EP1083294A1 - Outil de forage - Google Patents

Outil de forage Download PDF

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Publication number
EP1083294A1
EP1083294A1 EP00810787A EP00810787A EP1083294A1 EP 1083294 A1 EP1083294 A1 EP 1083294A1 EP 00810787 A EP00810787 A EP 00810787A EP 00810787 A EP00810787 A EP 00810787A EP 1083294 A1 EP1083294 A1 EP 1083294A1
Authority
EP
European Patent Office
Prior art keywords
drilling tool
groove
section
grooves
head
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
EP00810787A
Other languages
German (de)
English (en)
Other versions
EP1083294B1 (fr
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/fr
Application granted granted Critical
Publication of EP1083294B1 publication Critical patent/EP1083294B1/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
    • E21B10/46—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 are used to drill holes in concrete, masonry, stone and the like used a drill head with cutting edges made of a cutting material, preferably made of a hard metal.
  • the drilling tools are Usually used in hand-held drilling rigs, which in addition to the rotary drive of the Drilling tool also generate axial blows.
  • the axial blows are on the in the Tool holder of the drilling tool inserted shaft end of the drilling tool released and over the shaft and the drill head into the surface to be machined initiated. In this way, the surface is chipped, chiseled and dismantled chip by chip.
  • the drilling tools have the longest possible service life.
  • Drilling tools A number of drilling tools are known from the prior art, which can be found under normal operating conditions due to satisfactory drilling progress distinguish reasonable effort. Even those under normal operating conditions achievable service lives of these known drilling tools are acceptable. Such a thing Drilling tools are described, for example, in US-A-4,903,787.
  • This well known Drilling tool has a shaft with an insertion end for a hand-held one Drill. At the opposite end there is a drill head, the four Has cutting, which is provided on star-shaped carbide inserts are. The cutting edges are separated from each other by head flour grooves, which are divided into two There are discharge grooves for the drilling dust, which spiral around the shaft.
  • the object of the present invention is therefore to overcome these disadvantages of the drilling tools to remedy the state of the art.
  • a drilling tool is to be created at regardless of the diameter of the drill head, even when creating Drilling in reinforced concrete, the risk of the drill head getting caught on Reinforcing iron is reduced.
  • the drilling tool is said to make good drilling progress have little effort and a long service life.
  • the drilling tool created by the invention in particular a rock drill, includes one with an insertion end Shank, the at least two helically circumferential discharge grooves for drilling dust having.
  • the shaft is equipped with a drill head, which has carbide shaped blades that radially surround the circumference of the drill head tower over.
  • the hard metal cutting edges are separated from each other by head flour grooves, whose number is greater than the number of helical discharge grooves in which they flow out.
  • head flour grooves whose number is greater than the number of helical discharge grooves in which they flow out.
  • the spiral groove section Due to the inventive design of the spiral groove section, the two Connected headmeal grooves that open into the same discharge groove, the tendency to Hooking against reinforcement hits counteracted.
  • a drilling tool for example, three cutting edges and three headroom grooves arranged between them open out one of the head meal grooves directly into the associated discharge groove.
  • the so far known generic drilling tools have the problem that Cutting edge, which, based on the direction of rotation, is immediately in front of the directly into the discharge groove leading edge flour groove arranged in the peripheral area in the axial direction Only a little support is experienced by the drill head material because the relatively large width of the spiral groove section a relatively large part of occupies the axial width of the groove.
  • the spiral groove section now has a significantly smaller passage cross-section.
  • the smaller passage cross section of the spiral groove section is expedient achieved in that the core diameter of the shaft remains largely the same the opening width of the spiral groove section is smaller than that at the shaft circumference measured opening width of the common discharge groove.
  • the core diameter relates refer to the shaft diameter at the base of the helical one on the shaft circumferential discharge grooves. Due to the largely constant core diameter a weakening of the head region of the drilling tool is avoided.
  • the drill head has three cutting edges, the circumference of which is radial protrude and are separated from each other by a headmeal groove.
  • the drill head has an even number of Cutting, for example four cutting edges.
  • the cutting edges protrude the circumference of the drill head radially and are separated from one another by head meal grooves. there the head flour grooves each lead in pairs into a common discharge groove.
  • the drill head of the drilling tool is used for an even load largely symmetrical.
  • the passage cross sections of the spiral groove sections at the transition area of each pair of headmeal grooves into the respective common discharge groove are equally large.
  • the drill head in the case of the drilling tool designed according to the invention in the case of an odd one Number of cutting edges that are in axial extension below at least two of the Cutting extending drill head sections on boundary shoulders of the Headmeal grooves or the spiral groove sections end substantially on the same Cross section of the drilling tool, the drill head can be a shorter design have than the previously known generic drilling tools. At a Even number of cutting edges is advantageous for the axial support of all cutting edges about the same length.
