EP0427900A1 - Process for joining the shaft and the basket of an electroplating apparatus - Google Patents

Process for joining the shaft and the basket of an electroplating apparatus Download PDF

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Publication number
EP0427900A1
EP0427900A1 EP89810793A EP89810793A EP0427900A1 EP 0427900 A1 EP0427900 A1 EP 0427900A1 EP 89810793 A EP89810793 A EP 89810793A EP 89810793 A EP89810793 A EP 89810793A EP 0427900 A1 EP0427900 A1 EP 0427900A1
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EP
European Patent Office
Prior art keywords
basket
spacers
rod
assembly
electroplating apparatus
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.)
Ceased
Application number
EP89810793A
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German (de)
French (fr)
Inventor
Jean-Marc Barbier
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.)
Riobeer AG
Original Assignee
Elga SA
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
Application filed by Elga SA filed Critical Elga SA
Priority to EP89810793A priority Critical patent/EP0427900A1/en
Publication of EP0427900A1 publication Critical patent/EP0427900A1/en
Ceased 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
    • C25D17/16—Apparatus for electrolytic coating of small objects in bulk
    • C25D17/22—Apparatus for electrolytic coating of small objects in bulk having open containers

Definitions

  • the present invention relates to a method of assembling the rod and the basket of an electroplating apparatus, also called a vibrator, as well as the apparatus obtained by this method.
  • the first drawback comes from the manufacturing method, which is relatively complex at first and which, above all, considerably increases repair costs. Indeed, if disorders or deteriorations appear, such as loss of tightness or break in contact for example, the user has no choice but to replace the basket and rod assembly.
  • the present invention aims to eliminate the two types of disadvantages exposed.
  • claim 1 make it possible, on the one hand, to manufacture substantially less expensive and, on the other hand, in the event of repair, to limit the replacement of the part to the single element which is the seat of possible deterioration.
  • the rod directly fulfills, in addition to its normal support function, that of conductor of the cathode current, which gives a double advantage: first, the problems of contact are almost eliminated, then correlatively, cathode currents of substantially higher intensities can be used.
  • Fig. 1 shows the structure formed by the rod 2 and the spacers 4 arranged in the lower zone thereof (the upper part of the rod being connected to the vibrator).
  • the four spacers, fulfilling the function of cathode current conductor but also of supporting the bottom of the basket 3 (fig. 3) or helical ramp known per se are, because of this second function , offset in the vertical plane.
  • the rod 2 is a cylinder of solid metal, preferably aluminum.
  • its weight can be reduced by providing radial perforations 5.
  • Fig. 2 shows in cross section a spacer 4, provided with its tenon 16.
  • the spacer has three perforations 12,13 whose axes 23 are mutually parallel and perpendicular to the longitudinal axis 24. These perforations are formed , on the one hand a tapped hole 12 over about a half-depth of the thickness of the spacer and a countersunk base 14 and, on the other hand, a tapped hole 13 on the remaining thickness , of diameter smaller than that of the internal thread 12, and of a countersunk base 15.
  • two bores right through 17, whose axis, passing through the axis 24, is orthogonal to the axes 23, make it possible to favor the passage and stirring of the electrolytic bath in which the basket is immersed during parts processing operations.
  • basket 3 forming it constitutes the second phase of the process.
  • the bottom or ramp 7, provided with a central opening 10, is welded inside the envelope or flange 9, on the entire outer perimeter 11.
  • the third phase consists in assembling the two sub-assemblies, that is to say the rod 2 / spacers 4 structure and the basket 3, to form a set 1.
  • This phase can be preceded by an intermediate phase consisting of plasticizing the structure for example by immersion.
  • the basket 3 is then introduced from the top of the rod 2 through the central opening 10, until it comes to rest on the spacers.
  • the ramp has, in accordance with the tapped holes 12,13 of the spacers, holes 8.
  • the assembly is assembled by means of cathode screws 19 made of oxidizable metal with hollow threaded rods into which threads engage plastic screws 20.
  • the spacers have four sets of perforations 12,13 instead of three as described in fig. 2. It is clear that the number of perforations in the spacers depends on the length of these, that is to say also on the type of basket and device used.
  • the rod is advantageously not a tube inside rieur which passes the cathode current transport wires, but on the contrary a solid metal cylinder, preferably aluminum.
  • the contact wire spacers which are often the seat of contact breakages, are thus replaced by the direct connection rod 2 / spacers 4, the cathode current being brought by the rod 2.
  • the assembly method according to the invention provides, in addition to the economy of manufacture and use, better reliability, while allowing the transport of currents of intensities of the order of 100 amperes, at 1 'pours known devices whose amperage of the cathode current is in fact limited to intensities of the order of about 10 amps.

