EP0511133A1 - Device for marking by micro-percussion - Google Patents

Device for marking by micro-percussion Download PDF

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Publication number
EP0511133A1
EP0511133A1 EP92420134A EP92420134A EP0511133A1 EP 0511133 A1 EP0511133 A1 EP 0511133A1 EP 92420134 A EP92420134 A EP 92420134A EP 92420134 A EP92420134 A EP 92420134A EP 0511133 A1 EP0511133 A1 EP 0511133A1
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EP
European Patent Office
Prior art keywords
shutter
piston
cylinder
wall
marking
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
EP92420134A
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German (de)
French (fr)
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EP0511133B1 (en
Inventor
Marcel Therond
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" TECHNIFOR"
Technifor
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" TECHNIFOR"
Technifor
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Publication of EP0511133A1 publication Critical patent/EP0511133A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/26—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H7/00—Marking-out or setting-out work
    • B25H7/04—Devices, e.g. scribers, for marking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/0061—Machines or apparatus for embossing decorations or marks, e.g. embossing coins characterised by the power drive
    • B44B5/0066—Machines or apparatus for embossing decorations or marks, e.g. embossing coins characterised by the power drive producing a vibratory motion

Definitions

  • the present invention relates to the marking of objects, metallic or not, such as stamped, laminated, welded, molded or other types, by means of a point working by micro-percussion along a determined path comprising numbers, letters or other motives.
  • the tips of the known devices used for this type of marking are most often actuated by pneumatic means which make them vibrate at relatively high frequencies. The result is a high-intensity, high-intensity sound emission which is difficult to attenuate.
  • the invention aims to control the percussion frequency in order to be able to reduce it by taking account of the marking conditions, in order to lower the sound level without appreciably harming the quality and speed of marking.
  • the marking device which is the subject of the invention makes it possible to reduce the frequency of marking to values clearly lower than those most often used. It also makes it possible to adjust this marking frequency as a function of the conditions of use and in particular as a function of the speed of travel of the tool in the marking plane and also of the size of the signs, numbers, letters or other than we propose to achieve. This device makes it possible to obtain such results without significantly increasing the mass of the marking head. Finally, it is possible to adjust the marking frequency at any time within a determined interval.
  • the marking device according to the invention is defined in claim 1.
  • the device referenced 1 in fig. 1 has a general shape of revolution around the axis X1-X1.
  • This device 1 comprises a body 2 made of a plastic material, inside which are housed the marking tool 3 and the means enabling it to be actuated.
  • An axial passage 4 guides the tip 5 which passes through it with a minimum of play.
  • a cap 6 closes the body 2 in a leaktight manner by means of a flange 7 and an O-ring seal 8.
  • the head of the marking tool 3 is formed by a steel piston 9 which is integral with the point 5 of metal carbide and which is driven, by a compressed fluid, with an alternating movement along the axis X1-X1 to inside the cylinder 10.
  • the displacement of the piston 9 is limited by a stop 11, of revolution with respect to the axis X1-X1, carried by a part 21 itself secured to a fixed part 22 integral with the cap 6.
  • An O-ring 12 placed in an annular housing in the vicinity of the upper end of the cylinder 10, ensures a sealed connection between this cylinder 10 and the piston 9 when the latter is in abutment against the stop 11.
  • a shutter 13 with a cylindrical outer wall 14 is capable of sliding with a small clearance in a housing 15, of revolution relative to the axis X1-X1 and disposed above the cylinder 10.
  • This shutter 13 is able to move between a closed position for which its lower edge 16 is in leaktight support against the upper edge 17 of the cylinder 10 thanks to an O-ring 18, and an open position for which its frustoconical bearing surface 19 comes to sealingly bear against a corresponding bearing surface 20 of the part 21 secured to the fixed part 22.
  • the upper end of the shutter 13 has an annular wall 24, the inner edge of which slides around the fixed part 22 by means of a sealed O-ring 25 placed in an annular housing 26.
  • the cylindrical displacement of the shutter 13 in the alternate closed or open position is caused by cyclic control means indicated purely schematically in CC in FIG. 1, which connect at least one secondary pipe such as 27, 28 alternately with the channel B1 or B2 at adjustable frequency.
  • Track B1 is connected to the same source of pressurized fluid "P" (not shown) as the primary pipe A1 which is connected to the annular space 29 surrounding the connection zone between the cylinder 10 and the shutter 13 when this the latter is in the closed position.
  • Channel B2 is connected to the open air.
  • the cyclic control means CC make it possible to carry out, at a determined and adjustable frequency, the operating cycle which will now be described.
  • the first phase of this cycle connects, along path B1, the upper zone 31 of the housing 15 of the shutter with the source P by the secondary pipes 27, 28. It can be seen that the thrust exerted by the control fluid on the wall 24 of the shutter 13 is greater than that exerted in the opposite direction by the fluid coming from the same source P along the path A1 and penetrating into the thrust chamber 30 above the piston 9. In fact, the shutter, in the open position, is sealingly pressed against the part 21 by the frustoconical surfaces 19 and 20. Under these conditions the cross section of the lower edge 16 of the shutter 13 subjected to the pressure of the fluid contained in this chamber is, by construction, less than the cross section of the upper wall 24.
  • the opening of the passage between the frustoconical surfaces 19, 20 places the thrust chamber 30 in communication with the purging means constituted by the passage 33, 34, 35 and facilitates the action of the return means which makes it possible to return the piston 9 in the high position in abutment against the stop 11.
  • This return means is a fluid back pressure which is established in the annular zone 36 inside the cylinder, in its lower part, below the range of the piston 9.
  • at least one passage 37 is formed in the wall of the body 2 of the device 1 to put in direct or indirect communication the secondary pipes 27, 28 with at least one radial bore 38 produced through the wall of the cylinder 10
  • closing the shutter 13 and purging of the thrust chamber 30 are accompanied by the return in abutment of the piston 9.
  • the second phase of the cycle connects the secondary pipes 27, 28 with the open air via the path B2, which causes the purging of the superposed fluid contained in the upper zone 31 of the housing 15 and in the annular zone 36.
  • the thrust exerted by the fluid coming from the source P along the primary pipe A1 thrust which is exerted on the annular edge 16 of the shutter 13, causes its opening and drives out the piston 9 which brutally drives the tip of marking 5 in the direction of the part to be marked.
  • the entry of this passage is provided with an entry area 39 of increased diameter in which engages , with a small clearance, an extension 40 of the piston 9 at the end of the outward travel.
  • the compression of the fluid by this extension 40 in this entry zone 39 ensures effective braking of the tool 3 when the marking tip 5 does not meet the part to be marked.
  • the marking tip 5 is advantageously made of a metal carbide, for the sharpened end at least.
  • the operating frequency of the cyclic control means CC of the marking device is adjusted, so that the duration of each cycle is adjustable in a time interval of the order of 10 to 50 ms.
  • the return of the piston 9 can be carried out by another means than by the action of the pressurized fluid.

