EP0717793B1 - Dispositif d'oxydation anodique de pieces - Google Patents

Dispositif d'oxydation anodique de pieces Download PDF

Info

Publication number
EP0717793B1
EP0717793B1 EP94926927A EP94926927A EP0717793B1 EP 0717793 B1 EP0717793 B1 EP 0717793B1 EP 94926927 A EP94926927 A EP 94926927A EP 94926927 A EP94926927 A EP 94926927A EP 0717793 B1 EP0717793 B1 EP 0717793B1
Authority
EP
European Patent Office
Prior art keywords
workpieces
carrier
electrolyte
receiving means
cathode
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
Application number
EP94926927A
Other languages
German (de)
English (en)
Other versions
EP0717793A1 (fr
Inventor
Helmut Steins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stohrer Doduco GmbH and Co
Original Assignee
Stohrer Doduco GmbH and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19934330346 external-priority patent/DE4330346C1/de
Application filed by Stohrer Doduco GmbH and Co filed Critical Stohrer Doduco GmbH and Co
Publication of EP0717793A1 publication Critical patent/EP0717793A1/fr
Application granted granted Critical
Publication of EP0717793B1 publication Critical patent/EP0717793B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/06—Suspending or supporting devices for articles to be coated
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/005—Apparatus specially adapted for electrolytic conversion coating

