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EP2324955A1 - Finishing machine - Google Patents

Finishing machine Download PDF

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Publication number
EP2324955A1
EP2324955A1 EP10306241A EP10306241A EP2324955A1 EP 2324955 A1 EP2324955 A1 EP 2324955A1 EP 10306241 A EP10306241 A EP 10306241A EP 10306241 A EP10306241 A EP 10306241A EP 2324955 A1 EP2324955 A1 EP 2324955A1
Authority
EP
European Patent Office
Prior art keywords
abrasive belt
cassettes
machine according
abrasive
machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10306241A
Other languages
German (de)
French (fr)
Inventor
Edoardo Sura
Philippe Vandewiel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SA
Renault SAS
Original Assignee
Renault SA
Renault SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SA, Renault SAS filed Critical Renault SA
Publication of EP2324955A1 publication Critical patent/EP2324955A1/en
Withdrawn legal-status Critical Current

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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
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency

Definitions

  • the present invention generally relates to abrasive machining machines, particularly roughing and finishing, and more particularly relates to the change of tools required for machining.
  • grinding In the field of finishing and finishing of machining, it is known to remove the material by abrasion, in particular using an abrasive cloth.
  • This type of machining process known as "grinding” is, for example used for the finishing of cylindrical bearings, including crankshaft bearings intended to come in the crankcase bearings or in the bearings of connecting rods.
  • the patent application EP 0366 506 discloses a machine having, for each workpiece to be machined on a workpiece, a vertically movable swivel arm and abrasive belt application pads mounted on two jaws hinged to the arm and coupled so that they can be clamped together. one against the other.
  • the change time of the abrasive cloth or the workpiece is very long. This change requires the modification of each arm of several elements, including the abrasive tape reel, the enveloping jaws and the advance system, guiding and blocking the tape.
  • the reel of the abrasive belt and the web feed system are, in general, located outside the machining area present at the enveloping jaws.
  • the path of the abrasive cloth is complex and not very accessible. This causes a significant stoppage of the machine in order to perform the modification of the tools required either when changing the abrasive cloth, or in general, when changing the workpiece.
  • the object of the invention is therefore to overcome the drawbacks associated with the use of conventional cloth-making machines and to propose a device allowing a quick and simple change of the tools of the machine or the workpiece and thus to speed up the sequence. modifications to be made by the operator during a change of abrasive cloth or workpiece.
  • a webbing machine comprises a webbing member having two articulated webbing arms, an abrasive tape reel, two jaws adapted to clamp the abrasive web against a workpiece, and web guiding and blocking means. the abrasive belt.
  • the machine comprises two cassettes that can be detachably attached respectively to each of the hinged arms; each of the cassettes comprising a jaw support, means for guiding and blocking the abrasive belt, one of the cassettes further comprising a device for supporting the abrasive belt reel.
  • the abrasive member is intended to surround a range of a piece to be toiled by scrolling an abrasive face of a band on the scope. It comprises two symmetrical arming arms articulated between an open position and a closed position clamping the scope of the workpiece. Each of the arming arms comprises a housing for receiving each of the veiling cassettes.
  • the cassettes form a combined compact assembly mounted directly on a belt member by means of a positioning device and a rapid clamping device.
  • the operator extracts the cassettes by simple and fast disassembly and replaces them with cassettes prepared beforehand, so as to gain machine availability.
  • the clamping device may comprise a stud, a lever connected to an eccentric and a locking piece, so as to block the stud by the locking piece when the lever is lowered.
  • the positioning device of the cassette in the arm of the machine may comprise a ball and a spring; the ball being placed in a predetermined housing of the cassette, so as to accurately position the cassette in the arm of the belt.
  • the means for blocking and guiding the abrasive cloth comprise a jack, a locking pad and two guides of the abrasive cloth.
  • the jack may be pneumatic or mechanical type.
  • an abrasive belt feeding device can be mounted directly on one of the cloth cassettes.
  • the feed device of the abrasive belt may comprise a pinion capable of being driven by a worm mounted on the frame of the machine.
  • the worm can be positioned on the frame of the machine so as to come into contact with one of the gears when opening the wire arm.
  • an abutment is positioned on the frame of the sheeting machine, so as to actuate the opening of the band locking device during the opening of the sheeting arm.
  • the stop may actuate a cylinder pulling a pad so as to release the abrasive belt.
  • the support device of the coil may comprise two flexible plates ensuring the vertical positioning of said coil and the maintenance of tension of the abrasive belt.
  • the machine has a webbing member 2 and two cloth cassettes 10 and 11.
  • the two cloth cassettes can define an upper cassette 10 and a lower cassette 11.
  • the upper veiling cassette 10 comprises a jaw support 12, an upper jaw 5, means 9a for guiding and blocking the abrasive belt 8 and a device 14 for supporting the abrasive belt coil 7.
  • the lower casing 11 comprises a jaw support 13, a lower jaw 6, means 9b for guiding and blocking the abrasive belt 8.
  • the weaving member 2 is intended to surround a bearing of a workpiece 4 and comprises two symmetrical arms 3 articulating between an open position and a closed position clamping the scope of the workpiece 4. One of the arms of 3 can be held fixed and one of the arming arm 3 can be pivoted so as to tighten the reach of the piece to be clothed 4.
  • Each of the arming arm 3 comprises a housing U intended to receive each of the cloth cassettes 10 and 11.
  • the enveloping jaws 5 and 6 envelop the scope to be machined 4 when the two webbing arms 3 articulate in the closed position.
  • the abrasive belt 8 is held by the locking means 9a and 9b, the workpiece can then be rotated.
  • the cloth cassettes 10 and 11 are detachably attached respectively to each of the articulated arms 3.
  • Each cassette 10 and 11 forms a single assembly comprising a jaw support, a jaw and guide means.
  • Each assembly is mounted directly on the webbing member 2 by means of a positioning device 20 and a clamping device 15.
  • the operator extracts the cassettes 10 and 11 from the housings U and replaces them with cassettes prepared beforehand according to the piece to be clothed, which is inserted into the housings U
