EP0446128A1 - Sharpening device with spindle grinding means for tools with straight or twisted cutting edges - Google Patents

Sharpening device with spindle grinding means for tools with straight or twisted cutting edges Download PDF

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Publication number
EP0446128A1
EP0446128A1 EP91400607A EP91400607A EP0446128A1 EP 0446128 A1 EP0446128 A1 EP 0446128A1 EP 91400607 A EP91400607 A EP 91400607A EP 91400607 A EP91400607 A EP 91400607A EP 0446128 A1 EP0446128 A1 EP 0446128A1
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EP
European Patent Office
Prior art keywords
roller
drum
spindle
rod
stirrup
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EP91400607A
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German (de)
French (fr)
Inventor
Michel Nys
Christian Riquier
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OUTILLAGE-GVR
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OUTILLAGE-GVR
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Publication of EP0446128A1 publication Critical patent/EP0446128A1/en
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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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/02—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of milling cutters
    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • B24B19/04—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for fluting drill shanks

Definitions

  • the subject of the invention is a device for sharpening tools with straight and helical edges, in particular for machine tool milling cutters.
  • EP-A-0.281.025 also discloses a sharpening device comprising a spindle guide by roller.
  • the roller is placed between two plates located on either side of the spindle and compressed by means of electromagnets which bring the plates together.
  • the spindle is supported on either side of the roller by two ball cages which move in guide tubes, but the movement of the spindle is limited to the length of the tubes, which limits the length of sharpening.
  • the present invention aims to solve the aforementioned drawbacks and to improve the known devices. This improvement is carried out in particular by reducing the bending of the spindle and by increasing the useful displacement length for the same size.
  • the subject of the invention is a device for sharpening tools with straight and helical edges of the type comprising a tool-holder spindle (or work-piece) moving in rotation and in translation in a housing, and a guide roller for the spindle intended to rest on it by at least one compression member, housed in the housing in a direction radial to the spindle, the roller being orientable in the housing with respect to the axis of the spindle so that the angle between the direction of rolling of the roller and the axis of the spindle, the roller being carried by a bracket connected to the housing by a drum whose rotation determines the angle between the direction of rolling of the roller and the axis of the spindle and l '' compression member exerting an adjustable roller support force characterized in that the compression member is disposed between the underside of the drum and the stirrup, and in that the stirrup has a lifting catch intended to lift the stone.
  • the roller can be removed from the spindle by means of a handle mounted on the grip nut.
  • the roller is removed to separate the rotational and translational movements. This allows the sharpening of cutting tools with straight edges, the rotation of the tool on itself to sharpen another tooth and the sharpening of a tool according to a movement generated by the following of a profile by means of a guide finger.
  • the device consists of a housing 9 in which can move freely in translation and in rotation a spindle 12 tool holder (or workpiece carrier).
  • the spindle has at one end a means not shown, suitable for clamping the tools to be sharpened and at the other, a handle not also shown, allowing manual movement of the spindle 12.
  • the spindle 12 is supported by two ball bearings 11 located on either side of the housing 9; the two bearings are rotary linear, commonly called ball bearings, characterized by a cage provided with ball circuits.
  • Each circuit of balls forms an endless chain and while half of the balls transmit the load by moving with the shaft, the other half is recycled in the unloaded area. This circulation of balls then admits linear displacements of unlimited length. The useful sharpening length is therefore only limited by the length of the spindle.
  • This arrangement (ball bearings) is isolated from the outside by means of two lateral flanges 10 provided with lip seals.
  • a roller 6 is housed in the housing and disposed on the spindle 12 in a radial direction thereto.
  • the roller 6 is carried by a stirrup 18 by means of a pin 7.
  • This stirrup 18 is orientable at all angles thanks to bearings 5 and 8.
  • the housing comprises a cylindrical tubular cavity 25 radial with respect to the axis of the spindle, in which the stirrup 18 is housed.
  • the stirrup on the side opposite the roller, has a rod-shaped extension 26, which projects outside this tubular cavity 25 of the housing.
  • a drum 3 closes this tubular cavity 25. It is provided with a central opening for the passage of the stirrup rod 26.
  • This drum has a through circular groove 39 intended for the angular adjustment of the roller and for blocking this adjustment. To this end a screw 2 secures the drum to the housing.
  • a flange 4 intermediate between the drum 3 and the end 40 of the cylinder.
  • a compression member between the caliper and the drum 3 which exerts its forces on the one hand on the drum or the flange 4, on the other hand on the caliper, intended to hold the roller 6 in contact on pin 12.
  • the compression member is a stack of spring washers 16 which abut on a shoulder 27 of the stirrup and on the underside 28 of the annular plate 15.
  • the drum 3 (FIGS. 1 and 2) is made to rotate with the roller holder caliper 18 by means of an adjustment rod 13 which extends in the drum radially from the caliper rod 26 in a recess of immobilization 28 and by means of adjustment screws 17.
  • the recess 28 has an angular clearance allowing the rotation of the drum 3 and the stirrup rod 26 to be adjusted, and a vertical clearance 29 allowing the vertical displacements of the stirrup rod in the drum.
  • the screws 17 are coaxial and directed towards each other, FIG. 2, the ends of the screws 17 trap the head of the adjustment rod 13.
  • the rotation in one direction or the other of the drum 3 drives, by the adjusting screws 17 and the adjusting rod 13, the roller holder caliper 18 in the same rotational movement.
  • the immobilization in rotation can be achieved by concordance of shapes: it is indeed possible to arrange or produce on the profile of the stirrup rod 26 an element preventing the rotation of said rod, for example a key, a chamfered profile, ...
  • the end of the stirrup rod comprises a gripping means intended to lift the roller; this means consists of a thread 41 produced on the upper end of the stirrup rod, and of a nut 30 which abuts against the upper surface of the drum.
  • the nut is extended laterally by a handle 1 whose rotation in the thread 41 at the end of the stirrup rod 26 causes said stirrup rod to rise and the roller 6 to be raised.
  • the nut 3 consists of two parts: a central nut 35, the upper end of which is grooved, an external concentric button 36, internally grooved so that the button 36 slides on the nut 35.
  • the handle 1 is integral button.
  • a spring 37 recalls the button engaged on the nut 35. This arrangement makes it possible to adjust the position of the handle on the nut and then to keep the handle positioned against a stop 38, whatever the pressure exerted on the spring 34 .
  • the device according to the invention offers numerous advantages: it is of simple and inexpensive design and construction, it makes it possible to sharpen tools of all lengths with great precision of the pressure settings of the roller without deformation of the spindle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Units (AREA)

