EP0896856A1 - Machine tool especially for superfinishing of cylindrical surfaces of revolution by means of a tangential running grinding belt - Google Patents

Machine tool especially for superfinishing of cylindrical surfaces of revolution by means of a tangential running grinding belt Download PDF

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Publication number
EP0896856A1
EP0896856A1 EP98402018A EP98402018A EP0896856A1 EP 0896856 A1 EP0896856 A1 EP 0896856A1 EP 98402018 A EP98402018 A EP 98402018A EP 98402018 A EP98402018 A EP 98402018A EP 0896856 A1 EP0896856 A1 EP 0896856A1
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EP
European Patent Office
Prior art keywords
rollers
machining
assembly
machine according
support
Prior art date
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Granted
Application number
EP98402018A
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German (de)
French (fr)
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EP0896856B1 (en
Inventor
Richard Bonachera
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Procedes et Machines Speciales Ste
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Procedes et Machines Speciales Ste
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Publication of EP0896856A1 publication Critical patent/EP0896856A1/en
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Classifications

    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces
    • 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
    • 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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/04—Honing machines or devices; Accessories therefor designed for working external surfaces of revolution
    • 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
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
    • B24B47/206—Drives or gearings; Equipment therefor relating to feed movement for centreless grinding machines; for machines comprising work supports, e.g. steady rests
    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/307—Means for supporting work
    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/35—Accessories
    • B24B5/355—Feeding means