  • the jaws of the cassettes are adapted to the piece to be clothed, so during a change of part to be clothed, it is enough to remove the cassettes and to replace them by cassettes including the adequate jaws.
  • the operator can either extract the upper cassette 10 comprising the abrasive belt coil 7 and replace it with a cassette comprising a new abrasive belt coil 7, or extract the two cassettes 10 and 11.
  • the simultaneous extraction of the two cassettes makes the machine available more quickly.
  • the positioning device 20 comprises an abutment composed of a spring 21 and a ball 22.
  • the ball 22 is positioned in a housing (not shown ) located in the casing cassette so as to precisely position the casing cassette inside the arming arm 3.
  • the clamping device 15 comprises a stud 16, a lever 17 connected to an eccentric 18 and a locking piece 19.
  • the stud 16 is first mounted on each of the cassettes, then inserting each of the cassettes 10 and 11 in the arms 3, the stud 16 is positioned in a specially designed space inside a locking piece 19, using grooves in the arm 3.
  • the lever 17 then actuated the eccentric 18
  • the force of the eccentric 18 is applied to the locking piece 19 so as to lock the stud 16 in translation.
  • the means 9a for guiding and blocking the abrasive belt 8 comprise at least two guides 24, a jack 23 and a pad 25 that press or release the abrasive belt 8.
  • the jack 23 can be pneumatic type. Thus the cylinder 23 is actuated at the end of the machining cycle, pulling on the pad 25 to release the abrasive belt 8.
  • the means 9b for guiding and blocking the abrasive belt 8 comprise at least two guides 27, a jack 26 and a pad 28 which press or release the strip.
  • the jack 26 may be of the mechanical type.
  • a feed device 30 of the abrasive belt 8 is mounted directly on one of the cassettes.
  • This feed device 30 is composed of three pinions 31, 32, 33 held in position by a resilient means 39 of the spring type.
  • the abrasive belt. 8 is blocked by the locking means 9a and 9b. Then when the machining is finished, the abrasive belt 8 can advance thanks to the feed device 30.
  • the abrasive belt 8 is tensioned by means of a tensioning device 37 consisting of two pulleys 38, one of which is mounted on the arming arm 3 by means of a spring and the other is located on the casing cassette 10.
  • one of the pinions 32 is capable of being driven by a worm 34 mounted on the frame 36 of the machine.
  • the worm 34 is positioned on the frame 36 so as to come into contact with the pinion 32 during the opening of the weaving arm 3.
  • the weaving member 2 descends so as to actuate a stop 35 positioned on the frame 36.
  • the stop 35 in turn actuates the mechanical jack 26 of the band locking means 9b, which removes the blocking pad 28 pressed against the abrasive belt 8.
  • the worm 34 can be actuated so as to mesh with the pinion 32 and move the abrasive belt 8.
  • the clamping device 15 shown is in the unclamped position.
  • the stud 16 can be positioned in a housing of the locking piece 19. In this position, the pad 16 is free and the clothing cassette is not fixed in the arm 3 of the cloth.
  • the clamping device 15 shown is in the clamped position.
  • the lever 17 is actuated, the eccentric 18 then comes to press the locking piece 19 so as to block the head of the stud 16 in a fixed position. In this position, the pad 16 is not movable and the clothing cassette is thus fixed in the arm 3 of cloth,
  • This device 15 allows a strong, fast and compact.
  • the support device 14 of the coil 7 comprises two flexible plates 29 comprising two symmetrical hubs located in the center of each plate.
  • the flexible plates 29 are inclined towards the inside of the support device 14, so as to hold the abrasive belt coil 7.
  • the two hubs located on the flexible plates 29 are inserted in the center of the coil 7 abrasive belt.
  • the abrasive belt coil 7 is positioned vertically in the support device 14 of the coil and held by the two hubs.
  • the pneumatic cylinder 23 is actuated automatically, thus allowing the abrasive belt 8 to be released.
  • the lower arming arm 3 can then articulate downwards, allowing the lower cassette 11 to press on the abutment 35.
  • the mechanical jack 26 is actuated by means of a rod system, to release in turn the abrasive belt 8.
  • the abrasive belt 8 is provided by the feed device 30. Once the abrasive belt. 8 advanced, the lower arm 3 returns to its initial position, and the pad 28 pinches the abrasive belt 8 in the lower cassette 11.
  • the clamping device 15 When changing the abrasive belt 8 or the workpiece 4, the clamping device 15 is placed in the free position of the figure 3a , and the cassettes 10 and 11 are removed from the housings U located in the arming arms 3. New cassettes prepared beforehand are positioned accurately in each of the housing U of the arming arm 3 by the positioning device 20.
  • the ball 22 of the positioning device 20 is inserted into a housing (not shown) located in the veiling cassette, the pilot 16 is positioned, by a groove in the arming arm 3, inside the locking piece 19.
  • the lever 17 is then actuated, as shown in FIG. figure 3b , pressing against the locking piece 19 and clamp the pad 16.
  • Each of the cassettes is thus robustly maintained in each arm of the cloth 3.
  • the cloth cassettes can be prepared outside the enclosure of the machine, thus obtaining better safety and ergonomics for the operator.
  • belt grinding tape that just described also provide a reduction of tool change time and workpiece and thus a better machine availability and playability of production

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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

Une machine de toilage (1) comprenant un organe de toilage (2) comportant deux bras de toilage articulés (3), une bobine de bande abrasive (7), deux mâchoires (5, 6) adaptées pour serrer la bande abrasive (8) contre une pièce à usiner (4) et des moyens (9a, 9b) de guidage et de blocage de la bande abrasive (8). Ladite machine de toilage (1) comporte deux cassettes (10, 11) pouvant être fixées de manière amovible respectivement sur chacun des bras articulés (3) ; chacune des cassettes comportant un support de mâchoire (12, 13) et des moyens (9a. 9b) de guidage et blocage de la bande abrasive, l'une des cassettes comportait en outre un dispositif de support (M) de la bobine (7) de bande abrasive.A grooming machine (1) comprising a grooming member (2) comprising two articulated grooming arms (3), a reel of abrasive belt (7), two jaws (5, 6) adapted to tighten the abrasive belt (8) against a workpiece (4) and means (9a, 9b) for guiding and locking the abrasive belt (8). Said grooming machine (1) comprises two cassettes (10, 11) which can be detachably fixed respectively on each of the articulated arms (3); each of the cassettes comprising a jaw support (12, 13) and means (9a. 9b) for guiding and locking the abrasive belt, one of the cassettes further included a support device (M) for the reel (7 ) abrasive belt.

