EP2064373A2 - Equipment for the surface treatment of parts by immersion in a processing liquid - Google Patents

Equipment for the surface treatment of parts by immersion in a processing liquid

Info

Publication number
EP2064373A2
EP2064373A2 EP07825173A EP07825173A EP2064373A2 EP 2064373 A2 EP2064373 A2 EP 2064373A2 EP 07825173 A EP07825173 A EP 07825173A EP 07825173 A EP07825173 A EP 07825173A EP 2064373 A2 EP2064373 A2 EP 2064373A2
Authority
EP
European Patent Office
Prior art keywords
parts
drum
drums
cassettes
surface treatment
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.)
Granted
Application number
EP07825173A
Other languages
German (de)
French (fr)
Other versions
EP2064373B1 (en
Inventor
Frédéric Vacheron
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.)
Tornos Management Holding SA
Original Assignee
Golden Eagle Trading Ltd
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 Golden Eagle Trading Ltd filed Critical Golden Eagle Trading Ltd
Priority to PL07825173T priority Critical patent/PL2064373T3/en
Publication of EP2064373A2 publication Critical patent/EP2064373A2/en
Application granted granted Critical
Publication of EP2064373B1 publication Critical patent/EP2064373B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • C25D17/18—Apparatus for electrolytic coating of small objects in bulk having closed containers
    • C25D17/20—Horizontal barrels
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/06—Suspending or supporting devices for articles to be coated
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/10—Agitating of electrolytes; Moving of racks

Definitions

  • the present invention relates to an improvement in the surface treatment of parts using the principle of immersion in one or more tanks for the treatment and transfer of parts between these tanks, in particular the electrochemical treatments of surfaces of metal parts, and more particularly a treatment by anodizing aluminum parts.
  • anodic treatments of aluminum and its alloys are anodic anodization or anodic passivation, porous anodization in an acid medium or anodic dissolution, or even electrolytic polishing, hard anodizing or self-colored.
  • the present invention relates in particular to an improvement of a treatment plant and more particularly of its parts conveyor chain.
  • Document DE 2 119 401 describes such an installation, comprising motorized carriages traveling over several treatment bins.
  • the trolleys are provided with movable arms making vertical movements to plunge batches of objects to be treated in successive bins and out of them.
  • This document relates more specifically to a safety braking system of its trolleys.
  • the conveying system comprises two parallel chains, arranged on either side of the tanks, whose conveying axes are perpendicular to the axes of the rotary drums. Each cassette passes alternately from one chain to another after passing through a treatment tank. This conveying system therefore requires a drive device for each chain and several transfer devices between the chains and the tanks.
  • the present invention provides an improvement to the transfer system of the parts to be treated.
  • the invention proposes a room surface treatment installation comprising a plurality of treatment tanks arranged in series, equipped with rotary drums provided with means for temporarily fixing workpieces, and whose axes are mounted horizontally in rotation so that the major part of each drum is immersed in a treatment liquid contained in the corresponding tank, and a conveyor chain for supplying each drum with parts to be treated and to remove from said drum parts already treated, installation wherein said conveying is on a general axis, the axes of the drums being parallel to each other and parallel to the general axis of the conveyor chain.
  • the axes of the drums are arranged substantially in the same vertical plane and the general axis of the conveyor chain is arranged in the vertical plane containing the axes of rotation of the drums.
  • the periphery of a drum comprises a succession of rails or rails with an axis parallel to the axis of rotation of the drum, intended to receive cassettes supporting a set of parts to be treated, the cassettes being intended to do with the drum on which they are fixed a complete turn in the treatment liquid, while the conveyor chain is intended to supply cassettes of parts to treat the drum and to remove from the drum the cassettes of parts already treated, the conveyor chain is disposed above the tanks, and the general axis of conveying is parallel to the axis of rotation of the drums and disposed in the vertical space comprising the tanks.
  • the drums can be arranged so that their pairs of slides that momentarily come to the upper position emerge from the process liquids and are aligned with each other, so that all transfers can be performed simultaneously.
  • This installation may include transfer slides arranged between two successive tanks and aligned with the slides of the drums in the upper position.
  • This installation may include means for spraying parts at the transfer slides.
  • the parts transfer operations of the conveyor chain are timed and synchronous.
  • the conveyor chain comprises at least one movable carriage moving back and forth on a guide rail in order to achieve by this displacement the clearance, by horizontal translation, of one or several cassettes comprising the parts already processed, and the establishment, also by horizontal translation, of one or more cassettes comprising the parts not yet processed.
  • the mobile carriage may comprise a motor connected to a pinion cooperating with a rack to ensure its movements back and forth on the rail.
  • the lower part of the carriage may comprise a horizontal control bar which carries at least one vertical arm terminated by an actuating part, while the control bar is retained at the bottom of the carriage by means of two pivoting rods, the pivoting rods ensuring the movement downwards and upwards of said bar.
  • Figure 1 is a side view of the installation.
  • Figure 2 is a top view of the installation.
  • Figure 3 is an end view of a vessel with the conveyor chain.
  • Figures 4 and 5 are detail views of a movable carriage of the conveyor chain in two different positions.
  • FIGS. 1 and 2 illustrate an installation for surface treatment of metal parts such as, for example, anodizing of aluminum parts, which requires a succession of tanks (4) containing different liquids, such as degreasing liquid, liquid satin finish, electrolytic solution, rinse aid, etc.
  • One of the treatment tanks is filled with an electrolytic solution, for example sulfuric acid, and makes it possible to anodize aluminum parts fixed on cassettes.