Abstract

This comprises a marking tool (3) comprising a tip (5) attached to a piston (9) which slides inside a cylinder (10). Cyclical control means (CC) alternately move a shutoff element (13) at a specific frequency into the closed or open position. In the open position, the tool (3) is pushed by a pressurised fluid acting on its piston (9) in such a way that its tip (5) strikes the object intended to be marked. With the shutoff element (13) in the closed position, the piston is brought back to its initial position at the top of the cylinder (10) by return means. <IMAGE>

Description

La présente invention a trait au marquage d'objets, métalliques ou non, tels que poèces embouties, laminées, soudées, moulées ou autres, au moyen d'une pointe travaillant par micro-percussion suivant un tracé déterminé comprenant des chiffres, lettres ou autres motifs.The present invention relates to the marking of objects, metallic or not, such as stamped, laminated, welded, molded or other types, by means of a point working by micro-percussion along a determined path comprising numbers, letters or other motives.

Les pointes des dispositifs connus utilisés pour ce type de marquage sont le plus souvent actionnées par des moyens pneumatiques qui les font vibrer à des fréquences relativement élevées. Il en résulte une émission sonore aigüe et d'intensité élevée qu'il est difficile d'atténuer.The tips of the known devices used for this type of marking are most often actuated by pneumatic means which make them vibrate at relatively high frequencies. The result is a high-intensity, high-intensity sound emission which is difficult to attenuate.

L'invention vise à contrôler la fréquence de percussion afin de pouvoir réduire celle-ci en tenant compte des conditions de marquage, afin d'abaisser le niveau sonore sans nuire de façon appréciable à la qualité et à la vitesse de marquage.The invention aims to control the percussion frequency in order to be able to reduce it by taking account of the marking conditions, in order to lower the sound level without appreciably harming the quality and speed of marking.

