EP0653544A2 - Foret hélicoidal - Google Patents

Foret hélicoidal Download PDF

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Publication number
EP0653544A2
EP0653544A2 EP94810518A EP94810518A EP0653544A2 EP 0653544 A2 EP0653544 A2 EP 0653544A2 EP 94810518 A EP94810518 A EP 94810518A EP 94810518 A EP94810518 A EP 94810518A EP 0653544 A2 EP0653544 A2 EP 0653544A2
Authority
EP
European Patent Office
Prior art keywords
grooves
shank
rock drill
width
groove
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
EP94810518A
Other languages
German (de)
English (en)
Other versions
EP0653544B1 (fr
EP0653544A3 (fr
Inventor
Axel Neukirchen
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 EP0653544A2 publication Critical patent/EP0653544A2/fr
Publication of EP0653544A3 publication Critical patent/EP0653544A3/fr
Application granted granted Critical
Publication of EP0653544B1 publication Critical patent/EP0653544B1/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
    • E21B10/44—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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/22—Rods or pipes with helical structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/909—Having peripherally spaced cutting edges
    • Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
    • Y10T408/9097—Spiral channel

Definitions

  • the invention relates to a rock drill with a drill head, a shank and an insertion end opposite the drill head, the shank having at least one helical conveying spiral and the back of the conveying spiral forming the outside diameter being penetrated by grooves.
  • the spiral-shaped conveying coils on the shank of known rock drills guide the drilling material removed during the drilling process - analogous to a screw conveyor - from the deepest of the borehole.
  • these rock drills are operated in ever smaller drilling rigs that are more powerful in terms of impact energy.
  • the need for turning power, which results, among other things, from the friction between the back of the production helix and the borehole wall, has remained essentially constant, since a reduction in the total back width of the production helix would have a disadvantageous effect on the routing of the rock drill underground.
  • a rock drill is known, the shaft of which has a conveying helix, the back of which has grooves arranged in the circumferential direction at intervals which are inclined with respect to the longitudinal axis of the drill.
  • a reduction in the back surface interacting with the borehole wall can be seen in the broadest sense of this known rock drill.
  • a performance gain which is achieved by less friction of the back against the borehole wall due to a smaller back surface, is destroyed again by the projecting parts of the groove-like profile hanging on the partly rough surface of the borehole wall and thus overall the friction of the rock drill in this way increase.
  • the invention has for its object to provide a rock drill, the helix ensures good guidance of the rock drill in a borehole during the machining process and at the same time generates less friction on the borehole wall.
  • the width of the back of the conveyor helix is constant over the entire length of the conveyor helix.
  • the grooves arranged on the back of this conveyor helix are preferably arranged in such a way that the grooves are arranged one behind the other at equal intervals along the central axis of the shaft.
  • the width of the grooves is therefore also dependent on the outer diameter of the shaft.
  • the ratio between the width of the groove and the diameter of the shank is expediently 0.05: 1 to 0.3: 1.
  • the grooves are in particular only designed such that the bottom of the groove is set back slightly in the radial direction with respect to the back of the conveyor helix.
  • the depth of the groove must be such that the majority of the particles of the drilling material are larger than the depth of the groove. Since the particle size of the drilling material is in turn dependent on the diameter of the rock drill, the depth of the groove is in a specific ratio to the outside diameter of the shank, this ratio preferably being 0.02: 1 to 0.05: 1.
  • the width of the groove can be designed differently with respect to the width of the back of the conveyor spiral.
  • the grooves on the back of the production helix are made wider, so that less back surface of the production helix can come into contact with the borehole wall . Machining hard materials requires grooves with a smaller width.
  • the ratio between the width of the grooves and the width of the back of the conveyor spiral is expediently 0.8: 1 to 6: 1.
  • the rock drill shown in FIGS. 1 and 2 has a drill head 1, a shank 2 and an insertion end 3 opposite the drill head 1.
  • the shank 2 has, for example, two helical conveying spirals 4, 5, the backs 6, 7 forming the outer diameter the feed coils 4, 5 are penetrated by grooves 8, 9.
  • the grooves 8, 9 run in planes that extend at right angles to the longitudinal axis of the rock drill and are axially offset from one another.
  • a soldered hard metal plate 10 In the end area of the drill head 2 there is a soldered hard metal plate 10, the outer contour of which slightly exceeds the outer diameter of the shank 2.
  • the grooves 8, 9 are arranged one behind the other at equal intervals A along the central axis of the shaft 2.
  • the width B of the grooves 8, 9 is dependent on the width R of the back 6, 7 of the conveyor helix 4, 5.
  • the depth T of the grooves 8, 9 is dependent on the outer diameter D of the shaft 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP94810518A 1993-11-11 1994-09-07 Foret hélicoidal Expired - Lifetime EP0653544B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4338490A DE4338490A1 (de) 1993-11-11 1993-11-11 Spiralbohrer
DE4338490 1993-11-11

Publications (3)