  • the tank comprises two electrodes while the drum is supplied with electric current of polarity opposite to that of the electrodes, said electric current being transmitted to the parts to be processed via the drum and cassettes successively, as this is described in the French patent application No. 0603687 applicants, whose content is incorporated herein by reference.
  • each piece is immersed in each tank, making it do at least one rotational movement such that the air bubbles and air pockets likely to be created inside the tank in contact with the part are driven, allowing the treatment liquid to treat the entire surface of the part, making the treatment perfectly homogeneous.
  • a predetermined number of said pieces to be treated are placed beforehand on a support or cassette (5) comprising at least one holding member adapted to retain each of they.
  • the cassettes are for example those described in the European patent application EP-AI 433 537, which comprise a set of parts holding members for fixing on a single cassette several parts.
  • the conveyor chain (14) comprises a plurality of carriages (9) for engaging the cassettes of workpieces on the drums and for disengaging the cassettes of treated parts from each of the drums.
  • the drum (2) comprises, at its outer periphery, a succession of 6 pairs of slides (6) intended to receive the cassettes (5) serving to support the parts to be treated.
  • the cassettes comprising the parts not yet treated are engaged by horizontal displacement in the free slide and not immersed, disposed at the top of the drum.
  • the axis of sliding of each of the slides (6) is parallel to the axis of rotation of the corresponding drum.
  • the tank (4) comprises a motor (7) for rotating the pivoting drum (2) by the cooperation of a toothed wheel (70) with a succession of rods (71) mounted parallel to each other, and between two flanges of one side of the drum, such as the drive ring, as described in French Patent Application No. 0603687.
  • the entire conveyor chain illustrated in FIGS. 1 and 2 operates in sequences of synchronous and synchronous displacements.
  • a treated cassette is disengaged and a new untreated cassette is engaged on a drum, and then immersed during the rotation of the corresponding drum, to make a complete turn, in the treatment liquid.
  • the 4 th vessel which contains a drum of a length equivalent to four cassettes, these are four complete revolutions and four translations before being released.
  • the conveyor chain comprises a feed station (15), a release station (16), and a transfer zone between the 2 nd and 3 em ⁇ vessel longer than the other, which can be used spray station with a rinsing liquid.
  • the conveyor chain (14) comprises at least one associated carriage (8), making a limited movement back and forth on a guide rail (9) to allow, by this movement back and forth, the release of one or more cassettes comprising the parts already treated, and the establishment of one or more cassettes comprising the parts not yet treated.
  • Each of the carriages (8) comprises a motor connected to a pinion cooperating with a rack to ensure its movements back and forth on the rail.
  • the carriage (8) comprises a horizontal control bar (10) which comprises at least one vertical arm (11a, 11b) for retaining an actuating piece (12).
  • This actuating piece is intended to slide the cassette out of pieces already treated, that is to say those having made a complete revolution in the liquid and engage the next cassette parts not yet treated.
  • the control bar is retained at the bottom of the carriage by means of two pivoting rods (17a, 17b), the pivoting rods ensuring the vertical movement of the bar. Thanks to the pivoting rods (17a, 17b) the control rod moves downwards and upwards parallel to itself.
  • Figures 4 and 5 illustrate the operation of a movable carriage (8).
  • the carriage (8) in the release position is such that the horizontal bar (10) is in the upper release position, which allows the carriage to move upstream of the chain, according to the arrow D, for a new action.
  • the horizontal bar is moved downwards, as shown in FIG. 5, so that the actuating part (s) 12 can come into the plane of the cassettes (5), then the carriage (8) moves downstream of the chain, according to the arrow (A), in the opposite direction to that of the clearance (D), in order to engage in the slide (6) a new cassette, and to progress position a cassette and / or clear the cassette of parts already processed. It will be observed that in FIG.
  • Figure 3 illustrates a drum with six cassette attachment positions. This number could be different. With, for example, only two fixing positions, it is possible to make a small tank requiring little treatment liquid, in particular for a fast treatment stage.
  • the structure of the drum is not necessarily cylindrical or hexagonal but can be reduced to two arms.
  • the respective durations of the successive processing steps can be modulated with each other thanks to the number of different fixing positions on the drums. .
  • the conveyor chain could use only one motor, the movements of all the mobile carriages taking place via a system of mechanical drives.
  • the cassettes mentioned above are particularly suitable for processing a large number of small parts. In the case of the treatment of large parts, they can be fixed directly on a drum, or by other means of attachment as slides.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Coating Apparatus (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Chemically Coating (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Crushing And Grinding (AREA)

Abstract

The invention relates to an equipment for the surface treatment of parts, that comprises a plurality of treatment vats (4) arranged in series and comprising rotating drums (2) provided with means for temporarily attaching the parts to be processed and having their axes (XX') rotatingly mounted horizontally so that the major portion of each drum (2) is submerged in the processing liquid contained in the corresponding vat, and a conveyor line (14) for supplying each drum (2) with parts to be processed and for removing from said drum the parts already processed, characterised in that the conveying process is carried out along a general axis (ZZ'), and in that the axes (XX') of the drums are parallel relative to each other and parallel to the general axis (ZZ') of the conveyor line.

