EP0538113B1 - Current conducting rolls for electroplating installations - Google Patents

Current conducting rolls for electroplating installations Download PDF

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Publication number
EP0538113B1
EP0538113B1 EP92402792A EP92402792A EP0538113B1 EP 0538113 B1 EP0538113 B1 EP 0538113B1 EP 92402792 A EP92402792 A EP 92402792A EP 92402792 A EP92402792 A EP 92402792A EP 0538113 B1 EP0538113 B1 EP 0538113B1
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EP
European Patent Office
Prior art keywords
current
fact
roller according
conducting roller
internal
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EP92402792A
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German (de)
French (fr)
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EP0538113A1 (en
Inventor
Claude Jacques
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Polimiroir
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Polimiroir
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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
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/06—Wires; Strips; Foils
    • C25D7/0614—Strips or foils
    • C25D7/0657—Conducting rolls

Definitions

  • the present invention relates to the field of current conducting rollers, in particular but not exclusively rollers for continuous electrolysis lines.
  • the aim of the present invention is to improve the current conducting rollers described in the document FR-A-2648269.
  • FIG. 1 Partially shown in attached FIG. 1 is a current conducting roller of the type described in this document FR-A-2648269.
  • Figure 1 attached is in accordance with Figure 3 of document FR-A-2648269.
  • the rollers 100 described in document FR-A-2648269 comprise a central part 110 partially visible in the attached FIG. 1.
  • This central part 110 is cylindrical of revolution around the axis 102 of the roller. It constitutes the main active part of the roll involved in electrolysis.
  • This central part 110 is generally called “table" of the roller.
  • This central part 110 is extended on both sides, at its axial ends, by pins 120 centered on the axis 102.
  • Document FR-A-2648269 essentially relates to the structure of these pins 120.
  • These pins 120 have a diameter smaller than that of the central part 110. They essentially fulfill a double function: guiding the roller 100 in rotation around the axis 102 on the one hand, and ensuring the supply of current to the roller 100 'somewhere else.
  • rollers 100 are crossed by an axial channel 130 allowing circulation of cooling water.
  • Cooling of the roller must be ensured in particular at the level of the collector zone formed on the pins 120.
  • the journals 120 each comprise a steel body 140, of revolution about the axis 102.
  • the body 140 is welded, at its axially internal end, at 142, on a sleeve in steel 112 centered on the axis 102 forming the central part 110 of the roller.
  • the body 140 is also welded at its axially external end to an attached end piece 180.
  • the body 140 of steel is provided with an internal copper hoop 150.
  • the internal copper hoop 150 is itself protected by a sheath 160 complementary to the internal surface of the copper hoops 150.
  • the sheath 160 is preferably made of stainless steel.
  • the protection of each internal copper hoop 150 is completed by two washers 162, 164, arranged transversely to the axis 102.
  • the washers 162, 164 respectively cover each of the axial ends of the hoops 150. They are welded at their periphery internal on the sleeve 160 and at their external periphery on the steel body 140.
  • the sleeve 160 in combination with the washers 162, 164, prevents corrosion of the internal copper hoops 150.
  • the object of the present invention is to improve the conductive rollers described in the document FR-A-2648269 and shown in FIG. 1 attached.
  • An important object of the present invention is to adapt the current conducting roller to the use of water boxes.
  • Another important object of the present invention is to strengthen the rigidity of the current conducting rollers.
  • the current conducting roller comprises a central part constituting the main active part of the roller and two pins extending the central part, respectively at each of its ends, each of the pins comprising a steel body provided with an internal copper hoop itself provided with an internal protective sheath and this current conducting roller is characterized in that the internal copper hoop is placed in a blind bore of the steel body and that there is provided a compressible seal inserted between the bottom of the blind bore and the corresponding end of the internal copper hoop.
  • the compressible seal is capable of radial expansion during compression.
  • the steel body is provided with at least one generally radial through bore, axially outside the copper hoop.
  • the steel body of each pin is in one piece.
  • roller 200 conducting current comprising a central part 210 extended respectively, at its ends, by two pins 220.
  • the central part 210 of the roller is formed of a cylindrical steel sleeve 212 of revolution about an axis 202. If necessary, the central part 210 can be provided with a coating 214, for example a copper coating deposited by plating. This coating 214 is however not essential.
  • a single pin 220 is partially shown in FIG. 2.
  • the second pin provided at the opposite end of the central part 210 can be symmetrical with the latter shown in FIG. 2.
  • Each pin 220 preferably comprises, as shown in the appended FIG. 2: a steel body 240, an internal copper hoop 250, a protective sleeve 260, two washers 262, 264, and a compressible seal 270.
  • the steel body 240 is centered on the axis 202 of the roller.
  • the steel body 240 can be the subject of numerous embodiments. It preferably has a stepped section along its length. Essentially, the stepped section of the steel body 240 is of increasing size from the axial end of the journal 220 towards the central part 210.
  • the steel body 240 comprises an axially external part 241, an axially internal part 242 and a transition zone 243.
  • the axially external part 241 is formed by a succession of cylindrical portions centered on the axis 202 and of increasing section towards the central part 210.
  • the axially internal part 242 has a diameter greater than the axially external part 241.
  • the axially internal part 242 has an external radius equal to that of the sleeve 212. This axially internal part 242 is welded to the sleeve 212 of the central part using an annular weld bead 244.
  • the transition zone 243 diverges with respect to the axis 202 in approach to the axially internal part 242.
  • the axially internal part 242 can also be covered by the coating 214.
  • the steel body 240 more precisely the axially external part 241 thereof, is provided with an axial bore passing through 245 of radius R1.
  • This bore 245 forms in combination with the sheath 260 an axial through passage 230, as will be explained later.
  • the axially external part 241 of the steel body 240 is further provided with a second blind bore 246 of radius R2 greater than the radius R1 of the above-mentioned through bore 245.
  • the second blind bore 246 opens onto the axially internal end of the axially external part 241 of the steel body 240. This second bore 246 extends over most of the length of the part 241 of the steel body 240, typically the 75% of the length of this part 241.
