EP0687578A1 - Device for marking thin plates, in particular for body sheets in the vehicle industry - Google Patents

Device for marking thin plates, in particular for body sheets in the vehicle industry Download PDF

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Publication number
EP0687578A1
EP0687578A1 EP95401419A EP95401419A EP0687578A1 EP 0687578 A1 EP0687578 A1 EP 0687578A1 EP 95401419 A EP95401419 A EP 95401419A EP 95401419 A EP95401419 A EP 95401419A EP 0687578 A1 EP0687578 A1 EP 0687578A1
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EP
European Patent Office
Prior art keywords
carriage
wheel
marked
pattern
engraved
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.)
Withdrawn
Application number
EP95401419A
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German (de)
French (fr)
Inventor
John Tissiman
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.)
MECAGRAV INDUSTRIE
Original Assignee
MECAGRAV INDUSTRIE
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 MECAGRAV INDUSTRIE filed Critical MECAGRAV INDUSTRIE
Publication of EP0687578A1 publication Critical patent/EP0687578A1/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B44DECORATIVE ARTS
    • B44BMACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02Dies; Accessories
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B44DECORATIVE ARTS
    • B44BMACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/0076Machines or apparatus for embossing decorations or marks, e.g. embossing coins having a series of embossing tools each of which can be brought into working position

