EP0874921B1 - Procede et installation de traitement electrochimique d'objets longilignes - Google Patents

Procede et installation de traitement electrochimique d'objets longilignes Download PDF

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Publication number
EP0874921B1
EP0874921B1 EP97940064A EP97940064A EP0874921B1 EP 0874921 B1 EP0874921 B1 EP 0874921B1 EP 97940064 A EP97940064 A EP 97940064A EP 97940064 A EP97940064 A EP 97940064A EP 0874921 B1 EP0874921 B1 EP 0874921B1
Authority
EP
European Patent Office
Prior art keywords
electrode
sealing means
mask
cavity
region
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
EP97940064A
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German (de)
English (en)
Other versions
EP0874921A1 (fr
Inventor
Rudolf Kauper
Thomas Lummer
Wolfgang Richter
Reinhard Silberhorn
Manfred Krepelka
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.)
Atotech Deutschland GmbH and Co KG
Original Assignee
Atotech Deutschland GmbH and Co KG
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 DE19632132A external-priority patent/DE19632132C1/de
Application filed by Atotech Deutschland GmbH and Co KG filed Critical Atotech Deutschland GmbH and Co KG
Publication of EP0874921A1 publication Critical patent/EP0874921A1/fr
Application granted granted Critical
Publication of EP0874921B1 publication Critical patent/EP0874921B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/02—Electroplating of selected surface areas
    • C25D5/022—Electroplating of selected surface areas using masking means
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/04—Tubes; Rings; Hollow bodies

