EP0528728A1 - Device for rotating the spindles of a polishing barrel - Google Patents

Device for rotating the spindles of a polishing barrel Download PDF

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Publication number
EP0528728A1
EP0528728A1 EP92402288A EP92402288A EP0528728A1 EP 0528728 A1 EP0528728 A1 EP 0528728A1 EP 92402288 A EP92402288 A EP 92402288A EP 92402288 A EP92402288 A EP 92402288A EP 0528728 A1 EP0528728 A1 EP 0528728A1
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EP
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Prior art keywords
drum
pinion
rotation
shaft
gear wheel
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Granted
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EP92402288A
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German (de)
French (fr)
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EP0528728B1 (en
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Bernard Coron
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/02—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels
    • B24B31/0224—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels the workpieces being fitted on a support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/02—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels
    • B24B31/0212—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels the barrels being submitted to a composite rotary movement
    • B24B31/0218—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels the barrels being submitted to a composite rotary movement the barrels are moving around two parallel axes, e.g. gyratory, planetary movement

Definitions

  • the present invention relates to a method and a device for rotating a polishing barrel, more particularly intended for the polishing of spectacle frames, watch cases and other similar metallic objects.
  • polishing of metal spectacle frames can be carried out in a homogeneous manner only by means of a polishing barrel comprising a system of pins driven in rotation around a coaxial shaft of a drum containing a load.
  • abrasive usually made of vegetable shot coated with abrasive cream; the pins are fitted with elastic pins or the like used to support the mounts inside the barrel one by one.
  • drive systems have been developed using chains, belts or the like making it possible to move the spindles and the barrel as a whole using one or more drive members.
  • the effectiveness of polishing depends mainly on the speed of movement of the metal parts through the load, also called residual speed, which is given by the difference between the speed of fall of the abrasive load inside the drum, taken at the spindles (proportional to the speed of rotation of the drum) and the tangential speed of the mounts to be polished (proportional to the speed of rotation of the spindles on themselves).
  • residual speed the speed of movement of the metal parts through the load
  • residual speed is given by the difference between the speed of fall of the abrasive load inside the drum, taken at the spindles (proportional to the speed of rotation of the drum) and the tangential speed of the mounts to be polished (proportional to the speed of rotation of the spindles on themselves).
  • the present invention aims to remedy these drawbacks by proposing a method for rotating a polishing barrel, more particularly intended for the polishing of spectacle frames, watch cases and other similar fixed metallic objects.
  • a method for rotating a polishing barrel more particularly intended for the polishing of spectacle frames, watch cases and other similar fixed metallic objects.
  • peripheral spindles of a drum closed at both ends and at the bottom of which is placed an abrasive load, this process being characterized in that said spindles are rotated after a delay time, if necessary adjustable, relative to when said drum is rotated, this time must be less than or equal to that which is necessary for balancing the load inside the drum. This balance is obtained when the drop of the load inside the drum forms a regular flow flowing smoothly.
  • the invention also provides a drive device comprising at least one main pinion around which is wound an endless chain driven by the drive member so as to rotate the drum shaft, at least one secondary gear mounted idly around this shaft and cooperating with an eccentric pinion, coaxial with a secondary shaft fixed on one of the side blanks for closing the drum, at least one return pinion, integral with the same shaft as the eccentric pinion and cooperating with a set of pinions for driving the axes of rotation of the spindles, this device being characterized in that the secondary pinion, or at least one disc of a gear directly linked to this secondary pinion, comprises at least one lateral projecting index capable of abutting against at least one fixed cleat by r contribution to the drum so as to stop the rotation of said secondary pinion and to cause the rotation of the pinion drive pinions in phase shift after the rotation of the drum.
  • the secondary shaft is driven around the main shaft, which causes the secondary pinion to rotate until its index finger abuts against the corresponding cleat; because the secondary pinion can no longer rotate, the eccentric pinion is driven on itself, which causes the rotation of the return pinion integral with the same shaft and, consequently, that of the pinion drive pinions.
  • the secondary pinion becomes free to rotate because the index which is connected to it is far from its cleat; therefore, only the drum rotates and the pins are stationary.
  • the secondary pinion is immobilized, which causes the spindles to rotate in reverse as described above.
  • the polishing barrel shown in the figures is assembled around a frame 1 comprising two similar legs 2 supporting, in the upper part, the rotation shaft 3 of a drum 4, for example of decagonal cross section, closed in both. ends by blanks 5 to contain an abrasive load 6. Assembled across the drum 4 to extend between the two blanks 5 at a certain distance from its rotation shaft 3, a number of axes 7, angularly distributed by regularly support pins 8 used, using pins or the like, to hold objects of metal to be polished.
  • This secondary shaft 16 is fixed, through bearings, to a bracket 17 integral with one of the blanks 5 for closing the drum 4, and also comprises a co-operating gear 18 by means of a secondary chain without end 19, with all of the drive pinions 20 fixed to the ends of the axes 7 of the pins 8 to allow them to rotate. It will also be noted that a certain number of ball tensioning rollers 21 are arranged between certain drive pinions 20 of the pins 8 so that the secondary chain 19 is tensioned and can drive said pinions 20 firmly.
  • the overall tension of the secondary chain 19 can be adjusted by means of the displacement of the axis of rotation of a tensioning pinion 22 along a radius of the closing blank 5 of the drum 4 on which are fixed the various gears of the system d 'training.
  • the operation of the polishing barrel would be as follows: when the drive member 12 rotates, the drive chain 10 tightens and positively drives the main pinion 9 secured to the shaft 3 of the drum 4, the latter thus starting to turn. Therefore, the bracket 17 supporting the shaft secondary 16 is rotated around the shaft 3. On the other hand, as the abrasive load 6 opposes the rotation on themselves of the pins 8 which are embedded therein at the bottom of the drum 4, also well the drive sprockets 20 of all the spindles 8 that the return sprocket 18 and the eccentric sprocket 15 cannot rotate around their axes 7 and the secondary shaft 16, respectively.
  • the secondary pinion 13 is secured to a gear wheel 23 also idly mounted on the rotation shaft 3 of the drum 4, this gear wheel 23 cooperating, via an endless auxiliary chain 24, with a second gear wheel 25, with an axis fixed relative to the frame 1.
  • This second gear wheel 25 comprises, in the variant shown in the figures , a first lateral projecting index 26 on one of its faces capable of abutting against a first stop cleat 27 arranged on said frame 1, and a second lateral projecting index 28 on its other face, capable of coming into abutment against a second cleat 29, arranged on the frame 1 in angular offset relative to said first cleat 27.
  • the speed of rotation of the spindles 8 depends solely on the gear ratios of the end gears 9 and 20 and it is proportional to the speed of rotation of the drum 4.
  • the gear wheel 25 carrying the indexes 26 and 28 is mounted idly around an axis fixed to the frame 1 which, for practical reasons of simplification, is the same as the shaft of the drive member 12 driving the main pinion 9 via the drive chain 10.
  • a polishing barrel was produced in accordance with the invention comprising ten pins 8 each supporting forty spectacle frames for a total capacity of 400 frames.
  • the drum 4 rotates at the speed of 20 revolutions / minute, while the pins 8 are driven on themselves at 47 revolutions / minute; the polishing time, with an abrasive load 7 formed of vegetable shot coated with abrasive cream, was thus able to be reduced by half (that is to say 5 hours) compared to a polishing carried out in conventional barrel for which it is not possible to '' animate pins 8 beyond a speed of 7 revolutions / minute. It is understood in particular that the efficiency of the polishing, which depends directly on the residual speed as defined above, is effectively greatly improved.