Description

INSTALLATION DE TRAITEMENT DE SURFACE DE PIECES PAR IMMERSION DANS UN LIQUIDE DE TRAITEMENT INSTALLATION FOR SURFACE TREATMENT OF PIECES BY IMMERSION IN A TREATMENT FLUID
La présente invention concerne un perfectionnement dans les traitements de surface de pièces utilisant le principe d'immersion dans une ou plusieurs cuves de traitement et transfert des pièces entre ces cuves, notamment les traitements électrochimiques de surfaces de pièces métalliques, et plus particulièrement un traitement par anodisation de pièces en aluminium.The present invention relates to an improvement in the surface treatment of parts using the principle of immersion in one or more tanks for the treatment and transfer of parts between these tanks, in particular the electrochemical treatments of surfaces of metal parts, and more particularly a treatment by anodizing aluminum parts.
On peut citer, à titre d'exemples de traitements anodiques de l'aluminium et de ses alliages, l'anodisation barrière ou passivation anodique, l'anodisation poreuse en milieu acide ou la dissolution anodique, voire le polissage électrolytique, l'anodisation dure ou auto-colorée.Examples of anodic treatments of aluminum and its alloys are anodic anodization or anodic passivation, porous anodization in an acid medium or anodic dissolution, or even electrolytic polishing, hard anodizing or self-colored.
La présente invention concerne notamment un perfectionnement d'une installation de traitement et plus particulièrement de sa chaîne de convoyage des pièces.The present invention relates in particular to an improvement of a treatment plant and more particularly of its parts conveyor chain.
On connaît déjà des installations de traitement de surface de pièces en aluminium fonctionnant par batchs . Le document DE 2 119 401 décrit une telle installation, comprenant des chariots motorisés effectuant un parcours au-dessus de plusieurs bacs de traitement. Les chariots sont munis de bras mobiles effectuant des mouvements verticaux pour plonger des lots d'objets à traiter dans les bacs successifs et les en ressortir. Ce document concerne plus spécifiquement un système de freinage de sécurité de ses chariots.Surface treatment installations of aluminum parts operating in batches are already known. Document DE 2 119 401 describes such an installation, comprising motorized carriages traveling over several treatment bins. The trolleys are provided with movable arms making vertical movements to plunge batches of objects to be treated in successive bins and out of them. This document relates more specifically to a safety braking system of its trolleys.
Dans la demande de brevet français N° 0603687, et dans la demande de brevet WO2006/00199, dont le contenu est incorporé ici par référence, les déposants ont déjà décrit des installations de traitement de surface de pièces comprenant une pluralité de cuves de traitement agencées en série et équipées chacune d'un tambour rotatif muni de moyens de fixation temporaire de pièces à traiter et dont l'axe est monté horizontalement en rotation de telle sorte que la majeure partie de chaque tambour soit immergée dans un liquide de traitement contenu dans la cuve correspondante, et un système de convoyage destiné à alimenter chaque tambour en pièces à traiter et à retirer du dit tambour les pièces déjà traitées.In the French patent application No. 0603687, and in the patent application WO2006 / 00199, the content of which is incorporated herein by reference, the applicants have already described surface treatment facilities of parts comprising a plurality of treatment tanks arranged in series and each equipped with a rotary drum provided with means for temporarily fixing workpieces and whose axis is mounted horizontally in rotation so that the major part of each drum is immersed in a treatment liquid contained in the corresponding tank, and a conveyor system intended to supply each drum with parts to be treated and to remove from said drum the parts already treated.
Ces pièces sont mises en place sur des cassettes, comme par exemple celles divulguées dans la demande de brevet EP-A-I 433 537, lesdites cassettes étant mises en place sur la périphérie d'un tambour pivotant. Le système de convoyage comprend deux chaînes parallèles, agencées de part et d'autre des cuves, dont les axes de convoyage sont perpendiculaires aux axes des tambours rotatifs. Chaque cassette passe alternativement d'une chaîne à l'autre après avoir passé dans une cuve de traitement. Ce système de convoyage nécessite donc un dispositif d'entraînement pour chaque chaîne et plusieurs dispositifs de transfert entre les chaînes et les cuves.These parts are placed on cassettes, such as those disclosed in the patent application EP-A-I 433 537, said cassettes being placed on the periphery of a pivoting drum. The conveying system comprises two parallel chains, arranged on either side of the tanks, whose conveying axes are perpendicular to the axes of the rotary drums. Each cassette passes alternately from one chain to another after passing through a treatment tank. This conveying system therefore requires a drive device for each chain and several transfer devices between the chains and the tanks.
La présente invention apporte un perfectionnement au système de transfert des pièces à traiter.The present invention provides an improvement to the transfer system of the parts to be treated.
À cet effet, l'invention propose une installation de traitement de surface de pièces comprenant une pluralité de cuves de traitement agencées en série, équipées de tambours rotatifs munis de moyens de fixation temporaire de pièces à traiter, et dont les axes sont montés horizontalement en rotation de telle sorte que la majeure partie de chaque tambour soit immergée dans un liquide de traitement contenu dans la cuve correspondante, et une chaîne de convoyage destinée à alimenter chaque tambour en pièces à traiter et à retirer du dit tambour des pièces déjà traitées, installation dans laquelle le dit convoyage s'effectue sur un axe général, les axes des tambours étant parallèles entre eux et parallèles à l'axe général de la chaîne de convoyage.For this purpose, the invention proposes a room surface treatment installation comprising a plurality of treatment tanks arranged in series, equipped with rotary drums provided with means for temporarily fixing workpieces, and whose axes are mounted horizontally in rotation so that the major part of each drum is immersed in a treatment liquid contained in the corresponding tank, and a conveyor chain for supplying each drum with parts to be treated and to remove from said drum parts already treated, installation wherein said conveying is on a general axis, the axes of the drums being parallel to each other and parallel to the general axis of the conveyor chain.
