EP0951951B1 - Method of cleaning a metallic workpiece - Google Patents
Method of cleaning a metallic workpiece Download PDFInfo
- Publication number
- EP0951951B1 EP0951951B1 EP98400959A EP98400959A EP0951951B1 EP 0951951 B1 EP0951951 B1 EP 0951951B1 EP 98400959 A EP98400959 A EP 98400959A EP 98400959 A EP98400959 A EP 98400959A EP 0951951 B1 EP0951951 B1 EP 0951951B1
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- Prior art keywords
- vibration
- fluid
- sources
- cleaning
- contact
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- 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
Definitions
- the present invention relates to a method of cleaning and a device for implementing this method, this method used to extract foreign bodies (dust, sand, material residue ...) and dirt inside the enclosures rigid rigid whose complex and sinuous shape does not allow easy access to the areas to be cleaned. It aims more particularly a method of cleaning metal parts advantageously intended for the automotive industry or aeronautics, such as gearbox casings, engine cylinder heads, pump casings or any other part.
- shot blasting techniques may deteriorate the piece and furthermore the shot cannot reach the ends ducts of small cross-section, which are numerous in an engine cylinder head for example.
- the present invention therefore aims to overcome these drawbacks by offering an operating mode of an industrial cleaning process by vibration which provides excellent performance even within infructuosities of a massive piece of foundry.
- the device for the implementation of the process which is the subject of the invention is characterized by what it includes a cavity positioned on an integral table of a machine frame, this cavity being provided with a support elastic on which the part to be treated rests, the whole immersed in a fluid which can if necessary be put in circulation by a pump connected to the cavity, the frame further supporting at least one vibration generator at the contact of said part making it possible to excite at least one mode own of the latter.
- a cleaning fluid 8 in particular a liquid
- the cavity 5 rests on a table 4 secured to a frame 1 of machine and comprises an elastic support 6 on which the room 7 to be cleaned.
- the support must be elastic enough to avoid too much inertia reflection high on vibration generators 2, 3. Too large flexibility of the support 6 destroys the resonance of the part 7. It is sometimes necessary in order to increase the effectiveness of the incident wave, to create a reverberation by the addition, between the part 7 and the elastic support 6, an anvil of reaction (cf. figure 2) composed of a plurality of studs metal 15, 16, tuned to the incident frequency of the source or on a natural frequency of the part, these studs can be interconnected by a piece 17 of mass determined by experience.
- Part 7 must be oriented so that the conduits or the cavities to be cleaned remain free ends (see figure 3) in relation to the action points of the sources (2, 3) or of reaction of the studs (15, 16).
- the elastic support 6 is replaced by an actuator 14 which we can control movements.
- these vibration generators 2, 3 are ultrasonic heads, commonly called sonotrode, ultrasound being produced by a vibrating element driven by a piezoelectric system or by a magneto-restrictive device.
- Hammers or vibration generators operate from preferably at a frequency between 15 and 40 kHz.
- These heads 2, 3 are carried by the frame 1 of the machine and converge using a plurality of actuators 14 produced at from pneumatic, hydraulic, mechanical or such as cylinders or motors, towards the part 7 along axes which are not necessarily parallel.
- the sonotrodes are applied in contact with the part 7 in action points determined experimentally, so that bring the piece, by hammering, in a proper mode of resonance.
- the resonance mode of room 7 is all the more quickly reached that we combine the action of the generators of vibration 2, 3 and the contact forces under the pressure of actuators integral with the generators.
- the resonance of the part 7 gives birth to a setting cavitation of the fluid 8 in which the part 7 is bathed, and all specially the fluid cavitation 8 also spreads to the within small cross-sections and the interstices present in the room.
- the fluid in turbulent regime (- this fluid may be present in the form of a liquid or gaseous fluid) during its phase of cleaning, which at the start is not polluted, will be charged as and as residues which will act as an abrasive body, further improving the efficiency of cleaning.
- a pump 9 fitted with a suitable filter 10 on the fluid circuit
- the container 5 receiving the part 7 being further provided with an inlet 11 and an outlet 12 for this fluid, respectively connected to the ends of the line 13 supporting the pump 9 and the filter 10.
- the pump 9 operates intermittently during recycling of the fluid 8 to maintain an optimum concentration of residue, only a fraction of the dirt being stopped by the filter 10.
- the fluid may include all or part of a solvent or a Laundry.
- the volume of fluid may be limited to only conduits or cavities to be cleaned by imprisonment or by controlled traffic.
