EP4204172A1 - Procédé de libération d'un raccordement à vis entre un équipement de carottage et un trépan, et équipement de carottage - Google Patents

Procédé de libération d'un raccordement à vis entre un équipement de carottage et un trépan, et équipement de carottage

Info

Publication number
EP4204172A1
EP4204172A1 EP21759293.0A EP21759293A EP4204172A1 EP 4204172 A1 EP4204172 A1 EP 4204172A1 EP 21759293 A EP21759293 A EP 21759293A EP 4204172 A1 EP4204172 A1 EP 4204172A1
Authority
EP
European Patent Office
Prior art keywords
drilling device
core
core drilling
drill bit
drive 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.)
Pending
Application number
EP21759293.0A
Other languages
German (de)
English (en)
Inventor
Martin Schaefer
Gabor Vida
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 EP4204172A1 publication Critical patent/EP4204172A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/06—Features relating to the removal of tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/11—Retention by threaded connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
    • B23B45/02—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by electric power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/04—Drills for trepanning
    • B23B51/0473—Details about the connection between the driven shaft and the tubular cutting part; Arbors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/31—Diamond
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
    • B23B2270/09—Details relating to unclamping

Definitions

  • the present invention relates to a method for loosening a screw connection between a core drilling device and a drill bit, the loosening of the screw connection being effected by providing torque peaks on the drive shaft of the core drilling device, which come into play when the drive shaft is driven counter to the actual drilling direction of the core drilling device will.
  • the invention relates to a core drilling device with which the proposed method can be carried out.
  • the core drilling device comprises a drive shaft with torque peaks, it being possible for the drive shaft to be driven in one drilling direction and in a second direction of rotation, which is opposite to the drilling direction.
  • the invention relates to a method for controlling a core drilling device, in which the reversal of the direction of rotation of a drive shaft of the core drilling device and the application of torque peaks to the drive shaft are combined with one another in such a way that the combination of reversal of the direction of rotation and torque peaks creates a screw connection between the core drilling device and a drill bit can be solved.
  • Core drills are known in the prior art, with which essentially cylindrical drill cores can be cut out of substrates to be processed, such as masonry, sand-lime brick or concrete. Lines or pipes, for example, can then be laid or used in the essentially cylindrical boreholes.
  • the core drills can be connected to drill bits, with the drill bits being driven into the subsurface in order to cut out the drill core.
  • Another way of making it easier to loosen a screw connection between the core drill and the drill bit is to use so-called "easy release rings". These are copper and/or rubber discs that can be attached between the core drill and the drill bit. However, such lightweight release rings have the disadvantage that their use reduces the rigidity of the drilling system consisting of the core drilling device and the drill bit. However, a reduced system rigidity can lead to difficulties when drilling, i.e. when starting a drilling process.
  • a third way of making it easier to loosen a screw connection between the core drill and the drill bit is to use a generous amount of lubricant.
  • this method is not suitable for representing a long-term satisfactory technical solution for separating the drill bit from the core drill.
  • the object on which the present invention is based is therefore to overcome the above-described deficiencies and disadvantages of the prior art and to provide a method and a core drilling device that enable the core drilling device and drill bit to be released particularly easily.
  • the solution should be easy to use and not lead to any additional soiling of the construction site.
  • This allows the drill bit to be detached from the core drill without additional tools such as wrenches and/or pipes.
  • a method for loosening a screw connection between a core drilling device and a drill bit comprising the following method steps: a) providing a core drilling device with
  • a drill bit which is attached to the core drill by means of a screw connection during operation of the core drill, and with
  • the basic idea of the invention is based on the interaction between the torque peaks and the changed direction of rotation of the drive shaft when the drill bit is to be released from the core drill.
  • torque peaks are momentary torque impulses that are significantly increased compared to the usual torque of the core drilling device.
  • torque peaks and “torque pulses” can be used synonymously in the context of the present invention.
  • the torque peaks are applied by the core drilling device, in which case the core drilling device can preferably comprise a motor, electronics and/or a control unit which are set up to cause both the reversal of the direction of rotation and the torque pulses or to control.
  • a method for controlling a core drilling device is thus also disclosed, with which a reversal of a direction of rotation of a drive shaft and the application of torque peaks to a drive shaft of a core drilling device can be controlled, with the control method being used to create a screw connection between the core drilling device and a drill bit can be solved.
  • the control method can be implemented, for example, as a computer program product that can be operated on the core drilling device.
  • a core drilling device can initially be operated in a first direction of rotation. This direction of rotation preferably represents the drilling direction of the drive shaft or the drill bit.
  • a drilling process with which a drill core is cut out of a subsoil, can be carried out with the core drill, with the drive shaft and the drill bit rotating in the drilling direction during the drilling process .
  • the core drill, the electronics of the core drill and/or its control unit cause the direction of rotation of the drive shaft or the drill bit to be changed from a first direction of rotation to a second direction of rotation.
  • This change in direction of rotation is referred to as “reversal of direction of rotation” within the meaning of the invention.
  • it is combined with rotary tips, ie in addition to the reversal of the direction of rotation, torque peaks are applied to the drive shaft of the core drilling device.
  • this preferably means that torque pulses are applied to the drive shaft while the drive shaft rotates in a second direction of rotation.
  • a reversal of the direction of rotation of a drive shaft of the core drilling device and the application of torque peaks to the drive shaft are combined with one another in such a way that the combination of a reversal of the direction of rotation and torque peaks, a screw connection between the core drill and a drill bit can be loosened.
  • the drive shaft of the core drilling device prefferably to be subjected to torque peaks during operation of the core drilling device in a second direction of rotation, so that a drill bit can be separated from the core drilling device by the combination of reversing the direction of rotation and applying torque peaks to the drive shaft.
  • a core drilling device with a drive shaft and a drill bit is provided.
  • the drive shaft is preferably set up to drive the drill bit. According to the invention, this can take place in a first direction of rotation, which is referred to as the “drilling direction” within the meaning of the invention.