Definitions

  • the invention relates to a device for anodizing workpieces with the features specified in the preamble of claim 1.
  • Anodic oxidation is understood to mean processes in which oxide layers adhering to metallic workpieces by anodic treatment in aqueous electrolyte are produced, in particular on workpieces made of aluminum or aluminum alloys.
  • Aluminum inherently has a relatively good corrosion resistance, because it quickly coats in air with a thin, approx. 0.01 to 0.04 ⁇ m thick, hard and extraordinarily strong oxide film, which due to its high hardness also works well Wear layer would be suitable if it were not so thin.
  • Anodic oxidation can produce thicker oxide layers which are suitable as wear layers and which are harder the lower the temperature at which the anodic oxidation takes place.
  • the side view of the brake calipers is approximately U-shaped with mounting holes on one leg of the U and with a cylindrical blind hole on the opposite leg of the U.
  • the blind hole is intended to receive a piston to form a pressure medium cylinder.
  • the cylindrical outer surface of the blind hole is therefore subject to friction and should therefore receive a hard, anodically applied oxide layer.
  • the Brake calipers are suspended from one of their mounting holes on a hook of the diving frame and then hang more or less obliquely on the diving frame, with which they are immersed in the electrolyte liquid for anodizing.
  • the present invention has for its object to overcome these disadvantages by a device for anodic oxidation of workpieces which is easier to handle, which delivers more uniform oxide layers on the workpieces and at the same time requires less machining work on the workpieces and thus enables less expensive work.
  • the carrier for the workpieces has receiving devices which are arranged and designed such that the received workpieces are inevitably arranged with a predetermined orientation in a predetermined position, preferably are regularly aligned in the same way.
  • This is also a first step to make the operation of the device more efficient, which is further achieved according to the invention in that, in combination with the forced alignment of the workpieces on their carrier, the anodes are also arranged accordingly and arranged to be raised and lowered independently of the carrier are so that they can be brought into contact with the workpieces, which have already been introduced into the container with the carrier, by preferably lowering them together, so that a previous individual connection of the workpieces on the carrier to their respective anode is not necessary.
  • a common cathode, which is immersed in the electrolyte liquid, can be assigned to several or all of the anodes.
  • a plurality of cathodes to be provided in accordance with the number of workpieces or the wear surfaces to be treated, and to be arranged so that they can be raised and lowered so that they can be lowered by preferably simultaneously lowering the workpieces and their holders, depending on the arrangement of the receiving devices of the carrier can be approximated.
  • the cathodes and / or anodes and / or electrolyte feed lines are preferred are combined with the electrolyte supply lines, attached to the underside of a common holder, preferably to the underside of a lid, which closes the container during the anodizing.
  • anodes, cathodes, electrolyte feed lines and also the suction lines can be guided together to the workpieces to be oxidized and also removed again, the lid being easily guided into the desired position through the edge of the container on which it rests.
  • the workpiece carrier In order for the anodes, cathodes and electrolyte leads to meet the workpieces exactly, the workpiece carrier must of course also assume a predetermined position in the container, for which purpose guides and / or positioning elements, for example supports with index pins, which engage in matching recesses in the carrier, are preferably used in the container. are provided.
  • the anodes make reliable contact with the workpieces, they are preferably spring-mounted so that they can retreat against spring force when they hit the workpieces.
  • the workpieces are not arranged in a disordered manner, but rather are arranged in a predetermined position on a carrier and are contacted in this position by the anodes attached to another carrier, in particular to a cover of the device there are reproducible conditions under which the anodically produced oxide layers grow.
  • the workpieces are therefore oxidized more uniformly, more reproducibly and require less reworking, especially if, as is preferred, each workpiece is assigned its own cathode, which can be set together with the anodes, and thus the same oxidation conditions are created for all workpieces.
  • the cathodes are then preferably also designed as an electrolyte feed line, i.e. the cathodes are tubes through which the electrolyte flows.
  • the arrangement of cathode and electrolyte feed line is compact and at the same time the cathode is optimally cooled by the electrolyte.
  • a suction line is provided, it preferably runs coaxially in the electrolyte feed line with its front end section, in particular if the electrolyte feed line is also a cathode. In this case the arrangement is particularly compact.
  • the cathodes are expediently arranged in the vicinity of the wear surfaces. If, as is the case with a brake caliper, the wear surface lies in a recess in the workpiece, the best way to arrange the workpieces on the carrier is in such a way that the recesses match with them Point the opening upwards so that the cathodes assigned to the workpieces can be inserted into the recesses from above by lowering.