De préférence, les axes des tambours sont agencés sensiblement dans le même plan vertical et l'axe général de la chaîne de convoyage est disposé dans le plan vertical contenant les axes de rotation des tambours.Preferably, the axes of the drums are arranged substantially in the same vertical plane and the general axis of the conveyor chain is arranged in the vertical plane containing the axes of rotation of the drums.
Selon un mode d'exécution particulier de l'installation de traitement de surface de pièces selon l'invention, la périphérie d' un tambour comprend une succession de glissières ou de rails d'axe parallèle à l'axe de rotation du tambour, destinés à recevoir des cassettes supportant un ensemble de pièces à traiter, les cassettes étant destinées à faire avec le tambour sur lequel elles sont fixées un tour complet dans le liquide de traitement, tandis que la chaîne de convoyage est destinée à alimenter en cassettes de pièces à traiter le tambour et à retirer du tambour les cassettes de pièces déjà traitées, la chaîne de convoyage est disposée au-dessus des cuves, et l'axe général de convoyage est parallèle à l'axe de rotation des tambours et disposé dans l'espace vertical comprenant les cuves.According to a particular embodiment of the surface treatment plant of parts according to the invention, the periphery of a drum comprises a succession of rails or rails with an axis parallel to the axis of rotation of the drum, intended to receive cassettes supporting a set of parts to be treated, the cassettes being intended to do with the drum on which they are fixed a complete turn in the treatment liquid, while the conveyor chain is intended to supply cassettes of parts to treat the drum and to remove from the drum the cassettes of parts already treated, the conveyor chain is disposed above the tanks, and the general axis of conveying is parallel to the axis of rotation of the drums and disposed in the vertical space comprising the tanks.
Dans cette installation, les tambours peuvent être agencés de sorte que leurs paires de glissières qui viennent momentanément en position supérieure émergent des liquides des traitements et sont alignées les unes avec les autres, de sorte que tous les transferts peuvent s'effectuer simultanément.In this installation, the drums can be arranged so that their pairs of slides that momentarily come to the upper position emerge from the process liquids and are aligned with each other, so that all transfers can be performed simultaneously.
Cette installation peut comporter des glissières de transfert disposées entre deux cuves successives et alignées avec les glissières des tambours en position supérieure. C'est installation peut comporter des moyens d'aspersion des pièces au niveau des glissières de transfert.This installation may include transfer slides arranged between two successive tanks and aligned with the slides of the drums in the upper position. This installation may include means for spraying parts at the transfer slides.
Selon un mode d'exécution préféré de l'invention, les opérations de transfert de pièces de la chaîne de convoyage sont cadencées et synchrones.According to a preferred embodiment of the invention, the parts transfer operations of the conveyor chain are timed and synchronous.
Selon un mode d'exécution de l'invention, la chaîne de convoyage comprend au moins un chariot mobile effectuant un déplacement de va et vient sur un rail de guidage afin de réaliser par ce déplacement le dégagement, par translation horizontale, d'une ou de plusieurs cassettes comprenant les pièces déjà traitées, et la mise en place, également par translation horizontale, d'une ou de plusieurs cassettes comprenant les pièces non encore traitées.According to one embodiment of the invention, the conveyor chain comprises at least one movable carriage moving back and forth on a guide rail in order to achieve by this displacement the clearance, by horizontal translation, of one or several cassettes comprising the parts already processed, and the establishment, also by horizontal translation, of one or more cassettes comprising the parts not yet processed.
Le chariot mobile peut comprendre un moteur relié à un pignon coopérant avec une crémaillère afin d'assurer ses déplacements de va et vient sur le rail.The mobile carriage may comprise a motor connected to a pinion cooperating with a rack to ensure its movements back and forth on the rail.
La partie inférieure du chariot peut comprendre une barre horizontale de commande qui porte au moins un bras vertical terminé par une pièce d'actionnement, tandis que la barre de commande est retenue à la partie inférieure du chariot par l'intermédiaire de deux biellettes pivotantes, le pivotement des biellettes assurant le déplacement vers le bas et vers le haut de ladite barre.The lower part of the carriage may comprise a horizontal control bar which carries at least one vertical arm terminated by an actuating part, while the control bar is retained at the bottom of the carriage by means of two pivoting rods, the pivoting rods ensuring the movement downwards and upwards of said bar.
D'autres caractéristiques et avantages de l'invention se dégageront de la description qui va suivre en regard des dessins annexés qui ne sont donnés qu'à titre d'exemples non limitatifs.Other features and advantages of the invention will become apparent from the description which follows with reference to the accompanying drawings which are given by way of non-limiting examples.
La figure 1 est une vue latérale de l'installation.Figure 1 is a side view of the installation.
La figure 2 est une vue de dessus de l'installation.Figure 2 is a top view of the installation.
La figure 3 est une vue en bout d'une cuve avec la chaîne de convoyage.Figure 3 is an end view of a vessel with the conveyor chain.
Les figures 4 et 5 sont des vues de détails d'un chariot mobile de la chaîne de convoyage dans deux positions différentes.Figures 4 and 5 are detail views of a movable carriage of the conveyor chain in two different positions.
