EP0654580A2 - Foret héliocoidal - Google Patents

Foret héliocoidal Download PDF

Info

Publication number
EP0654580A2
EP0654580A2 EP94810562A EP94810562A EP0654580A2 EP 0654580 A2 EP0654580 A2 EP 0654580A2 EP 94810562 A EP94810562 A EP 94810562A EP 94810562 A EP94810562 A EP 94810562A EP 0654580 A2 EP0654580 A2 EP 0654580A2
Authority
EP
European Patent Office
Prior art keywords
drill
drill head
rock
head
face
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
EP94810562A
Other languages
German (de)
English (en)
Other versions
EP0654580A3 (fr
EP0654580B1 (fr
Inventor
Axel Neukirchen
Rainer Batliner
Maximilian Stöck
Ralf Baumann
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 EP0654580A2 publication Critical patent/EP0654580A2/fr
Publication of EP0654580A3 publication Critical patent/EP0654580A3/fr
Application granted granted Critical
Publication of EP0654580B1 publication Critical patent/EP0654580B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • E21B10/44—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 rock drill with a drill head consisting entirely of hard metal, which is connected to a flute having a drill shank.
  • rock drills wear extremely quickly in the area of the drill tip when drilling in hard rock and at high rotational speeds. For this reason, rock drills are equipped with hard metal, whereby hard metal in the present case means sintered or melted carbides, silicides, borides or their alloys.
  • Such a rock drill is known from DE-AS 20 08 825.
  • This rock drill has an elliptical drill head made entirely of hard metal and soldered to the drill shank, which additionally interacts with a mortise with the drill shank.
  • the tenoning is formed by a peg-shaped extension of the drill head, which is soldered into a bore in the drill shank that is appropriately dimensioned in diameter and depth.
  • This known rock drill has the property that the continuous removal of the drill material takes place over the space formed between the smallest diameter of the elliptical drill head and the inner wall of the borehole. Each of these two gaps becomes smaller as it approaches the largest diameter of the drill head. Drilled material, which is transported through these gaps during the machining process, can jam in two diagonally opposite, narrowing gaps, so that premature wear or damage to the drill head occurs in the circumferential area of the largest diameter. In addition to the premature mechanical wear of the drill head causes between the peripheral area Drill head and the borehole wall jammed an enlargement of the borehole to be produced and a rough borehole wall.
  • the invention has for its object to provide a rock drill with a hard metal drill head, which is characterized by high drilling performance, long service life and good drilling material removal.
  • this is achieved in that the cross section of the drill head lying between the end face connected to the drill shaft and the free end face from the remaining cross section between two substantially circular section-like, diametrically opposed and extending along the drill axis in the longitudinal direction of the drill head, which serve to pass the drill material is formed, wherein the projections of the recesses viewed in the axial direction coincide with that region of the flutes that adjoin the end face connected to the drill shank and wherein a main cutting edge runs essentially roof-shaped and along one of the diagonals of the cross section.
  • the cross section of the drill head which is perpendicular to the drill axis, is essentially rectangular.
  • the main cutting edge extends along a diagonal of the rectangular cross section. This main cutting edge runs on the end face of the drill head in such a way that when viewed in the circumferential direction of the drill head, the cutting edge of the main cutting edge is closer to one of the recesses than the corresponding free surface of the main cutting edge to a further recess.
  • the area of the drill head that faces away from the cutting edge and faces the free surface serves to support the main cutting edge during a machining process.
  • the production or comminution of drillings can additionally be improved in that drillings removed by the main cutting edge are comminuted with the aid of further additional cutting edges.
  • the drill head preferably has at least two additional cutting edges, which are arranged essentially parallel to the further diagonal.
  • the drill material removed from the main cutting edge is thrown into the peripheral area of the drill head.
  • the additional cutting edges are advantageously arranged rotationally symmetrically in the outer end area of the drill head. Due to the rotationally symmetrical arrangement of the additional cutting edges, the necessary, smooth running of the rock drill is also achieved.
  • the main cutting edge In addition to the main removal of the drilling material, the main cutting edge also serves to center the rock drill during the machining process.
  • the main cutting edge is roof-shaped, with the apex forming that area of the drill head which, viewed in the longitudinal direction of the rock drill, has the greatest distance from the drill shank.
  • the additional cutting edges can also serve to remove drilling material in addition to crushing the drilling material removed from the main cutting edge. It is therefore expedient if the main cutting edge and the additional cutting edges lie essentially on the same envelope curve. If only the cutting of the drill material is required of the additional cutting edges, the additional cutting edges can be set back in relation to the envelope curve formed by the main cutting edge.