Le dispositif de marquage qui fait l'objet de l'invention permet de réduire la fréquence de marquage à des valeurs nettement plus faibles que celles le plus souvent utilisées. Il permet aussi de régler cette fréquence de marquage en fonction des conditions d'utilisation et en particulier en fonction de la vitesse de parcours de l'outil dans le plan de marquage et aussi de la dimension des signes, chiffres, lettres ou autres qu'on se propose de réaliser. Ce dispositif permet d'obtenir de tels résultats sans aungmenter de façon importante la masse de la tête de marquage. Enfin il est possible de régler la fréquence de marquage à tout instant dans un intervalle déterminé.The marking device which is the subject of the invention makes it possible to reduce the frequency of marking to values clearly lower than those most often used. It also makes it possible to adjust this marking frequency as a function of the conditions of use and in particular as a function of the speed of travel of the tool in the marking plane and also of the size of the signs, numbers, letters or other than we propose to achieve. This device makes it possible to obtain such results without significantly increasing the mass of the marking head. Finally, it is possible to adjust the marking frequency at any time within a determined interval.

Le dispositif de marquage suivant l'invention est défini à la revendication 1.The marking device according to the invention is defined in claim 1.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :

  • Fig. 1 est une coupe axiale schématique du dispositif de marquage suivant l'invention.
  • Fig. 2 illustre en coupe un mode particulier de réalisation de ce dispositif.
The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:
  • Fig. 1 is a schematic axial section of the marking device according to the invention.
  • Fig. 2 illustrates in section a particular embodiment of this device.

Le dispositif référencé 1 en fig. 1 présente une forme générale de révolution autour de l'axe X1-X1.The device referenced 1 in fig. 1 has a general shape of revolution around the axis X1-X1.

Ce dispositif 1 comprend un corps 2 en une matière plastique, à l'intérieur duquel sont logés l'outil de marquage 3 et les moyens permettant de l'actionner. Un passage axial 4 assure le guidage de la pointe 5 qui le traverse avec un minimum de jeu. Un chapeau 6 ferme le corps 2 de façon étanche au moyen d'une bride 7 et d'un joint torique d'étanchéité 8.This device 1 comprises a body 2 made of a plastic material, inside which are housed the marking tool 3 and the means enabling it to be actuated. An axial passage 4 guides the tip 5 which passes through it with a minimum of play. A cap 6 closes the body 2 in a leaktight manner by means of a flange 7 and an O-ring seal 8.

La tête de l'outil de marquage 3 est formée par un piston en acier 9 qui est solidaire de la pointe 5 en carbure métallique et qui est animé, par un fluide comprimé, d'un mouvement alternatif suivant l'axe X1-X1 à l'intérieur du cylindre 10. En position haute, le déplacement du piston 9 est limité par une butée 11, de révolution par rapport à l'axe X1-X1, portée par une pièce 21 elle-même solidaire d'une pièce fixe 22 solidaire du chapeau 6. Un joint torique 12, placé dans un logement annulaire au voisinage de l'extrémité supérieure du cylindre 10, assure une liaison étanche entre ce cylindre 10 et le piston 9 lorsque celui-ci est en appui contre la butée 11.The head of the marking tool 3 is formed by a steel piston 9 which is integral with the point 5 of metal carbide and which is driven, by a compressed fluid, with an alternating movement along the axis X1-X1 to inside the cylinder 10. In the high position, the displacement of the piston 9 is limited by a stop 11, of revolution with respect to the axis X1-X1, carried by a part 21 itself secured to a fixed part 22 integral with the cap 6. An O-ring 12, placed in an annular housing in the vicinity of the upper end of the cylinder 10, ensures a sealed connection between this cylinder 10 and the piston 9 when the latter is in abutment against the stop 11.

Un obturateur 13 à paroi extérieure cylindrique 14 est apte à coulisser avec un faible jeu dans un logement 15, de révolution par rapport à l'axe X1-X1 et disposé au dessus du cylindre 10. Cet obturateur 13 est apte à se déplacer entre une position de fermeture pour laquelle son bord inférieur 16 est en appui étanche contre le bord supérieur 17 du cylindre 10 grâce à un joint torique 18, et une position d'ouverture pour laquelle sa portée tronconique 19 vient en appui étanche contre une portée correspondante 20 de la pièce 21 solidaire de la pièce fixe 22.A shutter 13 with a cylindrical outer wall 14 is capable of sliding with a small clearance in a housing 15, of revolution relative to the axis X1-X1 and disposed above the cylinder 10. This shutter 13 is able to move between a closed position for which its lower edge 16 is in leaktight support against the upper edge 17 of the cylinder 10 thanks to an O-ring 18, and an open position for which its frustoconical bearing surface 19 comes to sealingly bear against a corresponding bearing surface 20 of the part 21 secured to the fixed part 22.