Definitions

  • the invention relates to a method and an apparatus for electrochemical Treat elongated objects, especially electrochemical ones Etching or metallizing preferably rod-shaped Material to be treated.
  • elongated cylinders for example vehicle shock absorbers, Piston rods or poppet valve stems to improve Treating wear and corrosion properties electrochemically.
  • the rods are only on the in Surfaces later subjected to electrolytic stress with hard chrome coated. The remaining areas of the rods should be uncoated or almost remain uncoated.
  • the surface of the rods is previously electrochemically etched. Insoluble electrodes are preferably used for both process steps used.
  • the rods are preferably treated in immersion baths, treatment solution adhering to the rods after the treatment is rinsed off again.
  • a transport device takes care of the transport the bars from bathroom to bathroom.
  • the bars may only be chrome-plated in the middle area, they must be End masked, that is, shielded so that to exactly predetermined Areas of the rods no metal is deposited.
  • the limits between the areas to be coated and the areas not to be coated are specified, with small tolerances to be observed:
  • shock absorber cylinders the transition between the to be coated and the areas not to be coated, for example within +/- 3 Millimeters are observed.
  • the hard chrome layer must be up to this Borders evenly thick. A layer thickness increase or - Decrease at the borders must be avoided. Furthermore, the layer be very evenly thick over the entire circumference of the rod in order to Avoid machining by grinding.
  • the rods are attached to racks, which in turn are attached to transportable Goods carriers are attached.
  • the frames are provided with individual masks, so that both rod ends are not coated in the intended area become. Since different shock absorber cylinders with variable rod lengths, -diameters and coating areas in the central rod area masks and frames must be kept in sufficient numbers become.
  • the frames are loaded with the rods by hand, since the large range of products found in practice is one Automation is difficult to access.
  • the frame technology is also because of the two-part masks to be used, including power supplies, disadvantageous.
  • One use tubular electrodes for enclosing the rod in the electrochemical Cell is not possible with the known frames because one on the frame Rod usually attached on both sides not in such an electrode can be introduced. For this reason, the electrodes are divided and only face the bars on two sides. As a result, is on no uniformly thick layer was deposited on the rods: on the Areas opposite electrodes on the rods will be thicker Layer deposited than in the other areas. For this reason the unevenly coated rod has to be re-ground afterwards. When coating with hard chrome, this provides subsequent mechanical Processing is an essential cost factor.
  • Electroplating frame for receiving a plurality of rod-shaped, preferably cylindrical objects, such as piston rods, been proposed.
  • the received in sleeve-shaped receiving parts cylindrical rods should be as uniform as possible on the circumference Layer thickness are coated.
  • anodes cause an elliptical layer thickness distribution, it is proposed to use the rods during electrochemical Treatment to rotate around its longitudinal axis.
  • the electroplating frame is designed so that it can be adjusted by vertically adjustable side panels the rod length can be adjusted.
  • the present invention is therefore based on the problem, the disadvantages to avoid the known methods and devices and in particular uniform electrochemical treatment of the elongated Objects, a simple shielding of the objects at the not too areas to be treated, with an exact limitation of the areas to be treated Areas with narrow tolerances are reached, a low carryover of the treatment liquids and rinsing water from a bath into the subsequent and an inexpensive electrochemical treatment of Allow objects with different dimensions.
  • Many objects should be editable at the same time.
  • the invention is limited not on the treatment of round bars; it can also be objects with other cross sections.
  • the single cell comprises in essentially an electrode with a cavity, which is preferably tubular is trained. This is arranged essentially vertically in the immersion bath. This allows the rods to be in a preferably vertical position are lowered into the plunge bath and lifted out of it again, so that the carryover from one bath to the next is minimized.
  • Each rod is inserted into such a single cell.
  • the tubular electrodes are as long as it is for the longest to be treated Rod is required.
  • Another option is the electrochemical area to be treated on the object by the immersion depth of the object in the immersion bath.
  • the shield mask is considered to partially enclose the object in the axial direction Envelope trained.
  • the area to be treated is also a sealant on the shielding mask provided that abuts the wall of the cavity.
  • the case is preferably tubular.
  • the mask closes in the axial direction with the preferably in the form of a sleeve formed sealant. At least the rod to be treated becomes concentric through an upper sleeve retracted into the electrode until the product carrier is put down.
  • the sealant has an opening for inserting the object.
  • the sleeve is circular and the opening is provided in the middle of the cuff.
  • the shield mask is held in the immersion bath by a suitable means (holder).
  • additional a lower shielding mask can be arranged in the electrodes.
  • the bath flow is over the product carrier and over the electrically conductive Gripper fed to the objects.
  • the individual electrodes are single or jointly connected to the opposite pole of the bath power source.
  • the gripper for the object essentially comprises a fixed one and a movable leg and jaws attached to the legs. The object is closed by a clamping force on the jaws exercising agent seized.
  • the rods can be lifted out of the bath and transferred to the subsequent treatment bath without wasting time because the treatment solution or the rinsing water drips off quickly, because the lower rod ends are free of masks and brackets.
  • the top At the end there is only one gripper with a small surface, so that overall only small amounts of liquid are carried away.