Definitions

  • the present invention relates to a machining machine, in particular of superfinishing, of cylindrical surfaces of pieces of revolution by tangential movement, on the cylindrical surface of at least one part, at at least one machining station, of an abrasive belt which, from an unwinding reel, goes on a support roller before being rewound on a rewinding reel, the part being supported by a pair of spaced parallel rotating support rollers.
  • the known machining machines by abrasive belt with scrolling tangential comprising one or more machining stations stationary and stationary support rollers use, to produce a movement of the workpiece in relation to the support rollers stationary, i.e. a pair of support rollers inclined one by compared to the other (see for example EP-A-495,691), which however gives a non-positive forward movement, i.e. cleats mounted on a chain moving forward, the cleats passing between pairs of parallel rollers.
  • the parts are certainly animated by a positive movement of advancement, but by the fact that the rollers are stationary, the advancement of the parts on the rollers causes a slip, therefore a friction of the parts on the rollers. This can cause the surface finish of the parts to deteriorate.
  • the present invention relates to a machining machine of the defined type above, which ensures a positive feed movement between the parts to machine and the machining station (s), without sliding and therefore without friction of the parts on the support rollers.
  • the machining machine comprises a support assembly on which the parallel support rollers are mounted mobile in rotation around their axes.
  • This machine includes, in addition, a machining assembly comprising one or more stations machining.
  • One of said assemblies is mounted movable in translation parallel to the axes of the support rollers relative to each other together.
  • the machine further comprises means for driving the support rollers rotating about their axes and means for move one of said sets in translation parallel to the axes of the support rollers relative to each other.
  • the mobile assembly can be either the machining assembly carrying the machining unit (s), i.e. the assembly of support carrying the support rollers, the other assembly being stationary.
  • the first variant may in particular have advantages in the case of long workpieces, while the second variant is preferable more particularly for machining parts relatively short.
  • the machine on which the support assembly is movable can advantageously comprise at least one pair of support rollers mounted on a table with a translational movement.
  • the support assembly can advantageously carry, in addition to the support rollers, at least one work positioning means designed to act on the work carried by the pair of rollers to position the part axially by support rollers while allowing its rotation.
  • the or each positioning means is constituted by a rotary cleat participating in the rotational movement that the part undergoing during machining. This removes or at the very least reduces also the sliding therefore the friction of the part on the cleat.
  • the or each positioning means is arranged centrally with respect to the workpiece, i.e. in position median with respect to the two workpiece support rollers.
  • the support rollers are preferably rotated by a motor mounted on the table of the mobile support assembly.
  • the table which can be mounted movable in translation on slides can be advantageously moved in translation by a screw-nut type drive system.
  • the machine can include several stations successive machining in the direction of translation, allowing submit the same part in a row to several operations successive, for example several superfinishing operations with grains of increasing finesse.
  • the machine tool by abrasive belt preferably for superfinishing surfaces cylindrical parts of revolution, includes an elongated frame 1 bearing two parallel longitudinal slides 2, arranged in the same plane horizontal, and a longitudinal screw 3 located between the two slides 2.
  • the screw 3 can be rotated by a geared motor 4.
  • a machining assembly is mounted in a fixed position on the frame 1, above the runners 2, roughly in the middle of the length of these past.
  • Machining assembly 5 includes three units or stations machining 6 succeeding one another in the direction of the length of the slides 2.
  • each machining station 6 includes essentially a coil 7 for unwinding an abrasive belt 8, a reel 9 for rewinding the abrasive belt 8, a support roller 10 on which the abrasive belt 8 passes between the two coils 7 and 9, and a actuator 11 which can be for example a jack for moving down and upwards the support roller 10.
  • Such machining units by tangential movement of a strip abrasive are well known, especially in the field of superfinish. As an example, it is possible to refer to the request EP-A-495691.
  • An assembly 12 is mounted movable in translation on the slides 2.
  • the assembly 12 comprises a rectangular table 13 guided on the runners 2.
  • the table 13 carries on its underside a nut 14 in engagement with screw 3.
  • the table 13 On its upper face, the table 13 carries, by means of bearings 15, two pairs of parallel horizontal rollers 16, at least one roller of each pair being rotated by a motor 17 mounted below table 13.
  • the rollers 16 of each pair are used to support a part 18, the rotation of the rollers 16 causing the rotation of the part 18 resting on these rollers.
  • these means consist of bearings 19 with bearings provided at the axial ends of the rollers 16 and bearing against the rear end of the part 18 during advancement of the latter from left to right in Figures 1 and 2 below the machining assembly 5. Since the cleat advances in synchronism with rollers 16 and door against the rear end face of the part 18, the cylindrical surface of part 18, the superfinish of which is provided by the machining assembly 5, does not undergo any friction with respect to to the rollers 16, which excludes any risk of damage to this area.
  • the cleat 19 is a rolling cleat, a damage to the end face of the part, by friction with the cleat, is also excluded.
  • the cleat 19 is arranged in the middle position by compared to the rollers 16 of the pair of rollers located in front of it.
  • two pairs of rollers 16 are mounted one behind the other on the table 13, to support two pieces to machining which pass successively under the machining assembly 5.
  • a cleat 19 is arranged at the rear end of each pair of rollers 16 and an additional stopper 19 is arranged at the front end of the pair of rollers 16 anterior.
  • the mobile assembly 12 is shown in lines full in the starting position (on the left in the figure) and in phantom in the position after machining (on the right in the figure). It should be noted at this subject that the movable assembly 12 back and forth makes it possible to discharge the parts, either in the loading position shown in solid lines, after return of the mobile assembly 12 in this position, either in the opposite position shown in phantom. In the latter case, the unloading can be done on the same side as the loading or on the opposite side.
  • the machine comprises on a frame 101, a machining assembly 105 movable in translation, and a stationary assembly 112 carrying pairs of rollers 116.
  • the assembly 105 comprising three machining stations 106 successive abrasive belt is movable on slides 102, under the action a screw 103 driven by a geared motor 104.
  • the assembly 112 stationary includes a motor 117 for the rotational drive of support rollers 116.
  • means 119 for positioning which can be of the same type as the cleats 19 of the mode for carrying out FIGS. 1 to 3, can be provided on the assembly 112 to ensure the positioning of the parts relative to the rollers 116, during the machining of the parts by longitudinal translation of the assembly mobile 105 according to the arrow.
  • the machining assembly 5, 105 can include either a single machining station or a more or less number important successive posts in a row.
  • the set 12 or 112 can include a single pair of support rollers 16,116, or also more than two successive pairs of support rollers, depending on the length of workpieces.
  • the means shown for guiding the mobile assembly 5, 112 (slides 2, 102) and for back-and-forth drive of this assembly (screws 3, 103, gearmotor 4, 104, nut 14) can also be replaced by equivalent means filling the same function.
  • the cleats 19 in the middle position between the rollers 16 could be replaced, for example, by means of positioning mounted on the support rollers and rotating with these last.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

Rotating support rollers (16) for the passage of parts under the machining post (6) are translated parallel to their axes. The rollers are mounted on a translating table (13) which also carries the positioner (19) for the parts.

