EP0495691B1 - Cylindrical grinding machine - Google Patents

Cylindrical grinding machine Download PDF

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Publication number
EP0495691B1
EP0495691B1 EP92400034A EP92400034A EP0495691B1 EP 0495691 B1 EP0495691 B1 EP 0495691B1 EP 92400034 A EP92400034 A EP 92400034A EP 92400034 A EP92400034 A EP 92400034A EP 0495691 B1 EP0495691 B1 EP 0495691B1
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EP
European Patent Office
Prior art keywords
abrasive
machining
workpieces
axial translation
parts
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EP92400034A
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German (de)
French (fr)
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EP0495691A1 (en
Inventor
Eric Pineau
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MECALOIR TECHNOLOGIES
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MECALOIR TECHNOLOGIES
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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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/02—Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces
    • B24B21/025—Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces for travelling elongated stock, e.g. wire
    • 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/004—Machines or devices using grinding or polishing belts; Accessories therefor using abrasive rolled strips
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools

Definitions

  • the present invention relates to a machine for abrasive machining of cylindrical parts, comprising means for supporting and driving the parts in rotation about their axes and in axial translation, and machining means comprising several work stations. abrasive machining with grains of increasing fineness succeeding one another in the direction of axial translation of the parts and acting successively on the parts during the axial translation of the latter.
  • a known machine of this type (see for example EP-A-0 347 847) used for the superfinishing machining of cylindrical parts such as damper rods, cylindrical rollers, etc. includes as a device for supporting and driving the parts in rotation and in axial translation two rollers cooperating with the parts to be machined in the manner of grinding wheels without "centerless" centers in a row.
  • the machining means consist of a succession of abrasive stones whose application pressures on the workpiece are continuously adjustable and different depending on the quality of the stones used.
  • Each of these stones is supported by a pneumatic or hydraulic cylinder, and the cylinders (generally six, eight or ten in number) located one after the other in the direction of the axial translation that the parts effect under the effect support and drive rollers are mounted on a common plate animated by an oscillatory movement in axial translation by means of oscillation control and carry stones with increasingly fine grains, which makes it possible to bring a piece in one pass to the desired state of super-finishing.
  • This machining technique has proven itself, but requires an adaptation of the quality of the stones to the workpiece, both in terms of the hardness and the material of the workpiece. It is therefore necessary, for each type of workpiece, to choose a set of stones for machining grains of different fineness, stones which are suitable for the operation to be carried out.
  • the method of manufacturing these abrasive stones does not always make it possible to obtain perfect homogeneity, in particular for so-called blown stones, a lack of homogeneity which can cause "shoeing", that is to say clogging. rocks, causing defective machining.
  • the number of successive stones necessary to bring a piece from a determined starting state to a determined superfinishing state is relatively high.
  • the present invention aims to achieve an abrasive machining machine which, while being simple in structure and reliable in operation, eliminates the risks and imponderables of known machines for machining with abrasive stones, thus ensuring more machining regular at a reduced cost.
  • the machine for abrasive machining of cylindrical parts comprises two rollers cooperating with the parts to be machined by effect without centers to support the parts and drive them in rotation about their axes and in axial translation.
  • Several machining stations follow one another in the direction of axial translation of the parts, with abrasive machining means having grains of increasing fineness from one station to another in the direction of axial translation of the parts, and means support comprising at each station a cylinder for applying the abrasive with a predetermined pressure on the workpieces.
  • the cylinders of all the stations are mounted on a common plate animated by an oscillatory movement in axial translation by means of oscillation control.
  • the abrasive machining means consist of strips of abrasive cloth each of which is, during machining, continuously unwound from a fixed reel for unwinding a strip of new abrasive cloth and rewound on a reel fixed rewinding of worn abrasive cloth strip, after passing over a support roller carried by the jack.
  • the reels for rewinding the worn abrasive cloth strips are mounted on mandrels which have a common, fixed drive system and whose axes are parallel and offset in a vertical plane.
  • the replacement of the abrasive stones of the known machining machines by abrasive cloth strips with continuous advance movement makes it possible, for an equal or even better machining quality, to considerably reduce the number of machining stations necessary to bring in parts from the same starting state to an equal or even better superfinishing state.
  • the machine according to the invention provides this final state with markedly increased reliability, since the strips of abrasive cloth with continuous advance used on the machine according to the invention eliminate the drawbacks associated with the abrasive stones used on the known machines.
  • the rewind reel drive system may preferably include a gearmotor driving a shaft from which the mandrels of all the used abrasive web belt reel reels are driven via belt drives.
  • each abrasive machining station to include two mandrels with an inflatable elastic membrane for pneumatic clamping and unclamping of the new abrasive cloth spool and the worn abrasive cloth spool on the two mandrels.
  • the assembly 2 comprises, in a manner known per se, two cylindrical rollers 3 arranged side by side and driven in rotation so that the workpieces brought one behind the other on the two rollers, at one end of the latter, are both rotated about their axis and driven in axial translation by the two rollers 3, by a centerless effect called “centerless” as it is well known for example for grinders without centers in a row.
  • the spacing of the two rollers 3 is adjustable in order to adapt the support assembly 2 to workpieces of different diameters.
  • the frame 1 also carries a console 4 on which are mounted several abrasive machining units 5 arranged one behind the other in the direction of axial translation of the parts to be machined on the support assembly 2 (arrow A in the figure 2).
  • a plate 6 secured to the console 4 carries, for each machining unit 5, a coil 7 for reserving new abrasive cloth and a winding coil 8 for used abrasive cloth.
  • the winding coils 8 are driven by a geared motor 9 installed on the column 4 by means of belt transmission 10.
  • the column 4 also carries a plate 11 on which is mounted movable in horizontal translation, by slides 12, a plate 13 carrying several cylinders 14.
  • Each cylinder 14 carries, at the lower end of its piston rod, a roller d 'support 15 rotatably mounted in a yoke 16 (see Figures 3 and 4).
  • a strip of abrasive cloth 17 goes from each reserve reel 7 to the corresponding winding reel 8 passing over a support roller 15.
  • the plate 13 is coupled by a connecting rod 18 with an eccentric 19 driven by a motor 20.
  • each winding reel 8 driven by a belt transmission 10 and each reserve reel 7 is mounted on a mandrel 22 carrying an elastic membrane 23 inflatable by means of compressed air arriving by a rotary joint 24 at the mandrel 22 rotatably mounted by bearings 25.
  • the jack 14 of the first machining unit 5 is controlled so that the abrasive cloth of this first unit is applied by the pressure roller 15 of this jack 14 against the workpiece.
  • the workpiece is rotated about its axis and in axial translation, which causes it to pass successively in contact with the abrasive cloths of other machining units 5. Since the strips of abrasive cloth, of increasing fineness, successive machining units 5 are continuously driven during machining, successive parts are all subjected to identical machining conditions, hence obtaining parts of uniform quality.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