  • the cathodes are at the same time an electrolyte feed, the workpieces do not need to be immersed in an electrolyte bath, but the recess to be oxidized, in which the wear surface is located, can be flooded and thereby selectively oxidized.
  • the cathode is always in the immediate vicinity of the wear surface to be oxidized and, unlike in the prior art, the wear surface is not shielded from the electrical field emanating from the cathode.
  • the desired oxide layer grows very evenly on the wear surface. It is accepted that other surface areas of the workpiece are anodized less or not at all. But there is no disadvantage, because the wear surface is definitely anodized and for the other surfaces that are not wear surfaces, the natural atmospheric oxidation is already sufficient as corrosion protection.
  • the concentration of the anodic oxidation on the wear surfaces located in the recesses is even extremely advantageous because it means considerable energy savings in anodic oxidation.
  • the preferred feature also contributes to the uniformization of the layer thickness during anodic oxidation, that the electrolyte is fed directly to the workpiece through an electrolyte feed line assigned to the respective cathode. This not only avoids the formation of diffusion barriers, but the constant introduction of fresh electrolyte cools the cathode and the workpiece, thereby promoting the formation of a particularly hard oxide layer.
  • Another advantage of this measure is that the anodic oxidation no longer has to be carried out by immersing the workpiece in the electrolyte; since the electrolyte is introduced directly into the upwardly open recess in which the wear surface lies, the workpiece can be selectively flooded in the region of the recess.
  • the recess is a blind hole like a brake caliper
  • the blind hole automatically fills up with the electrolyte and the excess of the electrolyte overflows over the edge of the blind hole and is collected in the container below the workpiece carrier.
  • This also works without problems if there is a small hole at the bottom of the blind hole, as is known for brake calipers, through which electrolyte can drain, because you then only have to supply more electrolyte than can run off at the same time. This even has the advantage that the recess easily runs empty at the end of the anodizing process.
  • Workpieces that have a recess that is open at the bottom can be selected just as easily in the device according to the invention Coat anodically by forming the carrier so that it closes the recess in the workpieces positioned on it. In addition, it is possible to suck the electrolyte out of the recess if one does not want it to overflow and / or if it does not run off easily through a drain opening.
  • the selective anodizing described is particularly economical.
  • brake calipers as an example, it was estimated that when the blind hole is selectively anodized, only about 1/8 of the surface of a brake caliper is anodized compared to the prior art, in which the brake calipers are anodically oxidized as a whole. This means that only about 1/8 of the electrical power is required for anodizing.
  • the resulting heat of electricity is only about 1/8 and thus the cooling power that is used to keep the electrolyte at a low temperature (0 ° to 2 ° C) for generating a hard oxide layer is correspondingly low.
  • the system shown in FIG. 1 has four containers 1, 2, 3 and 4 arranged in a row one behind the other, which can be loaded by a carriage 5 which can be moved there and on which a lifting device 6 is located.
  • the workpieces - in the present case it is brake calipers 7 made of an aluminum material - are cleaned, in the second container 2 they are rinsed, in the third container 3 they are anodized and in the fourth container 4 they are rinsed again.
  • the container 3 a container covered by a cover 8 for receiving an aqueous electrolyte 9, for example 20% sulfuric acid.
  • the container 3 has an edge 11, from which some positioning pins 12 protrude upward at predetermined locations.
  • the edge 11 serves to receive a workpiece carrier 13, for example a pallet 13a with a suspension, which has centering holes for receiving the pins 12.
  • the workpiece carrier 13 is designed such that its pallet 13a hangs above the electrolyte level 10.
  • the carrier 13 has upright supports 14 for receiving the brake calipers 7 at predetermined locations, and for this purpose the supports 14 have a cylindrical diameter which is reduced for this purpose Head 15, which fits into a bore 16 of the brake caliper, the edge of the bore 16th rests on the collar surface which is formed at the transition from the support 14 to its head. Two such supports 14 each accommodate a brake caliper 7 in the position defined thereby.
  • the brake caliper 7 is an approximately U-shaped structure in a side view, a cylindrical recess 17 being formed on one leg and the opposite leg being in the form of a fork 18, in each of whose prongs there is a threaded bore 19.
  • anodes 20 and a cathode 21, which is hollow, are attached for each caliper 7; the passage 22 through the cathode 21 serves as an electrolyte feed line.
  • the cathodes protrude vertically downwards and, when the lid 8 is placed on the edge of the container 3, are inserted coaxially through the space between the two prongs of the fork 18 into the cylindrical recess 17 of each brake caliper 7, so that the downward Pointing outlet opening of the electrolyte line 22 is close to the bottom of the cylindrical recess 17.
  • the anodes 20 make contact with the upper leg of the brake caliper 20.
  • the anodes 20 are spring-loaded so that they can move back somewhat when they strike the brake caliper, so that the contact pressure is released the spring pressure is determined.
