EP0524866A1 - Elektrolytische Anlage, insbesondere zum Lackieren einer Autokarosserie mittels Kataphorese - Google Patents

Elektrolytische Anlage, insbesondere zum Lackieren einer Autokarosserie mittels Kataphorese Download PDF

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Publication number
EP0524866A1
EP0524866A1 EP92402086A EP92402086A EP0524866A1 EP 0524866 A1 EP0524866 A1 EP 0524866A1 EP 92402086 A EP92402086 A EP 92402086A EP 92402086 A EP92402086 A EP 92402086A EP 0524866 A1 EP0524866 A1 EP 0524866A1
Authority
EP
European Patent Office
Prior art keywords
hanger
sledge
contact
installation according
contact elements
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
EP92402086A
Other languages
English (en)
French (fr)
Other versions
EP0524866B1 (de
Inventor
François Rebuffat
André Briand
Alain Riviere
Roger Herrouin
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0524866A1 publication Critical patent/EP0524866A1/de
Application granted granted Critical
Publication of EP0524866B1 publication Critical patent/EP0524866B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/22—Servicing or operating apparatus or multistep processes

Definitions

  • the present invention relates to an electrolytic installation in particular for painting a motor vehicle body by cataphoresis.
  • the known methods of obtaining a coating of paint by electrophoresis (electrodeposition) on a bodywork of a motor vehicle consist in immersing the body of a vehicle in a tank containing a bath of an electrically conductive paint, having introduced in this same bath two electrodes (respectively anode and cathode) of a direct current generator, the cathode being connected to the vehicle body in the case where the paint used is of the cationic type.
  • the paint coating is obtained by displacement of the paint particles towards the vehicle body, under the effect of the electric field produced by said generator.
  • This process has a certain number of known advantages due to the fact in particular on the one hand, that it lends itself to automation, on the other hand that the paint can access the interior parts of the bodywork and that it is constantly renewed by an equivalent quantity as and when it is applied.
  • the implementation of this method is carried out in a manner known per se, by means of an installation comprising a conveyor driving one or more hangers moving on rails, and intended to transport a sledge supporting the body of the vehicle towards the tank containing the paint bath.
  • the deposition of a layer of paint on a vehicle by this process requires the body of said vehicle to be connected to the negative pole of the current generator and generally to ground; what is done, in order to avoid unwanted traces left on the bodywork, rather by bringing the sledge to earth via a mechanism fixed to the base of the hanger and comprising two contact elements connected respectively to the sledge and to one or more hangers.
  • the path of the hangers on the rails is not continuously rectilinear and has curves corresponding to the descent and ascent of the boxes in the paint bath, on the other hand, that the aforementioned mechanism will be immersed during the passage in the bath. From these two considerations it follows that the aforementioned contact must fulfill certain conditions. It will be necessary that the two aforementioned contact elements are clean and fixed with respect to each other, and particularly during the descents and ascent of vehicles in order to avoid the appearance of electric arcs which can go so far as to cause unwanted welds. It will therefore be desirable for a minimum of mobile connections between the parts to be made, but nevertheless for a clearance to remain between these elements to allow the paint to be removed in order to prevent the risks of blockage of the current flow.
  • the present invention aims to solve these problems and provides an electrolytic installation, in particular for painting a motor vehicle body by cataphoresis, of easy design, and allowing transmission of the current between the hanger (s) and the sledge in particular. reliable, avoiding the use of devices for cleaning the electrical contact elements conventionally required in such installations.
  • the subject of the present invention is an electrolytic installation, in particular for painting a motor vehicle body by cataphoresis, of the type comprising a sledge on which a motor vehicle body is transported in electrical contact with said sledge, at least one hanger to which said luge can be suspended in an articulated manner, said hanger being moved by a conveyor to transport said luge to a station at which it enters at a certain inclination into a cataphoresis bath by pivoting around the hanger, said luge being electrically connected to one of the poles of a current source by establishing an electrical contact between two electrical contact elements connected respectively to the sledge and the hanger, in the loaded position of the sledge on the hangers, one of the two the aforementioned elements retracting to allow the loading of the sledge on the hanger, this installation being characterized in that at least one of the two aforementioned contact elements comprises an elastic means permanently applying the two contact elements one pressing against the other in the loaded position of the sledge by pushing
  • one of the aforementioned contact elements is mounted to rotate relative to the axis around which the sledge pivots relative to the hanger and the aforementioned securing means is a means for securing the two in rotation aforementioned items.
  • the contact element supported by the hanger is integral with a sleeve rotatably mounted around the pivot axis of the sledge relative to the hanger, said sleeve comprising two fingers capable of coming into contact with part of the sledge to secure in rotation the two contact elements.
  • the aforementioned part of said sledge is the electrical contact element integral with the sledge itself.
  • At least one of the abovementioned contact elements comprises at least one strip made of an elastic and conductive material.
