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WO2004054771A1 - Outil de perçage comprenant des elements coupants abrasifs, et machine de perçage entrainant ledit outil - Google Patents

Outil de perçage comprenant des elements coupants abrasifs, et machine de perçage entrainant ledit outil Download PDF

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Publication number
WO2004054771A1
WO2004054771A1 PCT/DE2003/001979 DE0301979W WO2004054771A1 WO 2004054771 A1 WO2004054771 A1 WO 2004054771A1 DE 0301979 W DE0301979 W DE 0301979W WO 2004054771 A1 WO2004054771 A1 WO 2004054771A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotation
drilling
drilling tool
carrier
drill
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.)
Ceased
Application number
PCT/DE2003/001979
Other languages
German (de)
English (en)
Inventor
Rudolf Fuchs
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2004054771A1 publication Critical patent/WO2004054771A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • B28D1/146—Tools therefor

Definitions

  • the present invention relates to a drilling tool with a drill body. which has at one end a drill head provided with abrasive cutting elements and which can be driven to rotate about a longitudinal axis. Furthermore, the invention is based on a drilling machine which is suitable for the operation of said drilling tool.
  • abrasive cutting elements are usually made of hard metal or diamond.
  • the drill body of the drilling tool is a solid cylinder, one end of which forms the drilling head is occupied by the abrasive cutting elements.
  • the drill body of the drilling tool is a hollow cylinder, the end face of which is covered with abrasive cutting elements.
  • Such a drilling tool is also referred to as a drill bit.
  • the drill body is a solid cylinder
  • all of the material has to be cleared from the borehole by the drilling tool.
  • the same abrasive cutting elements are always in use on the drill head, which leads to leads to a very strong heating of the cutting elements and the entire drill body.
  • a high rotational speed or a high contact pressure if the rotational speed of the drilling tool is kept low, is necessary in order to clear the hard material (concrete, stone, etc.) from the borehole.
  • the abrasive cutting elements are also continuously in use during the drilling process, which in turn leads to a very strong heating of the cutting elements and the entire drill body.
  • a high contact pressure on the drilling tool is also necessary because a large number of abrasive cutting elements distributed on the end face of the hollow cylinder must be brought into engagement. So in order to achieve a high material removal in the shortest possible time for drilling tools with abrasive cutting elements, the drilling tool must either be brought to a high speed, which results in a very strong temperature increase, or a high contact pressure must be applied to the drilling tool, which complicates the work process considerably.
  • the invention is therefore based on the object of specifying a drilling tool and a drilling machine suitable for its operation, whereby the disadvantages mentioned can be significantly reduced.
  • the stated object is achieved with the features of claim 1 in that in the drill head of the drill body, which can be driven to rotate about a longitudinal axis, at least one carrier, which is equipped with abrasive cutting elements and can be set into a rotational movement by a drive, is mounted, this rotational movement transverse to the Rotational movement of the drill body is aligned about its longitudinal axis.
  • the abrasive cutting elements are therefore no longer fixedly and immovably to the drill body of the drilling tool as in the prior art set out in the introduction, but they are movably arranged by means of the rotatable carrier, so that during a drilling process a constant change of the abrasives involved in the material removal Cutting elements are made.
  • a significant further advantage of the drilling tool according to the invention is that the abrasive cutting elements are simultaneously moved within the borehole in two directions running transversely to one another.
  • the abrasive cutting elements are moved in the borehole by the rotation of the drill body about its longitudinal axis, and a second movement superimposed on this rotational movement is caused by the fact that the carrier occupied with abrasive cutting elements executes a rotational movement which is oriented transversely to the rotational movement of the drill body about its longitudinal axis ,
