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EP0778391B1 - Perceuse rotative hélicoidale à percussion - Google Patents

Perceuse rotative hélicoidale à percussion Download PDF

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Publication number
EP0778391B1
EP0778391B1 EP96810657A EP96810657A EP0778391B1 EP 0778391 B1 EP0778391 B1 EP 0778391B1 EP 96810657 A EP96810657 A EP 96810657A EP 96810657 A EP96810657 A EP 96810657A EP 0778391 B1 EP0778391 B1 EP 0778391B1
Authority
EP
European Patent Office
Prior art keywords
cutting edges
supplementary
cutting
drill
shaft
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
EP96810657A
Other languages
German (de)
English (en)
Other versions
EP0778391A2 (fr
EP0778391A3 (fr
Inventor
Werner Kleine
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 EP0778391A2 publication Critical patent/EP0778391A2/fr
Publication of EP0778391A3 publication Critical patent/EP0778391A3/fr
Application granted granted Critical
Publication of EP0778391B1 publication Critical patent/EP0778391B1/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 rotary impact twist drill according to the generic Preamble of claim 1.
  • Rotary impact twist drills are drilling tools that are used in conjunction with axial impact assisted Rotary drilling rigs are used. In particular, it concerns in usually around rock or masonry drills that are used for the rotary impact creation of holes or breakthroughs in concrete or masonry can be used.
  • a twist drill for drilling work in solid rock is known, the a drill shaft with two spirals running on the shaft for the Has drilling dust.
  • Tungsten carbide cutting edges are provided at the shaft end Chisel and abrasively process the subsurface to create a drill hole.
  • the Tungsten carbide blades are arranged in a cross shape in the end face of the shaft end protrude axially beyond the end face.
  • the hard metal cutting edges on the one hand, on a continuous, over the diameter of the population extending hard metal plate, and provided on additional hard metal elements, the along a diameter of the shaft standing at 90 ° to the hard metal plate are arranged.
  • Between the main cutting edges arranged on the hard metal plate and the additional cutting edges are each essentially axially parallel to the shaft extending grooves provided, which open into the Abfuhmuten on the shaft. These serve the removal of the resulting from the abrasive processing of the surface Drill dust.
  • the main and additional cutting edges also have a radial projection opposite the jacket of the shank to prevent jamming of the drilling tool in the To prevent drilling. This well-known twist drill allows a moderate Drilling performance with reasonable wear of the carbide cutting edges.
  • a rotary impact twist drill is known, one along of a diameter of the shank and arranged carbide pins formed additional cutting edges, each having an axial and a radial Have protrusion over the shaft. They are on the carbide insert Main cutting of the drilling tool provided. The additional cutting edges are opposite axially reset the main cutting edges and essentially only meet Management functions for the drilling tool.
  • This improved rotary impact twist drill are the main and additional cutting edges in one that deviates from 90 ° Angle to each other.
  • the arrangement is selected such that in relation to the direction of rotation of the drilling tool that leading the cutting insert Additional cutting edge with this includes an angle that is greater than 90 °, while the additional cutting edge following the insert with it an acute angle includes.
  • This embodiment has the advantage that the area which the respective main cutting edge is upstream, expanded and the mouth of a widened main courage allowed. In the narrower area, to the trailing one Additional cutting edge, a narrow additional handling is provided. At this "X-like" arrangement of the insert and the secondary cutting edges is due to the Cutting plate upstream widened Kleinfahmuten an improved Drill dust removal and adequate guidance is ensured via the additional cutting edges.
  • the prerequisite should be created to Cutting insert and the additional cutting edges with regard to their specific stress to be able to optimize.
  • the central part of the Carbide cutting insert by the axial blows of the rotary impact drill others Is subjected to loads as the peripheral areas of the insert or the Additional cutting edges, which primarily cause shear forces.
  • the object of the present invention is therefore a rotary impact twist drill to be modified in such a way that these different loads of Carbide cutting can be taken into account.
  • the performance should of the drilling tool at least remain and a very good removal of the Bohrmehls be guaranteed.
