EP0375556B1 - Suction cup for the electrolytic treatment of a surface - Google Patents

Suction cup for the electrolytic treatment of a surface Download PDF

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Publication number
EP0375556B1
EP0375556B1 EP89403603A EP89403603A EP0375556B1 EP 0375556 B1 EP0375556 B1 EP 0375556B1 EP 89403603 A EP89403603 A EP 89403603A EP 89403603 A EP89403603 A EP 89403603A EP 0375556 B1 EP0375556 B1 EP 0375556B1
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EP
European Patent Office
Prior art keywords
chamber
chambers
electrolyte
suction cup
flow
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.)
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EP89403603A
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German (de)
French (fr)
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EP0375556A1 (en
Inventor
André Charamathieu
Gérard Gouaillardou
Jean-Pierre Cizel
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Orano DS Demantelement et Services SA
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STMI Societe des Techniques en Milieu Ionisant SPL
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/08—Electroplating with moving electrolyte e.g. jet electroplating

Definitions

  • the invention relates to a suction cup for electrolytic treatment of a surface and can be used in general for all treatments which involve the circulation of an electrolyte current between the surface and an electrode at a different potential. from that of the surface and at a short distance, such as electropolishing, electrodecontamination, electrodepalting, electrodeposition or anodic treatment.
  • suction cups already known which essentially comprise a generally electrically insulating carcass and a seal with a closed contour pressed against the surface.
  • the carcass is hollow and its cavity contains two chambers which are delimited by the electrode.
  • the electrolyte circulates in the rear intake chamber then passes through the electrode through the holes made in it, passes into the front chamber where it is brought into contact with the surface to be treated, which constitutes a wall of this front chamber , and is then sucked by a pipe which crosses the carcass.
  • the flow is generally perpendicular to the surface in the rear intake chamber and the front chamber.
  • the object of the invention is to overcome these drawbacks by means of an electrolytic treatment suction cup whose geometrical conformation makes it possible to obtain a uniform flow in the circulation chamber.
  • the new electrolytic treatment suction cup comprises a generally electrically insulating carcass, partially delimiting an electrolyte cavity, the carcass being provided with an electrode installed in the cavity, with two electrolyte pipe connections opening out in front of two ends of the cavity, an elastic joint with a closed contour partially delimiting the cavity and intended to be pressed against the surface, the electrode then coming in front of the surface at a uniform distance from the latter and separating the cavity into an electrolyte circulation chamber located between the electrode and the surface, an electrolyte intake chamber located between the circulation chamber and one of the connections and an electrolyte suction chamber located between the circulation chamber and the other connection, the suction cup being characterized in that the electrode is continuous and the intake and suction chambers are formed cha cune of a circulation equalization chamber communicating with the circulation chamber by a respective slot, the slots being located on two opposite sides of the circulation chamber, the distribution chambers comprising a part adjacent to the slot where the electrolyte flows against the current with respect to its flow in the circulation chamber, as well as
  • the distribution chambers may be made for the distribution chambers to shrink towards the circulation equalization chambers in a direction perpendicular to the direction of extension of the slots, than the equalization chambers circulation widens towards the distribution chambers in a direction perpendicular to the direction of the slots, that they comprise a part adjacent to the distribution chambers where the electrolyte flows in the same direction as in the circulation chamber, or still that the circulation chambers are composed of a recess adjacent to the distribution chambers and of a complementary part extending between the distribution chambers and the slots.
  • the parts of the suction cup and in particular the electrode can be flat or arcuate according to the curvature of the surface to be treated.
  • the suction cup consists of a carcass 1 of an electrically insulating material, such as plastic, and which is crossed by an electrode 2 which ends in an electrode plate 3 which is flat and continuous.
  • the electrode 2 opens out of the carcass 1 opposite the surface S to be treated by a cable 4 supplied with direct current by a generator and a rectifier not shown.
  • the carcass 1 is further provided with sockets for gripping the suction cup and its pressing on the surface S, here of opposite appendages 5, and of a closed contour seal 6 of elastic material which is applied to the surface S to define a sealed volume.
  • the seal 6 advantageously comprises an inflatable air chamber 7 in its part adjacent to the surface S.
  • the carcass 1 is hollow and defines with the seal 6 and the surface S a sealed electrolyte circulation cavity when the suction cup is in the working position.
  • the electrode plate 3 extends inside the cavity and delimits there an electrolyte circulation chamber 8 with the surface S.
  • the rest of the cavity forms an intake chamber 9a and a suction chamber 9b of the electrolyte, similar and symmetrical chambers, as well as the rest of the suction cup, relative to a plane P per pendulum to the surface S and to the plane of Figure 1.
  • Each of these chambers can be broken down into a distribution chamber 10 and a circulation equalization chamber 11.