  • the bottom 247 of the blind bore 246 is directed towards the inside of the roller. For this reason, the bore 246 must of course be produced in the steel body 240 before welding it on the central sleeve 212.
  • the axial bore 246 is designed to receive the internal copper hoop 250 as indicated in the document FR-A-2648269.
  • the external radius of the internal copper hoop 250 is adapted to the radius R2 of the bore 246.
  • the sleeve 260 is preferably made of stainless steel.
  • the sheath 260 is preferably assembled by hooping inside the copper hoop 250.
  • the sleeve 260 is intended to protect the copper hoop 250 from the cooling water circulating in the central channel 230 of the roller and from the chromic acid used, if necessary, for the repair of the roller.
  • the stainless steel sheath 260 has a length greater than the copper hoop 250 and emerges axially on each of the ends of the latter.
  • a third axial bore 248 having a radius R3 intermediate between the radius R1 of the through bore 245 and the radius R2 of the blind bore 246.
  • the radius R3 of this third axial bore 248 is substantially complementary to the external radius of the sleeve 260 of stainless steel.
  • the sleeve 260 has an equal internal radius R1 of the bore 245.
  • the sleeve 260 does not protrude inside the axial passage 230 and does not disturb the circulation of the cooling water.
  • the washer 262 and the washer 264 are preferably made of stainless steel.
  • the washer 262 is placed on the axially internal end of the copper hoop 250. To effectively protect the latter, the washer 262 is fixed, by its radially external periphery to the steel body 240 and by its radially internal periphery to the sheath 260 stainless steel.
  • the washer 264 is placed on the radially external end of the internal copper hoop 250. It is preferably welded by its radially internal periphery to the stainless steel sheath 260.
  • the washer 260 preferably has an external radius less than the radius R2 of the blind bore 246.
  • This arrangement is to allow the internal copper hoop 250 and the washer 264 to be assembled in the blind bore 246, while ensuring close contact between the external wall of the internal copper hoop 250 and the internal wall of the steel body 240 formed by the blind bore 246, despite the difference in coefficient of expansion between the copper making up the hoop 250 and the stainless steel making up the washer 264.
  • the seal 270 is preferably a seal designed to be subject to radial expansion when subjected to axial compression.
  • the seal 270 is adapted to the geometry of the bottom 247 of the bore 246.
  • FIG. 3 shows a first embodiment of a seal 270 adapted to a bottom 247 of flat bore and orthogonal to the axis 202.
  • the seal 270 shown in FIG. 3 essentially comprises a ring 271 provided with a first lip 272 directed generally radially inwards and axially inwards from the roller and with a second lip 273 directed generally radially outwards and axially towards the outside of the roller.
  • FIG. 4 shows a second alternative embodiment of a compressible seal 270 adapted to a bottom 247 of a bore of pyramidal cross section.
  • the seal 270 shown in FIG. 4 comprises an annular block 274 having an axially internal planar face 275 which rests on the axially external surface of the washer 264.
  • the annular block 274 has a radially internal cylindrical surface 276 of revolution around the axis 202 and generally complementary to the external surface of the sleeve 260.
  • the annular block 274 has a radially external surface 277 of radius less than the bore 246.
  • the annular block 274 is delimited by two facets 278, 279, axially external, inclined relative to the axis 202 to be generally parallel to the facets delimiting the bottom 247 of the bore 246.
  • These facets 278, 279 are provided with a plurality of annular lips 2790 designed to come to rest on the associated facets of the bottom 247 of bore 246.
  • the sheath 260 in stainless steel is assembled by hooping inside the internal copper hoop 250 (heating hoop 250 and cooling sheath 260).
  • the stainless steel washer 264 is engaged on the axially outer end of the sleeve 260 and welded to it.
  • the internal copper hoop 250 is then assembled by shrinking in the bore 246 of the steel body 240 (heating body 240 and cooling hoop 250). Thanks to its lower dimension, the washer 264 does not disturb this hooping assembly despite the difference in coefficient of thermal expansion between stainless steel and copper, and despite the close complementarity provided between the internal copper hoop 250 and the bore 246 (straightness and precise dimension of the outer surface of the hoop 250 and the bore 246, over a great length).
  • the seal 270 undergoes axial compression which causes a radial expansion of this seal capable of guaranteeing a good seal on the axially external end of the internal copper hoop 250.
  • the stainless steel washer 262 can then be placed on the axially internal end of the sleeve 260 and welded to the latter and to the steel body 240.
  • the steel body 240 is in one piece. It does not have a tip similar to the tip 180 above with reference to FIG. 1.
  • the mechanical resistance of the roller 200 is thus reinforced. This can withstand significant torsional forces, in particular when the rotation stops suddenly.
  • At least one of the two journals 220 is provided axially on the outside of the internal copper hoop 250 with at least one through bore 249 extending in a generally radial direction relative to the axis 202.
  • This bore is designed to open into a water box intended to recover the cooling water circulating in the central passage 230 of the roller.
  • a water box has been sketched in FIG. 2 under the reference 300. It can be the subject of numerous embodiments known to those skilled in the art and will therefore not be described in more detail below.
  • each journal 220 has at least two radial bores 249 opening into the water box 300.
  • radial bores 249 on only one of the two journals 220, namely that equipped with rotary drive means.
  • the coolant is introduced axially, through the central passage 230 into one of the pins, and exits at the level of the second pin through the radial passages 249, into the water box 300.
  • This silvering deposit can be formed either on the internal surface of the bore 246, or on the external surface of the hoop 250.
  • the external surface of the pin 240 is chrome-plated.
  • the external surface of the steel bodies 240 can be provided with bearing surfaces 290, 292 for seals associated with a bearing placed between these bearing surfaces.
  • the external surface of the steel bodies 240 can also be provided with a thread 280 intended to receive a nut used for tightening this bearing.
  • the bearing surfaces 290, 292 can be formed for example from chrome, or using a stainless steel ring, or even using a stainless steel ring coated with chromium oxide.
  • the threads 280 can be formed in the mass of the steel bodies 240.
  • the axial end of the steel bodies 240 is adapted in a manner known per se to receive the rotary drive means.
  • the end of the steel bodies 240 may be provided with a thread 2400, in the bore 245, and with an external thread 2402.
  • the 2400 internal thread is intended to receive a sealing plug.
  • the thread 2402 is intended to receive a tightening nut of the water box, and the drive means.
  • a manifold surface 294 can be formed between the thread 280 and the water box.
  • This collector surface 294 can be formed by depositing silver or copper by electrolysis for example.

