EP3310946B1 - Verfahren zur behandlung von oberflächen aus geometrisch komplexen teilen, teiletragende vorrichtung und behandlungsvorrichtung - Google Patents

Verfahren zur behandlung von oberflächen aus geometrisch komplexen teilen, teiletragende vorrichtung und behandlungsvorrichtung Download PDF

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Publication number
EP3310946B1
EP3310946B1 EP16736533.7A EP16736533A EP3310946B1 EP 3310946 B1 EP3310946 B1 EP 3310946B1 EP 16736533 A EP16736533 A EP 16736533A EP 3310946 B1 EP3310946 B1 EP 3310946B1
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Prior art keywords
carrier
treatment
parts
electrode
tank
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EP16736533.7A
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English (en)
French (fr)
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EP3310946A1 (de
Inventor
Maxence Renaud
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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
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/06—Suspending or supporting devices for articles to be coated
    • C25D17/08—Supporting racks, i.e. not for suspending
    • 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
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/10—Agitating of electrolytes; Moving of racks
    • 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
    • C25D7/06—Wires; Strips; Foils

Definitions

  • the present invention generally relates to the electrolytic surface treatment or anodic oxidation, including electroplating, surfaces of metal parts or metallizable plastic (ABS, PA, PP, A8S PC, ...) of complex geometry.
  • the parts whose faces are intended to be coated by electrolytic treatment, in particular electroplating are arranged in an electrolysis bath contained in a treatment tank by means of a workpiece constituting the cathode of the device.
  • the parts are placed in the tank in a fixed position opposite the anodes of the treatment device so that the surfaces to be treated parts as much as possible directly facing the anodes.
  • the streamlines in the bath conventionally going from anodes to cathodes primarily reach the surfaces of the parts directly exposed to the anodes.
  • This situation is acceptable for the treatment of parts of simple geometry where the surfaces to be treated parts are all sufficiently exposed to the current lines when the part is in a fixed initial position.
  • parts of complex geometry that is to say which in the fixed initial position have surfaces that are totally or partially masked with respect to the anodes, the current lines will only partially reach, or even not at all those surfaces with little or no exposure to the anodes.
  • the inventors have studied the impact of current lines on the surfaces of parts to be treated, of complex geometry, as a function of the orientation of the parts relative to the anodes of a treatment device. This study is illustrated schematically by the Figures 1A to 1C .
  • the parts 6 to be treated are in an initial neutral position with respect to the anodes 2.
  • the impact of the current lines 3 is certainly 80% on the surface A of the parts, but is respectively than 10%, 20% and 10% for surfaces B, C and D.
  • the present invention therefore aims to solve the problem of the standardization of electrolytic treatment or anodic oxidation, in particular by electroplating, the surfaces of parts of complex geometry and, more particularly, the uniformization of electroplating deposits. .
  • the documents FR-2832429 and FR-2714079 describe workpiece carriers for electrolytic treatment or anodic oxidation.
  • the objects to be treated are arranged on horizontal rods rotatable about their longitudinal axis. The rotation is carried out once the treatment is completed after removal of the workpiece-holding device from the treatment bath, and is intended to eliminate the excess of treatment bath that may remain in the parts.
  • the document GB-1,428,856 describes a device in which the workpieces carried by horizontal bars are able to oscillate freely during the treatment to ensure agitation of the treatment bath.
  • the present invention proposes a process for electrolytic treatment or anodic oxidation, in particular electroplating, of parts surfaces, of complex geometry, ensuring optimum access to surfaces. complex parts during treatment.
  • the subject of the present invention is such a method of electrolytic or anodic oxidation treatment which ensures optimal exposure of the surfaces of complex parts to the current lines during the treatment and, consequently, treatment, for example electrolytic deposition, as uniform as possible, of the surfaces of the complex parts.
  • the invention also relates to an electrolytic treatment device or anodic oxidation designed for the implementation of the method.
  • the invention relates to a workpiece capable of ensuring optimal exposure of complex parts surfaces to the current lines during electrolytic treatment or anodic oxidation, including electroplating.
  • angles of rotation of the complex parts are chosen as a function of the treatment and the geometry of the parts, so as to optimally expose the surfaces initially not exposed to the current lines established during the treatment.
  • the pieces of complex geometry are rotated sequentially at different angles on either side of their neutral initial position and are maintained in each of these different positions for a sufficient processing time to obtain as uniform a treatment as possible of the surfaces of the parts, in particular an electrolytic deposit, for example by electroplating.
  • the method of the invention can be implemented by means of a computer program designed according to the geometric complexity of the parts to be treated and the planned treatment.
  • the parts to be treated are held back-to-back in pairs along the supports.
  • the treatment tank comprises, inside the tank, arranged vertically, a first electrode, typically an anode, a third electrode of the same polarity as the first electrode and spaced from this first electrode, the workpiece holder being removably disposed between the first and third electrode.
  • the first and the third electrode are anodes and the workpiece device constitutes a cathode;
  • the actuator of the control member is integral with the treatment tank.
  • the treatment device according to the invention may comprise several successive treatment tanks for the complete treatment of the parts, the parts to be treated being placed successively in the different tanks for their treatment by means of a single piece holder according to the invention.