Machine for the abrasive machining of cylindrical parts, on which the parts to be machined are driven in rotation and in axial translational motion by supporting and driving means. The machine comprises a plurality of bands (17) of abrasive cloth having grains of increasing fineness in the direction of axial translational motion (A) of the parts to be machined, advancing means for unwinding each band (17) from a reel of new cloth continuously during the machining and for rewinding it onto a reel of worn cloth, bearing means for applying each band (17) with a predetermined pressure onto the parts to be machined, and oscillation means (18, 19, 20) for driving the said bearing means in an oscillating movement in axial translational motion. The invention is used, for example, for the superfinishing of shock-absorber rods, of cylindrical rollers, etc.

Description

La présente invention se rapporte à une machine d'usinage par abrasif de pièces cylindriques, comprenant des moyens de support et d'entraînement des pièces en rotation autour de leurs axes et en translation axiale, et des moyens d'usinage comprenant plusieurs postes d'usinage par abrasif avec des grains de finesse croissante se succédant dans le sens de translation axiale des pièces et agissant successivement sur les pièces pendant la translation axiale de ces dernières.The present invention relates to a machine for abrasive machining of cylindrical parts, comprising means for supporting and driving the parts in rotation about their axes and in axial translation, and machining means comprising several work stations. abrasive machining with grains of increasing fineness succeeding one another in the direction of axial translation of the parts and acting successively on the parts during the axial translation of the latter.