Abstract

A current-conducting roller comprising a middle part forming the active main part (210) of the roller and two journals (220) extending the middle part, at each of the ends of the latter respectively, each of the journals (220) comprising a steel body (240) provided with an internal copper liner (250), itself provided with an internal protective sheath (260), characterised in that the internal copper liner (250) is placed in a blind bore (246) of the steel body (240) and that a compressible seal (270) is provided, inserted between the bottom (247) of the blind bore (246) and the corresponding end of the internal copper liner (250). <IMAGE>

Description

La présente invention concerne le domaine des rouleaux conducteurs de courant, notamment mais non exclusivement les rouleaux pour lignes d'électrolyse en continu.The present invention relates to the field of current conducting rollers, in particular but not exclusively rollers for continuous electrolysis lines.

La présente invention a pour but de perfectionner les rouleaux conducteurs de courant décrits dans le document FR-A-2648269.The aim of the present invention is to improve the current conducting rollers described in the document FR-A-2648269.

On a représenté partiellement sur la figure 1 annexée un rouleau conducteur de courant du type décrit dans ce document FR-A-2648269. La figure 1 annexée est conforme à la figure 3 du document FR-A-2648269.Partially shown in attached FIG. 1 is a current conducting roller of the type described in this document FR-A-2648269. Figure 1 attached is in accordance with Figure 3 of document FR-A-2648269.

Les rouleaux 100 décrits dans le document FR-A-2648269 comprennent une partie centrale 110 partiellement visible sur la figure 1 annexée. Cette partie centrale 110 est cylindrique de révolution autour de l'axe 102 du rouleau. Elle constitue la partie principale active du rouleau intervenant lors d'une électrolyse. Cette partie centrale 110 est appelée généralement "table" du rouleau.The rollers 100 described in document FR-A-2648269 comprise a central part 110 partially visible in the attached FIG. 1. This central part 110 is cylindrical of revolution around the axis 102 of the roller. It constitutes the main active part of the roll involved in electrolysis. This central part 110 is generally called "table" of the roller.

Cette partie centrale 110 est prolongée de part et d'autre, à ses extrémités axiales, par des tourillons 120 centrés sur l'axe 102. Le document FR-A-2648269 se rapporte essentiellement à la structure de ces tourillons 120.This central part 110 is extended on both sides, at its axial ends, by pins 120 centered on the axis 102. Document FR-A-2648269 essentially relates to the structure of these pins 120.

Ces tourillons 120 présentent un diamètre inférieur à celui de la partie centrale 110. Ils remplissent essentiellement une double fonction : guider le rouleau 100 en rotation autour de l'axe 102 d'une part, et assurer l'alimentation du rouleau 100 en courant d'autre part.These pins 120 have a diameter smaller than that of the central part 110. They essentially fulfill a double function: guiding the roller 100 in rotation around the axis 102 on the one hand, and ensuring the supply of current to the roller 100 'somewhere else.

On notera que les rouleaux 100 sont traversés par un canal axial 130 permettant une circulation d'eau de refroidissement.It will be noted that the rollers 100 are crossed by an axial channel 130 allowing circulation of cooling water.

Un refroidissement du rouleau doit être assuré tout particulièrement au niveau de la zone de collecteur formé sur les tourillons 120.Cooling of the roller must be ensured in particular at the level of the collector zone formed on the pins 120.

Plus précisément, selon le document FR-A-2648269 les tourillons 120 comprennent chacun un corps en acier 140, de révolution autour de l'axe 102. Le corps 140 est soudé, à son extrémité axialement interne, en 142, sur un manchon en acier 112 centré sur l'axe 102 formant la partie centrale 110 du rouleau.More specifically, according to document FR-A-2648269 the journals 120 each comprise a steel body 140, of revolution about the axis 102. The body 140 is welded, at its axially internal end, at 142, on a sleeve in steel 112 centered on the axis 102 forming the central part 110 of the roller.

Le corps 140 est également soudé à son extrémité axialement externe sur un embout 180 rapporté.The body 140 is also welded at its axially external end to an attached end piece 180.

Selon le document FR-A-2648269, pour permettre de passer l'ampérage requis, le corps 140 en acier est muni d'une frette interne en cuivre 150.According to document FR-A-2648269, to allow the required amperage to pass, the body 140 of steel is provided with an internal copper hoop 150.

La frette interne en cuivre 150 est elle-même protégée par un fourreau 160 complémentaire de la surface interne des frettes en cuivre 150. Le fourreau 160 est de préférence en acier inoxydable. La protection de chaque frette interne en cuivre 150 est complétée par deux rondelles 162, 164, disposées transversalement à l'axe 102. Les rondelles 162, 164, recouvrent respectivement chacune des extrémités axiales des frettes 150. Elles sont soudées au niveau de leur périphérie interne sur le fourreau 160 et au niveau de leur périphérie externe sur le corps en acier 140.The internal copper hoop 150 is itself protected by a sheath 160 complementary to the internal surface of the copper hoops 150. The sheath 160 is preferably made of stainless steel. The protection of each internal copper hoop 150 is completed by two washers 162, 164, arranged transversely to the axis 102. The washers 162, 164, respectively cover each of the axial ends of the hoops 150. They are welded at their periphery internal on the sleeve 160 and at their external periphery on the steel body 140.

Le fourreau 160 en combinaison avec les rondelles 162, 164, empêche toute corrosion des frettes internes en cuivre 150.The sleeve 160 in combination with the washers 162, 164, prevents corrosion of the internal copper hoops 150.

Comme indiqué précédemment, la présente invention a pour but de perfectionner les rouleaux conducteurs décrits dans le document FR-A-2648269 et représentés sur la figure 1 annexée.As indicated above, the object of the present invention is to improve the conductive rollers described in the document FR-A-2648269 and shown in FIG. 1 attached.

Un but important de la présente invention est d'adapter le rouleau conducteur de courant à l'utilisation de boîtes à eau.An important object of the present invention is to adapt the current conducting roller to the use of water boxes.