  • the two aforementioned contact elements are formed for the first of several parts, and for the second of a part, said parts each comprising at least one edge, the two contact elements being applied one against the other. the other by means of a spring, the respective edges of the parts of the first and of the second contact element being pickled by friction against one another when the sledge is loaded on the hanger.
  • the edges of the two aforementioned contact elements having different inclinations.
  • the parts of the first contact element comprise a chamfered part cooperating with a corresponding chamfered part of the other part of the second contact element favoring the retraction of one of the contact elements during the positioning of the sledge on the hanger.
  • one of the aforementioned contact elements is connected to the current source by means of a flexible element allowing a current transmission during the rotation of the sledge relative to the hanger.
  • this flexible element is a braid or a cable.
  • the return spring of at least one of the contact elements after each operation is secured by one of its ends to the upper part of the hanger and by its other end to an intermediate piece support on which is fixed the contact element supported by the hanger and recalls one of the contact elements in the engagement position with the other contact element before loading a sledge.
  • said installation comprises means for checking the presence of the spring.
  • These means comprise a pendulum presence sensor and a spring presence sensor, and means for verifying the synchronization of the signals emitted by said sensors, activated at the start of the return circuit of the pendants.
  • the installation further comprises a means for controlling the continuity of the flow of current between two hangers.
  • This means comprises an additional rail on which engages one of the rear hangers when one of the front hangers is in guided contact with a front rail connected to said current source, a device for subjecting the additional rail to a direct voltage. and a device for checking the passage of current in the circuit thus created.
  • Figure 1 is a partial front view in section, illustrating an electrolytic installation according to an embodiment of the invention, for the painting of a motor vehicle body.
  • Figure 2 is a sectional view along II-II of the previous figure, illustrating the hanger without the sledge.
  • Figure 3 is a view similar to Figure 1, but illustrating a second embodiment of the means of transmission of electric current between hanger and sledge.
  • Figure 4 is a sectional view along IV-IV of Figure 3, similar to Figure 2, but illustrating a second embodiment of the current transmission device between hanger and sledge.
  • Figures 5 and 6 are side views of the electrical contact elements according to the embodiment illustrated in Figures 3 and 4, while Figures 7 and 8 are respectively front views.
  • FIG. 9 is a partial schematic view of a hanger of an electrolytic installation equipped with a device for checking the presence of the return spring of the contact element in the initial position
  • Figure 10 is a schematic representation illustrating two hangers moved along the guide rails, and a system for monitoring the continuity of the flow of current.
  • FIGS. 1 and 2 we see a part of the electrolytic installation I of the invention for the transport of a vehicle body in a tank (not shown in this figure) for painting said body by plating.
  • This installation I comprises for each operation on the one hand, four hangers 1 (of which only one is shown in this figure) moving by their upper ends on guide rails when driven by a conveyor (not shown), and a sledge 2 suspended from the above-mentioned hangers (the hanger is moved perpendicular to the plane of the figure).
  • Each aforementioned hanger 1 comprises a vertical element 10 and a horizontal element 11 forming an axis of articulation on which axis 11 said sledge 2 is pivotally mounted.
  • a support piece 12 to which is connected perpendicularly, by means of a screw 120 and nut 121 assembly, one of the ends 30 of a braid 3 of which the other end 31 is secured, also by means of a screw 43 and nut 42 system, to a bracket 4 for connecting said braid 3 to an intermediate support piece 5 of a contact element 7, said intermediate piece 5 being integral with a sleeve 8 rotatably mounted on another sleeve 111 integral with the axis forming part 11 of the hanger 1.
  • a braid it is advantageous to use a flexible cable with metal lugs. As for parts 5 and 8, they must be made of insulating material.
  • the aforementioned contact element 7, supported by the hanger 1, is constituted according to this particular embodiment by four spring blades 70 fixed to a metal part 5b by bolts 79 or screws placed from the outside, the part 5b being itself fixed on part 5 by screws 5a, the upper part of the intermediate part 5 being further connected by means of a second bracket 40 to a return spring 41 whose function will be explained later and one end 411 of which is engaged in an orifice provided in said bracket 40 while the other end 412 is suspended from the support piece 12 fixed to the upper part of the hanger 1.
  • the spring can also be held by pins on the parts 5 and 12.
  • the sleeve 111 fixed on and surrounding the part of the hanger 1 forming a hinge pin 11 is formed from three parts of different diameters 111a, 111b, 111c; the sleeve 8 is pivotally mounted around the middle part 111b having the smallest diameter and has on its face oriented towards the sledge 2 two fingers 80 incorporated and arranged on either side of the aforementioned sleeve 111.
  • the intermediate support part 5, the electrical contact element 7 and the rotary sleeve 8 and its incorporated fingers 80 are integral in rotation around the fixed sleeve 111 and the axis 11 of the hanger 1.
  • the axis forming part 11 of the hanger I is intended, as already mentioned, to support the sledge 2 on which the vehicle body will be placed.
  • This sledge 2 consists of a pallet which can pivot around the axes of the hanger 1, and which comprises on one of its sides two electrical contact plates 9 intended to cooperate with the aforementioned strips 70 of two hangers 1 opposite this side of the sledge 2.