  • DE 4306981 A discloses a rotary impact twist drill with a drill shank that with at least one spiraling along its length Main discharge groove is equipped for drilling dust and at the shaft end with a cutting plate and is equipped with additional cutting edges that are substantially X-shaped to each other in the End face at the end of the drill shaft are arranged and fixed and the end face and protrude axially or radially from the casing of the drill shaft, the additional cutting edges project peripheral regions of the cutting plate axially and / or radially, with reference to the direction of rotation of the rotary impact twist drill the angle between the additional cutting edges and the trailing insert is smaller than 90 ° and each additional cutting edge is one Main discharge groove is upstream.
  • a rotary impact twist drill which is the features stated in the characterizing section of claim 1.
  • the additional cutting edges project beyond the peripheral areas of the Cutting plate axially and / or radially. Relative to the direction of rotation of the rotary impact twist drill is the angle between the additional cutting edges and the subsequent one Cutting plate less than 90 °.
  • Each additional cutting edge is one of the main tasks upstream.
  • the broad main delivery paths for the drilling dust are covered in front of the direction of rotation of the drilling tool, the additional cutting edges.
  • the removed material is conveyed directly into the main discharge paths.
  • the Arrangement of the insert and the additional cutting edges in the shape of an X, in which the additional cutting edges leading in relation to the direction of rotation of the drilling tool form an acute angle of less than 90 ° with the following insert, allows to broaden the main process. This way is an even better one Removal of drilling dust guaranteed.
  • the cutting edges of the insert only fulfill Management function for the rotary impact twist drill and can with regard to their Task can be further optimized.
  • additional removal paths are provided which are related to the direction of rotation of the Rotary impact twist drill are located downstream of the additional cutting edges.
  • the Additional execution paths are in the narrowed area between the preceding ones Additional cutting and the insert arranged.
  • the guiding function of the peripheral areas of the cutting plate is thereby further improved that the end faces of the Cutting plate are curved, their curvature of the curvature of the Jacket of the drill shaft is aligned. If the over the shaft coat protruding areas of the insert in contact with the borehole wall come, because of the curved shape of their end faces they only slide on the Along the borehole wall and make practically no contribution to the abrasive Material removal. This reduces the friction of the drilling tool in the borehole.
  • the Center area preferably axially thickened. That way it becomes very high impact load on the center area of the insert, especially when Tapping into account.
  • the cutting insert is divided into segments, which are connected to each other via thin material webs. That way, be on The insert creates predetermined breaking points that prevent the insert breaks uncontrollably if it is subjected to excessive mechanical stress.
  • segmented design of the Insert material usually an expensive, special hard metal, can be saved can.
  • the radial distance of the additional cutting edges from the raised central area of the segmented cutting insert is greater than the length of the material webs.
  • a breakthrough drill Frictional resistance when drilling the hole The non-abrasive machined annular area of the subsurface has a very low stability and is simply through the leading insert or the face of the shaft crushed.
  • the insert is made of an impact-resistant material.
  • the Additional cutting edges which provide the main material removal, exist at this embodiment of the invention advantageously made of a harder material than that Cutting board. In this way, the cutting edges are different according to their Stress optimized.
  • the additional cutting edges lie on one another Diameter opposite and are the same distance from the center of the end face arranged.
  • Additional cutting edges are preferably load-bearing as edge-shaped cutting edges Tungsten carbide plate formed.
  • the embodiment of a rotary impact twist drill shown in supervision in FIG. 1 comprises a shaft 1 with two main discharge grooves 4, 5 for drilling dust.
  • the shaft 1 On its one shaft end 10, the shaft 1 is equipped with a cutting plate 6 which in a groove 9 extending over the diameter of the shaft 1, for example by soldering.
  • the cutting plate 6 has an approximately roof-shaped design Tungsten carbide blades 7, which rise from a surface 3 above Knife tip 8 withdraw axially outwards to the jacket 2 of the shaft 1.
  • additional cutting edges 11 are arranged in the end face, the longitudinal axis L includes an acute angle with the longitudinal extent of the cutting plate 6.
  • two additional cutting edges 11 are diametrically opposed to each other arranged opposite, their longitudinal axes L with a diameter of Shank 1 collapse.
  • the cutting plate 6 and the Additional cutting 11 essentially the shape of an X.
  • the additional cutting edges 11 at the same distance from the center of the End face 3 arranged.