- a third method we control the intensity of the shocks applied to the part to be vibrated by a speed control or in acceleration of the alternative displacement of the source vibration, independently of the vibration regime of the face of work of this source through the actuator 14.
- the vibration frequency is modulated the source by amplitude modulation of the signal electric supplied to the piezoelectric or magnetostrictive system under the effect of a periodic signal of lower frequency.
- a vibration source having a very wide bandwidth it is possible to modulate in frequency in limits of this band.
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- Cleaning By Liquid Or Steam (AREA)
- Cleaning In General (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
Description
La présente invention est relative à un procédé de nettoyage et un dispositif pour la mise en oeuvre de ce procédé, ce procédé permettant d'extraire des corps étrangers (poussière, sable, résidu de matière...) et salissures de l'intérieur d'enceintes rigides creuses dont la forme complexe et sinueuse ne permet pas d'accéder aisément aux zones à nettoyer. Elle vise plus particulièrement un procédé de nettoyage de pièces métalliques destinées avantageusement à l'industrie automobile ou aéronautique, comme par exemple des carters de boíte de vitesse, des culasses de moteur, des corps de pompe ou toute autre pièce.The present invention relates to a method of cleaning and a device for implementing this method, this method used to extract foreign bodies (dust, sand, material residue ...) and dirt inside the enclosures rigid rigid whose complex and sinuous shape does not allow easy access to the areas to be cleaned. It aims more particularly a method of cleaning metal parts advantageously intended for the automotive industry or aeronautics, such as gearbox casings, engine cylinder heads, pump casings or any other part.
Les procédés traditionnels de nettoyage de pièce utilisent diverses techniques, comme par exemple les vibrations à basse fréquence, la circulation de fluides à haute pression, la cavitation d'un fluide par cuves à ultrasons (la pièce ayant été préalablement déposée dans la cuve), le grenaillage par des billes d'acier ou de glace, ou encore une méthode manuelle à l'aide d'un écouvillon ou d'une brosse.Traditional room cleaning processes use various techniques, such as low vibration frequency, the circulation of high pressure fluids, the cavitation of a fluid by ultrasonic tanks (the part having been previously deposited in the tank), blasting with steel or ice balls, or a manual method using using a swab or brush.
Dans le cas du nettoyage de pièces métalliques massives à base essentiellement d'aluminium ou d'alliages d'aluminium et ne présentant pas une dureté similaire à celle de la fonte ou de l'acier, les techniques de grenaillage risquent de détériorer la pièce et de plus la grenaille ne peut atteindre les extrémités des conduits de faible section, qui sont en nombre conséquent dans une culasse de moteur par exemple.In the case of cleaning massive metal parts based on mainly aluminum or aluminum alloys and does not not having a hardness similar to that of cast iron or steel, shot blasting techniques may deteriorate the piece and furthermore the shot cannot reach the ends ducts of small cross-section, which are numerous in an engine cylinder head for example.
On comprend facilement que les techniques manuelles ne sont pas industriellement transférables pour une production de pièces en série.It is easy to understand that manual techniques are not industrially transferable for production of parts in series.
Etant donné que ces pièces sont issues de fonderie, il demeure des résidus de sable, des scories ou encore des copeaux d'usinage à l'intérieur des conduits de lubrification ou de refroidissement, qui sont extrêmement difficiles à éliminer, même par des techniques de vibrations à basse fréquence ou par cavitation de fluide dans une cuve à ultrasons, particulièrement le fluide n'est plus en cavitation au sein des petits conduits.Since these parts come from foundry, it remains sand residue, slag or chips machining inside the lubrication or which are extremely difficult to remove, even by low frequency vibration techniques or by cavitation of fluid in an ultrasonic tank, particularly the fluid is no longer cavitation in the small conduits.
On connaít par les brevets DE-827 282 et DE-836 586, des procédés utilisant des vibrations de fréquence élevées de type ultrasonore pour enlever des dépôts présents sur une pièce métallique.We know from the patents DE-827 282 and DE-836 586, processes using high frequency vibrations of the type ultrasonic to remove deposits from a part metallic.
La présente invention vise donc à pallier ces inconvénients en proposant un mode de marche d'un procédé industriel de nettoyage par vibration qui offre un excellent rendement de, même au sein des infractuosités d'une pièce massive de fonderie.The present invention therefore aims to overcome these drawbacks by offering an operating mode of an industrial cleaning process by vibration which provides excellent performance even within infructuosities of a massive piece of foundry.