Les figures 1 et 2 illustrent une installation de traitement de surface de pièces métalliques tel que, par exemple, une anodisation de pièces en aluminium, qui nécessite une succession de cuves (4) contenant des liquides différents, tels que liquide de dégraissage, liquide de satinage, solution électrolytique, liquide de rinçage, etc. L'une des cuves de traitement est remplie d'une solution électrolytique, par exemple de l'acide sulfurique, et permet de réaliser l'anodisation de pièces en aluminium fixées sur des cassettes. Pour ce type de traitement la cuve comprend deux électrodes tandis que le tambour est alimenté en courant électrique de polarité opposée à celle des électrodes, ledit courant électrique étant transmis aux pièces à traiter par l'intermédiaire successivement du tambour et des cassettes, tel que cela est décrit dans la demande de brevet français N° 0603687 des demandeurs, dont le contenu est incorporé ici par référence. Selon le procédé mettant en œuvre l'installation de traitement de l'invention, on immerge chaque pièce dans chaque cuve, en lui faisant faire au moins un mouvement de rotation tel que les bulles d'air et poches d'air susceptibles d'être créées à l'intérieur de la cuve au contact de la pièce sont chassées, permettant ainsi au liquide de traitement de traiter l'intégralité de la surface de la pièce, rendant le traitement parfaitement homogène.FIGS. 1 and 2 illustrate an installation for surface treatment of metal parts such as, for example, anodizing of aluminum parts, which requires a succession of tanks (4) containing different liquids, such as degreasing liquid, liquid satin finish, electrolytic solution, rinse aid, etc. One of the treatment tanks is filled with an electrolytic solution, for example sulfuric acid, and makes it possible to anodize aluminum parts fixed on cassettes. For this type of treatment the tank comprises two electrodes while the drum is supplied with electric current of polarity opposite to that of the electrodes, said electric current being transmitted to the parts to be processed via the drum and cassettes successively, as this is described in the French patent application No. 0603687 applicants, whose content is incorporated herein by reference. According to the method implementing the treatment plant of the invention, each piece is immersed in each tank, making it do at least one rotational movement such that the air bubbles and air pockets likely to be created inside the tank in contact with the part are driven, allowing the treatment liquid to treat the entire surface of the part, making the treatment perfectly homogeneous.
Un nombre déterminé desdites pièces à traiter sont placées au préalable sur un support ou cassette (5) comprenant au moins un organe de maintien apte à retenir chacune d'entre elles. Les cassettes sont par exemple celles décrites dans la demande de brevet européen EP-A-I 433 537, qui comprennent un ensemble d'organes de maintien de pièces permettant de fixer sur une seule cassette plusieurs pièces. La chaîne de convoyage (14) comprend plusieurs chariots (9) afin d' engager les cassettes de pièces à traiter sur les tambours et de dégager de chacun des tambours les cassettes de pièces traitées.A predetermined number of said pieces to be treated are placed beforehand on a support or cassette (5) comprising at least one holding member adapted to retain each of they. The cassettes are for example those described in the European patent application EP-AI 433 537, which comprise a set of parts holding members for fixing on a single cassette several parts. The conveyor chain (14) comprises a plurality of carriages (9) for engaging the cassettes of workpieces on the drums and for disengaging the cassettes of treated parts from each of the drums.
Comme l'illustre la figure 3, on fait ainsi faire une ou plusieurs rotations complètes de 360°, en fixant les pièces (1) à traiter sur la périphérie d'un tambour (2) monté en rotation dans chaque cuve de traitement (4) autour d'un axe horizontal (X, X'), ledit tambour étant immergé dans le liquide de traitement (3) contenu dans la cuve (4), à l'exception de sa portion supérieure, qui se trouve hors du liquide afin de permettre la mise en place et le retrait des pièces. Selon le mode de réalisation illustré, le tambour (2) comprend, à sa périphérie externe une succession de 6 paires de glissières (6), destinées à recevoir les cassettes (5) servant de support des pièces à traiter. Ainsi les cassettes comprenant les pièces non encore traitées sont engagées par déplacement horizontal dans la glissière libre et non immergée, disposée au sommet du tambour. L'axe de coulissement de chacune des glissières (6) est parallèle à l'axe de rotation du tambour correspondant.As illustrated in FIG. 3, one or more complete rotations of 360 ° are thus made, by fixing the parts (1) to be treated on the periphery of a drum (2) mounted in rotation in each treatment tank (4). ) about a horizontal axis (X, X '), said drum being immersed in the treatment liquid (3) contained in the tank (4), with the exception of its upper portion, which is outside the liquid so to allow the installation and removal of parts. According to the illustrated embodiment, the drum (2) comprises, at its outer periphery, a succession of 6 pairs of slides (6) intended to receive the cassettes (5) serving to support the parts to be treated. Thus the cassettes comprising the parts not yet treated are engaged by horizontal displacement in the free slide and not immersed, disposed at the top of the drum. The axis of sliding of each of the slides (6) is parallel to the axis of rotation of the corresponding drum.
La cuve (4) comprend un moteur (7) destiné à mettre en rotation le tambour pivotant (2) grâce à la coopération d'une roue dentée (70) avec une succession de piges (71) montées parallèles entre elles, et entre les deux flasques de l'un des flancs du tambour, comme par exemple la couronne d'entraînement, telle que décrite dans la demande de brevet français N°0603687.The tank (4) comprises a motor (7) for rotating the pivoting drum (2) by the cooperation of a toothed wheel (70) with a succession of rods (71) mounted parallel to each other, and between two flanges of one side of the drum, such as the drive ring, as described in French Patent Application No. 0603687.
