EP0432559A1 - Process and apparatus for electrolytic welding - Google Patents

Process and apparatus for electrolytic welding Download PDF

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Publication number
EP0432559A1
EP0432559A1 EP90122577A EP90122577A EP0432559A1 EP 0432559 A1 EP0432559 A1 EP 0432559A1 EP 90122577 A EP90122577 A EP 90122577A EP 90122577 A EP90122577 A EP 90122577A EP 0432559 A1 EP0432559 A1 EP 0432559A1
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EP
European Patent Office
Prior art keywords
roller
seam
electroplating
coating device
connection
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.)
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EP90122577A
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German (de)
French (fr)
Inventor
Wolfgang Dipl.-Ing. Semrau
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Publication of EP0432559A1 publication Critical patent/EP0432559A1/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
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/22—Electroplating combined with mechanical treatment during the deposition
    • 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
    • C25D17/10—Electrodes, e.g. composition, counter electrode
    • C25D17/14—Electrodes, e.g. composition, counter electrode for pad-plating
    • 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
    • C25D5/04—Electroplating with moving electrodes
    • C25D5/06—Brush or pad plating

Definitions

  • the invention relates to an electroplating process for producing a metallic connection between two metal surfaces.
  • Galvanic production of metallic connections between two metallic parts is known. It is mostly used when the parts to be connected should not be exposed to heat. This is the case, for example, in aircraft construction, where riveted joints or adhesive technology are chosen as the joining process in order to avoid high thermal loads.
  • Galvanotechnical joining processes are based on the principle of the galvanic deposition of metallic layers in the galvanic bath. Such a method is described in "85 Materials Engineering 3-77", pages 42 and 43. This process has disadvantages: firstly, the components to be connected must be completely immersed in a galvanic bath and secondly, the connection is only possible between two surfaces that are at a flat angle to each other. If the parts to be connected were at an acute angle to one another, then because of the unequal paths between the cathode and the anode, the deposited material would deposit unevenly on the cathode, ie on the surfaces to be connected.
  • the invention has for its object to develop a generic method so that the production of a metallic connection between two at any angle to each other metal surfaces is possible, and that the components do not have to be immersed in a galvanic bath. Furthermore, a device for performing the method is to be specified.
  • the electrolyte liquid is applied to the surfaces to be connected in the connection area by a rotating, galvanic coating device with an integrated anode.
  • a rotating, galvanic coating device with an integrated anode.
  • the use of the method according to the invention makes it possible to produce a continuous seam.
  • the surfaces to be connected are not connected to each other at certain points, but continuously, even if the seam has a relatively complicated course. It is both the laying of a V-seam with or without root as well as the blunt joining of components is possible.
  • the seam thickness can be determined by the appropriate coordination of time and current strength. If the contact pressure of the roll is selected accordingly depending on the time and current strength, the method is able to follow the different seam geometry as the layer builds up; this makes it economically feasible since post-processing is not required.
  • a galvanic thick layer system such as thick nickel plating or the like, is preferably used as the electrolyte in order not to make the metal application too lengthy and thus to further improve the economy.
  • the use of electrolytes from which alloys are deposited is also conceivable in order to improve the adaptation of the filler material to the construction material.
  • the contact pressure of the coating device is selected such that, in the case of the production of the coating device from abrasive materials, the contact pressure at the beginning of the coating is greater than in the later course of the connection process in favor of a faster layer build-up. This procedure is particularly important for connections between titanium and stainless steels.
  • the coating device As a roll adapted to the seam geometry and the production of the same from an elastic material, an optimal connection between the components is achieved.
  • the elastic material of the roll adapts to the seam root at the beginning of the joining process, later in the process of the seam geometry. Due to the deformation of the roll, a seam limit can also be specified, which means that further processing of the resulting connection is not necessary.
  • abrasive materials as the roll material in connection with the rotational movement of the roll, it is achieved that the surfaces to be connected are mechanically activated.
  • the coating device has in its axle bearing a sensor, preferably a pressure sensor.
  • the contact pressure of the roll can be regulated by comparing the actual contact pressure with the specified target value.
  • the feature of providing the anode with an insulation coating at the points from which no current flow is to take place advantageously enables a geometrically controlled deposition to be carried out while avoiding undesirable flank build-up.
  • the materials A and B to be joined touch at the beginning of the method at a point C.
  • a roller 1 is brought into the connection area, which rotates about its axis 2, which is also its axis of symmetry.
  • the axis 2 can be moved in the direction of the arrow 3.
  • the roller 1 has moved up in the joining area near the point of contact C of the two materials A and B to be joined.
  • the roller 1 is made of an elastic material and it has an anode 4 integrated in it. In the areas from which no current should flow, the anode 4 is coated with an insulator 6. If current is supplied to the anode 4, the deposition process begins.
  • the deposited material initially collects in the immediate vicinity of point C (Fig. 1).
  • the roller 1 is moved out of the connection area (FIG. 2).
  • the contact pressure is also lower than at the start of the connection process.
  • the elastic roll material of the roll 1 follows the seam geometry.
  • the radius R of the roller 1 increases in the course of the process. If the width of the building seam 5 is wider than the roll width, the entire width can be built up evenly by a straight or oscillating movement (arrow 7) of the roll 1 transverse to the seam 5.