Une machine connue de ce type (voir par exemple EP-A-0 347 847) utilisée pour l'usinage de superfinition de pièces cylindriques telles que des tiges d'amortisseurs, des galets cylindriques, etc. comprend comme dispositif de support et d'entraînement des pièces en rotation et en translation axiale deux rouleaux coopérant avec les pièces à usiner à la manière des meules de rectification sans centres "centerless" en enfilade. Les moyens d'usinage sont constitués par une succession de pierres abrasives dont les pressions d'application sur la pièce à usiner sont réglables en continu et différentes suivant la qualité des pierres utilisées. Chacune de ces pierres est supportée par un vérin pneumatique ou hydraulique, et les vérins (généralement au nombre de six, huit ou dix) situés les uns à la suite des autres dans la direction de la translation axiale que les pièces effectuent sous l'effet des rouleaux de support et d'entraînement sont montés sur une platine commune animée d'un mouvement oscillatoire en translation axiale par des moyens de commande d'oscillation et portent des pierres à grains de plus en plus fins, ce qui permet d'amener une pièce en une passe à l'état de superfinition recherché.A known machine of this type (see for example EP-A-0 347 847) used for the superfinishing machining of cylindrical parts such as damper rods, cylindrical rollers, etc. includes as a device for supporting and driving the parts in rotation and in axial translation two rollers cooperating with the parts to be machined in the manner of grinding wheels without "centerless" centers in a row. The machining means consist of a succession of abrasive stones whose application pressures on the workpiece are continuously adjustable and different depending on the quality of the stones used. Each of these stones is supported by a pneumatic or hydraulic cylinder, and the cylinders (generally six, eight or ten in number) located one after the other in the direction of the axial translation that the parts effect under the effect support and drive rollers are mounted on a common plate animated by an oscillatory movement in axial translation by means of oscillation control and carry stones with increasingly fine grains, which makes it possible to bring a piece in one pass to the desired state of super-finishing.

Cette technique d'usinage a fait ses preuves, mais demande une adaptation de la qualité des pierres à la pièce à usiner, tant du point de la dureté que de la matière de la pièce à usiner. Il est donc nécessaire, pour chaque type de pièces à usiner, de choisir un ensemble de pierres d'usinage de grains de finesses différentes, pierres qui soient adaptées à l'opération à réaliser. En outre, le mode de fabrication de ces pierres abrasives ne permet pas toujours d'obtenir une parfaite homogénéité, en particulier pour les pierres dites souffrées, un défaut d'homogénéité pouvant provoquer un "ferrage" c'est-à-dire un colmatage des pierres, provoquant un usinage défectueux. De plus, le nombre de pierres successives nécessaires pour amener une pièce d'un état de départ déterminé à un état de superfinition déterminé est relativement élevé.This machining technique has proven itself, but requires an adaptation of the quality of the stones to the workpiece, both in terms of the hardness and the material of the workpiece. It is therefore necessary, for each type of workpiece, to choose a set of stones for machining grains of different fineness, stones which are suitable for the operation to be carried out. In addition, the method of manufacturing these abrasive stones does not always make it possible to obtain perfect homogeneity, in particular for so-called blown stones, a lack of homogeneity which can cause "shoeing", that is to say clogging. rocks, causing defective machining. In addition, the number of successive stones necessary to bring a piece from a determined starting state to a determined superfinishing state is relatively high.

La présente invention a pour but de réaliser une machine d'usinage par abrasif qui, tout en étant de structure simple et d'un fonctionnement fiable, élimine les risques et impondérables des machines connues d'usinage par pierres abrasives, assurant ainsi un usinage plus régulier à un coût réduit.The present invention aims to achieve an abrasive machining machine which, while being simple in structure and reliable in operation, eliminates the risks and imponderables of known machines for machining with abrasive stones, thus ensuring more machining regular at a reduced cost.