L'extrémité supérieure de l'obturateur 13 comporte une paroi annulaire 24 dont le bord intérieur coulisse autour de la pièce fixe 22 grâce à un joint torique étanche 25 placé dans un logement annulaire 26.The upper end of the shutter 13 has an annular wall 24, the inner edge of which slides around the fixed part 22 by means of a sealed O-ring 25 placed in an annular housing 26.

Le déplacement cylindrique de l'obturateur 13 en position alternée de fermeture ou d'ouverture est provoqué par des moyens de commande cyclique indiqués de façon purement schématique en CC en fig. 1, qui mettent en communication au moins une canalisation secondaire telle que 27, 28 alternativement avec la voie B1 ou B2 à fréquence réglable.The cylindrical displacement of the shutter 13 in the alternate closed or open position is caused by cyclic control means indicated purely schematically in CC in FIG. 1, which connect at least one secondary pipe such as 27, 28 alternately with the channel B1 or B2 at adjustable frequency.

La voie B1 est reliée à la même source de fluide sous pression "P" (non représentée) que la canalisation primaire A1 qui est reliée à l'espace annulaire 29 entourant la zone de liaison entre le cylindre 10 et l'obturateur 13 quand ce dernier est en position de fermeture. La voie B2 est reliée à l'air libre.Track B1 is connected to the same source of pressurized fluid "P" (not shown) as the primary pipe A1 which is connected to the annular space 29 surrounding the connection zone between the cylinder 10 and the shutter 13 when this the latter is in the closed position. Channel B2 is connected to the open air.

Les moyens de commande cyclique CC permettent de réaliser, à une fréquence déterminée et ajustable, le cycle opératoire qui va maintenant être exposé.The cyclic control means CC make it possible to carry out, at a determined and adjustable frequency, the operating cycle which will now be described.

La première phase de ce cycle met en relation, suivant la voie B1, la zone supérieure 31 du logement 15 de l'obturateur avec la source P par les canalisations secondaires 27, 28. On constate que la poussée exercée par le fluide de commande sur la paroi 24 de l'obturateur 13 est supérieure à celle exercée en sens inverse par le fluide provenant de la même source P suivant la voie A1 et pénétrant dans la chambre de poussée 30 au dessus du piston 9. En effet, l'obturateur, en position d'ouverture, est en appui étanche contre la pièce 21 par les portées tronconiques 19 et 20. Dans ces conditions la section transversale du bord inférieur 16 de l'obturateur 13 soumise à la pression du fluide contenu dans cette chambre est, par construction, inférieure à la section transversale de la paroi supérieure 24. De plus l'espace 32, à l'intérieur de l'obturateur 13, et relié en permanence à l'air libre par le passage 33, 34 qui traverse la pièce fixe 22 et débouche à l'air libre par le perçage 35 à travers le chapeau 6. Ainsi l'obturateur 13 est poussé jusqu'à fermeture du passage de fluide primaire par la voie A1.The first phase of this cycle connects, along path B1, the upper zone 31 of the housing 15 of the shutter with the source P by the secondary pipes 27, 28. It can be seen that the thrust exerted by the control fluid on the wall 24 of the shutter 13 is greater than that exerted in the opposite direction by the fluid coming from the same source P along the path A1 and penetrating into the thrust chamber 30 above the piston 9. In fact, the shutter, in the open position, is sealingly pressed against the part 21 by the frustoconical surfaces 19 and 20. Under these conditions the cross section of the lower edge 16 of the shutter 13 subjected to the pressure of the fluid contained in this chamber is, by construction, less than the cross section of the upper wall 24. In addition, the space 32, inside the shutter 13, and permanently connected to the open air through the passage 33, 34 which passes through the fixed part 22 and opens to air l ibre through the bore 35 through the cap 6. Thus the shutter 13 is pushed until the primary fluid passage is closed by the path A1.