  • the method enables the rod to be positioned in the center of a Pipe electrode allows.
  • the removal of all surface areas of the rod to the opposite electrode wall is over the entire circumference same size. This is a requirement for a uniform electrochemical Treatment, for example coating. Hence the rods can no longer be mechanically reworked.
  • the gripper according to the invention By using the gripper according to the invention with a fixed and a movable leg and when treating rods with strong different diameters, the position of the rod axis changes Gripper axis. Through different positioning of the gripper when lowering this can be compensated for by the rod in the single cell.
  • two different ones are sufficient Countersink positions to include all occurring rod diameters to provide a sufficiently uniform coating.
  • the shielding masks are stationary in the individual cells, is only the material to be treated and the metallic tongs with the treatment liquid wetted to transfer from station to station. All other bathroom fittings, Except for the metallic pliers with the counter electrode, they are not electrically conductive They can be made from durable plastic.
  • Rods with varying diameters can form two sealants of cuffs lying on top of each other, each with an opening to insert the object through which it is passed, and have radial incisions running towards the openings, wherein the incisions of the two sealants are arranged offset from one another.
  • several superimposed sealants in the form of Cuffs are provided, the openings for inserting the object with different diameters.
  • the shielding in the shielded area can be at least one additional, electrically connected to the object and in the axial direction beyond the sealant in the electrochemically Treating area arranged metal body can be provided. By its use becomes the electrical field line distribution focused on the object reduced so that the threshold for electrochemical Treatment in this area is no longer exceeded.
  • the envelope enclosing the object also in the electrochemical treatment area should be extended.
  • Another preferred embodiment is perforated electrodes to use. This makes it possible to remove the treatment liquid contained in the immersion bath through the perforations in the electrode against the object to promote a targeted flow and thus an influence of the electrochemical treatment process.
  • the goods carrier shown in Figure 1 consists of a multi-part frame 1 on the frame pads 2 on the container for the treatment liquid is filed.
  • Pliers-shaped grippers 3 are attached to the frame.
  • the Grippers consist of a fixed leg 4 and a movable one Leg 5. The latter is rotatably mounted with an axis 6 in leg 4.
  • the jaws 8 and 9 on the Legs pressed together on the gripper.
  • the jaw 8 on the fixed Leg is arched inward with a cross section that is preferred is trapezoidal.
  • the jaw 9 on the movable leg has the illustrated domed, convex profile. This allows rods 10 grip with different shaft diameters. When they are gripped, they are in the prism-shaped jaw is precisely aligned in the longitudinal direction of the gripper. In the illustration in FIG. 1, the rods are arranged vertically.
  • the jaws 8 and 9 can also be switched be attached to the thighs.
  • the bars are gripped by exerting force on the movable leg 5 or let go.
  • a force for example, from a pressure cylinder Exercised in the direction of arrow 11, gripper 3 opens. All grippers on the goods carrier are opened with known methods and means of mechanical engineering or closed. These are therefore not shown.
  • a goods carrier can hold 32 bars in the loading station, for example. This process as well as the emptying process is also with changing dimensions the bars can be easily automated.
  • the dimensions of the to be machined Bars are at least the same size in every row in the product carrier.
  • the frame 1 and the frame supports 2 and all parts of the gripper are electrically conductive. About the frame supports the bath flow becomes the product carrier and thus the material to be treated, that is the rods 10, supplied. When using large currents, the support points clamped for safe power line.
  • the framework exists expediently made of copper with a titanium sheath for protection against corrosion.
  • the lower one can be immersed in the bath Area of the metallic gripper may be minimally metallized. That is why at least this area of the gripper is down to the jaws provided with an insulating layer. If necessary, the jaws become chemical or electrolytically demetallized in an appropriate bath.
  • the system transport device and the goods carrier By means of the system transport device and the goods carrier they become treating rods 10 brought into the individual cells 22 and there exactly in the X, Y and Z axes positioned.
  • the area to be treated electrochemically the rod is on the top and bottom of the masks 23, 26 and the cuffs 24, 27 limited in each individual cell.
  • the location of the boundary will specific for each item to be treated, for a row on the goods carrier or for set the entire product carrier.
  • the limitation is set automatically for each product carrier. If rods of different lengths are to be treated per row on the goods carrier, so the limits for each row are adjusted individually. The setpoints for the adjustments are made to the Control system of the immersion bath system transmitted.
  • the smooth Adjustment devices 20, 28 are the height of the upper and lower panel supports based on these setpoints.
  • the altitude actual values are the Control system reported back from the system. This facility enables a precise, partial treatment of rods with very different Dimensions in a bath container without having to convert it or the goods carrier to have to.
  • the polarity of the bath current supply lines is shown in FIGS. 2a and 2b for an electrochemical detailing. The one in brackets The polarity specified applies to the electrochemical etching process.
  • the treatment station is shown in plan view without goods carrier.
  • the only parts of the product carrier are the rods 10, the clamping jaws 8, 9 and the legs 4, 5 of the gripper.
  • the upper panel support 25 is not shown in order to take a look at the figure
  • Individual drives M1 and M2 shown for the height adjustments can also from one drive each for all support points of a panel support will be realized. Drive elements ensure parallel height adjustment like shafts and gears.