  • the anodes 20, the cathodes 21 and the electrolyte feed lines 22 are fastened to a suspension 23, which in turn is attached to the underside of the cover 8.
  • the electrolyte is supplied via a common line 24 branching to the hollow cathodes 21, which partially runs in the cover 8 and is connected to this with a hose 25 which leads to a circulating pump 27 which conveys the electrolyte liquid.
  • the anodes 20 and the cathodes 21 are connected to stationary electrical connection contacts at the edge of the container 3 via an electrical feed line running in the cover 8.
  • the hose 25 forms a loop 26 when the cover 8 is placed on it, which makes it possible to lift the cover 8 without loosening the hose connection (as shown in FIG.
  • the cylindrical inner surface 31 of the recess 17 is a wear surface that is to be anodically oxidized.
  • the pump 27 pumps electrolyte liquid through the hollow cathode 21 into the upwardly open recess 17, in which it rises up to its edge and then overflows into the electrolyte reservoir 9 of the container.
  • the wear surface 31 is anodically oxidized, but not other dimensionally machined surfaces, such as the bores 16 or 19, which do not require any reworking.
  • the current heat released by the current flow between anode 20 and cathode 21 is dissipated by the overflowing electrolyte and discharged from the electrolyte by a cooling device 32 provided in the lower region of the container, so that it remains cold and particularly hard oxide layers can be achieved.
  • FIGS. 4 to 6 differs from the system shown in Figures 1 to 3 essentially in that it is a continuous system with horizontal loading. Parts which correspond to parts in the first system are designated in FIGS. 4 to 6 with the same reference numbers as in FIGS. 1 to 3.
  • the workpieces 7 to be machined are arranged in a predetermined position and orientation on a carrier 13 which looks similar to that in FIG the facility.
  • the system has a loading and unloading station 50, in which the carriers 13 are equipped with the workpieces 7. This is followed by a turntable 51, which rotates the carrier 13 by 90 ° into the correct orientation for transfer to a buffer section 52, which they step through until they are transferred at the end by a cross conveyor 53 to the loading device 54 of the actual one Treatment section 55.
  • This treatment section has a number of different treatment containers, including a container 3 for the anodic oxidation of the workpieces 7.
  • a removal device 54a At the outlet of the treatment section 55 there is a removal device 54a, a cross conveyor 53a, a buffer section 52a, and a turntable 51 between the latter and the loading and unloading station 50, as on the inlet side.
  • the container In order to be able to convey the carrier 13 with the workpieces 7 into and out of the container 3, the container has two weirs 56 and 57 above the electrolyte level 9.
  • the carrier 7 runs well guided on rollers 58 in rails 59 arranged laterally next to the container 3 through weir 56 into container 3. It is positioned in the container 3 by means of position elements, for example by means of a stop.
  • On one side next to the Support structure 60 provided for container 3 is a lifting cross-member 61 which crosses container 3 and is slidably mounted up and down, on which are located cathodes 21, anodes 20 and electrolyte feed lines 22, 24. The lifting traverse 61 is raised during the retraction and extension of the carrier 13 (FIG.
  • the supporting structure 60 carries a hood 62 which overlaps the container 3 and which can be suctioned through a channel 63.
  • the exemplary embodiment shown in FIGS. 7 to 9 is similar to the exemplary embodiment shown in FIGS. 1 to 3. Corresponding or corresponding parts are therefore identified by the same reference numbers.
  • the device shown in FIGS. 7 to 9 differs from the device shown in FIGS. 1 to 3 in that a separate cathode is not hung on the cover 8 for each workpiece 7; rather, there is in the container 3 a stationary cathode 21 which is not connected to the cover 8 and which is continuously immersed in the electrolytic bath 9.
  • the anodes 20 are fastened under the cover 8 to a suspension 23 connected to the latter.
  • helical springs which contact the workpieces 7 on their upper side without further ado when the cover 8 is placed, the spring force ensuring reliable contact.
  • the workpieces shown are again calipers.
  • the invention is not limited to the treatment of brake calipers, rather these are only shown as examples.
  • a cable 28 is provided which, coming from a power source (not shown), leads into the lid 8, with the lid placed on (FIG. 7) one on the outside of the container hanging loop 26 forms and thereby allows lifting of the cover 8 by means of the hoist 6 on the carriage 5 without disconnecting the electrical connection.
  • the device shown in FIGS. 10 and 11 is similar to the device shown in FIGS. 5 and 6; therefore the same or corresponding parts are designated with the same reference numerals.
  • the device can be part of a system as shown in Figure 4.
  • the device shown in FIGS. 10 and 11 does not have a separate cathode for each of the workpieces 7, but rather a stationary cathode 21 that is separate from the lifting traverse 61.
  • the anodes 20 are like in the example according to FIGS. 7 to 9 coil springs, which are placed on the top of the workpieces 7 with pressure by lowering the lifting crossmember 61 and supplied with current by a cable 28 traveling with the lifting crossmember 61.
  • the device according to FIGS. 10 and 11 is used for the anodic treatment of workpieces by completely immersing them in the electrolyte.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