Telle que revendiquée, la machine d'usinage par abrasif de pièces cylindriques, comprend deux rouleaux coopérant avec les pièces à usiner par effet sans centres pour supporter les pièces et les entraîner en rotation autour de leurs axes et en translation axiale. Plusieurs postes d'usinage se succédent dans le sens de translation axiale des pièces, avec des moyens d'usinage par abrasif ayant des grains de finesse croissante d'un poste à l'autre dans le sens de translation axiale des pièces, et des moyens d'appui comprenant à chaque poste un vérin pour appliquer l'abrasif avec une pression prédéterminée sur les pièces à usiner. Les vérins de tous les postes sont montés sur une platine commune animée d'un mouvement oscillatoire en translation axiale par des moyens de commande d'oscillation. Selon l'invention, les moyens d'usinage par abrasif sont constitués par des bandes de toile abrasive dont chacune est, pendant l'usinage, déroulée en continu d'une bobine fixe de déroulement de bande de toile abrasive neuve et réenroulée sur une bobine fixe de réenroulement de bande de toile abrasive usée, après passage sur un rouleau d'appui porté par le vérin. Les bobines de réenroulement des bandes de toile abrasive usées sont montées sur des mandrins qui comportent un système d'entraînement commun, fixe et dont les axes sont parallèles et décalés dans un plan vertical.As claimed, the machine for abrasive machining of cylindrical parts, comprises two rollers cooperating with the parts to be machined by effect without centers to support the parts and drive them in rotation about their axes and in axial translation. Several machining stations follow one another in the direction of axial translation of the parts, with abrasive machining means having grains of increasing fineness from one station to another in the direction of axial translation of the parts, and means support comprising at each station a cylinder for applying the abrasive with a predetermined pressure on the workpieces. The cylinders of all the stations are mounted on a common plate animated by an oscillatory movement in axial translation by means of oscillation control. According to the invention, the abrasive machining means consist of strips of abrasive cloth each of which is, during machining, continuously unwound from a fixed reel for unwinding a strip of new abrasive cloth and rewound on a reel fixed rewinding of worn abrasive cloth strip, after passing over a support roller carried by the jack. The reels for rewinding the worn abrasive cloth strips are mounted on mandrels which have a common, fixed drive system and whose axes are parallel and offset in a vertical plane.

Le remplacement des pierres abrasives des machines d'usinage connues par des bandes de toile abrasive à mouvement d'avance continu permet, pour une qualité d'usinage égale, voire meilleure, de réduire considérablement le nombre de postes d'usinage nécessaires pour amener des pièces d'un même état de départ à un état de superfinition égal, voire meilleur. De plus, la machine conforme à l'invention procure cet état final avec une fiabilité nettement accrue, du fait que les bandes de toile abrasive à avance continue utilisées sur la machine conforme à l'invention éliminent les inconvénients liés aux pierres abrasives utilisées sur les machines connues.The replacement of the abrasive stones of the known machining machines by abrasive cloth strips with continuous advance movement makes it possible, for an equal or even better machining quality, to considerably reduce the number of machining stations necessary to bring in parts from the same starting state to an equal or even better superfinishing state. In addition, the machine according to the invention provides this final state with markedly increased reliability, since the strips of abrasive cloth with continuous advance used on the machine according to the invention eliminate the drawbacks associated with the abrasive stones used on the known machines.

Seuls les vérins et les rouleaux d'appui portés par ces vérins sont animés d'un mouvement oscillatoire nécessaire, comme cela est bien connu, pour donner aux pièces l'état de surface requis, tandis que les bobines de toile neuve et les bobines de toile usée ainsi que les moyens d'avancement des bandes de toile abrasive sont fixes. Malgré cela les bandes de toile abrasive peuvent suivre sans difficulté, dans leur partie située entre les bobines de toile neuve et les bobines de toile usée, les mouvements oscillatoires d'amplitude réduite des rouleaux d'appui.Only the jacks and the support rollers carried by these jacks are driven by a necessary oscillatory movement, as is well known, to give the parts the required surface condition, while the new fabric spools and the spools worn canvas and the means for advancing the abrasive cloth strips are fixed. Despite this, the abrasive cloth strips can easily follow, in their part located between the new cloth coils and the worn cloth coils, the oscillatory movements of reduced amplitude of the support rollers.