Abstract

Sharpening device for tools with straight or helical edges, which consists of a housing (9) having a toolholder spindle (12) guided by rotary linear bearings and a roller (6) which is rotationally movable and of which the orientation in relation to the spindle (12) is adjustable with high accuracy by means of a drum and two coaxial screws (17). The roller (6) is applied to the spindle (12) by spring washers (16). The application of the roller (6) to the spindle (12) causes a combined rotational and translational advance of the spindle (12). To separate the rotational and translational movements, the roller (6) is withdrawn by means of a handle (1). <IMAGE>

Description

L'invention a pour objet un dispositif d'affûtage des outils à arêtes droites et hélicoïdales, notamment pour fraises de machine-outil.The subject of the invention is a device for sharpening tools with straight and helical edges, in particular for machine tool milling cutters.

On connaît depuis le brevet US-A-2.503.926 l'utilisation du guidage d'une broche en translation et rotation par un galet dans le but d'affûter des outils à gorges droites ou hélicoïdales. Cependant le dispositif est destiné aux petites pièces: la broche n'est pas soutenue autrement que par deux colliers situés aux extrémités; de ce fait la pression du galet provoque une flexion de la broche ce qui est au détriment de la précision de l'affûtage; et il n'est pas possible de tailler de nouveaux outils parce que la pénétration dans l'acier est importante et requiert, pour éviter tout glissement, une importante pression du galet sur la broche.We know from US-A-2,503,926 patent the use of guiding a spindle in translation and rotation by a roller in order to sharpen tools with straight or helical grooves. However, the device is intended for small parts: the spindle is not supported other than by two collars located at the ends; therefore the pressure of the roller causes a bending of the spindle which is to the detriment of the sharpening precision; and it is not possible to cut new tools because the penetration in the steel is important and requires, to avoid slipping, a significant pressure of the roller on the spindle.

On connaît encore par le EP-A-0.281.025 un dispositif d'affûtage comportant un guidage de broche par galet. Dans ce dispositif le galet est disposé entre deux plaques situées de part et d'autre de la broche et comprimé au moyen d'électro-aimants qui rapprochent les plaques. La broche est supportée de part et d'autre du galet par deux cages à billes qui se déplacent dans des tubes de guidage, mais le déplacement de la broche est limité à la longueur des tubes ce qui limite la longueur d'affûtage.EP-A-0.281.025 also discloses a sharpening device comprising a spindle guide by roller. In this device, the roller is placed between two plates located on either side of the spindle and compressed by means of electromagnets which bring the plates together. The spindle is supported on either side of the roller by two ball cages which move in guide tubes, but the movement of the spindle is limited to the length of the tubes, which limits the length of sharpening.

La présente invention a pour but de résoudre les inconvénients précités et d'améliorer les dispositifs connus. Cette amélioration s'effectue notamment en diminuant la flexion de la broche et en augmentant pour un même encombrement la longueur utile de déplacement.The present invention aims to solve the aforementioned drawbacks and to improve the known devices. This improvement is carried out in particular by reducing the bending of the spindle and by increasing the useful displacement length for the same size.

