EP0826461A1 - Grinding wheel with cooling means incorporated - Google Patents

Grinding wheel with cooling means incorporated Download PDF

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Publication number
EP0826461A1
EP0826461A1 EP97402012A EP97402012A EP0826461A1 EP 0826461 A1 EP0826461 A1 EP 0826461A1 EP 97402012 A EP97402012 A EP 97402012A EP 97402012 A EP97402012 A EP 97402012A EP 0826461 A1 EP0826461 A1 EP 0826461A1
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EP
European Patent Office
Prior art keywords
grinding wheel
abrasive
central
deposit
wheel according
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EP97402012A
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German (de)
French (fr)
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EP0826461B1 (en
Inventor
Henri Jean Denis Robichon
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Safran Aircraft Engines SAS
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Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
SNECMA SAS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with cooling provisions, e.g. with radial slots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with cooling provisions

Definitions

  • the invention relates to grinding wheels rectification used at the end of machining of parts generally metallic, in order to obtain parts with very precise dimensions and dimensions. She relates, in particular, to large-scale rectification speed and more specifically by means of grinding wheels cubic boron nitride, called “CBN grinding wheels”.
  • Abrasive wheels are used in the rectification to make the last passes of finishing, in order to bring the surfaces to be machined to a very precise rating and with a surface finish of optimal quality.
  • the grinding surface of the grinding wheel is consisting of a multitude of bonded abrasive grains and agglomerated by a binder.
  • the machining surface is set in rotation and the grains gradually machine the area. The movements of the grinding wheel and the shape of the surface determine the shape and quality of the final machined surface.
  • CBN wheels which are wheels where the abrasive material is cubic boron nitride, that is to say a “superabrasive” material, by opposition to aluminous abrasives and carbides of more conventional or conventional silicon.
  • a grinding wheel using this type abrasive does not contain grains of this type in all of its mass, but is generally made up of two parts that are a mount or a central support around which is placed an abrasive layer, called commonly known as "headband”.
  • This banner is the part active grinding wheel and is generally not permeable, that is, there are no pores in this part.
  • the frame can be of alloy light (AG5) or a mixture of aluminum powders and resin, commonly called “resaloy”, alloy dense, for example bronze or steel, or in material vitrified.
  • nitride grinding wheels of cubic boron are used for rectification of steel or alloy parts, the surface hardness is largely above the medium and in tool sharpening operations in high-alloy high-speed steel, or high-carbon steel.
  • grinding wheels of this type are used with very high rotational speeds, around 15,000 at 30,000 rpm.
  • German patent document DE-A-38 04781 describes, by its figure 3, a nitride grinding wheel cubic boron, whose abrasive profile is tapered, equipped with a circuit for watering the abrasive surface of the grinding wheel ending in several channels on this area.
  • the circuit includes radial holes which supply the abrasive surface with cooling liquid.
  • the achievement of these holes is problematic because it requires delicate machining.
  • the homogeneity of the distribution of the liquid over the entire width of the abrasive surface is not guaranteed.
  • the object of the invention is to remedy these disadvantages.
  • the distribution holes open, for example in an inclined manner, each in an external rib made in the deposit abrasive.
  • the ribs are preferably inclined to the central axis of the grinding wheel, the inclination of the ribs preferably being alternated.
  • Figure 1 shows all the elements of the grinding wheel according to the invention, that is to say mainly the body 1 which constitutes the largest part of the grinding wheel and the abrasive deposit 10 placed on the periphery of this one.
  • the peripheral surface 7 of the body 1 and the abrasive deposit 10 are shown with a shape cylindrical. This is just one of the many forms what can these two elements take, depending on the surface of the workpiece.
  • the body 1 has a central recess 5 by which it is fixed on a motor shaft training. It also has a cavity central 8 by which the coolant, the occurrence of water mixed with oil, happens.
  • a first solution consists in making arrive this coolant through the central recess 5, that is to say by the motor shaft.
  • Another solution consists in making the fluid arrive laterally by a lateral pipe 6 shown in lines interrupted.
  • Body 1 has two side chambers annular 2 of shallow depth and connected by central holes 4 at the central recess 5. These two side chambers 2, easily achievable by turning, are each closed by a tight cover 9 fixed on the body 1 without adjustment problem concentric. So the coolant coming in through the central recess 5 in the body 1 can penetrate in the two annular side chambers 2.
  • Distribution holes 3 are provided in the body 1. They lead both to the exterior of the annular lateral chambers 2 and on the peripheral surface 7 of the body 1, that is to say in the abrasive 10.
  • the distribution holes 3 have, at the top of this figure 1, have been shown opening into the same plane of cut to show that several holes in distribution can lead to the same generator the peripheral surface 7 of the body 1. This is a possibility, but does not correspond with achievement mentioned at the bottom of this figure 1 (uncut).
  • the abrasive 10 can have external grooves 11 placed next to the distribution holes 3. This allows the coolant to come out of the grinding wheel, the abrasive 10 not being porous. So the coolant can reach the entire surface external 12 of the abrasive, i.e. the surface of cutting of the grinding wheel, to ensure its functions watering and lubrication.
  • these distribution holes 3 are slightly tilted so that the fluid comes out in the direction opposite to the direction of rotation represented by the arrow.
  • the grinding wheel has been cut to show that the holes distribution 3 can lead into the grooves external 11, inclined to the radius of the grinding wheel, i.e. not perpendicular to the peripheral surface 7 of the body 1.
  • the grinding wheel according to the present invention allows, of course, to remove the sprinkler nozzles and lubrication and accessibility issues in the cutting area and also the problems of positioning. Distribution of coolant by the grinding wheel eliminates the possibility of thermal shocks linked to the delicate distribution of this coolant with a nozzle system, limiting thus the risk of local overheating of the grinding wheel. We also avoid power consumption additional on the drive spindle due to impacts of the coolant on the grinding wheel.
  • the main advantage is the ease of realization of the distribution circuit of coolant, not requiring precise or delicate machining to be carried out such as drilling very deep, weak pipes diameters.
  • the double arrival of the cooling on each side of the grinding wheel ensures watering which is evenly distributed and which provides optimal and consistent machining quality.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The correcting grinding wheel comprises a disc shaped body (1) with a central axis (A). An abrasive deposit (10) is stuck on the body peripheral surface (7). A spraying fluid supply circuit discharges onto the abrasive through several distributing holes (3) which issue from a lateral annular chamber (2). Two central drillings (4) each discharge into a central cavity (5) and into a lateral chamber. Two sealed covers (9) cover the annular chambers. The distributing holes (3) each emerge in an inclined external rib (11) into the abrasive deposit.