Le système d'entraînement des bobines de réenroulement peut comprendre de préférence un motoréducteur entraînant un arbre à partir duquel les mandrins de toutes les bobines de réenroulement de bande de toile abrasive usée sont entraînés par l'intermédiaire de transmissions à courroie.The rewind reel drive system may preferably include a gearmotor driving a shaft from which the mandrels of all the used abrasive web belt reel reels are driven via belt drives.

Pour simplifier le remplacement des bobines de toile neuve et des bobines de toile usée, il est avantageux que chaque poste d'usinage par abrasif comprenne deux mandrins à membrane élastique gonflable en vue du bridage et débridage pneumatique de la bobine de toile abrasive neuve et de la bobine de toile abrasive usée sur les deux mandrins.To simplify the replacement of new canvas spools and used canvas spools, it is advantageous for each abrasive machining station to include two mandrels with an inflatable elastic membrane for pneumatic clamping and unclamping of the new abrasive cloth spool and the worn abrasive cloth spool on the two mandrels.

En se référant aux dessins schématiques annexés, on va décrire ci-après plus en détail un mode de réalisation illustratif et non limitatif d'une machine conforme à l'invention; sur les dessins :

  • la figure 1 est une vue de côté et la figure 2 une vue de face d'une machine d'usinage conforme à l'invention à trois postes d'usinage;
  • la figure 3 est une vue de face de la platine mobile portant les vérins de commande des rouleaux d'appui ainsi que la commande d'oscillation de cette platine;
  • la figure 4 est une coupe suivant IV-IV de la figure 3;
  • la figure 5 est une vue schématique de la cinématique du système d'avancement continu des bandes de toile abrasive;
  • la figure 6 représente les mandrins à membrane gonflable pour le bridage de la bobine de toile neuve et de la bobine de toile usée d'un poste d'usinage.
Referring to the appended schematic drawings, an illustrative and nonlimiting embodiment of a machine according to the invention will be described below in more detail; on the drawings:
  • Figure 1 is a side view and Figure 2 a front view of a machining machine according to the invention with three machining stations;
  • Figure 3 is a front view of the movable plate carrying the control cylinders of the support rollers and the oscillation control of this plate;
  • Figure 4 is a section along IV-IV of Figure 3;
  • Figure 5 is a schematic view of the kinematics of the continuous advancement system of the abrasive cloth strips;
  • FIG. 6 represents the mandrels with an inflatable membrane for clamping the new spool of canvas and the spool of used canvas of a machining station.

Tel qu'illustrée par les figures 1 et 2, une machine conforme à l'invention pour l'usinage par abrasif de pièces cylindriques, par exemple la superfinition de tiges d'amortisseurs ou de galets cylindriques comprend, sur un bâti 1 fixe, un ensemble 2 de support et d'entraînement en rotation et en translation axiale des pièces à usiner non représentées. L'ensemble 2 comprend, de façon connue en soi, deux rouleaux cylindriques 3 disposés côte à côte et entraînés en rotation de telle manière que les pièces à usiner amenées les unes derrière les autres sur les deux rouleaux, à une extrémité de ces derniers, soient à la fois entraînées en rotation autour de leur axe et entraînées en translation axiale par les deux rouleaux 3, par un effet sans centres dit "centerless" tel qu'il est bien connu par exemple pour les rectifieuses sans centres en enfilade.As illustrated in FIGS. 1 and 2, a machine according to the invention for the abrasive machining of cylindrical parts, for example the superfinishing of damper rods or cylindrical rollers comprises, on a fixed frame 1, a assembly 2 for support and drive in rotation and in axial translation of the workpieces not shown. The assembly 2 comprises, in a manner known per se, two cylindrical rollers 3 arranged side by side and driven in rotation so that the workpieces brought one behind the other on the two rollers, at one end of the latter, are both rotated about their axis and driven in axial translation by the two rollers 3, by a centerless effect called "centerless" as it is well known for example for grinders without centers in a row.