Definitions

  • the present invention relates to a device for marking thin metal parts, in particular sheets for the automotive industry.
  • this marking must withstand the manufacturing steps to which the part which has been marked is subjected.
  • a marking device is already known in which an engraved plate comprising an embossed pattern is applied by force against a thin part of the part to print said pattern on it.
  • This known device has the major drawback that it requires a very large power to apply the engraved plate against the part to be marked, which poses problems of cost and ease of handling the device.
  • a device for marking thin metal parts in particular sheets for the automotive industry, comprising a chassis provided with means of attachment to a metal part to be marked, a first carriage, movable in translation on the chassis parallel to the surface of the part to be marked, and a second carriage, supporting a wheel which comprises, at its periphery, a plurality of plates each engraved with a pattern, said wheel being rotatably mounted on the second carriage around an axis parallel to the plane of the surface of the workpiece to be marked, and being capable of bringing one of its engraved plates facing the surface of the workpiece to be marked, said second carriage being movable by relation to the first carriage between a rest position in which the wheel is moved away from the surface of the part to be marked and a printing position in which the wheel applies said engraved plate against the surface of the part to be marked, exerting sufficient pressure to print the pattern.
  • the selection of a pattern is carried out by rotation of the wheel and the printing of the pattern is carried out by translation of the second carriage carrying said wheel in a direction perpendicular to the surface of the part to be marked.
  • This device operates in the following manner.
  • the first carriage is then placed in the starting position, at one end of its translation travel parallel to the surface of the part to be marked.
  • the second carriage being in the rest position, the engraved plate comprising the first pattern to be printed is brought opposite the surface of the part to be marked by rotation of the wheel.
  • the second carriage is then moved in translation towards the surface of the part to be marked, it then takes its printing position in which the engraved plate of the wheel exerts sufficient pressure on the part to be marked to print the desired pattern there. .
  • the second carriage is then returned to the rest position by a translational movement opposite to the previous one.
  • the first carriage can then be moved by a distance corresponding to the width of a pattern, possibly increased by a desired spacing between two successive patterns, then, by rotation of the dial and translation of the second carriage, a second pattern is printed. on the surface of the part to be marked.
  • This known device nevertheless has certain drawbacks.
  • the present invention aims to provide a device for marking thin metal parts, in particular sheet metal for the automotive industry, which does not in particular have this drawback.
  • the present invention is characterized by the fact that the force exerted on the dial, when printing a pattern, is adjusted to a constant value, sufficient to print the most complex pattern, and by the fact that each engraved plate of the wheel has a flat base surface, from which a pattern projects, and which serves as a stop limiting the insertion of said plate into the surface of the part to be marked.
  • the chassis includes operating handles and is suspended from a winch with constant torque which allows it to move in space.
  • the device according to the invention is connected to an electronic control cabinet which controls the various organs of the device according to the desired marking.
  • this control cabinet can control the attachment of the chassis to the part to be marked, the movement of the first carriage, the rotation of the wheel, and the translation of the second carriage for printing a pattern.
  • an operator In the marking station of a motor vehicle production line in FIG. 1, an operator 1, standing in front of a vehicle 2, manipulates a device 3 according to the invention.
  • the device 3 is suspended by a cable 4 from a constant torque winch 5 which allows the operator 1 to raise or lower the device 3 at will.
  • the winch 5 is mounted on a rail system 6 which allows it to be moved in all directions.
  • An electrical harness connects the device 3 to a control cabinet 7, while hydraulic lines, not shown, connect the device 3 to a hydraulic unit 8.
  • the device 3 is shown in section in FIG. 2, apart from the lifting member and the handles that can be seen in FIG. 1.
  • the device comprises a chassis 9, a first carriage 10 movable relative to the chassis 9 in the direction X and a second carriage 11 movable relative to the first carriage 10 in the direction Y.
  • Slides 12 allow the first carriage 10 to slide relative to the chassis 9.
  • the movement of the first carriage 10 is provided by an electric stepper motor 13, which is mounted on the frame 9, and whose rotation shaft is integral with a threaded rod 14, which cooperates with a thread, not shown, provided in the first carriage 10.
  • Presence detectors 15 make it possible to detect the arrival at the end of the travel of the first carriage 10.
  • a thumbwheel 16 is mounted, the periphery of which supports a plurality of plates engraved with different patterns.
  • the thumbwheel 16 is rotatably mounted around an axis 17 which is perpendicular to the directions of movement X of the first carriage 10 and Y of the second carriage 11.
  • a second electric motor 18 is housed on the second carriage 11 above the wheel 16, and allows, via a drive mechanism 19, to rotate said wheel 16 to bring an engraved plate bearing a pattern desired at its bottom.
  • a hydraulic cylinder 20, mounted at the top of the first carriage 10 is able to move the second carriage 11 along slides 21 which are visible in FIG. 4.
  • the device comprises a jaw 22 articulated on the chassis 9 around an axis 23 parallel to the direction X of movement of the first carriage 10.
  • the jaw 22 is located below the first carriage 10, and supports a reaction "pile" 23 placed opposite the lower part of the wheel 16.
  • a toggle mechanism 24, actuated by a jack, not shown, makes it possible to move the jaw 22 between an open position, which is shown in broken lines in FIG. 2, and a closed position, shown in solid lines, in which it achieves the attachment of the device according to the invention to the metal part to be marked.
  • the chassis 9 includes stops 25 against which the metal part comes to bear while being pinched between its stops 25 and the reaction pile 23.
  • the operation of the device is as follows.
  • the jack 20 is then actuated to lower the second carriage 11 downward, so as to apply the desired engraved plate against the metal part.
  • FIG. 5 shows a metal part 26 trapped between a plate 27 of the thumb wheel 16 and the reaction "pile" 23.
  • the pressure exerted by the jack 20 is advantageously adjusted so as to correspond to the pressure necessary to print the most complex pattern of all those which are carried by the wheel 16.
  • each engraved plate has a flat base surface 28 which limits its sinking, as seen in FIG. 5.
  • the device comprises a locking member of the wheel, which automatically immobilizes the latter in its current angular position, when the second carriage moves from its rest position to its printing position.
  • the blocking member is constituted by a lever 29, visible in FIG. 2, which is articulated on the second carriage 11 around an axis perpendicular to the movement of the latter and projects from the face of this second carriage 11 adjacent to the first carriage 10.
  • a cam 30 projecting from this face of the first carriage 10 cooperates with the lever 29.
  • the cam 30 pivots the lever 29, which causes its lug 29 a to engage in a not shown groove provided for this purpose on the thumbwheel 16.
  • the second carriage 11 rises to the rest position and the motor 13 moves the carriage 10 a distance slightly greater than the width of a pattern.
  • a second pattern can thus be printed on the metal part 26, next to the first pattern, by repeating the operations described above.
  • the patterns are successively printed on the surface of the metal part, without the jaw 22 being unlocked from its hooking position on the metal part 26.
  • the device according to the invention has the essential advantage that it allows the printing of markings of different lengths always using the same printing power.
  • Figures 6 and 7 show the drive mechanism 19.
  • the drive mechanism 19 also comprises two safety members 36 and 37 which have the role of constantly monitoring the correct tension of the belts 33 and 35.
  • Each safety member comprises a lever 38 mounted pivoting about an axis 39 perpendicular to the plane of the belts.
  • the lever 38 comprises, in its middle part, a caster 40 carried by an axis 41 also perpendicular to the plane of the belts.
  • a torsion spring 42 exerts a torque on the lever 38 in the direction of support of the caster 40 on the corresponding belt 33 or 35.
  • each lever 38 When the belts are properly tensioned, the end of each lever 38 is situated opposite a corresponding proximity sensor 43, 44.
  • the proximity sensor 43, 44 detects the presence of the end of the lever 38, it is understood that the belts 33 and 35 are suitably tensioned.
  • the lever 38 pivots about its axis 39 and the corresponding proximity sensor 43,44 signals this anomaly to the operator and / or to a safety device which neutralizes the operation of the device according to the invention.

Landscapes

  • Straightening Metal Sheet-Like Bodies (AREA)
  • Printers Characterized By Their Purpose (AREA)

Abstract

The marker consists of a frame (9) equipped with a gripper (22) for the sheet metal component to be marked, a first carriage (10) which travels along the frame (9) parallel to the component's surface, and a second carriage (11) with a marking wheel (16) which has a series of engraves plates round its rim. The marking wheel is rotatable on the second carriage about a shaft (17) lying parallel to the surface of the component to be marked, so that the appropriate engraved plate can be positioned against it. The force applied by the marking wheel is regulated to a level which is sufficient to imprint the desired motif, with each engraved plate having a flat base surface from which the motif projects and which acts as a stop to limit penetration into the component being marked. The marking wheel is rotated by a step motor (18) through a drive mechanism (19) with reduction gears.