Description

La présente invention se rapporte à une machine d'usinage, en particulier de superfinition, de surfaces cylindriques de pièces de révolution par défilement tangentiel, sur la surface cylindrique d'au moins une pièce, à au moins un poste d'usinage, d'une bande abrasive qui, provenant d'une bobine de déroulement, passe sur un rouleau d'appui avant d'être réenroulée sur une bobine de réenroulement, la pièce étant supportée par une paire de rouleaux de support rotatifs parallèles espacés.The present invention relates to a machining machine, in particular of superfinishing, of cylindrical surfaces of pieces of revolution by tangential movement, on the cylindrical surface of at least one part, at at least one machining station, of an abrasive belt which, from an unwinding reel, goes on a support roller before being rewound on a rewinding reel, the part being supported by a pair of spaced parallel rotating support rollers.

Les machines d'usinage connues par bande abrasive à défilement tangentiel dites "Centerless" comprenant un ou plusieurs postes d'usinage fixes et des rouleaux de support stationnaires utilisent, pour produire un mouvement d'avancement de la pièce par rapport aux rouleaux de support stationnaires, soit une paire de rouleaux de support inclinés l'un par rapport à l'autre (voir par exemple EP-A-495 691), ce qui donne cependant un mouvement d'avancement non positif, soit des taquets montés sur une chaíne animée d'un mouvement d'avancement, les taquets passant entre les paires de rouleaux parallèles. Dans ce dernier cas, les pièces sont certes animées d'un mouvement d'avancement positif, mais du fait que les rouleaux sont stationnaires, l'avancement des pièces sur les rouleaux entraíne un glissement, donc un frottement des pièces sur les rouleaux. Cela peut provoquer une altération de l'état de surface des pièces.The known machining machines by abrasive belt with scrolling tangential called "Centerless" comprising one or more machining stations stationary and stationary support rollers use, to produce a movement of the workpiece in relation to the support rollers stationary, i.e. a pair of support rollers inclined one by compared to the other (see for example EP-A-495,691), which however gives a non-positive forward movement, i.e. cleats mounted on a chain moving forward, the cleats passing between pairs of parallel rollers. In the latter case, the parts are certainly animated by a positive movement of advancement, but by the fact that the rollers are stationary, the advancement of the parts on the rollers causes a slip, therefore a friction of the parts on the rollers. This can cause the surface finish of the parts to deteriorate.

La présente invention vise une machine d'usinage du type défini ci-dessus, qui assure un mouvement d'avance positif entre les pièces à usiner et le ou les postes d'usinage, sans glissement et donc sans frottement des pièces sur les rouleaux de support. The present invention relates to a machining machine of the defined type above, which ensures a positive feed movement between the parts to machine and the machining station (s), without sliding and therefore without friction of the parts on the support rollers.

La machine d'usinage suivant la présente invention comprend un ensemble de support sur lequel les rouleaux de support parallèles sont montés mobiles en rotation autour de leurs axes. Cette machine comprend, en outre, un ensemble d'usinage comprenant un ou plusieurs postes d'usinage. L'un desdits ensembles est monté mobile en translation parallèlement aux axes des rouleaux de support par rapport à l'autre ensemble. La machine comprend, de plus, des moyens pour entraíner les rouleaux de support en rotation autour de leurs axes et des moyens pour déplacer l'un desdits ensembles en translation parallèlement aux axes des rouleaux de support par rapport à l'autre ensemble.The machining machine according to the present invention comprises a support assembly on which the parallel support rollers are mounted mobile in rotation around their axes. This machine includes, in addition, a machining assembly comprising one or more stations machining. One of said assemblies is mounted movable in translation parallel to the axes of the support rollers relative to each other together. The machine further comprises means for driving the support rollers rotating about their axes and means for move one of said sets in translation parallel to the axes of the support rollers relative to each other.

Dans le cadre de l'invention, l'ensemble mobile peut être, soit l'ensemble d'usinage portant la ou les unités d'usinage, soit l'ensemble de support portant les rouleaux de support, l'autre ensemble étant stationnaire.In the context of the invention, the mobile assembly can be either the machining assembly carrying the machining unit (s), i.e. the assembly of support carrying the support rollers, the other assembly being stationary.

La première variante peut présenter en particulier des avantages dans le cas de pièces à usiner de grande longueur, alors que la seconde variante est préférable plus particulièrement pour l'usinage de pièces relativement courtes.The first variant may in particular have advantages in the case of long workpieces, while the second variant is preferable more particularly for machining parts relatively short.

La machine sur laquelle l'ensemble de support est mobile peut avantageusement comprendre au moins une paire de rouleaux de support montés sur une table animée d'un mouvement de translation.The machine on which the support assembly is movable can advantageously comprise at least one pair of support rollers mounted on a table with a translational movement.