A cet effet, le procédé de nettoyage par vibration d'une pièce métallique, notamment issue de fonderie, se caractérise en ce que :
- on dispose la pièce à traiter sur un plateau support dans un récipient rempli de fluide,
- on positionne au contact de la pièce au moins un générateur de vibration,
- on excite par l'intermédiaire de générateurs un mode propre de vibration de la pièce, ce qui met en cavitation le fluide baignant au sein de la pièce, les générateurs de vibration en contact de la pièce travaillant selon un cycle de fonctionnement des sources vibratoires, qui est optimisé par un procédé de gestion de l'état des sources.
- the part to be treated is placed on a support tray in a container filled with fluid,
- at least one vibration generator is positioned in contact with the workpiece,
- a specific mode of vibration of the part is excited by means of generators, which cavitates the fluid bathing within the part, the vibration generators in contact with the part working according to an operating cycle of the vibratory sources, which is optimized by a source state management process.
Selon une caractéristique avantageuse, le dispositif pour la mise en oeuvre du procédé objet de l'invention se caractérise en ce qu'il comporte une cavité positionnée sur une table solidaire d'un bâti d'une machine, cette cavité étant pourvue d'un support élastique sur lequel repose la pièce à traiter, l'ensemble baignant dans un fluide pouvant le cas échéant être mis en circulation par une pompe connectée à la cavité, le bâti supportant en outre au moins un générateur de vibrations au contact de ladite pièce permettant d'exciter au moins un mode propre de cette dernière.According to an advantageous characteristic, the device for the implementation of the process which is the subject of the invention is characterized by what it includes a cavity positioned on an integral table of a machine frame, this cavity being provided with a support elastic on which the part to be treated rests, the whole immersed in a fluid which can if necessary be put in circulation by a pump connected to the cavity, the frame further supporting at least one vibration generator at the contact of said part making it possible to excite at least one mode own of the latter.
D'autres caractéristiques et avantages de la présente invention ressortiront de la description faite ci-après, en référence aux dessins annexés qui en illustrent un exemple de réalisation dépourvu de tout caractère limitatif. Sur les figures :
- la figure 1 illustre un dispositif permettant de mettre en oeuvre le procédé objet de l'invention.
- la figure 2 est une vue en coupe illustrant un autre mode de réalisation d'un dispositif pour la mise en oeuvre du procédé objet de l'invention.
- la figure 3 est une vue en coupe illustrant le positionnement de la pièce dans son récipient de nettoyage.
- Figure 1 illustrates a device for implementing the method of the invention.
- Figure 2 is a sectional view illustrating another embodiment of a device for implementing the method of the invention.
- Figure 3 is a sectional view illustrating the positioning of the part in its cleaning container.
Selon un mode préféré de réalisation du procédé objet de
l'invention, on dispose la pièce 7 à traiter au sein d'une
cavité 5 remplie d'un fluide de nettoyage 8, notamment un
liquide, le fluide recouvrant tout ou partie de la pièce 7 afin
de diminuer l'énergie nécessaire à sa mise en vibration tout en
baignant particulièrement l'ensemble des canaux et interstices
de cette dernière.According to a preferred embodiment of the method which is the subject of
the invention, there is the part 7 to be treated within a
La cavité 5 repose sur une table 4 solidaire d'un bâti 1 de
machine et comporte un support élastique 6 sur lequel repose la
pièce 7 à nettoyer. Il est nécessaire que le support soit
suffisamment élastique pour éviter une réflexion d'inertie trop
élevée sur les générateurs de vibration 2, 3. Une trop grande
souplesse du support 6 anéantit la mise en résonance de la pièce
7. Il est parfois nécessaire, en vue d'augmenter l'efficacité de
l'onde incidente, de créer une réverbération par l'adjonction,
entre la pièce 7 et le support élastique 6, d'une enclume de
réaction (cf. figure 2) composée d'une pluralité de plots
métalliques 15, 16, accordés sur la fréquence incidente de la
source ou sur une fréquence propre de la pièce, ces plots
pouvant être reliés entre eux par une pièce 17 de masse
déterminée par l'expérience.The
La pièce 7 doit être orientée de façon à ce que les conduits ou les cavités à nettoyer restent des extrémités libres (cf. figure 3) par rapport aux points d'action des sources (2, 3) ou de réaction des plots (15, 16).Part 7 must be oriented so that the conduits or the cavities to be cleaned remain free ends (see figure 3) in relation to the action points of the sources (2, 3) or of reaction of the studs (15, 16).
