EP0594541B1 - Sonotrode for an ultrasound processing apparatus - Google Patents
Sonotrode for an ultrasound processing apparatus Download PDFInfo
- Publication number
- EP0594541B1 EP0594541B1 EP93810735A EP93810735A EP0594541B1 EP 0594541 B1 EP0594541 B1 EP 0594541B1 EP 93810735 A EP93810735 A EP 93810735A EP 93810735 A EP93810735 A EP 93810735A EP 0594541 B1 EP0594541 B1 EP 0594541B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sonotrode
- axis
- outlet
- inlet
- tool
- 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.)
- Expired - Lifetime
Links
- 238000002604 ultrasonography Methods 0.000 title claims description 3
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims 1
- 238000003754 machining Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
Definitions
- Ultrasonic processing devices usually consist of e.g. piezoelectric vibration exciter, a coaxial sonotrode and a coaxial tool.
- the sonotrode is a rotationally symmetrical body and acts as a spring-mass system.
- the vibration exciter excites them to longitudinal natural vibrations, which form around a node level.
- the sonotrode often has a larger cross section on the input side than on the output side. As a result, it acts as an amplitude amplifier.
- Such a sonotrode is known from US-A-3,015,961.
- the known ultrasonic devices build relatively long in the direction of the oscillation axis, so that workpieces that are difficult to access are often difficult to machine.
- the present invention has for its object to provide a sonotrode that allows a shorter length in the direction of vibration of the tool. This object is achieved by the combination of features of the claims.
- the vibration exciter 1 consists of a vibration exciter 1 with a piezo-quartz thickness transducer 2 and two metal cylinders 3 connected at the end, an amplifier or booster 4, a sonotrode 5 and a tool 6.
- the vibration exciter is cylindrical and has longitudinal longitudinal harmonic vibrations its axis 10 with a node plane in its axial longitudinal center. The maximum amplitude occurs on the end faces of the vibration exciter 1.
- On one end face is the thicker end face than the body of revolution trained, coaxial amplifier 4 connected.
- the amplifier 4 is preferably tapered towards the other end face and also oscillates longitudinally about a node plane at its natural frequency. The vibration amplitude is increased by the taper.
- the sonotrode 5 is designed as an annular bending oscillator with a cylindrical outer surface 15 and a coaxial, cylindrical inner surface 16.
- the thinner end of the amplifier 4 is screwed into an inlet 17 of the sonotrode, which is designed as an internal thread.
- the input 17 is coaxial to the axis 10 and radially to the cylindrical outer surface 15.
- the output 18 of the sonotrode 5 is designed as a bore into which the tubular tool 6 is firmly connected (for example soldered).
- the output axis 19 is also radial and intersects the input axis 10 at an angle of approximately 90 °.
- a coaxial tube 20 is formed on the sonotrode 4 and communicates with a bore 21 passing through the vibration exciter 1 and the amplifier 4.
- the tube 20 is connected to the axial bore 23 of the tool 6 via a hose 22.
- abrasive can be sucked out of the end face 24 of the tool 6, which acts as a working surface, or can be supplied to this end face 24 through the bore 21, the hose 22 and the hollow tool 6.
- the natural bending frequency of the sonotrode 5 is equal to the longitudinal natural vibration frequency of the amplifier 4 and the vibration exciter 1.
- the sonotrode 5 oscillates around four nodes 33 to 36.
- FIG. 2 shows the oscillation of the neutral fiber of the sonotrode 5. If the cross section of the sonotrode 5 is the same over the entire circumference, the output amplitude 31 of the sonotrode oscillation is equal to the input amplitude 30 (apart from friction losses). As can be seen, the output amplitude is maximum when the output axis 19 is perpendicular to the input axis 10, but the output amplitude is still close to the maximum value when the angle is slight, e.g. Deviates from this value by ⁇ 20 °.
- the ring cross section of the sonotrode 5 increases from the exit 18 on both sides to the diametrically opposite point.
- An advantageous embodiment of this variant is shown in FIG. 3:
- the sonotrode 5 is wedge-shaped when projected in the direction of the input axis 10. As a result, the sonotrode 5 acts as an amplifier and the output amplitude 31 is greater than the input amplitude 30.
- FIG. 4 shows a variant of the sonotrode 5 in which the tool 6 is detachably connected to the sonotrode, for example screwed into a nut thread 18 'from above.
- the tool 6 is detachably connected to the sonotrode, for example screwed into a nut thread 18 'from above.