Pour exclure tout glissement et donc tout frottement entre les pièces et les rouleaux de support, l'ensemble de support peut avantageusement porter, outre les rouleaux de support, au moins un moyen de positionnement de la pièce conçu de manière à agir sur la pièce portée par la paire de rouleaux pour positionner la pièce axialement par rapport aux rouleaux de support tout en autorisant sa rotation.To exclude any slippage and therefore any friction between the support parts and rollers, the support assembly can advantageously carry, in addition to the support rollers, at least one work positioning means designed to act on the work carried by the pair of rollers to position the part axially by support rollers while allowing its rotation.

De préférence, le ou chaque moyen de positionnement est constitué par un taquet rotatif participant au mouvement de rotation que la pièce subit pendant l'usinage. Cela supprime ou pour le moins réduit également le glissement donc le frottement de la pièce sur le taquet.Preferably, the or each positioning means is constituted by a rotary cleat participating in the rotational movement that the part undergoing during machining. This removes or at the very least reduces also the sliding therefore the friction of the part on the cleat.

De préférence, le ou chaque moyen de positionnement est disposé en position centrale par rapport à la pièce, c'est-à-dire en position médiane par rapport aux deux rouleaux de support de la pièce.Preferably, the or each positioning means is arranged centrally with respect to the workpiece, i.e. in position median with respect to the two workpiece support rollers.

Les rouleaux de support sont de préférence entraínés en rotation par un moteur monté sur la table de l'ensemble de support mobile.The support rollers are preferably rotated by a motor mounted on the table of the mobile support assembly.

La table qui peut être montée mobile en translation sur des glissières peut être avantageusement déplacée en translation par un système d'entraínement du type vis-écrou.The table which can be mounted movable in translation on slides can be advantageously moved in translation by a screw-nut type drive system.

De préférence, la machine peut comprendre plusieurs postes d'usinage successifs suivant la direction de translation, permettant ainsi de soumettre la même pièce en enfilade à plusieurs opérations successives, par exemple plusieurs opérations de superfinition avec des grains de finesse croissante.Preferably, the machine can include several stations successive machining in the direction of translation, allowing submit the same part in a row to several operations successive, for example several superfinishing operations with grains of increasing finesse.

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

  • la figure 1 est une vue de dessus d'une machine conforme à l'invention;
  • la figure 2 est une vue en élévation latérale, partiellement en coupe, de la machine suivant la figure 1;
  • la figure 3 est une vue en bout de la machine suivant les figures 1 et 2;
  • la ligne 4 est une vue de dessus d'une variante de la machine suivant la figure 1.
    • Referring to the appended schematic drawings, two more illustrative and nonlimiting embodiments of a machine according to the invention will be described below in more detail; on the drawings:
  • Figure 1 is a top view of a machine according to the invention;
  • Figure 2 is a side elevational view, partially in section, of the machine according to Figure 1;
  • Figure 3 is an end view of the machine according to Figures 1 and 2;
  • line 4 is a top view of a variant of the machine according to FIG. 1.

    • Telle qu'illustrée par les figures 1 à 3, la machine d'usinage par bande abrasive, de préférence pour la superfinition de surfaces cylindriques de pièces de révolution, comprend un bâti 1 allongé portant deux glissières 2 longitudinales parallèles, disposées dans un même plan horizontal, et une vis 3 longitudinale située entre les deux glissières 2. La vis 3 peut être entraínée en rotation par un motoréducteur 4.As illustrated in Figures 1 to 3, the machine tool by abrasive belt, preferably for superfinishing surfaces cylindrical parts of revolution, includes an elongated frame 1 bearing two parallel longitudinal slides 2, arranged in the same plane horizontal, and a longitudinal screw 3 located between the two slides 2. The screw 3 can be rotated by a geared motor 4.

    Un ensemble d'usinage est monté en position fixe sur le bâti 1, au-dessus des glissières 2, à peu près au milieu de la longueur de ces dernières. L'ensemble d'usinage 5 comprend trois unités ou postes d'usinage 6 se succédant dans le sens la longueur des glissières 2. Comme le montre surtout la figure 3, chaque poste d'usinage 6 comprend essentiellement une bobine 7 de déroulement d'une bande abrasive 8, une bobine 9 de réenroulement de la bande abrasive 8, un rouleau d'appui 10 sur lequel la bande abrasive 8 passe entre les deux bobines 7 et 9, et un actionneur 11 qui peut être par exemple un vérin pour déplacer vers le bas et vers le haut le rouleau d'appui 10.A machining assembly is mounted in a fixed position on the frame 1, above the runners 2, roughly in the middle of the length of these past. Machining assembly 5 includes three units or stations machining 6 succeeding one another in the direction of the length of the slides 2. As especially shown in Figure 3, each machining station 6 includes essentially a coil 7 for unwinding an abrasive belt 8, a reel 9 for rewinding the abrasive belt 8, a support roller 10 on which the abrasive belt 8 passes between the two coils 7 and 9, and a actuator 11 which can be for example a jack for moving down and upwards the support roller 10.