Abstract

The present invention relates to a method and a device for rotating a polishing barrel more particularly intended for polishing spectacles frames, watch cases and other similar metal objects fastened onto peripheral spindles (8) of a drum (4) closed at its two ends, and in the bottom of which is placed an abrasive load (6). The method is characterised in that the said spindles (8) are rotated with a time delay, adjustable if appropriate, with respect to the rotation of the said drum (4), it being necessary for this time to be less than or equal to that which is necessary for bringing the said load (6) into equilibrium inside the drum (4). <IMAGE>

Description

La présente invention concerne un procédé et un dispositif pour la mise en rotation d'un tonneau de polissage plus particulièrement destiné au polissage de montures de lunettes, de boîtiers de montres et autres objets métalliques analogues.The present invention relates to a method and a device for rotating a polishing barrel, more particularly intended for the polishing of spectacle frames, watch cases and other similar metallic objects.

On sait que le polissage des montures de lunettes métalliques ne peut être réalisé d'une manière homogène qu'au moyen d'un tonneau de polissage comprenant un système de broches entraînées en rotation autour d'un arbre coaxial d'un tambour contenant une charge abrasive, généralement formée de grenaille végétale enduite de crème abrasive ; les broches sont équipées d'épingles élastiques ou analogues servant à soutenir une à une les montures à l'intérieur du tonneau. Afin de réduire la durée nécessaire au polissage, ainsi que d'améliorer l'aspect de surface des montures qui doit être le plus brillant possible, on a imaginé d'entraîner également les broches en rotation sur elles-mêmes. A cet effet, il a été développé des systèmes d'entraînement par chaînes, courroies ou analogues permettant de faire se mouvoir les broches et le tonneau dans son ensemble à l'aide d'un ou de plusieurs organes moteurs. Par exemple, dans le brevet FR-2 479 727, il est décrit un appareil de polissage du type à cages comportant deux organes moteurs, l'un pour l'entraînement du tambour et l'autre pour le contrôle de la position et de la rotation relatives des cages ou broches par rapport au tambour. Il est clair cependant qu'une telle disposition est coûteuse et qu'en général, il est préférable d'équiper les tonneaux de polissage au moyen d'un unique moteur, la rotation des broches étant commandées par la rotation du tambour au travers d'une pignonnerie adaptant leurs vitesses respectives en fonction de l'efficacité de polissage souhaité.It is known that the polishing of metal spectacle frames can be carried out in a homogeneous manner only by means of a polishing barrel comprising a system of pins driven in rotation around a coaxial shaft of a drum containing a load. abrasive, usually made of vegetable shot coated with abrasive cream; the pins are fitted with elastic pins or the like used to support the mounts inside the barrel one by one. In order to reduce the time necessary for polishing, as well as to improve the surface appearance of the frames which must be as shiny as possible, it has been imagined also to drive the spindles in rotation on themselves. To this end, drive systems have been developed using chains, belts or the like making it possible to move the spindles and the barrel as a whole using one or more drive members. For example, in patent FR-2,479,727, there is described a polishing apparatus of the cage type comprising two motor members, one for driving the drum and the other for controlling the position and relative rotation of the cages or spindles relative to the drum. It is clear however that such an arrangement is expensive and that in general it is preferable to equip the polishing barrels by means of a single motor, the rotation of the spindles being controlled by the rotation of the drum through a gearbox adapting their respective speeds according to the desired polishing efficiency.