  • the additional cutting edges 11 have one in relation to the jacket 2 of the shaft 1 radial projection r, which is greater than the radial projection s of the cutting plate 6.
  • the radial projection of the insert is at least 50% of the radial one Overhang of the additional cutting edges.
  • the additional cutting edges 11 Envelope circle H fixed, which is indicated by dashed lines in Fig. 1.
  • each additional cutting edge 11 is one of the main discharge paths 4, 5 upstream.
  • secondary removal grooves 14, 15 are arranged for drilling dust, which preferably open into the main discharge grooves 4, 5 along the shaft 1.
  • the axially parallel end faces 13 are the Cutting plate 6 is curved.
  • the curvature of the end faces 13 is the Curvature of the jacket 2 of the shaft 1 adjusted and preferably part of a Cylindrical surface.
  • the axially parallel end faces 12 of the. Envelope circle H fixing additional cutting edges 11 are preferably designed as cutting edges 22 to increase their abrasive effect.
  • FIGS. 4 and 5 show a further embodiment of an inventive Rotary percussion drill spiral. It comprises a shaft 1 with two main discharge grooves 4, 5 for drilling dust and is at its one shaft end 10 with a cutting plate 6 equipped, which is segmented.
  • the cutting plate 6 in a central cutting edge 17 and divided into peripheral segments 18 which are narrow Material webs 19 are connected to one another, as shown in FIGS. 4 and 5.
  • the central cutting edge 17 projects beyond the peripheral segments 18 and points in its Center area a cross-sectional thickening 20.
  • Which is about the diameter of the shaft 1 extending groove 9 has a in the central region of the end face 3 Recess 16 on which to accommodate the thickened center region 20 of the Cutting plate 6 is formed. In this way, the cutting plate 6 is positively in the groove 9 fixed.
  • the additional cutting edges 11 protrude beyond the peripheral segments 18 of the cutting insert both axially and radially.
  • the distance of the additional cutting edges 11 from the raised one The area of the central cutting edge 17 is greater than the length of the thin material webs 19.
  • the peripheral segments 18 only perform management functions for the Rotary percussion flute drill bit.
  • the actual cutting performance is from the additional cutting edges 11 and to a smaller extent also taken over by the central cutting edge 17. Since the Cutting plate 6 and in particular the central cutting edge 17 in the example shown segmented variant of the insert primarily axial Axial impact on the tool, it is from Advantage to produce the cutting plate 6 from an impact-resistant material.
  • the Additional blades 11, which perform the actual mining performance and high subject to abrasive forces are made of a harder material than that Cutting plate 6. In both cases, these are suitable hard metal alloys, which are known per se from the prior art.
  • the end faces 23 parts of a cylindrical surface the curvature of the curvature of the Shell 2 of the shaft 1 largely corresponds.
  • FIGS. 1 and 3 are views shown. 7 is a front view from the direction of the Use with the borehole wall engaging free end face 12 of the Additional cutting edge 11.
  • the additional cutting edge 11 has approximately roof-shaped cutting edges 24 on. Its free end face 12 is also designed as a cutting edge 22 to make it abrasive To increase the effect in use.
  • the foot part 25 of the additional cutting edge is for example, rounded and is even better in shape the bottom of the receiving groove 26 in the shaft 1 adjusted.
  • the receiving grooves 26 for the additional cutting edges are, as shown in FIGS. 1 and 3, for example, as separate Grooves formed. In this way, the additional cutting edges 11 can be used independently from each other in their orientation to the cutting plate 6 are arranged. But it is also conceivable, the additional cutting edges 11 in a single, over the diameter of the Arrange shaft 1 extending receiving groove 26 and there for example by Fix in place.
  • the additional cutting edges protrude the peripheral areas of the cutting plate axially or radially or both axially and radial.
  • the additional cutting edges thus take over the function of main cutting edges and experience the greatest shear stress when drilling a hole. Since the actual material removal on the additional cutting edges are the broad ones Main procedure for drilling dust, related to the direction of rotation of the Drilling tool, the additional cutting edges. That way it will removed material is conveyed directly into the main discharge path.
  • the arrangement of the Cutting insert and the additional cutting edges in the form of an X in which the covered additional cutting edges leading in the direction of rotation of the drilling tool with the subsequent cutting insert an acute angle less than 90 ° allowed it to spread the main business. This way an even better discharge of the drilling dust guaranteed.
  • the cutting edges of the insert only fulfill Management function for the rotary impact twist drill and can with regard to their Task can be further optimized.