Un autre but important de la présente invention est de renforcer la rigidité des rouleaux conducteurs de courant.Another important object of the present invention is to strengthen the rigidity of the current conducting rollers.

Selon la présente invention, le rouleau conducteur de courant comprend une partie centrale constituant la partie principale active du rouleau et deux tourillons prolongeant la partie centrale, respectivement à chacune des extrémités de celle-ci, chacun des tourillons comprenant un corps en acier muni d'une frette interne en cuivre pourvue elle-même d'un fourreau de protection interne et ce rouleau conducteur de courant est caractérisé par le fait que la frette interne en cuivre est placée dans un alésage borgne du corps en acier et qu'il est prévu un joint compressible intercalé entre le fond de l'alésage borgne et l'extrémité correspondante de la frette interne en cuivre.According to the present invention, the current conducting roller comprises a central part constituting the main active part of the roller and two pins extending the central part, respectively at each of its ends, each of the pins comprising a steel body provided with an internal copper hoop itself provided with an internal protective sheath and this current conducting roller is characterized in that the internal copper hoop is placed in a blind bore of the steel body and that there is provided a compressible seal inserted between the bottom of the blind bore and the corresponding end of the internal copper hoop.

Selon une caractéristique avantageuse de la présente invention, le joint compressible est apte à expansion radiale lors d'une compression.According to an advantageous characteristic of the present invention, the compressible seal is capable of radial expansion during compression.

Selon une autre caractéristique avantageuse de l'invention, le corps en acier est muni d'au moins un alésage traversant généralement radial, axialement à l'extérieur de la frette en cuivre.According to another advantageous characteristic of the invention, the steel body is provided with at least one generally radial through bore, axially outside the copper hoop.

Selon une autre caractéristique avantageuse de l'invention, le corps en acier de chaque tourillon est monobloc.According to another advantageous characteristic of the invention, the steel body of each pin is in one piece.

D'autres caractéristiques, buts et avantages de la présente invention apparaîtront à la lecture de la description détaillée qui va suivre et en regard des dessins annexés donnés à titre d'exemples non limitatifs et sur lesquels :

  • la figure 1 précédemment décrite représente une vue schématique partielle en coupe axiale d'un rouleau conducteur de courant conforme au document FR-A-2648269,
  • la figure 2 représente une vue schématique partielle en coupe axiale d'un rouleau conducteur de courant conforme à la présente invention, et
  • les figures 3 et 4 représentent, selon des vues en coupe axiale longitudinale partielle, deux variantes de réalisation d'un joint compressible conforme à la présente invention.
Other characteristics, aims and advantages of the present invention will appear on reading the detailed description which follows and with reference to the appended drawings given by way of nonlimiting examples and in which:
  • FIG. 1 previously described represents a partial schematic view in axial section of a current conducting roller in accordance with document FR-A-2648269,
  • FIG. 2 represents a partial schematic view in axial section of a current conducting roller according to the present invention, and
  • Figures 3 and 4 show, in views in partial longitudinal axial section, two alternative embodiments of a compressible seal according to the present invention.

On retrouve sur la figure 2 annexée un rouleau 200 conducteur de courant comprenant une partie centrale 210 prolongée respectivement, à ses extrémités, par deux tourillons 220.We find in FIG. 2 appended a roller 200 conducting current comprising a central part 210 extended respectively, at its ends, by two pins 220.

La partie centrale 210 du rouleau est formée d'un manchon en acier 212 cylindrique de révolution autour d'un axe 202. Le cas échéant, la partie centrale 210 peut être munie d'un revêtement 214, par exemple un revêtement en cuivre déposé par électrodéposition. Ce revêtement 214 n'est cependant pas indispensable.The central part 210 of the roller is formed of a cylindrical steel sleeve 212 of revolution about an axis 202. If necessary, the central part 210 can be provided with a coating 214, for example a copper coating deposited by plating. This coating 214 is however not essential.

Un seul tourillon 220 est représenté partiellement sur la figure 2.A single pin 220 is partially shown in FIG. 2.

Le second tourillon prévu à l'extrémité opposée de la partie centrale 210 peut être symétrique de celui-ci représenté sur la figure 2.The second pin provided at the opposite end of the central part 210 can be symmetrical with the latter shown in FIG. 2.

Chaque tourillon 220 comprend de préférence comme représenté sur la figure 2 annexée : un corps en acier 240, une frette interne en cuivre 250, un fourreau de protection 260, deux rondelles 262, 264, et un joint compressible 270.Each pin 220 preferably comprises, as shown in the appended FIG. 2: a steel body 240, an internal copper hoop 250, a protective sleeve 260, two washers 262, 264, and a compressible seal 270.

Le corps en acier 240 est centré sur l'axe 202 du rouleau. Le corps en acier 240 peut faire l'objet de nombreux modes de réalisation. Il présente de préférence une section étagée sur sa longueur. Pour l'essentiel, la section étagée du corps en acier 240 est de dimension croissante à partir de l'extrémité axiale du tourillon 220 vers la partie centrale 210.The steel body 240 is centered on the axis 202 of the roller. The steel body 240 can be the subject of numerous embodiments. It preferably has a stepped section along its length. Essentially, the stepped section of the steel body 240 is of increasing size from the axial end of the journal 220 towards the central part 210.

Pour l'essentiel, le corps en acier 240 comprend une partie axialement externe 241, une partie axialement interne 242 et une zone de transition 243. La partie axialement externe 241 est formée d'une succession de portions cylindriques centrées sur l'axe 202 et de section croissante vers la partie centrale 210. La partie axialement interne 242 possède un diamètre supérieur à la partie axialement externe 241. La partie axialement interne 242 possède un rayon externe égal à celui du manchon 212. Cette partie axialement interne 242 est soudée sur le manchon 212 de la partie centrale à l'aide d'un cordon de soudure annulaire 244.Essentially, the steel body 240 comprises an axially external part 241, an axially internal part 242 and a transition zone 243. The axially external part 241 is formed by a succession of cylindrical portions centered on the axis 202 and of increasing section towards the central part 210. The axially internal part 242 has a diameter greater than the axially external part 241. The axially internal part 242 has an external radius equal to that of the sleeve 212. This axially internal part 242 is welded to the sleeve 212 of the central part using an annular weld bead 244.