Puis dans le récipient 5, la pièce 7 reposant sur son support
élastique 6 et baignant dans le fluide 8 approprié est mise en
résonance par l'intermédiaire d'une pluralité de générateurs de
vibration 2, 3.Then in the
Selon un autre mode de réalisation, le support élastique 6 est
remplacé par un actionneur 14 dont on pourra maítriser les
mouvements.According to another embodiment, the elastic support 6 is
replaced by an
De manière avantageuse, ces générateurs de vibration 2, 3 sont
des têtes à ultrasons, communément appelées sonotrode, les
ultrasons étant produits par un élément vibrant mû par un
système piézo-électrique ou par un dispositif magnéto-strictif.Advantageously, these
Les marteaux ou les générateurs de vibrations fonctionnent de manière préférentielle à une fréquence comprise entre 15 et 40 kHz.Hammers or vibration generators operate from preferably at a frequency between 15 and 40 kHz.
Ces têtes 2, 3 sont portées par le bâti 1 de la machine et
convergent à l'aide d'une pluralité d'actionneurs 14 réalisés à
partir d'éléments pneumatiques, hydrauliques, mécaniques ou
électriques tels que des vérins ou des moteurs, en direction de
la pièce 7 suivant des axes non forcément parallèles. These
Les sonotrodes sont appliquées au contact de la pièce 7 en des
points d'action déterminés expérimentalement, de manière à
amener la pièce, par martèlement, dans un mode propre de
résonance. Le mode de résonance de la pièce 7 est d'autant plus
vite atteint que l'on conjugue l'action des générateurs de
vibration 2, 3 et les forces de contact sous la pression des
actionneurs solidaires des générateurs.The sonotrodes are applied in contact with the part 7 in
action points determined experimentally, so that
bring the piece, by hammering, in a proper mode of
resonance. The resonance mode of room 7 is all the more
quickly reached that we combine the action of the generators of
La mise en résonance de la pièce 7 fait naítre une mise en
cavitation du fluide 8 dans lequel baigne la pièce 7, et tout
spécialement la cavitation de fluide 8 se propage également au
sein des conduits de faible section et les interstices présents
dans la pièce.The resonance of the part 7 gives birth to a setting
cavitation of the
Le régime turbulent extrêmement intense du fluide régnant dans la totalité des infractuosités de la pièce 7, génère le nettoyage de celles-ci, les salissures et les résidus étant entraínés par le fluide en cavitation.The extremely intense turbulent regime of the fluid prevailing in all of the faults in Exhibit 7, generates the cleaning these, dirt and residues being entrained by the fluid in cavitation.
Le fluide en régime turbulent (- ce fluide pouvant se présenter sous la forme d'un fluide liquide ou gazeux) lors de sa phase de nettoyage, qui au départ n'est pas pollué, va se charger au fur et à mesure de résidus qui vont jouer le rôle de corps abrasif, améliorant d'autant l'efficacité du nettoyage.The fluid in turbulent regime (- this fluid may be present in the form of a liquid or gaseous fluid) during its phase of cleaning, which at the start is not polluted, will be charged as and as residues which will act as an abrasive body, further improving the efficiency of cleaning.
On prévoit de disposer une pompe 9 munie d'un filtre 10 adéquat
sur le circuit du fluide, le récipient 5 recevant la pièce 7
étant en outre pourvue d'un orifice d'entrée 11 et de sortie 12
pour ce fluide, respectivement connecté aux extrémités de la
conduite 13 supportant la pompe 9 et le filtre 10.It is planned to have a
Afin de maintenir une efficacité maximale au nettoyage, la pompe
9 fonctionne de façon intermittente lors du recyclage du fluide
8 pour conserver à celui-ci une concentration optimale en
résidu, seule une fraction des salissures étant stoppée par le
filtre 10. In order to maintain maximum cleaning efficiency, the
Suivant le type de salissures ou de résidus à enlever, l'action mécanique de nettoyage sous l'effet de la cavitation du fluide sera complétée si besoin par une action chimique, le fluide pouvant comporter en totalité ou en partie un solvant ou une lessive. Afin de limiter l'énergie incidente nécessaire, et ce notamment pour des pièces de masse très importante, tels que des blocs moteur, le volume de fluide pourra être limité aux seuls conduits ou cavités à nettoyer par emprisonnement ou par circulation contrôlée.Depending on the type of dirt or residue to be removed, the action mechanical cleaning under the effect of fluid cavitation will be supplemented if necessary by a chemical action, the fluid may include all or part of a solvent or a Laundry. In order to limit the incident energy required, and this especially for parts of very large mass, such as engine blocks, the volume of fluid may be limited to only conduits or cavities to be cleaned by imprisonment or by controlled traffic.