Description

La présente invention concerne, de manière générale, les machines d'usinage par abrasion, notamment l'ébauche et la finition, et, se rapporte plus particulièrement au changement d'outils nécessaires pour l'usinage.The present invention generally relates to abrasive machining machines, particularly roughing and finishing, and more particularly relates to the change of tools required for machining.

Dans le domaine de la finition et de la superfinition d'usinage, il est connu d'enlever de la matière par abrasion, notamment à l'aide d'une toile abrasive. Ce type de procédé d'usinage dit par « toilage » est, par exemple utilisé pour la finition des portées cylindriques, notamment des portées de vilebrequins destinés à venir dans les paliers de carters moteur ou dans les paliers de bielles.In the field of finishing and finishing of machining, it is known to remove the material by abrasion, in particular using an abrasive cloth. This type of machining process known as "grinding" is, for example used for the finishing of cylindrical bearings, including crankshaft bearings intended to come in the crankcase bearings or in the bearings of connecting rods.

La demande de brevet EP 0366 506 décrit une machine de toilage comportant pour chaque portée à usiner sur une pièce, un bras pivotant et mobile verticalement et des patins d'application d'une bande abrasive montés sur deux mâchoires articulées sur le bras et couplés de manière à pouvoir être serrés l'un contre l'autre. Lors d'opérations de toilage, le temps de changement de la toile abrasive ou de la pièce à usiner est très long. Ce changement nécessite la modification sur chaque bras de toilage de plusieurs éléments, notamment la bobine de bande abrasive, les mâchoires enveloppantes et le système d'avance, de guidage et de blocage de la bande. La bobine de la bande abrasive et le système d'avance de la toile sont, en général, situés en dehors de la zone d'usinage présente au niveau des mâchoires enveloppantes. Dans un tel dispositif, le cheminement de la toile abrasive est complexe et peu accessible. Ceci engendre un arrêt important de la machine afin d'effectuer la modification des outils nécessaires soit lors du changement de toile abrasive, soit de manière générale, lors du changement de pièce à usiner.The patent application EP 0366 506 discloses a machine having, for each workpiece to be machined on a workpiece, a vertically movable swivel arm and abrasive belt application pads mounted on two jaws hinged to the arm and coupled so that they can be clamped together. one against the other. During abrasive operations, the change time of the abrasive cloth or the workpiece is very long. This change requires the modification of each arm of several elements, including the abrasive tape reel, the enveloping jaws and the advance system, guiding and blocking the tape. The reel of the abrasive belt and the web feed system are, in general, located outside the machining area present at the enveloping jaws. In such a device, the path of the abrasive cloth is complex and not very accessible. This causes a significant stoppage of the machine in order to perform the modification of the tools required either when changing the abrasive cloth, or in general, when changing the workpiece.

En immobilisant ainsi la machine, lors de modification à apporter, le rendement de production des pièces à toiler est fortement diminué, ceci a inévitablement un impact sur le coût de production des pièces.By thus immobilizing the machine, during modification to be made, the production yield of the parts to be cleaned is greatly reduced, this inevitably has an impact on the cost of production of the parts.

Le but de l'invention est donc de pallier les inconvénients liés à l'utilisation des machines de toilage conventionnelles et de proposer un dispositif permettant un changement rapide et simple des outils de toilage ou des pièce à usiner et donc d'accélérer l'enchaînement des modifications à apporter par l'opérateur lors d'un changement de toile abrasive ou de pièce à usiner.The object of the invention is therefore to overcome the drawbacks associated with the use of conventional cloth-making machines and to propose a device allowing a quick and simple change of the tools of the machine or the workpiece and thus to speed up the sequence. modifications to be made by the operator during a change of abrasive cloth or workpiece.

Dans un mode de réalisation, une machine de toilage comprend un organe de toilage comportant deux bras de toilage articulés, une bobine de bande abrasive, deux mâchoires adaptées pour serrer la bande abrasive contre une pièce à usiner et des moyens de guidage et de blocage de la bande abrasive. La machine comporte deux cassettes pouvant être fixées de manière amovible respectivement sur chacun des bras de toilage articulés ; chacune des cassettes comportant un support de mâchoire, des moyens de guidage et de blocage de la bande abrasive, l'une des cassettes comportant en outre un dispositif de support de la bobine de bande abrasive.In one embodiment, a webbing machine comprises a webbing member having two articulated webbing arms, an abrasive tape reel, two jaws adapted to clamp the abrasive web against a workpiece, and web guiding and blocking means. the abrasive belt. The machine comprises two cassettes that can be detachably attached respectively to each of the hinged arms; each of the cassettes comprising a jaw support, means for guiding and blocking the abrasive belt, one of the cassettes further comprising a device for supporting the abrasive belt reel.

L'organe de toilage est destiné à entourer une portée d'une pièce à toiler par défilement d'une face abrasive d'une bande sur la portée. Il comporte deux bras de toilage symétriques articulés entre une position ouverte et une position fermée serrant la portée de la pièce à usiner. Chacun des bras de toilage comprend un logement destiné à recevoir chacune des cassettes de voilage.The abrasive member is intended to surround a range of a piece to be toiled by scrolling an abrasive face of a band on the scope. It comprises two symmetrical arming arms articulated between an open position and a closed position clamping the scope of the workpiece. Each of the arming arms comprises a housing for receiving each of the veiling cassettes.