Description

Domaine de l'inventionField of the invention

L'invention concerne les meules de rectification utilisées en fin d'usinage de pièces généralement métalliques, dans le but d'obtenir des pièces aux cotes et dimensions très précises. Elle concerne, en particulier, la rectification à grande vitesse et plus spécialement au moyen de meules au nitrure de bore cubique, dénommées « meules CBN ».The invention relates to grinding wheels rectification used at the end of machining of parts generally metallic, in order to obtain parts with very precise dimensions and dimensions. She relates, in particular, to large-scale rectification speed and more specifically by means of grinding wheels cubic boron nitride, called “CBN grinding wheels”.

Domaine de l'invention et problème poséField of the invention and problem posed

Les meules abrasives sont utilisées dans la rectification pour effectuer les dernières passes de finition, dans le but de mettre les surfaces à usiner à une cote très précise et avec un état de surface de qualité optimale. La surface d'usinage de la meule est constituée d'une multitude de grains abrasifs collés et agglomérés par un liant. La surface d'usinage est mise en rotation et les grains usinent petit à petit la surface. Les mouvements de la meule et la forme de la surface déterminent la forme et la qualité de la surface usinée finale.Abrasive wheels are used in the rectification to make the last passes of finishing, in order to bring the surfaces to be machined to a very precise rating and with a surface finish of optimal quality. The grinding surface of the grinding wheel is consisting of a multitude of bonded abrasive grains and agglomerated by a binder. The machining surface is set in rotation and the grains gradually machine the area. The movements of the grinding wheel and the shape of the surface determine the shape and quality of the final machined surface.