Par ailleurs, en fonction des applications visées, il est
parfois nécessaire d'utiliser, non pas un récipient classique 5
(qui n'est pas excité par des générateurs 2, 3), mais une cuve
5' similaire à celle employée lors des procédés de nettoyage par
ultrasons (dans ce cas, la cuve 5' est reliée à un générateur
d'ultrasons qui la porte en résonance). Dans cette application,
les deux modes de résonance, l'un provenant de la cuve 5',
l'autre de la pièce 7, se conjuguent au sein du fluide 8 en
circulation, ce qui augmente l'intensité de la cavitation du
fluide et par voie de conséquence, l'efficacité du nettoyage.Furthermore, depending on the intended applications, it is
sometimes necessary to use, not a conventional container 5
(which is not excited by
Comme nous l'avons vu précédemment, l'énergie nécessaire à la mise en résonance de la pièce 7 de fonderie ou l'obligation d'augmenter la transmission sur un ensemble de zones parfaitement délimitées, nécessite l'emploi d'une pluralité de générateurs d'ultrasons (sonotrode) qui peuvent, soit travailler de manière simultanée, soit de manière alternative en suivant un protocole cyclique établi en fonction du résultat sur la pièce 7.As we saw earlier, the energy required to resonance of part 7 of the foundry or the obligation increase transmission over a set of areas perfectly delimited, requires the use of a plurality of ultrasonic generators (sonotrode) which can either work simultaneously, or alternatively by following a cyclic protocol established according to the result on the part 7.
Il est de plus très souvent nécessaire d'optimiser le couplage
entre les sources vibratoires 2, 3 et la pièce 7 à porter en
résonance par l'adjonction d'un mouvement sinusoïdal ou
discontinu propre à chacun des générateurs de vibration.It is moreover very often necessary to optimize the coupling.
between the
Selon une première méthode, on désaccouple au moins une des sources vibratoires liées au bâti de la machine par l'intermédiaire d'un dispositif élastique réglable, notamment à l'aide d'un ressort tarable, afin d'optimiser la raideur du sytème oscillant.According to a first method, at least one of the vibration sources linked to the machine frame by through an adjustable elastic device, in particular at using a tarable spring, to optimize the stiffness of the oscillating system.
Selon une deuxième méthode, on maítrise la modulation de
l'effort appliqué sur la pièce à vibrer par un asservissement de
la pression de contact de la source vibratoire sur la pièce, par
ajustement de l'effort transmis à cette source de vibration par
l'actionneur 14.According to a second method, we control the modulation of
the force applied to the part to be vibrated by a servo-control of
the contact pressure of the vibration source on the workpiece, by
adjustment of the force transmitted to this source of vibration by
the
Selon une troisième méthode, on maítrise l'intensité des chocs
appliqués sur la pièce à vibrer par un asservissement en vitesse
ou en accélération du déplacement alternatif de la source
vibratoire, indépendamment du régime de vibration de la face de
travail de cette source par l'intermédiaire de l'actionneur 14.According to a third method, we control the intensity of the shocks
applied to the part to be vibrated by a speed control
or in acceleration of the alternative displacement of the source
vibration, independently of the vibration regime of the face of
work of this source through the
Selon une quatrième méthode, on module la fréquence de vibration de la source par une modulation en amplitude du signal électrique fourni au système piézo-électrique ou magnétostrictif sous l'effet d'un signal périodique de fréquence inférieure. Dans le cas d'une source vibratoire possédant une très large bande passante, il est possible de moduler en fréquence dans les limites de cette bande.According to a fourth method, the vibration frequency is modulated the source by amplitude modulation of the signal electric supplied to the piezoelectric or magnetostrictive system under the effect of a periodic signal of lower frequency. In the case of a vibration source having a very wide bandwidth, it is possible to modulate in frequency in limits of this band.