  • the current position of the panel holder is from position sensors not shown are reported back to the control system. This is thus able to position the aperture holder in any predetermined position targeted to start.
  • the correct position of the panel supports 17, 25 can be before or after Storage of the product carrier in the bath container 14 are approached.
  • the rod to be treated 10 can usually have several turned-on shoulders 30, some with threads, exhibit.
  • the jaws 8 and 9 grip the rod at the neck 33.
  • the Jaws 9, a half cylinder the rod is touched at one point and pressed into the prism-shaped jaw 8 for exact alignment.
  • Both Clamping jaws consist of a wear-resistant, corrosion-resistant one and electrically good conductive material. It is convenient to use the jaws attachable to the legs of the grippers.
  • the tubular Masks 23, 26, which are arranged in the electrode 30, can be in height be adjusted. They are arranged concentrically to the electrode.
  • the coverings for the bars are on the side facing the treatment room 34 above with an extension 35 and provided with an extension 36 below.
  • These extensions mask the end of the surfaces to be treated so that to the delimitation point 37, which are formed by the cuffs 24, 27, there is no increase or decrease in current density. Without these extensions occurs, for example, in electrolytic metallization and a current density thus increasing the layer thickness (so-called bone effect).
  • These extensions are not limited to a cylindrical pipe extension. Much more You can also use these extensions to adapt to the individual cell have other shapes. Funnel-shaped ones are also suitable, for example Mask closings in both directions, i.e. moved in or yourself opening funnels. Furthermore, the extensions can also have openings be provided.
  • the field-free space 38 is located outside the treatment room 34 above and the field-free space 39 below. In these rooms it takes place as intended no electrochemical treatment takes place.
  • the cuffs 24, 27 tightly enclose the rod 10. They preferably consist of an elastic material that is wear and corrosion resistant. Suitable are films made of plastic, such as FPM (Fluorine / rubber plastic).
  • the cuffs have a round opening which is not larger than the smallest rod diameter at the delimitation point 37. They are fastened in the tube so that the opening in the mask center lies. A sleeve can be used to compensate for tolerances can also be attached floating in the tubular masks. The cuff then also lies with non-aligned axes of rod 10 and Mask 23, 26 close to the rod.
  • the cuff is pinned in several layers built up. This allows the treatment of bars with large differences in diameter at the delimitation point 37 Service life of the sleeves in a system, even bars with very different Bar diameters are produced. Such is shown in FIG Cuff shown.
  • the individual layers are offset against each other arranged that the cuts 42 of one sleeve film from the other Foil are covered. The same applies to other locations.
  • Advantageous It is also the case if the layers have a graduated diameter have central opening 40. In this case, the limitation point 37 particularly precisely adjusted with minimal wear on the cuff become.
  • the layers are gripped by a cuff holder 41.
  • the Bracket is fixed or floating in the mask.
  • the thickness can be constant, as shown in FIG. 5, or decrease gradually.
  • This has the advantage that the cuff is in the penetration area of the rod is very flexible, although the cuff in the Area of the outer diameter is very stable. The intruding This provides little resistance to the rod. Still the seal to the field-free rooms 38, 39 very reliably. So that's enough for many Treatments form a cuff at each boundary point of the treating surface to ensure a secure seal.
  • the cuff consists of electrical non-conductive brushes.
  • the brushes are attached to the cuff holder and point radially to the cuff center. With dense bristles reliable masking and a long service life achieved.
  • the threshold value of Current density from which metal deposition takes place is not reached is because the additional metal surfaces of the jaws 8, 9 to limit the current density at the end of the rod, the threshold value in lower space 39 can be exceeded more easily.
  • an enlargement of the in this space 39 metal surfaces on the same electrical Potential as the rod are provided.
  • FIG. 5 there is a metallic one in the center of the room 39 Body 44 arranged. This is freely movable in the axial direction. He is attached to a holding element 45 made of non-conductive material, that is guided in the mask 23.
  • the holding element 45 can either as Float be designed so that it is up in the liquid is pressed, or it is by a between the holding element and the lower panel support 17 arranged spring 46 moved upwards.
  • the metallic body 44 lies on the lower one Cuff 24 on when there is no rod in the single cell 22. At the Sinking a rod into the single cell and thus into room 39 the rod is brought into electrical contact with the metallic body, so that it receives the same electrical potential as the rod.
  • the electrode 30 is preferably designed as an insoluble electrode.
  • the electrode can be designed as a perforated tube a good electrolyte exchange can take place in the treatment room 34.
  • An expanded metal grid, from which the electrode is made, is suitable, for example is formed.
  • a further electrolyte exchange takes place through the gap 43 (FIG. 3) instead of.
  • the gap 43 is omitted.
  • the electrodes telescopically adjustable together with the mask adjustment.
  • electrolyte in the treatment room 34 is generated solely via the electrode perforations exchanged.
  • the surface of the electrode must be chemical and be electrochemically resistant. Surface coatings Platinum or mixed oxides are so stable that the electrodes have a long service life be achieved.
  • the electrodes are connected to the electrode insert in an electrically conductive manner.
  • the bath current source is common to all electrodes via this insert connected.
  • an individual bath current source can be assigned to each electrode.
  • the electrodes on the electrode insert are electrical insulated and attached with an insulated cable to the respective power source connected.
  • the electrode can also be soluble.

