EP0596179A1 - One-engined driven device for a diamant holder with angular and longitudinal movement - Google Patents

One-engined driven device for a diamant holder with angular and longitudinal movement Download PDF

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Publication number
EP0596179A1
EP0596179A1 EP92811021A EP92811021A EP0596179A1 EP 0596179 A1 EP0596179 A1 EP 0596179A1 EP 92811021 A EP92811021 A EP 92811021A EP 92811021 A EP92811021 A EP 92811021A EP 0596179 A1 EP0596179 A1 EP 0596179A1
Authority
EP
European Patent Office
Prior art keywords
clutch
shaft
correction
drive device
main shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92811021A
Other languages
German (de)
French (fr)
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EP0596179B1 (en
Inventor
Maurice Guenin
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.)
Voumard Machines Co SA
Original Assignee
Voumard Machines Co SA
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 Voumard Machines Co SA filed Critical Voumard Machines Co SA
Priority to EP92811021A priority Critical patent/EP0596179B1/en
Priority to DE69200165T priority patent/DE69200165T2/en
Priority to ES92811021T priority patent/ES2056701T3/en
Priority to US08/166,825 priority patent/US5497759A/en
Priority to JP5344694A priority patent/JP2684329B2/en
Publication of EP0596179A1 publication Critical patent/EP0596179A1/en
Application granted granted Critical
Publication of EP0596179B1 publication Critical patent/EP0596179B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/08—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels controlled by information means, e.g. patterns, templets, punched tapes or the like