Ces quatre méthodes non limitatives qui peuvent si besoin se combiner entre elles, ont pour but, d'une part d'éviter un état stationnaire où toute l'énergie fournie serait réfléchie plutôt qu'absorbée par la pièce de fonderie à porter en résonance, et d'autre part d'optimiser une fréquence de contact de la source vibratoire (sonotrode) sur un ou plusieurs modes propres de vibration à cette pièce.These four nonlimiting methods which can if necessary be combine between them, aim, on the one hand, to avoid a state stationary where all the energy supplied would be reflected rather that absorbed by the foundry piece to be worn in resonance, and secondly, to optimize a source contact frequency vibratory (sonotrode) on one or more eigen modes of vibration to this room.
Il demeure bien entendu que la présente invention n'est pas limitée aux exemples de réalisation décrits et représentés ci-dessus, mais qu'elle en englobe toutes les variantes.Obviously, the present invention is not limited to the exemplary embodiments described and represented above, but that it encompasses all variants.
Claims (18)
- Process for vibration cleaning a metal part, in particular a part originating from a foundry, characterized in that:the part (7) to be treated is arranged on a support plate (6) in a container (5) filled with fluid (8),at least one vibration generator (2, 3) is positioned in contact with the part (7)via generators (2, 3) a fundamental mode of vibration of the part (7) is excited, which produces cavitation in the fluid (8) inside the part (7), the vibration generators (2,3) in contact with the part (7) working according to an operating cycle of the vibration sources (2, 3) which is optimized by a process for managing the state of the sources.
- Process for cleaning according to claim 1, characterized in that the vibration generators (2, 3) operate at a frequency comprised between 15 and 40 kHz.
- Process for cleaning according to one of claims 1 or 2, characterized in that the container (5) in which the part (7) rests is brought to resonance.
- Process for cleaning according any one of the previous claims, characterized in that the vibration generators (2, 3) in contact with the part (7) work in a simultaneous manner.
- Process for cleaning according to claim 1, characterized in that the process for managing the state of the sources (2, 3) consists of disconnecting at least one of the vibration sources linked to the housing of the machine via an adjustable elastic device, in particular using a calibrated spring.
- Process for cleaning according to claim 1, characterized in that the process for managing the state of the sources (2, 3) consists of controlling the modulation of the force applied to the part (7) to be vibrated by a control of the contact pressure of the head of the generator on the part (7), by adjustment of the force transmitted to the vibration generator by the actuator (14).
- Process for cleaning according to claim 1, characterized in that the process for managing the sources (2, 3) consists of controlling the intensity of the shocks applied to the part to be vibrated by a speed or acceleration control of the alternating displacement of the vibration source, independent of the system of vibration of the working surface of this source, via the actuator (14).
- Process for cleaning according to claim 1, characterized in that the process for managing the sources consists of modulating the vibration frequency of the source (2, 3) by an amplitude or frequency modulation of the electric signal supplied to the piezo-electric or magnetostrictive system under the effect of a periodic signal of lower frequency.
- Process for cleaning according to any one of claims 1 to 8, characterized in that the part (7) is oriented in such a manner that the ducts or cavities to be cleaned remain free ends with respect to the action points of the sources (2, 3) or reaction points of the mountings (15, 16).
- Process for cleaning according to any one of claims 1 to 9, characterized in that the fluid (8) in cavitation is limited exclusively to the ducts or cavities to be cleaned by trapping or by controlled circulation.
- Device for the implementation of the process according to any one of claims 1 to 10, characterized in that it comprises a container (5) positioned on a table (4) integral with the frame (1) of a machine, this container (5) being provided with an elastic support (6) or an actuator (14) on which the part (7) to be treated rests, the whole assembly being immersed in a fluid (8) circulated by a pump connected to the container (5), the frame (1) moreover supporting at least one vibration generator (2, 3) in contact with said part (7), making it possible to excite at least one fundamental mode of the latter.
- Device according to claim 11, characterized in that the vibration generators (2, 3) are ultrasound heads, the ultrasounds being produced by a vibrating element moved by a piezo-electric system or by a magnetostrictive device.
- Device according to one of claims 11 or 12, characterized in that the pump (9) operates intermittently during the recycling of the fluid (8) in order to retain in the latter an optimal residue concentration, only a fraction of the dirt being stopped by the filter (10).
- Device according to any one of claims 11 to 13, characterized in that the fluid (8) wholly or partly comprises a solvent or a washing liquor.
- Device according to any one of claims 11 to 14, characterized in that the vibration generators (2, 3) are brought into contact with the part (7) via actuators (14) linked to the frame (1), said actuators being optionally disengageable.
- Device according to any one of claims 11 to 15, characterized in that between the part (7) and the elastic support (6) a reaction anvil is interposed.
