EP1889951B1 - Apparatus and method for anodising workpieces - Google Patents

Apparatus and method for anodising workpieces Download PDF

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Publication number
EP1889951B1
EP1889951B1 EP06090143A EP06090143A EP1889951B1 EP 1889951 B1 EP1889951 B1 EP 1889951B1 EP 06090143 A EP06090143 A EP 06090143A EP 06090143 A EP06090143 A EP 06090143A EP 1889951 B1 EP1889951 B1 EP 1889951B1
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EP
European Patent Office
Prior art keywords
treated
elevations
clamping jaw
titanium
intermediate part
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EP06090143A
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German (de)
French (fr)
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EP1889951A1 (en
Inventor
Wolf-Thilo Fortak
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Wolf-Thilo Fortak Industrieberatung und Techn Sevice fur Die Galvanotechnik
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Wolf-Thilo Fortak Industrieberatung und Techn Sevice fur Die Galvanotechnik
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Priority to AT06090143T priority Critical patent/ATE486980T1/en
Priority to EP06090143A priority patent/EP1889951B1/en
Priority to DE502006008231T priority patent/DE502006008231D1/en
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    • 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
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • 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
    • 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
    • C25D17/005—Contacting devices
    • 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

Definitions

  • the invention relates to an apparatus and a method for the electrolytic treatment of metallic workpieces, including sheet-like, large and thin material to be treated of aluminum or aluminum alloys, by means of a method in which the workpieces are subjected to high electrical current.
  • the US Pat. No. 4,085,997 and the GB 1 468 118 A disclose an anodization device that uses titanium clamping jaws that hold the material to be treated between two points of contact through which current flows.
  • Spring-loaded clamping elements made of titanium, which hold the item to be treated with their flat contact surfaces are made of DE 102 45 182 A1 known.
  • the US Pat. No. 4,615,785 describes an apparatus for anodization, the clamping elements contain titanium, which are provided with a tooth-like handle for attachment to a bath rod (bath bar).
  • the disadvantage here is once the poor electrical conductivity (15 times lower than aluminum), so that previously titanium anodes are used only for smaller aluminum parts.
  • Another disadvantage is that build up uncontrolled contact bridges that lead to burns in Aluminium asidesgut. The contact current is subject to fluctuations, with the result that the layer thickness of the layer produced by the anodization can not be exactly defined.
  • the DE 34 47 733 discloses a contactless anodic oxidation of aluminum.
  • the object of the invention is to realize a device for electrochemical treatment of sheet-like, large and thin material to be treated, in which a regular cleaning or stripping of the support frame or its parts, such as terminals, can be dispensed with. Furthermore, a minimum possible surface damage in the field of attachment and contacting of the material to be treated should be achieved.
  • a device for the electrolytic treatment of particular large, thin and sheet-like material is provided with clamping or support arms arranged jaws for the treated, wherein at least one jaw made of titanium or a titanium alloy and this Titanklemmbacke directed to the treated has a surface with elevations , so that the current flow takes place via contact points or contact edges of the elevations.
  • the elevations are preferably formed pyramid-like with a tip.
  • a substantially punctiform contact can also be achieved by hemispherical-shaped elevations or by a corrugation.
  • An edge-shaped contacting is achieved with elevations with a prismatic shape with contact edges facing the item to be treated.
  • the surveys may be a thread profile.
  • the device described hitherto is particularly suitable for sheet-like, large and thin items made of aluminum or aluminum alloys, since usually the clamping points are removed after separation of the anodization process by separation, it has proven useful in structures where no separation of the clamping points is provided to arrange an intermediate part made of aluminum or an aluminum alloy between the jaw or jaws and the item to be treated. This is preferably releasably connected to the respective jaw, so that it for Pickling is removable or handled as a "disposable item".
  • the intermediate part has a smooth surface on the side facing the clamping jaw and is provided with elevations on the side facing the material to be treated, preferably with small cones, cones, truncated cones and / or lamellae.
  • the non-anodized surface areas on the material to be treated are then formed very small area and not or only slightly visible.
  • another embodiment provides a flushing possibility in the form of on the surface of the clamping jaw from outer edge to outer edge continuously arranged grooves.
  • the process stream for electrolytic treatment is conducted in a punctiform manner or over an edge into the material to be treated. This is achieved by the corresponding structuring of the surface of at least one titanium clamping jaw.
  • currents of 4 and more amps / contact point can be transferred during anodizing.
  • Clamping jaws with a cross-sectional area of 23 x 23 mm can be used to transfer currents of 300 amperes.
  • Fig. 1 is the basic structure of an anodizing system shown.
  • the treatment tank 11 of the anodizing plant may have a width of about 11 m and more and a height of 2.5 m and more, for example, sheet-like, large and thin material to be treated 6, such as aluminum foil, in the dimensions of 10 x 1.5 m to treat.
  • the item to be treated 6 is attached to the clamping jaws 1, 2 between the two right and left arranged on a goods carrier 12 support or clamping arms 13.
  • the product carrier 12 is arranged to be movable over the treatment trough 11. The supply of the anode current via the goods carrier 12, the support or clamping arms 13 in the jaws 1, 2 and from these into the material to be treated 6, for. an aluminum foil.
  • the layer thickness moves in the nanometer range, so that in the described structuring of the surface 3 and at contact pressures between the jaws 1, 2 of 1.5 kp / mm 2 (118 - 147 kPa) and more overcome this oxide layer and the current flow is ensured controlled ,
  • a jaw 2 is shown in detail. While the surface of the clamping jaw 1 is planar, the surface 3 of the illustrated jaw 2 has a structured shape by elevations 4. This can also be the case with both jaws 1, 2. In the figure, the elevations 4 are only partially drawn. Provided is preferably a full-surface trimming the surface 3 with elevations. 4
  • the distance between adjacent elevations should preferably be between 0.1 - 4 mm and / or the elevations have the height of 0.3 - 4 mm.
  • surveys with a pyramid-like tip have proven.
  • Figure 3 shows an intermediate part 7 preferably used in space-shaped treated material 6 between the jaw 2, the surface of which has elevations 4 and the treated 6.
  • the intermediate part 7 is made of aluminum or an aluminum alloy and is detachably connected to the jaw 2.
  • the intermediate part 7 has on the side facing the jaw 2 a smooth surface and thus represents an analogue contact transition as it has been described above in a flat material to be treated 6.
  • the anodizing stream is selectively transferred from the titanium clamping jaw 2 into the aluminum intermediate part 7.
  • the intermediate part 7 on the treated material 6 side facing also with elevations 9, preferably one with small pins, Cones, truncated cones or lamellar surface 8 on.
  • the anodizing stream is directed selectively or on a small area from the intermediate part 7 into the material to be treated 6.
  • the journal cross section is 1.4 x 1.4 mm in the illustrated intermediate part 7 with the cross section 23 x 23 mm.
  • the intermediate part 7 is coated during the anodization with an oxide layer, so that it requires a pickling in a known manner or the intermediate part 7 is exchanged and disposed of the oxidized.
  • the intermediate part 7 and the jaw 2 are releasably connected to each other.
  • the clamping jaw 2 has at least one angle bracket 10, which comprises the intermediate part 7 on one side for producing a detachable connection, wherein the free leg of the bracket 9 engages between the elevations 9 of the surface 8 of the intermediate part 7, without overtoping them in the direction of material to be treated 6.
  • the elevations 9 are shown in the figure only partially.
  • the material to be treated 6 can be anodized in such a way that the nips, over which the anode current flows, are formed over a small area on the item to be treated 6 and thus are not or only slightly visible on the item to be treated 6 after the anodization. Furthermore, with the reusable nature of the power transmission to different frame areas by the safe Stromübertragles between titanium contacts with each other opens up the possibility to realize even for large-scale ceremonies ceremoniessgut Universal rack systems made of titanium and titanium alloys.