Abstract

The shaft (2) and the spacers (4) form a first structure, the spacers being driven into the shaft. Independently of the formation of this structure the formation of the basket is performed by assembling the rack (7) with the small collar (9). The basket (3) is then introduced into the structure which is plasticised beforehand. The rack is fastened to the spacers by means of cathodic screws. The invention is also characterised by a shaft (2) made up of a solid aluminium cylinder, with bores (5). <IMAGE>

Description

La présente invention a pour objet un procédé d'assemb­lage de la tige et du panier d'un appareil de galvano­plastie, appelé encore vibreur, ainsi que l'appareil obtenu par ce procédé.The present invention relates to a method of assembling the rod and the basket of an electroplating apparatus, also called a vibrator, as well as the apparatus obtained by this method.

On sait que les appareils de galvanoplastie sont utili­sés pour le traitement électrolytique de pièces métalli­ques. La tige et le panier d'un tel appareil sont reliés entre eux par des entretoises. Dans les appareils con­nus, les entretoises, en laiton, sont soudées sur la tige, constituée elle-même d'un tube en aluminium dans lequel passent les fils de courant cathodique connectés aux entretoises. Les entretoises sont recouvertes de plastique; le panier, constitué d'une enveloppe et d'un fond en forme de rampe hélicoïdale, en polypropylène, est soudé autour des entretoises. On obtient ainsi un ensemble monolithique qui présente deux sortes d'incon­vénients.We know that electroplating devices are used for the electrolytic treatment of metal parts. The rod and the basket of such an apparatus are interconnected by spacers. In known devices, the brass spacers are welded to the rod, itself made up of an aluminum tube through which the cathode current wires connected to the spacers pass. The spacers are covered with plastic; the basket, consisting of an envelope and a bottom in the form of a helical ramp, made of polypropylene, is welded around the spacers. A monolithic assembly is thus obtained which has two kinds of drawbacks.

Le premier inconvénient provient du mode de fabrication, relativement complexe d'abord et qui, surtout, renchérit considérablement les coûts de réparation. En effet, si des désordres ou des détériorations apparaisent, telles que perte d'étanchéité ou rupture de contact par exemp­le, l'utilisateur n'a d'autre choix que de remplacer l'ensemble panier et tige.The first drawback comes from the manufacturing method, which is relatively complex at first and which, above all, considerably increases repair costs. Indeed, if disorders or deteriorations appear, such as loss of tightness or break in contact for example, the user has no choice but to replace the basket and rod assembly.

On comprend que la qualité du contact cathodique, c'est-­à-dire sa fiabilité, doit par ailleurs être préservée au maximum, d'autant que le panier est soumis à des solli­citations dynamiques. Le problème du contact cathodique constitue le second inconvénient.It is understood that the quality of the cathodic contact, that is to say its reliability, must moreover be preserved as much as possible, especially as the basket is subjected to dynamic stresses. The second drawback is the problem of cathodic contact.

La présente invention a pour objectif d'écarter les deux types d'inconvénients exposés.The present invention aims to eliminate the two types of disadvantages exposed.

Ce but est atteint, grâce d'une part à un procédé d'as­semblage selon la revendication 1 et, d'autre part, à l'utilisation d'une tige selon la revendication 9.This object is achieved, thanks on the one hand to an assembly method according to claim 1 and, on the other hand, to the use of a rod according to claim 9.

Les caractéristiques de la revendication 1 permettent d'une part, une fabrication sensiblement moins coûteuse et d'autre part, en cas de réparation, de limiter le remplacement de pièce au seul élément qui est le siège d'une détérioration éventuelle.The features of claim 1 make it possible, on the one hand, to manufacture substantially less expensive and, on the other hand, in the event of repair, to limit the replacement of the part to the single element which is the seat of possible deterioration.

Par la revendication 9, on voit que la tige remplit di­rectement, en plus de sa fonction normale de support, celle de conducteur du courant cathodique, ce qui procu­re un double avantage: d'abord, les problèmes de contact sont quasiment écartés, ensuite et corrélativement, des courants cathodiques d'intensités sensiblement supérieu­res peuvent être utilisés.By claim 9, it can be seen that the rod directly fulfills, in addition to its normal support function, that of conductor of the cathode current, which gives a double advantage: first, the problems of contact are almost eliminated, then correlatively, cathode currents of substantially higher intensities can be used.