Definitions

  • the present invention relates to a single-motor drive device for a diamond holder with angular and longitudinal movement, used in particular on grinding machines.
  • this device is particularly advantageous for carrying out dressing operations on parts comprising concave and / or convex portions with or without a straight portion.
  • the high precision obtained thanks to the device allows tools to be drawn up for machining parts requiring a neat finish, such as high precision bearings.
  • Document EP-0 304 152 describes a multi-motor drive device for a diamond holder with angular and longitudinal movement.
  • the design of this device, with a drive using a first motor to carry out the angular displacements and a second motor to carry out the longitudinal displacements, is complex and bulky. Indeed, to transmit the two types of movement to the diamond holder, the mechanism described comprises many parts, thus very negatively affecting the cost of manufacturing the machine as well as its precision.
  • the object of the invention is to propose a single-engine device comprising in particular a clutch making it possible to couple or decouple a main shaft and a correction shaft, a cam / feeler assembly make it possible to transform the rotary movement of the correction shaft into movement longitudinal of the diamond holder so that when the correction shaft and the main shaft connected by the clutch rotate simultaneously, the diamond holder performs only an angular movement; when the two shafts are decoupled and only one of the two shafts rotates, the diamond holder performs either only a longitudinal movement, or both a longitudinal and angular movement.
  • This object is achieved by the device according to claims 1 to 14, which can be used for different types of grinding machine as mentioned in claim 15.
  • the device according to the invention allows the correction as well as the programming of the radius (longitudinal distance relative to the part) or of the angular movement from the machine control panel and thereby improves convenience and safety during adjustments, by limiting manual operations inside the protected operational enclosure of the grinding machine.
  • the gain of an engine makes it possible to reduce the dimensions of the device, which allows a more rational use of the workspace; the available longitudinal stroke increases the flexibility of use by allowing the machining of a very wide range of different parts; this also makes it possible to economically produce small series of parts with frequent set-up changes.
  • FIG. 5 This perspective view makes it possible to understand the functional role of the main elements of the device.
  • a motor 14 rotates a main axis 2 by means of a drive means 3. Means described later make it possible to couple a correction shaft 1 to the main shaft or to dissociate them while making one of the two trees (the one that remains fixed during the radius correction operation) secured to the frame.
  • a diamond holder 32 is arranged under the main shaft by means of an adapter 2a, on which the diamond holder can slide longitudinally. When the two shafts are coupled, the diamond holder is rotated by the main axis so that the diamond moves angularly along the contour of the workpiece. When the two shafts are decoupled, the diamond holder moves longitudinally so that the diamond moves away or approaches the workpiece. This gives great flexibility in moving the diamond, which makes it possible to carry out dressing operations. on virtually any shape of room.
  • FIGS. 1 to 4 are described below.
  • Figure 1 shows the main elements of a preferred embodiment of the device according to the invention.
  • An internal correction axis 1 is disposed centrally in a main hollow axis 2.
  • Bearings 7 ball, roller or another type maintain the axis 1 while allowing its rotation in the shaft 2.
  • the axis 1 is maintained by at least 2 bearings spaced apart from each other: a first bearing of the radial type arranged along the axis, and a second bearing, preferably of the axial-radial type, preferably arranged at the lower end of the shaft 1
  • a first bearing of the radial type arranged along the axis
  • a second bearing preferably of the axial-radial type, preferably arranged at the lower end of the shaft 1
  • the lower part of the axis 2 extends under the frame 10 and ends with an adapter 2a, fixed to the lower end of the shaft.
  • the adapter 2a makes it possible to connect the various mobile elements of the device to the shaft 2. The latter can therefore drive all of these elements in rotation with it.
  • the axis 2 then extends upwards over at least a portion of the length of the axis 1.
  • the axis 2 is fixed to the frame 10 of the device by means of at least two ball bearings 8, spaced apart rollers or the like, radial type.
  • the assembly of shafts 1 and 2 into each other by means of bearings allows either an independent rotation of the two shafts, or a simultaneous rotation of these.
  • the type of rotation depends on the coupling or the relative decoupling of the two shafts. This coupling is achieved by a clutch 20 described later.
  • the axis 2 is rotated by a drive means 3 of a known type. It may for example be a belt, a chain, or a series of gears, associated with an electric or hydraulic motor 14. Said belt therefore bypasses a narrow portion of the shaft 2, the contour of which is preferably adapted in a known manner, for example with borders, so that the belt remains well positioned during rotation.
  • a drive means 3 of a known type. It may for example be a belt, a chain, or a series of gears, associated with an electric or hydraulic motor 14. Said belt therefore bypasses a narrow portion of the shaft 2, the contour of which is preferably adapted in a known manner, for example with borders, so that the belt remains well positioned during rotation.
  • a clutch seal 2b is attached to the upper end of the main shaft.
  • Said seal is advantageously shaped like an inverted bell so that the end portion of this bell has a flat part, perpendicular to the axis of the shaft, serving as the driving clutch surface 6.
  • a disc 4, centered and fixed to the upper part of the correction axis 1, includes a clutch driving surface 5, formed on the lower peripheral surface of the same disc, so as to be concomitant with the driving driving surface 6.
  • the disc 4 is flexible, thanks to the presence of a thinned part extending around the central core.
  • the disc is arranged so that the driven clutch surface 5 bears on the drive clutch surface 6, exerting sufficient pressure to allow the drive of the correction shaft.
  • the flexibility of the disc allows the driven clutch surface to be raised, so that the two clutch surfaces are no longer in contact.
  • a spring means (not shown) linked on the one hand to the axis 1 and on the other hand to the clutch disc 4 exerts a force on the latter tending to pushing the disc 4 against the clutch driving surface 6.
  • the clutch driving surface 5 comes into contact with the clutch driving surface 6, thus connecting the two shafts.
  • the spring means allows the disc to be slightly raised so that the two clutch surfaces are no longer in contact.
  • the device comprises a clutch system 20 making it possible to separate said axes.
  • This system is also illustrated in FIG. 1. It comprises at least one pusher 22 actuated by means 21 of known type, such as for example hydraulic means (as shown in FIG. 1), electro-mechanical, or others.
  • the pushers 22 are arranged in guide bores placed symmetrically with respect to the axis of rotation of the device in the frame 10 of the machine so as to be able to slide up or down along a given stroke.
  • the pushers act on a clutch ring 23 connected to the rest of the device by a membrane 23a whose purpose is to make said ring radially integral with the frame 10 while being axially free.
  • the clutch ring 23 exerts no force on the disc 4, so that the clutch driving surface 5 of the latter presses on the clutch driving surface 6.
  • the two trees are then integral with one another.
  • the clutch system is activated to be in the raised position, the pusher 22 is raised and the clutch ring 23 comes into contact with the disc 4 and lifts it.
  • the two clutch surfaces 5 and 6 are then no longer in contact, thus separating the axes 1 and 2.
  • the correction shaft 1 is then fixed radially to the frame by its connection with the crown 23.
  • the diamond holder rotates and moves simultaneously longitudinally by the action of the cam 34 on the probe 31, as described later is lying.
  • the pusher 22 and the crown 23 are lowered either only by the action of the gravitational force, or by the action of a return spring (not shown), or also by the action hydraulic, electro-mechanical, or other means 21 mentioned above, driving the various elements down.
  • the device according to the invention also comprises an encoder, an element known in the art, with a rotary part 9, and a fixed part 11.
  • the rotary part generally in the form of a ring, is dimensioned so as to be able to fit on the main shaft 2, at an advantageous location along the axis, such as at the top of it, as shown in Figure 1.
  • the fixed part 11 is arranged in the immediate vicinity of the rotating part, at a given angular position.
  • the latter can slide longitudinally along said slider. This longitudinal movement is guided by a cam 34 / probe 31 system.
  • the cam 34 is arranged at the lower end of the correction shaft 1.
  • the probe 31, is arranged so as to press laterally against the edge of the cam . During the rotation of the latter, the probe moves longitudinally following the contour of the cam.
  • a spring means 35 pulls the probe towards the axis of rotation of the cam, thus holding the probe against the cam. In this way, the probe can move in both directions, approaching or moving away from the axis of rotation of the cam.
  • the diamond holder 32 is disposed under the slide 30.
  • the feeler 31 is connected to the diamond holder, which allows the transmission of the longitudinal movement to the diamond holder. The amplitude of the longitudinal displacement depends directly on the profile of the said cam and on the rotation of the latter relative to the probe 31.
  • a diamond 33 is fixed laterally at the base of the diamond holder 32 so as to be in the working axis, thus making it possible to carry out the dressing operation on the part 40.
  • the device according to the invention is completed by an angular position detector 12, disposed near the clutch disc 4.
  • This detector of known type, makes it possible to determine the angular position of the correction shaft relative to the main shaft during the homing step, thanks to the presence of at least one angular position reference 13 arranged on the periphery of the disc 4.
  • the operation of the device according to the invention is controlled by a control means, preferably by the digital control of the machine tool, as is often the case for the devices known to date.
  • the homing making it possible to determine the exact position of the diamond with respect to the workpiece, is carried out in a known manner, preferably under the control of the digital control, as for example in the manner demonstrated in European patent application EP 0512956A1.
  • Figure 4 illustrates the types of movements that the diamond holder can make using the device according to the invention.
  • the arrow A indicates an angular displacement around the radius or the surface to be dressed.
  • the arrow B indicates a longitudinal movement allowing the diamond to approach or move away from the workpiece.
  • this first embodiment of the device it is possible to execute either only an angular displacement, or a simultaneous angular and longitudinal displacement. Thanks to its various combinations of movements, it is possible to carry out dressing operations by following a multitude of shapes, including straight edges, with constant or variable radius or combinations of these shapes.
  • the two axes are coupled.
  • the main axis 2 is driven by the drive means and rotates at a given speed, carrying with it the correction axis 1.
  • the two axes thus have an identical angular speed and there is therefore no relative movement between the two.
  • the diamond holder 32 therefore follows the main shaft in its angular movement.
  • the two axes are independent.
  • the main axis 2 is driven by the drive means and rotates at a given speed, while the correction shaft 1 is held in a fixed position by the clutch crown 23.
  • the correction cam 34 which rotates relative to the probe 31, acts on the latter by pushing it laterally along its contour.
  • the transmission of the movement by the cam is well shown in FIG. 1A.
  • the probe linked to the diamond holder, guides the longitudinal movement of the latter. Since the main axis is also rotating, a simultaneous longitudinal displacement and a longitudinal displacement are thus obtained. For this reason, in order to ensure maximum safety, it is preferable to move the wheel back during a large longitudinal movement.
  • the 9/11 encoder transmits absolute or incremental electrical signals to the machine control allowing it to know at all times the angular position of the main shaft. By memorization, the control can also know the angular position of the correction shaft, allowing it to determine the angular and longitudinal positions of the diamond holder.
  • these positions can be determined more easily using an angular position detector 12, and at least one positioning reference 13: the detector 12 transmits a signal to the control means, corresponding to the angular position of the 'correction tree.
  • the control means can at any time determine the position of the correction shaft relative to the main shaft. The position of the probe on the cam is thus known, which makes it possible to directly obtain the longitudinal position of the diamond holder 32 and the diamond 33.
  • the clutch 20 is disposed above the clutch disc 4 and comprises at least one electromagnet 24, but preferably several, these being distributed angularly at above the disc 4.
  • the electromagnets are controlled by the control means so as either to raise or lower the disc 4, using an electro-magnetic force of attraction, or repulsion, according to the case.
  • said disc 4 is raised, so as to release the driven clutch surface. In addition, the holding force prevents any angular movement of the disc 4, so that the correction shaft does not rotate. This gives the situation where the angular displacement and the longitudinal displacement occur simultaneously.
  • said disc 4 is placed in the lowered position, bearing on the drive clutch surface 6, so that the correction shaft 1 rotates with the main shaft 2 and the disc 4. This gives the situation where only angular displacement occurs.
  • the electromagnets can also act against the force (rigidity) of the disc 4. In this case, the shafts are coupled when the electromagnets are not energized and vice versa.
  • FIG. 3 represents a second embodiment of the device according to the invention.
  • the elements of this embodiment which are of the same nature and play the same role as the corresponding elements of Figures 1 and 2, are designated by the same reference signs, with the addition of the prime symbol (' ).
  • the main difference from the previous embodiment is in the drive of the shafts. Indeed, the drive means 3 ', rather than being connected to the main shaft, is connected to the correction shaft 1'.
  • the drive means is of a known type, such as for example a belt (FIG. 3), a chain, a series of gears, etc., associated with an electric or hydraulic motor.
  • the lower part of the axis 2 ' extends under the frame 10' and ends with an adapter 2a ', fixed to the lower end of the shaft.
  • the adapter 2a ' makes it possible to connect the various mobile elements of the device to the shaft 2'. The latter can therefore cause all these elements to rotate with it. It then extends upwards over at least a portion of the length of the axis 1 'and advantageously ends at a level substantially equal to the upper part of the electromagnet 24'.
  • the clutch disc 4 ' is arranged and centered on the upper end of the main axis 2'.
  • a flexible type disc is preferably used, as described above.
  • An adapter 1 a ' is fixed on the correction shaft.
  • This adapter actually forms an enlarged portion of the shaft 1 ', of diameter substantially equal to that of the disc 4'. It is under this adapter that the driving clutch surface 6 'is located. This surface is conformed to the lower peripheral surface of the adapter, so as to be concomitant with the clutch surface driven 5 '.
  • the fact that the correction shaft is the drive shaft has the consequence that the drive clutch surfaces 6 ′ and line 5 ′ are reversed with respect to the surfaces 5 and 6 of the embodiment where the main shaft is the drive shaft.
  • the 9 ′ / 11 ′ encoder used is preferably placed at the end of the correction shaft, as shown in FIG. 3. It transmits a signal to the control means enabling the latter to know at all times the angular position of the correction shaft. Given the independence of the angular and longitudinal movements, information is obtained in this case allowing the control means to directly determine the longitudinal and angular position of the diamond holder and the diamond.
  • the location of the clutch 20 ' also differs.
  • a clutch of electromagnetic type is preferably used, comprising one or more electromagnets 24 ′. These electromagnets are preferably arranged under the clutch disc 4 ′, and act either to raise or lower the disc 4 ′, using an electro-magnetic attraction force, or repulsion, as the case may be.
  • this second embodiment of the device it is possible to execute independently, either only an angular displacement, or only a longitudinal displacement.
  • By judiciously linking these two types of movement it is possible to carry out dressing operations by following a multitude of shapes, including straight edges, with constant or variable radius or combinations of these shapes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Mechanical Operated Clutches (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Manipulator (AREA)

Abstract

Single-motor drive device for a diamond holder (32; 32') particularly comprising a motor (14) which rotationally drives a main shaft (2; 2') and a correction shaft (1; 1'), the said main shaft itself rotationally driving the said diamond holder (32; 32'), a clutch (20; 20') which makes it possible to couple or uncouple the shafts, a cam/feeler assembly (34, 31; 34', 31') making it possible to convert the rotational movement of the correction shaft into a longitudinal movement of the diamond holder so that when the correction shaft and the main shaft connected by the clutch rotate simultaneously the diamond holder executes solely an angular movement; when the two shafts are uncoupled and only one of the two shafts rotates, the diamond holder executes either just a longitudinal displacement or both a longitudinal and an angular displacement. <IMAGE>

Description

La présente invention concerne un dispositif d'entraînement monomoteur pour porte-diamant avec mouvement angulaire et longitudinal, utilisé notamment sur des rectifieuses.The present invention relates to a single-motor drive device for a diamond holder with angular and longitudinal movement, used in particular on grinding machines.