La zone de transition 243 diverge par rapport à l'axe 202 en rapprochement de la partie axialement interne 242.The transition zone 243 diverges with respect to the axis 202 in approach to the axially internal part 242.

Le cas échéant, la partie axialement interne 242 peut être également recouverte par le revêtement 214.Where appropriate, the axially internal part 242 can also be covered by the coating 214.

Le corps en acier 240, plus précisément la partie axialement externe 241 de celui-ci, est muni d'un alésage axial traversant 245 de rayon R1.The steel body 240, more precisely the axially external part 241 thereof, is provided with an axial bore passing through 245 of radius R1.

Cet alésage 245 forme en combinaison avec le fourreau 260 un passage axial traversant 230, comme cela sera précisé par la suite.This bore 245 forms in combination with the sheath 260 an axial through passage 230, as will be explained later.

La partie axialement externe 241 du corps en acier 240 est en outre munie d'un second alésage borgne 246 de rayon R2 supérieur au rayon R1 de l'alésage traversant 245 précité.The axially external part 241 of the steel body 240 is further provided with a second blind bore 246 of radius R2 greater than the radius R1 of the above-mentioned through bore 245.

Le second alésage borgne 246 débouche sur l'extrémité axialement interne de la partie 241 axialement externe du corps en acier 240. Ce second alésage 246 s'étend sur la majeure partie de la longueur de la partie 241 du corps en acier 240, typiquement les 75% de la longueur de cette partie 241.The second blind bore 246 opens onto the axially internal end of the axially external part 241 of the steel body 240. This second bore 246 extends over most of the length of the part 241 of the steel body 240, typically the 75% of the length of this part 241.

En d'autres termes, le fond 247 de l'alésage borgne 246 est dirigé vers l'intérieur du rouleau. Pour cette raison, l'alésage 246 doit bien entendu être réalisé dans le corps en acier 240 avant de souder celui-ci sur le manchon central 212.In other words, the bottom 247 of the blind bore 246 is directed towards the inside of the roller. For this reason, the bore 246 must of course be produced in the steel body 240 before welding it on the central sleeve 212.

L'alésage axial 246 est conçu pour recevoir la frette interne en cuivre 250 comme indiqué dans le document FR-A-2648269.The axial bore 246 is designed to receive the internal copper hoop 250 as indicated in the document FR-A-2648269.

Pour cela, le rayon externe de la frette interne en cuivre 250 est adapté au rayon R2 de l'alésage 246.For this, the external radius of the internal copper hoop 250 is adapted to the radius R2 of the bore 246.

Le fourreau 260 est de préférence réalisé en acier inoxydable.The sleeve 260 is preferably made of stainless steel.

Le fourreau 260 est de préférence assemblé par frettage à l'intérieur de la frette en cuivre 250.The sheath 260 is preferably assembled by hooping inside the copper hoop 250.

Le fourreau 260 est destiné à protéger la frette en cuivre 250 de l'eau de refroidissement circulant dans le canal central 230 du rouleau et de l'acide chromique utilisé, le cas échéant, pour la réfection du rouleau.The sleeve 260 is intended to protect the copper hoop 250 from the cooling water circulating in the central channel 230 of the roller and from the chromic acid used, if necessary, for the repair of the roller.

Pour cela, le fourreau 260 en acier inoxydable possède une longueur supérieure à la frette en cuivre 250 et émerge axialement sur chacune des extrémités de celle-ci.For this, the stainless steel sheath 260 has a length greater than the copper hoop 250 and emerges axially on each of the ends of the latter.

De préférence, comme représenté sur la figure 2, il est prévu dans le corps en acier 240 un troisième alésage axial 248 présentant un rayon R3 intermédiaire entre le rayon R1 de l'alésage traversant 245 et le rayon R2 de l'alésage borgne 246. Le rayon R3 de ce troisième alésage axial 248 est sensiblement complémentaire du rayon externe du fourreau 260 en acier inoxydable. Par ailleurs, le fourreau 260 possède un rayon interne égal R1 de l'alésage 245. Ainsi, le fourreau 260 ne fait pas saillie à l'intérieur du passage axial 230 et ne perturbe pas la circulation de l'eau de refroidissement.Preferably, as shown in FIG. 2, there is provided in the steel body 240 a third axial bore 248 having a radius R3 intermediate between the radius R1 of the through bore 245 and the radius R2 of the blind bore 246. The radius R3 of this third axial bore 248 is substantially complementary to the external radius of the sleeve 260 of stainless steel. Furthermore, the sleeve 260 has an equal internal radius R1 of the bore 245. Thus, the sleeve 260 does not protrude inside the axial passage 230 and does not disturb the circulation of the cooling water.

La rondelle 262 et la rondelle 264 sont de préférence réalisées en acier inoxydable.The washer 262 and the washer 264 are preferably made of stainless steel.

La rondelle 262 est placée sur l'extrémité axialement interne de la frette en cuivre 250. Pour protéger efficacement cette dernière, la rondelle 262 est fixée, par sa périphérie radialement externe sur le corps acier 240 et par sa périphérie radialement interne sur le fourreau en acier inoxydable 260.The washer 262 is placed on the axially internal end of the copper hoop 250. To effectively protect the latter, the washer 262 is fixed, by its radially external periphery to the steel body 240 and by its radially internal periphery to the sheath 260 stainless steel.

La rondelle 264 est placée sur l'extrémité radialement externe de la frette interne en cuivre 250. Elle est de préférence soudée par sa périphérie radialement interne sur le fourreau en acier inoxydable 260.The washer 264 is placed on the radially external end of the internal copper hoop 250. It is preferably welded by its radially internal periphery to the stainless steel sheath 260.

Toutefois, la rondelle 260 présente de préférence un rayon externe inférieur au rayon R2 de l'alésage borgne 246.However, the washer 260 preferably has an external radius less than the radius R2 of the blind bore 246.