- an abrasive supply through an additional bore 40 in the amplifier 4 a further hose 41 and an annular nozzle 42 surrounding the tool 6 may be provided.
- the inventive design of the sonotrode 5 as an annular bending oscillator ensures that the tool 6 oscillates at an angle to the axis 10 of the vibration exciter 1 and amplifier 4. This allows workpieces that are difficult to access to be processed efficiently using ultrasound.
- the tool 6 is to vibrate laterally in addition to the longitudinal vibrations, it can be angled.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Saccharide Compounds (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Treatment Of Fiber Materials (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Ultraschall-Bearbeitungsgeräte bestehen meist aus einem z.B. piezoelektrischen Schwingungserreger, einer koaxialen Sonotrode und einem ebenfalls koaxialen Werkzeug. Die Sonotrode ist ein rotationssymmetrischer Körper und wirkt als Feder-Masse-System. Durch den Schwingungserreger wird sie zu longitudinalen Eigenschwinungen angeregt, welche sich um eine Knotenebene ausbilden. Häufig hat die Sonotrode auf der Eingangsseite einen grösseren Querschnitt als auf der Ausgangsseite. Dadurch wirkt sie als Amplitudenverstärker. Eine solche Sonotrode ist aus US-A-3 015 961 bakannt.Ultrasonic processing devices usually consist of e.g. piezoelectric vibration exciter, a coaxial sonotrode and a coaxial tool. The sonotrode is a rotationally symmetrical body and acts as a spring-mass system. The vibration exciter excites them to longitudinal natural vibrations, which form around a node level. The sonotrode often has a larger cross section on the input side than on the output side. As a result, it acts as an amplitude amplifier. Such a sonotrode is known from US-A-3,015,961.
Die bekannten Ultraschall-Geräte bauen in Richtung der Schwingachse relativ lang, so dass schwer zugängliche Werkstücke oft schwierig zu bearbeiten sind.The known ultrasonic devices build relatively long in the direction of the oscillation axis, so that workpieces that are difficult to access are often difficult to machine.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Sonotrode anzugeben, die eine kürzere Baulänge in Schwingrichtung des Werkzeuges ermöglicht. Diese Aufgabe wird durch die Merkmalskombination der Ansprüche gelöst.The present invention has for its object to provide a sonotrode that allows a shorter length in the direction of vibration of the tool. This object is achieved by the combination of features of the claims.
Nachfolgend werden Ausführungsbeispiele der Erfindung anhand der Zeichnung erläutert. Darin zeigt:
- Fig. 1
- einen schematischen Schnitt durch eine Sonotrode mit angeschlossenem Schwingungserreger und Werkzeug,
- Fig. 2
- eine Darstellung der Schwingung der Sonotrode,
- Fig. 3
- eine Ansicht der Sonotrode, und
- Fig. 4
- eine Variante der Sonotrode.
- Fig. 1
- 1 shows a schematic section through a sonotrode with connected vibration exciter and tool,
- Fig. 2
- a representation of the vibration of the sonotrode,
- Fig. 3
- a view of the sonotrode, and
- Fig. 4
- a variant of the sonotrode.
Die Ultraschall-Bearbeitungsvorrichtung nach Fig. 1 besteht aus einem Schwingungserreger 1 mit einem Piezoquarz-Dickenschwinger 2 und zwei stirnseitig damit verbundenen Metallzylindern 3, einem Verstärker oder Booster 4, einer Sonotrode 5 und einem Werkzeug 6. Der Schwingungserreger ist zylindrisch und führt harmonische Longitudinalschwingungen längs seiner Achse 10 mit einer Knotenebene in seiner axialen Längsmitte aus. Die Maximalamplitude tritt an den Stirnflächen des Schwinungserregers 1 auf. An die eine Stirnfläche ist die dickere Stirnfläche des als Rotationskörper ausgebildeten, koaxialen Verstärkers 4 angeschlossen. Der Verstärker 4 ist gegen die andere Stirnfläche hin vorzugsweise verjüngt und schwingt ebenfalls auf seiner Eigenfrequenz longitudinal um eine Knotenebene. Durch die Verjüngung wird die Schwingungsamplitude verstärkt.1 consists of a vibration exciter 1 with a piezo-