- Device according to claim 16, characterized in that the reaction anvil is constituted by a plurality of metal mountings (15, 16), which can be tuned to a vibration frequency of the source or of the part, and optionally interlinked by a part (17) of predetermined mass.
- Device according to any one of claims 11 to 17, characterized in that the actuators (14), comprise in particular pneumatic, hydraulic, mechanical or electrical elements, the latter being oriented in the direction of the part (7) following axes which are not necessarily parallel.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9613139A FR2755038B1 (en) | 1996-10-28 | 1996-10-28 | METHOD FOR CLEANING METAL PARTS |
| AT98400959T ATE250988T1 (en) | 1996-10-28 | 1998-04-17 | METHOD FOR CLEANING A METAL WORKPIECE |
| EP98400959A EP0951951B1 (en) | 1996-10-28 | 1998-04-17 | Method of cleaning a metallic workpiece |
| DE69818637T DE69818637T2 (en) | 1996-10-28 | 1998-04-17 | Process for cleaning a metallic workpiece |
| ES98400959T ES2209077T3 (en) | 1996-10-28 | 1998-04-17 | CLEANING PROCEDURE OF A METAL PART. |
| CA002235425A CA2235425A1 (en) | 1996-10-28 | 1998-04-21 | Cleaning method for metallic workpieces |
| US09/066,939 US6017398A (en) | 1996-10-28 | 1998-04-28 | Immersed metal cleaning by subjecting object to natural resonant frequency |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9613139A FR2755038B1 (en) | 1996-10-28 | 1996-10-28 | METHOD FOR CLEANING METAL PARTS |
| EP98400959A EP0951951B1 (en) | 1996-10-28 | 1998-04-17 | Method of cleaning a metallic workpiece |
| CA002235425A CA2235425A1 (en) | 1996-10-28 | 1998-04-21 | Cleaning method for metallic workpieces |
| US09/066,939 US6017398A (en) | 1996-10-28 | 1998-04-28 | Immersed metal cleaning by subjecting object to natural resonant frequency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0951951A1 EP0951951A1 (en) | 1999-10-27 |
| EP0951951B1 true EP0951951B1 (en) | 2003-10-01 |
Family
ID=31499377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98400959A Expired - Lifetime EP0951951B1 (en) | 1996-10-28 | 1998-04-17 | Method of cleaning a metallic workpiece |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6017398A (en) |
| EP (1) | EP0951951B1 (en) |
| AT (1) | ATE250988T1 (en) |
| CA (1) | CA2235425A1 (en) |
| DE (1) | DE69818637T2 (en) |
| ES (1) | ES2209077T3 (en) |
| FR (1) | FR2755038B1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2791282B1 (en) | 1999-03-23 | 2001-05-11 | Forward Tech Industries Sa | METHOD FOR CLEANING OR STORING A FOUNDRY PIECE |
| TW200601439A (en) * | 2004-06-18 | 2006-01-01 | Innolux Display Corp | Etching chamber |
| US7604702B2 (en) * | 2004-10-29 | 2009-10-20 | Crest Ultrasonics Corp. | Method, apparatus, and system for bi-solvent based cleaning of precision components |
| DE102005055291B4 (en) * | 2005-11-21 | 2020-07-02 | Vanguard Ag Medical Services For Europe | Method and device for cleaning objects using ultrasound |
| DE102006030364A1 (en) * | 2006-06-27 | 2008-01-03 | Siemens Ag | Method for removing a protective coating from a component |
| US8327861B2 (en) * | 2006-12-19 | 2012-12-11 | Lam Research Corporation | Megasonic precision cleaning of semiconductor process equipment components and parts |
| US20080156354A1 (en) * | 2006-12-30 | 2008-07-03 | Ameren Corporation | System and method for cleaning catalytic converter |
| JP5470244B2 (en) | 2007-05-24 | 2014-04-16 | トリュッチュラー・ノンウーヴェンス・アンド・マン−メイド・ファイバーズ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Method and apparatus for operating a stretching section or stretching unit |
| US20090133712A1 (en) * | 2007-11-26 | 2009-05-28 | General Electric Company | Methods for cleaning generator coils |
| CN104117513A (en) * | 2014-07-28 | 2014-10-29 | 国家海洋标准计量中心 | Ultrasonic cleaning system for hydrostatic pressure test tank |