Cette disposition a pour but de permettre l'assemblage de la frette interne en cuivre 250 et de la rondelle 264 dans l'alésage borgne 246, en garantissant un contact étroit entre la paroi externe de la frette interne en cuivre 250 et la paroi interne du corps en acier 240 formée par l'alésage borgne 246, malgré la différence de coefficient de dilatation entre le cuivre composant la frette 250 et l'acier inoxydable composant la rondelle 264.The purpose of this arrangement is to allow the internal copper hoop 250 and the washer 264 to be assembled in the blind bore 246, while ensuring close contact between the external wall of the internal copper hoop 250 and the internal wall of the steel body 240 formed by the blind bore 246, despite the difference in coefficient of expansion between the copper making up the hoop 250 and the stainless steel making up the washer 264.

Pour garantir une bonne étanchéité sur l'extrémité axialement externe de la frette interne en cuivre 250 malgré la section de la rondelle 264 inférieure à celle de l'alésage 246, comme indiqué précédemment, il est prévu selon l'invention de disposer un joint compressible 270 entre le fond 247 de l'alésage 246 et la rondelle 264.To guarantee a good seal on the axially external end of the internal copper hoop 250 despite the section of the washer 264 less than that of the bore 246, as indicated above, provision is made according to the invention to have a compressible seal. 270 between the bottom 247 of the bore 246 and the washer 264.

Le joint 270 est de préférence un joint conçu pour être sujet à une expansion radiale lorsqu'il subit une compression axiale.The seal 270 is preferably a seal designed to be subject to radial expansion when subjected to axial compression.

Le joint 270 est adapté à la géométrie du fond 247 de l'alésage 246.The seal 270 is adapted to the geometry of the bottom 247 of the bore 246.

Il s'agit de préférence, d'un joint silicone à lèvres.It is preferably a silicone lip seal.

On a représenté sur la figure 3, un premier mode de réalisation d'un joint 270 adapté à un fond 247 d'alésage plat et orthogonal àl'axe 202.FIG. 3 shows a first embodiment of a seal 270 adapted to a bottom 247 of flat bore and orthogonal to the axis 202.

Le joint 270 représenté sur la figure 3 comprend essentiellement un anneau 271 muni d'une première lèvre 272 dirigée généralement radialement vers l'intérieur et axialement vers l'intérieur du rouleau et d'une deuxième lèvre 273 dirigée généralement radialement vers l'extérieur et axialement vers l'extérieur du rouleau.The seal 270 shown in FIG. 3 essentially comprises a ring 271 provided with a first lip 272 directed generally radially inwards and axially inwards from the roller and with a second lip 273 directed generally radially outwards and axially towards the outside of the roller.

L'homme de l'art comprendra aisément que lorsqu'une compression axiale est exercée sur ce joint 270, celui-ci est sujet à expansion radiale. La première lèvre 272 tend à être plaquée contre la surface externe du fourreau en acier inoxydable 260 et sur la surface axialement externe de la rondelle 264. De façon symétrique, la seconde lèvre 273 tend à être plaquée contre la surface interne de l'alésage 246 et le fond 247 de celui-ci.Those skilled in the art will readily understand that when axial compression is exerted on this seal 270, it is subject to radial expansion. The first lip 272 tends to be pressed against the external surface of the stainless steel sheath 260 and on the axially external surface of the washer 264. Symmetrically, the second lip 273 tends to be pressed against the internal surface of the bore 246 and the bottom 247 thereof.

On a représenté sur la figure 4 une seconde variante de réalisation d'un joint compressible 270 adapté à un fond 247 d'alésage de section droite pyramidale.FIG. 4 shows a second alternative embodiment of a compressible seal 270 adapted to a bottom 247 of a bore of pyramidal cross section.

Le joint 270 représenté sur la figure 4 comprend un bloc annulaire 274 possédant une face 275 axialement interne plane qui repose sur la surface axialement externe de la rondelle 264. Le bloc annulaire 274 possède une surface 276 radialement interne cylindrique de révolution autour de l'axe 202 et généralement complémentaire de la surface externe du fourreau 260. Le bloc annulaire 274 possède une surface radialement externe 277 de rayon inférieur à l'alésage 246. Enfin, le bloc annulaire 274 est délimité par deux facettes 278, 279, axialement externes, inclinées par rapport à l'axe 202 pour être généralement parallèles aux facettes délimitant le fond 247 de l'alésage 246. Ces facettes 278, 279, sont munies d'une pluralité de lèvres annulaires 2790 conçues pour venir reposer sur les facettes associées du fond 247 de l'alésage 246.The seal 270 shown in FIG. 4 comprises an annular block 274 having an axially internal planar face 275 which rests on the axially external surface of the washer 264. The annular block 274 has a radially internal cylindrical surface 276 of revolution around the axis 202 and generally complementary to the external surface of the sleeve 260. The annular block 274 has a radially external surface 277 of radius less than the bore 246. Finally, the annular block 274 is delimited by two facets 278, 279, axially external, inclined relative to the axis 202 to be generally parallel to the facets delimiting the bottom 247 of the bore 246. These facets 278, 279, are provided with a plurality of annular lips 2790 designed to come to rest on the associated facets of the bottom 247 of bore 246.

Bien entendu de nombreuses autres variantes de réalisation peuvent être envisagées pour le joint 270.Of course, many other alternative embodiments can be envisaged for the seal 270.

Pour procéder à l'assemblage du rouleau conducteur qui vient d'être décrit, on procède essentiellement comme suit.In order to assemble the conductive roller which has just been described, the procedure is essentially as follows.

Le fourreau 260 en acier inoxydable est assemblé par frettage à l'intérieur de la frette interne en cuivre 250 (chauffage frette 250 et refroidissement fourreau 260). La rondelle en acier inoxydable 264 est engagée sur l'extrémité axialement externe du fourreau 260 et soudée sur celui-ci.The sheath 260 in stainless steel is assembled by hooping inside the internal copper hoop 250 (heating hoop 250 and cooling sheath 260). The stainless steel washer 264 is engaged on the axially outer end of the sleeve 260 and welded to it.