  • the distribution chamber 10 extends between a connection 12 intended for a flexible hose 13 for admission or aspiration of the electrolyte and the circulation equalization chamber 11.
  • C denotes the direction of circulation of the electrolyte in the circulation chamber 8
  • the distribution chamber 10 has a variable rectangular section whose dimension r1 in a direction parallel to the direction of circulation C decreases progressively from the connection 12 to the circulation equalization chamber 11 while its orthogonal dimension r2 (figure 2) increases on the contrary in the same direction.
  • This arrangement allows a distribution in the best conditions of the electrolyte from the flexible pipe 13 with circular section and in a direction perpendicular to the surface S towards the circulation equalization chamber 11 where the flow is generally parallel to the surface S and whose section is a very elongated rectangle.
  • This circulation equalization chamber 11 extends between the distribution chamber 10 and the circulation chamber 8.
  • its shape is quite complicated and a zone 14 adjacent to the circulation chamber 8 can be distinguished.
  • the flow of the electrolyte takes place parallel to the direction of circulation C, but against the current in zone 14 and in the same direction in the other zone 15.
  • This arrangement is obtained by a baffle plate 16 parallel to the plate 3 of the electrode 2 and which cuts almost entirely the circulation equalization chamber 11.
  • the zones 14 and 15 communicate by an elongated slot 17 close to the median plane P while the circulation equalization chamber 11 and the circulation chamber 8 communicate by another slot 18 delimited by the plate 3 and the seal 6.
  • the zone 14 adjacent to the circulation chamber 8 has a uniform section while the other zone 15 has a section which widens appreciably (as regards the thickness r3 perpendicular to r2) near the connection with the distribution chamber 10 at the location of an oblique surface 19.
  • Figure 6 more fully shows the embodiment and shows in particular that the seal 7 is here rectangular in outline; the slots 17 and 18 are mutually parallel and extend perpendicular to the direction of circulation C, parallel to the dimension r2 of the distribution chambers 10, up to the edges of the joint 6.
  • an electrolyte circulation is created, advantageously under vacuum, at about half an atmosphere, in order to limit the leaks in hydraulic circuit failure.
  • Overpressure or equipressure circulation is possible.
  • Technopal brand hoses or all hoses of similar characteristics can be favorably used for this pressure value.
  • the intake and suction chambers 9a and 9b as described guarantee a gradual passage between the flow conditions in the pipes 13 and those in the circulation chamber 8, so that the flow speed is uniform in this the latter as well along the direction defined by the direction of circulation C as in the perpendicular direction thanks in particular to the enlargement of the distribution chambers 10 along the dimension r2.
  • the renewal of the electrolyte over the entire portion of the surface S treated and circumscribed by the seal 6 is therefore guaranteed, which makes it possible to apply significantly higher current densities without risking damaging the surface S by modifying the composition. chemical of the electrolyte in places where the renewal would be insufficient. Uniform treatment is also ensured.
  • FIG. 3 shows that the suction cup, the essential parts of which were flat in FIGS. 1 and 2, can be provided for surfaces S ′ of uniform curvature.
  • the electrode 2 ′ then has an arcuate plate 3 ′ with a consequent radius of curvature; the baffle plates 16 ′ and the walls of the circulation equalization chambers are also arched accordingly, as well as the joint.
  • FIG. 3 also shows that the suction cups can be correctly pressed onto the surface S or S ′ by an apparatus - described in more detail in French patent 2 607 421 - formed by a longitudinal frame 27 carrying two jacks 28, the rod of each of which grips one of the appendages 5 and the plate on the surface.
  • the frame 27 also carries four tabs 29 at the front, rear, left and right of the suction cup which carry, by a pad 30, on the surface S or S ′.
  • a handle M of which only the end is shown then makes it possible to move the device. Plating can be ensured by any equivalent system and in particular by a remote operator arm.
  • FIGS. 4 and 5 show that it is possible without inconvenience to build suction cups according to the invention in the form of possibly very elongated rectangles.
  • FIG. 4 represents a suction cup which can be used in particular for the treatment of a strip or a metal tube 31 in continuous movement in a direction A perpendicular to the direction of circulation of the electrolyte C; the suction cup is very little extended in direction A, which is admissible since high current densities, causing rapid machining, can be applied without disadvantage.
  • suction cups the width of which is, on the contrary, substantially greater than the length, as shown in FIG. 5, thanks to the capacities for uniformity of flow of the distribution chambers 10.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Electrolytic Production Of Metals (AREA)

Description

L'invention a trait à une ventouse de traitement électrolytique d'une surface et peut s'utiliser d'une façon générale pour tous les traitements qui impliquent la circulation d'un courant d'électrolyte entre la surface et une électrode à un potentiel différent de celui de la surface et à peu de distance, tels que l'électropolissage, l'électrodécontamination, l'électrodécapage, l'électrodéposition ou le traitement anodique.The invention relates to a suction cup for electrolytic treatment of a surface and can be used in general for all treatments which involve the circulation of an electrolyte current between the surface and an electrode at a different potential. from that of the surface and at a short distance, such as electropolishing, electrodecontamination, electrodepalting, electrodeposition or anodic treatment.