L'ouverture du passage entre les portées tronconiques 19, 20 met en communication la chambre de poussée 30 avec le moyen de purge constitué par le passage 33, 34, 35 et facilite l'action du moyen de rappel qui permet de ramener le piston 9 en position haute en appui contre la butée 11. Ce moyen de rappel est une contre-pression de fluide qui s'établit dans la zone annulaire 36 à l'intérieur du cylindre, dans sa partie inférieure, au dessous de la zone de portée du piston 9. Pour cela, au moins un passage 37 est ménagé dans la paroi du corps 2 du dispositif 1 pour mettre en communication directe ou indirecte les canalisations secondaires 27, 28 avec au moins un perçage radial 38 réalisé à travers la paroi du cylindre 10. Ainsi la fermeture de l'obturateur 13 et la purge de la chambre de poussée 30 s'assompagnent du rappel en butée du piston 9.The opening of the passage between the frustoconical surfaces 19, 20 places the thrust chamber 30 in communication with the purging means constituted by the passage 33, 34, 35 and facilitates the action of the return means which makes it possible to return the piston 9 in the high position in abutment against the stop 11. This return means is a fluid back pressure which is established in the annular zone 36 inside the cylinder, in its lower part, below the range of the piston 9. For this, at least one passage 37 is formed in the wall of the body 2 of the device 1 to put in direct or indirect communication the secondary pipes 27, 28 with at least one radial bore 38 produced through the wall of the cylinder 10 Thus closing the shutter 13 and purging of the thrust chamber 30 are accompanied by the return in abutment of the piston 9.

La deuxième phase du cycle met en relation par la voie B2 les canalisations secondaires 27, 28 avec l'air libre, ce qui provoque la purge du fluide en superpression contenu dans la zone supérieure 31 du logement 15 et dans la zone annulaire 36. Dans ces conditions, la poussée exercée par le fluide provenant de la source P suivant la canalisation primaire A1, poussée qui s'exerce sur le bord annulaire 16 de l'obturateur 13, provoque son ouverture et chasse le piston 9 qui entraîne brutalement la pointe de marquage 5 en direction de la pièce à marquer. Afin d'éviter un choc trop brutal entre la partie inférieure du piston et le bord du passage 4 traversé par la pointe 5, on munit l'entrée de ce passage d'une zone d'entrée 39 de diamètre accru dans laquelle s'engage, avec un faible jeu, un prolongement 40 du piston 9 en fin de course aller. La compression du fluide par ce prolongement 40 dans cette zone d'entrée 39 assure un freinage efficace de l'outil 3 quant la pointe de marquage 5 ne rencontre pas la pièce à marquer. La pointe de marquage 5 est avantageusement réalisée en un carbure métallique, pour l'extrémité affutée au moins.The second phase of the cycle connects the secondary pipes 27, 28 with the open air via the path B2, which causes the purging of the superposed fluid contained in the upper zone 31 of the housing 15 and in the annular zone 36. In these conditions, the thrust exerted by the fluid coming from the source P along the primary pipe A1, thrust which is exerted on the annular edge 16 of the shutter 13, causes its opening and drives out the piston 9 which brutally drives the tip of marking 5 in the direction of the part to be marked. In order to avoid too sudden a shock between the lower part of the piston and the edge of the passage 4 crossed by the point 5, the entry of this passage is provided with an entry area 39 of increased diameter in which engages , with a small clearance, an extension 40 of the piston 9 at the end of the outward travel. The compression of the fluid by this extension 40 in this entry zone 39 ensures effective braking of the tool 3 when the marking tip 5 does not meet the part to be marked. The marking tip 5 is advantageously made of a metal carbide, for the sharpened end at least.

Dès l'achèvement de cette deuxième phase du cycle opératoire, un nouveau cycle est mis en route. Dans la pratique, on ajuste la fréquence de fonctionnement des moyens de commande cyclique CC du dispositif de marquage, de façon à ce que la durée de chaque cycle soit ajustable dans un intervalle de temps de l'ordre de 10 à 50 ms.As soon as this second phase of the operating cycle is completed, a new cycle is started. In practice, the operating frequency of the cyclic control means CC of the marking device is adjusted, so that the duration of each cycle is adjustable in a time interval of the order of 10 to 50 ms.