A cet égard, on rappelle que l'efficacité du polissage dépend principalement de la vitesse de déplacement des pièces métalliques au travers de la charge, encore appelée vitesse résiduelle, qui est donnée par la différence entre la vitesse de chute de la charge abrasive à l'intérieur du tambour, prise au niveau des broches (proportionnelle à la vitesse de rotation du tambour) et la vitesse tangentielle des montures à polir (proportionnelles à la vitesse de rotation des broches sur elles-mêmes). Afin d'augmenter l'efficacité du polissage, on pourrait imaginer de faire tourner le tambour plus vite, mais la charge subirait alors une force centrifuge trop importante avec la conséquence qu'étant plaquée contre les parois intérieures du tambour, elle retomberait vers son fond d'une manière fortement saccadée. On est donc conduit, pour un diamètre donné du tambour, à limiter sa vitesse de rotation. Dans ces conditions, pour améliorer l'efficacité du polissage, il convient d'augmenter la vitesse de rotation des broches sur elles-mêmes. Or, dans les systèmes actuels équipés d'un seul organe moteur, il n'est pas possible de démultiplier exagérément le rapport de transformation des vitesses de rotation du tonneau et des broches car il se poserait alors un problème de résistance mécanique des broches au démarrage du tonneau. En effet, à la mise en rotation du tambour au fond duquel la charge abrasive est initialement immobile, le couple résistant appliqué sur les broches du fait de l'inertie de la charge est très élevé ; par conséquent, comme toutes les broches sont mises en rotation simultanément avec le tambour, il est impossible de leur imprimer une vitesse de rotation pour laquelle les broches et les pièces métalliques à polir noyées dans la charge risqueraient de se déformer ou de céder ; on est ainsi naturellement conduit à limiter le rapport de transformation des vitesses donné par la pignonerie d'entraînement.In this regard, it is recalled that the effectiveness of polishing depends mainly on the speed of movement of the metal parts through the load, also called residual speed, which is given by the difference between the speed of fall of the abrasive load inside the drum, taken at the spindles (proportional to the speed of rotation of the drum) and the tangential speed of the mounts to be polished (proportional to the speed of rotation of the spindles on themselves). In order to increase the efficiency of the polishing, one could imagine turning the drum faster, but the load would then undergo too great a centrifugal force with the consequence that being pressed against the interior walls of the drum, it would fall towards its bottom in a strongly jerky manner. We are therefore led, for a given diameter of the drum, to limit its speed of rotation. Under these conditions, to improve the efficiency of polishing, it is necessary to increase the speed of rotation of the pins on themselves. However, in current systems equipped with a single drive member, it is not possible to increase the ratio of transformation of the rotation speeds of the barrel and the spindles excessively because there would then be a problem of mechanical resistance of the spindles at start-up. barrel. Indeed, when the drum is rotated at the bottom of which the abrasive load is initially stationary, the resistive torque applied to the pins due to the inertia of the load is very high; consequently, as all the pins are rotated simultaneously with the drum, it is impossible to impart to them a speed of rotation for which the pins and the metal parts to be polished embedded in the load would risk deforming or yielding; one is thus naturally led to limit the speed transformation ratio given by the drive gear.

La présente invention vise à remédier à ces inconvénients en proposant un procédé pour la mise en rotation d'un tonneau de polissage plus particulièrement destiné au polissage de montures de lunettes, de boîtiers de montres et autres objets métalliques analogues fixés sur des broches périphériques d'un tambour fermé à ses deux extrémités et dans le fond duquel est placée une charge abrasive, ce procédé étant caractérisé en ce que lesdites broches sont mises en rotation après un temps de retard, le cas échéant réglable, par rapport à la mise en rotation dudit tambour, ce temps devant être inférieur ou égal à celui qui est nécessaire à la mise en équilibre de la charge à l'intérieur du tambour. Cet équilibre est obtenu lorsque la chute de la charge à l'intérieur du tambour forme un flux régulier s'écoulant sans à-coups.The present invention aims to remedy these drawbacks by proposing a method for rotating a polishing barrel, more particularly intended for the polishing of spectacle frames, watch cases and other similar fixed metallic objects. on peripheral spindles of a drum closed at both ends and at the bottom of which is placed an abrasive load, this process being characterized in that said spindles are rotated after a delay time, if necessary adjustable, relative to when said drum is rotated, this time must be less than or equal to that which is necessary for balancing the load inside the drum. This balance is obtained when the drop of the load inside the drum forms a regular flow flowing smoothly.