L'invention a pour objet un dispositif d'affûtage d'outils à arêtes droites et hélicoïdales du type comportant une broche porte-outil (ou porte-pièce) se déplaçant en rotation et en translation dans un boîtier, et un galet de guidage de la broche destiné à s'appuyer sur celle-ci par au moins un organe de compression, logé dans le boîtier dans une direction radiale à la broche, le galet étant orientable dans le boîtier par rapport à l'axe de la broche de telle manière que l'on puisse régler avec précision l'angle entre la direction de roulement du galet et l'axe de la broche, le galet étant porté par un étrier relié au boîtier par un tambour dont la rotation détermine l'angle entre la direction de roulement du galet et l'axe de la broche et l'organe de compression exerçant une force d'appui du galet réglable caractérisé en ce que l'organe de compression est disposé entre la face inférieure du tambour et l'étrier, et en ce que l'étrier comporte une prise de levage destinée à soulever le galet.The subject of the invention is a device for sharpening tools with straight and helical edges of the type comprising a tool-holder spindle (or work-piece) moving in rotation and in translation in a housing, and a guide roller for the spindle intended to rest on it by at least one compression member, housed in the housing in a direction radial to the spindle, the roller being orientable in the housing with respect to the axis of the spindle so that the angle between the direction of rolling of the roller and the axis of the spindle, the roller being carried by a bracket connected to the housing by a drum whose rotation determines the angle between the direction of rolling of the roller and the axis of the spindle and l '' compression member exerting an adjustable roller support force characterized in that the compression member is disposed between the underside of the drum and the stirrup, and in that the stirrup has a lifting catch intended to lift the stone.

Le dispositif est encore remarquable par les caractéristiques suivantes:

  • l'étrier comporte une extension verticale ou tige d'étrier qui traverse le tambour, montée mobile en translation et immobile en rotation dans le tambour,
  • l'extrémité de la tige d'étrier opposée au galet comporte un moyen de préhension destiné à coopérer avec la surface supérieure du tambour pour le déplacement de ladite tige dans le tambour,
  • le moyen de préhension est constitué d'un filetage réalisé sur l'extrémité supérieure de la tige d'étrier, et d'un écrou venant en butée contre la surface supérieure du tambour,
  • la tige d'étrier présente une section transversale de forme non totalement circulaire et le tambour une ouverture de forme correspondante afin d'assurer l'immobilité de la tige en rotation dans le tambour,
  • une tige de réglage et d'immobilisation en rotation est reliée solidairement à la tige d'étrier et s'étend dans un évidement du tambour. Cette tige est prise entre deux vis qui permettent de régler finement l'angle de l'hélice, c'est-à-dire l'angle entre l'axe de roulement du galet et l'axe de la broche,
  • la cavité d'immobilisation en rotation présente un jeu vertical pour les mouvements de translation de l'étrier,
  • l'organe de compression est constitué d'un empilement de rondelles ressort dont l'agencement en opposition ou en parallèle, ou les deux combinés permet de régler la force maximale exercée sur le galet,
  • le dispositif comporte un contre ressort disposé entre l'écrou de levage de la tige d'étrier et le tambour destiné au réglage fin de la force d'appui du galet sur la broche,
  • la broche porte-outil est guidée dans son mouvement par au moins deux roulements linéaires rotatifs; en outre, selon l'invention, on prévoit de monter des roulements à billes rotatifs sur les roulements linéaires rotatifs eux-mêmes de manière à éliminer tout frottement en rotation. Dans ce cas la rotation est principalement assurée par les roulements à billes.
The device is also remarkable for the following characteristics:
  • the stirrup has a vertical extension or stirrup rod which passes through the drum, mounted movable in translation and motionless in rotation in the drum,
  • the end of the stirrup rod opposite the roller comprises a gripping means intended to cooperate with the upper surface of the drum for the movement of said rod in the drum,
  • the gripping means consists of a thread produced on the upper end of the stirrup rod, and of a nut abutting against the upper surface of the drum,
  • the stirrup rod has a cross section of not completely circular shape and the drum has an opening of corresponding shape in order to ensure the immobility of the rod in rotation in the drum,
  • a rotary adjustment and immobilization rod is integrally connected to the caliper rod and extends in a recess of the drum. This rod is taken between two screws which allow fine adjustment of the propeller angle, that is to say the angle between the rolling axis of the roller and the axis of the spindle,
  • the rotating immobilization cavity has a vertical clearance for the translational movements of the stirrup,
  • the compression member consists of a stack of spring washers whose arrangement in opposition or in parallel, or the two combined makes it possible to adjust the maximum force exerted on the roller,
  • the device comprises a counter spring arranged between the lifting nut of the stirrup rod and the drum intended for fine adjustment of the bearing force of the roller on the spindle,
  • the tool-holder spindle is guided in its movement by at least two rotary linear bearings; in addition, according to the invention, provision is made to mount rotary ball bearings on the rotary linear bearings themselves so as to eliminate any friction in rotation. In this case the rotation is mainly ensured by the ball bearings.