Abstract

Device for the wet chemical or electrolytic treatment of a large, thin and flat material (6) comprises clamping jaws (1, 2) arranged on tensioning or support arms (13). The jaws are made from titanium or titanium alloy and have a surface with protrusions so that the current flow is produced via contact points or contact edges of the protrusions. An independent claim is also included for a method for the wet chemical or electrolytic treatment of a large, thin and flat material using the above device.

Description

Die Erfindung beschreibt eine Vorrichtung und ein Verfahren zur elektrolytischen Behandlung von metallischen Werkstücken, auch von flächenförmigem, großem und dünnem Behandlungsgut aus Aluminium oder Aluminiumlegierungen, mittels eines Verfahrens, bei dem die Werkstücke mit hohem elektrischen Strom beaufschlagt werden.The invention relates to an apparatus and a method for the electrolytic treatment of metallic workpieces, including sheet-like, large and thin material to be treated of aluminum or aluminum alloys, by means of a method in which the workpieces are subjected to high electrical current.

Derartige Verfahren und Vorrichtungen sind bekannt. Im einfachsten Fall werden die zu behandelnden Teile auf eine Aluminiumschiene (Gestell) geklemmt, die mit Strom versorgbar ist und in ein Anodisierungsbad abgesenkt ( DE 94 11 523 U1 ). Das hat den Nachteil, dass sich auf dem Gestell beim Anodisieren ebenfalls eine Oxidschicht ausbildet, die nicht mehr leitfähig ist. Deshalb muss das Gestell regelmäßig abgebeizt werdenSuch methods and devices are known. In the simplest case, the parts to be treated are clamped on an aluminum rail (frame), which can be supplied with power and lowered into an anodization bath ( DE 94 11 523 U1 ). This has the disadvantage that also forms an oxide layer on the frame during anodization, which is no longer conductive. Therefore, the frame must be pickled regularly

Das ist nicht nur technologisch ungünstig, sondern zieht auch noch umwelttechnische Probleme bezüglich der Entsorgung der zum Abbeizen eingesetzten Chemikalien nach sich.This is not only technologically unfavorable, but also entails environmental problems relating to the disposal of chemicals used for pickling.

Als Alternative zu einem Aluminiumgestell hat sich ein solches aus Titan oder einer Titanlegierung angeboten, da dieses Material hochgradig chemisch beständig ist. Ebenso sind Klemmelemente aus Titan oder Titanlegierungen bekannt.As an alternative to an aluminum frame, one made of titanium or a titanium alloy has been offered, since this material is highly chemically resistant. Likewise clamping elements made of titanium or titanium alloys are known.