Elle constitue en fait un perfectionnement à des ventouses déjà connues (notamment par le brevet français 2 561 672) qui comprennent essentiellement une carcasse généralement isolante électrique et un joint d'étanchéité à contour fermé plaqué contre la surface. La carcasse est creuse et sa cavité renferme deux chambres qui sont délimitées par l'électrode. L'électrolyte circule dans la chambre arrière d'admission puis traverse l'électrode par les trous réalisés dans celle-ci, passe dans la chambre avant où il est mis en contact avec la surface à traiter, qui constitue une paroi de cette chambre avant, et est ensuite aspiré par une canalisation qui traverse la carcasse. L'écoulement est d'une façon générale perpendiculaire à la surface dans la chambre arrière d'admission et la chambre avant. On constate toutefois que l'écoulement n'est parfaitement régulier dans la chambre avant ni pour la vitesse ni pour la direction à cause de la constitution géométrique de la cavité, des chambres et des raccordements, et ceci que l'écoulement à travers l'électrode passe par des trous ou par une fente comme le représentent les figures 1 et 2 du brevet antérieur. Il en résulte que le renouvellement de l'électrolyte n'est pas uniforme sur toute la surface à traiter, ce qui conduit à des hétérogénéités de la vitesse du traitement. On ne peut donc appliquer des densités de courant importantes, ce qui abîmerait la surface à traiter aux endroits où l'écoulement est le plus lent.It in fact constitutes an improvement to suction cups already known (in particular by French patent 2,561,672) which essentially comprise a generally electrically insulating carcass and a seal with a closed contour pressed against the surface. The carcass is hollow and its cavity contains two chambers which are delimited by the electrode. The electrolyte circulates in the rear intake chamber then passes through the electrode through the holes made in it, passes into the front chamber where it is brought into contact with the surface to be treated, which constitutes a wall of this front chamber , and is then sucked by a pipe which crosses the carcass. The flow is generally perpendicular to the surface in the rear intake chamber and the front chamber. However, it can be seen that the flow is not perfectly regular in the front chamber neither for the speed nor for the direction because of the geometrical constitution of the cavity, of the chambers and of the connections, and this only the flow through the electrode passes through holes or through a slot as shown in Figures 1 and 2 of the prior patent. The result that the renewal of the electrolyte is not uniform over the entire surface to be treated, which leads to heterogeneities in the speed of the treatment. It is therefore not possible to apply significant current densities, which would damage the surface to be treated at the places where the flow is the slowest.

L'objet de l'invention est de s'affranchir de ces inconvénients au moyen d'une ventouse de traitement électrolytique dont la conformation géométrique permet d'obtenir un écoulement uniforme dans la chambre de circulation.The object of the invention is to overcome these drawbacks by means of an electrolytic treatment suction cup whose geometrical conformation makes it possible to obtain a uniform flow in the circulation chamber.

La nouvelle ventouse de traitement électrolytique comprend une carcasse généralement isolante électrique, délimitant partiellement une cavité d'électrolyte, la carcasse étant munie d'une électrode installée dans la cavité, de deux raccordements de conduites d'électrolyte débouchant devant deux extrémités de la cavité, d'un joint élastique à contour fermé délimitant partiellement la cavité et destiné à être plaqué contre la surface, l'électrode venant a lors devant la surface à une distance uniforme de celle-ci et séparant la cavité en une chambre de circulation d'électrolyte située entre l'électrode et la surface, une chambre d'admission d'électrolyte située entre la chambre de circulation et un des raccordements et une chambre d'aspiration d'électrolyte située entre la chambre de circulation et l'autre raccordement, la ventouse étant caractérisée en ce que l'électrode est continue et les chambres d'admission et d'aspiration sont constituées chacune d'une chambre d'égalisation de circulation communiquant avec la chambre de circulation par une fente respective, les fentes étant situées sur deux côtés opposés de la chambre de circulation, les chambres de distribution comprenant une partie adjacente à la fente où l'électrolyte s'écoule à contre-courant par rapport à son écoulement dans la chambre de circulation, ainsi que d'une chambre de distribution communiquant avec le raccordement et la chambre d'égalisation de circulation respectifs, les chambres de distribution s'élargissant vers les chambres d'égalisation de circulation dans la direction d'extension des fentes.The new electrolytic treatment suction cup comprises a generally electrically insulating carcass, partially delimiting an electrolyte cavity, the carcass being provided with an electrode installed in the cavity, with two electrolyte pipe connections opening out in front of two ends of the cavity, an elastic joint with a closed contour partially delimiting the cavity and intended to be pressed against the surface, the electrode then coming in front of the surface at a uniform distance from the latter and separating the cavity into an electrolyte circulation chamber located between the electrode and the surface, an electrolyte intake chamber located between the circulation chamber and one of the connections and an electrolyte suction chamber located between the circulation chamber and the other connection, the suction cup being characterized in that the electrode is continuous and the intake and suction chambers are formed cha cune of a circulation equalization chamber communicating with the circulation chamber by a respective slot, the slots being located on two opposite sides of the circulation chamber, the distribution chambers comprising a part adjacent to the slot where the electrolyte flows against the current with respect to its flow in the circulation chamber, as well as a distribution chamber communicating with the connection and the respective circulation equalization chamber, the distribution chambers widening towards the equalization chambers circulation in the direction of extension of the slots.