L'écartement des deux rouleaux 3 est réglable en vue de l'adaptation de l'ensemble de support 2 à des pièces à usiner de diamètres différents.The spacing of the two rollers 3 is adjustable in order to adapt the support assembly 2 to workpieces of different diameters.

Le bâti 1 porte par ailleurs une console 4 sur laquelle sont montées plusieurs unités d'usinage par abrasif 5 disposées les unes derrière les autres dans le sens de translation axiale des pièces à usiner sur l'ensemble de support 2 (flèche A sur la figure 2).The frame 1 also carries a console 4 on which are mounted several abrasive machining units 5 arranged one behind the other in the direction of axial translation of the parts to be machined on the support assembly 2 (arrow A in the figure 2).

Une platine 6 solidaire de la console 4 porte, pour chaque unité d'usinage 5, une bobine 7 de réserve de toile abrasive neuve et une bobine de renvidage 8 de toile abrasive usée. Les bobines de renvidage 8 sont entraînées par un motoréducteur 9 installé sur la colonne 4 par l'intermédiaire de transmission à courroie 10.A plate 6 secured to the console 4 carries, for each machining unit 5, a coil 7 for reserving new abrasive cloth and a winding coil 8 for used abrasive cloth. The winding coils 8 are driven by a geared motor 9 installed on the column 4 by means of belt transmission 10.

La colonne 4 porte par ailleurs une platine 11 sur laquelle est montée mobile en translation horizontale, par des glissières 12, une platine 13 portant plusieurs vérins 14. Chaque vérin 14 porte, à l'extrémité inférieure de sa tige de piston, un rouleau d'appui 15 monté en rotation dans une chape 16 (voir figures 3 et 4).The column 4 also carries a plate 11 on which is mounted movable in horizontal translation, by slides 12, a plate 13 carrying several cylinders 14. Each cylinder 14 carries, at the lower end of its piston rod, a roller d 'support 15 rotatably mounted in a yoke 16 (see Figures 3 and 4).

Tel que cela apparaît notamment sur les figures 1 et 2, une bande de toile abrasive 17 va de chaque bobine de réserve 7 à la bobine de renvidage 8 correspondante en passant sur un rouleau d'appui 15.As shown in particular in FIGS. 1 and 2, a strip of abrasive cloth 17 goes from each reserve reel 7 to the corresponding winding reel 8 passing over a support roller 15.

La platine 13 est couplée par une bielle 18 avec un excentrique 19 entrainé par un moteur 20.The plate 13 is coupled by a connecting rod 18 with an eccentric 19 driven by a motor 20.

Sur le schéma de la figure 5, on reconnaît que toutes les transmissions à courroie 10 qui entraînent les bobines 8 de renvidage de toile abrasive en vue de l'avancement continu des toiles 17 retirées des bobines de réserve 7 sont commandées par le motoréducteur 9 par l'intermédiaire d'un arbre 21 commun.In the diagram of FIG. 5, it can be seen that all the belt transmissions 10 which drive the coils 8 for winding the abrasive cloth for the continuous advancement of the fabrics 17 removed from the reserve coils 7 are controlled by the gear motor 9 by through a common tree 21.

Selon la figure, chaque bobine de renvidage 8 entrainée par une transmission à courroie 10 et chaque bobine de réserve 7 est montée sur un mandrin 22 portant une membrane 23 élastique gonflable à l'aide d'air comprimé arrivant par un joint tournant 24 au mandrin 22 monté en rotation par des roulements 25.According to the figure, each winding reel 8 driven by a belt transmission 10 and each reserve reel 7 is mounted on a mandrel 22 carrying an elastic membrane 23 inflatable by means of compressed air arriving by a rotary joint 24 at the mandrel 22 rotatably mounted by bearings 25.