Afin de mettre en oeuvre ce procédé au moyen d'un tonneau de polissage pourvu d'un seul organe moteur, entraînant à la fois le tambour et les broches, l'invention propose également un dispositif d'entraînement comportant au moins un pignon principal autour duquel s'enroule une chaîne sans fin mue par l'organe moteur de sorte à entraîner en rotation l'arbre du tambour, au moins un pignon secondaire monté fou autour de cet arbre et coopérant avec un pignon excentré, coaxial d'un arbre secondaire fixé sur l'un des flans latéraux de fermeture du tambour, au moins un pignon de renvoi, solidaire du même arbre que le pignon excentré et coopérant avec un ensemble de pignons d'entraînement des axes de rotation des broches, ce dispositif étant caractérisé en ce que le pignon secondaire, ou au moins un disque d'un engrenage directement lié à ce pignon secondaire, comporte au moins un index saillant latéral susceptible de venir en butée contre au moins un taquet fixe par rapport au tambour de sorte à stopper la rotation dudit pignon secondaire et à provoquer la mise en rotation des pignons d'entraînement des broches en déphasage après la mise en rotation du tambour.In order to implement this method by means of a polishing barrel provided with a single motor member, driving both the drum and the spindles, the invention also provides a drive device comprising at least one main pinion around which is wound an endless chain driven by the drive member so as to rotate the drum shaft, at least one secondary gear mounted idly around this shaft and cooperating with an eccentric pinion, coaxial with a secondary shaft fixed on one of the side blanks for closing the drum, at least one return pinion, integral with the same shaft as the eccentric pinion and cooperating with a set of pinions for driving the axes of rotation of the spindles, this device being characterized in that the secondary pinion, or at least one disc of a gear directly linked to this secondary pinion, comprises at least one lateral projecting index capable of abutting against at least one fixed cleat by r contribution to the drum so as to stop the rotation of said secondary pinion and to cause the rotation of the pinion drive pinions in phase shift after the rotation of the drum.

Ainsi, à la mise en rotation du tambour, l'arbre secondaire est entraîné autour de l'arbre principal, ce qui provoque la mise en rotation du pignon secondaire jusqu'à ce que son index vienne en butée contre le taquet lui correspondant ; du fait que le pignon secondaire ne peut alors plus tourner, le pignon excentré est entraîné sur lui-même, ce qui provoque la mise en rotation du pignon de renvoi solidaire du même arbre et, par conséquent, celle des pignons d'entraînement des broches.Thus, when the drum is rotated, the secondary shaft is driven around the main shaft, which causes the secondary pinion to rotate until its index finger abuts against the corresponding cleat; because the secondary pinion can no longer rotate, the eccentric pinion is driven on itself, which causes the rotation of the return pinion integral with the same shaft and, consequently, that of the pinion drive pinions.

De même, lorsque, pour des raisons d'homogénéisation du polissage des objets se trouvant sur les broches, le sens de la rotation du tambour est inversé, le pignon secondaire devient libre en rotation car l'index qui lui est relié est éloigné de son taquet ; de ce fait, seul le tambour tourne et les broches sont immobiles. Après une rotation d'angle également contrôlable par le biais du même index et du même taquet pris à l'envers (rotation du pignon secondaire d'environ un tour), ou par le biais d'un second index coopérant avec un second taquet fixe par rapport au tambour, le pignon secondaire est immobilisé, ce qui provoque la mise en rotation inversée des broches de la manière décrite plus haut.Similarly, when, for reasons of homogenization of the polishing of objects on the spindles, the direction of rotation of the drum is reversed, the secondary pinion becomes free to rotate because the index which is connected to it is far from its cleat; therefore, only the drum rotates and the pins are stationary. After a rotation of angle also controllable by means of the same index and the same cleat taken upside down (rotation of the secondary pinion by about one turn), or by means of a second index cooperating with a second fixed cleat relative to the drum, the secondary pinion is immobilized, which causes the spindles to rotate in reverse as described above.

D'autres caractéristiques et avantages de la présente invention ressortiront mieux de la description qui va suivre d'un mode d'exécution d'un tonneau de polissage donné à titre d'exemple non limitatif en référence au dessin annexé sur lequel :

  • la figure 1 est une vue en perspective partiellement éclatée du tonneau,
  • la figure 2 est une vue en élévation frontale du tambour, montrant schématiquement la disposition des butées et des index coopérant pour retarder la mise en rotation des broches.
Other characteristics and advantages of the present invention will emerge more clearly from the following description of an embodiment of a polishing barrel given by way of nonlimiting example with reference to the appended drawing in which:
  • FIG. 1 is a partially exploded perspective view of the barrel,
  • Figure 2 is a front elevational view of the drum, schematically showing the arrangement of the stops and indexes cooperating to delay the rotation of the spindles.

Le tonneau de polissage représenté sur les figures est assemblé autour d'un bâti 1 comportant deux piètements similaires 2 supportant, en partie haute, l'arbre de rotation 3 d'un tambour 4, par exemple de section droite décagonale, fermé à ses deux extrémités par des flans 5 pour contenir une charge abrasive 6. Assemblés en travers du tambour 4 pour s'étendre entre les deux flans 5 à une certaine distance de son arbre de rotation 3, un certain nombre d'axes 7, angulairement répartis d'une manière régulière, supportent des broches 8 servant, à l'aide d'épingles ou analogues, à maintenir des objets métalliques à polir.The polishing barrel shown in the figures is assembled around a frame 1 comprising two similar legs 2 supporting, in the upper part, the rotation shaft 3 of a drum 4, for example of decagonal cross section, closed in both. ends by blanks 5 to contain an abrasive load 6. Assembled across the drum 4 to extend between the two blanks 5 at a certain distance from its rotation shaft 3, a number of axes 7, angularly distributed by regularly support pins 8 used, using pins or the like, to hold objects of metal to be polished.

