EP1083294B1 - Bohrwerkzeug - Google Patents

Bohrwerkzeug Download PDF

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Publication number
EP1083294B1
EP1083294B1 EP00810787A EP00810787A EP1083294B1 EP 1083294 B1 EP1083294 B1 EP 1083294B1 EP 00810787 A EP00810787 A EP 00810787A EP 00810787 A EP00810787 A EP 00810787A EP 1083294 B1 EP1083294 B1 EP 1083294B1
Authority
EP
European Patent Office
Prior art keywords
drilling tool
head
section
tool according
cross
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.)
Expired - Lifetime
Application number
EP00810787A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1083294A1 (de
Inventor
Werner Kleine
Hans-Werner Bongers
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 EP1083294A1 publication Critical patent/EP1083294A1/de
Application granted granted Critical
Publication of EP1083294B1 publication Critical patent/EP1083294B1/de
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
    • E21B10/58—Chisel-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 drilling tool, in particular a rock drill, according to the preamble of claim 1.
  • Drilling tools used a drill head with cutting of a cutting material, preferably of a hard metal.
  • the drilling tools will be Usually used in hand-held drilling rigs, which in addition to the rotary drive of Drill tool also generate axial shocks.
  • the axial impacts are on the in the Shank end of the drilling tool used discharged and over the shaft and the drill head in the substrate to be processed initiated. In this way, the subsoil is chipped, chiselled and processed dismantled chip by chip.
  • the drilling tools are also a have the highest possible service life.
  • a drilling tool having the features of the preamble of claim 1 is made DE-A-195 37 900 known.
  • Object of the present invention is therefore to overcome these disadvantages of drilling tools of the prior art. It is to be created a drilling tool, at which, regardless of the diameter of the drill head, even in the creation of Drilling in reinforced concrete, the risk of catching the drill head on Reinforcing iron is reduced.
  • the drilling tool should provide a good drilling progress have low power and have a long service life.
  • the drilling tool created by the invention in particular a rock drill, includes a provided with a spigot Shank, the at least two helically encircling discharge grooves for drilling dust having.
  • the carbide-shaped cutting At the opposite end of the shaft is equipped with a drill head, the carbide-shaped cutting has the circumference of the drill head radially overtop.
  • the carbide cutters are separated from each other by head flute grooves, whose number is greater than the number of helical discharge grooves into which they are lead.
  • the Spiralnutabites now a much smaller passage cross-section. This leaves below the Circumferential cutting a longer material web stand, in the head-side Limiting shoulder of Spiralnutabitess ends. This has an advantageous effect on the Guide the drilling tool off. At Arm ists Economicsern-and in particular at Piercing reinforcements is thereby the danger of catching the short Material web behind the reinforcement reduced.
  • the smaller passage cross section of the Spiralnutabitess is conveniently achieved in that at largely constant core diameter of the shaft the opening width of the Spiralnutabitess is smaller than that on the shaft circumference measured opening width of the common discharge groove.
  • the core diameter refers thereby referring to the shaft diameter at the base of the helical shaft circumferential discharge grooves. Due to the largely constant core diameter is a weakening of the head portion of the drilling tool avoided.
  • the drill head has an even number of Cutting, for example, four cutting on.
  • the cutting edges project beyond the circumference the drill head radially and are separated by Kopfmehlnuten.
  • there the Kopfmehlnuten open in pairs in a common Abschreibnut.
  • Out for uniform loading is the drill head of the drilling tool largely symmetrical.
  • the passage cross sections of Spiralnutabête at the transition region of each Kopfmehlnut lies in the respective common Abschreibnut are the same size.
  • the drill head can be a shorter design have as the previously known, generic drilling tools. At a even number of cutting edges is beneficial to the axial support of all cutting edges about the same length.
  • the Spiralnutabitese and the head meal grooves have at least partially the same cross-sectional contour.
  • they can be created with just one tool become.
  • the cutting edges on the drill head of the drilling tool can be used on plate-shaped inserts be arranged in hard metal, which in groove-shaped recesses in the front side of the Drilling head attached, for example, soldered are.
  • the drill head may be formed entirely from hard metal.
  • the Carbide head is with the shaft end, for example by friction welding or similar tightly connected.
  • the hard metal head has the advantage that it almost in can be produced in any shape. The mounting on the shaft is simplified.
  • FIGS. 1-5 like elements carry the same reference numerals.