Les cassettes forment un ensemble compact combiné monté directement sur organe de toilage au moyen d'un dispositif de positionnement et d'un dispositif de bridage rapide. Ainsi, lors du changement de la bande abrasive ou de pièce à usiner, l'opérateur extrait les cassettes par un démontage simple et rapide et les remplace par des cassettes préparées au préalable, de façon à gagner en disponibilité machine.The cassettes form a combined compact assembly mounted directly on a belt member by means of a positioning device and a rapid clamping device. Thus, when changing the abrasive belt or workpiece, the operator extracts the cassettes by simple and fast disassembly and replaces them with cassettes prepared beforehand, so as to gain machine availability.

Par exemple, le dispositif de bridage peut comporter un plot, un levier relié un excentrique et une pièce de blocage, de façon à venir bloquer le plot par la pièce de blocage lorsque l'on abaisse le levier.For example, the clamping device may comprise a stud, a lever connected to an eccentric and a locking piece, so as to block the stud by the locking piece when the lever is lowered.

Le dispositif de positionnement de la cassette dans le bras de toilage peut comporter une bille et un ressort ; la bille venant se placer dans un logement prédétermine de la cassette, de manière à positionner de façon précise la cassette dans le bras de toilage.The positioning device of the cassette in the arm of the machine may comprise a ball and a spring; the ball being placed in a predetermined housing of the cassette, so as to accurately position the cassette in the arm of the belt.

Avantageusement, les moyens de blocage et de guidage de la toile abrasive comprennent un vérin, un patin de blocage et deux guides de la toile abrasive. Le vérin pourra être de type pneumatique ou mécanique.Advantageously, the means for blocking and guiding the abrasive cloth comprise a jack, a locking pad and two guides of the abrasive cloth. The jack may be pneumatic or mechanical type.

Selon une autre caractéristique, un dispositif d'avance de la bande abrasive peut être monté directement sur une des cassettes de toilage. Par exemple, le dispositif d'avance de la bande abrasive peut comprendre un pignon capable d'être entraîné par une vis sans fin montée sur le bâti de la machine. La vis sans fin peut être positionnée sur le bâti de la machine de façon à entrer en contact avec un des pignons lors de l'ouverture bras de toilage.According to another characteristic, an abrasive belt feeding device can be mounted directly on one of the cloth cassettes. For example, the feed device of the abrasive belt may comprise a pinion capable of being driven by a worm mounted on the frame of the machine. The worm can be positioned on the frame of the machine so as to come into contact with one of the gears when opening the wire arm.

Dans un mode de réalisation, une butée est positionnée sur le bâti de la machine de voilage, de façon à actionner l'ouverture du dispositif de blocage de la bande lors de l'ouverture du bras de toilage. Par exemple, la butée peut actionner un vérin tirant un patin de façon à libérer la bande abrasive.In one embodiment, an abutment is positioned on the frame of the sheeting machine, so as to actuate the opening of the band locking device during the opening of the sheeting arm. For example, the stop may actuate a cylinder pulling a pad so as to release the abrasive belt.

En ce qui concerne le dispositif de support de la bobine, celui-ci peut comprendre deux plaques flexibles assurant le positionnement vertical de ladite bobine ainsi que le maintien en tension de la bande abrasive.As regards the support device of the coil, it may comprise two flexible plates ensuring the vertical positioning of said coil and the maintenance of tension of the abrasive belt.

D'autres buts, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante, donnée uniquement à titre d'exemple non limitatif, et faite en référence aux dessins annexes, sur lesquels:

  • la figure 1 est une vue d'une machine de toilage;
  • la figure 2 montre le déblocage de la bande abrasive dans une des cassettes de toilage;
  • les figures 3(a) et 3(b) montrent le dispositif de bridage des cassettes dans l'organe de toilage ;
  • les figures 4(a) et 4(b) montrent le centrage et le maintien de la bobine sur son support ;
Other objects, features and advantages of the invention will become apparent on reading the following description, given solely by way of nonlimiting example, and with reference to the appended drawings, in which:
  • the figure 1 is a view of a machine;
  • the figure 2 shows the unblocking of the abrasive belt in one of the cloth cassettes;
  • the Figures 3 (a) and 3 (b) show the clamping device of the cassettes in the belt member;
  • the Figures 4 (a) and 4 (b) show the centering and the maintenance of the coil on its support;

Sur la figure 1 est représentée une machine de toilage, désignée par la référence 1.On the figure 1 is shown a machine for washing, designated by the reference 1.

Dans l'application envisagé, la machine de toilage comporte un organe de toilage 2 et deux cassettes de toilage 10 et 11 . Les deux cassettes de toilage peuvent définir une cassette supérieure 10 et une cassette inférieure 11.In the application envisaged, the machine has a webbing member 2 and two cloth cassettes 10 and 11. The two cloth cassettes can define an upper cassette 10 and a lower cassette 11.

La cassette supérieure de voilage 10 comporte un support de mâchoire 12, une mâchoire supérieure 5, des moyens 9a de guidage et de blocage de la bande abrasive 8 et un dispositif 14 de support de la bobine 7 de bande abrasive.The upper veiling cassette 10 comprises a jaw support 12, an upper jaw 5, means 9a for guiding and blocking the abrasive belt 8 and a device 14 for supporting the abrasive belt coil 7.

La cassette inférieure de toilage 11 comporte un support de mâchoire 13, une mâchoire inférieure 6, des moyens 9b de guidage et de blocage de la bande abrasive 8.The lower casing 11 comprises a jaw support 13, a lower jaw 6, means 9b for guiding and blocking the abrasive belt 8.