Lié à un dispositif de contrôle adapté, comme par exemple à la commande numérique de la rectifieuse, ce dispositif est particulièrement avantageux pour réaliser des opérations de dressage sur des pièces comportant des portions concaves et/ou convexes avec ou sans portion rectiligne. La grande précision obtenue grâce au dispositif permet de dresser des outils devant usiner des pièces nécessitant un fini soigné, comme par exemple des roulements de haute précision.Linked to a suitable control device, such as for example the digital control of the grinding machine, this device is particularly advantageous for carrying out dressing operations on parts comprising concave and / or convex portions with or without a straight portion. The high precision obtained thanks to the device allows tools to be drawn up for machining parts requiring a neat finish, such as high precision bearings.

Le document EP-0 304 152 décrit un dispositif d'entraînement multi-moteurs pour porte-diamant avec mouvement angulaire et longitudinal. La conception de ce dispositif, avec un entraînement utilisant un premier moteur pour réaliser les déplacements angulaires et un second moteur pour réaliser les déplacements longitudinaux, est complexe et encombrante. En effet, pour transmettre les deux types de mouvement au porte-diamant, le mécanisme décrit comprend de nombreuses pièces, affectant ainsi très négativement le coût de fabrication de la machine ainsi que sa précision.Document EP-0 304 152 describes a multi-motor drive device for a diamond holder with angular and longitudinal movement. The design of this device, with a drive using a first motor to carry out the angular displacements and a second motor to carry out the longitudinal displacements, is complex and bulky. Indeed, to transmit the two types of movement to the diamond holder, the mechanism described comprises many parts, thus very negatively affecting the cost of manufacturing the machine as well as its precision.

C'est donc dans le but de simplifier la construction et le fonctionnement du dispositif que la présente invention est avantageuse.It is therefore with the aim of simplifying the construction and operation of the device that the present invention is advantageous.

Le but de l'invention est de proposer un dispositif monomoteur comprenant notamment un embrayage permettant de coupler ou de découpler un arbre principal et un arbre de correction, un ensemble came/palpeur permettent de transformer le mouvement rotatif de l'arbre de correction en mouvement longitudinal du porte-diamant de sorte que lorsque l'arbre de correction et l'arbre principal reliés par l'embrayage tournent simultanément, le porte-diamant exécute uniquement un mouvement angulaire; lorsque les deux arbres sont découplés et que seul un des deux arbres tourne, le porte-diamant exécute soit uniquement un déplacement longitudinal, ou à la fois un déplacement longitudinal et angulaire. Ce but est atteint grâce au dispositif selon les revendications 1 à 14, pouvant être utilisé pour différents types de rectifieuse comme mentionné à la revendication 15.The object of the invention is to propose a single-engine device comprising in particular a clutch making it possible to couple or decouple a main shaft and a correction shaft, a cam / feeler assembly make it possible to transform the rotary movement of the correction shaft into movement longitudinal of the diamond holder so that when the correction shaft and the main shaft connected by the clutch rotate simultaneously, the diamond holder performs only an angular movement; when the two shafts are decoupled and only one of the two shafts rotates, the diamond holder performs either only a longitudinal movement, or both a longitudinal and angular movement. This object is achieved by the device according to claims 1 to 14, which can be used for different types of grinding machine as mentioned in claim 15.

Grâce au dispositif selon l'invention, on obtient de nombreux avantages. Tout d'abord, le fait d'utiliser un seul moteur tout en permettant de réaliser quand-même le déplacement angulaire et longitudinal du porte-diamant, permet de diminuer le coût de reviens du dispositif de façon considérable. D'autre part, par rapport à certains dispositif de l'art antérieur ne permettant pas de réaliser le mouvement longitudinal, le présent dispositif permet la correction ainsi que la programmation du rayon (distance longitudinale par rapport à la pièce) ou du mouvement angulaire à partir du tableau de commande de la machine et par le fait même améliore la commodité et la sécurité lors des réglages, en limitant les opérations manuelles à l'intérieur de l'enceinte opérationnelle protégée de la rectifieuse. Le gain d'un moteur permet de diminuer les dimensions du dispositif, ce qui permet une utilisation plus rationnelle de l'espace de travail; la course longitudinale disponible augmente la souplesse d'utilisation en permettant l'usinage d'une très vaste gamme de pièces différentes; cela permet également de réaliser d'une manière économique de petites séries de pièces avec des changements de set-up fréquents.Thanks to the device according to the invention, numerous advantages are obtained. First of all, the fact of using a single motor while still allowing the angular and longitudinal displacement of the diamond holder, makes it possible to considerably reduce the cost of returns from the device. On the other hand, compared to certain devices of the prior art not making it possible to carry out the longitudinal movement, the present device allows the correction as well as the programming of the radius (longitudinal distance relative to the part) or of the angular movement from the machine control panel and thereby improves convenience and safety during adjustments, by limiting manual operations inside the protected operational enclosure of the grinding machine. The gain of an engine makes it possible to reduce the dimensions of the device, which allows a more rational use of the workspace; the available longitudinal stroke increases the flexibility of use by allowing the machining of a very wide range of different parts; this also makes it possible to economically produce small series of parts with frequent set-up changes.

L'invention est exposée ci-après de façon plus détaillée, à l'aide du dessin annexé comprenant les figures suivantes:

  • la figure 1 représente une vue de coupe d'une forme d'exécution préférentielle du dispositif selon l'invention;
  • la figure 1A est une vue partielle selon la coupe I-I de la figure 1, montrant l'ensemble camepalpeur;
  • la figure 2 représente une vue similaire d'une variante d'éxécution pourvue d'un embrayage de type électro-magnétique;
  • la figure 3 représente une vue de coupe d'une deuxième forme d'exécution du dispositif selon l'invention;
  • la figure 4 représente schématiquement le déplacement angulaire du diamant le long de la surface à dresser;
  • la figure 5 représente une vue partielle en perspective du dispositif selon l'invention utilisé pour dresser une pièce.
The invention is set out below in more detail, using the attached drawing comprising the following figures:
  • Figure 1 shows a sectional view of a preferred embodiment of the device according to the invention;
  • Figure 1A is a partial view along section II of Figure 1, showing the cam assembly;
  • 2 shows a similar view of an alternative embodiment provided with an electromagnetic type clutch;
  • Figure 3 shows a sectional view of a second embodiment of the device according to the invention;
  • FIG. 4 schematically represents the angular displacement of the diamond along the surface to be dressed;
  • FIG. 5 represents a partial perspective view of the device according to the invention used for dressing a part.

Le dispositif selon l'invention est montré d'une manière générale à la figure 5. Cette vue en perspective permet de bien comprendre le rôle fonctionnel des principaux éléments du dispositif. Un moteur 14 entraîne en rotation un axe principal 2 par l'entremise d'un moyen d'entraînement 3. Des moyens décrits ultérieurement permettent de coupler un arbre de correction 1 à l'arbre principal ou de les dissocier tout en rendant un des deux arbres (celui qui reste fixe pendant l'opération de correction du rayon) solidaire du bâti. Un porte-diamant 32 est disposé sous l'arbre principal par l'entremise d'un adapteur 2a, sur lequel le porte-diamant peut coulisser longitudinalement. Lorsque les deux arbres sont couplés, le porte-diamant est entraîné en rotation par l'axe principal afin que le diamant se déplace angulairement le long du contour de la pièce à dresser. Lorsque les deux arbres sont découplés, le porte-diamant se déplace longitudinalement afin que le diamant s'éloigne ou se rapproche de la pièce. On obtient ainsi une grande flexibilité de déplacement du diamant, ce qui permet de réaliser des opérations de dressage sur pratiquement toute forme de pièce.The device according to the invention is generally shown in FIG. 5. This perspective view makes it possible to understand the functional role of the main elements of the device. A motor 14 rotates a main axis 2 by means of a drive means 3. Means described later make it possible to couple a correction shaft 1 to the main shaft or to dissociate them while making one of the two trees (the one that remains fixed during the radius correction operation) secured to the frame. A diamond holder 32 is arranged under the main shaft by means of an adapter 2a, on which the diamond holder can slide longitudinally. When the two shafts are coupled, the diamond holder is rotated by the main axis so that the diamond moves angularly along the contour of the workpiece. When the two shafts are decoupled, the diamond holder moves longitudinally so that the diamond moves away or approaches the workpiece. This gives great flexibility in moving the diamond, which makes it possible to carry out dressing operations. on virtually any shape of room.

Afin de mieux comprendre la construction du dispositif ainsi que son fonctionnement, les vues détaillées des figures 1 à 4 sont décrites ci-après.In order to better understand the construction of the device as well as its operation, the detailed views of FIGS. 1 to 4 are described below.

