EP1157752A2 - Outil avec adapteur ultrason - Google Patents

Outil avec adapteur ultrason Download PDF

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Publication number
EP1157752A2
EP1157752A2 EP01810469A EP01810469A EP1157752A2 EP 1157752 A2 EP1157752 A2 EP 1157752A2 EP 01810469 A EP01810469 A EP 01810469A EP 01810469 A EP01810469 A EP 01810469A EP 1157752 A2 EP1157752 A2 EP 1157752A2
Authority
EP
European Patent Office
Prior art keywords
tool
transformer
tool device
electroacoustic transducer
assigned
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
EP01810469A
Other languages
German (de)
English (en)
Other versions
EP1157752A3 (fr
EP1157752B1 (fr
Inventor
Adrian Kauf
Walter Littmann
Stefan Tichy
Jörg WALLASCHEK
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 EP1157752A2 publication Critical patent/EP1157752A2/fr
Publication of EP1157752A3 publication Critical patent/EP1157752A3/fr
Application granted granted Critical
Publication of EP1157752B1 publication Critical patent/EP1157752B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/041—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators

Definitions

  • the invention relates to a tool device, for example a core drilling device or a grinding device, with an ultrasonic adapter for e.g. abrasive or machining of Solids, such as building materials such as stone, metal or wood.
  • a tool device for example a core drilling device or a grinding device
  • an ultrasonic adapter for e.g. abrasive or machining of Solids, such as building materials such as stone, metal or wood.
  • the abrasive sawing processing of rock via an at least partially rotating, with Cylindrical drill bit with hard materials on its end face is, for example, from EP0280835 previously known.
  • Such drill bits usually use water as the rinsing and cooling liquid.
  • the ultrasonic vibrations are generated by capacitive electro-acoustic Transducers formed in the ultrasonic frequency range.
  • the electrostatic converter can, for example be constructed from pre-stressed piezo disks.
  • Capacitive electroacoustic transducers in the ultrasonic frequency range consist of an electrostrictive material as the dielectric of a capacitor, which changes its dimension under an applied electrical voltage.
  • Such a trained capacitor has a due to its mechanical properties Self-response on.
  • Capacitive electroacoustic transducers require sufficient to generate Deformations a high voltage.
  • a hand tool device has a rotating cylindrical, abrasive material-removing tool on the one made of electrostrictive material capacitive electroacoustic transducers axially superimposed on a longitudinal ultrasound field is.
  • the drill bit is in accordance with the amplitude resonance to the frequency of the ultrasound field designed.
  • an ultrasonic adapter for a rotating tool driving, drilling machine a rotating, made of electrostrictive material, capacitive electro-acoustic transducer based on slip rings with an ultrasonic frequency AC voltage is connected.
  • a disadvantage of such an energy supply is the wear caused by the mechanical contact, which increases the service life limited.
  • ring-shaped rotatable rotary transmitters or Transformers with circular U-cores for stator and rotor which via assigned coils electrical energy via an alternating magnetic field transferred from the stator to the rotor.
  • the object of the invention is to avoid the above disadvantages in the implementation of a Tool device with an ultrasonic adapter for impressing an ultrasonic vibration on the tool.
  • Another aspect is the superposition of a rotary movement the tool with an ultrasonic vibration.
  • the ultrasound adapter essentially has one for contactless energy transmission
  • a capacitive electroacoustic transducer connected to the secondary winding of a transformer, whose primary winding with an AC voltage electric ultrasonic frequency generator generating in the ultrasonic range is connected and thus the electrical power via the alternating magnetic field transmits contactlessly to the capacitive electroacoustic transducer, the secondary winding at the same time in connection with the capacitive electroacoustic transducer forms a parallel resonance circuit and, in the event of resonance, a voltage surge causes.
  • the resonance frequencies are further advantageous with the frequency of the ultrasound frequency generator the capacitive electroacoustic transducer, the secondary resonant circuit, the Primary resonant circuit and the amplitude of the longitudinal vibrations of the tool, especially a drill bit, coordinated.
  • a subcomponent of the transformer of contactless energy transmission is advantageous, for example, the secondary winding to tune the electrical resonant circuit with the capacitive electroacoustic transducer.
  • the mass of a subcomponent of the transformer of the contactless is also advantageous Energy transfer, e.g. the mass of the inner transformer core, for coordination of the mechanical resonance circuit of the tool can be used.
  • the transformer of two coils within two, one with the opening is advantageous assigned, U-shell cores formed, which together thus essentially one Form closed shell core, with one U-shell core, a coil rotatably assigned.
  • the rotatable transformer consists of two nested, U-shaped shell cores oriented opposite to the tool axis, which coils are assigned in a rotationally fixed manner and oriented parallel to the tool axis include, the primary winding being connected to the tool device in a rotationally fixed manner Stator and the secondary winding the rotor connected to the tool in a rotationally fixed manner assigned.
  • An inner U-shell core and is also advantageously located with respect to a diameter the secondary coil inside and an outer U-shell core and the primary coil inside radially outer, whereby there is a degree of freedom of movement parallel to the tool axis along this a decoupling of the vibration and a dismantling of the transformer, For example, when changing a tool with an integrated capacitive electroacoustic Converter and secondary part of a transformer, is made possible.
  • a winding ratio of 1: 1 is required to minimize the size of the transformer advantageous.
  • the small number of windings also results from the feed frequency in the Range from 20 to 35kHz.
  • the mass of the ferromagnetic inner transformer core acts as an oscillating one Mass and can be used to balance the vibrating mechanical system become.
  • This inner transformer core made of layered and against each other is advantageous electrically insulated slats, which are used to avoid eddy current losses follow the magnetic field lines and piece by piece or non-cutting are reshaped.
  • the capacitive electroacoustic transducer along the tool axis is also advantageous arranged so that the vibration amplitude occurring in the direction of the tool axis increases the abrasive material removal by local axial pressure increase.
  • the amplitude of the longitudinal vibrations of the tool is advantageous capacitive electroacoustic transducers arranged in a vibration node.
  • an ultrasonic adapter 1 has a rotating movement of a tool 2 about a tool axis A generating, not fully shown tool 3 a rotatable capacitive electroacoustic transducer 4 connected to the Secondary winding 5 of a rotatable transformer 6, the primary winding 7 with a powerful ultrasound frequency generator 8 is connected in the ultrasound range, the secondary winding 5 parallel to the capacitive electroacoustic transducer 4 is switched.
  • Tool 2 is a hollow core bit for cut-off grinding cylindrical core bores in rock 9 and via a drilling fluid channel 10 along the tool axis A with the tool device 3.
  • the transformer 6 consists of two U-shaped shell cores assigned to each other with respect to the opening, which coils are assigned in a rotationally fixed manner and oriented parallel to the tool axis A include, wherein the coil designed as primary winding 7 with the tool 3 non-rotatably connected stator and the coil designed as a secondary winding 5 with is associated with the tool 2 rotatably connected rotor.
  • the compact one Transformer 6 has a hollow U-shaped arrangement arranged radially from the inside out Shell core as inner transformer core 11, the secondary winding 5, an air gap 12, the Primary winding 7 and an annular U-shaped shell core as the outer Transformer core 13 on.
  • the ring-shaped hollow capacitive electroacoustic transducer 4 is axially in the direction of the tool device 3 adjacent to the inner transformer core 11 and the secondary winding 5 arranged, whereby the mass thereof in the mechanical Tool 2 resonant circuit is received.
  • an electrical resonant circuit with respect to an alternating current i 2 and an alternating voltage u 2 has the inductance L P formed by a coil, the capacitance C P formed by the capacitive electroacoustic transducer and the resistance R P determined by the losses.
  • this electrical resonant circuit is coupled to a mechanical resonant circuit with regard to a displacement speed v and a displacement force F.
  • the mechanical resonant circuit is described by the internal damping d, the rigidity 1 / c and the mass m and the damping load d L.
  • the inductance L P is replaced for the inductive energy transmission with the secondary side of a transformer fed with an alternating current i 1 and an alternating voltage u 1 .
  • U 2 1000V
  • I 2 2A
  • ü 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Drilling And Boring (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Transducers For Ultrasonic Waves (AREA)
EP01810469A 2000-05-23 2001-05-14 Outil avec adapteur ultrason Expired - Lifetime EP1157752B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10025352 2000-05-23
DE10025352A DE10025352B4 (de) 2000-05-23 2000-05-23 Werkzeuggerät mit einem Ultraschalladapter