La frette interne en cuivre 250 est alors assemblée par frettage dans l'alésage 246 du corps en acier 240 (chauffage corps 240 et refroidissement frette 250). Grâce à sa dimension inférieure, la rondelle 264 ne perturbe pas cet assemblage par frettage malgré la différence de coefficient de dilatation thermique entre l'acier inoxydable et le cuivre, et malgré l'étroite complémentarité prévue entre la frette interne en cuivre 250 et l'alésage 246 (rectitude et cote précise de la surface externe de la frette 250 et de l'alésage 246, sur une grande longueur).The internal copper hoop 250 is then assembled by shrinking in the bore 246 of the steel body 240 (heating body 240 and cooling hoop 250). Thanks to its lower dimension, the washer 264 does not disturb this hooping assembly despite the difference in coefficient of thermal expansion between stainless steel and copper, and despite the close complementarity provided between the internal copper hoop 250 and the bore 246 (straightness and precise dimension of the outer surface of the hoop 250 and the bore 246, over a great length).

A la fin de l'engagement de la frette interne en cuivre 250, le joint 270 subit une compression axiale qui provoque une expansion radiale de ce joint apte à garantir une bonne étanchéité sur l'extrémité axialement externe de la frette interne en cuivre 250.At the end of the engagement of the internal copper hoop 250, the seal 270 undergoes axial compression which causes a radial expansion of this seal capable of guaranteeing a good seal on the axially external end of the internal copper hoop 250.

La rondelle en acier inoxydable 262 peut alors être placée sur l'extrémité axialement interne du fourreau 260 et soudée sur celui-ci et sur le corps en acier 240.The stainless steel washer 262 can then be placed on the axially internal end of the sleeve 260 and welded to the latter and to the steel body 240.

On notera que selon l'invention, le corps en acier 240 est monobloc. Il ne présente pas d'embout similaire à l'embout 180 précité en regard de la figure 1. La résistance mécanique du rouleau 200 est ainsi renforcée. Celui-ci peut supporter des efforts de torsion important, en particulier lors d'un arrêt brutal de la rotation.It will be noted that according to the invention, the steel body 240 is in one piece. It does not have a tip similar to the tip 180 above with reference to FIG. 1. The mechanical resistance of the roller 200 is thus reinforced. This can withstand significant torsional forces, in particular when the rotation stops suddenly.

Selon l'invention, l'un au moins des deux tourillons 220 est muni axialement sur l'extérieur de la frette interne en cuivre 250 d'au moins un alésage traversant 249 s'étendant dans une direction générale radiale par rapport à l'axe 202. Cet alésage est conçu pour déboucher dans une boîte à eau destinée à récupérer l'eau de refroidissement circulant dans le passage central 230 du rouleau. Une telle boîte à eau a été esquissée sur la figure 2 sous la référence 300. Elle peut faire l'objet de nombreux modes de réalisation connus de l'homme de l'art et ne sera donc pas décrite plus en détail par la suite. De préférence, chaque tourillon 220 possède au moins deux alésages radiaux 249 débouchant dans la boîte à eau 300.According to the invention, at least one of the two journals 220 is provided axially on the outside of the internal copper hoop 250 with at least one through bore 249 extending in a generally radial direction relative to the axis 202. This bore is designed to open into a water box intended to recover the cooling water circulating in the central passage 230 of the roller. Such a water box has been sketched in FIG. 2 under the reference 300. It can be the subject of numerous embodiments known to those skilled in the art and will therefore not be described in more detail below. Preferably, each journal 220 has at least two radial bores 249 opening into the water box 300.

L'utilisation d'une telle boîte à eau 300 permet de libérer l'extrémité axialement externe du tourillon 220, pour équiper par exemple celle-ci de moyens d'entraînement à rotation.The use of such a water box 300 makes it possible to free the axially external end of the journal 220, for example to equip the latter with rotation drive means.

Plus précisément, de préférence, il est prévu des alésages radiaux 249 sur un seul des deux tourillons 220, à savoir celui équipé des moyens d'entraînement à rotation.More specifically, preferably, there are provided radial bores 249 on only one of the two journals 220, namely that equipped with rotary drive means.

Dans ce cas, le fluide de refroidissent est introduit axialement, par le passage central 230 dans l'un des tourillons, et ressort au niveau du second tourillon par les passages radiaux 249, dans la boîte à eau 300.In this case, the coolant is introduced axially, through the central passage 230 into one of the pins, and exits at the level of the second pin through the radial passages 249, into the water box 300.

Selon une caractéristique avantageuse de l'invention, pour renforcer le contact électrique, il est prévu en outre un dépôt d'argenture entre le corps en acier 240 et la frette interne en cuivre 250.According to an advantageous characteristic of the invention, in order to reinforce the electrical contact, provision is also made for a deposit of silvering between the steel body 240 and the internal copper hoop 250.

Ce dépôt d'argenture peut être formé soit sur la surface interne de l'alésage 246, soit sur la surface externe de la frette 250.This silvering deposit can be formed either on the internal surface of the bore 246, or on the external surface of the hoop 250.

De préférence, la surface externe du tourillon 240 est chromée.Preferably, the external surface of the pin 240 is chrome-plated.

Comme schématisé sur la figure 2 annexée, la surface externe des corps en acier 240 peut être munie de portées 290, 292 pour des joints associés à un roulement placé entre ces portées. La surface externe des corps en acier 240 peut être munie également d'un filetage 280 destiné à recevoir un écrou servant au serrage de ce roulement. Les portées 290, 292 peuvent être formées par exemple en chrome, ou à l'aide d'une bague en acier inoxydable, ou encore à l'aide d'une bague en acier inoxydable revêtue d'oxyde de chrome.As shown diagrammatically in the appended FIG. 2, the external surface of the steel bodies 240 can be provided with bearing surfaces 290, 292 for seals associated with a bearing placed between these bearing surfaces. The external surface of the steel bodies 240 can also be provided with a thread 280 intended to receive a nut used for tightening this bearing. The bearing surfaces 290, 292 can be formed for example from chrome, or using a stainless steel ring, or even using a stainless steel ring coated with chromium oxide.

Les filetages 280 peuvent être formés dans la masse des corps en acier 240.The threads 280 can be formed in the mass of the steel bodies 240.

L'extrémité axiale des corps en acier 240 est adaptée de façon connue en soi pour recevoir les moyens d'entraînement à rotation. A titre d'exemple non limitatif, l'extrémité des corps en acier 240 peut être munie d'un taraudage 2400, dans l'alésage 245, et d'un filetage externe 2402.The axial end of the steel bodies 240 is adapted in a manner known per se to receive the rotary drive means. By way of nonlimiting example, the end of the steel bodies 240 may be provided with a thread 2400, in the bore 245, and with an external thread 2402.