  • FIG. 1 shows a plan view of an exemplary embodiment of a reference numeral 1 provided drilling tool according to the invention gives an overview of the following further side views, which are shown in Fig. 2-5.
  • the drilling tool 1 comprises a shaft 2, one of which, the rear end of a shank for the Having tool holder of a drill.
  • the drilling tool 1 is equipped with a drill head 5, the cutting 6 -. 9 made of hard metal, which project beyond the drill head 5 axially and radially.
  • illustrated drilling tool 1 has a substantially star-shaped, three-beam Center cutting edge 6 and three peripheral cutting 7 - 9, which at an angular distance of are arranged approximately 120 ° in the peripheral region of the drill head 5 and the drill head. 5 protrude radially. Between the peripheral cutting 7 - 9 are substantially axially extending Kopfmehlnuten 10 - 12 arranged.
  • the first Kopfmehlnut 10 lies between the peripheral cutting 7 and 8 and runs in the direction of rotation of the drilling tool through the arrow R is indicated, the peripheral cutting 8 before.
  • the second head flour groove 11 is located between the peripheral cutting edges 8 and 9 and is associated with the peripheral cutting edge 9, who runs ahead of her.
  • the third Kopfmehlnut 12 is located between the peripheral blades 7 and 9th and is assigned to the peripheral cutting edge 7.
  • a measured at the periphery of the drill head 5 Width of the Kopfmehlnuten 10 - 12 bears the reference b.
  • the Kopfmehlnuten 10 - 12 may have different widths b. According to the However, they are shown to be substantially the same width.
  • the arrows Y, Z, X and W denote different side views of the drilling tool 1 used for Closer explanation of the invention in the order given in Figs. 2-5 are shown.
  • the two discharge grooves 3, 4 revolve around the Shaft 2 helical and follow each other in the axial direction alternately
  • the passage cross sections and the opening widths of the discharge grooves 3, 4 are for example, the same size.
  • the common Abschreibnut a larger passage cross-section and a larger opening width than the second discharge groove.
  • the opening width of second discharge groove 3 for example, designated w.
  • the spiral groove section 13 has a smaller passage cross-section than the helical on the shaft 2 encircling Abschreibnut 3.
  • the opening width s of the Spiralnutabitess 13 smaller than an opening width w of the discharge groove 3 on the shaft circumference.
  • the Spiralnutabterrorism 13 is of two shoulders 14, 17 limited. The insertion end closer shoulder 14 goes continuously into the shoulder 15 of the common Abschreibnut 4 via.
  • the different sized opening widths s and c of the Spiralnutabitess 13 and der common Abschreibnut 4, in which the Spiralnutabrough 13 opens, are in particular in the side view according to arrow X in Fig. 1 can be seen.
  • the passage cross-section Spiralnutabitess 13 about 30% to about 70% of Passage cross-section of the common discharge groove (4).
  • the spiral groove section 13 has a depth t to the drill nominal diameter a ratio of about 1/6 to about 1/3.
  • FIG. 4 shows the drilling tool 1 according to the invention in a side view according to the arrow X in Fig. 1.
  • the cutting head 5 radially superior cutting are again with the Reference numerals 6 - 9 are designated.
  • the illustration shows the two axial Kopfmehlnuten 10 and 11.
  • the peripheral edge 8 associated Kopfmehlnut 10 opens into the Spiralnutabêt 13, which merges into the common Abgaunut 4.
  • the to Circumferential cutting 9 associated Kopfmehlnut 11 opens at the viewer side facing away from the second discharge groove 3.
  • the opening widths c and w of the two helically on the shaft 2 circumferential Abschreibnuten 4, 3 have substantially the same size. From Fig. 4 it can be seen that as a result of the inventive Formation of Spiralnutabitess 13 axially below the peripheral cutting 7 - 9 extending drill head sections in shoulders 17-19 terminate, all approximately on the Height of the same cross section of the drilling tool 1 lie.
  • FIG. 5 shows the drilling tool as seen from the arrow W in FIG
  • This side view shows the course of the Kopfmehlnut 11, the Circumferential cutting 9 is assigned and opens alone and directly into the second discharge groove 3.
  • the invention is based on the example of a drilling tool with a center cutting edge and three Circumferential cutting has been explained.
  • the Carbide cutting also provided on a star-shaped, three-jet insert be, which is fixed in the front end of the shaft.
  • the cutting edges extend falling axially, from a point in the center to the circumference of the drill head, they radial overtop.
  • the Kopfmehlnuten are each arranged between the three cutting edges. at three Kopfmehlnuten open two Kopfmehlnuten in a Spiralnutabexcellent.
  • the third Kopfmehlnut opens into the second on the shaft helically encircling discharge groove. It but can also be provided four carbide cutting.
  • the drill head can be made entirely of hard metal and connected to the shaft, for example, be welded.
  • the one-piece design of the drill head offers the Advantage of a simple, almost arbitrary shaping and is relatively easy to assemble.