  • the good removal of drilling material is essentially dependent on the diameter of the drill head, ie the larger the diameter of the drill head, the smaller the recesses can be.
  • the cross-sectional area of the recesses is preferably 0.6 to 0.9 times the cross-section of the drilling head.
  • the drill head is connected to the drill shank by welding or soldering with the interposition of a solder.
  • the end face of the drill head opposite the main cutting edge is expediently designed to be flat. This makes the soldering process easier, in particular, since the liquid solder can be distributed evenly on the horizontally aligned flat end.
  • solder seam that is subjected to tensile and compressive stress perpendicular to the direction of the solder seam fails brittle.
  • stress caused by shear leads to elastic and plastic behavior of the solder seam.
  • an elastic and plastic behavior of the solder seam is sought.
  • the solder seam plane is essentially oblique to the longitudinal axis of the rock drill. So that solder seam planes running essentially at an angle to the longitudinal axis of the rock drill can be produced, the end face of the drill head connected to the drill shank has a recess which interacts with a correspondingly designed end face of the drill shank and has at least two surface lines. The surface lines start from the mouth area of the depression and taper to a common center lying on the longitudinal axis of the drill head.
  • the depression of the drill head is preferably conical, roof-shaped or dome-shaped.
  • a roof-shaped depression has two surface lines, which taper from the mouth area to a common center lying on the longitudinal axis of the drill head.
  • Conical or dome-shaped depressions have a large number of surface lines on their circumference, which taper from the mouth area to a common center lying on the longitudinal axis of the drill head.
  • the end face of the drill head used for connection to the drill shank can advantageously have rotary driving surfaces.
  • Such rotary driving surfaces can be formed, for example, by grooves that extend at least partially over the diameter of the drill head or centrally arranged, longitudinally extending depressions with a polygonal cross section.
  • a rock drill which consists essentially of a flute 11 having drill shank 1 and a drill head 2.
  • the drill shank 1 is composed of an insertion end 9a and a feed spiral 9b.
  • the cross section of the drilling head 2 is essentially rectangular, a main cutting edge 4 being arranged on a diagonal D1.
  • the largest outside diameter of the drill head 2 is larger than the outside diameter of the drill shaft 1.
  • the main cutting edge 4 is roof-shaped and the apex S1 of the main cutting edge 4 is the area which is the farthest axially from the drill shank 1.
  • the main cutting edge 4 has a cutting edge 4a and a free surface 4b, the cutting edge 4a of the main cutting edge 4 being closer to one of the recesses 3a when viewed in the peripheral region of the drilling head 2 than the corresponding free surface 4b of the main cutting edge 4 of a further recess 3b.
  • the rectangular cross section of the drill head 2 has a further diagonal D2, along which at least some additional cutting edges 5, 6 are arranged, which are also roof-shaped and extend from the outer circumference of the drill head 2 towards the center of the drill head 2.
  • FIG 3 shows the distance A between the main cutting edge 4 and the additional cutting edges 5, 6, which are set back with respect to the envelope curve formed by the main cutting edge 4 are arranged.
  • the outside diameter of the main cutting edge 4 is larger than the outside diameter of the additional cutting edges 5, 6.
  • FIG. 4 shows the drill head 2, which has a main cutting edge 4 and two additional cutting edges 5, an additional cutting edge not being visible.
  • the main cutting edge 4 is roof-shaped and has an apex S1.
  • the end face 10 of the drill head 2 is provided with a recess 8 which extends at right angles to the longitudinal axis of the drill head 2.
  • the depression 8 has a rectangular cross-sectional area and rotary driving surfaces 7.
  • the drilling head 12 shown in FIG. 5 has a main cutting edge 14 and two additional cutting edges 15, an additional cutting edge not being visible.
  • the main cutting edge 14 is roof-shaped and has an apex S2.
  • the end face 16 of the drill head 12 which can be connected to a drill shank (not shown) has a roof-shaped depression 17.
  • FIG. 6 shows a drilling head 22 which has a main cutting edge 24 and two additional cutting edges 25, an additional cutting edge not being visible.
  • the main cutting edge 24 is roof-shaped and has an apex S3.
  • the end face 28 of the illustrated drill head 22 has a recess 27 which is dome-shaped.
  • the drill head 32 shown in FIG. 7 has a main cutting edge 34 and two additional cutting edges 35, an additional cutting edge not being visible.
  • the main cutting edge 34 is roof-shaped and has an apex S4.
  • the end face of the drill head 32 shown in FIG. 7 is designed in the form of a flat surface 37.
  • the connection of the drill head 32 to the drill shank can take place by welding or soldering.
  • the drill head 32 which for example mainly consists of cobalt powder and tungsten carbide, can be provided in the region of the end face 37 with a layer 38 containing only cobalt powder, which leads to an improvement in the welded or soldered connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)
EP94810562A 1993-11-18 1994-09-27 Foret héliocoidal Expired - Lifetime EP0654580B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4339245A DE4339245A1 (de) 1993-11-18 1993-11-18 Spiralbohrer
DE4339245 1993-11-18