  • the actuator of the control member may be integral with the workpiece holder and will be transported with the tank-piece holder in the tank until completion of the parts processing process.
  • control member comprises a control arm connectable to an external actuator, in particular fixed on a treatment tank.
  • the piece carrier 1 comprises a frame 2 generally rectangular, electroconductive material, having an upper side 2a, a lower side 2b and two lateral sides 2c.
  • This rotary holding can be done by means of bearings 4, for example plain bearings, integral with the upper 2a and lower 2b sides of the frame 2.
  • Fastening means 5 of the parts 6, for example clips, clips or springs are arranged along the supports.
  • the attachment means 5 of the parts are arranged along the supports 3 so as to maintain the parts 6 in opposite pairs.
  • other arrangements of the attachment means 5, for example staggered are possible depending on the geometry of the workpieces and treatments envisaged.
  • each of the rotary supports 3 is provided with a pinion 7 which meshes with a rack 8 secured to the upper side 2a of the armature 2.
  • a rack 8 secured to the upper side 2a of the armature 2.
  • One end of the rack 8 is integral with a maneuvering arm 9 whose free end can be removably connected to the control rod 11 of a linear actuator 10 such as a cylinder.
  • the upper side 2a of the armature is a bar ensuring the maintenance of the armature 2 in a treatment tank and the supply of current in the rotary supports 3.
  • the frame 2, the supports 3 and attachment means 5 parts are electrically conductive material and together constitute an electrode, in particular the cathode of an electrolytic treatment device or anodic oxidation, in particular electroplating, and means are provided, generally on the upper side 2a by connection to a current source.
  • the workpiece carrier 1 according to the invention is particularly designed for use in an electrolytic treatment or anodic oxidation device, in particular the electroplating, and the implementation of the method of the invention.
  • the Figure 5 represents the workpiece carrier 1 of the invention set up in a treatment tank 20 of a device according to the invention. As shown in Figure 5 , the treatment tank 20 is of generally parallelepiped shape.
  • the vessel 20 comprises an open upper face 20a, a bottom 20b and two pairs of opposite side walls, a main pair 20c, 20d and a secondary pair 20e, 20f.
  • a set of electrodes 21a, 21b is arranged vertically along each of the opposite main side walls 20c, 20d and is for example in the form of vertical and parallel rectangular electroconductive strips.
  • the workpiece carrier 1 is arranged and held vertically in the tank 20 between the sets of electrodes 21a, 21b, the ends of the upper side 2a of the frame 2 resting on the upper edges of the secondary side walls 20e, 20f, the supports 3 being then vertically arranged in front of the sets of electrodes 21a, 21b, in particular of each of the strips constituting the sets of electrodes.
  • a linear actuator 10 is fixed to the upper flange of a secondary side wall 20e and removably connected by its control rod 11 to the operating arm 9 of the rack 8.
  • FIGS. 9 and 10 are front and perspective views of a treatment device according to the invention with the workpiece holder 1 outside the treatment tank 20 before or after a treatment.
  • the linear actuator 10 remains on the tank 20 after disengagement of the operating arm 9 from the rack 8.
  • the device according to the invention may comprise several successive tanks as described above for successive successive treatments of the parts 6 carried by the same carrier 1.
  • the workpiece carrier 1 described above with the parts 6 of complex geometry to be treated arranged on the rotary supports 3, is placed vertically in a treatment tank 20 containing an electrolyte bath, between the sets of anodes 21a and 21b, the upper bar 20c of the armature 2 resting on opposite sides of the upper open surface 20a constituting the upper edges of the secondary side surfaces 20e, 20f of the vessel 20 not provided with anodes.
  • the bar 2a is connected to a current source, for example by means of a conductive braid or contact ves (not shown).
  • the rotary supports 3 are electrically connected to the bar 2a by means of conductive braids (not shown).
  • the armature 2 and the parts 6 form a cathode in front of the anode sets 21a and 21b.
  • the rack 8 is connected via the operating arm 9 to the rod 11 of a linear actuator 10, for example a cylinder, fixed on the upper edge of the secondary lateral surface 20e of the tank 20.
  • a linear actuator 10 for example a cylinder
  • the supports 3, and consequently the parts to be treated 6, are in a neutral initial position in which the "a" surfaces of the parts 6 face the anodes 21a, 21b directly and are directly impacted by the lines current L being established between the anodes and the cathode during the treatment.
  • the surfaces "b" and "c" of the parts 6 which are not in front of the anodes 21a, 21b, are little or not impacted by the current lines L.
  • the linear actuator 10 is sequentially activated.
  • the linear actuator 10 is then activated a second time to advance the rod 11 and thus translate to the left of the rack 8.
  • This translation to the left of the rack 8 has the effect of pivoting the supports 3 in the counter-clockwise, here at a 45 ° angle to the neutral initial position.
  • the holding time at each of the selected positions will depend on the processing and the geometric complexity of the parts.
  • angles of rotation and the holding time at the different angular positions will be chosen so as to obtain a deposit which is as homogeneous as possible and in particular of as equal thickness as possible.
  • the sequence of rotations during a process can be controlled automatically by computer program.
  • the operating arm 9 is locked in the neutral position and is disconnected from the rod 11 of the actuator and the upper bar 2a is disconnected.
  • the piece carrier 1, with the treated parts 6, is then removed from the tank 20, the actuator 10 remaining fixed on the tank 20.
  • the piece carrier 1, with the parts 6, can then be placed in another treatment chamber for another electrolytic treatment or other treatment, for example drying, cooking, etc., or the parts 6 can be dismounted from the workpiece holder 1 and stored before shipment.