Die US 4 085 997 A und die GB 1 468 118 A offenbaren eine Vorrichtung zur Anodisierung, die Klemmbacken aus Titan verwendet, wobei diese das Behandlungsgut zwischen zwei Kontaktpunkten halten, durch die der Stromfluss erfolgt. Federnde Klemmelemente aus Titan, die das Behandlungsgut mit ihren flachen Kontaktflächen halten, sind aus der DE 102 45 182 A1 bekannt.The US Pat. No. 4,085,997 and the GB 1 468 118 A disclose an anodization device that uses titanium clamping jaws that hold the material to be treated between two points of contact through which current flows. Spring-loaded clamping elements made of titanium, which hold the item to be treated with their flat contact surfaces are made of DE 102 45 182 A1 known.

Die US 4 615 785 A beschreibt eine Vorrichtung zur Anodisierung, deren Klemmelemente Titan enthalten, wobei diese mit einem zahnartigen Griff zur Befestigung an einer Leitungsstange (bath bar) versehen sind.The US Pat. No. 4,615,785 describes an apparatus for anodization, the clamping elements contain titanium, which are provided with a tooth-like handle for attachment to a bath rod (bath bar).

Von Nachteil ist hier einmal die schlechte elektrische Leitfähigkeit (15-fach geringer als Aluminium), so dass bisher Titananoden nur bei kleineren Aluminiumteilen genutzt werden. Ein weiterer Nachteil besteht darin, dass sich unkontrolliert Kontaktbrücken aufbauen, die zu Einbrennungen im Aluminiumbehandlungsgut führen. Der Kontaktstrom unterliegt so Schwankungen mit der Folge, dass die Schichtdicke der durch das Anodisieren erzeugten Schicht nicht exakt zu definieren ist.The disadvantage here is once the poor electrical conductivity (15 times lower than aluminum), so that previously titanium anodes are used only for smaller aluminum parts. Another disadvantage is that build up uncontrolled contact bridges that lead to burns in Aluminiumbehandlungsgut. The contact current is subject to fluctuations, with the result that the layer thickness of the layer produced by the anodization can not be exactly defined.

Auf weitere Einzelheiten betreffend das Behandlungsgut wird in nachstehend genannten Veröffentlichungen eingegangen.Further details concerning the item to be treated are given in the following publications.

So beschreibt die DE 2 340 963 A1 ein Verfahren und eine Vorrichtung zum Oxidieren einer Folie aus Aluminium oder einer seiner Legierungen.That's how it describes DE 2 340 963 A1 a method and apparatus for oxidizing a foil of aluminum or one of its alloys.

Mit der DE 2 525 245 wird eine Vorrichtung zur kontinuierlichen elektrolytischen Behandlung eines langgestreckten Gebildes aus Aluminium oder einer Aluminiumlegierung beschrieben.With the DE 2 525 245 An apparatus for the continuous electrolytic treatment of an elongated structure made of aluminum or an aluminum alloy is described.

Die DE 34 47 733 offenbart eine kontaktlose anodische Oxidation von Aluminium.The DE 34 47 733 discloses a contactless anodic oxidation of aluminum.

Bei der Vorrichtung gemäß DE 101 45 554 C1 kommt sehr dünnes und flaches Behandlungsgut zur Anwendung, das an einem Stapelgehänge zum gleichzeitigen Transport einer Vielzahl von Behandlungsgut in elektrochemische Behandlungsanlagen aufgehängt und festgeklemmt wird.In the device according to DE 101 45 554 C1 is used very thin and flat material to be treated, which is suspended and clamped on a stack hanger for the simultaneous transport of a variety of items to be treated in electrochemical treatment plants.

Aufgabe der Erfindung ist es, eine Vorrichtung zur elektrochemischen Behandlung auch von flächenförmigem, großem und dünnem Behandlungsgut zu realisieren, bei dem auf eine regelmäßige Reinigung oder Abbeizung des Traggestells oder von dessen Teilen, wie Klemmen, verzichtet werden kann. Ferner soll eine geringst mögliche Oberflächenbeschädigung im Bereich der Befestigung und Kontaktierung des Behandlungsgutes erreicht werden.The object of the invention is to realize a device for electrochemical treatment of sheet-like, large and thin material to be treated, in which a regular cleaning or stripping of the support frame or its parts, such as terminals, can be dispensed with. Furthermore, a minimum possible surface damage in the field of attachment and contacting of the material to be treated should be achieved.

Gelöst wird diese Aufgabe mit den Merkmalen des Anspruches 1, vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche. Eine Anlage beschreibt Anspruch 15. Verfahrenstechnische Aspekte enthalten die Ansprüche 16 bis 19.This object is achieved with the features of claim 1, advantageous embodiments are the subject of the dependent claims. An appendix describes claim 15. Process-related aspects contain claims 16 to 19.

Erfindungsgemäß ist eine Vorrichtung zur elektrolytischen Behandlung von insbesondere großem, dünnem und flächenförmigem Behandlungsgut mit an Spann- oder Tragarmen angeordneten Klemmbacken für das Behandlungsgut vorgesehen, wobei mindestens eine Klemmbacke aus Titan oder einer Titanlegierung besteht und diese Titanklemmbacke gerichtet auf das Behandlungsgut eine Oberfläche mit Erhebungen aufweist, so dass der Stromfluss über Kontaktpunkte oder Kontaktkanten der Erhebungen erfolgt.According to the invention a device for the electrolytic treatment of particular large, thin and sheet-like material is provided with clamping or support arms arranged jaws for the treated, wherein at least one jaw made of titanium or a titanium alloy and this Titanklemmbacke directed to the treated has a surface with elevations , so that the current flow takes place via contact points or contact edges of the elevations.