Description

La présente invention concerne un dispositif de marquage de pièces métalliques minces, notamment de tôles pour l'industrie automobile.The present invention relates to a device for marking thin metal parts, in particular sheets for the automotive industry.

Le marquage de produits industriels, en particulier de tôles de véhicules automobiles, est une nécessité de plus en plus répandue pour lutter notamment contre le vol.The marking of industrial products, in particular of sheet metal for motor vehicles, is an increasingly widespread necessity in order to combat theft in particular.

Dans cette optique, il est nécessaire de réaliser sur chaque pièce un marquage qui soit à la fois lisible et difficilement falsifiable.With this in mind, it is necessary to make a marking on each part which is both readable and difficult to falsify.

En outre, ce marquage doit résister aux étapes de fabrication auxquelles est soumise la pièce qui a été marquée.In addition, this marking must withstand the manufacturing steps to which the part which has been marked is subjected.

On connaît déjà un dispositif de marquage dans lequel une plaque gravée comportant un motif en relief est appliquée à force contre une partie mince de la pièce pour y imprimer ledit motif.A marking device is already known in which an engraved plate comprising an embossed pattern is applied by force against a thin part of the part to print said pattern on it.

Ce dispositif connu présente l'inconvénient majeur qu'il requiert une puissance très importante pour appliquer la plaque gravée contre la pièce à marquer, ce qui pose des problèmes de coût et de facilité de manipulation du dispositif.This known device has the major drawback that it requires a very large power to apply the engraved plate against the part to be marked, which poses problems of cost and ease of handling the device.

En outre, en fonction de la taille du motif, la pression à appliquer sur la plaque gravée diffère considérablement, ce qui limite les possibilités de marquage.In addition, depending on the size of the pattern, the pressure to be applied to the engraved plate differs considerably, which limits the possibilities of marking.

On connaît par ailleurs, de US-A-4 431 321, un dispositif pour le marquage de pièces métalliques minces, notamment de tôles pour l'industrie automobile, comportant un châssis muni de moyens d'accrochage à une pièce métallique à marquer, un premier chariot, mobile en translation sur le châssis parallèlement à la surface de la pièce à marquer, et un second chariot, supportant une molette qui comporte, à sa périphérie, une pluralité de plaquettes gravées chacune d'un motif, ladite molette étant montée rotative sur le second chariot autour d'un axe parallèle au plan de la surface de la pièce à marquer, et étant apte à amener l'une de ses plaquettes gravées en regard de la surface de la pièce à marquer, ledit second chariot étant mobile par rapport au premier chariot entre une position de repos dans laquelle la molette est écartée de la surface de la pièce à marquer et une position d'impression dans laquelle la molette applique ladite plaquette gravée contre la surface de la pièce à marquer, en exerçant une pression suffisante pour imprimer le motif.Also known from US-A-4,431,321 is a device for marking thin metal parts, in particular sheets for the automotive industry, comprising a chassis provided with means of attachment to a metal part to be marked, a first carriage, movable in translation on the chassis parallel to the surface of the part to be marked, and a second carriage, supporting a wheel which comprises, at its periphery, a plurality of plates each engraved with a pattern, said wheel being rotatably mounted on the second carriage around an axis parallel to the plane of the surface of the workpiece to be marked, and being capable of bringing one of its engraved plates facing the surface of the workpiece to be marked, said second carriage being movable by relation to the first carriage between a rest position in which the wheel is moved away from the surface of the part to be marked and a printing position in which the wheel applies said engraved plate against the surface of the part to be marked, exerting sufficient pressure to print the pattern.

La sélection d'un motif s'effectue par rotation de la molette et l'impression du motif s'effectue par translation du second chariot portant ladite molette selon une direction perpendiculaire à la surface de la pièce à marquer.The selection of a pattern is carried out by rotation of the wheel and the printing of the pattern is carried out by translation of the second carriage carrying said wheel in a direction perpendicular to the surface of the part to be marked.

Ce dispositif fonctionne de la manière suivante.This device operates in the following manner.

Il est tout d'abord accroché à la pièce à marquer par ses moyens d'accrochage.It is first of all attached to the part to be marked by its attachment means.

Le premier chariot est ensuite placé en position de départ, à l'une des extrémités de sa course de translation parallèle à la surface de la pièce à marquer.The first carriage is then placed in the starting position, at one end of its translation travel parallel to the surface of the part to be marked.

Le second chariot étant en position de repos, la plaquette gravée comportant le premier motif à imprimer est amenée en regard de la surface de la pièce à marquer par rotation de la molette .The second carriage being in the rest position, the engraved plate comprising the first pattern to be printed is brought opposite the surface of the part to be marked by rotation of the wheel.

Le second chariot est ensuite déplacé en translation en direction de la surface de la pièce à marquer, il prend alors sa position d'impression dans laquelle la plaquette gravée de la molette exerce une pression suffisante sur la pièce à marquer pour y imprimer le motif désiré.The second carriage is then moved in translation towards the surface of the part to be marked, it then takes its printing position in which the engraved plate of the wheel exerts sufficient pressure on the part to be marked to print the desired pattern there. .

Le second chariot est ensuite replacé en position de repos par un mouvement de translation inverse au précédent.The second carriage is then returned to the rest position by a translational movement opposite to the previous one.