Dans des réalisations avantageuses de l'invention utilisables séparément ou en combinaison, on peut prévoir que les chambres de distribution rétrécissent vers les chambres d'égalisation de circulation dans une direction perpendiculaire à la direction d'extension des fentes, que les chambres d'égalisation de circulation s'élargissent vers les chambres de distribution dans une direction perpendiculaire à la direction des fentes, qu'elles comprennent une partie adjacente aux chambres de distribution où l'électrolyte s'écoule dans le même sens que dans la chambre de circulation, ou encore que les chambres de circulation sont composées d'un renfoncement adjacent aux chambres de distribution et d'une partie complémentaire s'étendant entre les chambres de distribution et les fentes.In advantageous embodiments of the invention which can be used separately or in combination, provision may be made for the distribution chambers to shrink towards the circulation equalization chambers in a direction perpendicular to the direction of extension of the slots, than the equalization chambers circulation widens towards the distribution chambers in a direction perpendicular to the direction of the slots, that they comprise a part adjacent to the distribution chambers where the electrolyte flows in the same direction as in the circulation chamber, or still that the circulation chambers are composed of a recess adjacent to the distribution chambers and of a complementary part extending between the distribution chambers and the slots.

D'une façon générale, les pièces de la ventouse et notamment l'électrode peuvent être planes ou arquées suivant la courbure de la surface à traiter.In general, the parts of the suction cup and in particular the electrode can be flat or arcuate according to the curvature of the surface to be treated.

On va maintenant décrire l'invention plus en détail à l'aide des figures suivantes annexées à titre illustratif et nullement limitatif :

  • La figure 1 est une vue en coupe de la ventouse selon l'invention qui représente au mieux les écoulements d'électrolyte ;
  • La figure 2 est une vue de la ventouse selon la coupe II-II de la figure 1 ;
  • La figure 3 est une vue simplifiée analogue à la figure 1 et montrant une réalisation arquée de la ventouse ;
  • La figure 4 est une vue de dessus d'une autre réalisation ;
  • La figure 5 est une vue de dessus d'une réalisation différente ; et
  • la figure 6 est une coupe suivant la ligne VIVI de la figure 1.
The invention will now be described in more detail with the aid of the following figures which are annexed by way of illustration and in no way limitative:
  • Figure 1 is a sectional view of the suction cup according to the invention which best represents the electrolyte flows;
  • Figure 2 is a view of the suction cup according to section II-II of Figure 1;
  • Figure 3 is a simplified view similar to Figure 1 and showing an arcuate embodiment of the suction cup;
  • Figure 4 is a top view of another embodiment;
  • Figure 5 is a top view of a different embodiment; and
  • FIG. 6 is a section along the line VIVI of FIG. 1.

La ventouse se compose d'une carcasse 1 en matériau isolant du point de vue électrique, tel que du plastique, et qui est traversée par une électrode 2 qui se termine par une plaque d'électrode 3 plane et continue. L'électrode 2 débouche hors de la carcasse 1 à l'opposé de la surface S à traiter par un câble 4 alimenté en courant continu par un générateur et un redresseur non représentés.The suction cup consists of a carcass 1 of an electrically insulating material, such as plastic, and which is crossed by an electrode 2 which ends in an electrode plate 3 which is flat and continuous. The electrode 2 opens out of the carcass 1 opposite the surface S to be treated by a cable 4 supplied with direct current by a generator and a rectifier not shown.

La carcasse 1 est en outre munie de prises pour la préhension de la ventouse et son plaquage sur la surface S, ici d'appendices 5 opposés, et d'un joint à contour fermé 6 en matériau élastique que l'on applique sur la surface S pour délimiter un volume étanche. A cet effet, le joint 6 comprend avantageusement une chambre à air 7 gonflable dans sa partie adjacente à la surface S.The carcass 1 is further provided with sockets for gripping the suction cup and its pressing on the surface S, here of opposite appendages 5, and of a closed contour seal 6 of elastic material which is applied to the surface S to define a sealed volume. To this end, the seal 6 advantageously comprises an inflatable air chamber 7 in its part adjacent to the surface S.