Die Sonotrode 5 ist als ringförmiger Biegeschwinger ausgebildet mit einer zylindrischen Aussenfläche 15 und einer koaxialen, zylindrischen Innenfläche 16. Das dünnere Ende des Verstärkers 4 ist in einen als Innengewinde ausgebildeten Eingang 17 der Sonotrode eingeschraubt. Der Eingang 17 ist koaxial zur Achse 10 und radial zur zylindrischen Aussenfläche 15. Der Ausgang 18 der Sonotrode 5 ist als Bohrung ausgebildet, in welche das hier rohrförmige Werkzeug 6 fest verbunden (z.B. eingelötet) ist. Die Ausgangsachse 19 ist ebenfalls radial und schneidet die Eingangsachse 10 unter einem Winkel von etwa 90°. An der Sonotrode 4 ist ein koaxiales Röhrchen 20 angeformt, das mit einer den Schwingungserreger 1 und den Verstärker 4 durchsetzenden Bohrung 21 kommuniziert. Das Röhrchen 20 ist mit der axialen Bohrung 23 des Werkzeuges 6 über einen Schlauch 22 verbunden. Bei der Ultraschall-Bearbeitung kann durch die Bohrung 21, den Schlauch 22 und das hohle Werkzeug 6 Schleifmittel von der als Arbeitsfläche wirkenden Stirnfläche 24 des Werkzeuges 6 abgesaugt oder zu dieser Stirnfläche 24 zugeführt werden.The
Die Biege-Eigenfrequenz der Sonotrode 5 ist gleich der Longitudinalschwingungs-Eigenfrequenz des Verstärkers 4 und des Schwinungserregers 1. Die Sonotrode 5 schwingt dabei um vier Knotenpunkte 33 bis 36. In Fig. 2 ist die Schwingung der neutralen Faser der Sonotrode 5 dargestellt. Wenn der Querschnitt der Sonotrode 5 über den ganzen Umfang gleich ist, ist die Ausgangsamplitude 31 der Sonotrodenschwingung gleich der Eingangsamplitude 30 (abgesehen von Reibungsverlusten). Wie ersichtlich ist, ist die Ausgangsamplitude maximal, wenn die Ausgangsachse 19 rechtwinklig zur Eingangsachse 10 steht, doch ist die Ausgangsamplitude noch nahe beim Maximalwert, wenn der Winkel geringfügig, z.B. ±20° von diesem Wert abweicht.The natural bending frequency of the
Besonders vorteilhaft ist es jedoch, wenn der Ring-Querschnitt der Sonotrode 5 vom Ausgang 18 her nach beiden Seiten bis zur diametral gegenüberliegenden Stelle zunimmt. Eine vorteilhafte Ausführungsform dieser Variante ist in Fig. 3 dargestellt: Die Sonotrode 5 ist in Richtung der Eingangsachse 10 projiziert keilförmig. Dadurch wirkt die Sonotrode 5 als Verstärker und die Ausgangsamplitude 31 ist grösser als die Eingangsamplitude 30.However, it is particularly advantageous if the ring cross section of the
In Fig. 4 ist eine Variante der Sonotrode 5 dargestellt, bei welcher das Werkzeug 6 lösbar mit der Sonotrode verbunden ist, z.B. von oben her in ein Muttergewinde 18' eingeschraubt. Wie aus Fig. 4 ersichtlich ist, kann zusätzlich eine Schleifmittel-Zufuhr über eine zusätzliche Bohrung 40 im Verstärker 4, einen weiteren Schlauch 41 und eine das Werkzeug 6 umgebende Ringdüse 42 vorgesehen sein.4 shows a variant of the
Durch die erfindungsgemässe Ausbildung der Sonotrode 5 als ringförmiger Biegeschwinger wird erreicht, dass das Werkzeug 6 im Winkel zur Achse 10 des Schwingungserregers 1 und Verstärkers 4 schwingt. Dadurch können auch schwer zugängliche Werkstücke effizient mit Ultraschall bearbeitet werden.The inventive design of the
Falls das Werkzeug 6 zusätzlich zu den Longitudinalschwingungen lateral schwingen soll, kann es abgewinkelt werden.If the
Für die Sonotrode 5 kommen unter Umständen auch andere Biege-Eigenschwingungen mit mehr als vier Knoten in Frage. In diesen Fällen ist der Winkel, unter dem sich die Achsen 10, 19 schneiden, von 90° verschieden. Bei sechs Knoten schneiden sich die Achsen 10, 19 z.B. vorzugsweise unter 120°.For the
Claims (7)
- Sonotrode for an ultrasound machining device, comprising an inlet (17) for the attachment of an oscillation generator (1, 4) and an outlet (18) for the attachment of a tool (6), characterised in that the sonotrode (5) is so constructed as a flexural resonator that the outlet (18) oscillates along its outlet axis (19) when the inlet (17) is excited to one of the flexural natural frequencies of the sonotrode (5) along its inlet axis (10), and wherein the inlet axis (10) and the outlet axis (19) intersect at an angle other than zero.