Le premier chariot peut alors être déplacé d'une distance correspondant à la largeur d'un motif, éventuellement augmentée d'un espacement désiré entre deux motifs successifs, puis, par rotation de la molette et translation du second chariot, un deuxième motif est imprimé sur la surface de la pièce à marquer.The first carriage can then be moved by a distance corresponding to the width of a pattern, possibly increased by a desired spacing between two successive patterns, then, by rotation of the dial and translation of the second carriage, a second pattern is printed. on the surface of the part to be marked.

En répétant plusieurs fois ces opérations, on peut successivement imprimer sur la pièce à marquer différents motifs contigüs pour former un marquage constitué d'un nombre de motifs variable.By repeating these operations several times, it is possible to successively print on the part to be marked different contiguous patterns to form a marking consisting of a variable number of patterns.

Ce dispositif connu présente néanmoins certains inconvénients.This known device nevertheless has certain drawbacks.

Parmi ceux-ci, on peut citer notamment le fait que la molette est appliquée contre la surface de la pièce à marquer avec une force sensiblement constante, quel que soit le motif à imprimer.Among these, there may be mentioned in particular the fact that the wheel is applied against the surface of the part to be marked with a substantially constant force, whatever the pattern to be printed.

Or, selon que l'on imprime un motif simple, c'est-à-dire comportant peu de formes en relief, ou un motif complexe, c'est-à-dire comportant de nombreuses formes en relief, la force nécessaire à l'impression du motif varie.However, depending on whether a simple pattern is printed, that is to say comprising few relief shapes, or a complex pattern, that is to say comprising many relief shapes, the force necessary for the the pattern varies.

De ce fait, si l'on applique une force constante, la profondeur de l'impression varie d'un motif à un autre, ce qui conduit à des impressions irrégulières, de moindre qualité que si l'on utilisait une plaque gravée comportant tous les motifs à imprimer simultanément.Therefore, if a constant force is applied, the depth of the print varies from one pattern to another, which leads to irregular prints, of lower quality than if one used an engraved plate comprising all patterns to print simultaneously.

La présente invention vise à fournir un dispositif de marquage de pièces métalliques minces, notamment de tôles pour l'industrie automobile, qui ne présente notamment pas cet inconvénient.The present invention aims to provide a device for marking thin metal parts, in particular sheet metal for the automotive industry, which does not in particular have this drawback.

La présente invention se caractérise par le fait que la force exercée sur la molette, lors de l'impression d'un motif, est réglée à une valeur constante, suffisante pour imprimer le motif le plus complexe, et par le fait que chaque plaquette gravée de la molette comporte une surface de base plane, de laquelle un motif fait saillie, et qui sert de butée limitant l'enfoncement de ladite plaquette dans la surface de la pièce à marquer.The present invention is characterized by the fact that the force exerted on the dial, when printing a pattern, is adjusted to a constant value, sufficient to print the most complex pattern, and by the fact that each engraved plate of the wheel has a flat base surface, from which a pattern projects, and which serves as a stop limiting the insertion of said plate into the surface of the part to be marked.

Dans un mode de réalisation préféré de l'invention, le châssis comporte des poignées de manoeuvre et est suspendu à un treuil à couple constant qui permet son déplacement dans l'espace.In a preferred embodiment of the invention, the chassis includes operating handles and is suspended from a winch with constant torque which allows it to move in space.

Avantageusement, le dispositif selon l'invention est relié à une armoire de commande électronique qui commande les différents organes du dispositif en fonction du marquage désiré.Advantageously, the device according to the invention is connected to an electronic control cabinet which controls the various organs of the device according to the desired marking.

En particulier, cette armoire de commande peut piloter l'accrochage du châssis sur la pièce à marquer, le déplacement du premier chariot, la rotation de la molette, et la translation du second chariot pour l'impression d'un motif.In particular, this control cabinet can control the attachment of the chassis to the part to be marked, the movement of the first carriage, the rotation of the wheel, and the translation of the second carriage for printing a pattern.

Dans le but de mieux faire comprendre l'invention, on va en décrire maintenant un mode de réalisation donné à titre d'exemple non limitatif, en référence au dessin annexé dans lequel :

  • la figure 1 représente un poste de marquage équipé d'un dispositif selon l'invention,
  • la figure 2 est une vue en coupe et en élévation du dispositif de la figure 1,
  • la figure 3 est une vue en coupe selon III-III de la figure 2,
  • la figure 4 est une vue en coupe selon IV-IV de la figure 3,
  • la figure 5 est une vue de détail de la figure 3 pendant une opération d'impression,
  • la figure 6 est une vue de détail de la figure 2, et
  • la figure 7 est une vue en coupe selon VII-VII de la figure 6.
In order to better understand the invention, we will now describe an embodiment given by way of non-limiting example, with reference to the accompanying drawing in which:
  • FIG. 1 represents a marking station equipped with a device according to the invention,
  • FIG. 2 is a view in section and in elevation of the device of FIG. 1,
  • FIG. 3 is a sectional view along III-III of FIG. 2,
  • FIG. 4 is a sectional view along IV-IV of FIG. 3,
  • FIG. 5 is a detailed view of FIG. 3 during a printing operation,
  • FIG. 6 is a detailed view of FIG. 2, and
  • FIG. 7 is a sectional view along VII-VII of FIG. 6.

