EP0884448A2 - Trépan de roche avec rainures d'évacuation hélicoidales - Google Patents

Trépan de roche avec rainures d'évacuation hélicoidales Download PDF

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Publication number
EP0884448A2
EP0884448A2 EP98810413A EP98810413A EP0884448A2 EP 0884448 A2 EP0884448 A2 EP 0884448A2 EP 98810413 A EP98810413 A EP 98810413A EP 98810413 A EP98810413 A EP 98810413A EP 0884448 A2 EP0884448 A2 EP 0884448A2
Authority
EP
European Patent Office
Prior art keywords
cutting edge
drill
main cutting
rock drill
cutting edges
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
EP98810413A
Other languages
German (de)
English (en)
Other versions
EP0884448B1 (fr
EP0884448A3 (fr
Inventor
Udo Hauptmann
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 EP0884448A2 publication Critical patent/EP0884448A2/fr
Publication of EP0884448A3 publication Critical patent/EP0884448A3/fr
Application granted granted Critical
Publication of EP0884448B1 publication Critical patent/EP0884448B1/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
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58—Chisel-type inserts

Definitions

  • the invention relates to a rock drill according to the preamble of Claim 1.
  • Rock drills are used in conjunction with axial impact-supported rotary drilling rigs used and usually for the rotary impact drilling or Breakthroughs used in concrete or masonry. It is known that Rock drill in the area of the drill tip when drilling in hard rock and at wear very quickly at high speeds. That is why rock drills are included Tungsten carbide, sintered or in the present case under carbide molten carbides, silicides, borides or their alloys are understood.
  • Such a rock drill is known from EP-A-0 654 580.
  • This Rock drill has a drill head made entirely of hard metal, which also connected to the drill shaft, for example soldered or welded.
  • Of the Cross section of the drill head is substantially rectangular, with each the diagonal cutting are arranged.
  • the cutting edges serve to remove rock and provide the lateral guidance of the rock drill in the hole. They sit down together from one main cutting edge, which extends over a diagonal, and two Additional cutting edges that are parallel to one that is inclined with respect to the first diagonal another diagonal are arranged.
  • the cutting edges are arranged so that the Main cutting edge and the additional cutting edges when turning the rock drill Describe the same envelope.
  • the roof-shaped main cutting edge fulfills that Task to center the rock drill and get the main one Material removal by engaging the one to be machined before the additional cutting edges Rock is coming.
  • the drilling material removed from the main cutting edge is fed into the Circumferential area of the drill head thrown and from the arranged there additional cutting edges axially set back compared to the main cutting edge.
  • This well-known rock drill is already characterized by a high drilling capacity, long service life and good drilling material removal.
  • the requirement are created to suit the cutting edge in terms of their specific stress to be able to optimize.
  • the central part of the main cutting edge subject to other loads due to the axial impacts of the rotary impact drill is as the peripheral areas of the main cutting edge or the additional cutting edges on which primarily shear forces occur.
  • the object of the present invention is therefore to modify a rock drill of the generic type in such a way that the different stresses on the cutting bill occurring during operation will be carried.
  • the performance of the drilling tool is said to be further improved and a very good removal of the drilling material can be guaranteed.
  • rock drill the features stated in the characterizing section of claim 1.
  • rock drill created by the invention has a drill shank at least one discharge groove running helically along its longitudinal extent for removed drilling material and a drilling head made entirely of hard metal on.
  • the drill head is connected to the front end of the drill shaft, for example welded or soldered, and has a main cutting edge and at least one Additional cutting edge, which are each arranged along diagonals of the drill head. The additional cutting edge projects axially beyond the peripheral area of the main cutting edge.
  • the additional cutting edge takes over the main material removal.
  • the inventive arrangement of the at least one additional cutting edge the greatest shear stress when drilling a hole.
  • the opposite the at least one additional cutting edge axially recessed peripheral areas of the Main cutting edges only fulfill a centering function. This allows the Main cutting edge optimized with regard to its centering function, for example be reinforced. The centering function of the main cutting edge is retained, even if the additional cutting edge a certain amount of wear over the service life of the rock drill is subject.
  • the additional cutting edge extends only over part of the radial running diagonal of the drill head; thereby the stress is caused by Shear forces kept within limits.
  • the axial impact energy is only over the as Main cutting edge acting main cutting edge or, subsequently, over the additional cutting edge initiated into the underground. Compared to the well-known rock drill, this is the effectiveness of the impact energy introduction into the underground is further increased by the pressure on the material to be mined is increased.
  • At the transition from the Main cutting edge relative to the axially opposite to the peripheral areas of the main cutting edge protruding additional cutting edge is an additional one when drilling underground Shear stress built up that supports drilling progress.
  • the at least one additional cutting edge preferably projects beyond the peripheral regions of the Main cutting edge also in the radial direction. This will take the peripheral areas of the Main cutting edge no longer part of the material degradation from the bore wall and meet just a management function for the rock drill.
  • the diagonal of the additional cutting edges also includes the diagonal of the main cutting edge at an angle> 90 °.