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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)
  • Mechanical Engineering (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

An electrolytic process for producing a metallic joint between two metal surfaces and an apparatus for carrying it out are disclosed. In the process the electrolyte liquid is fed through a rotating electroplating device (1) with built-in anode (4) to the region of the joint and applied to the surfaces (A, B) to be joined. As a result, the immersion of the components in a plating bath is unnecessary. A joint between two components at an acute angle to one another is possible. The plating device is a roller (1) whose shape is matched to the seam geometry. Preferably, the roller (1) is made of an elastic material. …<IMAGE>…

Description

Die Erfindung betrifft ein galvanotechnisches Verfahren zur Herstellung einer metallischen Verbindung zwischen zwei Metalloberflächen.The invention relates to an electroplating process for producing a metallic connection between two metal surfaces.

Galvanische Herstellung metallischer Verbindungen zwischen zwei metallischen Teilen ist bekannt. Sie wird meistens dann eingesetzt, wenn die zu verbindenden Teile keine Wärmebeaufschlagung erfahren sollten. Dies ist der Fall z.B. im Flugzeugbau, wo zwecks Vermeidung einer hohen Wärmebelastung Nietverbindungen oder Klebetechnik als Fügeverfahren gewählt wird. Galvanotechnische Fügeverfahren basieren auf dem Prinzip der galvanischen Abscheidung metallischer Schichten im galvanischen Bad. Ein solches Verfahren ist in "85 Materials Engineering 3-77", Seite 42 und 43, beschrieben. Dieses Verfahren ist mit Nachteilen behaftet: erstens müssen die zu verbindenden Bauteile ganz in ein galvanisches Bad eingetaucht werden und zweitens, die Verbindung ist nur zwischen zwei, unter einem flachen Winkel zueinander stehenden Oberflächen möglich. Würden die zu verbindenden Teile unter einem spitzen Winkel zueinander stehen, so würde aufgrund der ungleichen Wege zwischen Kathode und Anode eine ungleichmäßige Anlagerung des abgeschiedenen Materials an der Kathode, d.h. an den zu verbindenden Oberflächen stattfinden.Galvanic production of metallic connections between two metallic parts is known. It is mostly used when the parts to be connected should not be exposed to heat. This is the case, for example, in aircraft construction, where riveted joints or adhesive technology are chosen as the joining process in order to avoid high thermal loads. Galvanotechnical joining processes are based on the principle of the galvanic deposition of metallic layers in the galvanic bath. Such a method is described in "85 Materials Engineering 3-77", pages 42 and 43. This process has disadvantages: firstly, the components to be connected must be completely immersed in a galvanic bath and secondly, the connection is only possible between two surfaces that are at a flat angle to each other. If the parts to be connected were at an acute angle to one another, then because of the unequal paths between the cathode and the anode, the deposited material would deposit unevenly on the cathode, ie on the surfaces to be connected.

Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Verfahren so zu entwickeln, daß die Herstellung einer metallischen Verbindung zwischen zwei unter einem beliebigen Winkel zueinander stehenden Metalloberflächen möglich ist, und daß die Bauteile nicht in ein galvanisches Bad eingetaucht werden müssen. Ferner soll eine Vorrichtung zur Durchführung des Verfahrens angegeben werden.The invention has for its object to develop a generic method so that the production of a metallic connection between two at any angle to each other metal surfaces is possible, and that the components do not have to be immersed in a galvanic bath. Furthermore, a device for performing the method is to be specified.

Diese Aufgabe wird durch die im kennzeichnenden Teil des Hauptanspruches angegebene Erfindung gelöst.This object is achieved by the invention specified in the characterizing part of the main claim.

Die Unteransprüche geben vorteilhafte Weiterbildungen an.The subclaims indicate advantageous further developments.

Erfindungsgemäß wird die Elektrolytflüssigkeit in den Verbindungsbereich durch eine rotierende, galvanische Beschichtungsvorrichtung mit integrierter Anode auf die zu verbindenden Oberflächen aufgebracht. Dadurch entfällt das Eintauchen der Bauteile in ein galvanisches Bad. Durch das Auftragen des Elektrolytes über eine Beschichtungsvorrichtung, die unmittelbar an der Kontaktstelle zwischen den zu verbindenden Bauteilen eingesetzt ist, ist es möglich, Bauteile miteinander zu verbinden, die unter spitzen Winkeln zueinander stehen. Der Verbindungsbereich umfaßt somit Winkel von nahezu 0 bis 180°. Durch die Rotationsbewegung der Beschichtungsvorrichtung wird erreicht, daß die Oxydschichten der Bauteile mechanisch abgetragen werden. Die Haltbarkeit der Verbindung wird dadurch erhöht.According to the invention, the electrolyte liquid is applied to the surfaces to be connected in the connection area by a rotating, galvanic coating device with an integrated anode. This eliminates the need to immerse the components in a galvanic bath. By applying the electrolyte via a coating device which is used directly at the contact point between the components to be connected, it is possible to connect components to one another which are at acute angles to one another. The connection area thus comprises angles of almost 0 to 180 °. The rotational movement of the coating device ensures that the oxide layers of the components are removed mechanically. This increases the durability of the connection.

Durch die Anwendung des erfindungsgemäßen Verfahrens ist die Herstellung einer kontinuierlichen Naht möglich. Die zu verbindenden Oberflächen werden nicht punktuell, sondern kontinuierlich miteinander verbunden, auch wenn die Naht einen relativ komplizierten Verlauf aufweist. Es ist sowohl das Legen einer V-Naht mit oder ohne Wurzel als auch das stumpfe Aneinanderfügen von Bauteilen möglich.The use of the method according to the invention makes it possible to produce a continuous seam. The surfaces to be connected are not connected to each other at certain points, but continuously, even if the seam has a relatively complicated course. It is both the laying of a V-seam with or without root as well as the blunt joining of components is possible.

Ein weiterer Vorteil der Erfindung ist, daß die Nahtstärke durch die entsprechende Abstimmung von Zeit- und Stromstärke bestimmbar ist. Wird der Anpreßdruck der Rolle in Abhängigkeit von Zeit- und Stromstärke entsprechend gewählt, so ist das Verfahren in der Lage, der unterschiedlichen Nahtgeometrie bei sich aufbauender Schicht zu folgen; damit wird es wirtschaftlich optimal durchführbar, da eine Nachbearbeitung entfällt.Another advantage of the invention is that the seam thickness can be determined by the appropriate coordination of time and current strength. If the contact pressure of the roll is selected accordingly depending on the time and current strength, the method is able to follow the different seam geometry as the layer builds up; this makes it economically feasible since post-processing is not required.

Als Elektrolyt wird vorzugsweise ein galvanisches Dickschichtsystem eingesetzt, wie Dickvernickelung oder ähnliche, um den Metallauftrag nicht zu langwierig zu gestalten und damit die Wirtschaftlichkeit weiter zu verbessern. Vorstellbar ist auch der Einsatz von Elektrolyten aus denen Legierungen abgeschieden werden, um die Anpassung des Zusatzwerkstoffes an den Konstruktionswerkstoff zu verbessern.A galvanic thick layer system, such as thick nickel plating or the like, is preferably used as the electrolyte in order not to make the metal application too lengthy and thus to further improve the economy. The use of electrolytes from which alloys are deposited is also conceivable in order to improve the adaptation of the filler material to the construction material.