Le galet peut être retiré de la broche au moyen d'une manette montée sur l'écrou de préhension. Le galet est retiré pour séparer les mouvements de rotation et de translation. Ceci permet l'affûtage des outils de coupe à arêtes droites, la rotation de l'outil sur lui même pour affûter une autre dent et l'affûtage d'un outil selon un mouvement engendré par le suivi d'un profil au moyen d'un doigt de guidage.The roller can be removed from the spindle by means of a handle mounted on the grip nut. The roller is removed to separate the rotational and translational movements. This allows the sharpening of cutting tools with straight edges, the rotation of the tool on itself to sharpen another tooth and the sharpening of a tool according to a movement generated by the following of a profile by means of a guide finger.

D'autres caractéristiques ressortiront de la description qui suit d'un exemple de réalisation du dispositif selon l'invention illustrée au dessin annexé et sur lequel:

  • la figure 1 est une vue en coupe du dispositif selon l'invention dans une première variante;
  • la figure 2 est une vue de dessus selon la direction B du dispositif;
  • la figure 3 est une vue en coupe du dispositif selon l'invention dans une seconde variante;
Other characteristics will emerge from the following description of an exemplary embodiment of the device according to the invention illustrated in the attached drawing and in which:
  • Figure 1 is a sectional view of the device according to the invention in a first variant;
  • Figure 2 is a top view in direction B of the device;
  • Figure 3 is a sectional view of the device according to the invention in a second variant;

Comme le montre la figure 1, le dispositif est constitué d'un boîtier 9 dans lequel peut se déplacer librement en translation et en rotation une broche 12 porte outil (ou porte pièce). La broche présente à une extrémité un moyen non représenté, adapté pour le serrage des outils à affûter et à l'autre, une poignée non représentée également, permettant le déplacement manuel de la broche 12.As shown in Figure 1, the device consists of a housing 9 in which can move freely in translation and in rotation a spindle 12 tool holder (or workpiece carrier). The spindle has at one end a means not shown, suitable for clamping the tools to be sharpened and at the other, a handle not also shown, allowing manual movement of the spindle 12.

La broche 12 est supportée par deux roulements à billes 11 situées de part et d'autre du boîtier 9; les deux roulements sont linéaires rotatifs, appelés communément douilles à billes, caractérisés par une cage munie de circuits à billes. Chaque circuit de billes forme une chaîne sans fin et tandis que la moitié des billes transmet la charge en se déplaçant avec l'arbre, l'autre moitié est recyclée dans la zone non chargée. Cette circulation de billes admet alors des déplacements linéaires de longueur illimitée. La longueur utile d'affûtage n'est donc plus limitée que par la longueur de la broche..The spindle 12 is supported by two ball bearings 11 located on either side of the housing 9; the two bearings are rotary linear, commonly called ball bearings, characterized by a cage provided with ball circuits. Each circuit of balls forms an endless chain and while half of the balls transmit the load by moving with the shaft, the other half is recycled in the unloaded area. This circulation of balls then admits linear displacements of unlimited length. The useful sharpening length is therefore only limited by the length of the spindle.

Cet arrangement (roulements à billes) est isolé de l'extérieur au moyen de deux flasques latéraux 10 munis de joints à lèvre.This arrangement (ball bearings) is isolated from the outside by means of two lateral flanges 10 provided with lip seals.

Un galet 6 est logé dans le boîtier et disposé sur la broche 12 dans une direction radiale à celle-ci. Le galet 6 est porté par un étrier 18 au moyen d'un axe 7. Cet étrier 18 est orientable selon tous les angles grâce à des roulements 5 et 8.A roller 6 is housed in the housing and disposed on the spindle 12 in a radial direction thereto. The roller 6 is carried by a stirrup 18 by means of a pin 7. This stirrup 18 is orientable at all angles thanks to bearings 5 and 8.

Le boîtier comporte une cavité tubulaire cylindrique 25 radiale par rapport à l'axe de la broche, dans laquelle l'étrier 18 est logé. L'étrier, du côté opposé au galet, présente une extension en forme de tige 26, qui fait saillie à l'extérieur de cette cavité tubulaire 25 du boîtier.The housing comprises a cylindrical tubular cavity 25 radial with respect to the axis of the spindle, in which the stirrup 18 is housed. The stirrup, on the side opposite the roller, has a rod-shaped extension 26, which projects outside this tubular cavity 25 of the housing.