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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)
  • Water Treatment By Electricity Or Magnetism (AREA)

Claims (19)

  1. Procédé pour le traitement électrochimique d'objets étendus en longueur, comprenant les étapes suivantes de procédé :
    a) saisie au moins d'un objet (10) à une extrémité au moyen d'une pince (3)
    b) transfert axial le plus concentrique possible de l'objet maintenu par la pince dans une cavité avec un axe longitudinal dans une électrode (30) disposée dans un bain d'immersion et présentant une paroi parallèle à l'axe,
    c) l'objet étant en même temps traversé par au moins un masque de blindage (23 ; 26) troué et déplaçable axialement de telle sorte qu'une zone devant être traitée par voie électrochimique de l'objet est face à la paroi et qu'une zone ne devant pas être traitée par voie électrochimique est protégée par l'électrode ;
    d) admission d'un courant de bain anodique ou cathodique vers l'objet par connexion électrique de l'objet avec un pôle d'une source de courant et de l'électrode avec l'autre pôle de la source de courant.
  2. Procédé selon la revendication 1 caractérisé en ce que l'électrode (10) avec la cavité est disposée en substance perpendiculairement dans le bain d'immersion (14).
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la zone devant être traitée par voie électrochimique sur l'objet (10) est ajustée par un déplacement axial relatif de l'objet et du masque de blindage (23 ; 26) l'un par rapport à l'autre.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la zone devant être traitée par voie électrochimique sur l'objet (10) est ajustée par la profondeur d'immersion de l'objet dans le bain d'immersion (14).
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le bain d'immersion (14) contient un liquide de traitement qui est transporté contre l'objet (10) à travers des trous réalisés dans l'électrode (30).
  6. Dispositif pour le traitement électrochimique d'objets étirés en longueur, comprenant
    a) un récipient (14) destiné à recevoir un liquide de traitement.
    a1) avec au moins une électrode (30) contenue dedans pour le traitement électrochimique d'un objet (10),
    a2) l'électrode présentant une cavité avec un axe longitudinal et une paroi parallèle à l'axe dans laquelle l'objet peut être introduit,
    b) au moins un masque de blindage (23 ; 26) déplaçable axialement à l'intérieur de la cavité, doté d'ouvertures (40) pour l'introduction de l'objet et conçu de telle sorte que ledit masque peut empêcher le traitement électrochimique de l'objet dans certaines zones et
    c) au moins une source de courant et des connexions électriques d'un pôle de connexion de la source de courant vers l'électrode et de l'autre pôle de connexion vers l'objet pouvant être introduit dans l'électrode.
  7. Dispositif selon la revendication 6, caractérisé en ce que le masque de blindage (23 ; 26) est conçu comme une enveloppe entourant en partie l'objet (10) dans le sens axial.
  8. Dispositif selon l'une quelconque des revendications 6 et 7, caractérisé en ce qu'il est prévu, sur le masque de blindage (23 ; 26), un moyen d'étanchéité (24 ; 27) qui repose contre la paroi de la cavité, pour déterminer la limite de la zone devant être traitée par voie électrochimique.
  9. Dispositif selon l'une quelconque des revendications 6 à 8, caractérisé en ce qu'il est prévu une cavité tubulaire.
  10. Dispositif selon l'une des revendications 8 et 9, caractérisé en ce que le moyen d'étanchéité (24 ; 27) présente une ouverture (40) pour l'introduction de l'objet (10).
  11. Dispositif selon l'une quelconque des revendications 8 à 10, caractérisé en ce qu'il est prévu un autre moyen d'étanchéité reposant sur le premier moyen d'étanchéité (24 ; 27), les deux moyens d'étanchéité (24 ; 27) présentant respectivement une ouverture (40) pour l'introduction de l'objet et des incisions (42) radiales allant vers les ouvertures, les incisions (42) des deux moyens d'étanchéité (24 ; 27) étant disposées en étant décalées l'une par rapport à l'autre.
  12. Dispositif selon l'une quelconque des revendications 6 à 9, caractérisé en ce qu'il est prévu plusieurs moyens d'étanchéité (24 ; 27) superposés qui présentent des ouvertures (40) de diamètres différents.
  13. Dispositif selon l'une quelconque des revendications 10 à 12, caractérisé en ce qu'il est prévu des moyens d'étanchéité (24 ; 27) dont l'épaisseur va en diminuant en direction de l'ouverture.
  14. Dispositif selon l'une quelconque des revendications 6 à 13, caractérisé en ce qu'il est prévu au moins un corps métallique (44) supplémentaire, connecté électriquement avec l'objet (10) et disposé dans le sens axial au-delà des moyens d'étanchéité (24 ; 27), dans la zone ne devant pas être traitée par voie électrochimique.
  15. Dispositif selon l'une quelconque des revendications 7 à 14, caractérisé en ce qu'il est prévu un prolongement (35 ; 36) de l'enveloppe (23 ; 26) entourant l'objet (10) dans la zone (34) devant être traitée par voie électrochimique.
  16. Dispositif selon l'une quelconque des revendications 6 à 15, caractérisé en ce qu'il est prévu un support (13 ; 17) pour le masque de blindage (23 ; 26) et un dispositif pour l'ajustement axial en hauteur (20 ; 28) du masque de blindage.
  17. Dispositif selon l'une quelconque des revendications 6 à 16, caractérisé en ce qu'il est prévu une pince (3) formée d'une branche (4) fixe et d'une branche (5) mobile ainsi que des mâchoires de serrage (8 ; 9) fixées sur les branches.
  18. Dispositif selon la revendication 17, caractérisé en ce qu'il est prévu un moyen (5) exerçant une force de fermeture sur les mâchoires de serrage (8; 9).
  19. Dispositif selon l'une quelconque des revendications 6 à 18, caractérisé en ce qu'il est prévu des électrodes (30) dotées de trous.
EP97940064A 1996-08-09 1997-08-07 Procede et installation de traitement electrochimique d'objets longilignes Expired - Lifetime EP0874921B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19632132 1996-08-09
DE19632132A DE19632132C1 (de) 1996-08-09 1996-08-09 Verfahren zur elektrochemischen Behandlung von stabförmigem Behandlungsgut und Vorrichtung zur Durchführung des Verfahrens
DE19722983A DE19722983C2 (de) 1996-08-09 1997-06-02 Verfahren zur elektrochemischen Behandlung von stabförmigem Behandlungsgut und Vorrichtung zur Durchführung des Verfahrens
DE19722983 1997-06-02
PCT/EP1997/004341 WO1998006884A1 (fr) 1996-08-09 1997-08-07 Procede et installation de traitement electrochimique d'objets longilignes

