EP0196941B1 - Device for surfacing or polishing the vertical edge of a stone or a solid prefabricated element - Google Patents

Device for surfacing or polishing the vertical edge of a stone or a solid prefabricated element Download PDF

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Publication number
EP0196941B1
EP0196941B1 EP19860400430 EP86400430A EP0196941B1 EP 0196941 B1 EP0196941 B1 EP 0196941B1 EP 19860400430 EP19860400430 EP 19860400430 EP 86400430 A EP86400430 A EP 86400430A EP 0196941 B1 EP0196941 B1 EP 0196941B1
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EP
European Patent Office
Prior art keywords
spindle
stone
vertical
polishing
grinding
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Expired
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EP19860400430
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German (de)
French (fr)
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EP0196941A1 (en
Inventor
Bernard Thibaut
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Thibaut SA
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Thibaut SA
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Publication of EP0196941A1 publication Critical patent/EP0196941A1/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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces

Definitions

  • the present invention relates to a device allowing careful surfacing and polishing of the side or edge, generally vertical, of a solid piece or prefabricated element, extending horizontally and laid flat on a suitable support.
  • the lateral edge of a stone placed flat like a slab or a stele, generally presents itself vertically and offers a contour which, depending on the intended use, can include a profile with straight parts, concave or convex with variable and more or less complex curvatures depending on the intended use for the stone to be worked.
  • the surfacing and then the polishing thereof are carried out by means of generally cylindrical wheels, called roller wheels, fixed at the end of a vertical rotary spindle carried by a manual or automatic machine.
  • the process implemented in the machines for surfacing and polishing stones or solid prefabricated elements laid flat consists after a preliminary work of the stones by the grinding wheels with rollers driven in rotation around a vertical axis until '' at an acceptable grain size for these grinding stones, turn the stone 90 ° to bring it into a vertical plane and finish polishing its lateral surface using another type of grinding stone with a flat working face arranged at right angles to the vertical axis of rotation, this working face being intended to be applied flat on the edge of the stone, which then extends horizontally.
  • this solution has the disadvantage of requiring a rocking of the stone to bring it from its horizontal position where it is laid flat, in a vertical position, which requires difficult handling, often delicate to implement without risk for the stone itself and which, in any case, considerably strain the cost price of the operation.
  • polishing machines comprising grinding wheels whose flat working face is arranged vertically and could therefore be applied flat against the vertical edge of a stone placed flat.
  • This is the case for example in the machine according to FR 1 422 266.
  • a machine of this kind cannot be used for the type of work to which the subject of the invention relates, that is to say finishing the polishing of the edge of a stone laid flat using the same machine as that used initially for the roughing of this polishing with roller-grinders with vertical axis.
  • the machine according to FR 1 422 266 is very complex and unsuitable for the work envisaged. In addition, it cannot be used for polishing a curved profile edge.
  • Japanese patent publication JP 59 134 655 relates to a device for polishing a vertical surface, which is adaptable to the vertical shaft of a polishing machine.
  • This device comprises a grinding wheel placed in a vertical plane and the horizontal shaft of which is carried by a support capable of being suspended from the vertical spindle of a polishing machine.
  • this device is relatively complicated and moreover it only allows the work of a vertical surface. This device cannot therefore be used for polishing edges with a certain inclination.
  • the present invention aims to achieve a device of very simple design, capable of being adapted on the vertical spindle of a polishing machine and which is able to allow both to polish the inclined edge or the vertical edge of a stone or other piece to be polished.
  • the invention relates to a device adaptable to the spindle with a vertical axis of a polishing machine, and which is intended to allow the surfacing and polishing of the edge of a stone or of a solid prefabricated element placed flat, by means of a rotating grinding wheel, the working face of which is arranged vertically, while the support of its horizontal drive shaft is suspended from the spindle with a vertical axis of the corresponding polishing machine, leaving this spindle free to rotate to allow the vertical working face of the grinding wheel to orient itself in relation to the edge of the stone or other material to be polished, the arrangement being such that the median wear line of the working face of the grinding wheel is arranged in a plane passing through the vertical axis of the spindle of the machine on which this device is adapted, characterized in that the support of the horizontal shaft of the grinding wheel consists of a housing also carrying the motor training ent of this shaft, and this housing is suspended from a support associated with the rotary spindle with a vertical axis of the corresponding
  • the whole of the present device can rotate around the vertical axis of the spindle of the machine on which this device is adapted. Consequently, when the grinding wheel is in pressure contact with the edge of the polishing stone, it follows exactly the outline outlined, whatever its profile and in particular the succession of straight, concave or convex parts that it present.
  • the reference 1 designates as a whole, a device to allow the surfacing and polishing of the lateral vertical edge of a stone or a similar prefabricated element (not shown), placed flat on the support of a machining machine of a type known per se.
  • This machine comprises in particular a vertical spindle mounted for rotation about an axis shown in the drawing under reference 2, the device with its flange 3 being screwed onto the spindle with vertical axis 2 of the machine.
  • the device 1 mounted under the vertical axis 2 of the spindle is mainly composed of a vertical transmission axis 4 mounted inside a main housing 5 comprising two parts which, in the embodiment illustrated in the figure , are designated under the references 5a and 5b and extend substantially perpendicular to each other.