De préférence on prévoit de monter un anneau 15 sur la tige d'étrier 26, lui-même monté sur des roulements 5 et 14 qui assurent la rotation de la tige dans le boîtier.Preferably provision is made to mount a ring 15 on the stirrup rod 26, itself mounted on bearings 5 and 14 which ensure the rotation of the rod in the housing.

Un tambour 3 vient fermer cette cavité tubulaire 25. Il est muni d'une ouverture centrale pour le passage de la tige d'étrier 26.A drum 3 closes this tubular cavity 25. It is provided with a central opening for the passage of the stirrup rod 26.

Ce tambour comporte une rainure circulaire traversante 39 destinée au réglage angulaire du galet et au blocage de ce réglage. A cette fin une vis 2 solidarise le tambour au boîtier.This drum has a through circular groove 39 intended for the angular adjustment of the roller and for blocking this adjustment. To this end a screw 2 secures the drum to the housing.

Dans l'exemple représenté au dessin on prévoit en outre un flasque 4 intermédiaire entre le tambour 3 et l'extrémité 40 du cylindre.In the example shown in the drawing, there is also provided a flange 4 intermediate between the drum 3 and the end 40 of the cylinder.

Selon l'invention on prévoit un organe de compression entre l'étrier et le tambour 3 qui exerce ses forces d'une part sur le tambour ou le flasque 4, d'autre part sur l'étrier, destiné à maintenir le galet 6 en contact sur la broche 12.According to the invention there is provided a compression member between the caliper and the drum 3 which exerts its forces on the one hand on the drum or the flange 4, on the other hand on the caliper, intended to hold the roller 6 in contact on pin 12.

L'organe de compression est un empilement de rondelles ressort 16 qui viennent en butée sur un épaulement 27 de l'étrier et sur la face inférieure 28 de la plaque annulaire 15.The compression member is a stack of spring washers 16 which abut on a shoulder 27 of the stirrup and on the underside 28 of the annular plate 15.

Le tambour 3 (figures 1 et 2) est solidarisé en rotation avec l'étrier porte-galet 18 au moyen d'une tige de réglage 13 qui s'étend dans le tambour radialement depuis la tige d'étrier 26 dans un évidement d'immobilisation 28 et au moyen des vis de réglage 17.The drum 3 (FIGS. 1 and 2) is made to rotate with the roller holder caliper 18 by means of an adjustment rod 13 which extends in the drum radially from the caliper rod 26 in a recess of immobilization 28 and by means of adjustment screws 17.

L'évidement 28 présente un jeu angulaire permettant le réglage en rotation du tambour 3 et de la tige d'étrier 26, et un jeu vertical 29 permettant les déplacements verticaux de la tige d'étrier dans le tambour.The recess 28 has an angular clearance allowing the rotation of the drum 3 and the stirrup rod 26 to be adjusted, and a vertical clearance 29 allowing the vertical displacements of the stirrup rod in the drum.

Les vis 17 sont coaxiales et dirigées l'une vers l'autre, figure 2, les extrémités des vis 17 emprisonnent la tête de la tige de réglage 13.The screws 17 are coaxial and directed towards each other, FIG. 2, the ends of the screws 17 trap the head of the adjustment rod 13.

La rotation dans un sens ou dans l'autre du tambour 3 entraîne, par les vis de réglage 17 et la tige de réglage 13, l'étrier porte-galet 18 dans le même mouvement de rotation.The rotation in one direction or the other of the drum 3 drives, by the adjusting screws 17 and the adjusting rod 13, the roller holder caliper 18 in the same rotational movement.

Une fois la position angulaire du galet 6 déterminée par le tambour 3, un réglage fin est possible au moyen des vis 17 qui, manipulées dans le bon sens, déplacent la tige de réglage 13 et le galet 6 sans faire bouger le tambour 3. Les réglages étant finis, la vis 2 fixe par serrage la position du tambour 3.Once the angular position of the roller 6 determined by the drum 3, fine adjustment is possible by means of the screws 17 which, manipulated in the correct direction, move the adjustment rod 13 and the roller 6 without moving the drum 3. The adjustments are finished, screw 2 fixes by tightening the position of the drum 3.

Dans une variante non représentée, l'immobilisation en rotation peut être réalisée par concordance de formes: il est en effet possible de disposer ou réaliser sur le profil de la tige d'étrier 26 un élément interdisant la rotation de ladite tige, par exemple une clavette, un profil chanfreiné, ...In a variant not shown, the immobilization in rotation can be achieved by concordance of shapes: it is indeed possible to arrange or produce on the profile of the stirrup rod 26 an element preventing the rotation of said rod, for example a key, a chamfered profile, ...