La carcasse 1 est creuse et délimite avec le joint 6 et la surface S une cavité de circulation d'électrolyte étanche quand la ventouse est en position de travail. La plaque d'électrode 3 s'étend à l'intérieur de la cavité et y délimite une chambre de circulation d'électrolyte 8 avec la surface S. Le reste de la cavité forme une chambre d'admission 9a et une chambre d'aspiration 9b de l'électrolyte, chambres semblables et symétriques, de même d'ailleurs que le reste de la ventouse, par rapport à un plan P per pendiculaire à la surface S et au plan de la figure 1. On va donc décrire indistinctement les deux chambres d'aspiration et d'admission 9b et 9a dans la description qui suit.The carcass 1 is hollow and defines with the seal 6 and the surface S a sealed electrolyte circulation cavity when the suction cup is in the working position. The electrode plate 3 extends inside the cavity and delimits there an electrolyte circulation chamber 8 with the surface S. The rest of the cavity forms an intake chamber 9a and a suction chamber 9b of the electrolyte, similar and symmetrical chambers, as well as the rest of the suction cup, relative to a plane P per pendulum to the surface S and to the plane of Figure 1. We will therefore describe the two suction and intake chambers 9b and 9a without distinction in the following description.

Chacune de ces chambres peut être décomposée en une chambre de distribution 10 et une chambre d'égalisation de circulation 11. La chambre de distribution 10 s'étend entre un raccordement 12 destiné à un tuyau souple 13 d'admission ou d'aspiration de l'électrolyte et la chambre d'égalisation de circulation 11. Si on désigne par C le sens de circulation de l'électrolyte dans la chambre de circulation 8, de la fente 18 associée à la chambre d'admission 9a à celle associée à la chambre d'aspiration 9b, on remarque que la chambre de distribution 10 présente une section rectangulaire variable dont une dimension r1 suivant une direction parallèle au sens de circulation C diminue progressivement du raccordement 12 à la chambre d'égalisation de circulation 11 alors que sa dimension orthogonale r2 (figure 2) s'accroît au contraire dans le même sens. Cette disposition permet une répartition dans les meilleures conditions de l'électrolyte à partir du tuyau souple 13 à section circulaire et dans une direction perpendiculaire à la surface S vers la chambre d'égalisation de circulation 11 où l'écoulement est généralement parallèle à la surface S et dont la section est un rectangle très allongé.Each of these chambers can be broken down into a distribution chamber 10 and a circulation equalization chamber 11. The distribution chamber 10 extends between a connection 12 intended for a flexible hose 13 for admission or aspiration of the electrolyte and the circulation equalization chamber 11. If C denotes the direction of circulation of the electrolyte in the circulation chamber 8, from the slot 18 associated with the intake chamber 9a to that associated with the chamber suction 9b, it can be seen that the distribution chamber 10 has a variable rectangular section whose dimension r1 in a direction parallel to the direction of circulation C decreases progressively from the connection 12 to the circulation equalization chamber 11 while its orthogonal dimension r2 (figure 2) increases on the contrary in the same direction. This arrangement allows a distribution in the best conditions of the electrolyte from the flexible pipe 13 with circular section and in a direction perpendicular to the surface S towards the circulation equalization chamber 11 where the flow is generally parallel to the surface S and whose section is a very elongated rectangle.

Cette chambre d'égalisation de circulation 11 s'étend entre la chambre de distribution 10 et la chambre de circulation 8. Dans la réalisation représentée, sa forme est assez compliquée et on peut distinguer une zone 14 adjacente à la chambre de circulation 8 et une zone 15 adjacente à la chambre de distribution 10. L'écoulement de l'électrolyte s'effectue parallèlement au sens de circulation C, mais à contre-courant dans la zone 14 et dans le même sens dans l'autre zone 15. Cette disposition est obtenue par une plaque de chicane 16 parallèle à la plaque 3 de l'électrode 2 et qui coupe presque entièrement la chambre d'égalisation de circulation 11. Les zones 14 et 15 communiquent par une fente allongée 17 proche du plan médian P alors que la chambre d'égalisation de circulation 11 et la chambre de circulation 8 communiquent par une autre fente 18 délimitée par la plaque 3 et le joint 6.This circulation equalization chamber 11 extends between the distribution chamber 10 and the circulation chamber 8. In the embodiment shown, its shape is quite complicated and a zone 14 adjacent to the circulation chamber 8 can be distinguished. zone 15 adjacent to the distribution chamber 10. The flow of the electrolyte takes place parallel to the direction of circulation C, but against the current in zone 14 and in the same direction in the other zone 15. This arrangement is obtained by a baffle plate 16 parallel to the plate 3 of the electrode 2 and which cuts almost entirely the circulation equalization chamber 11. The zones 14 and 15 communicate by an elongated slot 17 close to the median plane P while the circulation equalization chamber 11 and the circulation chamber 8 communicate by another slot 18 delimited by the plate 3 and the seal 6.