Après chargement des broches 8, celles-ci sont mues en rotation sur elles-mêmes en même temps que le tambour 4 tourne autour de l'arbre 3. A cet effet, ce dernier est pourvu, extérieurement au tambour 4, d'un pignon principal 9 autour duquel vient s'enrouler une chaîne moteur sans fin 10 mue par un pignon d'entraînement 11 monté coaxial sur l'arbre d'un organe moteur 12 à fort couple. Complémentairement, un pignon secondaire 13, monté fou autour de l'arbre de rotation 3 par le biais de roulements à billes, et qui n'est donc pas entraîné positivement par l'organe moteur 12, coopère, par l'intermédiaire d'une chaîne intermédiaire sans fin 14, avec un pignon excentré 15 coaxial d'un arbre secondaire 16 dont il est solidaire. Cet arbre secondaire 16 est fixé, au travers de roulements, sur une équerre 17 solidaire de l'un des flans 5 de fermeture du tambour 4, et comporte également un pignon de renvoi 18 coopérant, par l'intermédiaire d'une chaîne secondaire sans fin 19, avec l'ensemble des pignons d'entraînement 20 fixés aux extrémités des axes 7 des broches 8 pour permettre leur mise en rotation. On notera également qu'un certain nombre de galets tendeurs à billes 21 sont aménagés entre certains pignons d'entraînement 20 des broches 8 de manière que la chaîne secondaire 19 soit tendue et puisse entraîner fermement lesdits pignons 20. A cet égard, la tension globale de la chaîne secondaire 19 peut être réglée par l'intermédiaire du déplacement de l'axe de rotation d'un pignon tendeur 22 le long d'un rayon du flan de fermeture 5 du tambour 4 sur lequel sont fixés les divers engrenages du système d'entraînement.After loading the pins 8, these are rotated on themselves at the same time as the drum 4 rotates around the shaft 3. For this purpose, the latter is provided, outside the drum 4, with a pinion main 9 around which comes to wind an endless motor chain 10 driven by a drive pinion 11 mounted coaxially on the shaft of a motor member 12 with high torque. As a complement, a secondary pinion 13, mounted idly around the rotation shaft 3 by means of ball bearings, and which is therefore not positively driven by the drive member 12, cooperates, by means of a endless intermediate chain 14, with an eccentric pinion 15 coaxial with a secondary shaft 16 to which it is integral. This secondary shaft 16 is fixed, through bearings, to a bracket 17 integral with one of the blanks 5 for closing the drum 4, and also comprises a co-operating gear 18 by means of a secondary chain without end 19, with all of the drive pinions 20 fixed to the ends of the axes 7 of the pins 8 to allow them to rotate. It will also be noted that a certain number of ball tensioning rollers 21 are arranged between certain drive pinions 20 of the pins 8 so that the secondary chain 19 is tensioned and can drive said pinions 20 firmly. In this respect, the overall tension of the secondary chain 19 can be adjusted by means of the displacement of the axis of rotation of a tensioning pinion 22 along a radius of the closing blank 5 of the drum 4 on which are fixed the various gears of the system d 'training.

Ainsi constitué, le fonctionnement du tonneau de polissage serait le suivant : à la mise en rotation de l'organe moteur 12, la chaîne moteur 10 se tend et entraîne positivement le pignon principal 9 solidaire de l'arbre 3 du tambour 4, ce dernier se mettant donc à tourner. De ce fait, l'équerre 17 supportant l'arbre secondaire 16 est entraîné en rotation autour de l'arbre 3. D'un autre côté, comme la charge abrasive 6 s'oppose à la rotation sur elles-mêmes des broches 8 qui y sont noyées à la partie inférieure du tambour 4, aussi bien les pignons d'entraînement 20 de toutes les broches 8 que le pignon de renvoi 18 et le pignon excentré 15 ne peuvent tourner autour, respectivement, de leurs axes 7 et de l'arbre secondaire 16. Par conséquent, du fait que la chaîne intermédiaire 14 s'enroule autour du pignon excentré 15, le pignon secondaire 13, monté fou autour de l'arbre de rotation 3, se met à tourner sur lui-même. Comme rien n'est prévu pour arrêter sa rotation, on comprend que les broches 8 resteraient perpétuellement fixes et ne seraient jamais mises en rotation sur elles-mêmes.Thus constituted, the operation of the polishing barrel would be as follows: when the drive member 12 rotates, the drive chain 10 tightens and positively drives the main pinion 9 secured to the shaft 3 of the drum 4, the latter thus starting to turn. Therefore, the bracket 17 supporting the shaft secondary 16 is rotated around the shaft 3. On the other hand, as the abrasive load 6 opposes the rotation on themselves of the pins 8 which are embedded therein at the bottom of the drum 4, also well the drive sprockets 20 of all the spindles 8 that the return sprocket 18 and the eccentric sprocket 15 cannot rotate around their axes 7 and the secondary shaft 16, respectively. Consequently, the chain intermediate 14 is wound around the eccentric pinion 15, the secondary pinion 13, mounted idly around the rotation shaft 3, starts to rotate on itself. As nothing is provided to stop its rotation, it is understood that the pins 8 would remain perpetually fixed and would never be rotated on themselves.