La figure 1 montre les principaux éléments d'une forme d'exécution préférentielle du dispositif selon l'invention. Un axe de correction 1 interne est disposé centralement dans un axe principal 2 creux. Des roulements 7 à billes, à rouleaux ou d'un autre type maintiennent l'axe 1 tout en permettant sa rotation dans l'arbre 2. Pour un meilleur équilibrage et pour plus de précision, l'axe 1 est maintenu par au moins 2 roulements espacés l'un de l'autre: un premier roulement de type radial disposé le long de l'axe, et un deuxième roulement, de manière préférentielle de type axial-radial disposé de préférence à l'extrémité inférieure de l'arbre 1. Une telle disposition procure un maintien radial et axial optimum, tout en agissant contre la force gravitationnelle. La partie inférieure de l'axe 2 se prolonge sous le bâti 10 et se termine par un adapteur 2a, fixé à l'extrémité inférieure de l'arbre. L'adapteur 2a permet de relier les différents éléments mobiles du dispositif à l'arbre 2. Ce dernier peut donc entraîner tous ces éléments en rotation avec lui. L'axe 2 se prolonge ensuite vers le haut sur au moins une portion de la longueur de l'axe 1. L'axe 2 est fixé au bâti 10 du dispositif par l'entremise d'au moins deux roulements 8 à billes, à rouleaux ou autres, espacés, de type radial. L'assemblage des arbres 1 et 2 l'un dans l'autre par l'entremise de roulements permet soit une rotation indépendante des deux arbres, soit une rotation simultanée de ceux-ci. Le type de rotation dépend du couplage ou du découplage relatif des deux arbres. Ce couplage est réalisé par un embrayage 20 décrit ultérieurement.Figure 1 shows the main elements of a preferred embodiment of the device according to the invention. An internal correction axis 1 is disposed centrally in a main hollow axis 2. Bearings 7 ball, roller or another type maintain the axis 1 while allowing its rotation in the shaft 2. For better balancing and for more precision, the axis 1 is maintained by at least 2 bearings spaced apart from each other: a first bearing of the radial type arranged along the axis, and a second bearing, preferably of the axial-radial type, preferably arranged at the lower end of the shaft 1 Such an arrangement provides optimum radial and axial support, while acting against the gravitational force. The lower part of the axis 2 extends under the frame 10 and ends with an adapter 2a, fixed to the lower end of the shaft. The adapter 2a makes it possible to connect the various mobile elements of the device to the shaft 2. The latter can therefore drive all of these elements in rotation with it. The axis 2 then extends upwards over at least a portion of the length of the axis 1. The axis 2 is fixed to the frame 10 of the device by means of at least two ball bearings 8, spaced apart rollers or the like, radial type. The assembly of shafts 1 and 2 into each other by means of bearings allows either an independent rotation of the two shafts, or a simultaneous rotation of these. The type of rotation depends on the coupling or the relative decoupling of the two shafts. This coupling is achieved by a clutch 20 described later.

L'axe 2 est entraîné en rotation par un moyen d'entraînement 3 d'un type connu. Il peut s'agir par exemple d'une courroie, d'une chaîne, ou d'une série d'engrenages, associée à un moteur 14 électrique ou hydraulique. La dite courroie contourne donc une étroite portion de l'arbre 2 dont le contour est de préférence adapté d'une manière connue, comme par exemple avec des bordures, de façon à ce que la courroie demeure bien positionnée lors de la rotation.The axis 2 is rotated by a drive means 3 of a known type. It may for example be a belt, a chain, or a series of gears, associated with an electric or hydraulic motor 14. Said belt therefore bypasses a narrow portion of the shaft 2, the contour of which is preferably adapted in a known manner, for example with borders, so that the belt remains well positioned during rotation.

Un joint d'embrayage 2b est fixé à l'extrémité supérieure de l'arbre principal. Le dit joint est avantageusement conformé en forme de cloche renversée de façon à ce que la portion terminale de cette cloche présente une partie plane, perpendiculaire à l'axe de l'arbre, servant de surface d'embrayage motrice 6. Un disque 4, centré et fixé à la partie supérieure de l'axe de correction 1, comprend une surface conduite d'embrayage 5, formée à la surface périphérique inférieure du même disque, de façon à être concomitante à la surface motrice d'embrayage 6. Le disque 4 est flexible, grâce à la présence d'une partie amincie s'étendant autour du noyau central. Le disque est disposé de sorte que la surface d'embrayage conduite 5 appui sur la surface d'embrayage motrice 6, en exerçant une pression suffisante pour permettre l'entraînement de l'arbre de correction. Toutefois, la flexibilité du disque permet que la surface d'embrayage conduite puisse être soulevée, afin que les deux surfaces d'embrayage ne soient plus en contact.A clutch seal 2b is attached to the upper end of the main shaft. Said seal is advantageously shaped like an inverted bell so that the end portion of this bell has a flat part, perpendicular to the axis of the shaft, serving as the driving clutch surface 6. A disc 4, centered and fixed to the upper part of the correction axis 1, includes a clutch driving surface 5, formed on the lower peripheral surface of the same disc, so as to be concomitant with the driving driving surface 6. The disc 4 is flexible, thanks to the presence of a thinned part extending around the central core. The disc is arranged so that the driven clutch surface 5 bears on the drive clutch surface 6, exerting sufficient pressure to allow the drive of the correction shaft. However, the flexibility of the disc allows the driven clutch surface to be raised, so that the two clutch surfaces are no longer in contact.

Selon une variante d'exécution utilisant un disque 4 non flexible, un moyen de ressort (non montré) lié d'une part à l'axe 1 et d'autre part au disque d'embrayage 4 exerce une force sur ce dernier tendant à pousser le disque 4 contre la surface motrice d'embrayage 6. De cette façon, la surface conduite d'embrayage 5 entre en contact avec la surface motrice d'embrayage 6, liant ainsi les deux arbres. De plus, le moyen de ressort permet que le disque soit légèrement soulevé afin que les deux surfaces d'embrayage ne soient plus en contact.According to an alternative embodiment using a non-flexible disc 4, a spring means (not shown) linked on the one hand to the axis 1 and on the other hand to the clutch disc 4 exerts a force on the latter tending to pushing the disc 4 against the clutch driving surface 6. In this way, the clutch driving surface 5 comes into contact with the clutch driving surface 6, thus connecting the two shafts. In addition, the spring means allows the disc to be slightly raised so that the two clutch surfaces are no longer in contact.

Etant donné que le mouvement simultané des deux axes 1 et 2 n'est pas toujours souhaité (pour des motifs expliqués ultérieurement), le dispositif comporte un système d'embrayage 20 permettant de désolidariser les dits axes. Ce système est également illustré à la figure 1. Il comprend au moins un poussoir 22 actionné par des moyens 21 de type connu, comme par exemple des moyens hydrauliques (tel que montré à la figure 1), électro-mécaniques, ou autres. Les poussoirs 22 sont disposés dans des alésages de guidage placés symétriquement par rapport à l'axe de rotation du dispositif dans le bâti 10 de la machine de façon à pouvoir coulisser vers le haut ou vers le bas le long d'une course donnée. Les poussoirs agissent sur une couronne d'embrayage 23 liée au reste du dispositif par une membrane 23a ayant pour but de rendre ladite couronne radialement solidaire du bâti 10 tout en étant libre axialement. Lorsque le système d'embrayage est en position basse, la couronne d'embrayage 23 n'exerce aucune force sur le disque 4, de sorte que la surface conduite d'embrayage 5 de ce dernier appuie sur la surface motrice d'embrayage 6. Les deux arbres sont alors solidaires l'un de l'autre. Lorsque le système d'embrayage est activé pour être en position relevé, le poussoir 22 est soulevé et la couronne d'embrayage 23 entre en contact avec le disque 4 et le soulève. Les deux surfaces d'embrayage 5 et 6 ne sont alors plus en contact, désolidarisant ainsi les axes 1 et 2. L'arbre de correction 1 est alors fixé radialement au bâti par sa liaison avec la couronne 23. En faisant tourner l'arbre 2 au moyen du moteur, le porte diamant tourne et se déplace simultanément longitudinalement grâce à l'action de la came 34 sur le palpeur 31, tel que décrit ultérieurement. Pour un retour en position basse, le poussoir 22 et la couronne 23 s'abaissent soit uniquement par l'action de la force gravitationnelle, soit par l'action d'un ressort de retour (non montré), ou encore par l'action des moyens 21 hydrauliques, électro-mécaniques, ou autres cités ci-haut, entraînant les différents éléments vers le bas.Since the simultaneous movement of the two axes 1 and 2 is not always desired (for reasons explained later), the device comprises a clutch system 20 making it possible to separate said axes. This system is also illustrated in FIG. 1. It comprises at least one pusher 22 actuated by means 21 of known type, such as for example hydraulic means (as shown in FIG. 1), electro-mechanical, or others. The pushers 22 are arranged in guide bores placed symmetrically with respect to the axis of rotation of the device in the frame 10 of the machine so as to be able to slide up or down along a given stroke. The pushers act on a clutch ring 23 connected to the rest of the device by a membrane 23a whose purpose is to make said ring radially integral with the frame 10 while being axially free. When the clutch system is in the low position, the clutch ring 23 exerts no force on the disc 4, so that the clutch driving surface 5 of the latter presses on the clutch driving surface 6. The two trees are then integral with one another. When the clutch system is activated to be in the raised position, the pusher 22 is raised and the clutch ring 23 comes into contact with the disc 4 and lifts it. The two clutch surfaces 5 and 6 are then no longer in contact, thus separating the axes 1 and 2. The correction shaft 1 is then fixed radially to the frame by its connection with the crown 23. By rotating the shaft 2 by means of the motor, the diamond holder rotates and moves simultaneously longitudinally by the action of the cam 34 on the probe 31, as described later is lying. For a return to the low position, the pusher 22 and the crown 23 are lowered either only by the action of the gravitational force, or by the action of a return spring (not shown), or also by the action hydraulic, electro-mechanical, or other means 21 mentioned above, driving the various elements down.