La zone 14 adjacente à la chambre de circulation 8 a une section uniforme alors que l'autre zone 15 a une section qui s'élargit sensiblement (pour ce qui concerne l'épaisseur r3 perpendiculaire à r2) près du raccordement avec la chambre de distribution 10 à l'emplacement d'une surface oblique 19.The zone 14 adjacent to the circulation chamber 8 has a uniform section while the other zone 15 has a section which widens appreciably (as regards the thickness r3 perpendicular to r2) near the connection with the distribution chamber 10 at the location of an oblique surface 19.

On peut encore distinguer dans la chambre d'égalisation de circulation 11 un renfoncement 20 ménagé entre la plaque en chicane 16 et la carcasse 1, adjacent à la zone 15, qu'il prolonge tout en étant séparé de celle-ci par l'embouchure de la chambre de distribution 10. Cette disposition contribue à l'égalisation de la circulation.We can still distinguish in the circulation equalization chamber 11 a recess 20 formed between the baffle plate 16 and the carcass 1, adjacent to the zone 15, which it extends while being separated from the latter by the mouth distribution chamber 10. This arrangement contributes to the equalization of circulation.

La figure 6 représente plus complètement la réalisation et montre en particulier que le joint 7 est ici à contour rectangulaire ; les fentes 17 et 18 sont parallèles entre elles et s'étendent perpendiculairement au sens de circulation C, parallèlement à la dimension r2 des chambres de distribution 10, jusqu'aux bords du joint 6.Figure 6 more fully shows the embodiment and shows in particular that the seal 7 is here rectangular in outline; the slots 17 and 18 are mutually parallel and extend perpendicular to the direction of circulation C, parallel to the dimension r2 of the distribution chambers 10, up to the edges of the joint 6.

En fonctionnement, après avoir branché les tuyaux souples 13 au moyen d'une bride 21 sur les raccordements 12, une circulation d'électrolyte est créée, avantageusement en dépression, à une demi-atmosphère environ, pour limiter les fuites en cas de rupture du circuit hydraulique. Une circulation en surpression ou équipression est possible. Les tuyaux de la marque Technopal ou tous ceux de caractéristiques semblables peuvent favorablement être utilisés pour cette valeur de pression.In operation, after having connected the flexible hoses 13 by means of a flange 21 on the connections 12, an electrolyte circulation is created, advantageously under vacuum, at about half an atmosphere, in order to limit the leaks in hydraulic circuit failure. Overpressure or equipressure circulation is possible. Technopal brand hoses or all hoses of similar characteristics can be favorably used for this pressure value.

Les chambres d'admission et d'aspiration 9a et 9b telles que décrites garantissent un passage graduel entre les conditions d'écoulement dans les tuyaux 13 et celles dans la chambre de circulation 8, si bien que la vitesse d'écoulement est uniforme dans cette dernière aussi bien le long de la direction définie par le sens de circulation C que dans la direction perpendiculaire grâce en particulier à l'élargissement des chambres de distribution 10 suivant la dimension r2. Le renouvellement de l'électrolyte sur toute la portion de la surface S traitée et circonscrite par le joint 6 est donc garanti, ce qui permet d'appliquer des densités de courant sensiblement plus importantes sans risquer d'abîmer la surface S en modifiant la composition chimique de l'électrolyte à des endroits où le renouvellement serait insuffisant. Un traitement uniforme est par ailleurs assuré.The intake and suction chambers 9a and 9b as described guarantee a gradual passage between the flow conditions in the pipes 13 and those in the circulation chamber 8, so that the flow speed is uniform in this the latter as well along the direction defined by the direction of circulation C as in the perpendicular direction thanks in particular to the enlargement of the distribution chambers 10 along the dimension r2. The renewal of the electrolyte over the entire portion of the surface S treated and circumscribed by the seal 6 is therefore guaranteed, which makes it possible to apply significantly higher current densities without risking damaging the surface S by modifying the composition. chemical of the electrolyte in places where the renewal would be insufficient. Uniform treatment is also ensured.