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  • 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 Tools (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (9)

  1. Foret hélicoïdal rotopercutant comprenant une tige de forage (1) qui est munie, d'au moins une gorge d'évacuation principale (4, 5) pour la poussière de forage s'étendant en spirale le long de son extension longitudinale et qui est pourvue, à l'extrémité de tige (10), d'une plaquette de coupe (6) et de taillants supplémentaires (11), lesquels sont disposés et immobilisés sensiblement en forme de X les uns par rapport aux autres dans la face frontale (3) à l'extrémité de la tige de forage (1) et dépassent axialement, respectivement radialement de la face frontale (3) et de la surface périphérique (2) de la tige de forage (1), les taillants supplémentaires (11) dépassant axialement et/ou radialement des zones périphériques de la plaquette de coupe (6) et, par rapport à la direction de rotation (R) du foret hélicoïdal rotopercutant, l'angle entre les taillants supplémentaires (11) et la plaquette de coupe consécutive (6) étant inférieur à 90° et une gorge d'évacuation principale (4, 5) précédant chaque taillant supplémentaire (11), caractérisé en ce qu'il est prévu, des gorges d'évacuation supplémentaires (14, 15) pour la poussière de forage qui, par rapport à la direction de rotation (R) du foret hélicoïdal rotopercutant, se trouvent après les taillants supplémentaires (11) et débouchent dans les gorges d'évacuation principales (4, 5) le long de la tige (1).
  2. Dispositif selon la revendication 1, caractérisé en ce que le débordement radial (s) de la plaquette de coupe (6) correspond à environ 50 % du débordement radial des taillants supplémentaires (r).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les faces frontales (13 ; 23) de la plaquette de coupe (6) qui s'étendent parallèlement à l'axe de la tige sont courbes, leur courbure étant adaptée à la courbure de la surface périphérique (2) de la tige de forage (1).
  4. Dispositif selon une des revendications précédentes, caractérisé en ce que la zone centrale de la plaquette de coupe (6) dépasse des zones périphériques et des taillants supplémentaires (11) et, de préférence, présente un renflement axial (20).
  5. Dispositif selon une des revendications précédentes, caractérisé en ce que la plaquette de coupe (6) est divisée en segments (17, 18) qui sont reliés entre eux par de minces ponts de matière (19).
  6. Dispositif selon les revendications 4 et 5, caractérisé en ce que la distance radiale des taillants supplémentaires (11) à la zone centrale en relief (17) de la plaquette de coupe segmentée (6) est supérieure à la longueur des ponts de matière (19).
  7. Dispositif selon une des revendications précédentes, caractérisé en ce que la plaquette de coupe (6) est constituée d'une matière résiliente, et en ce que les taillants supplémentaires (11) sont constitués d'une matière plus dure que celle de la plaquette de coupe (6).
  8. Dispositif selon une des revendications précédentes, caractérisé en ce que les taillants supplémentaires (11) sont mutuellement opposés sur un diamètre de la tige (1) et sont disposés à la même distance du centre sur la face frontale (3).
  9. Dispositif selon une des revendications précédentes, caractérisé en ce que les taillants supplémentaires (11) sont conçus sous la forme de plaquettes en métal dur portant des taillants en forme de toit (22, 24).
EP96810657A 1995-12-07 1996-10-02 Perceuse rotative hélicoidale à percussion Expired - Lifetime EP0778391B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19545648 1995-12-07
DE19545648A DE19545648A1 (de) 1995-12-07 1995-12-07 Drehschlag-Wendelbohrer

Publications (3)

Publication Number Publication Date
EP0778391A2 EP0778391A2 (fr) 1997-06-11
EP0778391A3 EP0778391A3 (fr) 1998-07-01
EP0778391B1 true EP0778391B1 (fr) 2003-08-20

Family

ID=7779439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810657A Expired - Lifetime EP0778391B1 (fr) 1995-12-07 1996-10-02 Perceuse rotative hélicoidale à percussion

Country Status (6)

Country Link
US (1) US5836410A (fr)
EP (1) EP0778391B1 (fr)
JP (1) JP3819500B2 (fr)
CN (1) CN1075431C (fr)
DE (2) DE19545648A1 (fr)
DK (1) DK0778391T3 (fr)

Families Citing this family (31)