Dans le poste de marquage d'une chaîne de production de véhicules automobiles de la figure 1, un opérateur 1, debout devant un véhicule 2, manipule un dispositif 3 selon l'invention.In the marking station of a motor vehicle production line in FIG. 1, an operator 1, standing in front of a vehicle 2, manipulates a device 3 according to the invention.

Le dispositif 3 est suspendu par un câble 4 à un treuil à couple constant 5 qui permet à l'opérateur 1 de faire monter ou descendre le dispositif 3 à volonté.The device 3 is suspended by a cable 4 from a constant torque winch 5 which allows the operator 1 to raise or lower the device 3 at will.

Le treuil 5 est monté sur un système de rails 6 qui autorise son déplacement dans toutes les directions.The winch 5 is mounted on a rail system 6 which allows it to be moved in all directions.

Un faisceau électrique, non représenté, relie le dispositif 3 à une armoire de commande 7, tandis que des conduites hydrauliques, non représentées, relient le dispositif 3 à une centrale hydraulique 8.An electrical harness, not shown, connects the device 3 to a control cabinet 7, while hydraulic lines, not shown, connect the device 3 to a hydraulic unit 8.

Le dispositif 3 est représenté en coupe sur la figure 2, abstraction faite de l'organe de sustentation et des poignées que l'on voit sur la figure 1.The device 3 is shown in section in FIG. 2, apart from the lifting member and the handles that can be seen in FIG. 1.

Le dispositif comporte un châssis 9, un premier chariot 10 mobile par rapport au châssis 9 selon la direction X et un second chariot 11 mobile par rapport au premier chariot 10 selon la direction Y.The device comprises a chassis 9, a first carriage 10 movable relative to the chassis 9 in the direction X and a second carriage 11 movable relative to the first carriage 10 in the direction Y.

Des glissières 12 permettent le coulissement du premier chariot 10 par rapport au châssis 9.Slides 12 allow the first carriage 10 to slide relative to the chassis 9.

Comme on le voit sur la vue en coupe de la figure 3, le déplacement du premier chariot 10 est assuré par un moteur électrique pas à pas 13, qui est monté sur le châssis 9, et dont l'arbre de rotation est solidaire d'une tige filetée 14, laquelle coopère avec un filetage, non représenté, prévu dans le premier chariot 10.As seen in the sectional view of Figure 3, the movement of the first carriage 10 is provided by an electric stepper motor 13, which is mounted on the frame 9, and whose rotation shaft is integral with a threaded rod 14, which cooperates with a thread, not shown, provided in the first carriage 10.

Des détecteurs de présence 15 permettent de détecter l'arrivée en fin de course du premier chariot 10.Presence detectors 15 make it possible to detect the arrival at the end of the travel of the first carriage 10.

Sur le second chariot 11, est montée une molette 16 dont la périphérie supporte une pluralité de plaquettes gravées de motifs différents.On the second carriage 11, a thumbwheel 16 is mounted, the periphery of which supports a plurality of plates engraved with different patterns.

La molette 16 est montée rotative autour d'un axe 17 qui est perpendiculaire aux directions de déplacement X du premier chariot 10 et Y du second chariot 11.The thumbwheel 16 is rotatably mounted around an axis 17 which is perpendicular to the directions of movement X of the first carriage 10 and Y of the second carriage 11.

Un second moteur électrique 18 est logé sur le second chariot 11 au-dessus de la molette 16, et permet, par l'intermédiaire d'un mécanisme d'entraînement 19, de faire tourner ladite molette 16 pour amener une plaquette gravée portant un motif désiré à sa partie inférieure.A second electric motor 18 is housed on the second carriage 11 above the wheel 16, and allows, via a drive mechanism 19, to rotate said wheel 16 to bring an engraved plate bearing a pattern desired at its bottom.

Un vérin hydraulique 20, monté à la partie supérieure du premier chariot 10 est apte à déplacer le second chariot 11 le long de glissières 21 qui sont visibles sur la figure 4.A hydraulic cylinder 20, mounted at the top of the first carriage 10 is able to move the second carriage 11 along slides 21 which are visible in FIG. 4.

A sa partie inférieure, le dispositif selon l'invention comporte une mâchoire 22 articulée sur le châssis 9 autour d'un axe 23 parallèle à la direction X de déplacement du premier chariot 10.At its lower part, the device according to the invention comprises a jaw 22 articulated on the chassis 9 around an axis 23 parallel to the direction X of movement of the first carriage 10.

La mâchoire 22 se situe en-dessous du premier chariot 10, et supporte un "tas" de réaction 23 disposé en regard de la partie inférieure de la molette 16.The jaw 22 is located below the first carriage 10, and supports a reaction "pile" 23 placed opposite the lower part of the wheel 16.