  • the main cutting edge advantageously has a roof shape trending central area.
  • the roof-shaped central area dominates the Additional cutting axially and has a radial extension that is less than or equal to 1/3 of the largest radial diameter of the drill head.
  • the central area of the main cutting edge is in terms of the transmission of the axial blows of the rotary impact drill optimized. Due to its roof-shaped contour and the chosen it only offers one radial extension when penetrating into the subsurface relatively small area of attack for the shear forces. This improves the service life the main cutting edge and the drill head.
  • the additional cutting edges advantageously have a radial length that is more than 2/3 of the largest radial diameter of the drill head. This is a good one Dismantling performance guaranteed and can in operation on the additional blades acting shear forces are kept low.
  • the Additional cutting have a radially extending cutting edge that is aligned with the axis of the Drill shank includes an angle of approximately 90 °. In particular, this is a particularly good milling effect of the cutting edges of the additional cutting edges achieved.
  • the additional cutting edges can be related to the direction of rotation during operation of the Rock drill ahead of the peripheral areas of the main cutting edge or hurry up.
  • the Run additional cutting edges ahead of the main cutting edge Particularly good ones Conditions arise when the additional cutting edges each have main discharge grooves are allocated for drilling dust.
  • the mere guiding function of the main cutting edge is further emphasized when the main cutting edge on both sides of the central area has a radial extension has an angle of about 90 ° with the axis of the drill shaft.
  • the axially protruding central area of the Main cutting edge centering the drill.
  • the peripheral areas of the main cutting edge are no longer involved in material degradation.
  • the leadership function of the peripheral areas of the main cutting edge thus continues improved that their end faces running parallel to the shaft axis have a curvature have, which is adapted to the curvature of the drill shaft. If that about the Peripheral areas of the main cutting edge protruding in contact with get into the hole wall, they only slide due to their curved shape along the borehole wall and make practically no contribution to the abrasive Material degradation. This reduces the friction of the drilling tool in the borehole.
  • the rock drill 1 shown in FIGS. 1-3 has a drill shank 2 which along its longitudinal extent with discharge grooves 3 for when drilling a hole removed drill material is equipped.
  • the discharge grooves 3 are helical on Drill shaft 2 arranged.
  • the drill shaft 2 has a Inserting end 4 for the tool holder of a rotary impact drill, not shown on.
  • these devices can be powerful Actor's hammer drill rigs.
  • the drill shaft 2 At its end 4 the opposite front end is the drill shaft 2 with a drill head 5 fitted.
  • the drill head 5 consists of hard metal, with hard metal in in the present case sintered or melted carbides, silicides, borides or their Alloys are understood.
  • the drill head 5 is with the drill shaft 2 connected for example by soldering or welding.
  • the drill head 5 has a main cutting edge 6 and two additional cutting edges 7, 8 which are each arranged on diagonals D1, D2 of the drill head 5.
  • the diagonals D1, D2, on which the cutting edges 6, 7, 8 are arranged, are inclined towards one another and form an angle ⁇ with each other that is smaller than 90 °.
  • the angle ⁇ is approximately 10 ° to 50 °.
  • the main cutting edge is 6 shaped like a roof and consists of a central area 9 and peripheral areas 10, 11 on both sides of the central region 9 together.
  • the central area 9 of the Main cutting edge 6 projects beyond the additional cutting edges 7, 8 in the axial direction and serves in Operation as centering point.
  • the central area 9 has a parallel to the Diameter D1 of the drill head 5 measured radial extension I, which is smaller or is equal to one third of the largest radial diameter of the drill head 5.
  • the additional cutting edges 7, 8 extend only over part of the diameter of the Drill head and have a radial length s, which is more than 2/3 of the largest radial Diameter of the drill head 5 is.
  • the additional cutting edges 7, 8 protrude beyond peripheral areas 10, 11 of the main cutting edge 6 at least in the axial direction. With They advantageously protrude beyond the peripheral areas 10, 11 of the main cutting edge 6, as in FIG. 3 shown, also in the radial direction.
  • the additional cutting edges 7, 8 each have one radially extending cutting edge 12, 13, one with the axis of the drill shaft 2 Includes an angle of approximately 90 °.
  • each essentially axial extending grooves 14, 15 provided in the discharge groove (s) 3 for the drilling dust flow and support the removal of the drilling dust.
  • concave or V-shaped recesses 16, 17 are provided, which as Main discharge grooves for the drilling dust and serve in the helical discharge grooves 3 am Drill shaft 2 open.
  • the additional blades 7, 8 hurry the peripheral areas 10, 11 of the Main cutting edge 6 ahead.
  • the concave or V-shaped main discharge grooves 16, 17 in each case the additional cutting edges responsible for the main material removal 7, 8 assigned.
  • the peripheral areas 10, 11 of the main cutting edge 6 serve the Guiding the rock drill 1 in the hole.
  • the axial End faces 18, 19 of the peripheral regions 10, 11 are curved. Here their curvature corresponds approximately to the curvature of the drill shaft 2.
  • the second exemplary embodiment of a drill head 50 shown in FIG. 4 The rock drill according to the invention largely corresponds to the drill head 5 according to Fig. 1-3.
  • the difference is that the peripheral areas 51, 52 a have radial extension that is at an angle of with the axis of the drill shaft includes about 90 °.
  • the mere leadership function of the peripheral Areas 51, 52 of the main cutting edge 60 are further underlined.