  • the material removal in the borehole can be increased considerably compared to drilling tools which are fixedly arranged relative to the drill head.
  • An advantageous embodiment of the carrier which is equipped with abrasive cutting elements, is that it is designed as an endlessly circulating band which is guided in a path running over the drill head.
  • the carrier is a rotary body which penetrates the surface of the drill head, the axis of rotation of the rotary body being perpendicular to the longitudinal axis of the drill body.
  • the carrier can be driven to rotate in the same direction or to rotate oscillating, their direction of rotation constantly changing.
  • a drilling machine for a drilling tool with a drill body which has at one end a drill head provided with abrasive cutting elements, wherein this drill body can be inserted into a tool holder of the drill, which drives the drill body rotating about its longitudinal axis.
  • drive means are provided in the drilling machine with which at least one support mounted in the drilling head of the drilling tool and equipped with abrasive cutting elements can be set in rotation, this rotation movement being oriented transversely to the rotary movement of the drill body about its longitudinal axis.
  • An advantageous embodiment of the drilling machine is that the tool holder for the drilling tool is coupled to a hollow shaft which is operatively connected to a rotating drive present in the drilling machine, the rotatingly driven hollow shaft causing the drill body to rotate about its longitudinal axis, and that in the hollow shaft has a drive rod that is decoupled from its rotation, one end of which is fixed in the drilling machine or is operatively connected to a rotating drive in the drilling machine and the other end of which projects into the drill body and is operatively connected to a gear via which the carrier can be set in rotation.
  • Figure 1 is a partial view of a machine tool with a drilling tool used in its tool holder, which is designed as an endlessly rotating band, with abrasive
  • FIG. 2 shows a cross section AA through this drilling tool
  • 3 shows a section of a drilling tool with a carrier designed as a rotating body and equipped with abrasive cutting elements
  • FIG. 4 shows an end view of this drilling tool.
  • FIG. 1 shows a section of a drilling machine 1, in the tool holder 2 of which an engaging drilling tool 3 having abrasive cutting elements is engaged.
  • a motor 4 is arranged in the drilling machine 1, the motor shaft 5 of which is provided at the end with a pinion 6.
  • the motor shaft 5 is supported by means of a ball bearing 7 in an intermediate flange 8, which delimits the engine compartment from the gear compartment in the drilling machine.
  • the pinion 6 of the motor shaft 5 is in engagement with the ring gear 9 of a gear wheel 10, which belongs to a rotatably mounted intermediate shaft 11.
  • the intermediate shaft 11 is held, for example, by two bearings, a ball bearing 12 and a needle bearing 13 in the machine housing 14.
  • a ring gear 15 which is in engagement with the ring gear 16 of a gear wheel 17 which belongs to a hollow shaft 18 running parallel to the intermediate shaft 11.
  • the hollow shaft 18 is rotatably supported about its longitudinal axis in the machine housing 14 by means of a ball bearing 19.
  • the hollow shaft 18 forming part of the tool holder 2 widens towards its end on the tool side.
  • the opening of the hollow shaft 18 on the tool side is partially conical, so that an insertion shaft 20 of the drilling tool 3 which is inserted into the tool holder 2 and which is also at least partially conical is centered in the tool holder 2.
  • a section 21 of the tool-side opening of the hollow shaft 18 and a corresponding section 22 of the insertion shaft 20 of the drilling tool 3 have a polygonal profile. The meshing of the polygonal profiles of section 21 of the hollow shaft opening and section 22 of the insertion shaft 20 the drilling tool 3 is held against rotation in the hollow shaft 18.
  • At least one locking element 23 is provided for axially locking the drilling tool 3 in the hollow shaft 18 of the tool holder 2.
  • the locking elements 23 are each arranged in an opening 24 which passes through the outer wall of the hollow shaft 18 radially and obliquely to the longitudinal axis of the hollow shaft.
  • a radially inner end 25 of the locking element 23 is guided in the opening 24 assigned to it in the wall of the hollow shaft 18 and can engage radially in the opening of the hollow shaft 18 receiving the insertion shaft 20 of the drilling tool 3.