Un mécanisme à genouillère 24, actionné par un vérin, non représenté, permet de déplacer la mâchoire 22 entre une position ouverte, qui est représentée en trait interrompu sur la figure 2, et une position fermée, représentée en trait plein, dans laquelle elle réalise l'accrochage du dispositif selon l'invention à la pièce métallique à marquer.A toggle mechanism 24, actuated by a jack, not shown, makes it possible to move the jaw 22 between an open position, which is shown in broken lines in FIG. 2, and a closed position, shown in solid lines, in which it achieves the attachment of the device according to the invention to the metal part to be marked.

A cet effet, le châssis 9 comporte des butées 25 contre lesquelles la pièce métallique vient prendre appui en étant alors pincée entre ses butées 25 et le tas de réaction 23.To this end, the chassis 9 includes stops 25 against which the metal part comes to bear while being pinched between its stops 25 and the reaction pile 23.

Le fonctionnement du dispositif est le suivant.The operation of the device is as follows.

Initialement, le premier chariot 10 se trouve en position de repos représenté sur la figure 3.Initially, the first carriage 10 is in the rest position shown in FIG. 3.

Le moteur 18, par l'intermédiaire du mécanisme d'entraînement 19, fait tourner la molette 16 pour amener à sa partie inférieure une plaquette gravée portant le premier motif du marquage à imprimer sur la pièce métallique.The motor 18, via the drive mechanism 19, rotates the thumbwheel 16 to bring to its lower part an engraved plate bearing the first pattern of the marking to be printed on the metal part.

Le vérin 20 est ensuite actionné pour faire descendre le second chariot 11 vers le bas, de manière à appliquer la plaquette gravée voulue contre la pièce métallique.The jack 20 is then actuated to lower the second carriage 11 downward, so as to apply the desired engraved plate against the metal part.

On voit, sur la figure 5, une pièce métallique 26 emprisonnée entre une plaquette 27 de la molette 16 et le "tas" de réaction 23.FIG. 5 shows a metal part 26 trapped between a plate 27 of the thumb wheel 16 and the reaction "pile" 23.

La pression exercée par le vérin 20 est avantageusement réglée de manière à correspondre à la pression nécessaire pour imprimer le motif le plus complexe de tous ceux qui sont portés par la molette 16.The pressure exerted by the jack 20 is advantageously adjusted so as to correspond to the pressure necessary to print the most complex pattern of all those which are carried by the wheel 16.

Pour éviter qu'une plaquette portant un motif plus simple ne s'enfonce trop fortement dans la pièce métallique 26, chaque plaquette gravée comporte une surface de base plane 28 qui limite son enfoncement, comme on le voit sur la figure 5.To prevent a plate bearing a simpler pattern from sinking too strongly into the metal part 26, each engraved plate has a flat base surface 28 which limits its sinking, as seen in FIG. 5.

Par ailleurs, le dispositif comporte un organe de blocage de la molette, qui immobilise automatiquement cette dernière dans sa position angulaire courante, lorsque le second chariot passe de sa position de repos à sa position d'impression.Furthermore, the device comprises a locking member of the wheel, which automatically immobilizes the latter in its current angular position, when the second carriage moves from its rest position to its printing position.

Dans le mode de réalisation décrit, l'organe de blocage est constitué par un levier 29, visible sur la figure 2, qui est articulé sur le second chariot 11 autour d'un axe perpendiculaire au déplacement de ce dernier et fait saillie sur la face de ce second chariot 11 voisine du premier chariot 10.In the embodiment described, the blocking member is constituted by a lever 29, visible in FIG. 2, which is articulated on the second carriage 11 around an axis perpendicular to the movement of the latter and projects from the face of this second carriage 11 adjacent to the first carriage 10.

Une came 30 faisant saillie de cette face du premier chariot 10 coopère avec le levier 29.A cam 30 projecting from this face of the first carriage 10 cooperates with the lever 29.

En position haute ou position de repos du second chariot 11, comme représenté sur la figure 2 , la came 30 repousse le levier 29 dans sa position de repos qui est par ailleurs imposée par le ressort de torsion 31.In the high position or the rest position of the second carriage 11, as shown in FIG. 2, the cam 30 pushes the lever 29 back into its rest position which is moreover imposed by the torsion spring 31.

En position basse ou position d'impression du second chariot, la came 30 fait pivoter le levier 29, ce qui provoque l'engagement de son ergot 29a dans une rainure non représentée prévue à cet effet sur la molette 16.In the low position or printing position of the second carriage, the cam 30 pivots the lever 29, which causes its lug 29 a to engage in a not shown groove provided for this purpose on the thumbwheel 16.

Ainsi, on comprend que, lors de la descente du second chariot, la molette s'immobilise en rotation de manière à assurer une bonne application de la plaquette gravée 27.Thus, it is understood that, when the second carriage descends, the wheel stops in rotation so as to ensure proper application of the engraved plate 27.

Après impression du premier motif, le second chariot 11 remonte en position de repos et le moteur 13 déplace le chariot 10 sur une distance légèrement supérieure à la largeur d'un motif.After printing the first pattern, the second carriage 11 rises to the rest position and the motor 13 moves the carriage 10 a distance slightly greater than the width of a pattern.

