DE3317045A1 - METHOD AND ARRANGEMENT FOR THE CONSTANT POWER DELIVERY OF ULTRASONIC CLEANING SYSTEMS - Google Patents
METHOD AND ARRANGEMENT FOR THE CONSTANT POWER DELIVERY OF ULTRASONIC CLEANING SYSTEMSInfo
- Publication number
- DE3317045A1 DE3317045A1 DE19833317045 DE3317045A DE3317045A1 DE 3317045 A1 DE3317045 A1 DE 3317045A1 DE 19833317045 DE19833317045 DE 19833317045 DE 3317045 A DE3317045 A DE 3317045A DE 3317045 A1 DE3317045 A1 DE 3317045A1
- Authority
- DE
- Germany
- Prior art keywords
- generator
- ultrasonic
- frequency
- ultrasonic cleaning
- vco
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- 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
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits
- B06B1/0223—Driving circuits for generating signals continuous in time
- B06B1/0238—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave
- B06B1/0246—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal
- B06B1/0253—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal taken directly from the generator circuit
-
- 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
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/70—Specific application
- B06B2201/71—Cleaning in a tank
Description
HANS TRAPPENBERG · p'ät£>mtfG*rNιευR" KarlsruheHANS TRAPPENBERG · p'ät £> mtfG * rNιευR "Karlsruhe
EUROPÄISCHER PATENTVERTRETEREUROPEAN PATENT AGENT
-3 --3 -
06.05.1983 n8
WT 042305/06/1983 n8
WT 0423
Martin WALTER, Ultraschalltechnik GmbH
Erlenweg 14, 7516 Karlsbad-AuerbachMartin WALTER, Ultrasound Technology GmbH
Erlenweg 14, 7516 Karlsbad-Auerbach
Verfahren und Anordnung zur konstanten
Leistungsabgabe von Ultraschall-Reinigungsanlagen Method and arrangement for constant
Power output of ultrasonic cleaning systems
Die Erfindung betrifft ein Verfahren zur Konstanthaltung
der Leistungsabgabe von Ultraschall-Reinigungsanlagen mit
' einem (oder mehreren) auf die Reinigungsflüssigkeit einwirkenden
SchalliAiandler (Schwinger), der von einem Ultraschall-Generator
(HF-Generator) gespeist wird, sowie eine
Anordnung zur Durchführung der Verfahrens.The invention relates to a method for keeping constant
the power output of ultrasonic cleaning systems
'one (or more) acoustic transducers (oscillators) which act on the cleaning liquid and which are fed by an ultrasonic generator (HF generator), as well as a
Order to carry out the procedure.
Die Ultraschall-Reinigung findet grundsätzlich in einer
Flüssigkeit statt, die sowohl auf das Material wie auch die Struktur des Reinigungsgutes, als auch auf die Art der Verschmutzung abgestimmt sein muß. Zur Reinigung ausgenutzt
werden hierbei die im Flüssigkeitsbad auftretenden hohen
Zug- und Druckkräfte, die Kavitation bewirken, die wiederum die Schmutzpartikel von dem Reinigungsgut löst. Diese hohenThe ultrasonic cleaning basically takes place in one
Liquid instead, which must be matched to both the material and the structure of the items to be cleaned, as well as the type of soiling. Used for cleaning
the high ones that occur in the liquid bath become
Tensile and compressive forces that cause cavitation, which in turn loosens the dirt particles from the items to be cleaned. These high
-2--2-