On peut réaliser le rappel en retour du piston 9 par un autre moyen que par l'action du fluide sous pression. On peut en particulier, comme montré en fig. 2, rappeler ce piston par détente d'un ressort hélicoïdal 41 entourant le piston 9 au-dessous de sa zone de portée, ressort 41 dont la poussée axiale est déterminée de façon à assurer le rappel dès que la purge de la chambre de poussée 30 est réalisée ; comme montré en fig. 2, ce ressort hélicoïdal 41 prend appui par son extrémité inférieure sur la paroi intérieure du logement du cylindre 10, dans la zone annulaire 42 au voisinage de l'extrémité inférieure de celui-ci et, par son extrémité supérieure, contre la paroi du piston 9 dans la zone annulaire 43 un peu au dessous de la zone de portée. On peut alors supprimer le passage 37 dans la paroi du corps 2, ainsi que les perçages 38 à travers la paroi du cylindre 10 ou encore maintenir ce passage 37 et ces perçages 38 comme dans le cas de fig. 2.The return of the piston 9 can be carried out by another means than by the action of the pressurized fluid. One can in particular, as shown in fig. 2, return this piston by expansion of a helical spring 41 surrounding the piston 9 below its bearing area, spring 41 whose axial thrust is determined so as to ensure the return as soon as the purge of the thrust chamber 30 is carried out; as shown in fig. 2, this helical spring 41 bears by its lower end on the inner wall of the cylinder housing 10, in the annular zone 42 in the vicinity of the lower end thereof and, by its upper end, against the wall of the piston 9 in the annular zone 43 a little below the range zone. We can then remove the passage 37 in the wall of the body 2, as well as the holes 38 to through the wall of the cylinder 10 or else maintain this passage 37 and these bores 38 as in the case of FIG. 2.

Claims (9)

