EP2564997B1 - Sonotrode et dispositif de commande et de surveillance de procédés de coupe à base d'ultrasons - Google Patents

Sonotrode et dispositif de commande et de surveillance de procédés de coupe à base d'ultrasons Download PDF

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Publication number
EP2564997B1
EP2564997B1 EP12177226.3A EP12177226A EP2564997B1 EP 2564997 B1 EP2564997 B1 EP 2564997B1 EP 12177226 A EP12177226 A EP 12177226A EP 2564997 B1 EP2564997 B1 EP 2564997B1
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EP
European Patent Office
Prior art keywords
sonotrode
measuring
cutting
controlling
control
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.)
Active
Application number
EP12177226.3A
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German (de)
English (en)
Other versions
EP2564997A1 (fr
Inventor
Peter Solenthaler
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.)
Telsonic Holding AG
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Telsonic Holding AG
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Publication date
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting

Definitions

  • the present invention relates to a sonotrode and to the control and cutting control of cutting operations in ultrasound-based articles or workpieces.
  • ultrasonic cutting devices For a variety of applications in the industry, it is known to use ultrasonic cutting devices to To achieve as precise as possible cuts in workpieces or objects. For example, in the automotive industry, plastics are often processed with ultrasonic cutting devices. But also in the food sector ultrasonic cutting devices are used to produce high quality end products.
  • Such ultrasonic cutting devices have an ultrasonic generator or ultrasound device and a tool part called a sonotrode.
  • the sonotrode can be coupled to the ultrasound device, and the sonotrode is acted upon by a control unit with a high-frequency oscillation in the ultrasonic range.
  • the devices known today for this purpose use sonotrodes in respectively adapted special forms, depending on the machining task.
  • the tools (sonotrodes) that can be applied to the workpiece or objects are conventionally made of metallic materials such as steel, aluminum or titanium.
  • One difficulty with such devices is that the control and control of the cutting process is quite difficult to achieve in certain situations and applications.
  • the parameters of the ultrasonic cutting device must be adjusted accordingly.
  • the strength of the vibration generation as well as the contact pressure have to be adapted with complex adjusting devices.
  • the service lives of the cutting devices are often reduced in the conventional present day metallic sonotrodes due to the continuous contact of the sonotrode with the workpieces and the associated wear of the sonotrode.
  • Such a conventional apparatus for ultrasonic cutting is, for example, in DE 195 32 499 A1 disclosed.
  • the sonotrode of this known device comprises an ultrasound head, which has a working blade of a hard metal, which comes into contact with the operation of the device with a counter-holder for cutting webs.
  • a shaft with a thickened collar is provided here on the sonotrode.
  • the present invention is based on the object, a device for ultrasonic cutting and a sonotrode for such a device To propose that allows greater flexibility in the application and better control and control of the cutting process. In addition, the service life of the device should be increased.
  • the device according to the invention has at least one ultrasound device which can be coupled with one or more sonotrodes for cutting workpieces or articles on ultrasound basis, wherein the sonotrode has a sonotrode body, which is in each case specially adapted to the processing task in its shape and design, and a control unit ,
  • the device according to the invention is characterized in that the sonotrode body consists at least in sections of an electrically conductive ceramic material.
  • the ceramic material also has the advantage that an otherwise given wear during the cutting process is significantly reduced.
  • the downtime of the device can thus be increased, and at the same time additional new and improved types of control can be implemented.
  • the device according to the invention are thus achieved in a surprisingly simple way two equal technically different directions improvements: First, the control and control of the cutting process is optimized without additional design effort, and on the other hand, the life of the devices considerably compared to the prior Technology known devices with metallic sonotrodes increased.
  • a support or an anvil is provided as a counterpart to the sonotrode, which likewise consists at least in sections of an electrically conductive ceramic material.
  • the sonotrode which likewise consists at least in sections of an electrically conductive ceramic material.