  • the spiral groove sections and the head meal grooves have at least partially the same cross-sectional contour.
  • the grooves 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 made of hard metal, which in groove-shaped recesses in the front of the Drill head attached, for example soldered, are.
  • the drill head can be formed entirely from hard metal.
  • the Carbide head is with the shaft end, for example, by friction welding or similar firmly connected.
  • the carbide head has the advantage that it can be used in almost any shape can be produced.
  • the assembly on the shaft is simplified.
  • the drilling tool 1 comprises a shaft 2, one rear end of which is an insertion end for the Has tool holder of a drill. At the opposite end of the Shank 2, the drilling tool 1 is equipped with a drilling head 5, the cutting 6-9 made of hard metal, which protrude axially and radially from the drill head 5.
  • the illustrated drilling tool 1 has an essentially star-shaped, three-jet Center cutting edge 6 and three peripheral cutting edges 7 - 9, which are at an angular distance of about 120 ° are arranged in the peripheral region of the drill head 5 and the drill head 5 protrude radially. Between the peripheral cutting edges 7-9 are essentially axial running head meal grooves 10 - 12 arranged.
  • the first head meal groove 10 lies between the circumferential cutting edges 7 and 8 and runs in the direction of rotation of the drilling tool the arrow R is indicated, the peripheral cutting edge 8 in front.
  • the second head meal groove 11 is located between the peripheral cutting edges 8 and 9 and is assigned to the peripheral cutting edge 9, who precedes it.
  • the third head meal groove 12 lies between the peripheral cutting edges 7 and 9 and is assigned to the peripheral cutting edge 7.
  • the Head meal grooves 10 - 12 can have different widths b. According to that illustrated embodiment, however, they are essentially the same width.
  • the arrows Y, Z, X and W denote different side views of the drilling tool 1, which for further explanation of the invention in the order given in FIGS. 2-5 are shown.
  • the drilling tool is again with the Reference number 1 provided.
  • the same elements have the same reference numerals as in Fig. 1.
  • the spiral groove section 13 opens into on the side facing away from the viewer a discharge groove 4, which rotates helically around the shaft 2 and the common continuation the head flour grooves 10 and 12 forms.
  • 2 is the common discharge groove 4 shown below another discharge groove 3.
  • the two discharge grooves 3, 4 run around the Shaft 2 helical and alternately follow each other in the axial direction.
  • the passage cross sections and the opening widths of the discharge grooves 3, 4 are for example the same size.
  • the common discharge groove has a larger passage cross section and one has a larger opening width than the second discharge groove.
  • the opening width is second discharge groove 3, for example, designated w.
  • the spiral groove section 13 has a smaller passage cross-section than the helical circumferential on the shaft 2 Discharge groove 3.
  • the core diameter remains largely the same Shaft 2
  • the opening width s of the spiral groove section 13 is smaller than an opening width w the discharge groove 3 on the shaft circumference.
  • the spiral groove section 13 is of two shoulders 14, 17 limited. The shoulder 14 closer to the insertion end goes continuously into the shoulder 15 of the common discharge groove 4 over.
  • the different sized opening widths s and c of the spiral groove section 13 and the common discharge groove 4, into which the spiral groove section 13 opens, are in particular in the side view according to arrow X in Fig. 1 can be seen.
  • the cross-section is of the spiral groove portion 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 that has a ratio of about 1/6 to the nominal drill diameter has 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 edge 5 radially protruding are again with the Reference numerals 6-9 denote.
  • the illustration shows the two axial headmeal grooves 10 and 11.
  • the circumferential cutting edge 8 associated head meal groove 10 opens into the Spiral groove section 13, which merges into the common discharge groove 4.
  • the for Circumferential cutting edge 9 belonging to the head meal groove 11 opens onto the viewer opposite side in the second discharge groove 3.
  • the opening widths c and w of the two Helical circumferential discharge grooves 4, 3 essentially have the same size. From Fig. 4 it can be seen that as a result of the Formation of the spiral groove section 13 which is axially below the circumferential cutting edges 7- 9 extending drill head sections end in shoulders 17-19, all approximately on the Height of the same cross section of the drilling tool 1.
  • FIG. 5 finally shows the drilling tool from the view according to arrow W in FIG. 1.
  • this side view shows the course of the head meal groove 11, which the Circumferential cutting edge 9 is assigned and ends alone and directly in 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.
  • Tungsten carbide cutting is also provided on a star-shaped, three-jet insert be attached to the front of the shaft.
  • the cutting edges extend sloping axially, from a point in the center to the circumference of the drill head, which it radial tower over.
  • the head meal grooves are arranged between the three cutting edges. At three head meal grooves open two head meal grooves in a spiral groove section.
  • the third Headmeal groove opens into the second discharge groove on the shaft in a spiral shape. It But four hard metal cutting edges can also be provided.
  • the drill head can be made entirely of hard metal and connected to the shank, for example welded.
  • the one-piece design of the drill head offers the Advantage of a simple, almost any shape 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 Outil de forage Expired - Lifetime EP1083294B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=7921281