Die Erhebungen sind bevorzugt pyramidenartig mit einer Spitze ausgebildet. Eine im wesentlichen punktförmige Kontaktierung ist auch durch halbkugelartig ausgebildete Erhebungen erreichbar oder durch eine Riffelung.
Eine kantenförmige Kontaktierung wird mit Erhebungen mit einer prismatische Form mit zum Behandlungsgut weisenden Kontaktkanten erreicht. Ebenso können die Erhebungen ein Gewindeprofil sein.The elevations are preferably formed pyramid-like with a tip. A substantially punctiform contact can also be achieved by hemispherical-shaped elevations or by a corrugation.
An edge-shaped contacting is achieved with elevations with a prismatic shape with contact edges facing the item to be treated. Likewise, the surveys may be a thread profile.

Diese Beispiele stellen eine auch fertigungstechnisch günstige Zusammenstellung dar, ohne die punktförmige oder kantenförmige Kontaktierung oder eine Kombination daraus darauf zu beschränken.These examples represent a production engineering favorable combination, without limiting the punctiform or edge-shaped contact or a combination thereof.

Während sich die bisher beschriebene Vorrichtung insbesondere eignet für flächenförmiges, großes und dünnes Behandlungsgut aus Aluminium oder Aluminiumlegierungen, da hier gewöhnlich die Klemmstellen nach dem Durchlauf des Anodisierverfahrens durch Abtrennen entfernt werden, hat es sich bei Gebilden, wo kein Abtrennen der Klemmstellen vorgesehen ist, bewährt, zwischen der oder den Klemmbacken und dem Behandlungsgut ein Zwischenteil aus Aluminium oder einer Aluminiumlegierung anzuordnen. Dies wird bevorzugt mit der jeweiligen Klemmbacke lösbar verbunden, so dass es zum Abbeizen entfernbar ist oder als "Wegwerfartikel" gehandhabt wird.While the device described hitherto is particularly suitable for sheet-like, large and thin items made of aluminum or aluminum alloys, since usually the clamping points are removed after separation of the anodization process by separation, it has proven useful in structures where no separation of the clamping points is provided to arrange an intermediate part made of aluminum or an aluminum alloy between the jaw or jaws and the item to be treated. This is preferably releasably connected to the respective jaw, so that it for Pickling is removable or handled as a "disposable item".

In einer bevorzugten Form weist das Zwischenteil auf der der Klemmbacke zugewandten Seite eine glatte Oberfläche auf und ist auf der dem Behandlungsgut zugewandten Seite mit Erhebungen versehen, vorzugsweise mit kleinen Zapfen, Kegel, Kegelstümpfen und/oder Lamellen. Die nichtanodisierten Oberflächenstellen am Behandlungsgut sind dann sehr kleinflächig ausgebildet und nicht oder nur wenig sichtbar.In a preferred form, the intermediate part has a smooth surface on the side facing the clamping jaw and is provided with elevations on the side facing the material to be treated, preferably with small cones, cones, truncated cones and / or lamellae. The non-anodized surface areas on the material to be treated are then formed very small area and not or only slightly visible.

Um zu verhindern, dass beim Einsatz der Klemmbacken mit den Erhebungen auf der Oberfläche Anodisierbadreste an den Klemmbacken haften bleiben, sieht eine weitere Ausgestaltung eine Spülmöglichkeit in Form von auf der Oberfläche der Klemmbacke von Außenkante zu Außenkante durchgehend angeordneten Nuten vor.In order to prevent that when using the jaws with the elevations on the surface Anodisierbadreste adhere to the jaws, another embodiment provides a flushing possibility in the form of on the surface of the clamping jaw from outer edge to outer edge continuously arranged grooves.

In weiterer Ausgestaltung der Erfindung ist nicht nur vorgesehen die Klemmstellen mit dem Behandlungsgut wie beschrieben auszubilden, sondern die Stromübergänge am Gestell generell da, wo ein Übergang zwischen Aluminium und Titan oder Titan und Titan bzw. deren Legierungen vorgesehen ist, auch an Stellen, die keinen unmittelbaren Kontakt mit dem Anodisierbad haben.In a further embodiment of the invention is not only intended to form the terminal points with the treated as described, but the current transitions on the frame generally there, where a transition between aluminum and titanium or titanium and titanium or their alloys is provided, even in places that no have direct contact with the anodizing bath.

Verfahrensseitig ist vorgesehen, dass der Prozessstrom zur elektrolytischen Behandlung punktförmig oder über eine Kante in das Behandlungsgut geleitet wird. Dies wird durch die entsprechende Strukturierung der Oberfläche mindestens einer Titanklemmbacke erreicht. Dabei können beim Anodisieren Ströme von 4 und mehr Ampere/Kontaktpunkt übertragen werden. Über Klemmbacken mit einer Querschnittsfläche von 23 x 23 mm lassen sich so Ströme von 300 Ampere übertragen.In terms of the process, it is provided that the process stream for electrolytic treatment is conducted in a punctiform manner or over an edge into the material to be treated. This is achieved by the corresponding structuring of the surface of at least one titanium clamping jaw. In this case, currents of 4 and more amps / contact point can be transferred during anodizing. Clamping jaws with a cross-sectional area of 23 x 23 mm can be used to transfer currents of 300 amperes.

Geringe Oxidationserscheinungen der Titanklemmbacke oder der - backen werden überwunden, wenn der Druck der Kontaktpunkte auf das Behandlungsgut insbesondere mehr als 1,5 kp/mm2 (1,47 x 105 Pa) beträgt.Low oxidation phenomena of the titanium jaw or the jaw are overcome if the pressure of the contact points on the material to be treated is in particular more than 1.5 kp / mm 2 (1.47 × 10 5 Pa).