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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
EP98810413A 1997-06-10 1998-05-07 Trépan de roche avec rainures d'évacuation hélicoidales Expired - Lifetime EP0884448B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19724373 1997-06-10
DE19724373A DE19724373A1 (de) 1997-06-10 1997-06-10 Gesteinsbohrer

Publications (3)

Publication Number Publication Date
EP0884448A2 true EP0884448A2 (fr) 1998-12-16
EP0884448A3 EP0884448A3 (fr) 2002-03-27
EP0884448B1 EP0884448B1 (fr) 2004-12-08

Family

ID=7832000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810413A Expired - Lifetime EP0884448B1 (fr) 1997-06-10 1998-05-07 Trépan de roche avec rainures d'évacuation hélicoidales

Country Status (5)

Country Link
US (1) US6129162A (fr)
EP (1) EP0884448B1 (fr)
JP (1) JP4046851B2 (fr)
DE (2) DE19724373A1 (fr)
DK (1) DK0884448T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1083295A1 (fr) * 1999-09-09 2001-03-14 HILTI Aktiengesellschaft Outil de forage
EP1125663A2 (fr) * 2000-02-16 2001-08-22 HILTI Aktiengesellschaft Outil de forage pour la pierre
EP1125664A2 (fr) * 2000-02-16 2001-08-22 HILTI Aktiengesellschaft Outil de forage pour pierre
EP1852202A1 (fr) * 2006-05-03 2007-11-07 Irwin Industrial Tools GmbH Tête de forage pour un outil de forage et outil de forage
AT13738U1 (de) * 2013-03-05 2014-07-15 Dywidag Systems Int Gmbh Bohrkrone
EP3336302A1 (fr) * 2016-12-16 2018-06-20 HILTI Aktiengesellschaft Foret