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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)

Claims (14)

  1. Elektrolytisches Verfahren oder Verfahren mit anodischer Oxidation zur Behandlung einer Oberfläche mit Einsetzen von Teilen (6) aus Metall oder aus metallisierbarem Kunststoff mit komplexer Geometrie mittels eines eine erste Elektrode bildenden entfernbaren Teileträgers (1) in eine neutrale Anfangsposition in einem Behandlungsbad, das in einem Behälter (20) enthalten ist, der wenigstens eine zweite (21a, 21b), der ersten Elektrode entgegengesetzt polarisierte Elektrode aufweist,
    dadurch gekennzeichnet, daß
    a) die Teile (6) komplexer Geometrie dergestalt sind, daß die Oberflächen dieser Teile (6) komplexer Geometrie in einer neutralen Anfangsposition kaum oder gar nicht von den Stromlinien erfaßt werden, die sich bei der Durchführung des Behandlungsverfahrens zwischen der ersten und der zweiten Elektrode einstellen,
    b) die Teile (6) komplexer Geometrie während der Behandlung derselben aufeinanderfolgenden Drehungen zu beiden Seiten ihrer neutralen Anfangsposition (0 Grad) um einen Winkel, der bis zu 90° gehen kann, unterzogen werden, um die in der neutralen Anfangsposition kaum oder gar nicht von den Stromlinien erfaßten Oberflächen der Teile in größerem Maße den Stromlinien auszusetzen.
  2. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, daß der Drehwinkel der Teile (6) 45° beiderseits der neutralen Anfangsposition beträgt.
  3. Verfahren gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß die zu behandelnden Teile (6) in den verschiedenen Winkelpositionen, die sich aus den aufeinanderfolgenden Drehungen ergeben, während eines Zeitraums gehalten werden, der in Abhängigkeit von der Behandlung und von der geometrischen Komplexität der Teile (6) bestimmt wird.
  4. Teileträger (1) für eine elektrolytische Behandlung oder eine Behandlung mit anodischer Oxidation von Teilen (6) komplexer Geometrie mit
    - einer Armatur (2) aus einem elektrisch leitenden Material, die die eine obere (2a) und eine untere (2b) horizontale Seite hat, die durch zwei seitliche senkrechte Seiten (2c, 2d) miteinander verbunden sind,
    - drehbeweglichen Unterlagen (3), die dazu ausgelegt sind, die zu behandelnden Teile (6) zu tragen,
    dadurch gekennzeichnet, daß
    - die beweglichen Unterlagen (3) zwischen der oberen Seite (2a) und der unteren Seite (2b) der Armatur (2) senkrecht gehalten werden, um um eine senkrechte Schwenkachse schwenken zu können, und
    - das obere Ende jeder der beweglichen Unterlagen (3) ein Element (7) aufweist, das mit einem Steuerungsorgan (8) zusammenwirkt, dessen Betätigung die beweglichen Unterlagen (3) aufeinanderfolgend beiderseits einer neutralen Anfangsposition schwenken läßt.
  5. Teileträger (1) gemäß Anspruch 4, dadurch gekennzeichnet, daß der maximale Drehwinkel 90° und vorzugsweise mindestens 45° beträgt.
  6. Teileträger (1) gemäß Anspruch 4 oder 5, dadurch gekennzeichnet, daß das Steuerungsorgan (8) mit der oberen Seite (2a) der Armatur (2) fest verbunden ist.