On connaít un type spécifique de meules, appelées communément meules CBN, qui sont des meules où le matériau abrasif est du nitrure de bore cubique, c'est-à-dire un matériau « superabrasif », par opposition aux abrasifs alumineux et aux carbures de silicium plus classiques ou conventionnels. Compte tenu du prix élevé de cet abrasif qu'est le niture de bore cubique (de l'ordre de dix mille fois celui d'un abrasif classique), une meule utilisant ce type d'abrasif ne contient pas de grains de ce type dans toute sa masse, mais est généralement constituée de deux parties qui sont une monture ou un support central autour duquel est placée une couche abrasive, appelée communément « bandeau ». Ce bandeau est la partie active de la meule et n'est généralement pas perméable, c'est-à-dire qu'il n'y a pas de pores dans cette partie. On ajoute que la monture peut être en alliage léger (AG5) ou en un mélange de poudres d'aluminium et de résine, appelé communément « résaloy », en alliage dense, par exemple bronze ou acier, ou en matière vitrifiée.We know a specific type of grinding wheel, commonly called CBN wheels, which are wheels where the abrasive material is cubic boron nitride, that is to say a “superabrasive” material, by opposition to aluminous abrasives and carbides of more conventional or conventional silicon. Considering the high price of this abrasive that is boron niture cubic (of the order of ten thousand times that of a conventional abrasive), a grinding wheel using this type abrasive does not contain grains of this type in all of its mass, but is generally made up of two parts that are a mount or a central support around which is placed an abrasive layer, called commonly known as "headband". This banner is the part active grinding wheel and is generally not permeable, that is, there are no pores in this part. We add that the frame can be of alloy light (AG5) or a mixture of aluminum powders and resin, commonly called "resaloy", alloy dense, for example bronze or steel, or in material vitrified.

On précise que les meules au nitrure de bore cubique sont utilisées pour des travaux de rectification de pièces en acier ou en alliage dont la dureté superficielle est largement au-dessus de la moyenne et dans des opérations d'affûtage d'outils en acier rapide fortement allié, ou en acier surcarburé. De plus, les meules de ce type sont utilisées avec des vitesses de rotation très élevées, de l'ordre de 15000 à 30000 tours/minutes.It is specified that the nitride grinding wheels of cubic boron are used for rectification of steel or alloy parts, the surface hardness is largely above the medium and in tool sharpening operations in high-alloy high-speed steel, or high-carbon steel. In addition, grinding wheels of this type are used with very high rotational speeds, around 15,000 at 30,000 rpm.

Or, dans la plupart des opérations de rectification, il est nécessaire d'arroser abondamment l'usinage. Ceci permet d'évacuer la chaleur produite par le travail de meulage pour préserver partiellement la meule et la pièce des dégradations liées à une trop forte élévation de température, de nettoyer la surface de la meule, pour retarder le phénomène d'encrassement en entraínant les copeaux produits loin de la zone de travail, sert éventuellement d'agent anti-rouille et sert de lubrifiant en modifiant le coefficient de frottement entre la meule et la pièce.However, in most operations of rectification, it is necessary to water abundantly machining. This allows the heat produced to be removed by grinding work to partially preserve the grinding wheel and the part of degradations linked to too much sharp rise in temperature, to clean the surface of the grinding wheel, to delay the fouling phenomenon entraining the chips produced far from the area of work, possibly serves as an anti-rust agent and serves as a lubricant by changing the coefficient of friction between the grinding wheel and the workpiece.

Pour éviter l'emploi de tuyaux ou de buses débouchant aux alentours du point d'usinage de la meule, de préférence entre la meule et la surface à usiner et du matériel supplémentaire pour fixer le tuyau ou la buse d'arrosage sur la machine, on utilise des meules avec arrosage incorporé.To avoid the use of pipes or nozzles emerging around the machining point of the grinding wheel, preferably between the grinding wheel and the surface to machine and additional hardware to fix the hose or nozzle on the machine, we use grinding wheels with incorporated sprinkling.

Le document de brevet allemand DE-A-38 04781 décrit, par sa figure 3, une meule au nitrure de bore cubique, dont le profil abrasif est effilé, équipée d'un circuit d'arosage de la surface abrasive de la meule aboutissant par plusieurs canaux sur cette surface. On y trouve la présence de nervures externes pratiquées dans le dépôt abrasif, inclinées, de même que des perçages d'alimentation débouchant à la surface du dépôt de façon inclinée. Le circuit comporte des perçages radiaux qui alimentent la surface abrasive en liquide de refroidissement. Toutefois, la réalisation de ces perçages est problématique, car elle nécessite un usinage délicat. De plus, l'homogénéité de la répartition du liquide sur toute la largeur de la surface abrasive n'est pas assurée.German patent document DE-A-38 04781 describes, by its figure 3, a nitride grinding wheel cubic boron, whose abrasive profile is tapered, equipped with a circuit for watering the abrasive surface of the grinding wheel ending in several channels on this area. We find the presence of external ribs in the abrasive deposition, inclined, as well as feed holes opening to the surface of the deposit in an inclined manner. The circuit includes radial holes which supply the abrasive surface with cooling liquid. However, the achievement of these holes is problematic because it requires delicate machining. In addition, the homogeneity of the distribution of the liquid over the entire width of the abrasive surface is not guaranteed.