Lorsqu'un pièce amenée par exemple par un transporteur arrive sur les rouleaux 3 à l'extrémité de gauche sur la figure 2, le vérin 14 de la première unité d'usinage 5 est commandé de manière que la toile abrasive de cette première unité soit appliquée par le rouleau de pression 15 de ce vérin 14 contre la pièce à usiner. Par l'effet dit sans centre, la pièce à usiner est entrainée en rotation autour de son axe et en translation axiale, ce qui la fait passer successivement au contact des toiles abrasives des autres unités d'usinage 5. Etant donné que les bandes de toile abrasive, de finesse croissante, des unités d'usinage 5 successives sont entraînées en continu pendant l'usinage, les pièces successives sont toutes soumises à des conditions d'usinage identiques, d'où l'obtention de pièces de qualité uniforme.When a part brought for example by a conveyor arrives on the rollers 3 at the left end in FIG. 2, the jack 14 of the first machining unit 5 is controlled so that the abrasive cloth of this first unit is applied by the pressure roller 15 of this jack 14 against the workpiece. By the so-called centerless effect, the workpiece is rotated about its axis and in axial translation, which causes it to pass successively in contact with the abrasive cloths of other machining units 5. Since the strips of abrasive cloth, of increasing fineness, successive machining units 5 are continuously driven during machining, successive parts are all subjected to identical machining conditions, hence obtaining parts of uniform quality.

Bien entendu, le mode de réalisation décrit ci-dessus et illustré par les dessins annexés n'a été donné qu'à titre d'exemple indicatif et non limitatif et de nombreuses modifications et variantes sont possibles dans le cadre de l'invention. Ainsi, le nombre des unités d'usinage successives sur une même machine peut être différent de trois, ce nombre pouvant être augmenté en fonction de la qualité exigée des pièces usinées.Of course, the embodiment described above and illustrated by the accompanying drawings has been given by way of non-limiting example only and numerous modifications and variants are possible within the scope of the invention. Thus, the number of successive machining units on the same machine can be different from three, this number can be increased depending on the quality required of the machined parts.

Par ailleurs, pour le changement des bobines de réserve et des bobines de renvidage, il est possible d'utiliser d'autres moyens que des mandrins à membrane gonflable.In addition, for changing the reserve coils and winding reels, it is possible to use means other than inflatable membrane mandrels.

Claims (3)

  1. Machine for machining cylindrical workpieces by abrasive, comprising two rollers (3) interacting with the workpieces to be machined by centreless effect so as to support the workpieces and to drive them in rotation about their axes and in axial translation, several machining stations (5) following one another in the direction of axial translation of the workpieces, with means for machining by abrasive having grains of fineness increasing from one station to another in the direction of axial translation of the workpieces, and bearing means comprising at each station a jack (14) so as to apply the abrasive with a preset pressure on the workpieces to be machined, the jacks of all the stations being mounted on a common support plate (13) driven with an oscillatory movement in axial translation by oscillation control means (18, 19, 20), characterised in that the means for machining by abrasive are constituted by abrasive fabric tapes (17) each of which is, during the machining, unwound continuously from a fixed reel (7) for unwinding new abrasive fabric tape and rewound onto a fixed reel (8) for the winding-on of worn abrasive fabric tape, after passage over a bearing roller (15) borne by the jack (14), and in that the reels (18) for rewinding the worn abrasive fabric tapes are mounted on spindles (22) which comprise a fixed, common driving system (9, 10,21) and the axes of which are parallel and offset in a vertical plane.
  2. Machine according to Claim 1, characterised in that the system for driving the spindles (22) of the reels (8) for rewinding the worn abrasive fabric tapes comprise a shaft (21) controlled by a motor (9) and driving the spindles (22) of the reels (8) through the intermediary of belt transmissions (10).
  3. Machine according to any of the preceding claims, characterised in that each reel (7,8) for unwinding and for rewinding abrasive fabric tape is maintained on a spindle (22) having a resilient diaphragm (23) inflatable with a view to the pneumatic clamping and unclamping of the reels (7,8).
EP92400034A 1991-01-11 1992-01-08 Cylindrical grinding machine Expired - Lifetime EP0495691B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9100296 1991-01-11
FR9100296A FR2671504B1 (en) 1991-01-11 1991-01-11 MACHINE FOR ABRASIVE MACHINING OF CYLINDRICAL PARTS.