  7. Teileträger (1) gemäß einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß die obere Seite (2a) der Armatur (2) aus einer Stange besteht, die das Einsetzen in einen Behandlungsbehälter (20) und das darin senkrecht Halten des Teileträgers (1) sowie das Zuführen von Strom zu dem Teileträger (1) ermöglicht.
  8. Teileträger (1) gemäß einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß das Steuerungsorgan (8) dazu ausgelegt ist, trennbar mit einem Betätigungselement (10) verbunden zu werden.
  9. Teileträger (1) gemäß einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, daß das Steuerungsorgan (8) eine Zahnstange ist, die sich linear in einer Hin- und Herbewegung verlagert und daß die Elemente (7) an den oberen Enden der beweglichen Unterlagen (3) Zahnräder sind, die mit der Zahnstange (8) kämmen.
  10. Teileträger (1) gemäß einem der Ansprüche 8 bis 9, dadurch gekennzeichnet, daß das Betätigungselement (10) mit dem Teileträger fest verbunden ist und mit diesem transportierbar ist.
  11. Teileträger gemäß einem der Ansprüche 4 bis 10, dadurch gekennzeichnet, daß das Steuerungsorgan (8) einen Steuerungsarm (9) aufweist, der mit einem äußeren, insbesondere an einem Behandlungsbehälter befestigten Betätigungselement verbindbar ist.
  12. Vorrichtung zur elektrolytischen Behandlung oder zur Behandlung durch anodische Oxidation, dadurch gekennzeichnet, daß sie
    - wenigstens einen Behandlungsbehälter (20), der eine offene obere Oberfläche (20a) hat und dazu ausgelegt ist, ein Behandlungsbad zu enthalten,
    - wenigstens eine in dem Behälter (20) senkrecht angeordnete erste Elektrode (21a, 21b), vorzugsweise eine Anode,
    - einen Teileträger (1) gemäß einem der Ansprüche 4 bis 11, der eine zweite Elektrode mit der ersten Elektrode (21a, 21b) entgegengesetzter Polarität bildet, die in dem Behälter (20) senkrecht angeordnet werden kann, so daß sich die vom Teileträger (1) getragenen Teile (6) komplexer Geometrie gegenüber der ersten Elektrode (21a, 21b) in einer neutralen Anfangsposition befinden, und
    - wenigstens ein Betätigungselement (10) für das Steuerungsorgan (8) des Teileträgers (1)
    aufweist.
  13. Vorrichtung gemäß Anspruch 12, dadurch gekennzeichnet, daß die erste Elektrode aus zwei Elektrodensätzen (21a, 21b) besteht und der Teileträger (1) zwischen den beiden Elektrodensätzen angeordnet ist.
  14. Vorrichtung gemäß Anspruch 12 oder 13, dadurch gekennzeichnet, daß das Betätigungselement (10) mit dem Behandlungsbehälter (20) fest verbunden ist oder mit dem Teileträger (1) mitgenommen wird.
EP16736533.7A 2015-06-17 2016-06-17 Verfahren zur behandlung von oberflächen aus geometrisch komplexen teilen, teiletragende vorrichtung und behandlungsvorrichtung Active EP3310946B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1555540A FR3037600B1 (fr) 2015-06-17 2015-06-17 Procede de traitement de surfaces de pieces de geometrie complexe, dispositif porte-pieces et dispositif de traitement
PCT/FR2016/051481 WO2016203173A1 (fr) 2015-06-17 2016-06-17 Procédé de traitement de surfaces de pièces de géométrie complexe, dispositif porte-pièces et dispositif de traitement