Le but de l'invention est de remédier à ces inconvénients.The object of the invention is to remedy these disadvantages.

Résumé de l'inventionSummary of the invention

A cet effet, l'objet principal de l'invention est une meule de rectification constituée :

  • d'un corps en forme de disque définissant un axe central ;
  • un dépôt abrasif collé à la surface périphérique du corps (1) ;
  • un circuit d'alimentation en fluide d'arrosage interne au corps et débouchant dans le dépôt abrasif au moyen de plusieurs perçages de répartition débouchant chacun dans une chambre latérale annulaire et dans le dépôt abrasif pour lubrifier la zone de coupe et refroidir la meule,
caractérisée en ce que le circuit d'alimentation en fluide d'arrosage comprend :
  • deux chambres latérales annulaires ;
  • au moins deux perçages centraux à partir du centre de la meule débouchant chacun dans une chambre latérale annulaire ;
  • plusieurs perçages de répartition à partir de chacune des chambres latérales annulaires et débouchant dans le dépôt abrasif ; et
  • deux couvercles étanches recouvrant les chambres latérales annulaires.
To this end, the main object of the invention is a grinding wheel consisting of:
  • a disc-shaped body defining a central axis;
  • an abrasive deposit bonded to the peripheral surface of the body (1);
  • a watering fluid supply circuit internal to the body and opening into the abrasive deposit by means of several distribution bores each opening into an annular lateral chamber and into the abrasive deposit to lubricate the cutting area and cool the grinding wheel,
characterized in that the coolant supply circuit comprises:
  • two annular side chambers;
  • at least two central holes from the center of the grinding wheel, each opening into an annular lateral chamber;
  • several distribution bores from each of the annular lateral chambers and opening into the abrasive deposit; and
  • two watertight covers covering the annular lateral chambers.

De préférence, les perçages de répartition débouchent, par exemple de manière inclinée, chacun dans une nervure externe pratiquée dans le dépôt abrasif.Preferably, the distribution holes open, for example in an inclined manner, each in an external rib made in the deposit abrasive.

Dans ce cas, les nervures sont de préférence inclinées par rapport à l'axe central de la meule, l'inclinaison des nervures étant de préférence alternée.In this case, the ribs are preferably inclined to the central axis of the grinding wheel, the inclination of the ribs preferably being alternated.

On peut envisager que plusieurs perçages de répartition débouchent dans une même nervure externe.We can envisage that several holes of distribution open into the same external rib.

Liste des figuresList of Figures

L'invention et ses différentes caractéristiques techniques seront mieux comprises à la lecture de la description suivante, accompagnée de deux figures représentant respectivement :

  • figure 1, en vue frontale partiellement coupée, la meule selon l'invention ; et
  • figure 2, en demi-vue latérale, la meule selon l'invention.
The invention and its various technical characteristics will be better understood on reading the following description, accompanied by two figures representing respectively:
  • Figure 1, in partially cut front view, the grinding wheel according to the invention; and
  • Figure 2, in half side view, the grinding wheel according to the invention.

Description détaillée d'une réalisation de l'inventionDetailed description of a realization of the invention

La figure 1 montre tous les éléments de la meule selon l'invention, c'est-à-dire principalement le corps 1 qui constitue la plus grande partie de la meule et le dépôt abrasif 10 placé à la périphérie de celui-ci. La surface périphérique 7 du corps 1 et le dépôt abrasif 10 sont représentés avec une forme cylindrique. Ceci n'étant qu'une des nombreuses formes que peuvent prendre ces deux éléments, en fonction de la surface de la pièce à usiner.Figure 1 shows all the elements of the grinding wheel according to the invention, that is to say mainly the body 1 which constitutes the largest part of the grinding wheel and the abrasive deposit 10 placed on the periphery of this one. The peripheral surface 7 of the body 1 and the abrasive deposit 10 are shown with a shape cylindrical. This is just one of the many forms what can these two elements take, depending on the surface of the workpiece.