    De telles unités d'usinage par défilement tangentiel d'une bande abrasive sont bien connues , notamment dans le domaine de la superfinition. A titre d'exemple, il est possible de se référer à la demande de brevet EP-A-495691.Such machining units by tangential movement of a strip abrasive are well known, especially in the field of superfinish. As an example, it is possible to refer to the request EP-A-495691.

    Un ensemble 12 est monté mobile en translation sur les glissières 2. L'ensemble 12 comprend une table 13 rectangulaire guidée sur les glissières 2. La table 13 porte sur sa face inférieure un écrou 14 en prise avec la vis 3.An assembly 12 is mounted movable in translation on the slides 2. The assembly 12 comprises a rectangular table 13 guided on the runners 2. The table 13 carries on its underside a nut 14 in engagement with screw 3.

    Sur sa face supérieure, la table 13 porte, par l'intermédiaire de paliers 15, deux paires de rouleaux 16 horizontaux parallèles, au moins un rouleau de chaque paire étant entraíné en rotation par un moteur 17 monté en dessous de la table 13.On its upper face, the table 13 carries, by means of bearings 15, two pairs of parallel horizontal rollers 16, at least one roller of each pair being rotated by a motor 17 mounted below table 13.

    Comme le montre la figure 3, les rouleaux 16 de chaque paire servent de support à une pièce 18, la rotation des rouleaux 16 entraínant la rotation de la pièce 18 reposant sur ces rouleaux.As shown in Figure 3, the rollers 16 of each pair are used to support a part 18, the rotation of the rollers 16 causing the rotation of the part 18 resting on these rollers.

    Afin d'assurer l'avancement positif de la pièce 18 avec les rouleaux 16 qui la supportent, et d'éviter tout glissement longitudinal de la pièce 18 par rapport aux rouleaux 16, donc tout frottement qui pourrait altérer l'état de surface de la pièce 18, des moyens sont prévus sur la table 13 pour positionner la pièce 18 axialement par rapport aux rouleaux de support 16.In order to ensure the positive advancement of room 18 with the rollers 16 which support it, and to avoid any longitudinal sliding of the part 18 relative to the rollers 16, therefore any friction which could alter the surface condition of part 18, means are provided on the table 13 for positioning the part 18 axially with respect to the rollers support 16.

    Dans l'exemple représenté, ces moyens sont constitués par des taquets 19 à roulement prévus aux extrémités axiales des rouleaux 16 et portant contre l'extrémité postérieure de la pièce 18 pendant l'avancement de cette dernière de gauche à droite sur les figures 1 et 2 en dessous de l'ensemble d'usinage 5. Etant donné que le taquet avance en synchronisme avec les rouleaux 16 et porte contre la face d'extrémité postérieure de la pièce 18, la surface cylindrique de la pièce 18, dont la superfinition est assurée par l'ensemble d'usinage 5, ne subit aucun frottement par rapport aux rouleaux 16, ce qui exclut tout risque d'endommagement de cette surface.In the example shown, these means consist of bearings 19 with bearings provided at the axial ends of the rollers 16 and bearing against the rear end of the part 18 during advancement of the latter from left to right in Figures 1 and 2 below the machining assembly 5. Since the cleat advances in synchronism with rollers 16 and door against the rear end face of the part 18, the cylindrical surface of part 18, the superfinish of which is provided by the machining assembly 5, does not undergo any friction with respect to to the rollers 16, which excludes any risk of damage to this area.

    Du fait que le taquet 19 est un taquet à roulement, un endommagement de la face d'extrémité de la pièce, par frottement avec le taquet, est également exclu. Because the cleat 19 is a rolling cleat, a damage to the end face of the part, by friction with the cleat, is also excluded.

    De préférence, le taquet 19 est disposé en position médiane par rapport aux rouleaux 16 de la paire de rouleaux située devant lui.Preferably, the cleat 19 is arranged in the middle position by compared to the rollers 16 of the pair of rollers located in front of it.