Selon la variante d'exécution préférée de la présente invention, il est donc prévu que le pignon secondaire 13 soit solidarisé à une roue d'engrenage 23 également montée folle sur l'arbre de rotation 3 du tambour 4, cette roue d'engrenage 23 coopérant, par l'intermédiaire d'une chaîne auxiliaire sans fin 24, avec une seconde roue d'engrenage 25, d'axe fixe par rapport au bâti 1. Cette seconde roue d'engrenage 25 comporte, dans la variante représentée sur les figures, un premier index saillant latéral 26 sur l'une de ses faces susceptible de venir en butée contre un premier taquet d'arrêt 27 agencé sur ledit bâti 1, et un deuxième index saillant latéral 28 sur son autre face, susceptible de venir en butée contre un second taquet 29, agencé sur le bâti 1 en décalage angulaire par rapport audit premier taquet 27.According to the preferred embodiment of the present invention, it is therefore expected that the secondary pinion 13 is secured to a gear wheel 23 also idly mounted on the rotation shaft 3 of the drum 4, this gear wheel 23 cooperating, via an endless auxiliary chain 24, with a second gear wheel 25, with an axis fixed relative to the frame 1. This second gear wheel 25 comprises, in the variant shown in the figures , a first lateral projecting index 26 on one of its faces capable of abutting against a first stop cleat 27 arranged on said frame 1, and a second lateral projecting index 28 on its other face, capable of coming into abutment against a second cleat 29, arranged on the frame 1 in angular offset relative to said first cleat 27.

De cette façon, lorsqu'au démarrage du tambour 4, le pignon secondaire 13 est mis en rotation, ce dernier entraîne avec lui la roue d'engrenage 23 ; cette dernière, par l'intermédiaire de la chaîne auxiliaire 24, transmet sa rotation à la roue d'engrenage 25, amenant l'un des deux index 26 ou 28 contre leur taquet 27 ou 29 respectif, après un temps proportionnel à l'écart existant entre la position angulaire initiale de l'index 26, 28 et la position angulaire du taquet 27, 29. A partir du moment où la roue d'engrenage 25 est bloquée, l'ensemble formé par la roue d'engrenage 23 et le pignon secondaire 13 l'est également. Par conséquent, comme le tambour 4 continue pour sa part à tourner autour de l'arbre 3, la chaîne intermédiaire 14 force la rotation du pignon excentré 15 et, par là-même, celle de l'arbre secondaire 16 et du pignon de renvoi 18. Comme ce dernier est lié, par l'intermédiaire de la chaîne secondaire 19, à l'ensemble des pignons d'entraînement 20 fixés à l'extrémité des axes 7 des broches 8, ces dernières sont entraînées en rotation sur elles-mêmes.In this way, when the drum 4 starts when the secondary pinion 13 is rotated, the latter drives with it the gear wheel 23; the latter, via the auxiliary chain 24, transmits its rotation to the gear wheel 25, bringing one of the two indexes 26 or 28 against their respective cleat 27 or 29, after a time proportional to the difference existing between the initial angular position of the index 26, 28 and the angular position of the cleat 27, 29. From the moment when the gear wheel 25 is locked, the assembly formed by the gear wheel 23 and the secondary pinion 13 is also. Consequently, as the drum 4 continues for its part to rotate around the shaft 3, the intermediate chain 14 forces the rotation of the eccentric pinion 15 and, thereby, that of the secondary shaft 16 and of the return pinion 18. As the latter is linked, via the secondary chain 19, to all of the drive sprockets 20 fixed to the end of the axes 7 of the pins 8, the latter are driven in rotation on themselves .

Lorsque le sens de rotation du tambour 4 est inversé, l'index 26, 28 s'écarte de sa butée contre le taquet 27, 29 lui correspondant, provoquant à nouveau la rotation du pignon secondaire 13 et, par conséquent, l'arrêt des broches 8 qui n'ont pas l'inertie suffisante pour continuer à tourner dans la charge abrasive 6. Après une rotation amenant, par le même procédé, l'autre index 28, 26 en butée contre son taquet 29, 27, le pignon secondaire 13 s'arrête et les broches 8 sont à nouveau mises en rotation sur elles-mêmes. On notera également qu'entre chaque inversion du sens de rotation du tambour 4 et des broches 8, une temporisation réglable immobilise l'ensemble du tonneau.When the direction of rotation of the drum 4 is reversed, the index 26, 28 deviates from its abutment against the cleat 27, 29 corresponding to it, again causing the rotation of the secondary pinion 13 and, consequently, stopping the pins 8 which do not have sufficient inertia to continue to rotate in the abrasive load 6. After a rotation bringing, by the same process, the other index 28, 26 in abutment against its cleat 29, 27, the secondary pinion 13 stops and the pins 8 are again rotated on themselves. It will also be noted that between each reversal of the direction of rotation of the drum 4 and of the spindles 8, an adjustable delay immobilizes the entire barrel.