Un second motif peut ainsi être imprimé sur la pièce métallique 26, à côté du premier motif, en répétant les opérations décrites ci-dessus.A second pattern can thus be printed on the metal part 26, next to the first pattern, by repeating the operations described above.

Pendant toute l'opération de marquage, les motifs sont successivement imprimés sur la surface de la pièce métallique, sans que la mâchoire 22 ne soit déverrouillée de sa position d'accrochage sur la pièce métallique 26.During the entire marking operation, the patterns are successively printed on the surface of the metal part, without the jaw 22 being unlocked from its hooking position on the metal part 26.

Le dispositif selon l'invention présente l'avantage essentiel qu'il permet l'impression de marquages de longueurs différentes en utilisant toujours une même puissance d'impression.The device according to the invention has the essential advantage that it allows the printing of markings of different lengths always using the same printing power.

Les figures 6 et 7 représentent le mécanisme d'entraînement 19.Figures 6 and 7 show the drive mechanism 19.

Sur la figure 6, on a représenté en trait interrompu le moteur 18, son arbre d'entraînement 32, une première courroie 33 reliant ledit arbre d'entraînement 32 à un réducteur 34, une seconde courroie 35 et l'arbre d'entraînement 17 de la molette 16.In Figure 6, there is shown in broken lines the motor 18, its drive shaft 32, a first belt 33 connecting said drive shaft 32 to a reduction gear 34, a second belt 35 and the drive shaft 17 wheel 16.

Le mécanisme d'entraînement 19 comporte en outre deux organes de sécurité 36 et 37 qui ont pour rôle de contrôler en permanence la bonne tension des courroies 33 et 35.The drive mechanism 19 also comprises two safety members 36 and 37 which have the role of constantly monitoring the correct tension of the belts 33 and 35.

Chaque organe de sécurité comporte un levier 38 monté pivotant autour d'un axe 39 perpendiculaire au plan des courroies.Each safety member comprises a lever 38 mounted pivoting about an axis 39 perpendicular to the plane of the belts.

Le levier 38 comporte, dans sa partie médiane, une roulette 40 portée par un axe 41 également perpendiculaire au plan des courroies.The lever 38 comprises, in its middle part, a caster 40 carried by an axis 41 also perpendicular to the plane of the belts.

Un ressort de torsion 42 exerce un couple sur le levier 38 dans le sens d'un appui de la roulette 40 sur la courroie correspondante 33 ou 35.A torsion spring 42 exerts a torque on the lever 38 in the direction of support of the caster 40 on the corresponding belt 33 or 35.

Lorsque les courroies sont convenablement tendues, l'extrémité de chaque levier 38 se situe en regard d'un capteur de proximité 43,44 correspondant.When the belts are properly tensioned, the end of each lever 38 is situated opposite a corresponding proximity sensor 43, 44.

Tant que le capteur de proximité 43,44 détecte la présence de l'extrémité du levier 38, on comprend que les courroies 33 et 35 sont convenablement tendues.As long as the proximity sensor 43, 44 detects the presence of the end of the lever 38, it is understood that the belts 33 and 35 are suitably tensioned.

En revanche, en cas de rupture ou de mauvaise tension d'une des courroies, le levier 38 pivote autour de son axe 39 et le capteur de proximité 43,44 correspondant signale cette anomalie à l'opérateur et/ou à un dispositif de sécurité qui neutralise le fonctionnement du dispositif selon l'invention.On the other hand, in the event of a rupture or incorrect tension of one of the belts, the lever 38 pivots about its axis 39 and the corresponding proximity sensor 43,44 signals this anomaly to the operator and / or to a safety device which neutralizes the operation of the device according to the invention.

Il est bien entendu que le mode de réalisation qui vient d'être décrit ne présente aucun caractère limitatif et qu'il pourra recevoir toutes modifications désirables sans sortir pour cela du cadre de l'invention.It is understood that the embodiment which has just been described has no limiting character and that it can receive any desirable modifications without departing from the scope of the invention.

Claims (5)