Zuq- und Druckkräfte beziehungsweise das Maximum der Kavitation werden allerdings nur dann erreicht, wenn das gesamte System in Resonanz ist. Die Resonanzbedingungen verschieben sich jedoch sehr stark unter dem Einfluß von Änderungen der verschiedensten Parameter, angefangen von Netz-Spannungsschwankungen, bis zu Temperaturänderungen. Dies bedeutet, daß ein für eine bestimmte Leistung ausgelegtes System diese Leistung nur ausnahmsweise erreichen wird beziehungsweise daß auch die erstrebte Reinigungsleistung nur unter penibler Einhaltung der einzelnen Parameter-Grenzwerte zu erzielen ist. Dies wiederum würde einen sehr hohen apparativen und Bedienungsaufwand erfordern, so daß die Wirtschaftlichkeit derartiger Ultraschall-Reinigungsanlagen nicht mehr gewährleistet wäre. In der Praxis werden daher derartige Ultraschall-Reinigungsanlagen stets überdimensioniert, um auch unter ungünstigen Bedingungen noch eine genügende Reinigungswirkung zu erzielen. Dies bedeutet jedoch auch, daß die angestrebte Reinigungswirkung mehr oder weniger dem Zufall überlassen bleibt, daß also die Wirkung der Reinigungsanlage zwischen den beiden Extremen - einerseits zu geringe Reinigungswirkung, andererseits Schädigung des Reinigungsutes - schwanken kann und wird. Zu geringe Reinigungswirkung kann beispielsweise bereits bei einer Absenkung der Netzspannung, eine Schädigung bei erhöhter Netzspannung eintreten. Hinzu kommen dann noch weitere, sich zur Minus- oder Plusseite addierende Imponderabilien, wie die mit dem Eintauchen des Reinigungsgutes verbundene Füllstandsänderunq, die gleichzeitige Impedanzänderung durch das Einbringen des Reiniqunqsgutes, Viskositätsänderungen, Temperaturänderunqen und dergleichen.Zuq- and pressure forces or the maximum of cavitation are only achieved if the entire system is in resonance. Shift the resonance conditions however, very much under the influence of changes in the various parameters, from mains voltage fluctuations to temperature changes. This means, that a system designed for a certain performance will or will only achieve this performance in exceptional cases that the desired cleaning performance can only be achieved with meticulous compliance with the individual parameter limit values is to achieve. This in turn would require a very high outlay in terms of equipment and operation, so that the economy such ultrasonic cleaning systems would no longer be guaranteed. In practice, therefore, such Ultrasonic cleaning systems are always oversized so that they still have a sufficient one even under unfavorable conditions To achieve cleaning effect. However, this also means that the desired cleaning effect more or less the It is left to chance that the effect of the cleaning system lies between the two extremes - on the one hand, too poor cleaning effect, on the other hand damage to the items to be cleaned - can and will fluctuate. Too little cleaning effect For example, if the mains voltage drops, damage can be caused by an increased mains voltage enter. In addition, there are other imponderables that add up to the minus or plus side, such as the level change associated with immersing the items to be cleaned, the simultaneous change in impedance due to the introduction of the cleaning material, changes in viscosity, Temperature changes and the like.
Aufgabe der Erfindung ist es, ein Verfahren und eine Anordnunq zur Durchführung des Verfahrens anzugeben, das die gleichbleibende, einstellbare Leistungsabgabe einer solchen Ultrascha 11-Reinirjunqsanlage gewährleistet.The object of the invention is to provide a method and an arrangement for performing the method, which the constant, adjustable power output of such an ultrasonic cleaning system is guaranteed.
-3--3-
Erreicht wird dies nach der Erfindung dadurch, daß die Generatorfrequenz in Abhängigkeit von der Leistungsaufnahme des Wandlers geregelt wird.This is achieved according to the invention in that the Generator frequency depending on the power consumption of the converter is regulated.