  • the electrical contact element 7 supported by the hanger 1 (see also Figures 5, 6, 7 and 8) consists of four parts 71 , 72, 73, 74 of substantially trapezoidal section in contact with an intermediate support part by their side of greater length, and mounted against a spring (not shown) applying them to the other contact element 94 integral with the sledge 2.
  • These four parts comprise, on the side opposite to the intermediate support, projecting elements forming ridges 75 parallel to one another, inclined relative to the base of said parts.
  • the contact element (FIG. 6 and FIG. 8) intended to be supported by the sledge 2, for its part, consists of a part 94 of substantially rectangular shape fixed to the sled 2 and also comprising on its face opposite to the sled 2 projecting elements forming edges 91.
  • the upper part of the part forming the first contact element 7 mentioned above is chamfered (a) to cooperate with another chamfer (b) provided at the bottom of the other contact element 94 in the manner which will be described further on in the description.
  • the sledge 2, on which the vehicle body is placed, is transported firstly above the parts forming the axis 11 of the four hangers 1; then a table (not shown) ensuring the transport of said luge 2, lowers the luge on the hangers with the effect of suspending said luge from said hanger.
  • the electrical contact plate 9 of the sledge 2 compresses the elastic strips 7 thus establishing electrical contact with the mass conveyed from a cable running along the upper part of the hangers 1 and passing respectively through the screws and nuts 120, 121, 43, 42, the braid 3, the bracket 4, the screws 5a and the part 5b.
  • the hangers 1 are moved by a conveyor along guide rails 50 (see FIG.
  • the unloading of the sledge 2 from the hangers 1 it is obtained by raising the sledge 2 by means of the lifting table, which produces the decompression of the strips 70 with the plate 90, the sleeve assembly 8, intermediate piece 5, strips 70, braid 3, being returned to the vertical position by the spring 41 in the perspective of a new loading.
  • the pickling is carried out automatically, only on the strips 70 during loading, the plate 9 secured to the sledge 2 requiring pickling by shot blasting.
  • the strips 70 are preferably made of treated stainless steel to have a low elasticity and therefore easy automatic pickling.
  • the means of transmitting the mass to the sledge 2 according to the second embodiment operates in the same manner as previously described. Loading the sledge 2 on the hanger 1 produces the engagement of the two chamfers (a) (b) provided respectively at the upper parts of the contact parts 71, 72, 73 and 74 and at the lower part of the other part 94 , this resulting in the displacement of the aforementioned parts 71, 72, 73, 74 against the aforementioned spring, which makes it possible to press parts 71, 72, 73, 74 against part 94.
  • the contact parts 71, 72, 73, 74 are made of tungsten carbide to withstand the scraping of the cooked cataphoresis and the high intensity of the electrodeposition current (750 A max. ).
  • the control of the continuous flow of current between the hanger and the sledge is carried out as follows.
  • the hanger 1 engages on a grounding rail 52 while the rear hangers 13 engage on a control rail 53 which is measured the voltage (figure 10).
  • This control is carried out via a stabilized supply U, for example 24 VDC and a threshold voltage relay R.
  • the state of relay R is scanned throughout the duration of the control by an automaton A. Any fault detected triggers the memorization M of the image of the number of the rear hanger incriminated 13; this number is then displayed (E) in the cockpit where it triggers an alarm which alerts a maintenance team.
  • the presence of the spring 41 is checked, essential for the slinging to be accomplished satisfactorily.
  • This control is implemented by means of two vane sensors 16, 15 in the start of the return circuit of the hangers 1, which hangers are equipped with earthing systems and can move in the vertical position.
  • the pivoting of the pallets 15, 16 when the spring 41 and the upper part of the hanger pass respectively generates a signal, any desynchronization between the state of the two sensors 16, 15 triggering an alarm memorized in the flight hall intended to warn a support team.
  • the parts 8, 111, 12 will advantageously be made of a plastic material in order to prevent the hanger from being grounded, on the other hand that the contact elements will preferably be arranged on one side of the sleds to facilitate installation, and that the conductive surfaces in contact with the bath will be protected by a deposit of cooked cataphoresis.
  • an electrolytic installation has therefore been produced, in particular for painting a motor vehicle body by cataphoresis, eliminating the risks of production of electric arcs between the respective contact elements of the hanger and the sledge, thanks to a contact permanent throughout the duration of the electrodeposition Due to the elastic connection and the rotational attachment, not requiring a particular quality of surface condition as is the case with the magnet, while compensating for dimensional variations sleds, and not requiring the establishment of chemical pickling stations requiring maintenance, use and treatment of mandatory and expensive chemicals.
  • the invention includes all the technical equivalents of the means described and their combinations if these are carried out according to his mind.
  • it does not only apply to cases of motor vehicles, but can be used for the treatment of a basket of spare parts for example.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating Apparatus (AREA)
  • Springs (AREA)
  • Chain Conveyers (AREA)
EP19920402086 1991-07-23 1992-07-17 Elektrolytische Anlage, insbesondere zum Lackieren einer Autokarosserie mittels Kataphorese Expired - Lifetime EP0524866B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9109300A FR2679572B1 (fr) 1991-07-23 1991-07-23 Installation electrolytique, notamment pour peindre une caisse de vehicule automobile par cataphorese.
FR9109300 1991-07-23