La figure 3 montre que la ventouse, dont les pièces essentielles étaient planes sur les figures 1 et 2, peut être prévue pour des surfaces S′ de courbure uniforme. L'électrode 2′ possède alors une plaque arquée 3′ à un rayon de courbure conséquent ; les plaques de chicane 16′ et les parois des chambres d'égalisation de circulation sont également arquées en conséquence, ainsi que le joint. La figure 3 montre également que les ventouses peuvent être plaquées correctement sur la surface S ou S′ par un appareil -décrit plus en détail dans le brevet français 2 607 421- formé d'un bâti longitudinal 27 portant deux vérins 28 dont la tige de chacun saisit un des appendices 5 et le plaque sur la surface. Le bâti 27 porte également quatre pattes 29 à l'avant, à l'arrière, à gauche et à droite de la ventouse qui portent, par un patin 30, sur la surface S ou S′. Un manche M dont seule l'extrémité est représentée permet ensuite de déplacer l'appareil. Le plaquage peut être assuré par tout système équivalent et en particulier par un bras de téléopérateur.FIG. 3 shows that the suction cup, the essential parts of which were flat in FIGS. 1 and 2, can be provided for surfaces S ′ of uniform curvature. The electrode 2 ′ then has an arcuate plate 3 ′ with a consequent radius of curvature; the baffle plates 16 ′ and the walls of the circulation equalization chambers are also arched accordingly, as well as the joint. FIG. 3 also shows that the suction cups can be correctly pressed onto the surface S or S ′ by an apparatus - described in more detail in French patent 2 607 421 - formed by a longitudinal frame 27 carrying two jacks 28, the rod of each of which grips one of the appendages 5 and the plate on the surface. The frame 27 also carries four tabs 29 at the front, rear, left and right of the suction cup which carry, by a pad 30, on the surface S or S ′. A handle M of which only the end is shown then makes it possible to move the device. Plating can be ensured by any equivalent system and in particular by a remote operator arm.

Alors que les ventouses suivant l'art antérieur sont généralement de forme ovale avec une faible ellipticité, les figures 4 et 5 montrent que l'on peut sans inconvénient construire des ventouses suivant l'invention en forme de rectangles éventuellement très allongés. La figure 4 représente une ventouse qui peut être utilisée notamment pour le traitement d'une bande ou d'un tube métallique 31 en mouvement continu dans une direction A perpendiculaire au sens de circulation de l'électrolyte C ; la ventouse est très peu étendue suivant la direction A, ce qui est admissible puisque des densités de courant élevées, provoquant un usinage rapide, peuvent être appliquées sans inconvénient. On peut également envisager des ventouses dont la largeur est au contraire sensiblement plus importante que la longueur, comme le représente la figure 5, grâce aux capacités d'uniformisation d'écoulement des chambres de distribution 10.While the suction cups according to the prior art are generally oval in shape with a low ellipticity, FIGS. 4 and 5 show that it is possible without inconvenience to build suction cups according to the invention in the form of possibly very elongated rectangles. FIG. 4 represents a suction cup which can be used in particular for the treatment of a strip or a metal tube 31 in continuous movement in a direction A perpendicular to the direction of circulation of the electrolyte C; the suction cup is very little extended in direction A, which is admissible since high current densities, causing rapid machining, can be applied without disadvantage. It is also possible to envisage suction cups, the width of which is, on the contrary, substantially greater than the length, as shown in FIG. 5, thanks to the capacities for uniformity of flow of the distribution chambers 10.

Des équivalents peuvent évidemment être proposés pour divers constituants décrits sans sortir du cadre de l'invention.Equivalents can obviously be proposed for various constituents described without departing from the scope of the invention.

Claims (8)

  1. Suction cup for the electrolytic treatment of a surface (S) comprising a generally electrically insulating casing (1) partly defining an electrolyte cavity, the casing (1) being provided with an electrode (3) installed in the cavity, two connections (12) for electrolyte ducts (13) issuing in front of two ends of the cavity, a closed contour elastic joint (6) partly defining the cavity and being engaged against the surface, the electrode (3) then coming in front of the surface at a uniform distance therefrom and subdividing the cavity into an electrolyte flow chamber (8) located between the electrode and the surface, an electrolyte admission chamber (9a) located between the flow chamber and one of the connections and an electrolyte suction chamber (9b) located between the flow chamber and the other connection, characterized in that the electrode is continuous and the admission and suction chambers are in each case constituted by a flow equalizing chamber (11) communicating with the flow chamber by a respective slot (18), the slots being located on two opposite sides of the flow chamber, the flow equalizing chambers comprising a part (14) adjacent to the slot (18), where the electrolyte flows in countercurrent with respect to its flow in the circulation chamber (8), as well as a distribution chamber (10) communicating with the connection (12) and the flow equalizing chamber, the distribution chambers widening towards the flow equalizing chambers in the extension direction of the slots.
  2. Electrolyte treatment suction cup according to claim 1, characterized in that the distribution chambers narrow towards the flow equalizing chambers in a direction perpendicular to the extension direction of the slots.
  3. Electrolytic treatment suction cup according to either of the claims 1 or 2, characterized in that the flow equalizing chambers widen towards the distribution chambers in a direction perpendicular to the extension direction of the slots.
  4. Electrolytic treatment suction cup according to any one of the claims 1 to 3, characterized in that the flow equalizing chambers (11) comprise a part (15) adjacent to the distribution chambers (10), where the electrolyte flows in the same direction as in the flow chamber (8).
  5. Electrolytic treatment suction cup according to any one of the claims 1 to 4, characterized in that the flow equalizing chambers are constituted by a recess (20) adjacent to the respective distribution chamber (10) and a complementary part extending between distribution chamber (10) and the slot (18).
  6. Electrolytic treatment suction cup according to any one of the claims 1 to 5, characterized in that the slots are parallel.
  7. Electrolytic treatment suction cup according to claim 6, characterized in that the slots (18) are rectilinear and the circulation chamber rectangular.
  8. Electrolytic treatment suction cup according to any one of the claims 1 to 7, characterized in that the joint (6) is inflatable.
EP89403603A 1988-12-23 1989-12-21 Suction cup for the electrolytic treatment of a surface Expired - Lifetime EP0375556B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8817115A FR2641003B1 (en) 1988-12-23 1988-12-23
FR8817115 1988-12-23

