EP3822394A1 - Dispositif de retenue de pièces lors d'un traitement électrolytique - Google Patents

Dispositif de retenue de pièces lors d'un traitement électrolytique Download PDF

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Publication number
EP3822394A1
EP3822394A1 EP20000412.5A EP20000412A EP3822394A1 EP 3822394 A1 EP3822394 A1 EP 3822394A1 EP 20000412 A EP20000412 A EP 20000412A EP 3822394 A1 EP3822394 A1 EP 3822394A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
support arm
support arms
support
frame
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.)
Pending
Application number
EP20000412.5A
Other languages
German (de)
English (en)
Inventor
Mirko Fortak
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.)
Wtf Galvanotechnik & Co Kg GmbH
Original Assignee
Wtf Galvanotechnik & Co Kg GmbH
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 DE102019008114.5A external-priority patent/DE102019008114A1/de
Priority claimed from DE202019004750.6U external-priority patent/DE202019004750U1/de
Application filed by Wtf Galvanotechnik & Co Kg GmbH filed Critical Wtf Galvanotechnik & Co Kg GmbH
Publication of EP3822394A1 publication Critical patent/EP3822394A1/fr
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/06—Suspending or supporting devices for articles to be coated
    • 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
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/06—Suspending or supporting devices for articles to be coated
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/005—Apparatus specially adapted for electrolytic conversion coating
    • 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
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/22—Servicing or operating apparatus or multistep processes
    • 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