Selon l'invention l'extrémité de la tige d'étrier comporte un moyen de préhension destiné à soulever le galet; ce moyen est constitué d'un filetage 41 réalisé sur l'extrémité supérieure de la tige d'étrier, et d'un écrou 30 qui vient en butée contre la surface supérieure du tambour.According to the invention, the end of the stirrup rod comprises a gripping means intended to lift the roller; this means consists of a thread 41 produced on the upper end of the stirrup rod, and of a nut 30 which abuts against the upper surface of the drum.

L'écrou est prolongé latéralement par une poignée 1 dont la rotation dans le filetage 41 en bout de la tige d'étrier 26 provoque la montée de ladite tige d'étrier et le soulèvement du galet 6.The nut is extended laterally by a handle 1 whose rotation in the thread 41 at the end of the stirrup rod 26 causes said stirrup rod to rise and the roller 6 to be raised.

En outre on prévoit dans le tambour un évidement circulaire 31 dans lequel est disposé un roulement à billes 32 sur lequel tourne l'écrou 30. Cette disposition permet d'éliminer les frottements de l'écrou contre la surface du tambour, qui peuvent être considérables.In addition there is provided in the drum a circular recess 31 in which is disposed a ball bearing 32 on which the nut 30 rotates. This arrangement makes it possible to eliminate the friction of the nut against the surface of the drum, which can be considerable. .

La figure 3 illustre une variante du dispositif d'affûtage selon laquelle:

  • 1°- la broche 12 est supportée de part et d'autre du galet 6 par des doubles roulements: un premier roulement linéaire rotatif 11 et sur ce premier roulement au moins une paire de roulements rotatifs 33. Cette disposition a pour objectif de supprimer tous les frottements même les plus faibles qui peuvent apparaître lorsque l'angle d'attaque est faible (pas du filet très petit).
  • 2°- Un contre ressort 34 est monté entre l'écrou 30 et le roulement 32. Dans l'exemple ce ressort est une rondelle mais tout organe analogue peut être employé. Il appuie sur l'écrou vers l'extrémité de la tige d'étrier, c'est-à-dire en direction opposée du galet et s'oppose donc à la force de l'organe de compression 16. Ce ressort 34 a pour fonction de rendre réglable avec précision la compression du galet sur la broche.
FIG. 3 illustrates a variant of the sharpening device according to which:
  • 1 ° - the spindle 12 is supported on either side of the roller 6 by double bearings: a first rotary linear bearing 11 and on this first bearing at least one pair of rotary bearings 33. This provision aims to remove all even the smallest friction which can appear when the angle of attack is small (not the very small thread).
  • 2 ° - A counter spring 34 is mounted between the nut 30 and the bearing 32. In the example this spring is a washer but any similar member can be used. It presses the nut towards the end of the stirrup rod, that is to say in the opposite direction from the roller and therefore opposes the force of the compression member 16. This spring 34 has for function of making the compression of the roller on the spindle precisely adjustable.

En outre l'écrou 3 est constitué de deux pièces: un écrou central 35 dont l'extrémité supérieure est cannelée, un bouton concentrique extérieur 36, cannelé intérieurement de sorte que le bouton 36 coulisse sur l'écrou 35. La poignée 1 est solidaire du bouton. Un ressort 37 rappelle le bouton en prise sur l'écrou 35. Cette disposition permet de régler la position de la poignée sur l'écrou et alors de maintenir la poignée positionnée contre une butée 38, quelle que soit la pression exercée sur le ressort 34.In addition, the nut 3 consists of two parts: a central nut 35, the upper end of which is grooved, an external concentric button 36, internally grooved so that the button 36 slides on the nut 35. The handle 1 is integral button. A spring 37 recalls the button engaged on the nut 35. This arrangement makes it possible to adjust the position of the handle on the nut and then to keep the handle positioned against a stop 38, whatever the pressure exerted on the spring 34 .

Le dispositif selon l'invention offre de nombreux avantages: il est de conception et construction simple et non coûteuse, il permet d'affûter les outils de toutes longueurs avec une grande précision des réglages de pression du galet sans déformation de la broche.The device according to the invention offers numerous advantages: it is of simple and inexpensive design and construction, it makes it possible to sharpen tools of all lengths with great precision of the pressure settings of the roller without deformation of the spindle.