Publications (3)

Publication Number Publication Date
EP1157752A2 true EP1157752A2 (fr) 2001-11-28
EP1157752A3 EP1157752A3 (fr) 2004-05-26
EP1157752B1 EP1157752B1 (fr) 2008-03-19

Family

ID=7643142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01810469A Expired - Lifetime EP1157752B1 (fr) 2000-05-23 2001-05-14 Outil avec adapteur ultrason

Country Status (5)

Country Link
US (1) US6731047B2 (fr)
EP (1) EP1157752B1 (fr)
JP (1) JP4917215B2 (fr)
CN (1) CN1219602C (fr)
DE (2) DE10025352B4 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1422034A1 (fr) * 2002-11-19 2004-05-26 Siemens Aktiengesellschaft Procédé d'usinage d'une pièce
WO2010091821A1 (fr) * 2009-02-10 2010-08-19 Sauer Ultrasonic Gmbh Interface pour un actionneur d'outil ou pour un outil, en particulier destiné à être relié à une machine-outil
WO2012163919A3 (fr) * 2011-05-30 2013-01-24 Herrmann Ultraschalltechnik Gmbh & Co. Kg Dispositif de soudure par ultrasons comprenant un coupleur rotatif
DE102012106382A1 (de) * 2012-07-16 2014-01-16 Herrmann Ultraschalltechnik Gmbh & Co. Kg Ausgangsstufe

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* Cited by examiner, † Cited by third party
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DE102009008227C5 (de) * 2009-02-10 2016-10-13 Sauer Ultrasonic Gmbh Schnittstelle für einen Werkzeugaktor bzw. für ein Werkzeug, insbesondere zum Verbinden mit einer Werkzeugmaschine
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US20030001456A1 (en) 2003-01-02
EP1157752A3 (fr) 2004-05-26
EP1157752B1 (fr) 2008-03-19
CN1219602C (zh) 2005-09-21
US6731047B2 (en) 2004-05-04
DE10025352B4 (de) 2007-09-20
DE10025352A1 (de) 2001-12-06
DE50113742D1 (de) 2008-04-30
JP4917215B2 (ja) 2012-04-18
CN1324713A (zh) 2001-12-05

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