Bien entendu, la vitesse de rotation des broches 8 dépend uniquement des rapports d'engrenage des pignons extrêmes 9 et 20 et elle est proportionnelle à la vitesse de rotation du tambour 4.Of course, the speed of rotation of the spindles 8 depends solely on the gear ratios of the end gears 9 and 20 and it is proportional to the speed of rotation of the drum 4.

Selon une caractéristique complémentaire de la présente invention, la roue d'engrenage 25 portant les index 26 et 28 est montée folle autour d'un axe fixé au bâti 1 qui, pour des raisons pratiques de simplification, est le même que l'arbre de l'organe moteur 12 entraînant le pignon principal 9 par l'intermédiaire de la chaîne moteur 10.According to a complementary characteristic of the present invention, the gear wheel 25 carrying the indexes 26 and 28 is mounted idly around an axis fixed to the frame 1 which, for practical reasons of simplification, is the same as the shaft of the drive member 12 driving the main pinion 9 via the drive chain 10.

On a réalisé un tonneau de polissage conforme à l'invention comportant dix broches 8 supportant chacune quarante montures de lunettes pour une capacité totale de 400 montures. Dans cette réalisation, le tambour 4 tourne à la vitesse de 20 tours/minute, tandis que les broches 8 sont entraînées sur elles-mêmes à 47 tours/minute ; le temps de polissage, avec une charge abrasive 7 formée de grenaille végétale enduite de crème abrasive, a ainsi pu être réduit de moitié (soit de 5 heures) par rapport à un polissage effectué en tonneau classique pour lequel il n'est possible pas d'animer les broches 8 au delà d'une vitesse de 7 tours/minute. On comprend en particulier que l'efficacité du polissage, qui dépend directement de la vitesse résiduelle telle que définie plus haut, soit effectivement largement améliorée.A polishing barrel was produced in accordance with the invention comprising ten pins 8 each supporting forty spectacle frames for a total capacity of 400 frames. In this embodiment, the drum 4 rotates at the speed of 20 revolutions / minute, while the pins 8 are driven on themselves at 47 revolutions / minute; the polishing time, with an abrasive load 7 formed of vegetable shot coated with abrasive cream, was thus able to be reduced by half (that is to say 5 hours) compared to a polishing carried out in conventional barrel for which it is not possible to '' animate pins 8 beyond a speed of 7 revolutions / minute. It is understood in particular that the efficiency of the polishing, which depends directly on the residual speed as defined above, is effectively greatly improved.

Claims (5)