Le dispositif selon l'invention comprend également un codeur, élément connu de la technique, avec une partie rotative 9, et une partie fixe 11. La partie rotative, se présentant généralement sous la forme d'un anneau, est dimensionnée de façon à pouvoir s'ajuster sur l'arbre principal 2, à un endroit avantageux le long de l'axe, comme par exemple à la partie supérieure de celui-ci, tel que montré à la figure 1. La partie fixe 11 est disposée à proximité immédiate de la partie rotative, à une position angulaire donnée.The device according to the invention also comprises an encoder, an element known in the art, with a rotary part 9, and a fixed part 11. The rotary part, generally in the form of a ring, is dimensioned so as to be able to fit on the main shaft 2, at an advantageous location along the axis, such as at the top of it, as shown in Figure 1. The fixed part 11 is arranged in the immediate vicinity of the rotating part, at a given angular position.

Un coulisseau de correction 30, fixé sous l'adapteur 2a, supporte un porte-diamant 32. Ce dernier peut coulisser longitudinalement le long du dit coulisseau. Ce déplacement longitudinal est guidé par un système came 34/palpeur 31. La came 34, est disposée à l'extrémité inférieure de l'arbre de correction 1. Le palpeur 31, est disposé de façon à appuyer latéralement contre le bord de la came. Lors de la rotation de cette dernière, le palpeur se déplace longitudinalement en suivant le contour de la came. Un moyen de ressort 35 tire le palpeur vers l'axe de rotation de la came, maintenant ainsi le palpeur contre la came. De cette façon, le palpeur peut se déplacer dans les deux sens, se rapprochant ou s'éloignant de l'axe de rotation de la came. Le porte-diamant 32 est disposé sous le coulisseau 30. Le palpeur 31 est relié au porte-diamant, ce qui permet la transmission du mouvement longitudinal au porte-diamant. L'amplitude du déplacement longitudinal dépend directement du profil de la dite came et de la rotation de celle-ci par rapport au palpeur 31.A correction slider 30, fixed under the adapter 2a, supports a diamond holder 32. The latter can slide longitudinally along said slider. This longitudinal movement is guided by a cam 34 / probe 31 system. The cam 34, is arranged at the lower end of the correction shaft 1. The probe 31, is arranged so as to press laterally against the edge of the cam . During the rotation of the latter, the probe moves longitudinally following the contour of the cam. A spring means 35 pulls the probe towards the axis of rotation of the cam, thus holding the probe against the cam. In this way, the probe can move in both directions, approaching or moving away from the axis of rotation of the cam. The diamond holder 32 is disposed under the slide 30. The feeler 31 is connected to the diamond holder, which allows the transmission of the longitudinal movement to the diamond holder. The amplitude of the longitudinal displacement depends directly on the profile of the said cam and on the rotation of the latter relative to the probe 31.

Un diamant 33 est fixé latéralement à la base du porte diamant 32 de façon à se trouver dans l'axe de travail, permettant ainsi de réaliser l'opération de dressage sur la pièce 40.A diamond 33 is fixed laterally at the base of the diamond holder 32 so as to be in the working axis, thus making it possible to carry out the dressing operation on the part 40.

Le dispositif selon l'invention est complété par un détecteur de position angulaire 12, disposé à proximité du disque d'embrayage 4. Ce détecteur, de type connu, permet de déterminer la position angulaire de l'arbre de correction par rapport à l'arbre principal lors de l'étape de la prise d'origine, grâce à la présence d'au moins une référence de position angulaire 13 disposées à la périphérie du disque 4.The device according to the invention is completed by an angular position detector 12, disposed near the clutch disc 4. This detector, of known type, makes it possible to determine the angular position of the correction shaft relative to the main shaft during the homing step, thanks to the presence of at least one angular position reference 13 arranged on the periphery of the disc 4.

Le fonctionnement du dispositif selon l'invention est contrôlé par un moyen de contrôle, de manière préférentielle par la commande numérique de la machine-outil, comme cela est souvent le cas pour les dispositifs connus jusqu'à ce jour.The operation of the device according to the invention is controlled by a control means, preferably by the digital control of the machine tool, as is often the case for the devices known to date.

La prise d'origine, permettant de déterminer la position exacte du diamant par rapport à la pièce à dresser, s'effectue d'une façon connue, de manière préférentielle sous le contrôle de la commande numérique, comme par exemple de la façon démontrée dans la demande de brevet européen EP 0512956A1.The homing, making it possible to determine the exact position of the diamond with respect to the workpiece, is carried out in a known manner, preferably under the control of the digital control, as for example in the manner demonstrated in European patent application EP 0512956A1.

La figure 4 illustre les types de déplacements que le porte-diamant peut réaliser à l'aide du dispositif selon l'invention. La flèche A indique un déplacement angulaire autour du rayon ou de la surface à dresser. La flèche B indique un déplacement longitudinal permettant au diamant de se rapprocher ou de s'éloigner de la pièce à dresser.Figure 4 illustrates the types of movements that the diamond holder can make using the device according to the invention. The arrow A indicates an angular displacement around the radius or the surface to be dressed. The arrow B indicates a longitudinal movement allowing the diamond to approach or move away from the workpiece.

Selon cette première forme d'exécution du dispositif, il est possible d'éxécuter soit uniquement un déplacement angulaire, soit un déplacement angulaire et longitudinal simultanés. Grâce à ses diverses combinaisons de mouvements, il est possible de réaliser des opérations de dressage en suivant une multitude de formes, comprenant des arêtes droites, à rayon constant ou variable ou des combinaisons de ces formes.According to this first embodiment of the device, it is possible to execute either only an angular displacement, or a simultaneous angular and longitudinal displacement. Thanks to its various combinations of movements, it is possible to carry out dressing operations by following a multitude of shapes, including straight edges, with constant or variable radius or combinations of these shapes.

Dans le premier cas, lorsque l'embrayage 20 est en position basse, les deux axes sont couplés. L'axe principal 2 est entraîné par les moyens d'entraînement et tourne à une vitesse donnée, entraînant avec lui l'axe de correction 1. Les deux axes ont ainsi une vitesse angulaire identique et il n'y a donc pas de mouvement relatif entre les deux. Le porte-diamant 32 suit donc l'arbre principal dans son mouvement angulaire.In the first case, when the clutch 20 is in the low position, the two axes are coupled. The main axis 2 is driven by the drive means and rotates at a given speed, carrying with it the correction axis 1. The two axes thus have an identical angular speed and there is therefore no relative movement between the two. The diamond holder 32 therefore follows the main shaft in its angular movement.

Dans le deuxième cas, lorsque l'embrayage 20 est en position relevée, les deux axes sont indépendants. L'axe principal 2 est entraîné par les moyens d'entraînement et tourne à une vitesse donnée, tandis que l'arbre de correction 1 est maintenu en position fixe par la couronne d'embrayage 23. Il y a donc, dans ce cas, un mouvement relatif entre les deux arbres. Grâce à ce mouvement angulaire relatif, la came de correction 34, qui tourne par rapport au palpeur 31, agit sur celui-ci en le poussant latéralement le long de son contour. La transmission du mouvement par la came est bien montrée à la figure 1A. Le palpeur, lié au porte-diamant, guide le déplacement longitudinal de celui-ci. Etant donné que l'axe principal est également en rotation, on obtient ainsi un déplacement longitudinal et un déplacement longitudinal simultanés. Pour cette raison, afin d'assurer un maximum de sécurité, il est préférable de reculer la meule lors d'un déplacement longitudinal important.In the second case, when the clutch 20 is in the raised position, the two axes are independent. The main axis 2 is driven by the drive means and rotates at a given speed, while the correction shaft 1 is held in a fixed position by the clutch crown 23. There is therefore, in this case, a relative movement between the two trees. Thanks to this relative angular movement, the correction cam 34, which rotates relative to the probe 31, acts on the latter by pushing it laterally along its contour. The transmission of the movement by the cam is well shown in FIG. 1A. The probe, linked to the diamond holder, guides the longitudinal movement of the latter. Since the main axis is also rotating, a simultaneous longitudinal displacement and a longitudinal displacement are thus obtained. For this reason, in order to ensure maximum safety, it is preferable to move the wheel back during a large longitudinal movement.