Le corps 1 possède un évidement central 5 par lequel il est fixé sur un arbre moteur d'entraínement. Il possède également une cavité centrale 8 par laquelle le fluide d'arrosage, en l'occurrence de l'eau mélangée à de l'huile, arrive. Une première solution consiste à faire arriver ce fluide d'arrosage par l'évidement central 5, c'est-à-dire par l'arbre moteur. Une autre solution consiste à faire arriver le fluide latéralement par une canalisation latérale 6 représentée en traits interrompus.The body 1 has a central recess 5 by which it is fixed on a motor shaft training. It also has a cavity central 8 by which the coolant, the occurrence of water mixed with oil, happens. A first solution consists in making arrive this coolant through the central recess 5, that is to say by the motor shaft. Another solution consists in making the fluid arrive laterally by a lateral pipe 6 shown in lines interrupted.

Le corps 1 possède deux chambres latérales annulaires 2 de faible profondeur et reliées par des perçages centraux 4 à l'évidement central 5. Ces deux chambres latérales 2, facilement réalisables par tournage, sont fermées chacune par un couvercle étanche 9 fixé sur le corps 1 sans problème d'ajustement concentrique. Ainsi, le fluide d'arrosage arrivant par l'évidement central 5 dans le corps 1 peut pénétrer dans les deux chambres latérales annulaires 2.Body 1 has two side chambers annular 2 of shallow depth and connected by central holes 4 at the central recess 5. These two side chambers 2, easily achievable by turning, are each closed by a tight cover 9 fixed on the body 1 without adjustment problem concentric. So the coolant coming in through the central recess 5 in the body 1 can penetrate in the two annular side chambers 2.

Des perçages de répartition 3 sont prévus dans le corps 1. Ils débouchent à la fois sur l'extérieur des chambres latérales annulaires 2 et sur la surface périphérique 7 du corps 1, c'est-à-dire dans l'abrasif 10. Sur cet exemple de réalisation 4, les perçages de répartition 3 ont, en haut de cette figure 1, été représentés débouchant dans le même plan de coupe pour montrer que plusieurs perçages de répartition peuvent aboutir sur la même génératrice de la surface périphérique 7 du corps 1. Ceci est une possibilité, mais ne correspond pas avec la réalisation évoquée dans le bas de cette figure 1 (non coupée).Distribution holes 3 are provided in the body 1. They lead both to the exterior of the annular lateral chambers 2 and on the peripheral surface 7 of the body 1, that is to say in the abrasive 10. In this exemplary embodiment 4, the distribution holes 3 have, at the top of this figure 1, have been shown opening into the same plane of cut to show that several holes in distribution can lead to the same generator the peripheral surface 7 of the body 1. This is a possibility, but does not correspond with achievement mentioned at the bottom of this figure 1 (uncut).

En référence à la figure 2, on constate que l'abrasif 10 peut posséder des rainures externes 11 placées en regard des perçages de répartition 3. Ceci permet que le fluide d'arrosage puisse sortir de la meule, l'abrasif 10 n'étant pas poreux. Ainsi, le fluide d'arrosage peut atteindre toute la surface externe 12 de l'abrasif, c'est-à-dire la surface de coupe de la meule, pour assurer ses fonctions d'arrosage et de lubrification. Sur cette même figure 2, on constate que ces perçages de répartition 3 sont légèrement inclinés pour que le fluide sorte dans la direction opposée au sens de rotation représenté par la flèche.Referring to Figure 2, we see that the abrasive 10 can have external grooves 11 placed next to the distribution holes 3. This allows the coolant to come out of the grinding wheel, the abrasive 10 not being porous. So the coolant can reach the entire surface external 12 of the abrasive, i.e. the surface of cutting of the grinding wheel, to ensure its functions watering and lubrication. On this same figure 2, we see that these distribution holes 3 are slightly tilted so that the fluid comes out in the direction opposite to the direction of rotation represented by the arrow.

En revenant à la figure 1, on constate que les rainures externes 11 sont inclinées par rapport à l'axe de rotation A de la meule. Ceci permet de mieux répartir le fluide d'arrosage sur toute la largeur de la meule. Les rainures externes 11 sont inclinées en alternance pour que cette répartition du fluide soit la plus uniforme possible. Sur la figure 2, a été représentée une bride de fixation 14 pour symboliser les moyens de fixation de la meule sur l'arbre moteur.Returning to Figure 1, we see that the external grooves 11 are inclined relative to the axis of rotation A of the grinding wheel. This allows better distribute the coolant over the entire width of the wheel. The external grooves 11 are inclined at alternation so that this distribution of the fluid is the as uniform as possible. In Figure 2, has been shown a mounting flange 14 to symbolize the means of fixing the grinding wheel on the motor shaft.