Publications (2)

Publication Number Publication Date
EP0874921A1 EP0874921A1 (fr) 1998-11-04
EP0874921B1 true EP0874921B1 (fr) 2000-01-12

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EP97940064A Expired - Lifetime EP0874921B1 (fr) 1996-08-09 1997-08-07 Procede et installation de traitement electrochimique d'objets longilignes

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EP (1) EP0874921B1 (fr)
JP (1) JP4139439B2 (fr)
ES (1) ES2142690T3 (fr)
WO (1) WO1998006884A1 (fr)

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DE19822196C2 (de) * 1998-05-16 2000-05-11 Lemfoerder Metallwaren Ag Verfahren zur selektiven bereichsweisen Beschichtung metallischer Bauteile und Vorrichtung zur Durchführung des Verfahrens
JP4910347B2 (ja) * 2005-09-27 2012-04-04 トヨタ自動車株式会社 スペーサを兼ねた集電電極を備えた燃料電池セルモジュール
US8394253B2 (en) 2010-11-16 2013-03-12 Strategic Resource Optimization, Inc. Electrolytic system and method for generating biocides having an electron deficient carrier fluid and chlorine dioxide
WO2015055537A1 (fr) * 2013-10-17 2015-04-23 Damm Oberflächentechnik Gmbh & Co. Kg Procédé et dispositif permettant de revêtir des étriers d'appuie-tête ou des tiges d'appuie-tête
CN107002268A (zh) * 2014-12-19 2017-08-01 德万波液压有限公司 用于圆形材料的光学铭刻和/或标记的方法
JP6282773B1 (ja) * 2017-06-30 2018-02-21 株式会社ショーワ マスキング治具、電気メッキ装置
CN108637604A (zh) * 2018-05-14 2018-10-12 山推工程机械股份有限公司 一种油缸轴的制备方法
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FR2578859B1 (fr) * 1985-03-12 1989-09-08 Commissariat Energie Atomique Appareillage et installation de realisation d'un depot metallique electrolytique d'epaisseur constante.

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WO1998006884A1 (fr) 1998-02-19
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JP4139439B2 (ja) 2008-08-27
JP2000516303A (ja) 2000-12-05

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