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EP0375556A1 EP0375556A1 (en) 1990-06-27
EP0375556B1 true EP0375556B1 (en) 1993-03-10

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EP89403603A Expired - Lifetime EP0375556B1 (en) 1988-12-23 1989-12-21 Suction cup for the electrolytic treatment of a surface

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US (1) US4986889A (en)
EP (1) EP0375556B1 (en)
JP (1) JPH02221400A (en)
DE (2) DE68905314T2 (en)
ES (1) ES2015859T3 (en)
FR (1) FR2641003B1 (en)

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US8465485B2 (en) 2003-03-27 2013-06-18 Terumo Kabushiki Kaisha Energy based devices and methods for treatment of patent foramen ovale
US9468437B2 (en) 1996-08-22 2016-10-18 The Trustees Of Columbia University In The City Of New York Endovascular flexible stapling device

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US8021362B2 (en) * 2003-03-27 2011-09-20 Terumo Kabushiki Kaisha Methods and apparatus for closing a layered tissue defect
US20040267191A1 (en) * 2003-03-27 2004-12-30 Cierra, Inc. Methods and apparatus for treatment of patent foramen ovale
US7165552B2 (en) * 2003-03-27 2007-01-23 Cierra, Inc. Methods and apparatus for treatment of patent foramen ovale
US7972330B2 (en) 2003-03-27 2011-07-05 Terumo Kabushiki Kaisha Methods and apparatus for closing a layered tissue defect
US6939348B2 (en) 2003-03-27 2005-09-06 Cierra, Inc. Energy based devices and methods for treatment of patent foramen ovale
US7293562B2 (en) * 2003-03-27 2007-11-13 Cierra, Inc. Energy based devices and methods for treatment of anatomic tissue defects
US7311701B2 (en) * 2003-06-10 2007-12-25 Cierra, Inc. Methods and apparatus for non-invasively treating atrial fibrillation using high intensity focused ultrasound
US7367975B2 (en) * 2004-06-21 2008-05-06 Cierra, Inc. Energy based devices and methods for treatment of anatomic tissue defects
US8109274B2 (en) * 2005-04-11 2012-02-07 Terumo Kabushiki Kaisha Methods and electrode apparatus to achieve a closure of a layered tissue defect
US20080140069A1 (en) * 2006-12-07 2008-06-12 Cierra, Inc. Multi-electrode apparatus for tissue welding and ablation
JP6231879B2 (en) * 2013-12-27 2017-11-15 マルイ鍍金工業株式会社 Partial polishing jig
CN107532323B (en) * 2015-05-08 2019-07-12 株式会社日立制作所 Wet type surface processing device
DE102018109531A1 (en) 2018-04-20 2019-10-24 Christian-Albrechts-Universität Zu Kiel Adhesive joining device and adhesive joining method for a metallic surface

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DE3345278A1 (en) * 1983-12-14 1985-06-27 Kraftwerk Union AG, 4330 Mülheim DEVICE FOR ELECTROPOLISHING THE INTERNAL SURFACE OF HOLLOW CYLINDRICAL BODIES
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US4750981A (en) * 1986-09-30 1988-06-14 The Boeing Company Apparatus for electroplating limited surfaces on a workpiece
FR2607421B1 (en) * 1986-12-01 1989-03-24 Electricite De France DEVICE FOR EXPLORING AND / OR TREATING A CURVED SMOOTH SURFACE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9468437B2 (en) 1996-08-22 2016-10-18 The Trustees Of Columbia University In The City Of New York Endovascular flexible stapling device
US8465485B2 (en) 2003-03-27 2013-06-18 Terumo Kabushiki Kaisha Energy based devices and methods for treatment of patent foramen ovale

Also Published As

Publication number Publication date
US4986889A (en) 1991-01-22
ES2015859A4 (en) 1990-09-16
DE68905314T2 (en) 1993-09-09
ES2015859T3 (en) 1993-10-16
JPH02221400A (en) 1990-09-04
EP0375556A1 (en) 1990-06-27
DE68905314D1 (en) 1993-04-15
FR2641003B1 (en) 1991-04-05
DE375556T1 (en) 1990-11-29
FR2641003A1 (en) 1990-06-29

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