Mit dem erfindungsgemäßen Verfahren ist es möglich, sehr komplizierte Bauteile miteinander zu verbinden, wie z.B. Wabenstrukturen im Flugzeugbau oder geschäumte Metalle. So bereitet es keine Schwierigkeiten, z.B. eine Aluminium-Wabe mit einem anderen Bauteil zu verbinden.With the method according to the invention, it is possible to connect very complicated components, e.g. Honeycomb structures in aircraft construction or foamed metals. So there are no difficulties, e.g. to connect an aluminum honeycomb to another component.

Gemäß einer weiteren vorteilhaften Ausgestaltung des erfindungsgemäßen Verfahrens wird der Anpreßdruck der Beschichtungsvorrichtung so gewählt, daß für den Fall der Herstellung der Beschichtungsvorrichtung aus abrasiven Materialien der Anpreßdruck zu Beginn der Beschichtung größer ist als im späteren Verlauf des Verbindungsprozesses zugunsten eines schnelleren Schichtaufbaues. Von besonderer Bedeutung ist diese Vorgehensweise für Verbindungen von Titan und Edelstählen.According to a further advantageous embodiment of the method according to the invention, the contact pressure of the coating device is selected such that, in the case of the production of the coating device from abrasive materials, the contact pressure at the beginning of the coating is greater than in the later course of the connection process in favor of a faster layer build-up. This procedure is particularly important for connections between titanium and stainless steels.

Durch die vorteilhafte Ausgestaltung der Beschichtungsvorrichtung als eine der Nahtgeometrie angepaßte Rolle und Herstellung derselben aus einem elastischen Material, wird eine optimale Verbindung zwischen den Bauteilen erreicht. Das elastische Material der Rolle paßt sich zu Beginn des Verbindungsverfahrens der Nahtwurzel an, im späteren Verlauf des Verfahrens der Nahtgeometrie. Durch die Verformung der Rolle kann auch eine Nahtbegrenzung vorgegeben werden, wodurch eine weitere Nachbearbeitung der entstandenen Verbindung entfällt.Due to the advantageous design of the coating device as a roll adapted to the seam geometry and the production of the same from an elastic material, an optimal connection between the components is achieved. The elastic material of the roll adapts to the seam root at the beginning of the joining process, later in the process of the seam geometry. Due to the deformation of the roll, a seam limit can also be specified, which means that further processing of the resulting connection is not necessary.

Gemäß einem weiteren vorteilhaften Merkmal der Erfindung, dem Einsatz von abrasiven Materialien als Rollenmaterial in Verbindung mit der Rotationsbewegung der Rolle, wird erreicht, daß die zu verbindenden Oberflächen mechanisch aktiviert werden.According to a further advantageous feature of the invention, the use of abrasive materials as the roll material in connection with the rotational movement of the roll, it is achieved that the surfaces to be connected are mechanically activated.

Gemäß einer vorteilhaften Ausgestaltung nach Anspruch 9 weist die Beschichtungsvorrichtung in ihrer Achslagerung einen Meßwertgeber, vorzugsweise einen Druckgeber auf. Durch den Vergleich zwischen dem tatsächlichen Anpreßdruck und dem vorgegebenen Sollwert kann der Anpreßdruck der Rolle geregelt werden.According to an advantageous embodiment according to claim 9, the coating device has in its axle bearing a sensor, preferably a pressure sensor. The contact pressure of the roll can be regulated by comparing the actual contact pressure with the specified target value.

Das Merkmal des Versehens der Anode mit einer Isolationsbeschichtung an den Stellen, von denen aus kein Stromfluß erfolgen soll, ermöglicht vorteilhafterweise die Durchführung einer geometrisch kontrollierten Abscheidung unter Vermeidung von unerwünschtem Flankenaufbau.The feature of providing the anode with an insulation coating at the points from which no current flow is to take place advantageously enables a geometrically controlled deposition to be carried out while avoiding undesirable flank build-up.