  • means for measuring an electrical resistance at the sonotrode are provided in the control device. With the detection of electrical resistance can be measured almost directly when cutting the contact resistance of the ceramic sonotrode. These measurements can be used advantageously for optimized control and control of the cutting operation in the apparatus, in particular in the case of parameters changing during the course of the cutting, such as material type or thickness of the workpieces.
  • An advantageous embodiment of the invention provides that in the control means are provided for measuring an electrical resistance between the sonotrode and the mating piece-forming support.
  • the electrical resistance between the overlay and the sonotrode can also be used for optimized control and control of cutting with the ultrasonic cutter.
  • control unit of the device is adapted for controlling and controlling the cutting process based on a measured value of a contact resistance of the sonotrode.
  • the electrical contact resistance can be detected directly via the sonotrode and the support due to the conductivity of their material.
  • the control unit has correspondingly adapted circuits in order to process the measured value thus acquired and to use it for the control and regulation of the ultrasonic cutting.
  • a closed circuit for measuring, controlling and controlling the cutting process is constructed between the control unit, the sonotrode and the counterpiece forming support. It forms both the sonotrode and the edition their conductive material part of the closed circuit. This is possible because of their conductivity according to the invention.
  • the invention also relates to a sonotrode for ultrasound-based processing machines with the features of claim 1.
  • the sonotrode is characterized in that a sonotrode body is provided, which consists at least in sections of an electrically conductive ceramic material.
  • the sonotrode has thus over conventional metal sonotrodes less wear and tear over time on. With it, therefore, longer service life can be achieved.
  • both control and control can be further improved, since measurements of electrical quantities can be made with the sonotrode itself, as a special, electrically conductive ceramic is used for the production of the sonotrode.
  • the sonotrode body is made entirely of an electrically conductive ceramic material.
  • the sonotrode has a shape specially adapted to the machining task, for example a rotationally cylindrical shape or a shape of a cutting tool or the like.
  • the material for the sonotrode of the material designated TSN-CS14E is used as the material for the sonotrode of the material designated TSN-CS14E. Investigations by the inventor have shown that this material is particularly well suited for the realization of electrical control tasks and for the reduction of wear and tear when cutting workpieces and objects.
  • the sonotrode has a measuring sensor for measuring a specific electrical resistance.
  • the sensor can be attached to the sonotrode or integrated directly into the material of the sonotrode during manufacture.
  • a sonotrode of a conductive ceramic material is used, which is made entirely of this material.
  • the sonotrode can consist only in sections of such a material, for example, if only a selective collection or introduction of electrical current or other sizes is desired.
  • the counter-tool namely the support or the anvil, is also produced as a whole from the electrically conductive ceramic material in the embodiment of the invention. In this way, a closed circuit is realized between the sonotrode and the support.
  • the ceramic material having electrical conductivity the material designated TSN-CS14E is preferably used.
  • this material gives a surprisingly good solution, on the one hand, with regard to the service lives and also with regard to the control and monitoring options based on measured or introduced electrical currents or other electrical quantities.
  • This material is very low-resistance conductive and is therefore particularly well suited to a touch of the two tool parts of the ultrasonic cutting device, namely the sonotrode and the requirement to be able to measure and regulate. In this way, not only the service life of the sonotrodes over the previously known sonotrodes in the prior art are significantly extended. Also, new and improved control and monitoring operations can be implemented, thus improving overall cut control.
  • the applications and the adjustment options are thus significantly increased in the device and sonotrode invention.
  • the device according to the invention is more flexible than the previously known devices, and longer service lives are possible when cutting a wide variety of workpieces and objects.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (9)