Le codeur 9/11 transmet des signaux électriques absolus ou incrémentaux au contrôle de la machine lui permettant de connaître en tout temps la position angulaire de l'arbre principal. Par mémorisation, le contrôle peut également connaître la position angulaire de l'arbre de correction, lui permettant de déterminer les positions angulaires et longitudinales du porte-diamant.The 9/11 encoder transmits absolute or incremental electrical signals to the machine control allowing it to know at all times the angular position of the main shaft. By memorization, the control can also know the angular position of the correction shaft, allowing it to determine the angular and longitudinal positions of the diamond holder.

Selon une variante d'exécution, ces positions peuvent être déterminées plus facilement grâce à un détecteur de position angulaire 12, et au moins un repère de positionnement 13: le détecteur 12 transmet au moyen de contrôle un signal, correspondant à la position angulaire de l'arbre de correction. A l'aide de l'information fournie par le codeur 9/11 et le détecteur de position angulaire 12, le moyen de contrôle peut déterminer en tout temps la position de l'arbre de correction par rapport à l'arbre principal. La position du palpeur sur la came est ainsi connue, ce qui permet d'obtenir directement la position longitudinale du porte-diamant 32 et du diamant 33.According to an alternative embodiment, these positions can be determined more easily using an angular position detector 12, and at least one positioning reference 13: the detector 12 transmits a signal to the control means, corresponding to the angular position of the 'correction tree. Using the information provided by the coder 9/11 and the angular position detector 12, the control means can at any time determine the position of the correction shaft relative to the main shaft. The position of the probe on the cam is thus known, which makes it possible to directly obtain the longitudinal position of the diamond holder 32 and the diamond 33.

Selon une variante d'éxécution illustrée à la figure 2, l'embrayage 20 est disposé au-dessus du disque d'embrayage 4 et comprend au moins un électro-aimant 24, mais de manière préférentielle plusieurs, ceux-ci étant répartis angulairement au-dessus du disque 4. Les électro-aimants sont commandés par le moyen de contrôle de façon soit à soulever, soit à abaisser le disque 4, à l'aide d'une force électro-magnétique d'attraction, ou de répulsion, selon le cas.According to an alternative embodiment illustrated in FIG. 2, the clutch 20 is disposed above the clutch disc 4 and comprises at least one electromagnet 24, but preferably several, these being distributed angularly at above the disc 4. The electromagnets are controlled by the control means so as either to raise or lower the disc 4, using an electro-magnetic force of attraction, or repulsion, according to the case.

Dans le premier cas, le dit disque 4 est soulevé, de façon à libérer la surface d'embrayage conduite. De plus, la force de maintien empêche tout mouvement angulaire du disque 4, de sorte que l'arbre de correction ne tourne pas. On obtient ainsi la situation où le déplacement angulaire et le déplacement longitudinal se produisent simultanément. Dans le deuxième cas, le dit disque 4 est placé en position abaissée, en appui sur la surface d'embrayage motrice 6, de sorte que l'arbre de correction 1 tourne avec l'arbre principal 2 et le disque 4. On obtient ainsi la situation où seul le déplacement angulaire se produit. Les électro-aimants peuvent également agir contre la force (rigidité) du disque 4. Dans ce cas, les arbres sont accouplés lorsque les électro-aimants ne sont pas sous tension et vice-versa.In the first case, said disc 4 is raised, so as to release the driven clutch surface. In addition, the holding force prevents any angular movement of the disc 4, so that the correction shaft does not rotate. This gives the situation where the angular displacement and the longitudinal displacement occur simultaneously. In the second case, said disc 4 is placed in the lowered position, bearing on the drive clutch surface 6, so that the correction shaft 1 rotates with the main shaft 2 and the disc 4. This gives the situation where only angular displacement occurs. The electromagnets can also act against the force (rigidity) of the disc 4. In this case, the shafts are coupled when the electromagnets are not energized and vice versa.

La figure 3 représente une deuxième forme d'exécution du dispositif selon l'invention. Dans cette figure, les éléments de cette forme d'exécution qui sont de même nature et jouent le même rôle que les éléments correspondants des figures 1 et 2, sont désignés par les même signes de référence, avec l'addition du symbole prime ('). La principale différence par rapport à la forme d'exécution précédente se situe au niveau de l'entraînement des arbres. En effet, le moyen d'entraînement 3', plutôt que d'être relié à l'arbre principal, est relié à l'arbre de correction 1'. Tout comme dans le cas précédent, le moyen d'entraînement est d'un type connu, comme par exemple une courroie (figure 3), une chaîne, une série d'engrenages, etc, associée à un moteur électrique ou hydraulique.FIG. 3 represents a second embodiment of the device according to the invention. In this figure, the elements of this embodiment which are of the same nature and play the same role as the corresponding elements of Figures 1 and 2, are designated by the same reference signs, with the addition of the prime symbol (' ). The main difference from the previous embodiment is in the drive of the shafts. Indeed, the drive means 3 ', rather than being connected to the main shaft, is connected to the correction shaft 1'. As in the previous case, the drive means is of a known type, such as for example a belt (FIG. 3), a chain, a series of gears, etc., associated with an electric or hydraulic motor.

La partie inférieure de l'axe 2' se prolonge sous le bâti 10' et se termine par un adapteur 2a', fixé à l'extrémité inférieure de l'arbre. L'adapteur 2a' permet de relier les différents éléments mobiles du dispositif à l'arbre 2'. Ce dernier peut donc entraîner tous ces éléments en rotation avec lui. Il se prolonge ensuite vers le haut sur au moins une portion de la longueur de l'axe 1' et se termine avantageusement à un niveau sensiblement égal à la partie supérieure de l'électro-aimant 24'. Le disque d'embrayage 4' est disposé et centré sur l'extrémité supérieure de l'axe principal 2'. On utilise de manière préférentielle un disque de type flexible, tel que décrit précédemment. Toutefois, selon une variante d'exécution (non montrée), il est possible d'utiliser un disque 4' non flexible. Dans ce cas, il est nécessaire d'utiliser une fixation à ressort de type connu, permettant au disque 4' d'effectuer un léger mouvement axial, de façon à permettre l'action d'embrayage et de débrayage des arbres.The lower part of the axis 2 'extends under the frame 10' and ends with an adapter 2a ', fixed to the lower end of the shaft. The adapter 2a 'makes it possible to connect the various mobile elements of the device to the shaft 2'. The latter can therefore cause all these elements to rotate with it. It then extends upwards over at least a portion of the length of the axis 1 'and advantageously ends at a level substantially equal to the upper part of the electromagnet 24'. The clutch disc 4 'is arranged and centered on the upper end of the main axis 2'. A flexible type disc is preferably used, as described above. However, according to an alternative embodiment (not shown), it is possible to use a non-flexible 4 'disc. In this case, it is necessary to use a spring fixing of known type, allowing the disc 4 'to perform a slight axial movement, so as to allow the action of clutching and disengaging the shafts.

Un adapteur 1 a' est fixé sur l'arbre de correction. Cet adapteur forme en fait une portion élargie de l'arbre 1', de diamètre sensiblement égal à celui du disque 4'. C'est sous cette adapteur que se situe la surface d'embrayage motrice 6'. Cette surface est conformée à la surface périphérique inférieure de l'adapteur, de façon à être concomitante à la surface d'embrayage conduite 5'. Le fait que l'arbre de correction soit l'arbre moteur a pour conséquence que les surfaces d'embrayage motrice 6' et conduite 5' sont inversées par rapport aux surfaces 5 et 6 de la forme d'exécution où l'arbre principal est l'arbre moteur.An adapter 1 a 'is fixed on the correction shaft. This adapter actually forms an enlarged portion of the shaft 1 ', of diameter substantially equal to that of the disc 4'. It is under this adapter that the driving clutch surface 6 'is located. This surface is conformed to the lower peripheral surface of the adapter, so as to be concomitant with the clutch surface driven 5 '. The fact that the correction shaft is the drive shaft has the consequence that the drive clutch surfaces 6 ′ and line 5 ′ are reversed with respect to the surfaces 5 and 6 of the embodiment where the main shaft is the drive shaft.