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Publication number Priority date Publication date Assignee Title
DE19703994B4 (de) * 1997-02-03 2006-04-20 Drebo Werkzeugfabrik Gmbh Bohrer
DE19807394A1 (de) * 1998-02-21 1999-08-26 Hilti Ag Bohr- und/oder Meisselwerkzeug
DE19811887A1 (de) * 1998-03-18 1999-09-23 Plica Werkzeugfabrik Ag Mollis Hammerbohrwerkzeug
CN1081281C (zh) * 1998-09-02 2002-03-20 王培林 钻头
DE19860528B4 (de) * 1998-12-30 2006-12-07 Robert Bosch Gmbh Gesteinsbohrer für Hammerbohrmaschinen
US6338390B1 (en) 1999-01-12 2002-01-15 Baker Hughes Incorporated Method and apparatus for drilling a subterranean formation employing drill bit oscillation
DE29901285U1 (de) * 1999-01-26 1999-06-17 Plica Werkzeugfabrik Ag, Mollis Bohrwerkzeug
DE19916975A1 (de) * 1999-04-15 2000-10-19 Hilti Ag Gesteinsbohrer
DE19942985A1 (de) * 1999-09-09 2001-03-15 Hilti Ag Bohrwerkzeug
DE19942986A1 (de) 1999-09-09 2001-03-15 Hilti Ag Bohrwerkzeug
DE19942987A1 (de) * 1999-09-09 2001-03-15 Hilti Ag Bohrwerkzeug
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
DE10006932A1 (de) * 2000-02-16 2001-08-23 Hilti Ag Bohrwerkzeug für Gestein
DE10006936A1 (de) * 2000-02-16 2001-08-23 Hilti Ag Bohrwerkzeug für Gestein
DE10009732A1 (de) * 2000-03-02 2001-09-06 Hawera Probst Gmbh Gesteinsbohrer
DE10053344A1 (de) * 2000-10-27 2002-05-08 Hilti Ag Gesteinsbohrer
EP1302290B1 (fr) * 2001-10-12 2008-07-02 Robert Bosch Gmbh Outil de forage
LU90862B1 (de) * 2001-12-17 2003-06-18 Cerametal Sarl Schlag-oder Hammerbohrer
AU2003200561B9 (en) * 2003-02-19 2009-07-02 Sandvik Intellectual Property Ab Drill bit
GB2404889A (en) * 2003-08-12 2005-02-16 Black & Decker Inc A cutting plate for a drill bit
DE10351183A1 (de) 2003-11-03 2005-06-02 Illinois Tool Works Inc., Glenview Gesteinsbohrer
DE102006000201A1 (de) * 2006-04-27 2007-10-31 Hilti Ag Hartstoffeinsatz
CN103419284A (zh) * 2012-05-21 2013-12-04 博世电动工具（中国）有限公司 钻头
EP2669033B1 (fr) 2012-05-29 2015-11-04 Black & Decker Inc. Tête de coupe pour un foret.
AT13738U1 (de) * 2013-03-05 2014-07-15 Dywidag Systems Int Gmbh Bohrkrone
CN104493263A (zh) * 2014-09-28 2015-04-08 上海奥林汽车安全系统有限公司 一种高加工精度的双刃带麻花钻
US9981406B2 (en) * 2015-06-25 2018-05-29 Black & Decker Inc. Drill bit
DE102016000899A1 (de) 2016-01-28 2017-08-03 Universität Kassel Schneidwerkzeug für die spanende Bearbeitung eines Werkstückes
US10507534B2 (en) 2016-03-17 2019-12-17 O-Tags, Inc. Systems, methods, and apparatus for reliably installing survey tags
EP4059643A1 (fr) 2021-03-18 2022-09-21 Black & Decker Inc. Tête de coupe monobloc pour un foret

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Publication number Priority date Publication date Assignee Title
US2099677A (en) * 1936-03-19 1937-11-23 John P Cunningham Rock or earth drill bit
US2529788A (en) * 1948-07-06 1950-11-14 Carl A Signell Drill
DE2414354A1 (de) * 1974-03-26 1975-10-16 Heller Geb Gesteinsbohrer
DE3707798A1 (de) * 1987-03-11 1988-09-22 Hawera Probst Kg Hartmetall Gesteinsbohrer
DE3742661A1 (de) * 1987-12-16 1989-07-13 Hawera Probst Kg Hartmetall Gesteinsbohrer
DE3820695C2 (de) * 1988-06-18 1996-07-25 Hawera Probst Kg Hartmetall 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

Also Published As

Publication number Publication date
CN1075431C (zh) 2001-11-28
EP0778391A2 (fr) 1997-06-11
US5836410A (en) 1998-11-17
DE59610671D1 (de) 2003-09-25
JP3819500B2 (ja) 2006-09-06
DE19545648A1 (de) 1997-06-12
DK0778391T3 (da) 2003-12-15
CN1154900A (zh) 1997-07-23
EP0778391A3 (fr) 1998-07-01
JPH09177465A (ja) 1997-07-08

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