1 - Dispositif pour le marquage de pièces métalliques minces, notamment de tôles pour l'industrie automobile, comportant un châssis (9) muni de moyens d'accrochage (22) à une pièce métallique à marquer (26), un premier chariot (10) mobile en translation sur le châssis (9) parallèlement à la surface de la pièce à marquer (26) et un second chariot (11), supportant une molette (16) qui comporte, à sa périphérie, une pluralité de plaquettes gravées chacune d'un motif (27), ladite molette étant montée rotative sur le second chariot (11) autour d'un axe (17) parallèle au plan de la surface de la pièce à marquer (26), et étant apte à amener l'une de ses plaquettes gravées (27) en regard de la surface de la pièce à marquer (26), ledit second chariot (11) étant mobile par rapport au premier chariot (10) entre une position de repos dans laquelle la molette (16) est écartée de la surface de la pièce à marquer (26) et une position d'impression dans laquelle la molette (16) applique ladite plaquette gravée (27) contre la surface de la pièce à marquer (26) en exerçant une pression suffisante pour imprimer le motif, caractérisé par le fait que la force exercée sur la molette (16) lors de l'impression d'un motif, est réglée à une valeur constante, suffisante pour imprimer le motif le plus complexe, et par le fait que chaque plaquette gravée (27) de la molette comporte une surface de base plane (28), de laquelle un motif fait saillie, et qui sert de butée limitant l'enfoncement de ladite plaquette gravée dans la surface de la pièce à marquer (26). 1 - Device for marking thin metal parts, in particular sheets for the automotive industry, comprising a chassis (9) provided with attachment means (22) to a metal part to be marked (26), a first carriage (10 ) movable in translation on the chassis (9) parallel to the surface of the part to be marked (26) and a second carriage (11), supporting a wheel (16) which comprises, at its periphery, a plurality of plates each engraved with 'a pattern (27), said wheel being rotatably mounted on the second carriage (11) about an axis (17) parallel to the plane of the surface of the workpiece (26), and being capable of bringing one of its engraved plates (27) facing the surface of the part to be marked (26), said second carriage (11) being movable relative to the first carriage (10) between a rest position in which the wheel (16) is away from the surface of the workpiece (26) and a printing position in which the mole head (16) applies said engraved plate (27) against the surface of the workpiece (26) by exerting sufficient pressure to print the pattern, characterized in that the force exerted on the wheel (16) during the printing of a pattern, is set to a constant value, sufficient to print the most complex pattern, and by the fact that each engraved plate (27) of the dial has a flat base surface (28), of which a pattern protrudes, and which serves as a stop limiting the sinking of said engraved plate in the surface of the part to be marked (26). 2 - Dispositif selon la revendication 1, caractérisé par le fait que la molette gravée est entraînée en rotation par un moteur pas à pas (18) par l'intermédiaire d'un mécanisme d'entraînement (19). 2 - Device according to claim 1, characterized in that the engraved wheel is rotated by a stepping motor (18) via a drive mechanism (19). 3 - Dispositif selon la revendication 2, caractérisé par le fait que le mécanisme d'entraînement (19) comporte un réducteur (34). 3 - Device according to claim 2, characterized in that the drive mechanism (19) comprises a reduction gear (34). 4 - Dispositif selon la revendication 3, caractérisé par le fait qu'il comporte des organes de sécurité (36,37) qui contrôlent en permanence la bonne tension de courroies (32,35) du mécanisme d'entraînement (19). 4 - Device according to claim 3, characterized in that it comprises safety members (36,37) which constantly monitor the correct tension of belts (32,35) of the drive mechanism (19). 5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé par le fait qu'il comporte un organe de blocage (29) de la molette (16), qui immobilise automatiquement cette dernière dans sa position angulaire courante, lorsque le second chariot (11) passe de sa position de repos à sa position d'impression. 5. Device according to any one of claims 1 to 4, characterized in that it comprises a blocking member (29) of the wheel (16), which automatically immobilizes the latter in its current angular position, when the second carriage (11) passes from its rest position to its printing position.
EP95401419A 1994-06-17 1995-06-16 Device for marking thin plates, in particular for body sheets in the vehicle industry Withdrawn EP0687578A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9407436A FR2721246B1 (en) 1994-06-17 1994-06-17 Device for marking thin metal parts, in particular sheets for the automotive industry.
FR9407436 1994-06-17

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EP0687578A1 true EP0687578A1 (en) 1995-12-20

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EP95401419A Withdrawn EP0687578A1 (en) 1994-06-17 1995-06-16 Device for marking thin plates, in particular for body sheets in the vehicle industry

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EP (1) EP0687578A1 (en)
FR (1) FR2721246B1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3122392A1 (en) * 1981-06-05 1983-01-05 Intero - Stahl- und Maschinenbau Schmitz GmbH & Co KG, 4224 Hünxe Stamping machine
US4431321A (en) 1982-01-29 1984-02-14 Product Identification Corporation Computer controlled marking apparatus
US4588465A (en) * 1983-02-04 1986-05-13 Minnesota Mining And Manufacturing Company Method for forming a sealed container
DE3607768A1 (en) * 1985-04-22 1986-10-23 Bauer Kaba Ag, Wetzikon Multi-digit marking device with adjustable symbol carriers
DE3522251C1 (en) * 1985-06-21 1987-01-22 Integral Hydraulik Co Machine for engraving alphanumeric or other characters into workpieces

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3165236D1 (en) * 1980-09-02 1984-09-06 Signode Corp Marking machine control system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3122392A1 (en) * 1981-06-05 1983-01-05 Intero - Stahl- und Maschinenbau Schmitz GmbH & Co KG, 4224 Hünxe Stamping machine
US4431321A (en) 1982-01-29 1984-02-14 Product Identification Corporation Computer controlled marking apparatus
US4588465A (en) * 1983-02-04 1986-05-13 Minnesota Mining And Manufacturing Company Method for forming a sealed container
DE3607768A1 (en) * 1985-04-22 1986-10-23 Bauer Kaba Ag, Wetzikon Multi-digit marking device with adjustable symbol carriers
DE3522251C1 (en) * 1985-06-21 1987-01-22 Integral Hydraulik Co Machine for engraving alphanumeric or other characters into workpieces

Also Published As

Publication number Publication date
FR2721246B1 (en) 1996-09-06
FR2721246A1 (en) 1995-12-22

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