Dans la partie inférieure de cette figure 2, la meule a été coupée pour montrer que les perçages de répartition 3 peuvent déboucher dans les rainures externes 11, de façon inclinée par rapport au rayon de la meule, c'est-à-dire pas perpendiculairement à la surface périphérique 7 du corps 1.In the lower part of this figure 2, the grinding wheel has been cut to show that the holes distribution 3 can lead into the grooves external 11, inclined to the radius of the grinding wheel, i.e. not perpendicular to the peripheral surface 7 of the body 1.

Avantages de l'inventionAdvantages of the invention

La meule selon la présente invention permet, bien entendu, de supprimer les buses d'arrosage et de lubrification et les problèmes d'accessibilité dans la zone de coupe et également les problèmes de positionnement. La distribution du fluide d'arrosage par la meule permet de supprimer l'éventualité des chocs thermiques liés à la répartition délicate de ce fluide d'arrosage avec un système de buse, limitant ainsi les risques de surchauffes locales de la meule. On évite également la consommation de puissance supplémentaire sur la broche d'entraínement due aux impacts du fluide d'arrosage sur la meule.The grinding wheel according to the present invention allows, of course, to remove the sprinkler nozzles and lubrication and accessibility issues in the cutting area and also the problems of positioning. Distribution of coolant by the grinding wheel eliminates the possibility of thermal shocks linked to the delicate distribution of this coolant with a nozzle system, limiting thus the risk of local overheating of the grinding wheel. We also avoid power consumption additional on the drive spindle due to impacts of the coolant on the grinding wheel.

L'avantage principal réside dans la facilité de réalisation du circuit de distribution du liquide de refroidissement, ne nécessitant pas d'usinages précis ou délicat à réaliser tel que le perçage de très profondes canalisations de faibles diamètres.The main advantage is the ease of realization of the distribution circuit of coolant, not requiring precise or delicate machining to be carried out such as drilling very deep, weak pipes diameters.

De plus, la double arrivée du liquide de refroidissement de chaque côté de la meule assure un arrosage qui est réparti de manière homogène et qui apporte une qualité d'usinage optimale et constante.In addition, the double arrival of the cooling on each side of the grinding wheel ensures watering which is evenly distributed and which provides optimal and consistent machining quality.

Claims (6)

Meule de rectification comprenant :
un corps (1) en forme de disque définissant un axe central (A) ; un dépôt abrasif (10) collé à la surface périphérique (7) du corps (1) ; un circuit d'alimentation en fluide d'arrosage interne au corps (1) et débouchant dans le dépôt abrasif (10) au moyen de plusieurs perçages de répartition (3) débouchant chacun dans une chambre latérale annulaire (2) et dans le dépôt abrasif (10) pour lubrifier la zone de coupe et refroidir la meule, caractérisée en ce que le circuit d'alimentation en fluide d'arrosage comprend : deux chambres latérales annulaires (2) ; au moins deux perçages centraux (4) débouchant chacun dans un évidement central (5) et dans une chambre latérale annulaire (2) ; deux couvercles étanches (9) recouvrant les chambres latérales annulaires (2). Grinding wheel including:
a disc-shaped body (1) defining a central axis (A); an abrasive deposit (10) bonded to the peripheral surface (7) of the body (1); a watering fluid supply circuit internal to the body (1) and opening into the abrasive deposit (10) by means of several distribution bores (3) each opening into an annular lateral chamber (2) and into the abrasive deposit (10) to lubricate the cutting area and cool the grinding wheel, characterized in that the coolant supply circuit comprises: two annular side chambers (2); at least two central bores (4) each opening into a central recess (5) and into an annular lateral chamber (2); two tight covers (9) covering the annular lateral chambers (2). Meule selon la revendication 1, caractérisée en ce que les perçages de répartition (3) débouchent chacun dans une nervure externe (11) pratiquée dans le dépôt abrasif (10).Grinding wheel according to claim 1, characterized in what the distribution holes (3) lead to each in an external rib (11) formed in the abrasive deposit (10). Meule selon la revendication 2, caractérisée en ce que les nervures externes (11) sont inclinées par rapport à l'axe central (A) de la meule.Grinding wheel according to claim 2, characterized in that the outer ribs (11) are inclined by relative to the central axis (A) of the grinding wheel. Meule selon la revendication 3, caractérisée en ce que les nervures (11) sont inclinées en alternance. Grinding wheel according to claim 3, characterized in that the ribs (11) are inclined alternately. Meule selon la revendication 2, caractérisée en ce que plusieurs perçages de répartition (3) débouchent dans une même nervure externe (11).Grinding wheel according to claim 2, characterized in what several distribution holes (3) lead to in the same external rib (11). Meule selon la revendication 2, caractérisé en ce que les perçages de répartition débouchent de façon inclinée dans les nervures externes (11).Grinding wheel according to claim 2, characterized in what the distribution bores open so inclined in the outer ribs (11).
EP97402012A 1996-08-29 1997-08-28 Grinding wheel with cooling means incorporated Expired - Lifetime EP0826461B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9610553 1996-08-29
FR9610553A FR2752762B1 (en) 1996-08-29 1996-08-29 GRINDING WHEEL WITH BUILT-IN WATERING