  • the drilling direction is denoted by the reference "A”.
  • the drilling direction is the direction of rotation of the drive shaft in which a core is cut out of the ground. It can preferably also be referred to as the working or operating direction of the core drilling device.
  • operation of the core drilling device in the drilling direction can be used to support the assembly of the drill bit.
  • the rotation of the drive shaft of the core drill "in the direction of drilling” can be used to tighten the drill bit and thus strengthen the screw connection between core drill and drill bit.
  • the core drilling device proposed in the context of the present invention is able to drive the drill bit in a second direction of rotation in addition to the drilling direction, this second direction of rotation being opposite to the first direction of rotation.
  • the second direction of rotation is denoted by the reference symbol "B".
  • the core drilling device or its drive shaft is set up to drive the drill bit in a drilling direction and in a direction of rotation opposite to the drilling direction. This second direction of rotation is used in the context of the invention in order to detach the drill bit from the core drill.
  • the reversal of the direction of rotation is referred to as operation of the core drilling device "opposite to the drilling direction” or “in the second direction of rotation”, meaning operation of the core drilling device in which the drive shaft of the core drilling device is driven in the opposite direction to the drilling direction.
  • the phrases "opposite to the drilling direction” and “in the second direction of rotation” are preferably used synonymously within the meaning of the invention. It is therefore preferred within the meaning of the invention that a direction of rotation of the drive shaft or the drill bit of the core drilling device is changed when the drill bit is to be separated from the core drilling device.
  • a change in the direction of rotation preferably means that the direction of rotation of the core drilling device is from a first direction of rotation to a second direction of rotation, i.e. that the drive shaft or the drill bit no longer rotates in one direction of rotation, but in a direction of rotation opposite to the direction of rotation.
  • This reversal of the direction of rotation can cause or facilitate the loosening or unscrewing of the drill bit from the core drilling device.
  • torque peaks are applied to the drive shaft of the core drilling device, with the aid of which the screw connection between the drill bit and the core drilling device can be loosened.
  • the inertia of the drill bit contributes to the separation of the drill bit from the core drilling device.
  • fixing the drill bit can help when releasing the drill bit from the core drill. The drill bit is fixed in such a way that it does not rotate when the drive shaft rotates.
  • the invention provides a technical possibility for separating a screw connection between the core drilling device and the drill bit, which does not require additional aids or tools and is based on reversing the direction of rotation of the drive shaft and on applying torque peaks to the drive shaft of the core drilling device.
  • the invention relates to a core drilling device, wherein the core drilling device is set up to carry out the method according to one of the preceding claims.
  • the terms, definitions and technical advantages introduced for the separation process preferably apply analogously to the core drilling device.
  • a technical solution can be provided which advantageously enables the screw connection between the core drilling device and drill bit to be loosened without tools.
  • the core drill is preferably enabled to carry out the proposed separation method by comprising a drill bit and a drive shaft, wherein torque peaks can be applied to the drive shaft, which are designed to loosen a screw connection between the core drill and a drill bit , if the drive shaft of the core drilling machine is driven in the opposite direction to the drilling direction of the core drilling machine.
  • the drive shaft of the core drilling device is set up to be driven in a drilling direction and in a direction of rotation opposite to the drilling direction.
  • the core drilling device preferably comprises a motor for driving the drive shaft, the core drilling device or its motor preferably being designed in such a way that the drive shaft can be driven in two opposite directions of rotation.
  • the motor of the core drilling device is set up to generate torque peaks whose strength is sufficient to loosen the screw connection between the core drilling device and the drill bit.
  • the motor of the core drilling device is a brushless motor, since it is significantly easier to reverse the direction of rotation when using brushless motors.
  • the core drilling device is a diamond core drilling device and that the drill bit is a diamond drill bit.
  • Diamond core bits can be fitted with diamonds to increase their cutting performance over conventional core bits.
  • Diamond core drills are preferably those core drills which are used to drive diamond drill bits in a rotational movement in order to enable the drilling cores to be cut out of the subsurface.
  • FIG. 1 View of a preferred embodiment of the invention
  • FIG. 1 shows a proposed core drilling device 1 with which the proposed method for separating a drill bit 2 from a core drilling device 1 can be carried out.
  • the core drilling device 1 is connected to a drill bit 2 during its operation, i.e. when it is used for cutting cores out of a subsurface, whereby the core bit 2 is driven into the subsurface in order to cut out the core.
  • the drill bit 2 is caused to rotate by a drive shaft 3 of the core drilling device 1 , the drive shaft 3 in turn being driven by a motor 5 of the core drilling device 1 .
  • the drive shaft 3 or the drill bit 2 is operated in a drilling direction A during operation of the core drilling device 1, i.e. during a drilling process.
  • this preferably means that the drill bit 2 rotates, for example, in a clockwise direction or is driven to rotate in a clockwise direction when a drill core is to be cut out of a subsoil.
  • the connection between the core drilling device 1 and the drill bit 2 is formed in particular by a screw connection 6 .
  • Possible examples of a first direction of rotation A and a second direction of rotation B are indicated schematically in FIG. 1 with arrows. In the actual implementation of the invention, the directions of rotation A, B can of course also be reversed.
  • the present invention provides that the core drilling device 1 is operated in a second direction of rotation B, which is opposite to the drilling direction A.
  • the direction of rotation is reversed by changing the direction of rotation of the core drill 1 .
  • This change in the direction of rotation preferably consists in the fact that the direction of rotation of the core drilling device 1 is switched from a first direction of rotation A to a second direction of rotation B.
  • a counterclockwise direction of rotation would correspond to the second direction of rotation B, while a clockwise rotation would correspond to the drilling direction A or first direction of rotation A.
  • torque peaks 4 are applied to the drive shaft 3 of the core drilling device 1, with which the screw connection 6 between the core drilling device 1 and the drill bit 2 can be loosened.
  • the inertia of the drill bit 2 is used for this purpose.
  • the drive shaft 3 of the core drill 1 can be subjected to torque peaks 4, with the torque peaks zen 6 have such a strength that the drill bit 2 can be detached from the core drill 1 with them.