L'invention concerne un dispositif d'oxydation anodique de pièces (7) qui comprend un récipient (3) destiné à recevoir un électrolyte aqueux (9), un support (13) pourvu d'éléments (14) destinés à recevoir plusieurs pièces (7), des éléments permettant d'introduire le support (13) dans le(s) récipient(s) (3) et de l'en ressortir. Le support (13) se présente de manière à recevoir les pièces (7) selon une disposition régulière prédéfinie. Il est prévu au moins un anode (20) par pièce. Les anodes (20) peuvent être élevées et abaissées indépendamment du support (13), de manière à être acheminées en ordre déterminé jusqu'aux pièces (7) après introduction du support (13) dans le récipient (3).

Claims (11)

  1. Dispositif pour l'oxydation anodique de pièces à usiner (7), en particulier d'étriers de freins à disques,
    comprenant un récipient (3) pour la réception d'un électrolyte aqueux (9),
    un support (13) qui possède des mécanismes de préhension (14) destinés à saisir plusieurs pièces à usiner (7), qui sont disposés d'une façon prédéterminée et qui sont réalisés de telle sorte qu'ils saisissent les pièces à usiner (7) dans une position prédéterminée,
    des moyens (5, 6, 58) pour introduire et retirer le support (13) dans le, respectivement hors du récipient (3),
    au moins une anode (20) qui doit venir se relier aux pièces à usiner (7), ainsi qu'une cathode (21) immergée dans l'électrolyte,
    caractérisé en ce que
    les anodes (20) peuvent se soulever et s'abaisser indépendamment du support (13) et sont disposées dans un agencement opposé par rapport à l'agencement des mécanismes de préhension (14) de telle sorte que, par abaissement, elles peuvent venir se placer par-dessus les pièces à usiner (7).
  2. Dispositif selon la revendication 1, caractérisé en ce que le récipient (3) possède des guidages (59), respectivement des éléments de positionnement (12) pour le support (13).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'aux mécanismes de préhension (14), est attribuée au moins une cathode (21) pour chacune des pièces à usiner (7), et les cathodes (21) peuvent se soulever et s'abaisser indépendamment du support (13) et sont disposées dans un agencement opposé par rapport à l'agencement des mécanismes de préhension (14) de telle sorte qu'elles peuvent s'approcher des mécanismes de préhension (14) par abaissement.
  4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les cathodes (21) sont réalisées sous forme de conduit d'amenée d'électrolyte.
  5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un conduit d'aspiration est attribué à chaque conduit d'amenée d'électrolyte (22).
  6. Dispositif selon la revendication 5, caractérisé en ce que la section terminale du conduit d'aspiration tournée vers la pièce à usiner (7) s'étend dans le conduit d'amenée d'électrolyte (22) et, en fait, de préférence en position coaxiale.
  7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le récipient (3) possède un couvercle (8) qui peut être soulevé, au côté inférieur duquel sont suspendus les cathodes (21) et/ou les anodes (20) et/ou les conduits d'amenée d'électrolyte (22, 24) et éventuellement le conduit d'aspiration.
  8. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le récipient (3) est surplombé d'une traverse (61) à laquelle sont suspendus les cathodes (21), les anodes (20), les conduits d'amenée d'électrolyte (22, 24) et éventuellement les conduits d'aspiration.
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que les conduits d'amenée d'électrolyte (22, 24) et éventuellement les conduits d'aspiration sont raccordés à un conduit flexible (25) qui accompagne les mouvements du couvercle (8) lors de l'ouverture et de la fermeture du récipient (3).
  10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les anodes (20) sont montées pour être élastiques.
  11. Dispositif pour l'oxydation anodique de pièces à usiner (7) dont une surface résistant à l'usure (31) est disposée dans un évidement (17) de la pièce à usiner (7), en particulier d'étriers de freins à disques,
    comprenant un récipient (3) pour la réception d'un électrolyte aqueux (9),
    un support (13) muni de mécanismes de préhension (14) pour saisir plusieurs pièces à usiner (7),
    des moyens (5, 6, 58) pour introduire et retirer le support (13) dans le, respectivement hors du récipient (3),
    au moins une anode (20) qui doit venir se relier aux pièces à usiner (7), ainsi qu'une cathode (21) immergée dans l'électrolyte,
    caractérisé en ce que le support (13) possède des mécanismes de préhension (14) pour les pièces à usiner (7), qui sont disposés d'une manière prédéterminée et qui sont réalisés de telle sorte qu'ils saisissent les pièces à usiner (7) par un évidement (17) ouvert vers -le haut, en ce qu'au moins une cathode (21) est attribuée aux mécanismes de préhension (14) pour chacune des pièces à usiner (7) et les cathodes (21) peuvent se soulever et s'abaisser indépendamment du support (13) et sont disposées dans un agencement opposé par rapport à l'agencement des mécanismes de préhension (14), en ce qu'elles peuvent, par abaissement, s'insérer dans les évidements (17), en ce que, à chaque cathode (21), est attribué un conduit d'admission d'électrolyte (22) immergée conjointement avec cette dernière dans l'évidement respectif (17), et en ce que les anodes (20) peuvent se soulever et s'abaisser indépendamment du support (13) et sont disposées dans un agencement opposé par rapport à l'agencement des mécanismes de préhension (14) de telle sorte que, en s'abaissant, elles peuvent venir se placer par-dessus les pièces à usiner (7).
EP94926927A 1993-09-08 1994-09-08 Dispositif d'oxydation anodique de pieces Expired - Lifetime EP0717793B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4330346 1993-09-08
DE19934330346 DE4330346C1 (de) 1993-09-08 1993-09-08 Vorrichtung zum anodischen Oxidieren von Werkstücken
DE9405190 1994-03-26
DE9405190U 1994-03-26
PCT/EP1994/003010 WO1995007376A1 (fr) 1993-09-08 1994-09-08 Dispositif d'oxydation anodique de pieces

Publications (2)