Publications (2)

Publication Number Publication Date
EP0495691A1 EP0495691A1 (en) 1992-07-22
EP0495691B1 true EP0495691B1 (en) 1995-11-02

Family

ID=9408613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92400034A Expired - Lifetime EP0495691B1 (en) 1991-01-11 1992-01-08 Cylindrical grinding machine

Country Status (7)

Country Link
US (1) US5224300A (en)
EP (1) EP0495691B1 (en)
JP (1) JPH06278004A (en)
AT (1) ATE129657T1 (en)
DE (1) DE69205693T2 (en)
ES (1) ES2078672T3 (en)
FR (1) FR2671504B1 (en)

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ATE159445T1 (en) * 1991-11-30 1997-11-15 Sony Corp GRINDING MACHINE FOR GRINDING EMBOSSING DIES FOR PRODUCING PRESSED DISCS
CA2163761A1 (en) * 1993-05-26 1994-12-08 Michael V. Mucci Method of providing a smooth surface on a substrate
WO1998005473A1 (en) * 1996-08-01 1998-02-12 Radtec, Inc. Microfinishing machine
FR2767275B1 (en) 1997-08-12 1999-10-15 Soc D Procedes Et Machines Spe MACHINE FOR MACHINING, PARTICULARLY SUPERFINITION, OF CYLINDRICAL SURFACES OF PARTS OF REVOLUTION, BY ABRASIVE BELT WITH TANGENTIAL SCROLLING
DE19756610A1 (en) * 1997-12-18 1999-07-01 Junker Erwin Maschf Gmbh Method and device for grinding workpieces with time-parallel fine machining
US6299512B1 (en) * 1999-05-13 2001-10-09 Alessandro Costa Belt sander with orbitally translated abrasive belt
US6089958A (en) * 1999-05-13 2000-07-18 Costa; Alessandro Belt sander with orbitally translated abrasive belt
US6135861A (en) * 1999-11-01 2000-10-24 Dana Corporation Shaft polishing method and a shaft produced thereby
US6629875B2 (en) * 2000-01-28 2003-10-07 Accretech Usa, Inc. Machine for grinding-polishing of a water edge
US6468140B1 (en) * 2000-08-14 2002-10-22 Chun-Hsiang Wang Swinging device for a sanding machine
DE102007061404A1 (en) * 2007-12-12 2009-06-18 Nagel Maschinen- Und Werkzeugfabrik Gmbh Workholding device for device for super finishing rotationally symmetric work piece in centerless continuous process, has pair of bearer drums for receiving workpiece in receiving slot
KR100840413B1 (en) * 2008-03-25 2008-06-23 최영국 Polishing system
CN105619213B (en) * 2016-01-07 2017-09-12 温州大学激光与光电智能制造研究院 A kind of automatic polishing system for cylindrical work
KR101695679B1 (en) 2016-03-25 2017-01-12 이문섭 cylinder type grinding apparatus using proximity sensor and electric clutch and timer and the method thereof
JP2019091746A (en) * 2017-11-13 2019-06-13 株式会社荏原製作所 Device and method for substrate surface treatment
CN113601286A (en) * 2021-08-07 2021-11-05 湖南大学 Vibration-assisted centerless grinding device
CN115816244B (en) * 2022-12-31 2023-10-10 徐州汉裕铝业股份有限公司 Generator guard plate grinding device
CN116214339B (en) * 2023-02-28 2023-10-20 肇庆高峰机械科技有限公司 High-precision numerical control verticality grinding machine
CN118061043B (en) * 2024-04-11 2024-08-20 始博(江苏)智能制造有限公司 Stainless steel plate polishing equipment

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Also Published As

Publication number Publication date
JPH06278004A (en) 1994-10-04
US5224300A (en) 1993-07-06
ES2078672T3 (en) 1995-12-16
FR2671504B1 (en) 1993-04-30
ATE129657T1 (en) 1995-11-15
EP0495691A1 (en) 1992-07-22
DE69205693D1 (en) 1995-12-07
DE69205693T2 (en) 1996-05-30
FR2671504A1 (en) 1992-07-17

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