1 - Dispositif pour la mise en rotation d'un tonneau de polissage plus particulièrement destiné au polissage de montures de lunettes, de boîtiers de montres et autres objets métalliques analogues fixés sur des broches (8) périphériques d'un tambour (4) fermé à ses deux extrémités et dans le fond duquel est placée une charge abrasive (6), ce tonneau comportant - au moins un pignon principal (9) autour duquel s'enroule une chaîne moteur sans fin (10) mue par un organe moteur (12) de sorte à entraîner en rotation l'arbre (3) du tambour (4), - au moins un pignon secondaire (13) monté fou autour de cet arbre (3) et coopérant avec un pignon excentré (15), coaxial d'un arbre secondaire (16) fixé sur l'un des flans (5) latéraux de fermeture du tambour (4), - au moins un pignon de renvoi (18), solidaire du même arbre (16) que le pignon excentré (15) et coopérant avec un ensemble de pignons d'entraînement (20) des axes de rotation (7) des broches (8),    ledit dispositif étant caractérisé en ce que le pignon secondaire (13), ou au moins une roue d'engrenage (25) directement liée à ce pignon secondaire (13), comporte au moins un index (26) saillant latéral susceptible de venir en butée contre au moins un taquet (27) ou analogue, fixe par rapport au tambour (4), de sorte à stopper la rotation dudit pignon secondaire (13) et à provoquer la mise en rotation des pignons d'entraînement (20) des broches (8) en déphasage après la mise en rotation du tambour (4). 1 - Device for rotating a polishing barrel, more particularly intended for the polishing of spectacle frames, watch cases and other similar metallic objects fixed on pins (8) peripheral to a drum (4) closed at its two ends and at the bottom of which is placed an abrasive load (6), this barrel comprising - at least one main pinion (9) around which an endless motor chain (10) is wound, driven by a motor member (12) so as to rotate the shaft (3) of the drum (4), - At least one secondary pinion (13) mounted idly around this shaft (3) and cooperating with an eccentric pinion (15), coaxial with a secondary shaft (16) fixed on one of the lateral closing blanks (5) drum (4), - at least one return pinion (18), integral with the same shaft (16) as the eccentric pinion (15) and cooperating with a set of drive pinions (20) of the axes of rotation (7) of the pins (8) , said device being characterized in that the secondary pinion (13), or at least one gear wheel (25) directly linked to this secondary pinion (13), comprises at least one index (26) projecting laterally capable of coming into abutment against at least one cleat (27) or the like, fixed relative to the drum (4), so as to stop the rotation of said secondary pinion (13) and to cause the rotation of the drive pinions (20) of the pins ( 8) out of phase after the rotation of the drum (4). 2 - Dispositif selon la revendication précédente, caractérisé en ce que le pignon secondaire (13) monté fou sur l'arbre (3) d'entraînement du tambour comporte un unique index saillant latéral susceptible de venir en butée alternativement, selon le sens de rotation dudit pignon secondaire (13), contre au moins un montant du bâti (1) sur lequel est monté ledit tambour (4). 2 - Device according to the preceding claim, characterized in that the secondary pinion (13) mounted idly on the shaft (3) for driving the drum comprises a single lateral projecting index capable of abutting alternately, according to the direction of rotation of said secondary pinion (13), against at least one upright of the frame (1) on which said drum (4) is mounted. 3 - Dispositif selon la revendication 1, caractérisé en ce qu'une roue d'engrenage (23), solidaire du pignon secondaire (13) et montée folle avec elle sur l'arbre d'entraînement (3) du tambour (4), coopère avec une seconde roue d'engrenage (25) d'axe fixe par rapport au bâti (1) sur lequel est monté ledit tambour (4), cette seconde roue d'engrenage (25) comportant au moins un index (26) saillant latéral sur l'une de ses faces, susceptible de venir en butée contre au moins un taquet (27) agencé sur ledit bâti (1). 3 - Device according to claim 1, characterized in that a gear wheel (23), integral with the secondary pinion (13) and idly mounted with it on the drive shaft (3) of the drum (4), cooperates with a second gear wheel ( 25) with a fixed axis relative to the frame (1) on which said drum (4) is mounted, this second gear wheel (25) comprising at least one index (26) projecting laterally on one of its faces, capable of abutting against at least one cleat (27) arranged on said frame (1). 4 - Dispositif selon la revendication précédente, caractérisé en ce que le seconde roue d'engrenage (25) comporte un deuxième index (28) saillant latéral sur son autre face, susceptible de venir en butée contre un second taquet (29), agencé sur le bâti (1) du tonneau en décalage angulaire par rapport au premier taquet (27). 4 - Device according to the preceding claim, characterized in that the second gear wheel (25) has a second index (28) projecting laterally on its other face, capable of abutting against a second cleat (29), arranged on the frame (1) of the barrel in angular offset relative to the first cleat (27). 5 - Dispositif selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que la seconde roue d'engrenage (27) portant le ou les index (26, 28) est montée folle autour de l'arbre de l'organe moteur (12) entraînant le pignon principal (9) commandant la mise en rotation de l'arbre (3) du tambour (4). 5 - Device according to any one of claims 3 or 4, characterized in that the second gear wheel (27) carrying the index (s) (26, 28) is mounted loose around the shaft of the drive member (12) driving the main pinion (9) controlling the rotation of the shaft (3) of the drum (4).
EP92402288A 1991-08-13 1992-08-13 Device for rotating the spindles of a polishing barrel Expired - Lifetime EP0528728B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9110289A FR2680333B1 (en) 1991-08-13 1991-08-13 METHOD AND DEVICE FOR ROTATING THE SPINDLES OF A POLISHING TANK.
FR9110289 1991-08-13

Publications (2)

Publication Number Publication Date
EP0528728A1 true EP0528728A1 (en) 1993-02-24
EP0528728B1 EP0528728B1 (en) 1996-07-10

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Application Number Title Priority Date Filing Date
EP92402288A Expired - Lifetime EP0528728B1 (en) 1991-08-13 1992-08-13 Device for rotating the spindles of a polishing barrel

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EP (1) EP0528728B1 (en)
DE (1) DE69212078D1 (en)
FR (1) FR2680333B1 (en)
MA (1) MA22624A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108115540A (en) * 2017-12-25 2018-06-05 河北金音乐器集团有限公司 Polishing machine and polissoir
TWI647060B (en) * 2018-04-30 2019-01-11 郭錫池 Rotary multi-axis grinding equipment
CN111745530A (en) * 2020-06-06 2020-10-09 傅飞 Polishing device applied to production and processing of automobile exhaust manifold

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111958470B (en) * 2020-08-18 2022-04-15 苏州正永信息科技有限公司 Through type rolling and polishing machine and working method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078623A (en) * 1960-05-13 1963-02-26 William T Stanley Finishing apparatus and method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2848311B1 (en) * 2002-12-04 2005-08-26 France Telecom METHOD AND DEVICE FOR DOWNLOADING DIGITAL DATA TO A REMOTE MEMORY

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078623A (en) * 1960-05-13 1963-02-26 William T Stanley Finishing apparatus and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108115540A (en) * 2017-12-25 2018-06-05 河北金音乐器集团有限公司 Polishing machine and polissoir
TWI647060B (en) * 2018-04-30 2019-01-11 郭錫池 Rotary multi-axis grinding equipment
CN111745530A (en) * 2020-06-06 2020-10-09 傅飞 Polishing device applied to production and processing of automobile exhaust manifold

Also Published As

Publication number Publication date
EP0528728B1 (en) 1996-07-10
FR2680333A1 (en) 1993-02-19
MA22624A1 (en) 1993-04-01
DE69212078D1 (en) 1996-08-14
FR2680333B1 (en) 1995-07-21

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