  • a radially outer end 26 of the locking element 23 is axially displaceably mounted in the opening 24.
  • the locking elements 23 form-fit into pockets, not shown, of a locking sleeve 27.
  • the locking sleeve 27 is acted upon by a spring 28 in the direction of its locking position.
  • the spring On the machine side, the spring is supported on a retaining ring 29 held on the hollow shaft 18.
  • the locking sleeve 27 is displaceable against the spring 28 via an actuating sleeve 30. It can move axially forward
  • the drilling tool 3 is locked in the tool holder 2 by first inserting the insert shaft 20 into the receiving opening of the hollow shaft 18 until the end face of the insert shaft 20 at the end 25 of the protruding into the opening of the hollow shaft 18
  • Locking elements 23 abuts. By inserting the drilling tool 3 further, the end 25 becomes each
  • Locking element 23 pressed into the fürbrü ⁇ he in the wall of the hollow shaft 18, the other end 26 of the locking element 23, the locking sleeve 27 against the Pushes back spring 28 so that it can dodge axially. If the insertion shaft 20 is inserted sufficiently far into the opening of the hollow shaft 18, the locking elements 23 can snap back into an annular recess 32 let into the insertion shaft 20. In this position of the locking elements 23, the insertion shaft 20 is locked in the axial direction in the hollow shaft 18. In this position, the end face of the insertion shaft 20 comes to rest against a sealing washer 33 embedded in the hollow shaft 18 and deforms it elastically.
  • the actuating sleeve 30 with the locking sleeve 27 must be moved backwards against the spring 28, as a result of which the ends 25 of the locking elements 23 are retracted into the openings: j.2-.
  • the drilling tool 3 can now be removed from the hollow shaft 18.
  • the locking mechanism described above for the insertion shaft 20 of the drilling tool 3 represents a possible embodiment for locking a drilling tool 3 according to the invention described below. Any other configuration of the locking for the insertion shaft of the drilling tool 3 can be used. The same also applies to the embodiment of the rotary drive for the hollow shaft 18 shown as an example in FIG. 1. Any execution forms are also permitted for the rotary drive of the hollow shaft 18.
  • the drilling tool 3 of which a cross section AA is shown in FIG. 2, has an elongated drill body 34 which adjoins the insertion shaft 20 and which, as shown in FIG. 2, preferably has a round cross section. At its end facing away from the drilling machine 1, the drill body 34 is rounded. A circumferential path 35 is let into the surface of the drill body 34 and leads over the end forming the drill head of the drilling tool 3. In this path 35 there is a carrier 36, which is designed as an endlessly circulating band and is covered on its upper side with abrasive cutting elements 37 consisting, for example, of diamond or hard metal. According to the principle a chain saw, this band-shaped carrier 36 runs in the path 35 on the drill body 34.
  • the drive for this rotational movement of the band-shaped carrier 36 takes place by means of a gearwheel 38 inserted into the drill body 34, the teeth 39 of which on the outer circumference are engaged with teeth 40 present on the underside of the band-shaped carrier 36.
  • the axis of rotation 41 of the gear wheel 38 is perpendicular to the longitudinal axis 42 of the drill body 34. If the gear wheel 38 is rotated about its axis of rotation 41, the band-shaped carrier 36 with the abrasive cutting elements 37 located thereon rotates in the path 35 of the drill body 34.
  • the abrasive cutting elements 37 on the drill head which is the rounded end face of the drill body 34, are moved in a direction that is transverse to the rotational movement of the drill body 34 about its longitudinal axis 42.
  • the abrasive cutting elements 37 thus carry out two superimposed, transversely aligned movements in the borehole.
  • a higher material removal in the borehole can thus be achieved without a very high contact pressure having to be exerted on the drilling tool 3.
  • the rotational movement of the band-shaped carrier 36 results in a constant exchange of the abrasive cutting elements 37 involved in the material removal, which means that the abrasive cutting elements 37 do not become extremely hot.
  • a drive shaft 43 which is guided through the hollow shaft 18, is provided for driving the gearwheel 38, which allows the band-shaped carrier 36 to rotate in the path 35 of the drill body 34.
  • This drive shaft runs coaxially to the longitudinal axis of the hollow shaft 18 and thus coaxially to the longitudinal axis 42 of the drill body 34.