Ausführungsbeispiele sind in den Zeichnungen dargestellt.Embodiments are shown in the drawings.

Es zeigen:

Fig. 1:
eine Anodisierungsanlage,
Fig. 2:
eine Klemmbacke,
Fig. 3:
ein Zwischenteil und
Fig. 4:
eine Verbindung Klemmbacke Zwischenteil.
Show it:
Fig. 1:
an anodizing plant,
Fig. 2:
a jaw,
3:
an intermediate part and
4:
a connection jaw intermediate part.

In Fig. 1 ist der prinzipielle Aufbau einer Anodisierungsanlage dargestellt. Die Behandlungswanne 11 der Anodisierungsanlage kann innen eine Breite von rund 11 m und mehr und eine Höhe von 2,5 m und mehr aufweisen, um z.B. flächenförmiges, großes und dünnes Behandlungsgut 6, etwa Aluminiumfolie, in den Abmaßen von 10 x 1,5 m zu behandeln.In Fig. 1 is the basic structure of an anodizing system shown. The treatment tank 11 of the anodizing plant may have a width of about 11 m and more and a height of 2.5 m and more, for example, sheet-like, large and thin material to be treated 6, such as aluminum foil, in the dimensions of 10 x 1.5 m to treat.

Das Behandlungsgut 6 wird zwischen den beiden rechts und links an einem Warenträger 12 angeordneten Trag- oder Spannarmen 13 mit den Klemmbacken 1, 2 befestigt. Der Warenträger 12 ist über der Behandlungswanne 11 verfahrbar angeordnet. Die Zuleitung des Anodenstroms erfolgt über den Warenträger 12, die Trag- oder Spannarme 13 in die Klemmbacken 1, 2 und von diesen in das Behandlungsgut 6 z.B. eine Aluminiumfolie.The item to be treated 6 is attached to the clamping jaws 1, 2 between the two right and left arranged on a goods carrier 12 support or clamping arms 13. The product carrier 12 is arranged to be movable over the treatment trough 11. The supply of the anode current via the goods carrier 12, the support or clamping arms 13 in the jaws 1, 2 and from these into the material to be treated 6, for. an aluminum foil.

Die Stromübertragung von den Klemmbacken 1, 2 oder der Klemmbacke 2 erfolgt über die Erhebungen 4 der Oberfläche 3 punktförmig in die Aluminiumfolie, wobei bevorzugt Ströme in der Größenordnung von 4 und mehr Ampere/Kontaktpunkt übertragen werden.
Neben den Klemmbacken 1, 2 sind bei dem dargestellten Gestell zum Einbringen von Behandlungsgut 6 in die Behandlungswanne 11 die stromführenden Übergänge von Aluminium-Warenträger 12 zu den aus Titan oder einer Titanlegierung bestehenden Trag- oder Spannarmen 13 und von diesen zu den Klemmbacken 1, 2 für das Behandlungsgut 6 unter Verwendung von Kontaktgebern 2' aus Titan mit einer Oberfläche 3 mit Erhebungen 4 ausgebildet.
Bei dem Titan oder den Titanlegierungen der Klemmbacken 1, 2 bildet sich auch auf deren Oberfläche 3 eine Oxidschicht während des Anodisierungsprozesses aus. Die Schichtdicke bewegt sich im Nanometerbereich, so dass bei der beschriebenen Strukturierung der Oberfläche 3 und bei Kontaktdrücken zwischen den Klemmbacken 1, 2 von 1,5 kp/mm2 (118 - 147 kPa) und mehr diese Oxidschicht überwunden und der Stromfluss kontrolliert gewährleistet wird.The power transmission from the jaws 1, 2 or the jaw 2 via the elevations 4 of the surface 3 punctiform in the aluminum foil, wherein preferably currents in the order of 4 and more amps / contact point are transmitted.
In addition to the jaws 1, 2 are in the frame shown for the introduction of items to be treated 6 in the treatment tub 11th the current-carrying transitions of aluminum product carrier 12 to the existing titanium or a titanium alloy support or clamping arms 13 and of these to the jaws 1, 2 for the treated material 6 using contactors 2 'made of titanium with a surface 3 with elevations 4 ,
In the case of the titanium or the titanium alloys of the clamping jaws 1, 2, an oxide layer is also formed on its surface 3 during the anodization process. The layer thickness moves in the nanometer range, so that in the described structuring of the surface 3 and at contact pressures between the jaws 1, 2 of 1.5 kp / mm 2 (118 - 147 kPa) and more overcome this oxide layer and the current flow is ensured controlled ,

In Fig. 2 ist eine Klemmbacke 2 im Detail dargestellt. Während die Oberfläche der Klemmbacke 1 plan ausgebildet ist, weist die Oberfläche 3 der dargestellten Klemmbacke 2 eine strukturierte Form durch Erhebungen 4 auf. Das kann auch bei beiden Klemmbacken 1, 2 der Fall sein. In der Fig. sind die Erhebungen 4 nur teilweise eingezeichnet. Vorgesehen ist vorzugsweise ein vollflächiger Besatz der Oberfläche 3 mit Erhebungen 4.In Fig. 2 a jaw 2 is shown in detail. While the surface of the clamping jaw 1 is planar, the surface 3 of the illustrated jaw 2 has a structured shape by elevations 4. This can also be the case with both jaws 1, 2. In the figure, the elevations 4 are only partially drawn. Provided is preferably a full-surface trimming the surface 3 with elevations. 4

Der Abstand zwischen benachbarten Erhebungen sollte bevorzugt zwischen 0,1 - 4 mm betragen und/oder die Erhebungen die Höhe von 0,3 - 4 mm aufweisen. Dabei haben sich Erhebungen mit einer pyramidenartigen Spitze bewährt.The distance between adjacent elevations should preferably be between 0.1 - 4 mm and / or the elevations have the height of 0.3 - 4 mm. Here, surveys with a pyramid-like tip have proven.