Le codeur 9'/11' utilisé est disposé de manière préférentielle à l'extrémité de l'arbre de correction, tel que montré à la figure 3. Il transmet au moyen de contrôle un signal permettant à ce dernier de connaître en tout temps la position angulaire de l'arbre de correction. Etant donné l'indépendance des mouvements angulaires et longitudinaux, on obtient dans ce cas une information permettant au moyen de contrôle de déterminer directement la position longitudinale et angulaire du porte-diamant et du diamant.The 9 ′ / 11 ′ encoder used is preferably placed at the end of the correction shaft, as shown in FIG. 3. It transmits a signal to the control means enabling the latter to know at all times the angular position of the correction shaft. Given the independence of the angular and longitudinal movements, information is obtained in this case allowing the control means to directly determine the longitudinal and angular position of the diamond holder and the diamond.

L'emplacement de l'embrayage 20' diffère également. Bien que l'on puisse dans ce cas utiliser différents types d'embrayage, comme par exemple hydraulique ou pneumatique, on utilise de préférence un embrayage de type électro-magnétique, comprenant un ou plusieurs électro-aimants 24'. Ces électro-aimants sont disposés de préférence sous le disque d'embrayage 4', et agissent de façon soit à soulever, soit à abaisser le disque 4', à l'aide d'une force électro-magnétique d'attraction, ou de répulsion, selon le cas.The location of the clutch 20 'also differs. Although it is possible in this case to use different types of clutch, such as hydraulic or pneumatic, a clutch of electromagnetic type is preferably used, comprising one or more electromagnets 24 ′. These electromagnets are preferably arranged under the clutch disc 4 ′, and act either to raise or lower the disc 4 ′, using an electro-magnetic attraction force, or repulsion, as the case may be.

Selon cette deuxième forme d'exécution du dispositif, il est possible d'éxécuter de façon indépendante, soit uniquement un déplacement angulaire, soit uniquement un déplacement longitudinal. En enchaînant judicieusement ces deux types de déplacement, il est possible de réaliser des opérations de dressage en suivant une multitude de formes, comprenant des arêtes droites, à rayon constant ou variable ou des combinaisons de ces formes.According to this second embodiment of the device, it is possible to execute independently, either only an angular displacement, or only a longitudinal displacement. By judiciously linking these two types of movement, it is possible to carry out dressing operations by following a multitude of shapes, including straight edges, with constant or variable radius or combinations of these shapes.

Dans le premier cas, lorsque l'embrayage 20' est en position relevée, les deux axes sont couplés. L'axe de correction 1' est entraîné par les moyens d'entraînement et tourne à une vitesse donnée, entraînant avec lui l'axe principal 2'. Les deux axes ont ainsi une vitesse angulaire identique et il n'y a donc pas de mouvement relatif entre les deux. Le porte-diamant 32' suit donc l'arbre principal dans son mouvement angulaire.In the first case, when the clutch 20 'is in the raised position, the two axes are coupled. The correction axis 1 'is driven by the drive means and rotates at a given speed, carrying with it the main axis 2'. The two axes thus have an identical angular speed and there is therefore no relative movement between the two. The diamond holder 32 'therefore follows the main shaft in its angular movement.

Dans le deuxième cas, lorsque l'embrayage 20' est en position basse, les deux axes sont indépendants. L'axe de correction 1' est entraîné par les moyens d'entraînement et tourne à une vitesse donnée, tandis que l'arbre principal 2' est maintenu en position fixe par la force de rétention de l'électro-aimant 24'. Il y a donc, dans ce cas, un mouvement relatif entre les deux arbres. Grâce à ce mouvement angulaire relatif, la came de correction 34', qui tourne par rapport au palpeur 31', agit sur celui-ci en le poussant latéralement le long de son contour. La transmission du mouvement par la came est bien montrée à la figure 1A. Le palpeur, lié au porte-diamant, guide le déplacement longitudinal de celui-ci. Etant donné que l'axe principal est fixe, on obtient ainsi uniquement un déplacement longitudinal.In the second case, when the clutch 20 'is in the low position, the two axes are independent. The correction axis 1 'is driven by the drive means and rotates at a given speed, while the main shaft 2' is held in a fixed position by the retention force of the electromagnet 24 '. There is therefore, in this case, a relative movement between the two trees. Thanks to this relative angular movement, the correction cam 34 ', which rotates relative to the probe 31', acts on the latter by pushing it laterally along its contour. The transmission of the movement by the cam is well shown in FIG. 1A. The probe, linked to the diamond holder, guides the longitudinal movement of the latter. Since the main axis is fixed, only a longitudinal displacement is thus obtained.

Claims (15)