Publications (2)

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EP0826461A1 true EP0826461A1 (en) 1998-03-04
EP0826461B1 EP0826461B1 (en) 2001-09-19

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US (1) US5846125A (en)
EP (1) EP0826461B1 (en)
CA (1) CA2213060C (en)
DE (1) DE69706789T2 (en)
FR (1) FR2752762B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1319469B1 (en) * 2001-12-14 2007-03-07 United Technologies Corporation Grinding Wheels

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2793181B1 (en) 1999-05-06 2001-06-22 Snecma GRINDING WHEEL AND LATERAL LUBRICATION SYSTEM
EP1328378A1 (en) * 2000-10-20 2003-07-23 Makino Inc. Machining device for machining a surface of a workpiece and method therefore
AT413959B (en) * 2002-12-05 2006-07-15 Schrottner Gerhard WHEEL
US7052379B2 (en) * 2002-12-27 2006-05-30 General Electric Company Methods and apparatus for machining a coupling
EP1486289A3 (en) * 2003-06-12 2005-03-09 Koyo Seiko Co., Ltd. Method of processing antifriction bearing unit for wheel
AT414105B (en) * 2003-09-04 2006-09-15 Schrottner Gerhard COVER FOR MEDIUM GUIDANCE ON GRINDING WHEELS
AT502503B1 (en) * 2003-09-04 2007-04-15 Schrottner Gerhard RING SYSTEM FOR MEDIUM GUIDANCE ON GRINDING WHEELS
US20050064799A1 (en) * 2003-09-24 2005-03-24 Inland Diamond Products Company Ophthalmic roughing wheel
CA2545186A1 (en) * 2003-11-07 2005-05-19 James Hardie International Finance B.V. A cutting tool
DE50309740D1 (en) * 2003-11-12 2008-06-12 Erwin Junker Grinding Technolo Shared grinding tool
WO2005084889A1 (en) * 2004-03-10 2005-09-15 Cristales Instillables De Mexico, S.A. De C.V. Device for polishing the edge of a glass sheet
US8151783B2 (en) * 2005-06-27 2012-04-10 Husqvarna Outdoor Products Inc. Tools and methods for making and using tools, blades and methods of making and using blades
US20080051013A1 (en) * 2006-04-05 2008-02-28 Burgess Greg M Methods and apparatus for machining a coupling
JP5034427B2 (en) * 2006-10-12 2012-09-26 株式会社ジェイテクト Method for releasing dynamic pressure of grinding fluid in grinding, grinding method using the method, and grinding wheel used in the grinding method
US8231431B2 (en) * 2008-01-24 2012-07-31 Applied Materials, Inc. Solar panel edge deletion module
JP5167920B2 (en) * 2008-04-11 2013-03-21 株式会社ジェイテクト Grinding machine and grinding method
ITPD20080237A1 (en) * 2008-07-31 2010-02-01 Adi S P A MOLA, PARTICULARLY FOR MILLING PROCESSES WITH HIGH SPEED @ ADVANCEMENT
US20110126961A1 (en) 2009-12-02 2011-06-02 Bridgestone Bandag, Llc Passive buffer brush air cooling
KR101415159B1 (en) * 2010-12-06 2014-07-04 코마츠 엔티씨 가부시끼가이샤 Grinding wheel
US8597079B2 (en) * 2011-01-07 2013-12-03 Inland Diamond Products Company Abrasive wheel with closed profiles in cutting surface
WO2013107339A1 (en) * 2012-01-17 2013-07-25 桂林创源金刚石有限公司 Highly efficient cutting and grinding wheel designed to retain its shape
US20210323123A1 (en) * 2012-01-17 2021-10-21 Guilin Champion Union Diamond Co., Ltd. Manufacturing method for grinding wheel and grinding method for grinding workpiece using grinding wheel
FI10500U1 (en) * 2013-02-26 2014-05-27 Nurmeksen Työstö Ja Tarvike Oy stone Saw
JP6209081B2 (en) * 2013-12-25 2017-10-04 三菱重工工作機械株式会社 Whetstone tool
EP2929967B1 (en) * 2014-04-11 2017-02-01 Sandvik Intellectual Property AB A slot milling disc and a rotatable mounting shaft for such a milling disc
EP3274129A1 (en) * 2015-03-25 2018-01-31 Ancora S.p.A. Head for polishing ceramic items or natural stones
PL3600771T3 (en) * 2017-03-31 2022-06-20 B & J Rocket Sales Ag Improved abrading wheel
JP6817161B2 (en) * 2017-07-07 2021-01-20 三菱重工業株式会社 Grinding wheel and manufacturing method of grinding wheel
AT17877U1 (en) * 2018-03-12 2023-06-15 Tyrolit Schleifmittelwerke Swarovski Ag & Co K G Grinding tool for grinding an engine block
CN108326764A (en) * 2018-05-03 2018-07-27 西安增材制造国家研究院有限公司 Spray lubricating fluid grinding wheel and the grinding attachment including the grinding wheel in electroplating surface abrasive material
EP3999280A1 (en) * 2019-07-15 2022-05-25 3M Innovative Properties Company Abrasive articles having internal coolant features and methods of manufacturing the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE500485C (en) * 1930-06-21 Herbert Lindner Device for supplying the cooling water for grinding wheels to the grinding point from the hub through the pores of the grinding wheel
DE3804781A1 (en) * 1987-02-28 1989-06-01 Zahnradfabrik Friedrichshafen Abrasive wheel
EP0483561A1 (en) * 1990-10-31 1992-05-06 Eaton Corporation Machining method and apparatus
EP0505615A1 (en) * 1991-03-23 1992-09-30 Ernst Winter & Sohn (Gmbh & Co.) Grinding wheel
US5423717A (en) * 1993-10-04 1995-06-13 Ford Motor Company Grinding wheel assembly