Weiter wird gezeigt, dass in der Oberfläche 3 der Klemmbacke 2 von Außenkante zu Außenkante durchgehende Nute 5 angeordnet sind, die in Abtropfrichtung verlaufen. Sie dienen in erster Linie zur Spülung der Klemmbacke 2 nach dem Anodisieren von Chemikalien.It is further shown that in the surface 3 of the jaw 2 from the outer edge to the outer edge continuous grooves 5 are arranged, which extend in the dripping direction. They serve primarily to rinse the jaw 2 after the anodizing of chemicals.

Fig.3 zeigt ein Zwischenteil 7 vorzugsweise verwendet bei raumförmig ausgebildeten Behandlungsgut 6 zwischen der Klemmbacke 2, deren Oberfläche Erhebungen 4 aufweist und dem Behandlungsgut 6. Das Zwischenteil 7 besteht aus Aluminium oder einer Aluminiumlegierung und ist mit der Klemmbacke 2 lösbar verbunden. Das Zwischenteil 7 besitzt auf der der Klemmbacke 2 zugewandten Seite eine glatte Oberfläche und stellt somit einen analogen Kontaktübergang dar wie er oben bei einem flächigen Behandlungsgut 6 beschrieben worden ist. Der Anodisierstrom wird punktuell von der Titanklemmbacke 2 in das Aluminiumzwischenteil 7 übertragen. Figure 3 shows an intermediate part 7 preferably used in space-shaped treated material 6 between the jaw 2, the surface of which has elevations 4 and the treated 6. The intermediate part 7 is made of aluminum or an aluminum alloy and is detachably connected to the jaw 2. The intermediate part 7 has on the side facing the jaw 2 a smooth surface and thus represents an analogue contact transition as it has been described above in a flat material to be treated 6. The anodizing stream is selectively transferred from the titanium clamping jaw 2 into the aluminum intermediate part 7.

Im Hinblick darauf, dass die Klemmstelle auf dem vorzugsweise räumlichen Behandlungsgut nicht entfernt werden soll oder kann und die Klemmstelle möglichst nicht sichtbar sein soll, weist das Zwischenteil 7 auf der dem Behandlungsgut 6 zugewandten Seite eine ebenfalls mit Erhebungen 9, vorzugsweise eine mit kleinen Zapfen, Kegeln, Kegelstümpfen oder Lamellen versehene Oberfläche 8 auf. Der Anodisierstrom wird so punktuell oder kleinflächig vom Zwischenteil 7 in das Behandlungsgut 6 geleitet. Der Zapfenquerschnitt beträgt 1,4 x 1,4 mm bei dem dargestellten Zwischenteil 7 mit dem Querschnitt 23 x 23 mm.In view of the fact that the nip on the preferably spatial material to be treated should not be removed and the nip should not be as visible as possible, the intermediate part 7 on the treated material 6 side facing also with elevations 9, preferably one with small pins, Cones, truncated cones or lamellar surface 8 on. The anodizing stream is directed selectively or on a small area from the intermediate part 7 into the material to be treated 6. The journal cross section is 1.4 x 1.4 mm in the illustrated intermediate part 7 with the cross section 23 x 23 mm.

Das Zwischenteil 7 wird beim Anodisieren mit einer Oxidschicht überzogen, so dass es in bekannter Weise eines Abbeizens bedarf oder das Zwischenteil 7 wird ausgetauscht und das oxidierte entsorgt.The intermediate part 7 is coated during the anodization with an oxide layer, so that it requires a pickling in a known manner or the intermediate part 7 is exchanged and disposed of the oxidized.

Durch die Verwendung eines Aluminiumzwischenteils 7 mit einer Aluminiumlegierung mit erhöhtem Kupfer- und Siliziumanteil bildet sich keine geschlossene Anodisierungsschicht, so dass mehrere Durchläufe ohne Austausch bzw. Beizen des Zwischenteils 7 möglich sind.By using an intermediate aluminum part 7 with an aluminum alloy with increased copper and silicon content, no closed anodization layer is formed, so that several passes are possible without exchange or pickling of the intermediate part 7.

Um den Austausch realisierbar zu machen, sind das Zwischenteil 7 und die Klemmbacke 2 lösbar miteinander verbunden. Eine solche Ausführung zeigt Fig. 4 . Die Klemmbacke 2 weist mindestens einen Winkelbügel 10 auf, der zur Herstellung einer lösbaren Verbindung das Zwischenteil 7 einseitig umfasst, wobei der freie Schenkel des Bügels 9 zwischen die Erhebungen 9 der Oberfläche 8 des Zwischenteils 7 greift, ohne diese in Richtung Behandlungsgut 6 zu überragen. Die Erhebungen 9 sind in der Fig. nur teilweise eingezeichnet.In order to make the exchange feasible, the intermediate part 7 and the jaw 2 are releasably connected to each other. Such an embodiment shows Fig. 4 , The clamping jaw 2 has at least one angle bracket 10, which comprises the intermediate part 7 on one side for producing a detachable connection, wherein the free leg of the bracket 9 engages between the elevations 9 of the surface 8 of the intermediate part 7, without overtoping them in the direction of material to be treated 6. The elevations 9 are shown in the figure only partially.