  • the shaft 4 arranged along the vertical axis 2 of the spindle is rotatably mounted with the latter inside the part 5a of the housing on ball bearings such as 6 and 7.
  • the shaft 4 comprises a nozzle 8 on which a conical pinion 9 is immobilized, blocked at the end by an axial stop key 10.
  • the bevel gear 9 is designed to cooperate with a second bevel gear 11, fixed on the end piece 12 of a horizontal axis 13, extending inside the second part 5b of the housing 5, this shaft 13 having its horizontal axis and therefore perpendicular to axis 2 of the drive spindle.
  • the horizontal shaft 13 is rotatably mounted inside the housing 5b on bearings 14 and 15 and has at its opposite end outside the housing a head 16 on which can be immobilized, by means in themselves conventional , a cup wheel 17 whose figure schematically illustrates the profile.
  • the horizontal axis 13 has an axial bore 18 to which is connected a rotary connector 19, itself connected to a central water supply (not shown) for injecting from the inside of the axis 13 towards the cup wheel 17 the water necessary for the lubrication of this wheel during its use for surfacing and polishing the stone to be worked.
  • FIG. 1 the cup wheel 17 of a type which is itself perfectly known, is shown with a dotted transverse line 20, schematically showing on average the zone of attack of the wheel on the edge of the stone to be machined according to the wear of this grinding wheel during use.
  • the dotted line 20 of the grinding wheel is located at a distance designated in the drawing by the reference L with respect to the vertical axis of the rotary spindle driving the entire mechanism and in particular carrying out the rotation of the mold plug 17 via its support shaft 13 thanks to the bevel gear system 9 and 10.
  • the distance L is reduced as much as possible so as to avoid the overhang of the grinding wheel relative to the axis of the rotary spindle.
  • these provisions result in transmitting to the wheel a certain inertia due to the rotation of the axis.
  • the grinding wheel 17 tends to undergo a certain movement of oscillation with respect to the edge of the stone relative to its axis or else to "dig" slightly as the its displacement on the song of the stone.
  • a first solution may consist in mounting around the housing 5 carrying the latter a counterweight or stabilizing springs limiting to some extent the effect inertial drive of the housing.
  • FIG. 2 illustrates another embodiment of the device according to the invention which makes it possible to eliminate more effectively during use the oscillation effect of the grinding wheel and the drawbacks that it may present for machining and the perfect surfacing of the edge of the stone to be worked.
  • This solution consists in avoiding any overhang of the grinding wheel with respect to the axis of rotation of the spindle, by reducing to zero the value of the distance 1 provided for in the first embodiment.
  • the device under consideration which for the whole takes up the mechanical arrangements implemented in the first example, comprises an additional housing 21 interposed between the vertical axis of rotation 2 of the spindle and the body of the main housing 5.
  • a this effect the axis 2 of the spindle drives inside the housing 21 a vertical intermediate shaft 22 on which is immobilized a straight pinion 23 meshing itself with a pinion 3 of the same diameter 24 immobilized on the axis 4 mounted at the interior of part 5a of the housing 5.
  • the dotted line 20, representing the average attack face of the cup wheel 17 against the edge of the stone to be surfaced and polished according to the wear of this wheel is located substantially in the vertical axis. 2 spindle rotation, which eliminates the cantilever effect noted previously.
  • this variant there still remains the inertia effect created by the rotation of the spindle and makes it useful to maintain a counterweight or springs on the main housing of the device making it possible to improve the stability of the assembly.
  • the vertical axis of the spindle 2 no longer directly controls the driving movement of the horizontal shaft of the cup wheel.
  • the spindle with vertical axis 2 is associated with a support 25 under which is fixed a console 26 by means of an immobilizing flange 27.
  • the main housing 28 At the opposite end of the support 26 is mounted the main housing 28 inside which extends horizontally a horizontal drive shaft 29, guided in the housing on bearings such as 30 and 31.
  • the shaft 29 At one of its ends, the shaft 29 is directly connected to a hydraulic motor or similar 32 and has at its opposite end a head 33 on which is fixed a cup wheel 34, the median wear line shown diagrammatically under the reference 35 is substantially arranged in the plane of the vertical axis 2 of the spindle.
  • the spindle of the machine is thus left free to rotate in order to allow the face of the cup wheel to orient itself relative to the edge of the stone laid flat which should be planed and polished.
  • the assembly produced is very simple and quick to assemble, requiring only its adaptation to the rotary spindle 2 and its fixing in the manner of a tool chuck. It should be noted that the design of the device in this third variant of embodiment makes it possible to easily adjust the position of the grinding wheel relative to the edge of the stone to be surfaced and polished in order to obtain a better hold of the assembly when the grinding wheel is moving. in pressure on the concav or convex forms of the song of this stone.
  • FIG. 4 represents another variant derived from that of FIG. 3.
  • This other variant differs from the previous one in that the corresponding main housing 28a, inside which the drive shaft 29a extends, is attached to the corresponding support 25a via an articulated connection device.
  • This device comprises an arm 26a secured to the support 25a and a plate 26b secured to the housing 28a. These two parts are articulated around a common axis 36.
  • the arm 26a carries a finger 37 engaged in a slot 38 in the form of an arc of a circle formed in the plate 26b, this finger carrying itself a locking nut provided an operating lever 39.
  • the arrangement of the device also remains the same as in the variant according to FIG. 3.
  • the support 25a is also arranged to be associated with the drive spindle 2 under the same conditions as above.
  • the shaft of the grinding wheel 34a it is mounted in the housing 28a in the same way and its drive is ensured by a hydraulic motor 32a, or the like, the housing of which is fixed on the end of the housing 28a which is opposite to the wheel 34a.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