L'organe de toilage 2 est destiné à entourer une portée d'une pièce à toiler 4 et comporte deux bras 3 symétriques s'articulant entre une position ouverte et une position fermée serrant la portée de la pièce à toiler 4. Un des bras de toilage 3 peut être maintenu fixe et un des bras de toilage 3 peut être pivotant de façon à venir serrer la portée de la pièce à toiler 4. Chacun des bras de toilage 3 comprend un logement U destiné à recevoir chacune des cassettes de toilage 10 et 11.The weaving member 2 is intended to surround a bearing of a workpiece 4 and comprises two symmetrical arms 3 articulating between an open position and a closed position clamping the scope of the workpiece 4. One of the arms of 3 can be held fixed and one of the arming arm 3 can be pivoted so as to tighten the reach of the piece to be clothed 4. Each of the arming arm 3 comprises a housing U intended to receive each of the cloth cassettes 10 and 11.

Les mâchoires enveloppantes 5 et 6 viennent envelopper la portée à usiner 4 lorsque les deux bras de toilage 3 de toilage s'articulent en position fermée. Lorsque la bande abrasive 8 est maintenue par les moyens 9a et 9b de blocage, la pièce à usiner peut alors être entraînée en rotation.The enveloping jaws 5 and 6 envelop the scope to be machined 4 when the two webbing arms 3 articulate in the closed position. When the abrasive belt 8 is held by the locking means 9a and 9b, the workpiece can then be rotated.

Les cassettes de toilage 10 et 11 sont fixées de manière amovible respectivement sur chacun des bras articulés 3. Chaque cassette 10 et 11 forme un ensemble unique comprenant un support de mâchoire, une mâchoire et des moyens de guidages. Chaque ensemble est monté directement sur l'organe de toilage 2 à l'aide d'un dispositif de positionnement 20 et d'un dispositif de bridage 15. Ainsi, lors du changement de la bande abrasive 8 ou de pièce à usiner, l'opérateur extrait les cassettes 10 et 11 des logements U et les remplace par des cassettes préparées au préalable en fonction de la pièce à toiler, qu'il vient insérer dans les logements U situés dans les bras de toilage 3. Les mâchoires des cassettes sont adaptées à la pièce à toiler, ainsi lors d'un changement de pièce à toiler, il suffit de retirer les cassettes et de les remplacer par des cassettes comprenant les mâchoires adéquates. Lors d'un changement de toile abrasive, l'opérateur peut soit uniquement extraire la cassette supérieure 10 comprenant la bobine 7 de bande abrasive et la remplacer par une cassette comprenant une nouvelle bobine 7 de bande abrasive, soit extraire les deux cassettes 10 et 11. Toutefois, l'extraction simultanée des deux cassettes permet de rendre la machine disponible plus rapidement.The cloth cassettes 10 and 11 are detachably attached respectively to each of the articulated arms 3. Each cassette 10 and 11 forms a single assembly comprising a jaw support, a jaw and guide means. Each assembly is mounted directly on the webbing member 2 by means of a positioning device 20 and a clamping device 15. Thus, during the changing the abrasive belt 8 or the workpiece, the operator extracts the cassettes 10 and 11 from the housings U and replaces them with cassettes prepared beforehand according to the piece to be clothed, which is inserted into the housings U The jaws of the cassettes are adapted to the piece to be clothed, so during a change of part to be clothed, it is enough to remove the cassettes and to replace them by cassettes including the adequate jaws. During an abrasive cloth change, the operator can either extract the upper cassette 10 comprising the abrasive belt coil 7 and replace it with a cassette comprising a new abrasive belt coil 7, or extract the two cassettes 10 and 11. However, the simultaneous extraction of the two cassettes makes the machine available more quickly.

Dans le mode de réalisation illustré sur la figure 1, le dispositif de positionnement 20 comprend une butée composée d'un ressort 21 et d'une bille 22. Lors de l'insertion de la cassette de toilage dans le bras de toilage 3, la bille 22 se positionne dans un logement (non représenté) situé dans la cassette de toilage de manière à positionner de façon précise la cassette de voilage à l'intérieur du bras de toilage 3.In the embodiment illustrated on the figure 1 , the positioning device 20 comprises an abutment composed of a spring 21 and a ball 22. During the insertion of the clothing cassette into the arming arm 3, the ball 22 is positioned in a housing (not shown ) located in the casing cassette so as to precisely position the casing cassette inside the arming arm 3.

Le dispositif de bridage 15 comporte un plot 16, un levier 17 relié à un excentrique 18 et une pièce de blocage 19. Le plot 16 est d'abord monté sur chacune des cassettes, puis en insérant chacune des cassettes 10 et 11 dans les bras de toilage 3, le plot 16 vient se positionner dans un espace spécialement conçu à l'intérieur d'une pièce de blocage 19, à l'aide de rainures situées dans le bras de toilage 3. Le levier 17 actionné ensuite l'excentrique 18. L'effort de l'excentrique 18 est appliqué à la pièce de blocage 19 de façon à venir bloquer en translation le plot 16.The clamping device 15 comprises a stud 16, a lever 17 connected to an eccentric 18 and a locking piece 19. The stud 16 is first mounted on each of the cassettes, then inserting each of the cassettes 10 and 11 in the arms 3, the stud 16 is positioned in a specially designed space inside a locking piece 19, using grooves in the arm 3. The lever 17 then actuated the eccentric 18 The force of the eccentric 18 is applied to the locking piece 19 so as to lock the stud 16 in translation.

De cette manière, les cassettes 10 et 11 sont maintenues dans les bras de toilage 3 de façon simple et robuste.In this way, the cassettes 10 and 11 are held in the arming arms 3 in a simple and robust manner.