Mit der vorgeschlagenen Klemmung des Behandlungsgutes 6 ist es möglich, großflächiges Behandlungsgut 6 sicher mit der vorgesehenen Beschichtungsdicke und -qualität zu versehen. Ferner lässt sich das Behandlungsgut 6 so anodisieren, dass die Klemmstellen, über die der Anodenstrom fließt, kleinflächig auf dem Behandlungsgut 6 ausgebildet werden und so am Behandlungsgut 6 nach der Anodisierung nicht oder nur wenig sichtbar sind. Ferner wird mit der mehrfach nutzbaren Art der Stromübertragung an unterschiedlichen Gestellbereichen durch die sichere Stromübertragbarkeit auch zwischen Titankontaktierungen untereinander die Möglichkeit eröffnet, auch für großflächiges Behandlungsgut Universalgestellsysteme aus Titan und Titanlegierungen zu realisieren.With the proposed clamping of the material to be treated 6, it is possible to provide large-sized material to be treated 6 safely with the intended coating thickness and quality. Furthermore, the material to be treated 6 can be anodized in such a way that the nips, over which the anode current flows, are formed over a small area on the item to be treated 6 and thus are not or only slightly visible on the item to be treated 6 after the anodization. Furthermore, with the reusable nature of the power transmission to different frame areas by the safe Stromübertragbarkeit between titanium contacts with each other opens up the possibility to realize even for large-scale Behandlungsgut Universal rack systems made of titanium and titanium alloys.

Bezugszeichenliste

1
Klemmbacke
2
Klemmbacke mit Oberfläche zur punkt- oder kantenförmigen Prozessstromübertragung
3
Oberfläche gerichtet auf das Behandlungsgut
4
Erhebungen
5
Nut
6
Behandlungsgut
7
Zwischenteil
8
Oberfläche des Zwischenteils gerichtet auf das Behandlungsgut
9
Erhebungen der Oberfläche des Zwischenteils
10
Winkelbügel
11
Behandlungswanne
12
Warenträger
13
Trag- oder Spannarme
LIST OF REFERENCE NUMBERS
1
jaw
2
Jaw with surface for point or edge-shaped process flow transmission
3
Surface directed to the material to be treated
4
surveys
5
groove
6
treated
7
intermediate part
8th
Surface of the intermediate part directed to the material to be treated
9
Elevations of the surface of the intermediate part
10
angle bracket
11
treatment tub
12
goods carriers
13
Supporting or clamping arms

Claims (19)

  1. A device for the electrolytic treatment of material to be treated (6) with clamping jaws (1,2) for the material to be treated which are arranged on tensioning or carrying arms (13), wherein at least one clamping jaw (2) consists of titanium or a titanium alloy, and said titanium clamping jaw comprises, facing the material to be treated, a surface (3) with elevations (4), so that the current flow is achieved by means of contact points or contact edges of the elevations (4).
  2. A device according to claim 1, characterized in that the distance between adjacent elevations (4) is between 0.3 and 4mm.
  3. A device according to either of claims 1 or 2, characterized in that the elevations (4) are between 0.1 and 4mm in height.
  4. A device according to any one of claims 1 to 3, characterized in that the elevations (4) are designed as a pyramid form with a peak.
  5. A device according to any one of claims 1 to 3, characterized in that the elevations (4) are designed as hemispheres or as ribbing.
  6. A device according to any one of claims 1 to 3, characterized in that the elevations (4) have a prismatic form with contact edges which point towards the material to be treated.
  7. A device according to any one of claims 1 to 3, characterized in that the elevations (4) are designed as a thread profile.
  8. A device according to any one of claims 1 to 7, characterized in that on the surface (3) of the clamping jaw (2) continuous grooves (5) are arranged from outer edge to outer edge.
  9. A device according to claim 8, characterized in that the grooves (5) are arranged running in the drip-off direction in the surface (3) of the clamping jaw (2).
  10. A device according to any one of claims 1 to 10, characterized in that between the clamping jaw (2), the surface of which comprises elevations (4) and the material to be treated (6), an intermediate part (7) made of aluminium or an aluminium alloy is arranged.
  11. A device according to claim 10, characterized in that the intermediate part (7) is detachably connected to the clamping jaw (2).
  12. A device according to either of claims 10 or 11, characterized in that the intermediate part (7) comprises a smooth surface, at least on the side facing the clamping jaw (2).
  13. A device according to any one of claims 10 to 12, characterized in that the intermediate part (7) on the side facing the material to be treated (6) comprises a surface (8) with elevations (9), and preferably equipped with pegs, cones, truncated cones and/or plate fins.
  14. A device according to either of claims 11 or 13, characterized in that the clamping jaw (2) comprises at least one angle bracket (10) which in order to create a detachable connection comprises the intermediate part (7) on one side, wherein the free arm of the bracket (9) grips between the elevations (9) of the surface (8) of the intermediate part (7), without protruding over it in the direction of the material to be treated (6).
  15. A device according to any one of claims 1 to 14, characterized in that with a frame for introducing material to be treated (6) into a treatment vat (11), the current conducting transfers from the aluminium material carrier (12) to the carrying or tensioning arms (13) which consist of titanium or a titanium alloy and to the clamping jaws (2) for the material to be treated (6) are, using contactors, made of titanium, together with the surface (3) of the clamping jaws (2) which is equipped with elevations (4).
  16. A method for the electrolytic treatment in particular of large, thin, laminar material to be treated, which during the treatment is held between clamping jaws, wherein at least one clamping jaw is made of titanium or a titanium alloy, which comprises on the surface facing the material to be treated peaked or edge-shaped elevations, so that the process flow to the electrolytic treatment is guided in a punctiform manner or via edges into the material to be treated, or wherein between the material to be treated and the clamping jaw, an intermediate part made of aluminium or an aluminium alloy is arranged, so that the process flow is guided in a punctiform manner or via edges from the clamping jaw into the intermediate part, and from there into the material to be treated.
  17. A method according to claim 16, characterized in that when anodizing, currents of 4 amperes per contact point are conveyed.
  18. A method according to either of claims 16 or 17, characterized in that existing grooves in the surface of the clamping jaw equipped with elevations are used for rinsing the clamping jaw following electrolytic treatment.
  19. A method according to any one of claims 16 to 18, characterized in that the contact pressure of the clamping jaws onto the material to be treated is equal to or greater than 1.5 kp/mm2 (1.47 x 105 Pa).
EP06090143A 2006-08-18 2006-08-18 Apparatus and method for anodising workpieces Active EP1889951B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT06090143T ATE486980T1 (en) 2006-08-18 2006-08-18 DEVICE AND METHOD FOR ANODIZING ITEMS TO BE TREATED
EP06090143A EP1889951B1 (en) 2006-08-18 2006-08-18 Apparatus and method for anodising workpieces
DE502006008231T DE502006008231D1 (en) 2006-08-18 2006-08-18 Apparatus and method for anodizing items to be treated