La présente invention est relative à un dispositif permettant le surfaçage et le polissage soigné du côté ou chant, généralement vertical, d'une pièce ou d'un élément préfabriqué massif, s'étendant horizontalement et posé à plat sur un support approprié.The present invention relates to a device allowing careful surfacing and polishing of the side or edge, generally vertical, of a solid piece or prefabricated element, extending horizontally and laid flat on a suitable support.

On sait que le bord latéral d'une pierre posée à plat, du genre d'une dalle ou d'une stèle, se présente généralement verticalement et offre un contour qui selon l'usage prévu, peut comporter un profil avec des parties droites, concaves ou convexes de courbures variables et plus ou moins complexes selon l'usage envisagé pour la pierre à travailler. Le surfaçage puis le polissage de celle-ci s'effectuent au moyen de meules de forme générale cylindrique, dites meules rouleaux, fixées en bout d'une broche rotative verticale portée par une machine manuelle ou automatique.We know that the lateral edge of a stone placed flat, like a slab or a stele, generally presents itself vertically and offers a contour which, depending on the intended use, can include a profile with straight parts, concave or convex with variable and more or less complex curvatures depending on the intended use for the stone to be worked. The surfacing and then the polishing thereof are carried out by means of generally cylindrical wheels, called roller wheels, fixed at the end of a vertical rotary spindle carried by a manual or automatic machine.

Or pour obtenir sur le chant vertical de la pierre un polissage final acceptable, il est habituellement nécessaire d'utiliser successivement cinq meules dont le grain, diamanté ou en carborundum, est dégressif. Cependant, avec ce type de meules à rouleaux, il s'avère que l'opération de polissage ne permet guère d'aller au-delà de l'utilisation de la troisième taille de grain, les meules correspondantes, travaillant avec leur périphérie, étant au contact du chant de la pierre selon une génératrice verticale et ayant tendance à se déformer, nonobstant un balayage vertical parallèlement à l'axe de la broche rotative dont elles peuvent être animées. Il en résulte que le polissage final est insuffisant, avec un état de surface imparfait et au total la formation dans le chant de la pierre de facettes successives et non pas d'une surface dont la courbure ne présente aucune discontinuité.However, to obtain an acceptable final polishing on the vertical edge of the stone, it is usually necessary to successively use five grinding stones, the grain of which, diamond or carborundum, is decreasing. However, with this type of roller wheel, it turns out that the polishing operation hardly allows to go beyond the use of the third grain size, the corresponding wheels, working with their periphery, being in contact with the edge of the stone according to a vertical generator and having a tendency to deform, notwithstanding a vertical sweep parallel to the axis of the rotary spindle with which they can be animated. As a result, the final polishing is insufficient, with an imperfect surface condition and in total the formation in the song of the stone of successive facets and not of a surface whose curvature has no discontinuity.