  • the drive shaft 43 is completely decoupled from the rotary movement of the hollow shaft 18.
  • the drive shaft 43 is in the hollow shaft 18 via a ball bearing 44 rotatably mounted.
  • the drive shaft 43 has a toothed wheel 45, the outer ring gear 46 of which meshes with the pinion 6 of the motor shaft 5.
  • the motor shaft 5 drives not only via the intermediate shaft 11 to the hollow shaft 18, but independently of it also the drive shaft 43.
  • a gear can be used, which the speed of the motor shaft 5 to a desired speed for the drive shaft 43 translated.
  • the drive shaft 43 is brought through a bore 47 in the drill body 34 to the gear 38.
  • the drive shaft 43 has a bevel gear 48 which meshes with a bevel gear 49 seated on the axis of rotation 41 of the gear 38.
  • the gear 38 with its bevel gear 49 connected to it are arranged in the drill body 34 such that the axis of rotation of the bevel gear 48 on the drive shaft 43 coincides with the longitudinal axis 42 of the drill body 34.
  • the gear 38 and thus the band-shaped carrier 36 can be set in rotation, in that the bevel gear 49 on the gear 38 is set in rotation by the bevel gear 48 on the drive shaft 43.
  • the bevel gear 49 rotates on the gear 38 either by rotating the bevel gear 48 via the drive shaft 43 and converting this rotation to the bevel gear 49.
  • the bevel gear 49 can also experience a rotation by rolling the drill body 34 about its longitudinal axis 42 over the bevel gear 48 of the drive shaft 43, which is fixed relative to the drill body 34.
  • the drive shaft 43, decoupled from the hollow shaft 18, only needs to be fixed in the drilling machine and does not require any drive by the motor shaft 5.
  • the carrier can be a rope equipped with diamond particles, which runs over two rollers.
  • the drill body consists of the two rollers, which are held at a fixed distance from each other.
  • FIGS. 3 and 4 show a further exemplary embodiment of a drilling tool with a rotatable carrier 50 for abrasive cutting elements 37 arranged therein.
  • Figure 3 shows a cross section through the front part of the Drilling tool
  • Figure 4 shows a view B on the front of the drill head of this drilling tool.
  • Parts of the drilling tool that have already been described in connection with FIGS. 1 and 2 have the same reference numerals as in FIGS. 1 and 2.
  • the carrier 50 arranged in the drill body 34 for the abrasive cutting elements 37 is a rotating body.
  • the rotating body is a disk, but it can also be designed as a ball.
  • This carrier 50, designed as a rotating disk is rotatably mounted in the drill head about an axis of rotation 51, which is oriented perpendicular to the longitudinal axis 42 of the drill body 34, and partially penetrates the surface of the drill head.
  • an opening 52 is provided in the drilling head of the drilling tool 34, from which part of the carrier 50, here the rotating disk, emerges.
  • the rotary drive for the carrier 50 designed as a rotating body takes place in the same way as the drive of the gear 38 of the band-shaped carrier 36 according to FIGS. 1 and 2.
  • a bevel gear 53 is connected to the carrier 50 designed as a rotating body, the axis of rotation of which is the axis of rotation 51 of the Carrier 50 is.
  • the bevel gear 53 is driven by a bevel gear 54 which is located at the end of the drive shaft 43.
  • this drive shaft 43 is led out of the drilling machine 1 through a bore 47 running centrally in the drill body 34 up to the carrier 50.
  • the carrier 50 is driven by means of the two bevel gears 53, 54 and the drive shaft 43 in the same way as in the exemplary embodiment described above and shown in FIGS. 1 and 2.
  • this carrier 50 designed as a rotating body is the same as that of the band-shaped carrier 36 shown in FIGS. 1 and 2 two orthogonal movements are superimposed on one another, which leads to a more effective material removal in the borehole, and extreme heating of the abrasive cutting elements is prevented because these are only involved in the material removal for a short time due to the rotation of the carrier.
  • the drive shaft 43 can be driven in the drilling machine 1 in such a way that it constantly rotates in a predetermined direction, with the result that the carrier 36, 50 also has a single direction of rotation.
  • a drive can also be provided, which sets the drive shaft in an oscillating, constantly changing direction of rotation, so that the carrier 36, 50 consequently also performs an oscillating reciprocating movement.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