Nicht mehr also wie bisher wird die Anlage stets im maximalen Arbeitspunkt betrieben, sondern dieser maximale Arbeitspunkt, also die Resonanzfrequenz, wird nur frequenz-,mäßig dann eingeregelt, wenn diese Leistung gefordert und auch durch die oben angeführten Parameter bedingt, möglich ist. In allen anderen Fällen arbeitet die Anlage außerhalb dieser maximalen Resonanzfrequenz, jedoch, wie angesrebt, ""1S stets auf dem gleichen, einstellbaren Leistungsniveau. Damit bleibt die Leistungsabgab der Ultraschall-Reinigungsanlage nicht mehr dem Zufall überlassen, sondern ist exakt definierbar und, im gegebenen Rahmen, einstellbar. Unabhängig also von den verschiedenen Einwirkungen, wie Füllstands-, Viskositäts-, Temperatur- oder Spannungsschwankungen etc. wird sich immer die gleiche gewünschte Leistungsabgabe ergeben. Hervorzuheben ist, daß durch diese Art der Leistungsregelung keinerlei Verluste durch Vorsenaitwiderstände etc. entstehen und auch, daß die Nachrege lung bei einer Änderung eines oder mehrerer Parameter praktisch verzögerungsfrei erfolgt.The system is no longer always operated at the maximum operating point, as before, but this maximum operating point, i.e. the resonance frequency, is only regulated to a moderate degree when this performance is required and is also possible due to the parameters listed above. In all other cases, the system works outside of this maximum resonance frequency, but, as intended, "" 1 S always at the same adjustable power level. This means that the power output of the ultrasonic cleaning system is no longer left to chance, but can be precisely defined and, within the given framework, adjustable. Regardless of the various influences, such as level, viscosity, temperature or voltage fluctuations, etc., the same desired power output will always result. It should be emphasized that this type of power control does not result in any losses from Vorsenaitwideratoren etc. and also that the readjustment takes place practically without delay when one or more parameters are changed.
Zur Durchführung dieser Leistungsregelung wird nach der Erfindung vorgeschlagen, zwischen den Generator, dessen Ultraschallfrequenz mittels eines VCO (voltage controlled oscillator) bestimmt wird und dem Wandler eine Wirkleistungs-Meßeinrichtung zur Bildung des Istwertes einzufügen und dieser Heßeinrichtung einen Differenzverstärker nachzuschalten, dem zudem über ein Stellglied ein stabilisierter Sollwert zune.führt wird, desse.n Ausganqsspannunq, also die verstärkte Differenz zwischen Istwert und Sollwert, sodann den VCO steuert. Der Sollwert kann hierbei in üblicher Weise durch eine steuerbare, stabilisierte Gleichspannunci oder eine entsprecht finde pulsierende GleichspannunoTo carry out this power control is proposed according to the invention, between the generator, its Ultrasonic frequency is determined by means of a VCO (voltage controlled oscillator) and the converter an active power measuring device to create the actual value and insert a differential amplifier into this measuring device downstream, which is also supplied with a stabilized setpoint value via an actuator, the output voltage of which is that is, the increased difference between the actual value and the setpoint value, then controls the VCO. The setpoint can be set in Usually by means of a controllable, stabilized DC voltage or find a corresponding pulsating DC voltage
rsaichträgHch geändertReasonableHch changed
Auf der Zeichnung ist ein Blockschaltbild der gekennzeichneten Anordnung (Fig. 1) sowie ein Frequenz/Leistungsdiagramm (Fig. 2) dargestellt.On the drawing is a block diagram of the marked Arrangement (Fig. 1) and a frequency / power diagram (Fig. 2) shown.
Ein mit Netzspannung 1 betriebener Ultraschallgenerator 2 weist als Frequenzgeber einen VCO 3 auf. Zwischen diesem Ultraschallgenerator 2 und einem Ultraschall-Wandler 4 ist eine Leistungs-Meßeinrichtung 5 eingefügt, deren Signal einem Differenzverstärker 6 zugeleitet wird. Dieses Signal stellt den "Istwert" dar; andererseits wird dem Differenzverstärker ein Sollwert 7 zugeführt, also eine stellbare, stabilisierte Gleichspannung. Die verstärkte Differenzspannung, also die Ausgangsspannung des Differenzverstärkers 6, bildet sodann die Steuerspannung für den VCO 3.An ultrasonic generator 2 operated with mains voltage 1 has a VCO 3 as a frequency generator. Between this Ultrasonic generator 2 and an ultrasonic transducer 4, a power measuring device 5 is inserted, the signal a differential amplifier 6 is fed. This signal represents the "actual value"; on the other hand is the differential amplifier a nominal value 7 is supplied, that is to say an adjustable, stabilized direct voltage. The amplified differential voltage, so the output voltage of the differential amplifier 6, then forms the control voltage for the VCO 3.
