US20070193784A1 - Rock drilling head - Google Patents

Rock drilling head Download PDF

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Publication number
US20070193784A1
US20070193784A1 US11/703,004 US70300407A US2007193784A1 US 20070193784 A1 US20070193784 A1 US 20070193784A1 US 70300407 A US70300407 A US 70300407A US 2007193784 A1 US2007193784 A1 US 2007193784A1
Authority
US
United States
Prior art keywords
drilling head
drilling
diameter
rock drilling
rinsing
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
US11/703,004
Inventor
Kay Heemann
Wolfgang Ludwig
Uwe Bohn
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: BOHN, UWE, HEEMANN, KAY, LUDWIG, WOLFGANG
Publication of US20070193784A1 publication Critical patent/US20070193784A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
    • B28D1/146—Tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B10/38—Percussion drill bits characterised by conduits or nozzles for drilling fluids
    • 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
    • B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
    • B23B2270/62—Use of suction

Definitions

  • a rock drilling head having a drilling diameter between 25 mm and 60 mm formed of no more than five separate parts and including at least one rinsing channel formed in the outer surface of the drilling head and expanding from the outer surface inward in the form of a nozzle, and having a diameter(s) amounting to between 1/20 and 1 ⁇ 5 of the drilling diameter.
  • the rinsing channel expands from the outer surface with a cone angle between 3° and 30°, which ensures a sufficiently large widening of the cross-section inwardly.
  • two rinsing channels which are advantageously arranged symmetrically with respect to the drilling axis, so that with blocking of one of the rinsing channels, at least one other rinsing channel is available.
  • the rock drilling head is formed of only one base member and only one hard material insert extending diametrically over the drilling diameter and secured in a groove formed in the one base member. This ensures an economical production of the rock drilling head with few process steps.
  • a drilling head 1 for a rock drill which is shown in FIGS. 1-2 , has drilling diameter D of 35 mm and two rinsing channels 2 located on opposite sides of a drilling head axis A.
  • the rinsing channels 2 have a rinsing channel diameter S at an outer surface 3 and equal to about 1/10 of the drilling diameter D.
  • the rinsing channels 2 expand conically inward from the outer surface 3 in form of a nozzle with a cone angle ⁇ of 20° that constantly diminishes further inward.
  • the drilling head 1 is formed of exactly two separate parts, a base member 4 of steel cashing and a hard material insert 5 secured in a groove 6 of the base member 4 .
  • the hard material insert 5 extends diametrically over the drilling diameter D and forms drilling cutters 7 ,

Abstract

A rock drilling head (1) with a drilling diameter (D) between 25 mm and 60 mm and formed of no more than five separate parts, has at least one rinsing channel (2) formed in the outer surface (3) of the drilling head and expanding from the outer surface (3) inward in form of a nozzle, the rinsing channel having a diameter (S) amounting to between 1/20 and ⅕ of the drilling diameter (D).