| CN104625029B (en) * | 2015-01-20 | 2016-08-17 | 华中科技大学 | A kind of aluminum or Mg alloy castings core cleaning plant and core method for cleaning thereof |
| DE102015106343A1 (en) * | 2015-04-24 | 2016-10-27 | Weber Ultrasonics Gmbh | Device and method for deburring components by means of ultrasound |
| FR3036637B1 (en) * | 2015-05-29 | 2019-06-07 | Safran Aircraft Engines | METHOD FOR DECOATING A FOUNDRY CORE, AND METHOD FOR MAKING MOLDING COMPRISING SUCH A METHOD |
| CN105382215A (en) * | 2015-11-29 | 2016-03-09 | 无锡市鑫茂锻造有限公司 | Ultrasonic washing type sand removal head of casting mold |
| CN107716383A (en) * | 2017-12-04 | 2018-02-23 | 陈飞华 | A kind of apparatus Quick cleaning device for building |
| DE102020122078A1 (en) | 2020-08-24 | 2022-02-24 | Piller Entgrattechnik Gmbh | Process and system for fluid processing and cleaning of a workpiece |
| CN114192762A (en) * | 2021-12-06 | 2022-03-18 | 贵溪骏达特种铜材有限公司 | A belt cleaning device for special type copper product foundry goods |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE827282C (en) * | 1947-05-19 | 1952-01-10 | Das Manufactures Des Glaces Et | Process for removing solid coatings adhering to metal bodies, in particular to casting molds |
| DE836586C (en) * | 1950-05-31 | 1952-04-15 | Saint Gobain | Process for removing solid coatings adhering to metal bodies, in particular casting molds |
| US2958332A (en) * | 1958-09-19 | 1960-11-01 | Hassan E Schueler | Ultrasonic cleaning apparatus basket assembly |
| DE2558239A1 (en) * | 1975-12-23 | 1977-06-30 | Siemens Ag | Chemical cleaning bath for semiconductor - uses one container for all cleaning steps allowing water saving and permits ultrasonic cleaning where necessary |
| EP0131080B1 (en) * | 1983-07-06 | 1987-11-19 | Snef Electro Mecanique | Method and apparatus for cleaning big work pieces |
| US5119840A (en) * | 1986-04-07 | 1992-06-09 | Kaijo Kenki Co., Ltd. | Ultrasonic oscillating device and ultrasonic washing apparatus using the same |
| US4836684A (en) * | 1988-02-18 | 1989-06-06 | Ultrasonic Power Corporation | Ultrasonic cleaning apparatus with phase diversifier |
| US5118355A (en) * | 1988-05-16 | 1992-06-02 | Iben Browning | Ultrasonic cleaning method |
| JP2832443B2 (en) * | 1988-11-22 | 1998-12-09 | 本多電子株式会社 | Multi-frequency ultrasonic cleaning method and cleaning apparatus |
| US5143103A (en) * | 1991-01-04 | 1992-09-01 | International Business Machines Corporation | Apparatus for cleaning and drying workpieces |
| JPH0810731A (en) * | 1994-06-27 | 1996-01-16 | Yoshihide Shibano | Ultrasonic washing device |
| US5711327A (en) * | 1995-10-10 | 1998-01-27 | Fields; John T. | System for vibration cleaning of articles including radiators |
| US5865199A (en) * | 1997-10-31 | 1999-02-02 | Pedziwiatr; Michael P. | Ultrasonic cleaning apparatus |
-
1996
- 1996-10-28 FR FR9613139A patent/FR2755038B1/en not_active Expired - Fee Related
-
1998
- 1998-04-17 EP EP98400959A patent/EP0951951B1/en not_active Expired - Lifetime
- 1998-04-17 AT AT98400959T patent/ATE250988T1/en not_active IP Right Cessation
- 1998-04-17 DE DE69818637T patent/DE69818637T2/en not_active Expired - Fee Related
- 1998-04-17 ES ES98400959T patent/ES2209077T3/en not_active Expired - Lifetime
- 1998-04-21 CA CA002235425A patent/CA2235425A1/en not_active Abandoned
- 1998-04-28 US US09/066,939 patent/US6017398A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ATE250988T1 (en) | 2003-10-15 |
| EP0951951A1 (en) | 1999-10-27 |
| ES2209077T3 (en) | 2004-06-16 |
| US6017398A (en) | 2000-01-25 |
| FR2755038B1 (en) | 1998-12-24 |
| CA2235425A1 (en) | 1999-10-21 |
| DE69818637T2 (en) | 2004-08-05 |
| DE69818637D1 (en) | 2003-11-06 |
| FR2755038A1 (en) | 1998-04-30 |
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