L'invention va être décrite ci-après en détail, à titre d'exemple, à l'aide du dessin annexé dans lequel

  • la fig. 1 est un schéma de la structure tige/entretoises,
  • la fig. 2 représente en coupe une entretoise, et
  • la fig. 3 est un schéma du montage structure/panier.
The invention will be described below in detail, by way of example, using the attached drawing in which
  • fig. 1 is a diagram of the rod / spacer structure,
  • fig. 2 represents in cross section a spacer, and
  • fig. 3 is a diagram of the structure / basket assembly.

La fig. 1 représente la structure formée par la tige 2 et les entretoises 4 agencées dans la zone inférieure de celle-ci (la partie supérieure de la tige étant reliée au vibreur). Les entretoises 4, au nombre de quatre dans l'exemple, de forme parallélépipédique et de section approximativement carrée, présentent chacune sur un de leur côté, dans le prolongement de l'axe longitudinal 24, un tenon 16 (fig. 2) qui est chassé radialement dans un trou borgne 6 correspondant de la tige 2. Les quatre entretoises, remplissant la fonction de conducteur de courant cathodique mais aussi de support du fond du panier 3 (fig. 3) ou rampe hélicoïdale connue en soi sont, du fait de cette seconde fonction, decalées dans le plan vertical.Fig. 1 shows the structure formed by the rod 2 and the spacers 4 arranged in the lower zone thereof (the upper part of the rod being connected to the vibrator). The spacers 4, four in number in the example, of parallelepiped shape and approximately square section, each have on one of their side, in the extension of the longitudinal axis 24, a tenon 16 (fig. 2) which is driven radially in a corresponding blind hole 6 of the rod 2. The four spacers, fulfilling the function of cathode current conductor but also of supporting the bottom of the basket 3 (fig. 3) or helical ramp known per se are, because of this second function , offset in the vertical plane.

Comme on le verra plus loin, la tige 2 est un cylindre du métal plein, de préférence en aluminium. Dans une variante, son poids peut être allégé en y ménageant des perforations radiales 5.As will be seen below, the rod 2 is a cylinder of solid metal, preferably aluminum. In a variant, its weight can be reduced by providing radial perforations 5.

La fig. 2 montre en coupe une entretoise 4, pourvue de son tenon 16. Dans l'exemple décrit, l'entretoise présente trois perforations 12,13 dont les axes 23 sont parallèles entre eux et perpendiculaires à l'axe longi­tudinal 24. Ces perforations sont constituées, d'une part d'un trou taraudé 12 sur environ une demi-profon­deur de l'épaisseur de l'entretoise et d'une embase fraisée 14 et, d'autre part, d'un trou taraudé 13 sur l'épaisseur restante, de diamètre inférieur à celui du taraudage 12, et d'une embase fraisée 15. Enfin, deux alésages de part en part 17, dont l'axe, passant par l'axe 24, est orthogonal aux axes 23, permettent de favoriser le passage et le brassage du bain électroly­thique dans lequel le panier est plongé lors des opéra­tions de traitement des pièces.Fig. 2 shows in cross section a spacer 4, provided with its tenon 16. In the example described, the spacer has three perforations 12,13 whose axes 23 are mutually parallel and perpendicular to the longitudinal axis 24. These perforations are formed , on the one hand a tapped hole 12 over about a half-depth of the thickness of the spacer and a countersunk base 14 and, on the other hand, a tapped hole 13 on the remaining thickness , of diameter smaller than that of the internal thread 12, and of a countersunk base 15. Finally, two bores right through 17, whose axis, passing through the axis 24, is orthogonal to the axes 23, make it possible to favor the passage and stirring of the electrolytic bath in which the basket is immersed during parts processing operations.

L'opération de chassage des entretoises 4 sur la tige 2 forme la première phase du procédé d'assemblage selon l'invention. Cette phase est suivie de deux autres, qui seront exposées à l'appui de la fig. 3.The operation of driving out the spacers 4 on the rod 2 forms the first phase of the assembly process according to the invention. This phase is followed by two others, which will be explained in support of FIG. 3.

On apperçoit à la fig. 3 le panier 3: la formation de celui-ci constitue la deuxième phase du procédé. Le fond ou rampe 7, pourvu d'une ouverture centrale 10, est soudé à l'intérieur de l'enveloppe ou collerette 9, sur tout le périmètre extérieur 11.We can see in fig. 3 basket 3: forming it constitutes the second phase of the process. The bottom or ramp 7, provided with a central opening 10, is welded inside the envelope or flange 9, on the entire outer perimeter 11.