Les moyens 9a de guidage et de blocage de la bande abrasive 8 comprennent au moins deux guides 24, un vérin 23 et un patin 25 venant serrer ou libérer la bande abrasive 8. Le vérin 23 peut être de type pneumatique. Ainsi le vérin 23 est actionné à la fin du cycle d'usinage, tirant sur le patin 25 afin de libérer la bande abrasive 8.The means 9a for guiding and blocking the abrasive belt 8 comprise at least two guides 24, a jack 23 and a pad 25 that press or release the abrasive belt 8. The jack 23 can be pneumatic type. Thus the cylinder 23 is actuated at the end of the machining cycle, pulling on the pad 25 to release the abrasive belt 8.

Les moyens 9b de guidage et de blocage de la bande abrasive 8 comprennent au moins deux guides 27, un vérin 26 et un patin 28 venant serrer ou libérer la bande. Le vérin 26 peut être de type mécanique.The means 9b for guiding and blocking the abrasive belt 8 comprise at least two guides 27, a jack 26 and a pad 28 which press or release the strip. The jack 26 may be of the mechanical type.

Dans un mode de réalisation préféré, un dispositif d'avance 30 de la bande abrasive 8 est monté directement sur une des cassettes. Ce dispositif d'avance 30 est composé de trois pignons 31, 32, 33 maintenus en position par un moyen élastique 39 de type ressort. Lors de l'usinage d'une pièce 4, la bande abrasive. 8 est bloquée par les moyens de blocage 9a et 9b. Puis lorsque l'usinage est terminé, la bande abrasive 8 peut avancer grâce au dispositif d'avance 30. La bande abrasive 8 est tendue à l'aide d'un dispositif 37 de mise en tension constitué de deux poulies 38, dont une est montée sur le bras de toilage 3 à l'aide d'un ressort et l'autre est située sur la cassette de toilage 10.In a preferred embodiment, a feed device 30 of the abrasive belt 8 is mounted directly on one of the cassettes. This feed device 30 is composed of three pinions 31, 32, 33 held in position by a resilient means 39 of the spring type. When machining a part 4, the abrasive belt. 8 is blocked by the locking means 9a and 9b. Then when the machining is finished, the abrasive belt 8 can advance thanks to the feed device 30. The abrasive belt 8 is tensioned by means of a tensioning device 37 consisting of two pulleys 38, one of which is mounted on the arming arm 3 by means of a spring and the other is located on the casing cassette 10.

Comme on le voit sur la figure 2, un des pignons 32 est capable d'être entraîné par une vis sans fin 34 montée sur le bâti 36 de la machine. La vis sans fin 34 est positionnée sur le bâti 36 de façon à entrer en contact avec le pignon 32 lors de l'ouverture du bras de toilage 3. Lorsque l'on souhaite faire avancer la bande abrasive 8, l'organe de toilage 2 descend de façon à actionner une butée 35 positionnée sur le bâti 36. La butée 35 actionne à son tour le vérin mécanique 26 du moyen 9b de blocage de la bande, ce qui retire le patin de blocage 28 appuyé contre la bande abrasive 8. Une fois la bande abrasive 8 libérée, la vis sans fin 34 peut être actionnée de façon à engrener sur le pignon 32 et à déplacer la bande abrasive 8.As we see on the figure 2 , one of the pinions 32 is capable of being driven by a worm 34 mounted on the frame 36 of the machine. The worm 34 is positioned on the frame 36 so as to come into contact with the pinion 32 during the opening of the weaving arm 3. When it is desired to advance the abrasive belt 8, the weaving member 2 descends so as to actuate a stop 35 positioned on the frame 36. The stop 35 in turn actuates the mechanical jack 26 of the band locking means 9b, which removes the blocking pad 28 pressed against the abrasive belt 8. A Once the abrasive belt 8 has been released, the worm 34 can be actuated so as to mesh with the pinion 32 and move the abrasive belt 8.

Sur la figure 3a, le dispositif de bridage 15 représenté est en position non bridée. Le plot 16 peut se positionner dans un logement de la pièce de blocage 19. Dans cette position, le plot 16 est libre et la cassette de toilage n'est pas fixée dans le bras 3 de toilage. Sur la figure 3b, le dispositif de bridage 15 représenté est en position bridée. Le levier 17 est actionné, l'excentrique 18 vient alors appuyer sur la pièce de blocage 19 de façon à venir bloquer la tête du plot 16 en position fixe. Dans cette position, le plot 16 n'est pas mobile et la cassette de toilage est ainsi fixée dans le bras 3 de toilage, Ce dispositif 15 permet un bridage robuste, rapide et peu encombrant.On the figure 3a , the clamping device 15 shown is in the unclamped position. The stud 16 can be positioned in a housing of the locking piece 19. In this position, the pad 16 is free and the clothing cassette is not fixed in the arm 3 of the cloth. On the figure 3b , the clamping device 15 shown is in the clamped position. The lever 17 is actuated, the eccentric 18 then comes to press the locking piece 19 so as to block the head of the stud 16 in a fixed position. In this position, the pad 16 is not movable and the clothing cassette is thus fixed in the arm 3 of cloth, This device 15 allows a strong, fast and compact.

Comme on le voit sur la figure 4a, le dispositif de support 14 de la bobine 7 comporte deux plaques flexibles 29 comprenant deux moyeux symétriques situés au centre de chaque plaque. Les plaques flexibles 29 sont inclinées vers l'intérieur du dispositif de support 14, de façon à maintenir la bobine 7 de bande abrasive.As we see on the figure 4a , the support device 14 of the coil 7 comprises two flexible plates 29 comprising two symmetrical hubs located in the center of each plate. The flexible plates 29 are inclined towards the inside of the support device 14, so as to hold the abrasive belt coil 7.

Sur la figure 4b, les deux moyeux situés sur les plaques flexibles 29 viennent s'insérer au centre de la bobine 7 de bande abrasive. De cette manière, la bobine 7 de bande abrasive est positionnée verticalement dans le dispositif 14 de support de la bobine et maintenue par les deux moyeux.On the figure 4b , the two hubs located on the flexible plates 29 are inserted in the center of the coil 7 abrasive belt. In this way, the abrasive belt coil 7 is positioned vertically in the support device 14 of the coil and held by the two hubs.