Claims (11)

1 - Dispositif d'affûtage d'outils à arêtes droites et hélicoïdales du type comportant une broche porte-outil (12) se déplaçant en rotation et en translation dans un boîtier (9), et un galet (6) de guidage de la broche destiné à s'appuyer sur celle-ci par au moins un organe de compression (16), logé dans le boîtier dans une direction radiale à la broche, le galet étant orientable dans le boîtier par rapport à l'axe de la broche de telle manière que l'on puisse régler avec précision l'angle entre la direction de roulement du galet et l'axe de la broche, le galet étant porté par un étrier (18) relié au boîtier par un tambour (3) dont la rotation détermine l'angle entre la direction de roulement du galet et l'axe de la broche et l'organe de compression exerçant une force d'appui du galet réglable caractérisé en ce que l'organe de compression (16) est disposé entre la face inférieure du tambour ou d'un élément solidaire (15) et l'étrier (18), et en ce que l'étrier comporte une prise de levage (30,41) destinée à soulever le galet. 1 - Tool sharpening device with straight and helical edges of the type comprising a tool-holder spindle (12) moving in rotation and in translation in a housing (9), and a roller (6) for guiding the spindle intended to rest on the latter by at least one compression member (16), housed in the housing in a direction radial to the spindle, the roller being orientable in the housing relative to the axis of the spindle of such so that the angle between the rolling direction of the roller and the axis of the spindle can be precisely adjusted, the roller being carried by a bracket (18) connected to the housing by a drum (3) whose rotation determines the angle between the rolling direction of the roller and the axis of the spindle and the compression member exerting an adjustable bearing force of the roller, characterized in that the compression member (16) is arranged between the underside of the drum or of an integral element (15) and the stirrup (18), and in that the caliper has a lifting socket (30,41) for lifting the roller. 2 - Dispositif d'affûtage d'outils selon la revendication 1 caractérisé en ce que l'étrier (18) comporte une extension verticale ou tige d'étrier (26) qui traverse le tambour (3), montée mobile en translation et immobile en rotation dans le tambour. 2 - Tool sharpening device according to claim 1 characterized in that the stirrup (18) has a vertical extension or stirrup rod (26) which passes through the drum (3), mounted movable in translation and immobile in rotation in the drum. 3 - Dispositif d'affûtage d'outils selon la revendication 2 caractérisé en ce que l'extrémité de la tige d'étrier (26) opposée au galet (6) comporte un moyen de préhension destiné à coopérer avec la surface supérieure du tambour (3) pour le déplacement de ladite tige dans le tambour, 3 - Tool sharpening device according to claim 2 characterized in that the end of the stirrup rod (26) opposite the roller (6) comprises a gripping means intended to cooperate with the upper surface of the drum ( 3) for the displacement of said rod in the drum, 4 - Dispositif d'affûtage d'outils selon la revendication 3 caractérisé en ce que le moyen de préhension est constitué d'un filetage (41) réalisé sur l'extrémité supérieure de la tige d'étrier (26), et d'un écrou (30) venant en butée contre la surface supérieure du tambour (3), 4 - Tool sharpening device according to claim 3 characterized in that the gripping means consists of a thread (41) formed on the upper end of the stirrup rod (26), and a nut (30) abutting against the upper surface of the drum (3), 5 - Dispositif d'affûtage d'outils selon la revendication 2 caractérisé en ce que la tige d'étrier (26) présente une section transversale de forme non totalement circulaire, et le tambour, une ouverture de forme correspondante afin d'assurer l'immobilité de la tige en rotation dans le tambour. 5 - Tool sharpening device according to claim 2 characterized in that the stirrup rod (26) has a cross section of not completely circular shape, and the drum, an opening of corresponding shape to ensure the immobility of the rotating rod in the drum. 6 - Dispositif d'affûtage d'outils selon la revendication 2 caractérisé en ce qu'une tige (13) de réglage et d'immobilisation en rotation est reliée solidairement à la tige d'étrier (26) et s'étend dans un évidement (28) du tambour, ladite tige étant prise entre deux vis (17) de réglage de l'angle de l'hélice. 6 - Tool sharpening device according to claim 2 characterized in that a rod (13) for adjustment and immobilization in rotation is integrally connected to the stirrup rod (26) and extends in a recess (28) of the drum, said rod being taken between two screws (17) for adjusting the angle of the propeller. 7 - Dispositif d'affûtage d'outils selon la revendication 6 caractérisé en ce que l'évidement (28) d'immobilisation en rotation présente un jeu vertical (29) pour les mouvements de translation de l'étrier (18). 7 - Tool sharpening device according to claim 6 characterized in that the recess (28) for immobilization in rotation has a vertical clearance (29) for the translational movements of the stirrup (18). 8 - Dispositif d'affûtage d'outils selon la revendication 1 caractérisé en ce que l'organe de compression (16) est constitué d'un empilement de rondelles ressort dont l'agencement en opposition ou en parallèle, ou les deux combinés permet de régler la force maximale exercée sur le galet (6). 8 - Tool sharpening device according to claim 1 characterized in that the compression member (16) consists of a stack of spring washers whose arrangement in opposition or in parallel, or the two combined allows adjust the maximum force exerted on the roller (6). 9 - Dispositif d'affûtage d'outils selon la revendication 1 caractérisé en ce qu'il comporte un contre ressort (34) disposé entre l'écrou (30) de levage de la tige d'étrier (26) et le tambour (3), destiné au réglage fin de la force d'appui du galet (6) sur la broche (12). 9 - Tool sharpening device according to claim 1 characterized in that it comprises a counter spring (34) disposed between the nut (30) for lifting the stirrup rod (26) and the drum (3 ), intended for fine adjustment of the support force of the roller (6) on the spindle (12). 10- Dispositif selon la revendication 1 caractérisé en ce que la broche (12) est logée dans le boîtier (9) à l'aide d'au moins un roulement linéaire rotatif (11) permettant des mouvements de translation de longueur illimitée. 10- Device according to claim 1 characterized in that the pin (12) is housed in the housing (9) using at least one rotary linear bearing (11) allowing translation movements of unlimited length. 11 - Dispositif selon la revendication 10 caractérisé en ce qu'il comporte des roulements à billes rotatifs montés sur les roulements linéaires rotatifs. 11 - Device according to claim 10 characterized in that it comprises rotary ball bearings mounted on the rotary linear bearings.
EP91400607A 1990-03-06 1991-03-06 Sharpening device with spindle grinding means for tools with straight or twisted cutting edges Ceased EP0446128A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9002979 1990-03-06
FR9002979A FR2659260B1 (en) 1990-03-06 1990-03-06 SHARPENING DEVICE FOR TOOLS WITH STRAIGHT OR HELICAL EDGES PROVIDED WITH A SPINDLE GUIDE.