    Dans l'exemple représenté, deux paires de rouleaux 16 sont montées l'une derrière l'autre sur la table 13, pour supporter deux pièces à usiner qui passent successivement sous l'ensemble d'usinage 5. Un taquet 19 est disposé à l'extrémité postérieure de chaque paire de rouleaux 16 et un taquet 19 supplémentaire est disposé à l'extrémité antérieure de la paire de rouleaux 16 antérieure.In the example shown, two pairs of rollers 16 are mounted one behind the other on the table 13, to support two pieces to machining which pass successively under the machining assembly 5. A cleat 19 is arranged at the rear end of each pair of rollers 16 and an additional stopper 19 is arranged at the front end of the pair of rollers 16 anterior.

    Sur la figure 2, l'ensemble mobile 12 est représenté en traits pleins en position de départ (à gauche sur la figure) et en traits mixtes à la position après usinage (à droite sur la figure). Il convient de remarquer à ce sujet que l'ensemble 12 mobile en va-et-vient permet de décharger les pièces, soit dans la position de chargement représentée en traits pleins, après retour de l'ensemble mobile 12 dans cette position, soit dans la position opposée représentée en traits mixtes. Dans ce dernier cas, le déchargement peut se faire indifféremment du même côté que le chargement ou du côté opposé.In FIG. 2, the mobile assembly 12 is shown in lines full in the starting position (on the left in the figure) and in phantom in the position after machining (on the right in the figure). It should be noted at this subject that the movable assembly 12 back and forth makes it possible to discharge the parts, either in the loading position shown in solid lines, after return of the mobile assembly 12 in this position, either in the opposite position shown in phantom. In the latter case, the unloading can be done on the same side as the loading or on the opposite side.

    La machine suivant le mode de réalisation illustré par la figure 4, comprend sur un bâti 101, un ensemble d'usinage 105 mobile en translation, et un ensemble 112 stationnaire portant des paires de rouleaux de support 116. L'ensemble 105 comprenant trois postes d'usinage 106 successifs à bande abrasive est mobile sur des glissières 102, sous l'action d'une vis 103 entraínée par un motoréducteur 104. L'ensemble 112 stationnaire comprend un moteur 117 pour l'entraínement en rotation des rouleaux de support 116. De préférence, des moyens 119 de positionnement qui peuvent être du même type que les taquets 19 du mode de réalisation des figures 1 à 3, peuvent être prévus sur l'ensemble 112 pour assurer le positionnement des pièces par rapport aux rouleaux 116, pendant l'usinage des pièces par translation longitudinale de l'ensemble mobile 105 selon la flèche.The machine according to the embodiment illustrated in FIG. 4, comprises on a frame 101, a machining assembly 105 movable in translation, and a stationary assembly 112 carrying pairs of rollers 116. The assembly 105 comprising three machining stations 106 successive abrasive belt is movable on slides 102, under the action a screw 103 driven by a geared motor 104. The assembly 112 stationary includes a motor 117 for the rotational drive of support rollers 116. Preferably, means 119 for positioning which can be of the same type as the cleats 19 of the mode for carrying out FIGS. 1 to 3, can be provided on the assembly 112 to ensure the positioning of the parts relative to the rollers 116, during the machining of the parts by longitudinal translation of the assembly mobile 105 according to the arrow.

    Il va de soi que les modes de réalisation représentés et décrits n'ont été donnés qu'à titre d'exemples illustratifs et non limitatifs et que de nombreuses modifications et variantes sont possibles dans le cadre de l'invention.It goes without saying that the embodiments shown and described have been given only as illustrative and nonlimiting examples and only many modifications and variants are possible within the framework of the invention.

    Ainsi, l'ensemble d'usinage 5, 105 peut comprendre indifféremment un seul poste d'usinage ou un nombre plus ou moins important de postes successifs en enfilade. L'ensemble 12 ou 112 peut comprendre une seule paire de rouleaux de support 16,116, ou également plus de deux paires successives de rouleaux de support, en fonction de la longueur des pièces à usiner. Les moyens représentés pour le guidage de l'ensemble mobile 5, 112 (glissières 2, 102) et pour l'entraínement en va-et-vient de cet ensemble (vis 3, 103, motoréducteur 4, 104, écrou 14) peuvent également être remplacés par des moyens équivalents remplissant la même fonction. Les taquets 19 en position médiane entre les rouleaux 16 pourraient être remplacés, par exemple, par des moyens de positionnement montés sur les rouleaux de support et tournant avec ces derniers.Thus, the machining assembly 5, 105 can include either a single machining station or a more or less number important successive posts in a row. The set 12 or 112 can include a single pair of support rollers 16,116, or also more than two successive pairs of support rollers, depending on the length of workpieces. The means shown for guiding the mobile assembly 5, 112 (slides 2, 102) and for back-and-forth drive of this assembly (screws 3, 103, gearmotor 4, 104, nut 14) can also be replaced by equivalent means filling the same function. The cleats 19 in the middle position between the rollers 16 could be replaced, for example, by means of positioning mounted on the support rollers and rotating with these last.