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to a rock drilling head provided with hard material means and having rinsing channels and designed for use, in particular, in blast shot drills or injection self-drilling anchors.
  • 2. Description of the Prior Art
  • Such mass-produced drilling heads, to which the present invention is limited, have, at a drilling diameter between 25 mm and 60 mm, a small degree of complexity. So the number of separate parts, such as hard material inserts that form cutters, is limited, for manufacturing reasons, to a small number, maximum five. Dependent on the type of a to-be-drilled underground, these rock drilling heads are operated in a wet drilling process with low (5 to 30 bar) water pressures or in a dry drilling process with aspiration of drillings (with suction pressure 0.3 to 0.7 bar), with the rinsing or suction taking place through the rinsing channels having a rinsing channel diameter between 1/20 and ⅕ of the drilling diameter.
  • U.S. Pat. No. 4,185,708 discloses such a rock drilling head equipped with hard material cutter means and having cylindrical rinsing channels formed directly of the drilling head base body and having different channel diameters.
  • U.S. Pat. No. 4,540,056 discloses a rock drilling head equipped with hard material cutter means with a drilling diameter of 2.5 cm replaceably secured in head support in which special high pressure nozzles, which are formed as screw-in inserts, are screwed in cylindrical openings. The opening diameter of the high-pressure nozzles is too narrow to provide for removal of drillings at a dry drilling or to obtain, at wet drilling with a low water pressure, a necessary rinsing medium flow.
  • An object of the present invention is to provide a rock drilling head equipped with hard material cutter means, having a drilling diameter between 25 mm and 60 mm, rinsing channels suitable for both wet and dry drilling, and suitable for mass production.
    • SUMMARY OF THE INVENTION
  • This and other objects of the present invention, which will become apparent hereinafter, are achieved by providing a rock drilling head having a drilling diameter between 25 mm and 60 mm formed of no more than five separate parts and including at least one rinsing channel formed in the outer surface of the drilling head and expanding from the outer surface inward in the form of a nozzle, and having a diameter(s) amounting to between 1/20 and ⅕ of the drilling diameter.
  • With a rinsing channel that constantly expands inwardly in the form of a nozzle (along the flow and having a concave, conical, or convex profile and being, in flow cross-section, rotationally symmetrical, completely symmetrical, and asymmetrical), the drillings, which are aspirated from outside in the rinsing channel in the dry drilling process, cannot be detained there because the cross-section of the rinsing channel constantly widens inward. During wet drilling with low-pressure rinsing means, with the flow directed from the interior outwardly, a high flow velocity is achieved in the narrowing outer region of the rinsing channel, and the drillings, which are accumulated in the rinsing channel, are subjected to the dynamic pressure of the rinsing medium flow and are carried along.
  • Advantageously, the rinsing channel expands from the outer surface with a cone angle between 3° and 30°, which ensures a sufficiently large widening of the cross-section inwardly.
  • Advantageously, there are provided two rinsing channels which are advantageously arranged symmetrically with respect to the drilling axis, so that with blocking of one of the rinsing channels, at least one other rinsing channel is available.
  • Advantageously, the rock drilling head is formed of a base member formed as a casting, with the rinsing channel being advantageously formed during casting.
  • Advantageously, the rock drilling head is formed of only one base member and only one hard material insert extending diametrically over the drilling diameter and secured in a groove formed in the one base member. This ensures an economical production of the rock drilling head with few process steps.
  • The novel features of the present invention which are considered as characteristic for the invention, are set forth in the appended claims. The invention itself, however, both as to its construction and its mode of operation, together with additional advantages and objects thereof, will be best understood from the following detailed description of preferred embodiment, when read with reference to the accompanying drawings.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The drawings show:
  • FIG. 1 a longitudinal cross-sectional view of a rock drilling head according to the present invention along line I-I in FIG. 2 in three planes; and
  • FIG. 2 a plan view of the rock drilling head according to the present invention.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • A drilling head 1 for a rock drill, which is shown in FIGS. 1-2, has drilling diameter D of 35 mm and two rinsing channels 2 located on opposite sides of a drilling head axis A. The rinsing channels 2 have a rinsing channel diameter S at an outer surface 3 and equal to about 1/10 of the drilling diameter D. The rinsing channels 2 expand conically inward from the outer surface 3 in form of a nozzle with a cone angle α of 20° that constantly diminishes further inward. The drilling head 1 is formed of exactly two separate parts, a base member 4 of steel cashing and a hard material insert 5 secured in a groove 6 of the base member 4. The hard material insert 5 extends diametrically over the drilling diameter D and forms drilling cutters 7,
  • Though the present invention was shown and described with references to the preferred embodiment, such is merely illustrative of the present invention and is not to be construed as a limitation thereof and various modifications of the present invention will be apparent to those skilled in the art. It is therefore not intended that the present invention be limited to the disclosed embodiment or details thereof, and the present invention includes all variations and/or alternative embodiments within the spirit and scope of the present invention as defined by the appended claims.