La troisième phase consiste à assembler les deux sous-­ensembles, c'est-à-dire la structure tige 2/entretoises 4 et le panier 3, pour former un ensemble 1. Cette phase peut être précédée d'une phase intermédiaire consistant à plastifier la structure par exemple par immersion.The third phase consists in assembling the two sub-assemblies, that is to say the rod 2 / spacers 4 structure and the basket 3, to form a set 1. This phase can be preceded by an intermediate phase consisting of plasticizing the structure for example by immersion.

Le panier 3 est alors introduit par le haut de la tige 2 à travers l'ouverture central 10, jusqu'à ce qu'il vien­ne reposer sur les entretoises. La rampe présente, en concordance avec les trous taraudés 12,13 des entretoi­ses, des trous 8. Lorsque ces trous 8 sont bien placés en face des taraudages 12,13 respectifs, l'ensemble est assemblé au moyen de vis cathodiques 19 en métal oxydab­le à tiges creuses taraudées dans lesquels taraudages viennent s'engager des vis 20 en plastique. On remarque sur la figure 3 que les entretoises présentent quatre séries de perforations 12,13 au lieu de trois comme dé­crit dans la fig. 2. Il est clair que le nombre de per­forations dans les entretoises est fonction de la lon­gueur de celles-ci, c'est-à-dire aussi du type de pa­nier et d'appareil utilisé.The basket 3 is then introduced from the top of the rod 2 through the central opening 10, until it comes to rest on the spacers. The ramp has, in accordance with the tapped holes 12,13 of the spacers, holes 8. When these holes 8 are well placed opposite the respective tapping 12,13, the assembly is assembled by means of cathode screws 19 made of oxidizable metal with hollow threaded rods into which threads engage plastic screws 20. Note in Figure 3 that the spacers have four sets of perforations 12,13 instead of three as described in fig. 2. It is clear that the number of perforations in the spacers depends on the length of these, that is to say also on the type of basket and device used.

L'étanchéité entre l'électrolyte et les entretoises est assurée chaque fois au moyen de joints toriques 21,22 et 25. Enfin, l'espace 18 pouvant éventuellement subsister entre l'ouverture centrale 10 du fond 7 et la tige 2 peut être obturée par une soudure legère, c'est-à-dire facilement cassable.The seal between the electrolyte and the spacers is ensured each time by means of O-rings 21, 22 and 25. Finally, the space 18 which may possibly remain between the central opening 10 of the bottom 7 and the rod 2 can be closed. by a light weld, that is to say easily breakable.

On comprend que l'ensemble peut, en cas de besoin, être aisément démonté. Il suffira de couper la soudure 18 puis de dévisser les vis 19, 20 pour séparer le panier de la structure.It is understood that the assembly can, if necessary, be easily disassembled. It will suffice to cut the weld 18 and then unscrew the screws 19, 20 to separate the basket from the structure.

La tige est avantageusement non pas un tube à l'inté­ rieur duquel passe les fils de transport de courant cathodique, mais au contraire un cylindre métallique plein, de préférence en aluminium. Les contacts fils entretoises, qui sont souvent le siège de ruptures de contact, sont ainsi remplacés par la liaison directe tige 2/entretoises 4, le courant cathodique étant amené par la tige 2.The rod is advantageously not a tube inside rieur which passes the cathode current transport wires, but on the contrary a solid metal cylinder, preferably aluminum. The contact wire spacers, which are often the seat of contact breakages, are thus replaced by the direct connection rod 2 / spacers 4, the cathode current being brought by the rod 2.

Ainsi, le procédé d'assemblage selon l'invention procu­re, en plus de l'économie de fabrication et d'utilisa­tion, une meilleure fiabilité, tout en permettant des transports de courants d'intensités de l'ordre de 100 ampères, à l'enverse des appareils connus dont l'ampé­rage du courant cathodique est en fait limité à des in­tensités de l'ordre de 10 ampères environ.Thus, the assembly method according to the invention provides, in addition to the economy of manufacture and use, better reliability, while allowing the transport of currents of intensities of the order of 100 amperes, at 1 'pours known devices whose amperage of the cathode current is in fact limited to intensities of the order of about 10 amps.