Dispositif de marquage par micro-percussion, du genre comportant une pointe de marquage (5) actionnée par un fluide sous pression, caractérisé en ce que la pointe (5) est solidaire d'un piston (9), logé dans un cylindre (10) et surmonté par une chambre de poussée (30) qui, à travers une canalisation primaire (A1) et un passage équipé d'un obturateur (13), est reliée à une source de pression (P) de sorte qu'en position d'ouverture ledit obturateur permet la poussée, par le fluide, du piston (9) et de la pointe de marquage (5) en direction de la pièce à marquer, tandis que des moyens de commande cyclique (CC) permettent de relier, dans une première phase, au moins une canalisation secondaire (27, 28) raccordée au logement (15) dans lequel est engagé coulissant l'obturateur (13), avec la source (P) en provoquant ainsi le déplacement de l'obturateur en position de fermeture, des moyens de rappel provoquant simultanément la remontée du piston (9) dans son cylindre (10) en position de départ, les moyens de commande cyclique (CC) reliant dans une deuxième phase la canalisation secondaire (27, 28) à l'air libre, autorisant ainsi le déplacement de l'obturateur en position d'ouverture et la poussée par le fluide sous pression de la pointe de marquage (5) en direction de la pièce à marquer, les moyens de commande cyclique (CC) opérant ensuite la reproduction à une fréquence déterminée de ce cycle opératoire.Marking device by micro-percussion, of the type comprising a marking point (5) actuated by a pressurized fluid, characterized in that the point (5) is integral with a piston (9), housed in a cylinder (10 ) and surmounted by a thrust chamber (30) which, through a primary pipe (A1) and a passage equipped with a shutter (13), is connected to a pressure source (P) so that in position d opening said shutter allows the thrust, by the fluid, of the piston (9) and of the marking tip (5) towards the part to be marked, while cyclic control means (CC) make it possible to connect, in a first phase, at least one secondary pipe (27, 28) connected to the housing (15) in which is engaged slidingly the shutter (13), with the source (P) thereby causing the displacement of the shutter in the closed position , return means simultaneously causing the piston (9) to rise in its cylinder (10) e n starting position, the cyclic control means (CC) connecting in a second phase the secondary pipe (27, 28) to the open air, thus authorizing the movement of the shutter in the open position and the thrust by the fluid under pressure from the marking tip (5) in the direction of the workpiece to be marked, the cyclic control means (CC) then operating the reproduction at a determined frequency of this operating cycle. Dispositif suivant la revendication 1, caractérisé en ce que l'obturateur (13) et son logement (15) ont une forme de révolution axée sur l'axe -(X1-X1) du cylindre (10) et du piston (9), le bord inférieur (16) de cet obturateur (13) étant apte d'une part à venir, en position de fermeture, en contact étanche avec le bord supérieur (17) du cylindre (10), d'autre part à s'écarter du bord (17) du cylindre (10) en position d'ouverture, lorsque la canalisation secondaire (27, 28) est reliée à l'air libre.Device according to claim 1, characterized in that the shutter (13) and its housing (15) have a shape of revolution centered on the axis - (X1-X1) of the cylinder (10) and of the piston (9), the lower edge (16) of this shutter (13) being able on the one hand to come, in the closed position, in sealed contact with the upper edge (17) of the cylinder (10), on the other hand to move away from the edge (17) of the cylinder (10) in the open position, when the secondary pipe (27, 28) is connected to the open air. Dispositif suivant la revendication 2, caractérisé en ce que la surface transversale de la paroi (24) de l'obturateur (13) qui est soumise à la poussée du fluide de commande dans la zone supérieure (31) du logement (15), est plus grande que la surface transversale de la paroi inférieure (16) de ce même obturateur (13), qui en position d'ouverture est soumise à la poussée du fluide primaire.Device according to claim 2, characterized in that the transverse surface of the wall (24) of the shutter (13) which is subjected to the thrust of the control fluid in the upper zone (31) of the housing (15), is larger than the cross-sectional area of the bottom wall (16) of the same shutter (13), which in the open position is subjected to the thrust of the primary fluid. Dispositif suivant l'une quelconque des revendications 2 ou 3, caractérisé en ce qu'un passage (33, 34, 35) relie à l'air libre la chambre de poussée (30), l'obturateur (13) comportant un moyen de contrôle (19, 20) de ce passage qui est ouvert lorsque l'obturateur est fermé en appui contre le bord supérieur (17) du cylindre (10), et qui est au contraire fermé lorsque l'obturateur (13) est en position d'ouverture.Device according to either of Claims 2 and 3, characterized in that a passage (33, 34, 35) connects the thrust chamber (30) to the open air, the shutter (13) comprising a means of control (19, 20) of this passage which is open when the shutter is closed in abutment against the upper edge (17) of the cylinder (10), and which is on the contrary closed when the shutter (13) is in position d 'opening. Dispositif suivant la revendication 4, caractérisé en ce que le moyen pour le contrôle du passage (33, 34, 35) entre la chambre de poussée (30) et l'air libre est une portée d'étanchéité ménagée entre une paroi annulaire (19) de l'obturateur (13) et une paroi annulaire (20) d'une pièce (21) reliée à la partie supérieure (16) du dispositif par une pièce fixe (22) qui contient la liaison à l'air libre (33, 34, 35) du passage ainsi contrôlé par l'obturateur.Device according to claim 4, characterized in that the means for controlling the passage (33, 34, 35) between the thrust chamber (30) and the open air is a sealing surface formed between an annular wall (19 ) of the shutter (13) and an annular wall (20) of a part (21) connected to the upper part (16) of the device by a fixed part (22) which contains the connection to the open air (33 , 34, 35) of the passage thus controlled by the shutter. Dispositif suivant l'une quelconque des revendications 3 à 5, caractérisé en ce que la paroi supérieure (24) de l'obturateur (13) soumise à la pression du fluide de commande pénétrant dans la zone supérieure (31) du logement (15) comporte un bord annulaire muni d'un logement annulaire (26) contenant un joint d'étanchéité (25) monté en appui coulissant sur la paroi cylindrique de révolution de la pièce fixe (22).Device according to any one of Claims 3 to 5, characterized in that the upper wall (24) of the shutter (13) subjected to the pressure of the control fluid penetrating into the upper zone (31) of the housing (15) comprises an annular edge provided with an annular housing (26) containing a seal (25) mounted in sliding support on the cylindrical wall of revolution of the fixed part (22). Dispositif suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que le moyen de rappel du piston (9) comprend au moins un perçage (38) traversant la paroi du cylindre (10) au voisinage de son extrémité inférieure et au moins un passage (37) reliant ce perçage, de façon directe ou indirecte, à au moins une canalisation secondaire (27, 28).Device according to any one of Claims 1 to 6, characterized in that the piston return means (9) comprises at least one bore (38) passing through the wall of the cylinder (10) in the vicinity of its lower end and at least a passage (37) connecting this bore, directly or indirectly, to at least one secondary pipe (27, 28). Dispositif suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que le moyen de rappel du piston (9) est un ressort hélicoïdal (41) qui est logé dans la partie inférieure du cylindre (10) autour du piston (9), dans sa zone de raccordement avec la pointe de marquage (5), lequel ressort est orienté suivant l'axe de l'outil de marquage (3) en prenant appui par son extrémité inférieure contre la zone annulaire (42) dans le bas du logement du cylindre (10), par son extrémité supérieure, contre la paroi du piston (9) dans la zone annulaire (43) juste au dessous de la zone de portée.Device according to any one of Claims 1 to 6, characterized in that the piston return means (9) is a helical spring (41) which is housed in the lower part of the cylinder (10) around the piston (9) , in its zone of connection with the marking point (5), which spring is oriented along the axis of the marking tool (3) bearing by its lower end against the annular zone (42) at the bottom of the cylinder housing (10), by its upper end, against the wall of the piston (9) in the annular zone (43) just below the bearing zone. Dispositif suivant l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il comporte une butée (11) qui limite la course de rappel du piston (9) et un joint d'étanchéité annulaire (12) logé dans une gorge ménagée dans la paroi intérieure du cylindre (10), au voisinage de son bord supérieur (17), pour assurer une liaison étanche avec le piston (9) lorsque celui-ci est en appui contre la butée (11).Device according to any one of Claims 1 to 8, characterized in that it comprises a stop (11) which limits the return stroke of the piston (9) and an annular seal (12) housed in a groove formed in the inner wall of the cylinder (10), in the vicinity of its upper edge (17), to ensure a sealed connection with the piston (9) when the latter is in abutment against the stop (11).
EP92420134A 1991-04-23 1992-04-22 Device for marking by micro-percussion Expired - Lifetime EP0511133B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9105350A FR2675743B1 (en) 1991-04-23 1991-04-23 MARKING PEN.
FR9105350 1991-04-23