In den nachfolgenden Zeichnungen wird die Erfindung anhand eines Ausführungsbeispieles dargestellt. Es zeigen:

Fig. 1
Eine schematische Darstellung des Verfahrens zu Beginn des Verbindungsprozesses und während des Verbindungsprozesses.
Fig. 2
Eine schematische Darstellung des Verfahrens während des Verbindungsprozesses.
The invention is illustrated in the following drawings using an exemplary embodiment. Show it:
Fig. 1
A schematic representation of the method at the beginning of the connection process and during the connection process.
Fig. 2
A schematic representation of the process during the connection process.

Die zu verbindenden Werkstoffe A und B berühren sich zu Anfang des Verfahrens an einem Punkt C. In den Verbindungsbereich wird eine Rolle 1 gebracht, die um ihre Achse 2, welche gleichzeitig ihre Symmetrieachse ist, rotiert. Die Achse 2 ist in Richtung des Pfeiles 3 verschiebbar. Zu Beginn des Verbindungsverfahrens ist die Rolle 1 in dem Verbindungsbereich nahe des Berührungspunktes C der beiden zu verbindenden Werkstoffe A und B herangefahren. Die Rolle 1 besteht aus einem elastischen Material, und sie weist eine in ihr integrierte Anode 4 auf. In den Bereichen, von denen aus kein Stromfluß erfolgen soll, ist die Anode 4 mit einem Isolator 6 beschichtet. Wird der Anode 4 Strom zugeführt, so beginnt der Abscheidungsprozeß. Der abgeschiedene Werkstoff sammelt sich zunächst in der nächsten Umgebung des Punktes C (Fig.1). Im Verlauf des Verfahrens wird die Rolle 1 aus dem Verbindungsbereich herausgefahren (Fig. 2). In diesem Stadium des Verfahrens ist der Anpreßdruck auch kleiner als zu Beginn des Verbindungsverfahrens. Bei der teilweise aufgebauten Naht 5 folgt das elastische Rollenmaterial der Rolle 1 der Nahtgeometrie. Wie Fig. 2 zeigt, wird der Radius R der Rolle 1 im Verlauf des Verfahrens größer. Ist die Breite der aufbauenden Naht 5 breiter als die Rollenbreite, kann durch eine geradlinige oder pendelnde Bewegung (Pfeil 7) der Rolle 1 quer zur Naht 5 die gesamte Breite gleichmäßig aufgebaut werden.The materials A and B to be joined touch at the beginning of the method at a point C. A roller 1 is brought into the connection area, which rotates about its axis 2, which is also its axis of symmetry. The axis 2 can be moved in the direction of the arrow 3. At the beginning of the joining process, the roller 1 has moved up in the joining area near the point of contact C of the two materials A and B to be joined. The roller 1 is made of an elastic material and it has an anode 4 integrated in it. In the areas from which no current should flow, the anode 4 is coated with an insulator 6. If current is supplied to the anode 4, the deposition process begins. The deposited material initially collects in the immediate vicinity of point C (Fig. 1). In the course of the method, the roller 1 is moved out of the connection area (FIG. 2). At this stage of the process, the contact pressure is also lower than at the start of the connection process. In the partially constructed seam 5, the elastic roll material of the roll 1 follows the seam geometry. As FIG. 2 shows, the radius R of the roller 1 increases in the course of the process. If the width of the building seam 5 is wider than the roll width, the entire width can be built up evenly by a straight or oscillating movement (arrow 7) of the roll 1 transverse to the seam 5.

Claims (10)