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776527A (en) * 1954-10-05 1957-01-08 Pittsburgh Plate Glass Co Apparatus for grinding glass
BE547473A (en) * 1955-05-03
US3517462A (en) * 1968-02-01 1970-06-30 Usm Corp Reducing and roughing tools
US5076024A (en) * 1990-08-24 1991-12-31 Intelmatec Corporation Disk polisher assembly
US5499943A (en) * 1994-11-25 1996-03-19 Terris; Alta F. Rotary cutter blade sharpener
US5582540A (en) * 1996-01-22 1996-12-10 National Science Council Of R.O.C Hydrostatic and hydrodynamic polishing tool
US5681216A (en) * 1996-02-06 1997-10-28 Elantec, Inc. High precision polishing tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE500485C (en) * 1930-06-21 Herbert Lindner Device for supplying the cooling water for grinding wheels to the grinding point from the hub through the pores of the grinding wheel
DE3804781A1 (en) * 1987-02-28 1989-06-01 Zahnradfabrik Friedrichshafen Abrasive wheel
EP0483561A1 (en) * 1990-10-31 1992-05-06 Eaton Corporation Machining method and apparatus
EP0505615A1 (en) * 1991-03-23 1992-09-30 Ernst Winter & Sohn (Gmbh & Co.) Grinding wheel
US5423717A (en) * 1993-10-04 1995-06-13 Ford Motor Company Grinding wheel assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1319469B1 (en) * 2001-12-14 2007-03-07 United Technologies Corporation Grinding Wheels

Also Published As

Publication number Publication date
CA2213060A1 (en) 1998-02-28
FR2752762A1 (en) 1998-03-06
CA2213060C (en) 2005-11-08
US5846125A (en) 1998-12-08
FR2752762B1 (en) 1998-10-02
DE69706789T2 (en) 2002-05-23
EP0826461B1 (en) 2001-09-19
DE69706789D1 (en) 2001-10-25

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