Publications (2)

Publication Number Publication Date
EP0511133A1 true EP0511133A1 (en) 1992-10-28
EP0511133B1 EP0511133B1 (en) 1995-01-04

Family

ID=9412423

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Application Number Title Priority Date Filing Date
EP92420134A Expired - Lifetime EP0511133B1 (en) 1991-04-23 1992-04-22 Device for marking by micro-percussion

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EP (1) EP0511133B1 (en)
DE (1) DE69201092T2 (en)
ES (1) ES2066587T3 (en)
FR (1) FR2675743B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8328097B2 (en) 2010-08-24 2012-12-11 GM Global Technology Operations LLC Multi-purpose appendable marking method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006022166B4 (en) * 2006-05-12 2008-08-07 Nc-Automation Gmbh Scratch marking tool for NC machines and robots
DE102007011393A1 (en) * 2007-03-07 2008-09-11 Nc-Automation Gmbh Characterizing tool for characterizing workpieces in numerically controlled machines comprises a compression chamber connected to a supply line for a compressed medium via a supply throttle
FR3058922B1 (en) * 2016-11-21 2019-07-26 Gravotech Marking MARKING TOOL AND MARKING MACHINE COMPRISING SUCH A TOOL
DE102017128475B4 (en) * 2017-11-30 2019-07-04 Rattunde Ag Method for operating a marking head with pressure sensor

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US3032013A (en) * 1960-12-07 1962-05-01 Gardner Denver Co Percussive tool
US3524385A (en) * 1966-07-11 1970-08-18 Impulse Prod Corp Control means for fluid-powered devices
WO1981001447A1 (en) * 1979-11-19 1981-05-28 P Toernqvist Apparatus generating a reciprocating motion
DE3247577A1 (en) * 1982-12-22 1984-07-05 Helmut 8012 Ottobrunn Schreiner Pneumatic marking unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3032013A (en) * 1960-12-07 1962-05-01 Gardner Denver Co Percussive tool
US3524385A (en) * 1966-07-11 1970-08-18 Impulse Prod Corp Control means for fluid-powered devices
WO1981001447A1 (en) * 1979-11-19 1981-05-28 P Toernqvist Apparatus generating a reciprocating motion
DE3247577A1 (en) * 1982-12-22 1984-07-05 Helmut 8012 Ottobrunn Schreiner Pneumatic marking unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8328097B2 (en) 2010-08-24 2012-12-11 GM Global Technology Operations LLC Multi-purpose appendable marking method

Also Published As

Publication number Publication date
DE69201092D1 (en) 1995-02-16
FR2675743B1 (en) 1993-07-16
ES2066587T3 (en) 1995-03-01
FR2675743A1 (en) 1992-10-30
EP0511133B1 (en) 1995-01-04
DE69201092T2 (en) 1995-05-11

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