Galvanotechnisches Verfahren zur Herstellung einer metallischen Verbindung zwischen zwei Metalloberflächen, dadurch gekennzeichnet, daß die Elektrolytflüssigkeit durch eine rotierende, galvanische Beschichtungsvorrichtung (1) mit integrierter Anode (4) in den Verbindungsbereich und auf die zu verbindenden Oberflächen (A, B) aufgebracht wird.Electroplating process for producing a metallic connection between two metal surfaces, characterized in that the electrolyte liquid is applied by a rotating, galvanic coating device (1) with an integrated anode (4) into the connection area and onto the surfaces (A, B) to be connected. Galvanotechnisches Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß eine kontinuierliche Naht hergestellt wird.Electroplating process according to Claim 1, characterized in that a continuous seam is produced. Galvanotechnisches Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Nahtstärke durch die Wahl der Parameter Zeit, Stromstärke und Anpreßdruck der Beschichtungsvorrichtung (1) bestimmbar ist.Electroplating method according to Claim 2, characterized in that the seam thickness can be determined by the choice of the parameters time, current strength and contact pressure of the coating device (1). Galvanotechnisches Fügeverfahren nach Anspruch 3, dadurch gekennzeichnet, daß als Elektrolyt Nickel, Kupfer und/oder Bronze eingesetzt werden.Electroplating joining method according to claim 3, characterized in that nickel, copper and / or bronze are used as the electrolyte. Galvanotechnisches Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß der Anpreßdruck bei abrasiven Materialien der Beschichtungsvorrichtung (1) zu Beginn der Beschichtung größer ist und mit zunehmender Nahtstärke während des Verbindungsprozesses abnimmt.Electroplating method according to Claim 4, characterized in that the contact pressure in the case of abrasive materials of the coating device (1) is greater at the beginning of the coating and decreases with increasing seam strength during the connection process. Vorrichtung zur Durchführung des Verfahrens nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß die Beschichtungsvorrichtung eine in ihrer Form der Nahtgeometrie angepaßte Rolle (1) ist und aus elastischem Material besteht.Device for carrying out the method according to claims 1 to 5, characterized in that the coating device is a roller (1) adapted in shape to the seam geometry and consists of elastic material. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Rolle (1) aus abrasiv wirkenden Materialien hergestellt ist.Device according to claim 6, characterized in that the roller (1) is made of abrasive materials. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß das Material der Rolle (1) Glasfaser sind.Device according to claim 7, characterized in that the material of the roll (1) is glass fiber. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß in der Rolle (1) ein Meßwertgeber, vorzugsweise Druckgeber in der Lagerung der Rollenachse (2) angeordnet ist.Apparatus according to claim 6, characterized in that a measuring transducer, preferably a pressure transducer, is arranged in the bearing of the roller axis (2) in the roller (1). Vorrichtung nach einem oder mehreren der vorangegangenen Ansprüche 6 bis 9, dadurch gekennzeichnet, daß die Anode (4) in Bereichen, von denen aus kein Stromfluß erfolgen soll, mit einem Isolator (6) beschichtet ist.Device according to one or more of the preceding claims 6 to 9, characterized in that the anode (4) is coated with an insulator (6) in areas from which no current should flow.
EP90122577A 1989-12-13 1990-11-27 Process and apparatus for electrolytic welding Withdrawn EP0432559A1 (en)

Applications Claiming Priority (2)

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DE3941128A DE3941128C1 (en) 1989-12-13 1989-12-13
DE3941128 1989-12-13

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EP0432559A1 true EP0432559A1 (en) 1991-06-19

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EP90122577A Withdrawn EP0432559A1 (en) 1989-12-13 1990-11-27 Process and apparatus for electrolytic welding

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EP (1) EP0432559A1 (en)
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DE (1) DE3941128C1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603593A (en) * 1952-07-15 Electeodepositiqn of metaiis
US4655881A (en) * 1985-04-26 1987-04-07 Electroplating Engineers Of Japan, Limited Brush plating method for connector terminals

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2569368A (en) * 1946-01-08 1951-09-25 Champion Paper & Fibre Co Joining metal parts
US3671406A (en) * 1970-06-22 1972-06-20 Budd Co Method of joining dissimilar metals by plating
US3706650A (en) * 1971-03-26 1972-12-19 Norton Co Contour activating device
US4140598A (en) * 1976-06-03 1979-02-20 Hitachi Shipbuilding & Engineering Co., Ltd. Mirror finishing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603593A (en) * 1952-07-15 Electeodepositiqn of metaiis
US4655881A (en) * 1985-04-26 1987-04-07 Electroplating Engineers Of Japan, Limited Brush plating method for connector terminals

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JP2549763B2 (en) 1996-10-30
JPH03221291A (en) 1991-09-30
US5248404A (en) 1993-09-28
DE3941128C1 (en) 1990-12-06

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