Publications (3)

Publication Number Publication Date
EP0654580A2 true EP0654580A2 (fr) 1995-05-24
EP0654580A3 EP0654580A3 (fr) 1995-11-02
EP0654580B1 EP0654580B1 (fr) 1997-08-20

Family

ID=6502805

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94810562A Expired - Lifetime EP0654580B1 (fr) 1993-11-18 1994-09-27 Foret héliocoidal

Country Status (7)

Country Link
US (1) US5492187A (fr)
EP (1) EP0654580B1 (fr)
JP (1) JP3441819B2 (fr)
KR (1) KR100313617B1 (fr)
CN (1) CN1044023C (fr)
DE (2) DE4339245A1 (fr)
DK (1) DK0654580T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884448A2 (fr) 1997-06-10 1998-12-16 HILTI Aktiengesellschaft Trépan de roche avec rainures d'évacuation hélicoidales
US7137461B2 (en) 2002-10-03 2006-11-21 Black & Decker, Inc. Masonry drilling tool
DE102006020538A1 (de) * 2006-05-03 2007-11-15 Irwin Industrial Tools Gmbh Bohrkopf für Bohrwerkzeug und Bohrwerkzeug
EP3150347A1 (fr) * 2015-09-30 2017-04-05 DreBo Werkzeugfabrik GmbH Foret