    Claims (10)

    Machine d'usinage, en particulier de superfinition, de surfaces cylindriques de pièces de révolution par défilement tangentiel, sur la surface cylindrique d'une pièce, à au moins un poste d'usinage, d'une bande abrasive qui, provenant d'une bobine de déroulement, passe sur un rouleau d'appui avant d'être réenroulé sur une bobine de réenroulement, la pièce étant supportée par une paire de rouleaux de support parallèles espacés, caractérisée par le fait qu'elle comprend un ensemble de support (12, 112), sur lequel les rouleaux de support (16, 116) sont montés mobiles en rotation autour de leurs axes, un ensemble d'usinage (5, 105) portant le ou les postes d'usinage (6, 106), l'un desdits ensemble étant mobile en translation parallèlement à l'axe des rouleaux de support par rapport à l'autre ensemble, des moyens (4, 104) pour entraíner les rouleaux en rotation autour de leurs axes, et des moyens (3, 103) pour déplacer l'un desdits ensemble en translation parallèlement à l'axe des rouleaux de support par rapport à l'autre ensemble.Machine for machining, in particular superfinishing, cylindrical surfaces of parts of revolution by tangential movement, on the cylindrical surface of a workpiece, at least one machining station, a abrasive belt which, coming from an unwinding reel, passes over a back-up roller before being rewound on a rewinding reel, the workpiece supported by a pair of parallel support rollers spaced apart, characterized in that it comprises a support assembly (12, 112), on which the support rollers (16, 116) are mounted movable in rotation about their axes, a machining assembly (5, 105) carrying the machining station (s) (6, 106), one of said assemblies being movable in translation parallel to the axis of the support rollers by relative to the other set, means (4, 104) for training the rollers rotating about their axes, and means (3, 103) for move one of said assemblies in translation parallel to the axis of the support rollers relative to each other. Machine suivant la revendication 1, caractérisée par le fait que l'ensemble d'usinage (105) est mobile et est déplacé en translation par rapport à l'ensemble de support (112) stationnaire.Machine according to claim 1, characterized in that that the machining assembly (105) is mobile and is moved in translation by relative to the stationary support assembly (112). Machine suivant la revendication 1, caractérisée par le fait que l'ensemble de support (12) est mobile et est déplacé en translation par rapport à l'ensemble d'usinage (5) stationnaire.Machine according to claim 1, characterized in that the support assembly (12) is movable and is moved in translation by relative to the stationary machining assembly (5). Machine suivant la revendication 3, caractérisée par le fait que l'ensemble de support (12) mobile comprend au moins une paire de rouleaux de support (16) montés sur une table (13) animée d'un mouvement de translation.Machine according to claim 3, characterized in that the mobile support assembly (12) comprises at least one pair of support rollers (16) mounted on a table (13) with a translational movement. Machine suivant la revendication 3 ou 4, caractérisée par le fait que l'ensemble de support (12, 112) porte au moins un moyen (19, 119) de positionnement de la pièce conçu de manière à agir sur la pièce portée par la paire de rouleaux pour la positionner axialement par rapport aux rouleaux (16, 116) tout en autorisant sa rotation.Machine according to claim 3 or 4, characterized by fact that the support assembly (12, 112) carries at least one means (19, 119) for positioning the part designed to act on the part carried by the pair of rollers to position it axially in relation to to the rollers (16, 116) while allowing its rotation. Machine suivant la revendication 5, caractérisée par le fait que le moyen de positionnement comprend un taquet (19, 119) rotatif participant au mouvement de rotation que la pièce subit pendant l'usinage. Machine according to claim 5, characterized in that the positioning means comprises a rotary cleat (19, 119) participating in the rotational movement that the part undergoes during machining. Machine suivant la revendication 6, caractérisée par le fait que le taquet (19, 1 19) est disposé en position médiane par rapport à la paire de rouleaux de support (16, 116).Machine according to claim 6, characterized in that the cleat (19, 1 19) is disposed in the middle position relative to the pair of support rollers (16, 116). Machine suivant la revendication 4, caractérisée par le fait que les rouleaux de support (16) sont entraínés en rotation par un moteur (17) monté sur la table (13).Machine according to claim 4, characterized in that the support rollers (16) are rotated by a motor (17) mounted on the table (13). Machine suivant l'une quelconque des revendications précédentes, caractérisée par le fait que l'ensemble mobile (12, 105) est déplacé en translation par un système d'entraínement à vis-écrou (3, 4, 103).Machine according to any one of the claims previous, characterized in that the movable assembly (12, 105) is moved in translation by a screw-nut drive system (3, 4, 103). Machine suivant l'une quelconque des revendications précédentes, caractérisée par le fait qu'elle comprend plusieurs postes d'usinage (6, 106) successifs dans la direction de translation.Machine according to any one of the claims previous, characterized by the fact that it includes several positions successive machining operations (6, 106) in the direction of translation.
    EP98402018A 1997-08-12 1998-08-07 Machine tool especially for superfinishing of cylindrical surfaces of revolution by means of a tangential running grinding belt Expired - Lifetime EP0896856B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9710299A FR2767275B1 (en) 1997-08-12 1997-08-12 MACHINE FOR MACHINING, PARTICULARLY SUPERFINITION, OF CYLINDRICAL SURFACES OF PARTS OF REVOLUTION, BY ABRASIVE BELT WITH TANGENTIAL SCROLLING
    FR9710299 1997-08-12