Publication Number Publication Date
EP0653544A2 true EP0653544A2 (fr) 1995-05-17
EP0653544A3 EP0653544A3 (fr) 1995-11-02
EP0653544B1 EP0653544B1 (fr) 1998-06-17

Family

ID=6502330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94810518A Expired - Lifetime EP0653544B1 (fr) 1993-11-11 1994-09-07 Foret hélicoidal

Country Status (6)

Country Link
US (1) US5503237A (fr)
EP (1) EP0653544B1 (fr)
JP (1) JPH07180464A (fr)
CN (1) CN1038702C (fr)
DE (2) DE4338490A1 (fr)
DK (1) DK0653544T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2116321A1 (fr) * 2008-05-09 2009-11-11 Irwin Industrial Tools GmbH Outil de forage, notamment foret hélicoïdal
DE102008022945A1 (de) * 2008-05-09 2009-12-03 Irwin Industrial Tools Gmbh Bohrwerkzeug, insbesondere Spiralbohrer
WO2011139960A1 (fr) * 2010-05-04 2011-11-10 Illinois Tool Works Inc. Trépan, dispositif et procédé de production d'un trépan

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19648868A1 (de) * 1996-11-26 1998-05-28 Hilti Ag Bohrwerkzeug mit hohlzylinderförmigem Trägerkörper
DE19753731A1 (de) * 1997-12-04 1999-06-10 Hawera Probst Gmbh Gesteinsbohrwerkzeug
DE10015203A1 (de) 2000-03-27 2001-10-04 Hilti Ag Wendelbohrer
DE10053343B4 (de) * 2000-10-27 2009-04-16 Hilti Aktiengesellschaft Wendelbohrer
DE10142560A1 (de) * 2001-08-30 2003-03-20 Hilti Ag Bohrkopf mit einem Schneidelement
DE102009033942A1 (de) * 2009-07-14 2011-01-20 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG Bohrer
DE102009038516A1 (de) * 2009-08-25 2011-03-03 Illinois Tool Works Inc., Glenview Gesteinsbohrer
DE102012112781A1 (de) 2012-12-20 2014-06-26 Walter Ag Spiralbohrer
US11007583B2 (en) 2016-02-14 2021-05-18 Hongjia Wang Twist drill
JP6699836B2 (ja) * 2017-06-13 2020-05-27 住友電工ハードメタル株式会社 ドリル

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1740761A (en) * 1926-06-21 1929-12-24 Berry Francois Jacq Barthelemy Machine for rock or coal cutting
DE803291C (de) * 1949-01-26 1951-04-02 Victor Products Ltd Kohle- und Gesteins-Drehbohrer mit Schneckengang

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE493510A (fr) *
US1307525A (en) * 1919-06-24 Ice-cutting tool
US1955768A (en) * 1932-12-17 1934-04-24 William E Mcdermott Coal auger bit
US3147646A (en) * 1961-10-19 1964-09-08 Universal American Corp Special purpose drill
DE2013327B1 (de) * 1970-03-20 1971-05-13 Werkzeugbau Gmbh, 8130 Starnberg Gesteinsbohrer fur Drehschlagbohr maschinen
US3667857A (en) * 1970-10-30 1972-06-06 Nat Twist Drill & Tool Co Combined drill and reamer construction
CH581520A5 (en) * 1974-04-08 1976-11-15 Lilette Finanz & Immobilien Fluted cutting tool with threaded periphery - has stronger incomplete thread at leading edge
US4285618A (en) * 1979-10-12 1981-08-25 Shanley Stephen E Jr Rotary milling cutter
JPS63283809A (ja) * 1987-05-12 1988-11-21 G N Tool Kk ニック付ドリルリ−マ
DE3919095A1 (de) * 1988-07-16 1990-01-18 Hawera Probst Kg Hartmetall Bohrwerkzeug
US4953642A (en) * 1989-03-20 1990-09-04 Skaggs Roger D Rock drill bit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1740761A (en) * 1926-06-21 1929-12-24 Berry Francois Jacq Barthelemy Machine for rock or coal cutting
DE803291C (de) * 1949-01-26 1951-04-02 Victor Products Ltd Kohle- und Gesteins-Drehbohrer mit Schneckengang

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2116321A1 (fr) * 2008-05-09 2009-11-11 Irwin Industrial Tools GmbH Outil de forage, notamment foret hélicoïdal
DE102008022945A1 (de) * 2008-05-09 2009-12-03 Irwin Industrial Tools Gmbh Bohrwerkzeug, insbesondere Spiralbohrer
WO2011139960A1 (fr) * 2010-05-04 2011-11-10 Illinois Tool Works Inc. Trépan, dispositif et procédé de production d'un trépan

Also Published As

Publication number Publication date
EP0653544B1 (fr) 1998-06-17
EP0653544A3 (fr) 1995-11-02
CN1107928A (zh) 1995-09-06
US5503237A (en) 1996-04-02
DE59406265D1 (de) 1998-07-23
DK0653544T3 (da) 1999-04-06
CN1038702C (zh) 1998-06-10
JPH07180464A (ja) 1995-07-18
DE4338490A1 (de) 1995-05-18

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