L'ensemble de la chaîne de convoyage illustré dans les figures 1 et 2 fonctionne par séquences de déplacements cadencés et synchrones. A chacune des séquences dans les 5 cuves courtes, une cassette traitée est dégagée et une nouvelle cassette non encore traitée est engagée sur un tambour, puis est immergée lors de la rotation du tambour correspondant, pour faire un tour complet, dans le liquide de traitement. Dans la 4ème cuve, qui contient un tambour d'une longueur équivalente à 4 cassettes, celles-ci font 4 tours complets et 4 translations avant d'être dégagées. La chaîne de convoyage comporte une station d'alimentation (15), une station de dégagement (16), et une zone de transfert entre la 2eme et la 3emβ cuve plus longue que les autres, qui peut servir de station d'aspersion par un liquide de rinçage.The entire conveyor chain illustrated in FIGS. 1 and 2 operates in sequences of synchronous and synchronous displacements. At each of the sequences in the short tanks, a treated cassette is disengaged and a new untreated cassette is engaged on a drum, and then immersed during the rotation of the corresponding drum, to make a complete turn, in the treatment liquid. . In the 4 th vessel, which contains a drum of a length equivalent to four cassettes, these are four complete revolutions and four translations before being released. The conveyor chain comprises a feed station (15), a release station (16), and a transfer zone between the 2 nd and 3 emβ vessel longer than the other, which can be used spray station with a rinsing liquid.
Pour chaque cuve, la chaîne de convoyage (14) comprend au moins un chariot mobile (8) associé, effectuant un déplacement limité de va et vient sur un rail de guidage (9) afin de permettre, par ce déplacement de va et vient, le dégagement d'une ou de plusieurs cassettes comprenant les pièces déjà traitées, et la mise en place d'une ou de plusieurs cassettes comprenant les pièces non encore traitées.For each tank, the conveyor chain (14) comprises at least one associated carriage (8), making a limited movement back and forth on a guide rail (9) to allow, by this movement back and forth, the release of one or more cassettes comprising the parts already treated, and the establishment of one or more cassettes comprising the parts not yet treated.
Chacun des chariots (8) comprend un moteur relié à un pignon coopérant avec une crémaillère afin d'assurer ses déplacements de va et vient sur le rail. A sa partie inférieure le chariot (8) comprend une barre horizontale de commande (10) qui comprend au moins un bras vertical (lia, 11 b) de retenue d'une pièce d'actionnement (12). Cette pièce d'actionnement est destinée à dégager par coulissement la cassette de pièces déjà traitées c'est-à-dire celles ayant fait un tour complet dans le liquide et engager la cassette suivante des pièces non encore traitées. La barre de commande est retenue à la partie inférieure du chariot par l'intermédiaire de deux biellettes pivotantes (17a, 17b), le pivotement des biellettes assurant le déplacement vertical de la barre. Grâce aux biellettes pivotantes (17a, 17b) la barre de commande se déplace vers le bas et vers le haut parallèlement à elle même.Each of the carriages (8) comprises a motor connected to a pinion cooperating with a rack to ensure its movements back and forth on the rail. At its lower part the carriage (8) comprises a horizontal control bar (10) which comprises at least one vertical arm (11a, 11b) for retaining an actuating piece (12). This actuating piece is intended to slide the cassette out of pieces already treated, that is to say those having made a complete revolution in the liquid and engage the next cassette parts not yet treated. The control bar is retained at the bottom of the carriage by means of two pivoting rods (17a, 17b), the pivoting rods ensuring the vertical movement of the bar. Thanks to the pivoting rods (17a, 17b) the control rod moves downwards and upwards parallel to itself.
Les figures 4 et 5 illustrent le fonctionnement d'un chariot mobile (8). Ainsi, comme cela est illustré à la figure 4, le chariot (8) en position de dégagement est tel que la barre horizontale (10) est en position haute de dégagement, ce qui permet au chariot de se déplacer vers l'amont de la chaîne, selon la flèche D, pour une nouvelle action. Une fois en position d'action, la barre horizontale est déplacée vers le bas, tel que cela est illustré à la figure 5, pour que la ou les pièces d'actionnement 12 puissent venir dans le plan des cassettes (5), puis le chariot (8) se déplace vers l'aval de la chaîne, selon la flèche (A), dans le sens inverse de celui du dégagement (D), afin d'engager dans la glissière (6) une nouvelle cassette, et faire progresser d'une position une cassette et/ou dégager la cassette de pièces déjà traitées. On observera que sur la figure 5, le bras vertical (l ia) pousse la cassette de gauche, alors que le bras vertical (Hb) simultanément tire la deuxième cassette et pousse la troisième cassette. L'homme du métier aura notamment déduit de la description ci-dessus que contrairement à la demande de brevet WO2006/00199, où il est prévu une double chaîne de convoyage qui est disposée latéralement et dont l'axe général s'étend perpendiculairement à l'axe de rotation des tambours, dans l'installation de l'invention la chaîne de convoyage (14) est disposée au-dessus des cuves, et l'axe général de convoyage est parallèle à l'axe de rotation des tambours et est disposé dans l'espace vertical (E) comprenant les cuves, et l'axe général de convoyage (Z, TI) est parallèle à l'axe de rotation des tambours, et avantageusement disposé dans le plan vertical (P) contenant l'axe de rotation (X, X') des tambours.Figures 4 and 5 illustrate the operation of a movable carriage (8). Thus, as shown in Figure 4, the carriage (8) in the release position is such that the horizontal bar (10) is in the upper release position, which allows the carriage to move upstream of the chain, according to the arrow D, for a new action. Once in the action position, the horizontal bar is moved downwards, as shown in FIG. 5, so that the actuating part (s) 12 can come into the plane of the cassettes (5), then the carriage (8) moves downstream of the chain, according to the arrow (A), in the opposite direction to that of the clearance (D), in order to engage in the slide (6) a new cassette, and to progress position a cassette and / or clear the cassette of parts already processed. It will be observed that in FIG. 5, the vertical arm (11a) pushes the left cassette, while the vertical arm (Hb) simultaneously pulls the second cassette and pushes the third cassette. The person skilled in the art will have notably deduced from the above description that contrary to the patent application WO2006 / 00199, where there is provided a double conveying chain which is arranged laterally and whose general axis extends perpendicular to the the axis of rotation of the drums, in the installation of the invention the conveyor chain (14) is disposed above the tanks, and the general conveying axis is parallel to the axis of rotation of the drums and is arranged in the vertical space (E) comprising the tanks, and the general conveying axis (Z, TI) is parallel to the axis of rotation of the drums, and advantageously arranged in the vertical plane (P) containing the axis of rotation. rotation (X, X ') of the drums.
Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et représenté à titre d'exemple, mais elle comprend de nombreuses variantes techniques ainsi que leurs combinaisons :Of course, the invention is not limited to the embodiment described and shown by way of example, but it comprises numerous technical variants as well as their combinations:
Ainsi, la figure 3 illustre un tambour avec six positions de fixation de cassettes. Ce nombre pourrait être différent. Avec par exemple seulement 2 positions de fixations, on peut réaliser une cuve de petite dimension nécessitant peu de liquide de traitement, en particulier pour une étape de traitement rapide. Dans ce cas, la structure du tambour n'est pas nécessairement cylindrique ou hexagonale mais peut se réduire à deux bras Ainsi, les durées respectives des étapes successives de traitement peuvent être modulées entre elles grâce à des nombres de positions de fixation différentes sur les tambours.Thus, Figure 3 illustrates a drum with six cassette attachment positions. This number could be different. With, for example, only two fixing positions, it is possible to make a small tank requiring little treatment liquid, in particular for a fast treatment stage. In this case, the structure of the drum is not necessarily cylindrical or hexagonal but can be reduced to two arms. Thus, the respective durations of the successive processing steps can be modulated with each other thanks to the number of different fixing positions on the drums. .
La chaîne de convoyage pourrait n'utiliser qu'un seul moteur, les mouvements de tous les chariots mobiles s'effectuant via un système d'entraînements mécaniques. Les cassettes citées ci-dessus conviennent particulièrement au traitement d'un grand nombre de pièces de petite dimension. Dans le cas du traitement de grandes pièces, celles-ci peuvent être fixées directement sur un tambour, ou par d'autres moyens de fixation que des glissières. The conveyor chain could use only one motor, the movements of all the mobile carriages taking place via a system of mechanical drives. The cassettes mentioned above are particularly suitable for processing a large number of small parts. In the case of the treatment of large parts, they can be fixed directly on a drum, or by other means of attachment as slides.

Claims

REVENDICATIONS
1. Installation de traitement de surfaces de pièces comprenant une pluralité de cuves de traitement (4) agencées en série, équipées de tambours (2) rotatifs munis de moyens de fixation temporaire de pièces à traiter, et dont les axes (XX") sont montés horizontalement en rotation de telle sorte que la majeure partie de chaque tambour (2) soit immergée dans un liquide de traitement (3) contenu dans la cuve correspondante, et une chaîne de convoyage (14) destinée à alimenter chaque tambour (2) en pièces à traiter et à retirer du dit tambour des pièces déjà traitées, caractérisée en ce que le dit convoyage s'effectue sur un axe général (ZZ"), que les axes (XX") des tambours sont parallèles entre eux et parallèles à l'axe général (ZZ") de la chaîne de convoyage.1. Apparatus for treating the surfaces of workpieces comprising a plurality of processing tanks (4) arranged in series, equipped with rotary drums (2) provided with means for temporarily fixing workpieces, and whose axes (XX ") are mounted horizontally in rotation so that the major part of each drum (2) is immersed in a treatment liquid (3) contained in the corresponding tank, and a conveyor chain (14) for feeding each drum (2) with parts to be treated and removed from said drum parts already treated, characterized in that said conveying is performed on a general axis (ZZ "), the axes (XX") of the drums are parallel to each other and parallel to the general axis (ZZ ") of the conveyor chain.
2. Installation de traitement de surface de pièces selon la revendication 1, caractérisée en ce que les axes de rotation (XX") des tambours sont agencés sensiblement dans le même plan vertical (P) et que l'axe général (ZZ") de la chaîne de convoyage est disposé dans le plan vertical contenant les axes de rotation des tambours.2. A surface treatment plant according to claim 1, characterized in that the axes of rotation (XX ") of the drums are arranged substantially in the same vertical plane (P) and that the general axis (ZZ") of the conveyor chain is arranged in the vertical plane containing the axes of rotation of the drums.
3. Installation de traitement de surface de pièces selon la revendication 1 ou 2, caractérisée en ce que la périphérie d' un tambour (2) comprend un ensemble de paires de glissières (6) ou de rails d'axe parallèle à l'axe de rotation du tambour, destinés à recevoir des cassettes (5) supportant un ensemble de pièces à traiter, les cassettes étant destinées à faire avec le tambour sur lequel elles sont fixées un ou plusieurs tours complets dans le liquide de traitement, que la chaîne de convoyage (14) est destinée à alimenter en cassettes de pièces à traiter le tambour et à retirer du tambour les cassettes de pièces déjà traitées, que la chaîne de convoyage est disposée au-dessus des cuves, et dans l'espace vertical comprenant les cuves.3. Apparatus for surface treatment of parts according to claim 1 or 2, characterized in that the periphery of a drum (2) comprises a set of pairs of rails (6) or rails of axis parallel to the axis. rotation of the drum, intended to receive cassettes (5) supporting a set of parts to be treated, the cassettes being intended to do with the drum on which they are fixed one or more complete turns in the treatment liquid, that the chain of conveying (14) is intended to supply cassettes of parts to be treated the drum and to remove from the drum the cassettes of parts already treated, the conveyor chain is disposed above the tanks, and in the vertical space comprising the tanks .