Claims (10)

1. Procédé d'assemblage de la tige et du panier d'un appareil de galvanoplastie, caractérisé en ce que a) des entretoises (4) sont chassées radialement sur la tige (2) dans la zone inférieure de celle-ci, pour former une structure (1), b) le panier (3) est formé par l'assemblage d'un fond (7) pourvu d'une ouverture centrale (10), avec une enveloppe ou collerette (9), c) la structure est assemblée avec le panier (3) au moyen d'éléments de fixation reliant le fond (7) aux entretoises (4), après avoir fait passer la tige par l'ouverture centrale (10) du fond jusqu'à ce que ce dernier vienne s'appuyer sur les entretoises. 1. A method of assembling the rod and the basket of an electroplating apparatus, characterized in that a) spacers (4) are driven radially on the rod (2) in the lower zone thereof, to form a structure (1), b) the basket (3) is formed by assembling a bottom (7) provided with a central opening (10), with an envelope or flange (9), c) the structure is assembled with the basket (3) by means of fixing elements connecting the bottom (7) to the spacers (4), after having passed the rod through the central opening (10) from the bottom to that the latter comes to rest on the spacers. 2. Procédé d'assemblage selon la revendication 1, caractérisé en ce que l'assemblage du panier avec le fond est obtenu par soudure.2. The assembly method according to claim 1, characterized in that the assembly of the basket with the bottom is obtained by welding. 3. Procédé d'assemblage selon la revendication 1 ou 2. caractérisé en ce que les éléments d'assemblage sont des vis de contact (19, 20), le fond et les entretoises pré­sentant des trous pour le passage desdites vis.3. The assembly method according to claim 1 or 2. characterized in that the assembly elements are contact screws (19, 20), the bottom and the spacers having holes for the passage of said screws. 4. Procédé d'assemblage selon l'une des revendications 1 à 3, caractérisé en ce que la structure est soumise à un revêtement anti-corrosif et isolant préalablement à son assemblage avec le panier.4. Assembly method according to one of claims 1 to 3, characterized in that the structure is subjected to an anti-corrosion and insulating coating prior to its assembly with the basket. 5. Procédé d'assemblage selon l'une des revendications 1 à 4, caractérisé par le fait que des moyens d'étan­chéité sont rapportés entre la tige (2) et les bords supérieur et inférieur de l'ouverture centrale (10) du panier.5. Assembly method according to one of claims 1 to 4, characterized in that sealing means are attached between the rod (2) and the upper and lower edges of the central opening (10) of the basket . 6. Procédé d'assemblage selon la revendication 5, caractérisé en ce que les moyens d'étanchéité consistent en une soudure mince.6. The assembly method according to claim 5, characterized in that the sealing means consist of a thin weld. 7. Procédé d'assemblage selon l'une des revendications 1 à 6, caractérisé en ce que des joints d'étanchéité (21,22,25) sont prévus entre les moyens (19,20) et le fond (7) d'une part, et entre ces mêmes moyens de fixa­tion et les entretoises d'autre part.7. Assembly method according to one of claims 1 to 6, characterized in that seals (21,22,25) are provided between the means (19,20) and the bottom (7) of on the one hand, and between these same fixing means and the spacers on the other hand. 8. Appareil de galvanoplastie obtenu par le procédé d'assemblage selon l'une des revendications 1 à 7.8. Electroplating apparatus obtained by the assembly process according to one of claims 1 to 7. 9. Appareil de galvanoplastie selon la revendication 8, caractérisé en ce que la tige (2) est une pièce métalli­que massive, pourvue ou non de perforations radiales (5).9. Electroplating apparatus according to claim 8, characterized in that the rod (2) is a solid metal part, whether or not provided with radial perforations (5). 10. Appareil de galvanoplastie selon la revendication 9, caractérisé en ce que le métal est l'aluminium.10. Electroplating apparatus according to claim 9, characterized in that the metal is aluminum.
EP89810793A 1989-10-23 1989-10-23 Process for joining the shaft and the basket of an electroplating apparatus Ceased EP0427900A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP89810793A EP0427900A1 (en) 1989-10-23 1989-10-23 Process for joining the shaft and the basket of an electroplating apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89810793A EP0427900A1 (en) 1989-10-23 1989-10-23 Process for joining the shaft and the basket of an electroplating apparatus

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EP0427900A1 true EP0427900A1 (en) 1991-05-22

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH320335A (en) * 1952-07-02 1957-03-31 Pietro Philippe De Electrolytic deposition process and device for implementing this process
US3397126A (en) * 1965-10-14 1968-08-13 Sel Rex Corp Plating of small parts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH320335A (en) * 1952-07-02 1957-03-31 Pietro Philippe De Electrolytic deposition process and device for implementing this process
US3397126A (en) * 1965-10-14 1968-08-13 Sel Rex Corp Plating of small parts

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED, week 8511, 24th April 1985, section CH, no. 85-067235/11, Derwent Publications Ltd, London, GB; & SU-A-1 108 141 (A.A. VYALTSEV) 15-08-1984 *

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