Claims (7)

1. A rock drilling head having a drilling diameter (D) between 25 mm and 60 mm and formed of no more than five separate parts, comprising an outer surface (3); and at least one rinsing channel (2) formed in the outer surface (3) and expanding from the outer surface (3) inward in form of a nozzle, and having a diameter (S) amounting to between 1/20 and ⅕ of the drilling diameter (D).
2. A rock drilling head according to claim 1, wherein the rinsing channel (2) expands with a cone angle (α) between 3° and 30°.
3. A rock drilling head according to claim 1, comprising a further rinsing channel (2).
4. A rock drilling head according to claim 1, comprising a base member (4).
5. A rock drilling head according to claim 4, wherein the base member (4) is formed as a steel casting.
6. A rock drilling head according to claim 4, further comprising a hard material insert (5) extending diametrically over the drilling diameter (D) and secured in a groove (6) formed in the base member (4).
7. A rock drilling head according to claim 1, comprising only one base member (4), and only one hard material insert (5) extending diametrically over the drilling diameter (D) and secured in a groove (6) formed in the one base member (4).
US11/703,004 2006-02-20 2007-02-06 Rock drilling head Abandoned US20070193784A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006000081A DE102006000081A1 (en) 2006-02-20 2006-02-20 rock drill
DE102006000081.1 2006-02-20

Publications (1)

Publication Number Publication Date
US20070193784A1 true US20070193784A1 (en) 2007-08-23

Family

ID=38288551

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/703,004 Abandoned US20070193784A1 (en) 2006-02-20 2007-02-06 Rock drilling head

Country Status (4)

Country Link
US (1) US20070193784A1 (en)
AU (1) AU2007200580A1 (en)
DE (1) DE102006000081A1 (en)
NZ (1) NZ553100A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170122037A1 (en) * 2015-10-29 2017-05-04 Robert L. Morse Apparatus and Method of Manufacture for a Mechanical Radial Drilling Cutting Head
WO2018050267A1 (en) * 2016-09-19 2018-03-22 Ceratizit Luxembourg S.A.R.L. Drill head and drilling tool
EP3421163A1 (en) * 2017-06-27 2019-01-02 HILTI Aktiengesellschaft Drill for chiselling rock
EP3421162A1 (en) * 2017-06-27 2019-01-02 HILTI Aktiengesellschaft Drill for chiselling rock
US20200215674A1 (en) * 2017-06-27 2020-07-09 Hilti Aktiengesellschaft Drill for Chiselling Rock

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4239159A1 (en) * 2022-03-04 2023-09-06 Sandvik Mining and Construction Tools AB Central flushing channel comprising id marker

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522045A (en) * 1948-05-21 1950-09-12 Silas A Knowles Bit for rock drilling
US2628821A (en) * 1950-10-07 1953-02-17 Kennametal Inc Percussion drill bit body
US3131779A (en) * 1962-02-01 1964-05-05 Jersey Prod Res Co Erosion resistant nozzle assembly and method for forming
US4185708A (en) * 1976-08-31 1980-01-29 Akademia Gorniczo-Hunicza im, Stanislawa Staszica Bit for drilling holes in rocks
US4190125A (en) * 1977-11-09 1980-02-26 Fansteel Inc. Drill bit and steel combination for improved fluid flow
US4301877A (en) * 1980-03-10 1981-11-24 Hughes Tool Company Clad mud nozzle
US4330044A (en) * 1981-01-02 1982-05-18 Orr . . . Screw Machine Products, Inc. Drill bit
US4540056A (en) * 1984-05-03 1985-09-10 Inco Limited Cutter assembly
US4819748A (en) * 1987-02-20 1989-04-11 Truscott Aaron S Roof drill bit
US5150636A (en) * 1991-06-28 1992-09-29 Loudon Enterprises, Inc. Rock drill bit and method of making same
US5429199A (en) * 1992-08-26 1995-07-04 Kennametal Inc. Cutting bit and cutting insert
US5732784A (en) * 1996-07-25 1998-03-31 Nelson; Jack R. Cutting means for drag drill bits