Publication Number Publication Date
EP0717793A1 EP0717793A1 (fr) 1996-06-26
EP0717793B1 true EP0717793B1 (fr) 1997-04-09

Family

ID=25929319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94926927A Expired - Lifetime EP0717793B1 (fr) 1993-09-08 1994-09-08 Dispositif d'oxydation anodique de pieces

Country Status (3)

Country Link
EP (1) EP0717793B1 (fr)
DE (1) DE59402399D1 (fr)
WO (1) WO1995007376A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664771A (en) * 1985-05-15 1987-05-12 Criton Technologies Anodizing clip
US5084155A (en) * 1990-08-28 1992-01-28 The Boeing Company Racking equipment for processing parts through anodizing, painting and the like
US5076903A (en) * 1991-02-11 1991-12-31 Sequel Corporation Anodizing rack and clamps

Also Published As

Publication number Publication date
EP0717793A1 (fr) 1996-06-26
DE59402399D1 (de) 1997-05-15
WO1995007376A1 (fr) 1995-03-16

Similar Documents

Publication Publication Date Title
EP0254962B1 (fr) Dispositif pour l'électroplacage des articles en forme de plaques, en particulier des plaques de circuits imprimés
DE4324330C2 (de) Verfahren zum elektrolytischen Behandeln von insbesondere flachem Behandlungsgut, sowie Anordnung, insbesondere zur Durchführung dieses Verfahrens
DE10063624A1 (de) Plattierungssystem und Plattierungsverfahren
DE3142739A1 (de) Vorrichtung zur elektrolytischen oberflaechenbehandlung von mechanischen teilen, insbesondere von zylindern von verbrennungsmotoren
DE10241619B4 (de) Vorrichtung und Verfahren zum elektrolytischen Behandeln von zumindest oberflächlich elektrisch leitfähigem Behandlungsgut
DE3737176C2 (fr)
DE2537256A1 (de) Vorrichtung zum galvanischen abscheiden von aluminium
DE102008063187A1 (de) Anodisierungsvorrichtung
DE4330346C1 (de) Vorrichtung zum anodischen Oxidieren von Werkstücken
EP1889951B1 (fr) Appareil et procédé pour l'anodisation de pièces à usiner
DE19713203C1 (de) Vorrichtung und Verfahren zum Oberflächenbehandeln durch Tauchen
EP1115912B1 (fr) Dispositif pour le traitement electrochimique partiel d'objets sous forme de barres
EP0717793B1 (fr) Dispositif d'oxydation anodique de pieces
EP0261372B1 (fr) Procédé et appareil pour transporter des articles en forme de plaques
DE4108297A1 (de) Verfahren und einrichtung zur oberflaechenbehandlung eines halbgleitlagers
EP0716718B1 (fr) Dispositif de revetement electrophoretique de la surface interieure de corps creux
DE10224817B4 (de) Verfahren und Vorrichtung zum vertikalen Eintauchen von folienartigem Behandlungsgut in Bädern von Galvanisier- und Ätzanlagen
EP0874921A1 (fr) Procede et installation de traitement electrochimique d'objets longilignes
DE19834245B4 (de) Vorrichtung zum elektrolytischen Beschichten
DE19932785C1 (de) Verfahren und Vorrichtung zum präzisen Justieren von Abschirmmasken bei der elektrochemischen Behandlung von stabförmigem Behandlungsgut
DE1490985C2 (de) Anordnung zur Herstellung von gedruckten Stromkreisen
DE451623C (de) Galvanisches Bad mit wandernden Kathoden
DE1496876C (de) Vorrichtung zur elektrolytischen Behandlung von Waren
DE3731963A1 (de) Anlage bzw. verfahren zur herstellung einer laufflaechenbewehrung an zylindern
DE10061226A1 (de) Verfahren und Vorrichtung zur Behandlung von Waren in einem Tauchbad

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19960320

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE FR LI NL

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19960809

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE FR LI NL

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59402399

Country of ref document: DE

Date of ref document: 19970515

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: WILLIAM BLANC & CIE CONSEILS EN PROPRIETE INDUSTRI

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20000918

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20000922

Year of fee payment: 7

Ref country code: BE

Payment date: 20000922

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20000926

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010827

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010930

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010930

BERE Be: lapsed

Owner name: STOHRER-DODUCO G.M.B.H. & CO.

Effective date: 20010930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020401

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020531

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20020401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030401

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20020401