4. Installation de traitement de pièces selon la revendication 3, caractérisée en ce que les tambours sont agencés de sorte que leurs paires de glissières (6) qui viennent momentanément en position supérieure émergent des liquides des traitements et sont alignées les unes avec les autres. 4. Piece processing plant according to claim 3, characterized in that the drums are arranged so that their pairs of slides (6) which momentarily come to the upper position emerge from the treatment liquids and are aligned with each other.
5. Installation de traitement de pièces selon la revendication 3 ou 4, caractérisée en ce qu'elle comporte des glissières de transfert disposées entre deux cuves successives et alignées avec les glissières des tambours en position supérieure.5. Piece processing plant according to claim 3 or 4, characterized in that it comprises transfer slides disposed between two successive tanks and aligned with the slides of the drums in the upper position.
6. Installation de traitement de pièces selon la revendication 5, caractérisée en ce qu'elle comporte des moyens d'aspersion des pièces au niveau d'au moins une glissière de transfert.6. Piece processing plant according to claim 5, characterized in that it comprises means for spraying parts at at least one transfer slide.
7. Installation de traitement de pièces selon l'une des revendications précédentes, caractérisée en se ce que les opérations de transfert de pièces de la chaîne de convoyage sont cadencées et synchrones.7. Piece processing plant according to one of the preceding claims, characterized in that the transfer operations of parts of the conveyor chain are timed and synchronous.
8. Installation de traitement de surface de pièces selon l'une des revendications précédentes, caractérisée en ce que la chaîne de convoyage (14) comprend au moins un chariot mobile (8) en déplacement de va et vient sur un rail de guidage (9) effectuant par ce déplacement le dégagement d'une ou de plusieurs cassettes comprenant les pièces déjà traitées, et la mise en place d'une ou de plusieurs cassettes comprenant les pièces non encore traitées.8. Surface treatment plant according to one of the preceding claims, characterized in that the conveyor chain (14) comprises at least one movable carriage (8) moving back and forth on a guide rail (9). ) making by this displacement the release of one or more cassettes comprising the parts already treated, and the establishment of one or more cassettes comprising the parts not yet treated.
9. Installation de traitement de surface de pièces selon la revendication 8, caractérisée en ce que le chariot mobile (8) comprend un moteur relié à un pignon coopérant avec une crémaillère afin d'assurer ses déplacements de va et vient sur le rail.9. Room surface treatment installation according to claim 8, characterized in that the movable carriage (8) comprises a motor connected to a pinion cooperating with a rack to ensure its movements back and forth on the rail.
10. Installation de traitement de surface de pièces selon la revendication 9, caractérisée en ce que la partie inférieure du chariot (8) comprend une barre horizontale de commande (10) qui porte au moins un bras vertical (11 a, Hb) de retenue d'une pièce d'actionnement (12).10. A surface treatment plant according to claim 9, characterized in that the lower part of the carriage (8) comprises a horizontal control bar (10) which carries at least one vertical arm (11a, Hb) retaining an actuating part (12).
11. Installation de traitement de surface de pièces selon la revendication 10, caractérisée en ce que la barre de commande (10) est retenue à la partie inférieure du chariot par l'intermédiaire de deux biellettes pivotantes (17a, 17b), le pivotement des biellettes assurant le déplacement vertical de la barre. Surface treatment plant according to claim 10, characterized in that the control rod (10) is retained at the bottom of the carriage by via two pivoting rods (17a, 17b), the pivoting rods ensuring the vertical movement of the bar.
EP07825173A 2006-09-22 2007-09-24 Equipment for the surface treatment of parts by immersion in a processing liquid Active EP2064373B1 (en)

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FR0608407A FR2906265B1 (en) 2006-09-22 2006-09-22 INSTALLATION FOR PROCESSING THE SURFACE OF PIECES BY IMMERSION IN A TREATMENT FLUID.
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RU2009115204A (en) 2010-10-27
FR2906265A1 (en) 2008-03-28
JP4588797B2 (en) 2010-12-01
US8871065B2 (en) 2014-10-28
JP2010504429A (en) 2010-02-12
FR2906265B1 (en) 2008-12-19
ES2343597T3 (en) 2010-08-04
CA2662756C (en) 2011-03-22
EP2064373B1 (en) 2010-04-21
WO2008035199A2 (en) 2008-03-27
WO2008035199A3 (en) 2008-11-06
KR101163203B1 (en) 2012-07-05
US20100024852A1 (en) 2010-02-04
BRPI0716913A2 (en) 2014-07-01
ATE465285T1 (en) 2010-05-15
CN101517133A (en) 2009-08-26
RU2415203C2 (en) 2011-03-27
DE602007006030D1 (en) 2010-06-02
MX2009003094A (en) 2009-05-11
CN101517133B (en) 2011-01-19
KR20090053962A (en) 2009-05-28
PL2064373T3 (en) 2010-09-30
CA2662756A1 (en) 2008-03-27

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