Definitions

  • the invention relates primarily to a device for anodizing and / or for lacquer coating, in particular, metallic workpieces in a container, the workpieces being suspended from a support frame and immersed in a corresponding bath.
  • the disadvantage here is the poorer electrical conductivity (15 times less than aluminum), so that so far titanium anodes have only been used for smaller aluminum parts.
  • Another disadvantage is that contact bridges build up in an uncontrolled manner, which lead to burn-in in the aluminum item to be treated.
  • the contact current is subject to fluctuations with the consequence that the layer thickness of the layer produced by the anodizing cannot be precisely defined.
  • a contact pliers for electrophoretic painting of metal parts is proposed. Screw clamps, toggle clamps or screw compression spring loaded joint leg clamps are already known. However, their moving parts quickly become clogged with paint and are also complicated to set up. Therefore, contact pliers with two pliers legs are proposed, which are elastically connected by a U-shaped leaf spring. A conductor strip is attached to one of the pliers legs between the inside and the leaf spring. This can be connected to a connection cable at the other end. These contact pliers only have a small clamping range and a low contact pressure and are therefore only suitable for small workpieces.
  • the applicant has proposed a device and a method for the electrochemical treatment of thin material to be treated, which no longer requires continuous cleaning of the support frame and clamps, and enables a better current transfer from the clamps to the workpiece.
  • the jaws of the clamps are made of titanium and the surfaces are designed with elevations.
  • intermediate pieces made of aluminum are arranged between the workpiece and the clamping jaws, which form a wear part and improve the current transfer.
  • a device for producing an electrical connection between a goods carrier unit and the container edge of an electroplating system is proposed.
  • a goods carrier unit for placing on the container edge has wedge-shaped rails which engage in V-shaped contact bodies on the container.
  • blade contacts between contact lugs are described.
  • these variants do not allow a sufficient flow of current with larger workpieces.
  • This solution for generating sufficient contact pressure is relatively expensive and requires ongoing maintenance.
  • This variant is not very suitable for an electrical connection between a large number of workpieces and a goods carrier, since the contact area is lowered into the immersion bath here. This part of the device would also be exposed to the galvanic process and would have to be cleaned after each bath.
  • the object of the invention is to propose a support frame with support arms for the workpieces in a device for the electrolytic treatment of metallic workpieces in a container with an anodizing bath or a bath for paint coating, by means of which a secure, quickly fixable and detachable connection to the workpieces is made possible and at the same time a defined and safe power transmission from the support arms to the work pieces is guaranteed.
  • the invention provides that the first support arm of each support arm pair has an angled section or a shaped piece with which an edge of the workpiece can be fixed by reaching over and the second support arm jaw-like with an inner one Jaws and an outer jaws and cranked in the direction of the first support arm is designed to receive a further edge of the workpiece and the mouth opening is designed so that the inner jaws in a work clamped between the support arms piece exerts pressure on the workpiece.
  • the power is also supplied through the inner jaw, which ensures a preferred contact pressure of 3-8 kg / mm 2 , preferably around 5 kg / mm 2 , so that an oxidation of the contact surface - a line or a point is counteracted becomes.
  • the support arms consist of angled sections, shaped pieces and jaws for anodizing or for coating with paint made of titanium.
  • one embodiment provides that the frame struts, support arms, angled sections, fittings and jaws have a PVC coating, at least the contact points with the workpiece being excluded.
  • the inner jaw leg projects beyond the outer jaw leg, the inner jaw leg pointing into the mouth opening at an obtuse angle ⁇ .
  • the first support arm is made longer than the second support arm, in which it is curved and / or is angled or has a spiral section. In this way, despite the different resilience of the support arms, a spatial expansion of the frame strut with the workpiece can be limited.
  • the arrangement of the fastening of the first support arm to the frame strut on the side of the frame strut opposite the workpiece to be received by the support arm also acts in this sense.
  • the support arms preferably have a circular cross section which has a flat surface in the area of the contact points with the workpiece or is converted into a rectangular cross section so that the contact points run linearly.
  • the contact points can also be made point-like if the number of contacts of the current to be transmitted is sufficient in cross section.
  • the shaped pieces have notches, preferably a V-shaped or trapezoidal recess, for receiving an edge of the workpiece. It is also possible for the shaped piece to be adapted to the fastening point on the workpiece.
  • the paired support arms are arranged opposite one another on the frame struts, it being possible for the frame struts to be positioned at a distance from one another and next to one another by a frame.
  • Fig. 1 shows a device for holding workpieces during the electrolytic treatment in a container with an anodizing and / or lacquer coating bath with a frame strut 1 that can be raised and lowered a workpiece 9 can be clamped.
  • a workpiece 9 is shown in the form of a car roof rail.
  • the lower support arm 3 of each support arm pair is curved and angled with a molded piece 5 at the end removed from the frame strut 1, with which an edge of the workpiece 9 can be fixed.
  • the second upper support arm 4 is formed like a mouth with an inner jaw arm 7 and an outer jaw arm 6 and pointing in the direction of the first arm 3 to accommodate a further edge of the workpiece 9, the jaw opening being designed so that the inner jaw arm 7 with a The workpiece 9 clamped between the support arms 3, 4 exerts a pressure on the workpiece 9.
  • the support arms 3, 4, angled sections, the shaped pieces 5 and the jaws 6, 7 are made of titanium for anodizing or for lacquer coating and have a PFA coating (perfluoroalkoxy polymer) to smooth the rough titanium surface, with at least the Contact points with the workpiece 9 are excluded.
  • the use of titanium has the advantage that the spring stability of the support arms 3, 4 compared to z. B. aluminum persists over a significantly longer period of time.
  • the lower support arm 3 is longer than the second upper support arm 4, in which it is curved and angled. Furthermore, the arrangement of the fastening of the lower support arm 3 to the frame strut 1 takes place on the side of the frame strut 1 opposite the workpiece 9 to be received by the support arm 3.
  • the power supply to the workpiece 9 also takes place through the mouth-like design of the support arm 4.
  • the workpiece 9 is hooked into the mouth of the support arm 4 and moved in the direction of the frame strut 1 until a connection to the workpiece 9 is also established via the support arm 3, the workpiece 9 is braced with the jaws 6, 7, with the inner jaw 7 is pressed onto the workpiece 9 due to its length and the obtuse angle ⁇ .
  • the geometry of the jaws 6, 7 is designed in such a way that the pressure on the workpiece 9 is between 3 and 8 kg / mm 2 , preferably 5 kg / mm 2 .
  • the support arms 3, 4 preferably have a circular cross section which has a flat surface in the area of the contact points with the workpiece 9 or is converted into a rectangular cross section so that the contact points run linearly.
  • Fig. 2 shows in an enlarged representation the mode of operation of the upper support arm 4 with the mouth-like opening.
  • the support arm 4 engages over an edge of the workpiece 9, here an inner profile edge, so that the edge of the workpiece 9 comes to lie between the two jaw legs 6, 7. Because the inner jaw 7 is longer and points into the mouth opening at an obtuse angle ⁇ , a movement of the workpiece 9 in the direction of the frame strut 1 leads to a pressure build-up between the jaw 7 and the workpiece 9, while the jaw 6 acts as a support or counter bearing acts.
  • the support arm 4 like the support arm 3, is preferably arranged in a receptacle 2 of the frame strut 1.
  • Fig. 3 shows the support arm 4 with the jaws 6, 7 alone.
  • Fig. 4 shows a lower support arm 3, which has a greater length than the support arm 4 due to its curved and angled shape and is therefore more resilient.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating Apparatus (AREA)
EP20000412.5A 2019-11-14 2020-11-11 Dispositif de retenue de pièces lors d'un traitement électrolytique Pending EP3822394A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019008114.5A DE102019008114A1 (de) 2019-11-14 2019-11-14 Vorrichtung zum Halten von Werkstücken bei der elektrolytischen Behandlung
DE202019004750.6U DE202019004750U1 (de) 2019-11-14 2019-11-14 Vorrichtung zum Halten von Werkstücken bei der elektrolytischen Behandlung