Die in Fig. 2 in dem Leistungs/Frequenzdiagramm gezeigten Kurven entsprechen den Leistungskurven der Reinigungsanlage bei verschiedenen Betriebszuständen. Die niedrigste Kurve ergibt sich bei erschwerten Betriebsbedingungen, also beispielsweise niedrige Temperatur, ungünstiger Füllstand, niedrige Netzspannung etc., die höchste Kurve bei entsprechend positiven Parametern. Gemeinsam ist sämtlichen Kurven die Resonanzfrequenz f . Es ist unmittelbar aus diesemThe curves shown in the performance / frequency diagram in FIG. 2 correspond to the performance curves of the cleaning system in different operating states. The lowest curve occurs under difficult operating conditions, for example low temperature, unfavorable level, low mains voltage, etc., the highest curve at positive parameters. Common to all curves is the resonance frequency f. It is immediately from this
Diagramm ersichtlich, daß bei Einhalten dieser Resonanzfrequenz sich jeweils unterschiedliche Leistungen ergeben, also auch unterschiedliche Reiniqungswirkungen. Nach der Erfindung hingegen wird, um eine konstante Leistungsabgabe beizubehalten, die Frequenz tiefer (oder höher) geregelt, im Beispiel der Kurve 8 auf die Frequenz f., in demjenigen der Kurve 9 auf die Frequenz f„.It can be seen in the diagram that if this resonance frequency is adhered to, different performances result in each case, thus also different cleaning effects. After In contrast to the invention, in order to maintain a constant power output, the frequency is regulated lower (or higher), in the example of curve 8 to the frequency f., in that of curve 9 to the frequency f ".
-5--5-
Durch'die nach der Erfindung gegebene Regelung ist damit
nicht nur gewährleistet, daß stets die Leistungsabgabe der Reinigungsanlage konstant gehalten wird, sondern auch, daß
durch eine zu hohe Leistungsaufnahme - Kurve 9 in Resonanzfrequenz
- der Ultraschallgenerator 2, wie auch der Ultraschall-Wandler 4 überlastet wird oder Schädigungen am Reinigungsgut
entstehen.By'die given according to the invention control is thus
not only ensures that the power output of the cleaning system is kept constant, but also that excessive power consumption - curve 9 in resonance frequency - overloads the ultrasonic generator 2 and the ultrasonic transducer 4 or damages the items to be cleaned.
- Leerseite -- blank page -
Claims (2)
WT 042305/06/1983 n8
WT 0423
Erlenweg 14, 7516 Karlsbad-AuerbachMartin WALTER, Ultrasound Technology GmbH
Erlenweg 14, 7516 Karlsbad-Auerbach
Ultraschall-Reinigungsanlagen mit einem (oder mehreren) auf die Reinigungsflüssigkeit einwirkenden Schallwandler
(Schwinger), der von einem Ultraschall-Generator (HF-Generator) gespeist wird,Iy procedure to keep the power output of
Ultrasonic cleaning systems with one (or more) sound transducers acting on the cleaning liquid
(Transducer) fed by an ultrasonic generator (HF generator),
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833317045 DE3317045A1 (en) | 1983-05-10 | 1983-05-10 | METHOD AND ARRANGEMENT FOR THE CONSTANT POWER DELIVERY OF ULTRASONIC CLEANING SYSTEMS |
| EP84109748A EP0172263A1 (en) | 1983-05-10 | 1984-08-16 | Method and arrangement to maintain constant the power delivery of an ultrasonic cleaning system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833317045 DE3317045A1 (en) | 1983-05-10 | 1983-05-10 | METHOD AND ARRANGEMENT FOR THE CONSTANT POWER DELIVERY OF ULTRASONIC CLEANING SYSTEMS |