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)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
EP00810787A 1999-09-09 2000-09-01 Bohrwerkzeug Expired - Lifetime EP1083294B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19942987 1999-09-09
DE19942987A DE19942987A1 (de) 1999-09-09 1999-09-09 Bohrwerkzeug

Publications (2)

Publication Number Publication Date
EP1083294A1 EP1083294A1 (de) 2001-03-14
EP1083294B1 true EP1083294B1 (de) 2005-12-28

Family

ID=7921281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00810787A Expired - Lifetime EP1083294B1 (de) 1999-09-09 2000-09-01 Bohrwerkzeug

Country Status (5)

Country Link
US (1) US6431295B1 (ja)
EP (1) EP1083294B1 (ja)
JP (1) JP4676051B2 (ja)
DE (2) DE19942987A1 (ja)
DK (1) DK1083294T3 (ja)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2001233611A1 (en) * 2000-03-10 2001-09-17 American Tool Companies A/S Drill bit
DE10024433A1 (de) * 2000-05-19 2001-11-29 Hawera Probst Gmbh Gesteinsbohrer
DE20016012U1 (de) * 2000-09-15 2000-11-30 Drebo Werkzeugfabrik Gmbh, 88361 Altshausen Gesteinsbohrer
DE10053344A1 (de) * 2000-10-27 2002-05-08 Hilti Ag Gesteinsbohrer
DE20021710U1 (de) * 2000-12-22 2001-03-22 Drebo Werkzeugfabrik Gmbh, 88361 Altshausen Gesteinsbohrer
DE10260113A1 (de) * 2002-12-19 2004-07-01 Hawera Probst Gmbh Gesteinsbohrer
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
WO2008100194A2 (en) * 2007-02-14 2008-08-21 Sandvik Intellectual Property Ab A drill bit and a single drilling apparatus
US20090148250A1 (en) * 2007-12-05 2009-06-11 Wayne Chappell Drill 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
EP2669033B1 (en) 2012-05-29 2015-11-04 Black & Decker Inc. Cutting head for a drill bit.
DE102013106614A1 (de) * 2013-06-25 2015-01-08 Heller Tools Gmbh Gesteinsbohrer
AT15312U1 (de) * 2015-07-27 2017-05-15 Johann Eberhard Ges M B H Eisbohrer

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3020284A1 (de) * 1980-05-28 1981-12-03 Vsesojuznyj naučno-issledovatel'skij i proektno-konstruktorskij institut mechanizirovannogo i ručnogo stroitel'nogo instrumenta, vibratorov i stroitel'no-otdeločnych mašin VNISMI, Chimki, Movskovskaja oblast' Wendelbohrer
JPS62130808U (ja) * 1986-02-07 1987-08-18
DE3742661A1 (de) 1987-12-16 1989-07-13 Hawera Probst Kg Hartmetall Gesteinsbohrer
DE3743364A1 (de) * 1987-12-21 1989-07-06 Fischer Artur Werke Gmbh Bohrer
US5265688A (en) * 1990-04-09 1993-11-30 Hilti Aktiengesellschaft Rock drill
DE4301708C2 (de) * 1993-01-22 2002-10-31 Drebo Werkzeugfab Gmbh Gesteinsbohrer
DE19537900B4 (de) * 1995-10-11 2005-11-03 Irwin Industrial Tool Company (N.D.Ges.D. Staates Delaware), Freeport Drehbohrer
DE19545647A1 (de) * 1995-12-07 1997-06-12 Hilti Ag Drehschlag-Wendelbohrer
DE19545648A1 (de) * 1995-12-07 1997-06-12 Hilti Ag Drehschlag-Wendelbohrer
DE19653155C1 (de) * 1996-12-19 1998-07-09 Drebo Werkzeugfab Gmbh Gesteinsbohrer
DE19807394A1 (de) * 1998-02-21 1999-08-26 Hilti Ag Bohr- und/oder Meisselwerkzeug
DE19916975A1 (de) * 1999-04-15 2000-10-19 Hilti Ag Gesteinsbohrer

Also Published As

Publication number Publication date
EP1083294A1 (de) 2001-03-14
DE50011953D1 (de) 2006-02-02
DK1083294T3 (da) 2006-05-15
JP2001105219A (ja) 2001-04-17
JP4676051B2 (ja) 2011-04-27
DE19942987A1 (de) 2001-03-15
US6431295B1 (en) 2002-08-13

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