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06090143A EP1889951B1 (en) 2006-08-18 2006-08-18 Apparatus and method for anodising workpieces

Publications (2)

Publication Number Publication Date
EP1889951A1 EP1889951A1 (en) 2008-02-20
EP1889951B1 true EP1889951B1 (en) 2010-11-03

Family

ID=37984750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06090143A Active EP1889951B1 (en) 2006-08-18 2006-08-18 Apparatus and method for anodising workpieces

Country Status (3)

Country Link
EP (1) EP1889951B1 (en)
AT (1) ATE486980T1 (en)
DE (1) DE502006008231D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3822394A1 (en) 2019-11-14 2021-05-19 WTF Galvanotechnik GmbH & Co. KG Device for holding workpieces during electrolytic treatment
EP3822393A1 (en) 2019-11-14 2021-05-19 WTF Galvanotechnik GmbH & Co. KG Device for holding workpieces during electrolytic treatment
DE102019008114A1 (en) * 2019-11-14 2021-05-20 WTF Galvanotechnik GmbH & Co. KG Device for holding workpieces during electrolytic treatment
DE102019008115B4 (en) 2019-11-14 2022-06-02 WTF Galvanotechnik GmbH & Co. KG Device for holding workpieces in electrolytic treatment

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DE102012218025A1 (en) * 2012-10-02 2014-04-03 Manfred Ingelsberger Holding device and carrier with components of aluminum and titanium materials
EP3916134A1 (en) * 2020-05-26 2021-12-01 Gramm Technik GmbH Retaining device for piston rod

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JPS5432426B2 (en) 1974-06-08 1979-10-15
GB1468118A (en) 1975-09-27 1977-03-23 Trident Plastics Ltd Clamping arrangement
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JPS60155699A (en) 1983-12-27 1985-08-15 Permelec Electrode Ltd Method for electrolyzing metal by liquid power supply method
US4615785A (en) 1985-05-13 1986-10-07 Pulido Robert J Clip for anodizing bath and method of using the clip
DE9411523U1 (en) 1993-09-08 1994-09-22 Stohrer Doduco Gmbh & Co Device for anodizing workpieces
DE10145554C1 (en) 2001-09-14 2002-11-28 Atotech Deutschland Gmbh Device for transporting and wet chemical treating and/or electrolytically treating flat and very thin material comprises support arms, a guide, supporting elements, tensioning stands with hanging elements and fixing rods
DE10245182A1 (en) 2002-09-26 2004-04-01 Manfred Ingelsberger Anodizing frame for anodizing processes has a central holding element for contacting with an electrode, and clamping elements fixed on the holding element via a hot-deformed rivet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3822394A1 (en) 2019-11-14 2021-05-19 WTF Galvanotechnik GmbH & Co. KG Device for holding workpieces during electrolytic treatment
EP3822393A1 (en) 2019-11-14 2021-05-19 WTF Galvanotechnik GmbH & Co. KG Device for holding workpieces during electrolytic treatment
DE102019008114A1 (en) * 2019-11-14 2021-05-20 WTF Galvanotechnik GmbH & Co. KG Device for holding workpieces during electrolytic treatment
DE102019008115B4 (en) 2019-11-14 2022-06-02 WTF Galvanotechnik GmbH & Co. KG Device for holding workpieces in electrolytic treatment

Also Published As

Publication number Publication date
ATE486980T1 (en) 2010-11-15
EP1889951A1 (en) 2008-02-20
DE502006008231D1 (en) 2010-12-16

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