| EP84109748A EP0172263A1 (en) | 1983-05-10 | 1984-08-16 | Method and arrangement to maintain constant the power delivery of an ultrasonic cleaning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3317045A1 true DE3317045A1 (en) | 1984-11-15 |
Family
ID=25810673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19833317045 Ceased DE3317045A1 (en) | 1983-05-10 | 1983-05-10 | METHOD AND ARRANGEMENT FOR THE CONSTANT POWER DELIVERY OF ULTRASONIC CLEANING SYSTEMS |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0172263A1 (en) |
| DE (1) | DE3317045A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0254237A2 (en) * | 1986-07-25 | 1988-01-27 | Herbert Gässler | Method for phase controlled power- and frequency adjustement of an ultrasonic transducer and apparatus for application of the method |
| EP0319631A1 (en) * | 1987-11-09 | 1989-06-14 | Emerson Electric Co. | Method of controlling an ultrasonic generator |
| DE3840583A1 (en) * | 1988-12-02 | 1990-06-07 | Volker Ulrich Boehringer | Process for the non-contact, eruptive removal of sediment and other deposits |
| US5305737A (en) * | 1988-03-30 | 1994-04-26 | Arjo Inc. | Ultrasonic treatment system |
| DE19531360A1 (en) * | 1994-10-31 | 1996-05-02 | Hewlett Packard Co | Transducer sensitivity control device for ultrasonic imaging system |
| US5665141A (en) * | 1988-03-30 | 1997-09-09 | Arjo Hospital Equipment Ab | Ultrasonic treatment process |
| DE102005030777B4 (en) * | 2005-07-01 | 2016-10-20 | Martin Walter Ultraschalltechnik Ag | Method and circuit arrangement for operating an ultrasonic vibrator |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4687962A (en) * | 1986-12-15 | 1987-08-18 | Baxter Travenol Laboratories, Inc. | Ultrasonic horn driving apparatus and method with active frequency tracking |
| US4942868A (en) * | 1988-03-30 | 1990-07-24 | Malmros Holding, Inc. | Ultrasonic treatment of animals |
| US5900690A (en) * | 1996-06-26 | 1999-05-04 | Gipson; Lamar Heath | Apparatus and method for controlling an ultrasonic transducer |
| JP2002248153A (en) * | 2001-02-23 | 2002-09-03 | Matsushita Electric Works Ltd | Ultrasonic cosmetic device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3975650A (en) * | 1975-01-30 | 1976-08-17 | Payne Stephen C | Ultrasonic generator drive circuit |
| GB2099594B (en) * | 1981-05-16 | 1985-02-27 | Hilbre Ultrasonics Ltd | Indicating power developed by ultrasonic transducer |
-
1983
- 1983-05-10 DE DE19833317045 patent/DE3317045A1/en not_active Ceased
-
1984
- 1984-08-16 EP EP84109748A patent/EP0172263A1/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0254237A2 (en) * | 1986-07-25 | 1988-01-27 | Herbert Gässler | Method for phase controlled power- and frequency adjustement of an ultrasonic transducer and apparatus for application of the method |
| EP0254237A3 (en) * | 1986-07-25 | 1989-07-05 | Herbert Gassler | Method for phase controlled power- and frequency adjustement of an ultrasonic transducer and apparatus for application of the method |
| EP0319631A1 (en) * | 1987-11-09 | 1989-06-14 | Emerson Electric Co. | Method of controlling an ultrasonic generator |
| US5305737A (en) * | 1988-03-30 | 1994-04-26 | Arjo Inc. | Ultrasonic treatment system |
| US5665141A (en) * | 1988-03-30 | 1997-09-09 | Arjo Hospital Equipment Ab | Ultrasonic treatment process |
| DE3840583A1 (en) * | 1988-12-02 | 1990-06-07 | Volker Ulrich Boehringer | Process for the non-contact, eruptive removal of sediment and other deposits |