A la fin du cycle d'usinage d'une pièce, le vérin pneumatique 23 est actionné automatiquement, permettant ainsi à la bande abrasive 8 d'être libérée. Le bras de toilage inférieur 3 peut ensuite s'articuler vers le bas, permettant à la cassette inférieure 11, d'appuyer sur la butée 35. Lors de l'appui de la cassette inférieure 11 sur la butée 35, le vérin mécanique 26 est actionné à l'aide d'un système à bielle, permettant de libérer à son tour la bande abrasive 8. La traction de à bande abrasive 8 est assurée grâce au dispositif d'avance 30. Une fois la bande abrasive. 8 avancée, le bras inférieur 3 revient dans sa position initiale, et le patin 28 vient pincer la bande abrasive 8 dans la cassette inférieure 11. Lorsque le bras inférieur 3 vient serrer la portée à toiler contre la pièce à usiner 4, le vérin pneumatique 23 revient dans sa position initiale, de façon à pincer la bande abrasive 8 à l'aide du patin 25. La pièce à usiner 4 est ainsi prête à être toilée. L'écartement des deux bras 3 est fonction de la bande abrasive 8 entourée autour de la pièce 4.At the end of the machining cycle of a part, the pneumatic cylinder 23 is actuated automatically, thus allowing the abrasive belt 8 to be released. The lower arming arm 3 can then articulate downwards, allowing the lower cassette 11 to press on the abutment 35. When the lower cassette 11 is pressed against the abutment 35, the mechanical jack 26 is actuated by means of a rod system, to release in turn the abrasive belt 8. The abrasive belt 8 is provided by the feed device 30. Once the abrasive belt. 8 advanced, the lower arm 3 returns to its initial position, and the pad 28 pinches the abrasive belt 8 in the lower cassette 11. When the lower arm 3 comes to tighten the scope to be toiled against the workpiece 4, the pneumatic cylinder 23 returns to its initial position, so as to pinch the abrasive belt 8 with the pad 25. The workpiece 4 is thus ready to be clothed. The spacing of the two arms 3 is a function of the abrasive belt 8 surrounded around the part 4.

Lors du changement de bande abrasive 8 ou de pièce à toiler 4, le dispositif de bridage 15 est mis dans la position libre de la figure 3a, et les cassettes 10 et 11 sont retirées des logements U situés dans les bras de toilage 3. De nouvelles cassettes préparées au préalable sont positionnées de façon précise dans chacun des logements U des bras de toilage 3 grâce au dispositif de positionnement 20. La bille 22 du dispositif de positionnement 20 vient s'insérer dans un logement (non représenté) situé dans la cassette de voilage, Le pilot 16 vient se positionner, par une rainure dans le bras de toilage 3, à l'intérieur de la pièce de blocage 19. Le levier 17 est ensuite actionné, comme illustré sur la figure 3b, venant appuyer sur la pièce de blocage 19 et brider le plot 16. Chacune des cassettes est ainsi maintenue de façon robuste dans chaque bras de toilage 3.When changing the abrasive belt 8 or the workpiece 4, the clamping device 15 is placed in the free position of the figure 3a , and the cassettes 10 and 11 are removed from the housings U located in the arming arms 3. New cassettes prepared beforehand are positioned accurately in each of the housing U of the arming arm 3 by the positioning device 20. The ball 22 of the positioning device 20 is inserted into a housing (not shown) located in the veiling cassette, the pilot 16 is positioned, by a groove in the arming arm 3, inside the locking piece 19. The lever 17 is then actuated, as shown in FIG. figure 3b , pressing against the locking piece 19 and clamp the pad 16. Each of the cassettes is thus robustly maintained in each arm of the cloth 3.

Grâce la machine de toilage qui vient d'être décrite, les cassettes de toilage peuvent être préparées en dehors de l'enceinte de la machine, obtenant ainsi une meilleure sécurité et ergonomie pour l'opérateur.Thanks to the machine that has just been described, the cloth cassettes can be prepared outside the enclosure of the machine, thus obtaining better safety and ergonomics for the operator.

On notera que les cassettes de toilage qui viennent d'être décrites procurent également une réduction du temps de changement d'outils et de pièce à usiner et donc une meilleure disponibilité de la machine ainsi qu'un meilleur rendement de la production,Note that the belt grinding tape that just described also provide a reduction of tool change time and workpiece and thus a better machine availability and playability of production,

Claims (10)