Publications (1)

Publication Number Publication Date
EP3822394A1 true EP3822394A1 (fr) 2021-05-19

Family

ID=73451985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000412.5A Pending EP3822394A1 (fr) 2019-11-14 2020-11-11 Dispositif de retenue de pièces lors d'un traitement électrolytique

Country Status (2)

Country Link
EP (1) EP3822394A1 (fr)
CN (1) CN112795973A (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176850A (en) * 1962-12-17 1965-04-06 Ernest B Rosner Anodizing rack and method of making same
DE1241887B (de) 1964-06-01 1967-06-08 Leipzig Galvanotechnik Vorrichtung zur Herstellung einer elektrischen Verbindung bei einer Galvanisieranlage
US3596585A (en) * 1969-03-10 1971-08-03 Uni Chem Corp Film holder
FR2112601A5 (en) * 1970-11-02 1972-06-23 Duraliris Shaped wire suspension device - for supporting articles to be electrolytically treated
DE3115258A1 (de) * 1981-04-15 1982-12-09 Richard 6742 Herxheim Kupper Kontaktklammer fuer die anodische oxidation von aluminium-werkstuecken
DE8502551U1 (de) 1985-01-31 1985-05-09 Kever, Helmut, 8900 Augsburg Kontaktzange, insbesondere fuer die elektrophoretische lackierung von metallteilen
DE9411523U1 (de) 1993-09-08 1994-09-22 Stohrer Doduco Gmbh & Co Vorrichtung zum anodischen Oxidieren von Werkstücken
DE10145554C1 (de) 2001-09-14 2002-11-28 Atotech Deutschland Gmbh Vorrichtung zur naßchemischen und elektrolytischen Behandlung von sehr dünnem und flachem Behandlungsgut
US7798340B2 (en) * 2006-12-15 2010-09-21 Shenzhen Futaihong Precision Industry Co., Ltd. Rack apparatus with retaining member for use in anodizing
EP1889951B1 (fr) 2006-08-18 2010-11-03 Wolf-Thilo Fortak Industrieberatung und techn. Sevice für die Galvanotechnik Appareil et procédé pour l'anodisation de pièces à usiner
DE202015005883U1 (de) * 2015-08-20 2016-11-23 Bertold Oberle Ohg Eintauchhalterung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2802238B2 (ja) * 1994-12-17 1998-09-24 立山合金工業株式会社 縦吊式被処理物のラッキングレバー
JP5833355B2 (ja) * 2011-06-30 2015-12-16 アルメックスＰｅ株式会社 表面処理装置
KR101500966B1 (ko) * 2011-06-30 2015-03-10 아루멕쿠스 피이 가부시키가이샤 표면 처리 장치 및 워크 유지 지그

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176850A (en) * 1962-12-17 1965-04-06 Ernest B Rosner Anodizing rack and method of making same
DE1241887B (de) 1964-06-01 1967-06-08 Leipzig Galvanotechnik Vorrichtung zur Herstellung einer elektrischen Verbindung bei einer Galvanisieranlage
US3596585A (en) * 1969-03-10 1971-08-03 Uni Chem Corp Film holder
FR2112601A5 (en) * 1970-11-02 1972-06-23 Duraliris Shaped wire suspension device - for supporting articles to be electrolytically treated
DE3115258A1 (de) * 1981-04-15 1982-12-09 Richard 6742 Herxheim Kupper Kontaktklammer fuer die anodische oxidation von aluminium-werkstuecken
DE8502551U1 (de) 1985-01-31 1985-05-09 Kever, Helmut, 8900 Augsburg Kontaktzange, insbesondere fuer die elektrophoretische lackierung von metallteilen
DE9411523U1 (de) 1993-09-08 1994-09-22 Stohrer Doduco Gmbh & Co Vorrichtung zum anodischen Oxidieren von Werkstücken
DE10145554C1 (de) 2001-09-14 2002-11-28 Atotech Deutschland Gmbh Vorrichtung zur naßchemischen und elektrolytischen Behandlung von sehr dünnem und flachem Behandlungsgut
EP1889951B1 (fr) 2006-08-18 2010-11-03 Wolf-Thilo Fortak Industrieberatung und techn. Sevice für die Galvanotechnik Appareil et procédé pour l'anodisation de pièces à usiner
US7798340B2 (en) * 2006-12-15 2010-09-21 Shenzhen Futaihong Precision Industry Co., Ltd. Rack apparatus with retaining member for use in anodizing
DE202015005883U1 (de) * 2015-08-20 2016-11-23 Bertold Oberle Ohg Eintauchhalterung

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