| DE19531360A1 (en) * | 1994-10-31 | 1996-05-02 | Hewlett Packard Co | Transducer sensitivity control device for ultrasonic imaging system |
| US5684243A (en) * | 1994-10-31 | 1997-11-04 | Hewlett-Packard Company | Methods for controlling sensitivity of electrostrictive transducers |
| US5889194A (en) * | 1994-10-31 | 1999-03-30 | Hewlett-Packard Company | Apparatus for controlling the sensitivity of transducer elements of an array |
| DE19531360B4 (en) * | 1994-10-31 | 2004-11-04 | Agilent Technologies, Inc. (n.d.Ges.d.Staates Delaware), Palo Alto | Device and method for controlling the sensitivity of transducers |
| DE102005030777B4 (en) * | 2005-07-01 | 2016-10-20 | Martin Walter Ultraschalltechnik Ag | Method and circuit arrangement for operating an ultrasonic vibrator |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0172263A1 (en) | 1986-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1140474B1 (en) | Method for keeping constant the mean gap width between a sonotrode of an ultrasound system and a tool configured as a counter surface and forming part of an ultrasonic cutting device | |
| DE3317045A1 (en) | METHOD AND ARRANGEMENT FOR THE CONSTANT POWER DELIVERY OF ULTRASONIC CLEANING SYSTEMS | |
| DE3002510A1 (en) | ULTRASONIC PROCESSING METHOD AND DEVICE | |
| CH614395A5 (en) | Device and process for treating flowable materials with ultrasonic longitudinal oscillations | |
| DE4121148A1 (en) | ULTRASONIC DEVICE WITH AMPLITUDE CONTROL UNIT | |
| EP0702109A2 (en) | Process and apparatus for continuously coating of a web | |
| DE2155176A1 (en) | Method for stirring liquid dispersions and apparatus therefor | |
| DE10085264B4 (en) | Wire discharge machining method and apparatus | |
| DE10200680A1 (en) | Minimal vibration excitation when moving with jerk limitation by adapting jerk profiles | |
| DE2258429A1 (en) | METHOD AND APPARATUS FOR MEASURING THE VISCOSITY OF A LIQUID OR THE CONCENTRATION OF FINE SOLID MATTERS IN A LIQUID | |
| DE102006020417B4 (en) | Device for processing workpieces by means of ultrasound | |
| EP0711626A1 (en) | Device for the ultrasonic machining of a workpiece | |
| DE69923891T2 (en) | Elliptic vibration cutting method and elliptical vibration cutting device | |
| DE2848472A1 (en) | PROCESS AND SYSTEM FOR VIBRATING A BODY IN A SELECTED VIBRATION MODE | |
| DE7707983U1 (en) | DEVICE FOR GENERATING ULTRASONIC WAVES | |
| DE102005030777B4 (en) | Method and circuit arrangement for operating an ultrasonic vibrator | |
| WO2017129415A1 (en) | Method for exciting piezoelectric transducers and sound-producing arrangement | |
| DE112015006610T5 (en) | Atomic force microscope and control method for it | |
| EP1825931B1 (en) | Method for operating a dental ultrasonic device and dental ultrasonic device | |
| EP2011577A2 (en) | Method for operating a dental ultrasonic device and dental ultrasonic device | |
| DE2606997A1 (en) | Ultrasonic speed transformer with stepped concentrator - has rod of resonant length according to mode of longitudinal oscillation | |
| DE102019106694A1 (en) | Method for the detection of a sonotrode coming into or out of contact with a counter-element | |
| CH518749A (en) | Device for transmitting mechanical energy to a load | |
| EP3606677B1 (en) | Ultrasonic machine tool comprising two sonotrodes and method for operating same | |
| DE2607038A1 (en) | Ultrasonic speed transformer with stepped concentrator - has variable-section core acoustically connected to concentrator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8131 | Rejection |