Publications (1)

Publication Number Publication Date
EP0446128A1 true EP0446128A1 (en) 1991-09-11

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Application Number Title Priority Date Filing Date
EP91400607A Ceased EP0446128A1 (en) 1990-03-06 1991-03-06 Sharpening device with spindle grinding means for tools with straight or twisted cutting edges

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EP (1) EP0446128A1 (en)
FR (1) FR2659260B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100439037C (en) * 2006-02-24 2008-12-03 徐东杰 Milling cutter edge grinding machine
CN101804594A (en) * 2010-05-07 2010-08-18 台州北平机床有限公司 Grinding device for cutter slot

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503926A (en) * 1945-04-28 1950-04-11 Raymond T Moloney Spiral grinding machine
US3183012A (en) * 1963-05-14 1965-05-11 Peterson Machine Tool Inc Chuck mounting
FR2122657A5 (en) * 1971-01-19 1972-09-01 Lucas Rene
DE2522644A1 (en) * 1975-05-22 1976-12-09 Duerkoppwerke Turntable with thrust bearing support used in e.g. weaving appts. - has inclined rollers in holders in frame bores and absorbs radial and axial loading
DE3020317A1 (en) * 1980-05-29 1981-12-03 Horst 5630 Remscheid Stanzl Attachment for grinding helically fluted tools - provides infinite flute pitch adjustment during axial movement of work carrying spindle
DE3232689A1 (en) * 1982-09-02 1984-03-08 Volker 8044 Lohhof Zang Device for adjusting helical pitches, in particular for grinding spiral grooves and threads
EP0281025A1 (en) * 1987-03-04 1988-09-07 Volker Zang Device for grinding cutting tools with straight or helical groove

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503926A (en) * 1945-04-28 1950-04-11 Raymond T Moloney Spiral grinding machine
US3183012A (en) * 1963-05-14 1965-05-11 Peterson Machine Tool Inc Chuck mounting
FR2122657A5 (en) * 1971-01-19 1972-09-01 Lucas Rene
DE2522644A1 (en) * 1975-05-22 1976-12-09 Duerkoppwerke Turntable with thrust bearing support used in e.g. weaving appts. - has inclined rollers in holders in frame bores and absorbs radial and axial loading
DE3020317A1 (en) * 1980-05-29 1981-12-03 Horst 5630 Remscheid Stanzl Attachment for grinding helically fluted tools - provides infinite flute pitch adjustment during axial movement of work carrying spindle
DE3232689A1 (en) * 1982-09-02 1984-03-08 Volker 8044 Lohhof Zang Device for adjusting helical pitches, in particular for grinding spiral grooves and threads
EP0281025A1 (en) * 1987-03-04 1988-09-07 Volker Zang Device for grinding cutting tools with straight or helical groove

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100439037C (en) * 2006-02-24 2008-12-03 徐东杰 Milling cutter edge grinding machine
CN101804594A (en) * 2010-05-07 2010-08-18 台州北平机床有限公司 Grinding device for cutter slot
CN101804594B (en) * 2010-05-07 2013-05-01 台州北平机床有限公司 Grinding device for cutter slot

Also Published As

Publication number Publication date
FR2659260A1 (en) 1991-09-13
FR2659260B1 (en) 1994-04-15

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