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522045A (en) * 1948-05-21 1950-09-12 Silas A Knowles Bit for rock drilling
US2628821A (en) * 1950-10-07 1953-02-17 Kennametal Inc Percussion drill bit body
US3131779A (en) * 1962-02-01 1964-05-05 Jersey Prod Res Co Erosion resistant nozzle assembly and method for forming
US4185708A (en) * 1976-08-31 1980-01-29 Akademia Gorniczo-Hunicza im, Stanislawa Staszica Bit for drilling holes in rocks
US4190125A (en) * 1977-11-09 1980-02-26 Fansteel Inc. Drill bit and steel combination for improved fluid flow
US4301877A (en) * 1980-03-10 1981-11-24 Hughes Tool Company Clad mud nozzle
US4330044A (en) * 1981-01-02 1982-05-18 Orr . . . Screw Machine Products, Inc. Drill bit
US4540056A (en) * 1984-05-03 1985-09-10 Inco Limited Cutter assembly
US4819748A (en) * 1987-02-20 1989-04-11 Truscott Aaron S Roof drill bit
US5150636A (en) * 1991-06-28 1992-09-29 Loudon Enterprises, Inc. Rock drill bit and method of making same
US5429199A (en) * 1992-08-26 1995-07-04 Kennametal Inc. Cutting bit and cutting insert
US5732784A (en) * 1996-07-25 1998-03-31 Nelson; Jack R. Cutting means for drag drill bits

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170122037A1 (en) * 2015-10-29 2017-05-04 Robert L. Morse Apparatus and Method of Manufacture for a Mechanical Radial Drilling Cutting Head
WO2018050267A1 (en) * 2016-09-19 2018-03-22 Ceratizit Luxembourg S.A.R.L. Drill head and drilling tool
EP3421163A1 (en) * 2017-06-27 2019-01-02 HILTI Aktiengesellschaft Drill for chiselling rock
EP3421162A1 (en) * 2017-06-27 2019-01-02 HILTI Aktiengesellschaft Drill for chiselling rock
WO2019002040A1 (en) * 2017-06-27 2019-01-03 Hilti Aktiengesellschaft Drill for chiseling stone
WO2019002037A1 (en) * 2017-06-27 2019-01-03 Hilti Aktiengesellschaft Drill bit for chiselling rock
CN110799298A (en) * 2017-06-27 2020-02-14 喜利得股份公司 Drill bit for working rock by drilling
US20200156163A1 (en) * 2017-06-27 2020-05-21 Hilti Aktiengesellschaft Drill for Chiseling Stone
US20200215674A1 (en) * 2017-06-27 2020-07-09 Hilti Aktiengesellschaft Drill for Chiselling Rock
JP2020525677A (en) * 2017-06-27 2020-08-27 ヒルティ アクチエンゲゼルシャフト Drill bit for rock chiseling
JP2020525675A (en) * 2017-06-27 2020-08-27 ヒルティ アクチエンゲゼルシャフト Drills for rock chiseling
US11125019B2 (en) 2017-06-27 2021-09-21 Hilti Aktiengesellschaft Drill bit for chiselling rock
US11691204B2 (en) * 2017-06-27 2023-07-04 Hilti Aktlengesellschaft Drill for chiseling stone
US11850716B2 (en) * 2017-06-27 2023-12-26 Hilti Aktiengesellschaft Drill for chiselling rock

Also Published As

Publication number Publication date
AU2007200580A1 (en) 2007-09-06
DE102006000081A1 (en) 2007-08-23
NZ553100A (en) 2008-05-30

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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:HEEMANN, KAY;LUDWIG, WOLFGANG;BOHN, UWE;REEL/FRAME:018978/0937

Effective date: 20070125

STCB Information on status: application discontinuation

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