- Sonotrode according to claim 1, wherein it is of annular construction and the inlet axis (10) and the outlet axis (19) extend radially.
- Sonotrode according to claim 2, wherein the annular cross-section of the sonotrode (5) increases constantly in both directions from the outlet (18) to the diametrically opposite point.
- Sonotrode according to claim 2 or 3, wherein it has a circular-cylindrical outer face (15) and a coaxial, circular-cylindrical inner face (16).
- Sonotrode according to claim 3 or 4, wherein, projected parallel to the inlet axis (10), it is wedge-shaped.
- Sonotrode according to any one of claims 1 to 5, wherein the inlet axis (10) and the outlet axis (19) intersect at from 70° to 110°.
- Sonotrode according to any one of claims 1 to 6, wherein it comprises, coaxially with the outlet (18), an annular nozzle (42) for the feeding of abrasive.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH03258/92A CH689445A5 (en) | 1992-10-21 | 1992-10-21 | Sonotrode for ultrasonic material processing |
CH3258/92 | 1992-10-21 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0594541A2 EP0594541A2 (en) | 1994-04-27 |
EP0594541A3 EP0594541A3 (en) | 1994-09-21 |
EP0594541B1 true EP0594541B1 (en) | 1997-01-15 |
Family
ID=4252090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93810735A Expired - Lifetime EP0594541B1 (en) | 1992-10-21 | 1993-10-20 | Sonotrode for an ultrasound processing apparatus |
Country Status (7)
Country | Link |
---|---|
US (1) | US5426341A (en) |
EP (1) | EP0594541B1 (en) |
JP (1) | JP3739418B2 (en) |
AT (1) | ATE147666T1 (en) |
CH (1) | CH689445A5 (en) |
DE (1) | DE59305134D1 (en) |
ES (1) | ES2098711T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012105349A1 (en) | 2012-06-20 | 2013-12-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Ultrasound-assisted method, ultrasonic vibration system suitable for carrying out the method, and sonotrode |
Families Citing this family (19)
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DE4406323C2 (en) * | 1994-02-27 | 1997-07-17 | Hahn Rainer | Ultrasonic handpiece for the abrasive treatment of natural hard tissues as well as tooth and bone replacement materials |
JP4258745B2 (en) | 1997-03-21 | 2009-04-30 | ウッドウェルディング アーゲー | Fastening method for joining element in material having hole or void and joining element for fastening |
US6372066B1 (en) * | 1999-05-06 | 2002-04-16 | New Transducers Limited | Vibration exciter |
CH694058A5 (en) * | 1999-06-18 | 2004-06-30 | Woodwelding Ag | Fabric conclusive Connect. |
US6752815B2 (en) * | 2001-01-31 | 2004-06-22 | Ethicon Endo-Surgery, Inc. | Method and waveguides for changing the direction of longitudinal vibrations |
MXPA03007521A (en) | 2001-03-02 | 2003-12-04 | Woodwelding Ag | Implants, device and method for joining tissue parts. |
US7008226B2 (en) | 2002-08-23 | 2006-03-07 | Woodwelding Ag | Implant, in particular a dental implant |
US6955540B2 (en) * | 2002-08-23 | 2005-10-18 | Woodwelding Ag | Preparation for being fastened on a natural tooth part or tooth and corresponding fastening method |
US6877894B2 (en) | 2002-09-24 | 2005-04-12 | Siemens Westinghouse Power Corporation | Self-aligning apparatus for acoustic thermography |
US20060122543A1 (en) * | 2003-07-31 | 2006-06-08 | Woodwelding Ag | Method for promoting tissue regeneration on wound surfaces as device and treatment instrument or implant for carrying out method |
CN1980613B (en) * | 2004-02-20 | 2011-12-07 | 伍德韦尔丁公司 | Implant that can be implanted in osseous tissue, method for producing said implant and corresponding implant |
KR100862698B1 (en) * | 2006-02-14 | 2008-10-10 | (주)현대팩 | Material for a Environment-frendly Pallet |
KR101452523B1 (en) | 2006-03-09 | 2014-10-21 | 부트벨딩 아게 | Diversion of mechanical oscillations |