  1. Sonotrode destinée à des machines d'usinage à base d'ultrasons, notamment un dispositif de découpe, caractérisée en ce qu'un corps de sonotrode est prévu, lequel est constitué au moins partiellement d'un matériau céramique électro-conducteur.
  2. Sonotrode selon la revendication 1, caractérisée en ce que le corps de sonotrode est totalement constitué d'un matériau céramique électro-conducteur.
  3. Sonotrode selon l'une des revendications 1 à 2, caractérisée en ce que la sonotrode présente une sonde de mesure pour la mesure d'une résistance électrique.
  4. Dispositif destiné à la commande et au contrôle de découpes dans des objets ou des pièces d'usinage, lesquelles sont élaborées au moyen d'oscillations mécaniques de haute fréquence, doté d'une sonotrode selon l'une des revendications précédentes, ainsi que d'un dispositif à ultrasons qui peut être couplé avec une ou plusieurs sonotrodes, où la(les) sonotrode(s) présente(nt) un corps de sonotrode qui est spécialement adapté à la tâche de façonnage et à l'objet, respectivement à la pièce à usiner, et une unité de commande est prévue.
  5. Dispositif selon la revendication précédente, caractérisé en ce qu'un revêtement est prévu en tant que pièce complémentaire pour la sonotrode, lequel est constitué au moins partiellement d'un matériau céramique électro-conducteur.
  6. Dispositif selon l'une des revendications précédentes 4 ou 5, caractérisé en ce que des moyens destinés à la mesure d'une résistance électrique sont prévus sur la sonotrode.
  7. Dispositif selon l'une des revendications précédentes 4 à 6, caractérisé en ce que des moyens destinés à la mesure d'une résistance électrique sont prévus entre la sonotrode et le revêtement.
  8. Dispositif selon l'une des revendications précédentes 4 à 7, caractérisé en ce que l'unité de commande est adaptée à la régulation et au contrôle du processus de découpe sur la base d'une valeur de mesure d'une résistance électrique de contact de la sonotrode, laquelle est mesurable lors du contact avec le revêtement.
  9. Dispositif selon l'une des revendications précédentes 4 à 8, caractérisé en ce qu'entre l'unité de commande, la sonotrode et le revêtement formant la pièce complémentaire, un circuit électrique fermé est établi pour la mesure, le contrôle et la commande du processus de découpe.
EP12177226.3A 2011-08-29 2012-07-20 Sonotrode et dispositif de commande et de surveillance de procédés de coupe à base d'ultrasons Active EP2564997B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011081747A DE102011081747A1 (de) 2011-08-29 2011-08-29 Vorrichtung und Sonotrode zur Steuerung und Überwachung von Schneidvorgängen auf Ultraschallbasis

Publications (2)

Publication Number Publication Date
EP2564997A1 EP2564997A1 (fr) 2013-03-06
EP2564997B1 true EP2564997B1 (fr) 2018-10-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12177226.3A Active EP2564997B1 (fr) 2011-08-29 2012-07-20 Sonotrode et dispositif de commande et de surveillance de procédés de coupe à base d'ultrasons

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EP (1) EP2564997B1 (fr)
DE (1) DE102011081747A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015220875A1 (de) * 2015-10-26 2017-04-27 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung und Verfahren zum Ultraschallschneiden von Werkstücken
DE102017212326A1 (de) * 2017-07-19 2019-01-24 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Herstellen eines Metallbauteils sowie Metallbauteil

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1207123B (de) * 1963-08-02 1965-12-16 Alcatel Sa Verbundvibrator fuer Schweiss- oder Ultraschallbearbeitungsgeraete mit piezoelektrischen Keramikscheiben
DE4203827A1 (de) * 1992-02-10 1993-08-12 Krauss Maffei Ag Verfahren und vorrichtung zum herstellen laminierter formteile
DE19532499A1 (de) * 1995-09-02 1997-03-06 Vaupel Textilmasch Vorrichtung zum Ultraschall-Schneiden und/oder Ultraschall-Schweißen von Bahnen, insbesondere textilen Breitgewebe-Bahnen
DE50110642D1 (de) * 2000-12-01 2006-09-14 Schunk Ultraschalltechnik Gmbh Vorrichtung zum verbinden von gegenständen sowie werkzeug
DE102008056721B4 (de) * 2008-11-07 2011-06-22 Technische Universität Dresden, 01069 Verfahren zur reproduzierbaren Herstellung keramischer Formkörper
EP2283993A3 (fr) * 2009-08-05 2012-08-01 Telsonic Holding AG Dispositif de soudure de joints de tête de sachets tubulaires

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2564997A1 (fr) 2013-03-06
DE102011081747A1 (de) 2013-02-28

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