Family Applications (1)

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

Country Status (5)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1188897A1 (fr) * 2000-09-15 2002-03-20 DreBo Werkzeugfabrik GmbH Trépan de forage de roche
EP1217165A1 (fr) * 2000-12-22 2002-06-26 DreBo Werkzeugfabrik GmbH Foret à roche
AT15436U3 (de) * 2015-07-27 2018-10-15 Johann Eberhard Gmbh Eisbohrer

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR0109142B1 (pt) * 2000-03-10 2009-01-13 broca.
DE10024433A1 (de) * 2000-05-19 2001-11-29 Hawera Probst Gmbh Gesteinsbohrer
DE10053344A1 (de) * 2000-10-27 2002-05-08 Hilti Ag 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 (fr) * 2007-02-14 2008-08-21 Sandvik Intellectual Property Ab Trépan et appareil de forage unique
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 (fr) 2012-05-29 2015-11-04 Black & Decker Inc. Tête de coupe pour un foret.
DE102013106614A1 (de) * 2013-06-25 2015-01-08 Heller Tools Gmbh Gesteinsbohrer

Citations (6)

* 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
US4903787A (en) 1987-12-16 1990-02-27 Hawera Probst Gmbh & Co. Rock drill
EP0607958A1 (fr) * 1993-01-22 1994-07-27 DreBo Werkzeugfabrik GmbH Trépan de roche
DE19537900A1 (de) * 1995-10-11 1997-04-17 American Tool Co Drehbohrer
EP0778391A2 (fr) * 1995-12-07 1997-06-11 HILTI Aktiengesellschaft Perceuse rotative hélicoidale à percussion
DE19653155C1 (de) * 1996-12-19 1998-07-09 Drebo Werkzeugfab Gmbh Gesteinsbohrer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62130808U (fr) * 1986-02-07 1987-08-18
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
DE19545647A1 (de) * 1995-12-07 1997-06-12 Hilti Ag Drehschlag-Wendelbohrer
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

Patent Citations (6)

* 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
US4903787A (en) 1987-12-16 1990-02-27 Hawera Probst Gmbh & Co. Rock drill
EP0607958A1 (fr) * 1993-01-22 1994-07-27 DreBo Werkzeugfabrik GmbH Trépan de roche
DE19537900A1 (de) * 1995-10-11 1997-04-17 American Tool Co Drehbohrer
EP0778391A2 (fr) * 1995-12-07 1997-06-11 HILTI Aktiengesellschaft Perceuse rotative hélicoidale à percussion
DE19653155C1 (de) * 1996-12-19 1998-07-09 Drebo Werkzeugfab Gmbh Gesteinsbohrer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1188897A1 (fr) * 2000-09-15 2002-03-20 DreBo Werkzeugfabrik GmbH Trépan de forage de roche
EP1217165A1 (fr) * 2000-12-22 2002-06-26 DreBo Werkzeugfabrik GmbH Foret à roche
AT15436U3 (de) * 2015-07-27 2018-10-15 Johann Eberhard Gmbh Eisbohrer

Also Published As

Publication number Publication date
DK1083294T3 (da) 2006-05-15
JP4676051B2 (ja) 2011-04-27
DE19942987A1 (de) 2001-03-15
EP1083294B1 (fr) 2005-12-28
DE50011953D1 (de) 2006-02-02
US6431295B1 (en) 2002-08-13
JP2001105219A (ja) 2001-04-17

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