La présente invention concerne un outil de perçage qui permet un enlèvement de matière efficace dans le trou percé, et évite un échauffement trop important des éléments coupants abrasifs (37) présents sur sa tête de perçage. L'outil de perçage est conçu de sorte qu'il peut être entraîné en rotation d'un côté autour de son axe longitudinal (42). De plus, la tête de perçage comprend au moins un support (36) occupé par des éléments coupants abrasifs (37), qui peut être mis en rotation par un entraînement (43, 48, 49), ce mouvement de rotation étant transversal au mouvement de rotation de l'outil de perçage (3) autour de son axe longitudinal (42). Une machine de perçage (1) correspondante comprend des éléments (5, 11, 18, 43) qui entraînent en rotation l'outil de perçage (3) autour de son axe longitudinal (42) et mettent d'autre part le support (36) en rotation.
PCT/DE2003/001979 2002-12-16 2003-06-13 Outil de perçage comprenant des elements coupants abrasifs, et machine de perçage entrainant ledit outil Ceased WO2004054771A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10258605.5 2002-12-16
DE2002158605 DE10258605A1 (de) 2002-12-16 2002-12-16 Bohrwerkzeug mit abrasiven Schneidelementen und eine dieses antreibende Bohrmaschine

Publications (1)

Publication Number Publication Date
WO2004054771A1 true WO2004054771A1 (fr) 2004-07-01

Family

ID=32477661

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/001979 Ceased WO2004054771A1 (fr) 2002-12-16 2003-06-13 Outil de perçage comprenant des elements coupants abrasifs, et machine de perçage entrainant ledit outil

Country Status (3)

Country Link
DE (1) DE10258605A1 (fr)
TW (1) TW200410779A (fr)
WO (1) WO2004054771A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7735575B2 (en) 2007-11-21 2010-06-15 Black & Decker Inc. Hammer drill with hard hammer support structure
US7854274B2 (en) 2007-11-21 2010-12-21 Black & Decker Inc. Multi-mode drill and transmission sub-assembly including a gear case cover supporting biasing
US7798245B2 (en) 2007-11-21 2010-09-21 Black & Decker Inc. Multi-mode drill with an electronic switching arrangement
US7770660B2 (en) 2007-11-21 2010-08-10 Black & Decker Inc. Mid-handle drill construction and assembly process
US7717191B2 (en) 2007-11-21 2010-05-18 Black & Decker Inc. Multi-mode hammer drill with shift lock
US7762349B2 (en) 2007-11-21 2010-07-27 Black & Decker Inc. Multi-speed drill and transmission with low gear only clutch
US7717192B2 (en) 2007-11-21 2010-05-18 Black & Decker Inc. Multi-mode drill with mode collar
DE102011005008A1 (de) 2011-03-03 2012-09-06 Robert Bosch Gmbh Werkzeugmaschinentrennvorrichtung
DE102011005019A1 (de) * 2011-03-03 2012-09-06 Robert Bosch Gmbh Werkzeugmaschinensystem
DE102011005018A1 (de) * 2011-03-03 2012-09-06 Robert Bosch Gmbh Werkzeugmaschinensystem
DE102011005020A1 (de) * 2011-03-03 2012-09-06 Robert Bosch Gmbh Werkzeugmaschinensystem
DE102011005007A1 (de) * 2011-03-03 2012-09-06 Robert Bosch Gmbh Werkzeugmaschinentrennvorrichtung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2134164A (en) * 1938-01-31 1938-10-25 Clinton B Holt Rotatable drill bit
US3338321A (en) * 1965-02-23 1967-08-29 Duff Stewart Well boring drill
US3695370A (en) * 1970-10-14 1972-10-03 Hycalog Inc Drilling apparatus
US4256191A (en) * 1979-03-28 1981-03-17 Reed Tool Company Intermittent high-drag oil well drilling methods and apparatus
WO1999034085A1 (fr) * 1997-12-29 1999-07-08 Stefano Tongiani Foret a rotations combinees
US5924500A (en) * 1996-05-21 1999-07-20 Tracto-Technik, Paul Schmidt, Spezialmaschinen Steerable boring machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2134164A (en) * 1938-01-31 1938-10-25 Clinton B Holt Rotatable drill bit
US3338321A (en) * 1965-02-23 1967-08-29 Duff Stewart Well boring drill
US3695370A (en) * 1970-10-14 1972-10-03 Hycalog Inc Drilling apparatus
US4256191A (en) * 1979-03-28 1981-03-17 Reed Tool Company Intermittent high-drag oil well drilling methods and apparatus
US5924500A (en) * 1996-05-21 1999-07-20 Tracto-Technik, Paul Schmidt, Spezialmaschinen Steerable boring machine
WO1999034085A1 (fr) * 1997-12-29 1999-07-08 Stefano Tongiani Foret a rotations combinees

Also Published As

Publication number Publication date
DE10258605A1 (de) 2004-07-08
TW200410779A (en) 2004-07-01

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