Pour pallier cet inconvénient, le processus mis en oeuvre dans les machines de surfaçage et de polissage de pierres ou éléments préfabriqués massifs posés à plat, consiste après un travail préalable des pierres par les meules à rouleaux entraînées en rotation autour d'un axe vertical jusqu'à une taille de grain acceptable pour ces meules, à retourner la pierre de 90° pour l'amener dans un plan vertical et à finir le polissage de sa surface latérale au moyen d'un autre type de meule comportant une face plate de travail disposée à angle droit par rapport à l'axe vertical de rotation, cette face de travail étant destinée à être appliquée à plat sur le chant de la pierre, lequel s'étend alors à l'horizontale.To overcome this drawback, the process implemented in the machines for surfacing and polishing stones or solid prefabricated elements laid flat, consists after a preliminary work of the stones by the grinding wheels with rollers driven in rotation around a vertical axis until '' at an acceptable grain size for these grinding stones, turn the stone 90 ° to bring it into a vertical plane and finish polishing its lateral surface using another type of grinding stone with a flat working face arranged at right angles to the vertical axis of rotation, this working face being intended to be applied flat on the edge of the stone, which then extends horizontally.

Outre l'utilisation indispensable d'un cardan pour le montage d'une telle meule sous la broche rotative de la machine, qui permet à cette meule la liberté de mouvement indispensable, cette solution présente le désavantage d'exiger un basculement de la pierre pour l'amener de sa position horizontale où elle est posée à plat, en une position verticale, ce qui exige des manutentions difficiles, souvent délicates à mettre en oeuvre sans risque pour la pierre elle-même et qui, de toute façon, grèvent considérablement le prix de revient de l'opération.In addition to the essential use of a gimbal for mounting such a grinding wheel under the rotating spindle of the machine, which allows this grinding wheel the necessary freedom of movement, this solution has the disadvantage of requiring a rocking of the stone to bring it from its horizontal position where it is laid flat, in a vertical position, which requires difficult handling, often delicate to implement without risk for the stone itself and which, in any case, considerably strain the cost price of the operation.

Il est vrai qu'il existe des machines de polissage comportant des meules dont la face plate de travail est disposée verticalement et pourrait donc être appliquée à plat contre le chant vertical d'une pierre disposée à plat. Ceci est le cas par exemple dans la machine selon le FR 1 422 266. Toutefois une machine de ce genre ne peut pas être utilisée pour le type de travail auquel se rapporte l'objet de l'invention, c'est-à-dire la finition du polissage du chant d'une pierre posée à plat en utilisant la même machine que celle employée initialement pour l'ébauche de ce polissage avec des meules-rouleaux à axe vertical. Du reste, la machine selon le FR 1 422 266 est très complexe et inapte au travail envisagé. De plus, elle ne peut pas être employée pour le polissage d'un chant à profil courbe.It is true that there are polishing machines comprising grinding wheels whose flat working face is arranged vertically and could therefore be applied flat against the vertical edge of a stone placed flat. This is the case for example in the machine according to FR 1 422 266. However, a machine of this kind cannot be used for the type of work to which the subject of the invention relates, that is to say finishing the polishing of the edge of a stone laid flat using the same machine as that used initially for the roughing of this polishing with roller-grinders with vertical axis. Moreover, the machine according to FR 1 422 266 is very complex and unsuitable for the work envisaged. In addition, it cannot be used for polishing a curved profile edge.

