Drill bit
USD734792S1 (en) 2013-03-15 2015-07-21 Black & Decker Inc. Drill bit
USD737875S1 (en) 2013-03-15 2015-09-01 Black & Decker Inc. Drill bit
US9901994B2 (en) * 2014-04-17 2018-02-27 Kennametal Inc. Rotating tool and tool head
US20150298224A1 (en) * 2014-04-17 2015-10-22 Kennametal Inc. Rotating tool and tool head
JP2016142127A (ja) * 2015-02-03 2016-08-08 正二 伊藤 掘削ヘッド
USD878437S1 (en) * 2018-08-06 2020-03-17 Peter L. Bono Helical fluted forward and reverse rotation cutting tool
USD878438S1 (en) * 2018-08-06 2020-03-17 Peter L. Bono Helical fluted forward and reverse rotation cutting tool
USD1034137S1 (en) * 2022-10-07 2024-07-09 Milwaukee Electric Tool Corporation Drill bit
USD1106788S1 (en) 2022-10-07 2025-12-23 Milwaukee Electric Tool Corporation Drill bit

Also Published As

Publication number Publication date
DE10043417A1 (de) 2002-03-14
EP1184115A1 (de) 2002-03-06
JP2002120220A (ja) 2002-04-23
CN1344607A (zh) 2002-04-17

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Legal Events

Date Code Title Description
AS Assignment

Owner name: HILTI AKTIENGESELLSCHAFT, LIECHTENSTEIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:EICHHORN, JORG;GEIGER, HARALD;REEL/FRAME:012449/0264;SIGNING DATES FROM 20010831 TO 20010929

STCB Information on status: application discontinuation

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