DE102006011593A1 (en) * | 2006-03-10 | 2007-09-13 | Dürr Dental GmbH & Co. KG | Elastic bendable coupling body |
WO2008129570A1 (en) * | 2007-04-19 | 2008-10-30 | Mectron S.P.A. | Ultrasound frequency resonant dipole for medical use |
WO2012123182A2 (en) | 2011-03-11 | 2012-09-20 | Nexilis Ag | Sonotrode for the introduction of ultrasonic energy |
WO2013117509A2 (en) | 2012-02-10 | 2013-08-15 | Nexilis Ag C/O Bdo Ag | Sonotrode for introducing ultrasonic energy |
DE102013109504B4 (en) * | 2013-08-30 | 2016-07-14 | Technische Universität Wien | Mechanical test method for components of electronics |
US10300453B2 (en) | 2013-10-16 | 2019-05-28 | University Of Iowa Research Foundation | Thin layer sonochemistry and sonoelectrochemistry devices and methods |
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US3058218A (en) * | 1959-05-07 | 1962-10-16 | Cavitron Ultrasonics Inc | Methods and means for driving small diameter shafts at high rotational speeds |
US3015961A (en) * | 1960-05-02 | 1962-01-09 | Sheffield Corp | Machine component |
US3209447A (en) * | 1962-03-12 | 1965-10-05 | Aeroprojects Inc | Transducer coupling system |
SE342154B (en) * | 1967-12-25 | 1972-01-31 | Nippon Kokan Kk | |
JPS5237952B2 (en) * | 1973-03-30 | 1977-09-26 | ||
US3926357A (en) * | 1973-10-09 | 1975-12-16 | Du Pont | Process for applying contacts |
FR2285188A1 (en) * | 1974-09-23 | 1976-04-16 | Masao Inoue | Energy accumulating vibration generator - has vibrators on peripheral surface of accumulator plate |
FR2354827A1 (en) * | 1976-06-16 | 1978-01-13 | Mecasonic Sa | ULTRA-SOUND-PRODUCING DEVICE THAT CAN BE USED IN PARTICULAR IN THE THERMOPLASTIC MATERIALS INDUSTRY |
US4088257A (en) * | 1977-02-14 | 1978-05-09 | Christiana Metals Corporation | Ultrasonic spot welder |
DE3335254A1 (en) * | 1983-09-29 | 1985-04-18 | Schunk Ultraschalltechnik Gmbh, 8750 Aschaffenburg | CONNECTING DEVICE COMPRESS ELECTRICAL LADDER |
JPS60229679A (en) * | 1984-04-26 | 1985-11-15 | Ricoh Co Ltd | Vibration piece type supersonic wave motor |
DE3710603C2 (en) * | 1986-10-23 | 1994-02-24 | Stapla Ultraschalltechnik Gmbh | Device intended in particular for connecting electrical conductors |
GB2216223A (en) * | 1987-11-10 | 1989-10-04 | Nat Res Dev | Radially-resonant structures |
US5159838A (en) * | 1989-07-27 | 1992-11-03 | Panametrics, Inc. | Marginally dispersive ultrasonic waveguides |
DE4128858C1 (en) * | 1991-08-30 | 1993-01-21 | Stapla Ultraschall-Technik Gmbh, 6092 Kelsterbach, De |
-
1992
- 1992-10-21 CH CH03258/92A patent/CH689445A5/en not_active IP Right Cessation
-
1993
- 1993-10-20 EP EP93810735A patent/EP0594541B1/en not_active Expired - Lifetime
- 1993-10-20 DE DE59305134T patent/DE59305134D1/en not_active Expired - Lifetime
- 1993-10-20 AT AT93810735T patent/ATE147666T1/en not_active IP Right Cessation
- 1993-10-20 ES ES93810735T patent/ES2098711T3/en not_active Expired - Lifetime
- 1993-10-20 JP JP26273493A patent/JP3739418B2/en not_active Expired - Fee Related
- 1993-10-21 US US08/139,025 patent/US5426341A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012105349A1 (en) | 2012-06-20 | 2013-12-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Ultrasound-assisted method, ultrasonic vibration system suitable for carrying out the method, and sonotrode |
Also Published As
Publication number | Publication date |
---|---|
DE59305134D1 (en) | 1997-02-27 |
EP0594541A2 (en) | 1994-04-27 |
US5426341A (en) | 1995-06-20 |
JP3739418B2 (en) | 2006-01-25 |
ATE147666T1 (en) | 1997-02-15 |
ES2098711T3 (en) | 1997-05-01 |
CH689445A5 (en) | 1999-04-30 |
EP0594541A3 (en) | 1994-09-21 |
JPH06198249A (en) | 1994-07-19 |
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