    Publications (2)

    Publication Number Publication Date
    EP0896856A1 true EP0896856A1 (en) 1999-02-17
    EP0896856B1 EP0896856B1 (en) 2003-04-02

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    Application Number Title Priority Date Filing Date
    EP98402018A Expired - Lifetime EP0896856B1 (en) 1997-08-12 1998-08-07 Machine tool especially for superfinishing of cylindrical surfaces of revolution by means of a tangential running grinding belt

    Country Status (5)

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    US (1) US6572459B2 (en)
    EP (1) EP0896856B1 (en)
    DE (1) DE69812795T2 (en)
    ES (1) ES2196511T3 (en)
    FR (1) FR2767275B1 (en)

    Families Citing this family (7)

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    ITUD20040101A1 (en) * 2004-05-17 2004-08-17 Delle Vedove Levigatrici Spa MACHINE TO FINISH AN OBJECT SUCH AS A PROFILE, A PANEL, OR SIMILAR
    DE102006013436B4 (en) * 2006-03-14 2018-10-31 C. & E. Fein Gmbh Belt grinding machine for external cylindrical grinding of pipes
    CN105643403B (en) * 2016-03-07 2017-11-03 无锡振华机械有限公司 Multi-work piece polishing machine
    CN111971148A (en) * 2018-03-14 2020-11-20 磨卡有限公司 Method and apparatus for grinding, and product and use of said product
    CN109746799B (en) * 2019-01-29 2021-06-29 宁波市镇海华磊轴承有限公司 S698 bearing inner and outer ring processing production equipment and process thereof
    CN111496641A (en) * 2020-04-03 2020-08-07 大连富地重工机械制造有限公司 Continuous bar grinding device
    CN111673590A (en) * 2020-06-03 2020-09-18 大连富地重工机械制造有限公司 Grinding device for grinding slender materials

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    GB2206299A (en) * 1987-06-25 1989-01-05 Litton Uk Ltd Loading/unloading plunge centreless grinders
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    US5471796A (en) * 1992-06-12 1995-12-05 Thompson; Gary F. Multi-purpose lathe

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    US2345308A (en) * 1941-07-17 1944-03-28 Chrysler Corp Lapping apparatus
    GB2206299A (en) * 1987-06-25 1989-01-05 Litton Uk Ltd Loading/unloading plunge centreless grinders
    EP0495691A1 (en) * 1991-01-11 1992-07-22 Mecaloir Technologies Cylindrical grinding machine
    US5471796A (en) * 1992-06-12 1995-12-05 Thompson; Gary F. Multi-purpose lathe

    Also Published As

    Publication number Publication date
    FR2767275A1 (en) 1999-02-19
    DE69812795T2 (en) 2004-02-12
    US6572459B2 (en) 2003-06-03
    US20010029159A1 (en) 2001-10-11
    EP0896856B1 (en) 2003-04-02
    ES2196511T3 (en) 2003-12-16
    FR2767275B1 (en) 1999-10-15
    DE69812795D1 (en) 2003-05-08

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