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19916975A1 (de) * 1999-04-15 2000-10-19 Hilti Ag Gesteinsbohrer
DE19964272C2 (de) * 1999-09-16 2003-05-28 Heller Dinklage Gmbh Geb Bohrer, insbesondere Gesteinsbohrer
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
DE10024433A1 (de) * 2000-05-19 2001-11-29 Hawera Probst Gmbh Gesteinsbohrer
DE10117262A1 (de) * 2001-01-17 2002-07-18 Hilti Ag Gesteinsbohrer
GB2393681A (en) * 2002-10-03 2004-04-07 Black & Decker Inc Masonry drilling tool
US6996247B2 (en) * 2002-11-05 2006-02-07 Step Technologies, Inc. Push-push multiple magnetic air gap transducer
EP1431511B1 (fr) 2002-12-19 2006-08-30 Robert Bosch Gmbh Foret à roche
US7540696B1 (en) * 2004-01-15 2009-06-02 Century Tool & Design, Inc. Spot drilling insert
DE102004028099A1 (de) * 2004-06-09 2005-12-29 Hilti Ag Bohrer
WO2006114306A1 (fr) * 2005-04-28 2006-11-02 Irwin Industrial Tool Company A/S Outil de perçage
DE102006000221A1 (de) * 2006-05-10 2007-11-15 Hilti Ag Hartstoffbohrkopf
JP2008062620A (ja) * 2006-09-11 2008-03-21 Miyanaga:Kk ドリルビット
DE102006035443B3 (de) * 2006-11-15 2008-02-21 Hilti Ag Bohrwerkzeug mit Hartstoffkopf
US20100003094A1 (en) * 2007-01-09 2010-01-07 Irwin Industrial Tool Company Drill bit
US20080166194A1 (en) * 2007-01-09 2008-07-10 Durfee Laverne R Drill bit
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
DE102008043999A1 (de) * 2008-11-24 2010-05-27 Robert Bosch Gmbh Bohrwerkzeug insbesondere für Bohr- und/oder Meißelgeräte
US7861807B2 (en) 2008-12-03 2011-01-04 Black & Decker Inc. Drill bit including one piece cutting head
DE102008054869B4 (de) * 2008-12-18 2010-09-02 Hilti Aktiengesellschaft Bohrkopf für Gesteinsbohrer
US20100307640A1 (en) * 2009-06-03 2010-12-09 Durfee La Verne R Cutting edge and cutting tool
CN104251121A (zh) * 2014-09-18 2014-12-31 武汉地大长江钻头有限公司 适用于石油勘探井可形成粗颗粒岩屑的pdc钻头
DE102015220634A1 (de) * 2015-10-22 2017-06-29 Robert Bosch Gmbh Bohrwerkzeug

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0654580A2 (fr) 1993-11-18 1995-05-24 HILTI Aktiengesellschaft Foret héliocoidal

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3707798A1 (de) * 1987-03-11 1988-09-22 Hawera Probst Kg Hartmetall Gesteinsbohrer
DE3820695C2 (de) * 1988-06-18 1996-07-25 Hawera Probst Kg Hartmetall Gesteinsbohrer
DE4301708C2 (de) * 1993-01-22 2002-10-31 Drebo Werkzeugfab Gmbh Gesteinsbohrer
DE4306981A1 (de) * 1993-03-05 1994-09-08 Keil Werkzeugfabrik Karl Eisch Bohrer für Gestein oder dergleichen
DE4407119A1 (de) * 1993-12-11 1995-06-14 Hawera Probst Kg Hartmetall Gesteinsbohrer
DE19545647A1 (de) * 1995-12-07 1997-06-12 Hilti Ag Drehschlag-Wendelbohrer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0654580A2 (fr) 1993-11-18 1995-05-24 HILTI Aktiengesellschaft Foret héliocoidal

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1083295A1 (fr) * 1999-09-09 2001-03-14 HILTI Aktiengesellschaft Outil de forage
US6450273B1 (en) 1999-09-09 2002-09-17 Hilti Aktiengesellschaft Drilling tool including drilling head with multiple cutting members separated drilled material grooves
EP1125663A2 (fr) * 2000-02-16 2001-08-22 HILTI Aktiengesellschaft Outil de forage pour la pierre
EP1125664A2 (fr) * 2000-02-16 2001-08-22 HILTI Aktiengesellschaft Outil de forage pour pierre
EP1125664A3 (fr) * 2000-02-16 2002-06-05 HILTI Aktiengesellschaft Outil de forage pour pierre
EP1125663A3 (fr) * 2000-02-16 2002-06-05 HILTI Aktiengesellschaft Outil de forage pour la pierre
EP1852202A1 (fr) * 2006-05-03 2007-11-07 Irwin Industrial Tools GmbH Tête de forage pour un outil de forage et outil de forage
AT13738U1 (de) * 2013-03-05 2014-07-15 Dywidag Systems Int Gmbh Bohrkrone
EP3336302A1 (fr) * 2016-12-16 2018-06-20 HILTI Aktiengesellschaft Foret
WO2018108656A1 (fr) * 2016-12-16 2018-06-21 Hilti Aktiengesellschaft Trépan

Also Published As

Publication number Publication date
EP0884448B1 (fr) 2004-12-08
EP0884448A3 (fr) 2002-03-27
JPH1193558A (ja) 1999-04-06
JP4046851B2 (ja) 2008-02-13
DE19724373A1 (de) 1998-12-17
US6129162A (en) 2000-10-10
DK0884448T3 (da) 2005-04-11
DE59812348D1 (de) 2005-01-13

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