Le taraudage 2400 et destiné à recevoir un bouchon d'étanchéité.The 2400 internal thread is intended to receive a sealing plug.

Le filetage 2402 est destiné à recevoir un écrou de serrage de la boîte à eau, et les moyens d'entraînement.The thread 2402 is intended to receive a tightening nut of the water box, and the drive means.

Une portée de collecteur 294 peut être formée entre le filetage 280 et la boîte à eau. Cette portée de collecteur 294 peut être formée par dépôt d'argenture ou de cuivre par électrolyse par exemple.A manifold surface 294 can be formed between the thread 280 and the water box. This collector surface 294 can be formed by depositing silver or copper by electrolysis for example.

Claims (17)

  1. A current-conducting roller comprising a central portion constituting the main axial portion (210) of the roller and two half-shafts (220) extending respective ends of the central portion, each half-shaft (220) comprising a steel body (240) provided with an internal copper heat-shrink fitting (250) itself provided with an internal protective bushing (260), the roller being characterized by the facts that the internal copper fitting (250) is placed in a blind bore (246) of the steel body (240) and that it is provided with a compressible gasket (270) interposed between the end (247) of the blind bore (246) and the corresponding end of the internal copper fitting (250).
  2. A current-conducting roller according to claim 1, characterized by the fact that the compressible gasket (270) is suitable for expanding radially when subjected to axial compression.
  3. A current-conducting roller according to claim 1 or 2, characterized by the fact that the compressible gasket (270) is made of silicone.
  4. A current-conducting roller according to any one of claims 1 to 3, characterized by the fact that the compressible gasket (270) is formed by a base ring (271, 274) carrying at least one annular lip (272, 272; 2790).
  5. A current-conducting roller according to any one of claims 1 to 4, characterized by the fact that the compressible gasket (270) comprises a base ring (271) provided with a first lip (272) directed generally radially inwards and axially towards the inside of the roller, and with a second lip (273) directed generally radially outwards and axially towards the outside of the roller.
  6. A current-conducting roller according to any one of claims 1 to 4, characterized by the fact that the compressible gasket (270) comprises a base ring (274) which is generally complementary in shape to the bottom (247) of the blind bore (246) and which carries annular sealing lips (2790).
  7. A current-conducting roller according to any one of claims 1 to 6, characterized by the fact that the steel body (240) is provided with at least one generally radial through duct (249) located axially outside the copper fitting (250).
  8. A current-conducting roller according to claim 7, characterized by the fact that only one of the half-shafts is provided with generally radial through ducts (249).
  9. A current-conducting roller according to any one of claims 1 to 8, characterized by the fact that the steel body (240) of each half-shaft (220) is made as a single piece.
  10. A current-conducting roller according to any one of claims 1 to 9, characterized by the fact that the internal protective bushing (260) is made of stainless steel.
  11. A current-conducting roller according to any one of claims 1 to 10, characterized by the fact that a metal washer (264) is interposed between the compressible gasket (270) and the corresponding end of the internal copper fitting (250).
  12. A current-conducting roller according to claim 11, characterized by the fact that the metal washer (264) is made of stainless steel.
  13. A current-conducting roller according to claim 11 or 12, characterized by the fact that the metal washer (264) is welded on the protective bushing (260).
  14. A current-conducting roller according to any one of claims 11 to 13, characterized by the fact that the outside radius of the metal washer (264) is less than the radius of the copper fitting (250).
  15. A current-conducting roller according to any one of claims 11 to 14, characterized by the fact that a second metal washer (262) is fixed on the axially inner end of the internal copper fitting (250).
  16. A current-conducting roller according to claim 15, characterized by the fact that the second metal washer (262) is welded to the steel body (240) and to the internal protective bushing (260).
  17. A current-conducting roller according to any one of claims 1 to 16, characterized by the fact that the internal protective bushing (260) is received in a complementary blind bore (248) formed in the steel body (240) in such a manner that the bushing (260) does not project into the axial passage (230) of the roller.
EP92402792A 1991-10-15 1992-10-13 Current conducting rolls for electroplating installations Expired - Lifetime EP0538113B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9112678 1991-10-15
FR9112678A FR2682525B1 (en) 1991-10-15 1991-10-15 IMPROVEMENT ON CURRENT CONDUCTING ROLLERS IN PARTICULAR FOR ELECTROLYSIS LINES.

Publications (2)

Publication Number Publication Date
EP0538113A1 EP0538113A1 (en) 1993-04-21
EP0538113B1 true EP0538113B1 (en) 1996-01-03

Family

ID=9417918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402792A Expired - Lifetime EP0538113B1 (en) 1991-10-15 1992-10-13 Current conducting rolls for electroplating installations

Country Status (8)

Country Link
US (1) US5310467A (en)
EP (1) EP0538113B1 (en)
JP (1) JP3227470B2 (en)
AT (1) ATE132548T1 (en)
CA (1) CA2080620C (en)
DE (1) DE69207335T2 (en)
ES (1) ES2081073T3 (en)
FR (1) FR2682525B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3076299B1 (en) * 2017-12-29 2021-01-08 Polimiroir CURRENT CONDUCTIVE ROLLS

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150469C2 (en) * 1981-12-19 1985-02-07 Saueressig & Co, 4426 Vreden Device for electroplating a rotary printing cylinder
FR2648269B1 (en) * 1989-06-12 1994-02-18 Polimiroir CURRENT CONDUCTING ROLL

Also Published As

Publication number Publication date
EP0538113A1 (en) 1993-04-21
CA2080620C (en) 2002-07-23
US5310467A (en) 1994-05-10
JPH0754838A (en) 1995-02-28
JP3227470B2 (en) 2001-11-12
DE69207335T2 (en) 1996-08-22
FR2682525B1 (en) 1994-01-14
FR2682525A1 (en) 1993-04-16
CA2080620A1 (en) 1993-04-16
ATE132548T1 (en) 1996-01-15
DE69207335D1 (en) 1996-02-15
ES2081073T3 (en) 1996-02-16

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