Machine de toilage (1) comprenant un organe de toilage (2) comportant deux bras de toilage articulés (3), une bobine de bande abrasive (7), deux mâchoires (5, 6) adaptées pour serrer la bandé abrasive (8) contre une pièce à usiner (4) et des moyens (9a, 9b) de guidage et de blocage de la bande abrasive (8), caractérisée en ce que ladite machine de voilage (1) comporte deux cassettes (10, 11) pouvant être fixées de manière amovible respectivement sur chacun des bras articulés (3) chacune des cassettes comportant un support de mâchoire (12, 13) et des moyens (9a, 9b) de guidage et blocage de la bande abrasive (8), l'une des cassettes comportant en outre un dispositif de support (14) de la bobine (7) de bande abrasive.A machine (1) comprising a webbing member (2) comprising two articulated webbing arms (3), an abrasive belt web (7), two jaws (5, 6) adapted to clamp the abrasive webbing (8) against a workpiece (4) and means (9a, 9b) for guiding and blocking the abrasive belt (8), characterized in that said voiding machine (1) comprises two cassettes (10, 11) which can be fixed releasably respectively on each of the articulated arms (3) each of the cassettes having a jaw support (12, 13) and means (9a, 9b) for guiding and locking the abrasive belt (8), one of the cassettes further comprising a support device (14) for the abrasive belt spool (7). Machine selon ta revendication 1, dans laquelle l'organe de toilage comporte deux bras symétriques articulés entre une position ouverte et une position fermée serrant une portée de la pièce à usiner (4), Lesdits bras de toilage présentent un logement (U).Machine according to claim 1, wherein the belt member comprises two symmetrical arms articulated between an open position and a closed position clamping a bearing surface of the workpiece (4), said armies have a housing (U). Machine de toilage selon la revendication 1 ou 2, dans laquelle chacune des cassettes est insérée dans le logement (U) du bras de toilage, puis fixée au moyen d'un dispositif de bridage (15), comportant un plot (16) et un levier (17) relié à un excentrique (18).A machine according to claim 1 or 2, wherein each of the cassettes is inserted into the housing (U) of the arming arm, and then fixed by means of a clamping device (15), comprising a stud (16) and a lever (17) connected to an eccentric (18). Machine de toilage selon l'une des revendications 1 à 3, dans laquelle chacune des cassettes est positionnée dans le bras de toilage (3) au moyen d'un dispositif de positionnement (20), comportant une bille (22) et un ressort (21), ladite bille (22) venant se placer dans un logement prédéterminé de la cassette.A machine according to one of claims 1 to 3, wherein each of the cassettes is positioned in the arm (3) by means of a positioning device (20), comprising a ball (22) and a spring ( 21), said ball (22) being placed in a predetermined housing of the cassette. Machine de toilage selon l'une des revendications 1 à 4, caractérisé en ce que le dispositif (9a) de blocage de la bande abrasive comprend un vérin pneumatique (23), un patin de blocage (25) et deux guides (24) de la bande abrasive (8).A machine according to one of claims 1 to 4, characterized in that the device (9a) for blocking the abrasive belt comprises a pneumatic cylinder (23), a locking shoe (25) and two guides (24) of the abrasive belt (8). Machine de toilage selon l'une des revendications 1 à 5, caractérisé en ce que le dispositif (9b) de blocage de la bande abrasive comprend un vérin mécanique (26), un patin de blocage (28) et deux guides (27) de la bande abrasive (8).Toasting machine according to one of claims 1 to 5, characterized in that the device (9b) for blocking the abrasive belt comprises a mechanical jack (26), a locking shoe (28) and two guides (27) of the abrasive belt (8). Machine de toilage selon l'une des revendications 1 à 6 comprenant un dispositif d'avance (30) de la bande abrasive monté directement sur une des cassettes de toilage, ledit dispositif d'avance (30) de la bande abrasive (8) comprenant un pignon (32) capable d'être entraîné par une vis sans fin (34).Weaving machine according to one of claims 1 to 6, comprising an abrasive belt feed device (30) mounted directly on one of the weaving cassettes, said feed device (30) for the abrasive belt (8) comprising a pinion (32) capable of being driven by a worm (34). Machine de toilage selon la revendication 7, selon laquelle la vis sans fin (34) est positionnée sur le bâti (36) de façon entrer en contact avec le pignon (32) lors de l'ouverture du bras de toilage (3).A machine according to claim 7, wherein the worm (34) is positioned on the frame (36) to engage the pinion (32) upon opening of the weaving arm (3). Machine de voilage selon une des revendications 1 à 8, comportant une butée (35) positionnée sur le bâti (36) de façon à actionner l'ouverture du dispositif de blocage (9b) de la bande abrasive (8) lors de l'ouverture du bras de toilage (3).Veiling machine according to one of claims 1 to 8, comprising an abutment (35) positioned on the frame (36) so as to actuate the opening of the locking device (9b) of the abrasive belt (8) during the opening the arm of the machine (3). Machine de toilage selon une des revendications 1 à 9, selon laquelle le dispositif de support (14) de la bobine (7) comprend deux plaques flexibles (29) assurant le positionnement vertical de ladite bobine (7) ainsi que le maintien en tension de la bande abrasive (8).A machine according to one of claims 1 to 9, wherein the support device (14) of the coil (7) comprises two flexible plates (29) ensuring the vertical positioning of said coil (7) and the maintenance voltage of the abrasive belt (8).
EP10306241A 2009-11-24 2010-11-10 Finishing machine Withdrawn EP2324955A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015124205A1 (en) * 2014-02-21 2015-08-27 Supfina Grieshaber Gmbh & Co. Kg Band finishing apparatus and method for controlling the movement of a finishing band
DE102016111155A1 (en) * 2016-06-17 2017-12-21 Supfina Grieshaber Gmbh & Co. Kg Finishing belt clamping device and finishing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366506A1 (en) 1988-09-27 1990-05-02 Societe Des Procedes Machines Speciales Device for abrasive machining of cylindrical bearing surfaces of workpieces, in particular for belt grinding of crankshaft journals and pins
DE4419366A1 (en) * 1994-06-03 1995-12-07 Otmar Fahrion Finishing machine
US5755615A (en) * 1995-11-13 1998-05-26 Toyota Jidosha Kabushiki Kaisha Lapping apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366506A1 (en) 1988-09-27 1990-05-02 Societe Des Procedes Machines Speciales Device for abrasive machining of cylindrical bearing surfaces of workpieces, in particular for belt grinding of crankshaft journals and pins
DE4419366A1 (en) * 1994-06-03 1995-12-07 Otmar Fahrion Finishing machine
US5755615A (en) * 1995-11-13 1998-05-26 Toyota Jidosha Kabushiki Kaisha Lapping apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015124205A1 (en) * 2014-02-21 2015-08-27 Supfina Grieshaber Gmbh & Co. Kg Band finishing apparatus and method for controlling the movement of a finishing band
DE102016111155A1 (en) * 2016-06-17 2017-12-21 Supfina Grieshaber Gmbh & Co. Kg Finishing belt clamping device and finishing device
DE102016111155B4 (en) 2016-06-17 2024-02-29 Supfina Grieshaber Gmbh & Co. Kg Finish band clamping device and finishing device

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FR2952845A1 (en) 2011-05-27

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