Publications (2)

Publication Number Publication Date
EP3310946A1 EP3310946A1 (de) 2018-04-25
EP3310946B1 true EP3310946B1 (de) 2019-04-03

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EP16736533.7A Active EP3310946B1 (de) 2015-06-17 2016-06-17 Verfahren zur behandlung von oberflächen aus geometrisch komplexen teilen, teiletragende vorrichtung und behandlungsvorrichtung

Country Status (7)

Country Link
US (1) US10858752B2 (de)
EP (1) EP3310946B1 (de)
ES (1) ES2733299T3 (de)
FR (1) FR3037600B1 (de)
MX (1) MX2017016475A (de)
PT (1) PT3310946T (de)
WO (1) WO2016203173A1 (de)

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CN110318087A (zh) * 2019-06-17 2019-10-11 安徽启明表面技术有限公司 一种方便拆卸金属表面处理用电镀挂具

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CN108034977A (zh) * 2017-10-26 2018-05-15 昆山鑫益泉机械设备有限公司 一种适用于微弧氧化工艺的双飞靶氧化槽
CN109119605A (zh) * 2018-08-01 2019-01-01 马春国 一种含锂过渡金属氮化物层结构隔湿设备以及隔湿方法
EP3916134A1 (de) * 2020-05-26 2021-12-01 Gramm Technik GmbH Haltevorrichtung für kolbenstangen

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CN110318087A (zh) * 2019-06-17 2019-10-11 安徽启明表面技术有限公司 一种方便拆卸金属表面处理用电镀挂具
CN110318087B (zh) * 2019-06-17 2021-05-25 安徽启明表面技术有限公司 一种方便拆卸金属表面处理用电镀挂具

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Publication number Publication date
EP3310946A1 (de) 2018-04-25
PT3310946T (pt) 2019-06-28
US20180163320A1 (en) 2018-06-14
FR3037600A1 (fr) 2016-12-23
WO2016203173A1 (fr) 2016-12-22
US10858752B2 (en) 2020-12-08
FR3037600B1 (fr) 2017-06-23
MX2017016475A (es) 2018-05-17
ES2733299T3 (es) 2019-11-28

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