Families Citing this family (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2318072A (en) * 1996-09-21 1998-04-15 Plansee Tizit Gmbh Masonry bit
DE19650487A1 (de) * 1996-12-05 1998-06-10 Hilti Ag Bohrwerkzeug
DE19703994B4 (de) * 1997-02-03 2006-04-20 Drebo Werkzeugfabrik Gmbh Bohrer
DE19709771B4 (de) * 1997-03-10 2008-03-20 Drebo Werkzeugfabrik Gmbh Gesteinsbohrer
DE19810192A1 (de) * 1998-03-10 1999-09-16 Hilti Ag Bohrwerkzeug
US6039127A (en) * 1998-03-13 2000-03-21 Loudon Enterprises, Inc. Rock drill
DE29901285U1 (de) * 1999-01-26 1999-06-17 Plica Werkzeugfabrik Ag, Mollis Bohrwerkzeug
US6374931B1 (en) * 1999-11-03 2002-04-23 Relton Corporation Multiple cutter rotary hammer bit
DE10009732A1 (de) 2000-03-02 2001-09-06 Hawera Probst Gmbh Gesteinsbohrer
SE519575C2 (sv) * 2000-04-11 2003-03-18 Sandvik Ab Borrdkär för metallborrning
DE10024433A1 (de) * 2000-05-19 2001-11-29 Hawera Probst Gmbh Gesteinsbohrer
DE10053344A1 (de) * 2000-10-27 2002-05-08 Hilti Ag Gesteinsbohrer
DE10117262A1 (de) * 2001-01-17 2002-07-18 Hilti Ag Gesteinsbohrer
DE20102914U1 (de) 2001-02-19 2001-05-03 Berner GmbH, 74653 Künzelsau Bohrer mit Bohrkopf aus Hartmetall
JP4189380B2 (ja) * 2002-06-06 2008-12-03 株式会社ミヤナガ ドリルビット
RU2283224C2 (ru) * 2002-06-06 2006-09-10 Кабусики Кайся Миянага Сверло
DE10334610B4 (de) * 2003-07-29 2006-04-20 Hilti Ag Bohrkopf
USD525272S1 (en) * 2003-12-24 2006-07-18 Robert Bosch Gmbh Rotary impact drill bit
DE102004047469A1 (de) * 2004-09-30 2006-04-06 Robert Bosch Gmbh Bohrwerkzeug mit einem als Platte oder Kopf ausgebildeten Schneidelement
DE602006016587D1 (de) * 2005-04-28 2010-10-14 Irwin Ind Tool Company As Bohrwerkzeug
DE102006000251A1 (de) * 2006-05-30 2007-12-06 Hilti Ag Hartstoffkopf und Drehschlagbohrer
JP2008062620A (ja) * 2006-09-11 2008-03-21 Miyanaga:Kk ドリルビット
EP2093301B1 (fr) 2006-11-20 2019-03-20 Kabushiki Kaisha Miyanaga Pointe superdure et son procédé de fabrication
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
CN101400198B (zh) 2007-09-28 2010-09-29 北京富纳特创新科技有限公司 面热光源,其制备方法及应用其加热物体的方法
CN101409962B (zh) 2007-10-10 2010-11-10 清华大学 面热光源及其制备方法
DE102007000848A1 (de) * 2007-10-11 2009-04-23 Hilti Aktiengesellschaft Selbstbohrschraube
DE102007000534A1 (de) * 2007-10-19 2009-04-23 Hilti Aktiengesellschaft Schlagbohrwerkzeug
US7740088B1 (en) * 2007-10-30 2010-06-22 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Ultrasonic rotary-hammer drill
US8070397B2 (en) * 2008-02-19 2011-12-06 Irwin Industrial Tool Company Self feed bit
US7861807B2 (en) 2008-12-03 2011-01-04 Black & Decker Inc. Drill bit including one piece cutting head
DE102009003288A1 (de) * 2009-05-20 2010-11-25 Hilti Aktiengesellschaft Bohrer
US20100307640A1 (en) * 2009-06-03 2010-12-09 Durfee La Verne R Cutting edge and cutting tool
DE102009028020B4 (de) * 2009-07-27 2011-07-28 Hilti Aktiengesellschaft Bohrer und Herstellungsverfahren
US8979445B2 (en) * 2010-10-15 2015-03-17 Hanita Metal Factory Ltd Cutting tip and rotary cutting tool employing same
AU343839S (en) * 2012-01-25 2012-08-13 Heller Tools Gmbh Masonry drill bit
DE102012015372A1 (de) 2012-08-03 2014-02-06 Irwin Industrial Tool Co. Bohrkopf für einen Bohrer und Bohrer
DE102012015371A1 (de) 2012-08-03 2014-02-06 Irwin Industrial Tool Co. Bohrkopf für einen Bohrer und Bohrer
US9695640B2 (en) 2012-08-03 2017-07-04 Irwin Industrial Tool Company Drill head for a drill and drill
CN103600334B (zh) * 2013-12-04 2016-06-22 湖南科技大学 等波阻钻头
CN104070200A (zh) * 2014-06-27 2014-10-01 唐英 一种钻床
US10507534B2 (en) 2016-03-17 2019-12-17 O-Tags, Inc. Systems, methods, and apparatus for reliably installing survey tags
US10532412B2 (en) 2016-09-23 2020-01-14 Milwaukee Electric Tool Corporation Hole saw arbor assembly
US10730119B2 (en) 2017-01-06 2020-08-04 Milwaukee Electric Tool Corporation Hole saw
USD973733S1 (en) 2017-08-15 2022-12-27 Milwaukee Electric Tool Corporation Hole saw
CN117259830A (zh) * 2023-11-07 2023-12-22 嘉兴沃尔德金刚石工具有限公司 一种高精密微型钻头

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884448A2 (fr) 1997-06-10 1998-12-16 HILTI Aktiengesellschaft Trépan de roche avec rainures d'évacuation hélicoidales
EP0884448A3 (fr) * 1997-06-10 2002-03-27 HILTI Aktiengesellschaft Trépan de roche avec rainures d'évacuation hélicoidales
US7137461B2 (en) 2002-10-03 2006-11-21 Black & Decker, Inc. Masonry drilling tool
DE102006020538A1 (de) * 2006-05-03 2007-11-15 Irwin Industrial Tools Gmbh Bohrkopf für Bohrwerkzeug und Bohrwerkzeug
EP3150347A1 (fr) * 2015-09-30 2017-04-05 DreBo Werkzeugfabrik GmbH Foret

Also Published As

Publication number Publication date
EP0654580A3 (fr) 1995-11-02
DK0654580T3 (da) 1998-04-06
DE59403784D1 (de) 1997-09-25
US5492187A (en) 1996-02-20
DE4339245A1 (de) 1995-05-24
KR950013670A (ko) 1995-06-15
CN1044023C (zh) 1999-07-07
JP3441819B2 (ja) 2003-09-02
EP0654580B1 (fr) 1997-08-20
JPH07180463A (ja) 1995-07-18
KR100313617B1 (ko) 2002-11-22
CN1107409A (zh) 1995-08-30

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