Landscapes

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

Abstract

L'invention concerne un procédé de libération d'un raccordement à vis (6) entre un équipement de carottage (1) et un trépan (6). Le raccordement à vis est libéré en appliquant des pics de couple à l'arbre d'entraînement (3) de l'équipement de carottage, lesdits pics étant produits lorsque l'arbre d'entraînement est entraîné à l'encontre de la direction de forage réelle de l'équipement de carottage. Un second aspect de l'invention concerne un équipement de carottage (1) au moyen duquel le procédé proposé peut être mis en œuvre. Un autre aspect de l'invention concerne un procédé de commande d'équipement de carottage (1). L'inversion de la direction de rotation d'un arbre d'entraînement de l'équipement de carottage et l'application de pics de couple à l'arbre d'entraînement sont combinées de telle sorte qu'un raccordement à vis entre l'équipement de carottage et un trépan peut être libéré par la combinaison des pics de couple et de l'inversion de direction de rotation.
EP21759293.0A 2020-08-26 2021-08-12 Procédé de libération d'un raccordement à vis entre un équipement de carottage et un trépan, et équipement de carottage Pending EP4204172A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20192833.0A EP3960342A1 (fr) 2020-08-26 2020-08-26 Procédé de libération d'un raccordement à vis entre un appareil de carottage et une couronne de forage et appareil de carottage
PCT/EP2021/072467 WO2022043073A1 (fr) 2020-08-26 2021-08-12 Procédé de libération d'un raccordement à vis entre un équipement de carottage et un trépan, et équipement de carottage

Publications (1)

Publication Number Publication Date
EP4204172A1 true EP4204172A1 (fr) 2023-07-05

Family

ID=72242995

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20192833.0A Withdrawn EP3960342A1 (fr) 2020-08-26 2020-08-26 Procédé de libération d'un raccordement à vis entre un appareil de carottage et une couronne de forage et appareil de carottage
EP21759293.0A Pending EP4204172A1 (fr) 2020-08-26 2021-08-12 Procédé de libération d'un raccordement à vis entre un équipement de carottage et un trépan, et équipement de carottage

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20192833.0A Withdrawn EP3960342A1 (fr) 2020-08-26 2020-08-26 Procédé de libération d'un raccordement à vis entre un appareil de carottage et une couronne de forage et appareil de carottage

Country Status (3)

Country Link
US (1) US20230311217A1 (fr)
EP (2) EP3960342A1 (fr)
WO (1) WO2022043073A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4289532A1 (fr) * 2022-06-07 2023-12-13 Hilti Aktiengesellschaft Procédé de desserrage et de serrage d'une connexion vissée entre un appareil de carottage et une couronne de forage et appareil de carottage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060280569A1 (en) * 2004-12-23 2006-12-14 Davis John D Hole Saw Arbor System For Power Drill Assisted Tightening And Loosening
US7802948B1 (en) * 2006-06-07 2010-09-28 Matthew R Bastiaans Drill extender
EP3661700B1 (fr) * 2017-07-31 2023-05-31 Milwaukee Electric Tool Corporation Outil électrique rotatif

Also Published As

Publication number Publication date
WO2022043073A1 (fr) 2022-03-03
EP3960342A1 (fr) 2022-03-02
US20230311217A1 (en) 2023-10-05

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