Publications (2)

Publication Number Publication Date
EP0524866A1 true EP0524866A1 (de) 1993-01-27
EP0524866B1 EP0524866B1 (de) 1996-03-20

Family

ID=9415438

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Application Number Title Priority Date Filing Date
EP19920402086 Expired - Lifetime EP0524866B1 (de) 1991-07-23 1992-07-17 Elektrolytische Anlage, insbesondere zum Lackieren einer Autokarosserie mittels Kataphorese

Country Status (4)

Country Link
EP (1) EP0524866B1 (de)
DE (1) DE69209177T2 (de)
ES (1) ES2087479T3 (de)
FR (1) FR2679572B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2056015A1 (es) * 1991-02-02 1994-09-01 Duerr Gmbh & Co Dispositivo de limpieza para un elemento de contacto en forma de nervio o de costilla (espadin de contacto) de un carro portacarrocerias.
FR2742770A1 (fr) * 1995-12-21 1997-06-27 Peugeot Dispositif de distribution d'electricite par contact glissant
EP1453694A1 (de) * 2001-11-21 2004-09-08 Peugeot Citroen Automobiles SA Kraftübertragungsvorrichtung mit mindestens zwei planetengetriebezügen
FR2877242A1 (fr) * 2004-11-04 2006-05-05 Renault Sas Support de pieces a peindre.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0371900A1 (de) * 1988-11-28 1990-06-06 Air Industrie Systemes Elektrotauchlackieranlage für Kraftfahrzeugkarosserien

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0371900A1 (de) * 1988-11-28 1990-06-06 Air Industrie Systemes Elektrotauchlackieranlage für Kraftfahrzeugkarosserien

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2056015A1 (es) * 1991-02-02 1994-09-01 Duerr Gmbh & Co Dispositivo de limpieza para un elemento de contacto en forma de nervio o de costilla (espadin de contacto) de un carro portacarrocerias.
FR2742770A1 (fr) * 1995-12-21 1997-06-27 Peugeot Dispositif de distribution d'electricite par contact glissant
EP1453694A1 (de) * 2001-11-21 2004-09-08 Peugeot Citroen Automobiles SA Kraftübertragungsvorrichtung mit mindestens zwei planetengetriebezügen
EP1453694B1 (de) * 2001-11-21 2006-03-01 Peugeot Citroen Automobiles SA Kraftübertragungsvorrichtung mit mindestens zwei planetengetriebezügen
FR2877242A1 (fr) * 2004-11-04 2006-05-05 Renault Sas Support de pieces a peindre.
WO2006048569A2 (fr) * 2004-11-04 2006-05-11 Renault S.A.S Support de pieces a peindre
WO2006048569A3 (fr) * 2004-11-04 2008-02-28 Renault Sa Support de pieces a peindre
CN101194050B (zh) * 2004-11-04 2011-01-05 雷诺两合公司 用于要涂覆的部件的保持器

Also Published As

Publication number Publication date
EP0524866B1 (de) 1996-03-20
ES2087479T3 (es) 1996-07-16
DE69209177T2 (de) 1996-10-24
FR2679572B1 (fr) 1993-12-17
FR2679572A1 (fr) 1993-01-29
DE69209177D1 (de) 1996-04-25

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