1. Dispositif d'entraînement d'un porte-diamant dans lequel un porte-diamant (32; 32') peut se déplacer angulairement et/ou longitudinalement, caractérisé en ce qu'un moteur (14; 14') entraîne en rotation un arbre principal (2; 2') et un arbre de correction (1; 1') par l'entremise d'un moyen d'entraînement (3; 3'), le dit arbre principal entraînant lui-même en rotation le dit porte-diamant (32; 32'), et en ce que des moyens (30, 31, 32, 34, 35; 30', 31', 32', 34', 35') permettent de transformer le mouvement rotatif de l'arbre de correction par rapport à l'arbre principal en mouvement longitudinal du porte-diamant; des moyens d'embrayage (20; 20') servent à coupler ou à découpler les dits arbres, de sorte que lorsque les deux arbres couplés par l'embrayage (20; 20') tournent simultanément, le porte-diamant exécute uniquement un mouvement angulaire; lorsque seul l'arbre entraîné par le moyen d'entraînement (3; 3') découplé de l'autre arbre tourne, le porte-diamant exécute un déplacement longitudinal.1. A device for driving a diamond holder in which a diamond holder (32; 32 ') can move angularly and / or longitudinally, characterized in that a motor (14; 14') rotates a main shaft (2; 2 ') and a correction shaft (1; 1') by means of a drive means (3; 3 '), the said main shaft driving itself in rotation the said door -diamond (32; 32 '), and in that means (30, 31, 32, 34, 35; 30', 31 ', 32', 34 ', 35') make it possible to transform the rotary movement of the correction shaft with respect to the main shaft in longitudinal movement of the diamond holder; clutch means (20; 20 ') are used to couple or decouple said shafts, so that when the two shafts coupled by the clutch (20; 20') rotate simultaneously, the diamond holder performs only one movement angular; when only the shaft driven by the drive means (3; 3 ') decoupled from the other shaft rotates, the diamond holder performs a longitudinal movement. 2. Dispositif d'entraînement selon la revendication 1, caractérisé en ce que les dits moyens permettant de transformer le mouvement rotatif de l'arbre de correction par rapport à l'arbre principal en déplacement longitudinal du porte-diamant sont: un coulisseau de correction (30; 30') disposé à l'extrémité inférieure de l'arbre principal par l'entremise d'un adapteur (2a; 2a'), le dit porte-diamant (32; 32') étant disposé de façon à pouvoir se déplacer longitudina- lementàsous le coulisseau, une came (34; 34'), disposée à l'extrémité inférieure de l'arbre de correction (1; 1'), un palpeur (31; 31') disposé de façon à maintenir un contact avec le contour variable de la came afin de pouvoir se déplacer longitudinalement lors de la rotation de celle-ci, un ressort (35; 35') maintenant le palpeur en contact avec la came, le palpeur étant lié au porte-diamant.2. Drive device according to claim 1, characterized in that said means for transforming the rotary movement of the correction shaft relative to the main shaft in longitudinal movement of the diamond holder are: a correction slide (30; 30 ') arranged at the lower end of the main shaft by means of an adapter (2a; 2a'), the said diamond holder (32; 32 ') being arranged so that it can be move longitudinally beneath the slide, a cam (34; 34 '), arranged at the lower end of the correction shaft (1; 1'), a feeler (31; 31 ') arranged so as to maintain contact with the variable contour of the cam so as to be able to move longitudinally during its rotation, a spring (35; 35 ') holding the probe in contact with the cam, the probe being linked to the diamond holder. 3. Dispositif d'entraînement selon l'une des revendications 1 ou 2, caractérisé en ce que les moyens d'entraînement (3) sont reliés à l'arbre de principal (2).3. Drive device according to one of claims 1 or 2, characterized in that the drive means (3) are connected to the main shaft (2). 4. Dispositif d'entraînement selon la revendication 3, caractérisé en ce que les dits moyens d'embrayage comprennent un disque d'embrayage (4), relié à l'arbre de correction (1), et un joint d'embrayage (2b), relié à l'arbre principal (2), sur lesquels sont respectivement disposées une surface d'embrayage conduite (5) et une surface d'embrayage motrice (6).4. Drive device according to claim 3, characterized in that said clutch means comprise a clutch disc (4), connected to the correction shaft (1), and a clutch seal (2b ), connected to the main shaft (2), on which are respectively arranged a driven clutch surface (5) and a drive clutch surface (6). 5. Dispositif d'entraînement selon la revendication 4, caractérisé en ce que le porte-diamant exécute à la fois un déplacement angulaire et un déplacement longitudinal lorsque les deux arbres (1; 2) sont découplés.5. Drive device according to claim 4, characterized in that the diamond holder performs both an angular displacement and a longitudinal displacement when the two shafts (1; 2) are decoupled. 6. Dispositif d'entraînement selon la revendication 5, caractérisé en ce qu'il comprend un détecteur de position (12, 13; 12', 13').6. Drive device according to claim 5, characterized in that it comprises a position detector (12, 13; 12 ', 13'). 7. Dispositif d'entraînement selon l'une des revendications 1 ou 2, caractérisé en ce que les moyens d'entraînement (3') sont reliés à l'arbre de correction (1').7. Drive device according to one of claims 1 or 2, characterized in that the drive means (3 ') are connected to the correction shaft (1'). 8. Dispositif d'entraînement selon la revendication 7, caractérisé en ce que les dits moyens d'embrayage comprennent un adapteur (1a'), relié à l'arbre de correction (1'), et un disque d'embrayage (4'), relié à l'arbre principal (2'), sur lesquels sont respectivement disposées une surface d'embrayage motrice (6') et une surface d'embrayage conduite (5').8. Drive device according to claim 7, characterized in that said clutch means comprise an adapter (1a '), connected to the correction shaft (1 '), and a clutch disc (4'), connected to the main shaft (2 '), on which are respectively arranged a driving clutch surface (6') and a surface clutch clutch (5 '). 9. Dispositif d'entraînement selon l'une des revendications précédentes, caractérisé en ce que l'arbre non entraîné par les moyens d'entraînement (3; 3') est maintenu fixe par l'embrayage (20; 20') lorsque celui-ci découple les dits arbres.9. Drive device according to one of the preceding claims, characterized in that the shaft not driven by the drive means (3; 3 ') is held fixed by the clutch (20; 20') when that -this decouples the said trees. 10. Dispositif d'entraînement selon l'une des revendications précédentes, caractérisé en ce que l'arbre principal (2; 2') et l'arbre de correction (1; 1') sont maintenus par des roulements (7, 8; 7', 8') de façon à pouvoir tourner librement l'un par rapport à l'autre.10. Drive device according to one of the preceding claims, characterized in that the main shaft (2; 2 ') and the correction shaft (1; 1') are held by bearings (7, 8; 7 ', 8') so that they can rotate freely with respect to each other. 11. Dispositif d'entraînement selon l'une des revendications précédentes, caractérisé en ce que l'arbre de correction (1; 1') est disposé dans l'arbre principal (2; 2').11. Drive device according to one of the preceding claims, characterized in that the correction shaft (1; 1 ') is arranged in the main shaft (2; 2'). 12. Dispositif d'entraînement selon l'une des revendications précédentes, caractérisé en ce que l'arbre de correction (1; 1') et l'arbre principal (2; 2') ont un axe de rotation identique.12. Drive device according to one of the preceding claims, characterized in that the correction shaft (1; 1 ') and the main shaft (2; 2') have an identical axis of rotation. 13. Dispositif d'entraînement selon l'une des revendications précédentes, caractérisé en ce qu'un diamant (33; 33') est disposé latéralement sur le porte-diamant (32; 32').13. Drive device according to one of the preceding claims, characterized in that a diamond (33; 33 ') is arranged laterally on the diamond holder (32; 32'). 14. Dispositif d'entraînement selon l'une des revendications précédentes, caractérisé en ce qu'il comprend un codeur rotatif (9, 11; 9', 11').14. Drive device according to one of the preceding claims, characterized in that it comprises a rotary encoder (9, 11; 9 ', 11'). 15. Rectifieuse utilisant le dispositif selon l'une des revendications 1 à 14.15. Grinding machine using the device according to one of claims 1 to 14.
EP92811021A 1992-12-23 1992-12-23 One-engined driven device for a diamant holder with angular and longitudinal movement Expired - Lifetime EP0596179B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP92811021A EP0596179B1 (en) 1992-12-23 1992-12-23 One-engined driven device for a diamant holder with angular and longitudinal movement
DE69200165T DE69200165T2 (en) 1992-12-23 1992-12-23 Device driven by a single motor for a diamond holder with angular and longitudinal movement.
ES92811021T ES2056701T3 (en) 1992-12-23 1992-12-23 SINGLE MOTOR DRIVING DEVICE FOR AVERAGE MOVER WITH ANGULAR AND LONGITUDINAL MOVEMENT.
US08/166,825 US5497759A (en) 1992-12-23 1993-12-15 Driving apparatus for a diamond toolholder
JP5344694A JP2684329B2 (en) 1992-12-23 1993-12-21 Single motor drive for diamond tool holders with angular and longitudinal movement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92811021A EP0596179B1 (en) 1992-12-23 1992-12-23 One-engined driven device for a diamant holder with angular and longitudinal movement

Publications (2)

Publication Number Publication Date
EP0596179A1 true EP0596179A1 (en) 1994-05-11
EP0596179B1 EP0596179B1 (en) 1994-06-01

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Application Number Title Priority Date Filing Date
EP92811021A Expired - Lifetime EP0596179B1 (en) 1992-12-23 1992-12-23 One-engined driven device for a diamant holder with angular and longitudinal movement

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US (1) US5497759A (en)
EP (1) EP0596179B1 (en)
JP (1) JP2684329B2 (en)
DE (1) DE69200165T2 (en)
ES (1) ES2056701T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020023199A (en) * 2001-12-28 2002-03-28 김재수 grinding wheel dressing apparatus
JP5586409B2 (en) * 2010-10-08 2014-09-10 Ｎｔｎ株式会社 Dressing equipment
CN102950518B (en) * 2012-11-02 2015-07-15 佛山市业鹏机械厂 Automatic engaging and disengaging gear of transmission chain of all-in-one diamond edge and cone grinding machine
CN114346909A (en) * 2022-01-19 2022-04-15 东莞针刺科技有限公司 Full-automatic precise automatic tracking grinding wheel dressing device

Citations (4)

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Publication number Priority date Publication date Assignee Title
US3269381A (en) * 1963-05-03 1966-08-30 Universal American Corp Dressing assembly for grinding machine
DE1905144B2 (en) * 1969-02-03 1973-05-24 Lohf & Tillipaul, 2000 Hamburg DRESSING DEVICE FOR GRINDING WHEELS FOR DRESSING CONCAVES AND CONVEX PROFILES WITH STRAIGHT CONNECTION MOVEMENT
EP0304152A2 (en) * 1987-08-19 1989-02-22 Bryant Grinder Corporation Radius dressing apparatus
EP0512956A1 (en) * 1991-05-07 1992-11-11 Voumard Machines Co. S.A. Numerically controlled grinding machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1905390A (en) * 1930-04-30 1933-04-25 Lindner Herbert Device for shaping and truing grinding rolls
US2317411A (en) * 1941-11-08 1943-04-27 Ex Cell O Corp Dressing mechanism
US5003730A (en) * 1987-08-19 1991-04-02 Bryant Grinder Corporation Radius dressing apparatus
US5138799A (en) * 1991-04-12 1992-08-18 Bryant Grinder Corporation Probe positioning mechanism for a radius dresser

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269381A (en) * 1963-05-03 1966-08-30 Universal American Corp Dressing assembly for grinding machine
DE1905144B2 (en) * 1969-02-03 1973-05-24 Lohf & Tillipaul, 2000 Hamburg DRESSING DEVICE FOR GRINDING WHEELS FOR DRESSING CONCAVES AND CONVEX PROFILES WITH STRAIGHT CONNECTION MOVEMENT
EP0304152A2 (en) * 1987-08-19 1989-02-22 Bryant Grinder Corporation Radius dressing apparatus
EP0512956A1 (en) * 1991-05-07 1992-11-11 Voumard Machines Co. S.A. Numerically controlled grinding machine

Also Published As

Publication number Publication date
US5497759A (en) 1996-03-12
JP2684329B2 (en) 1997-12-03
ES2056701T3 (en) 1994-10-01
EP0596179B1 (en) 1994-06-01
JPH06206162A (en) 1994-07-26
DE69200165D1 (en) 1994-11-17
DE69200165T2 (en) 1995-02-16

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