La publication japonaise de brevet JP 59 134 655 concerne un dispositif pour le polissage d'une surface verticale, lequel est adaptable à l'arbre vertical d'une machine de polissage. Ce dispositif comporte une meule placée dans un plan vertical et dont l'arbre horizontal est porté par un support susceptible d'être suspendu à la broche verticale d'une machine de polissage.Japanese patent publication JP 59 134 655 relates to a device for polishing a vertical surface, which is adaptable to the vertical shaft of a polishing machine. This device comprises a grinding wheel placed in a vertical plane and the horizontal shaft of which is carried by a support capable of being suspended from the vertical spindle of a polishing machine.

Cependant ce dispositif est relativement compliqué et par ailleurs il permet uniquement le travail d'une surface verticale. Ce dispositif ne peut donc pas être employé pour le polissage de chants présentant une certaine inclinaison.However, this device is relatively complicated and moreover it only allows the work of a vertical surface. This device cannot therefore be used for polishing edges with a certain inclination.

C'est pourquoi la présente invention a pour but de réaliser un dispositif de conception très simple, susceptible d'être adapté sur la broche verticale d'une machine de polissage et qui est apte à permettre de procéder aussi bien au polissage du chant incliné ou du chant vertical d'une pierre ou autre pièce à polir.This is why the present invention aims to achieve a device of very simple design, capable of being adapted on the vertical spindle of a polishing machine and which is able to allow both to polish the inclined edge or the vertical edge of a stone or other piece to be polished.

A cet effet l'invention a pour objet un dispositif adaptable sur la broche à axe vertical d'une machine de polissage, et qui est destiné à permettre le surfaçage et le polissage du chant d'une pierre ou d'un élément préfabriqué massif posé à plat, et ce au moyen d'une meule rotative dont la face de travail est disposée verticalement, cependant que le support de son arbre horizontal d'entraînement est suspendu à la broche à axe vertical de la machine correspondante de polissage, en laissant cette broche libre en rotation pour permettre la face verticale de travail de la meule de s'orienter par rapport au chant de la pierre ou autre matériau à polir, l'agencement étant tel que la ligne d'usure médiane de la face de travail de la meule soit disposée dans un plan passant par l'axe vertical de la broche de la machine sur laquelle est adapté le présent dispositif, caractérisé en ce que le support de l'arbre horizontal de la meule consiste en un boîtier portant également le moteur d'entraînement de cet arbre, et ce boîtier est suspendu à un support associé à la broche rotative à axe vertical de la machine d'usinage correspondante, par l'intermédiaire d'un dispositif d'attache articulée comprenant deux parties articulées autour d'un axe commun, un organe de blocage permettant d'immobiliser ce boîtier dans la position voulue. Ainsi, le boîtier portant l'arbre d'entraînement de la meule de travail peut être disposé horizontalement si le chant à polir est vertical et il peut être placé dans toute inclinaison voulue si ce chant est incliné.To this end the invention relates to a device adaptable to the spindle with a vertical axis of a polishing machine, and which is intended to allow the surfacing and polishing of the edge of a stone or of a solid prefabricated element placed flat, by means of a rotating grinding wheel, the working face of which is arranged vertically, while the support of its horizontal drive shaft is suspended from the spindle with a vertical axis of the corresponding polishing machine, leaving this spindle free to rotate to allow the vertical working face of the grinding wheel to orient itself in relation to the edge of the stone or other material to be polished, the arrangement being such that the median wear line of the working face of the grinding wheel is arranged in a plane passing through the vertical axis of the spindle of the machine on which this device is adapted, characterized in that the support of the horizontal shaft of the grinding wheel consists of a housing also carrying the motor training ent of this shaft, and this housing is suspended from a support associated with the rotary spindle with a vertical axis of the corresponding machining machine, by means of an articulated attachment device comprising two parts articulated around a common axis, a locking member making it possible to immobilize this box in the desired position. Thus, the housing carrying the drive shaft of the working wheel can be arranged horizontally if the edge to be polished is vertical and it can be placed in any desired inclination if this edge is inclined.

Mais dans un cas comme dans l'autre, l'ensemble du présent dispositif peut tourner autour de l'axe vertical de la broche de la machine sur laquelle ce dispositif est adapté. En conséquence, lorsque la meule est en contact de pression avec le chant de la pierre à polir, elle suit exactement le contour ébauché, quel que soit le profil de celui-ci et notamment la succession de parties droites, concaves ou convexes qu'il présente.But in either case, the whole of the present device can rotate around the vertical axis of the spindle of the machine on which this device is adapted. Consequently, when the grinding wheel is in pressure contact with the edge of the polishing stone, it follows exactly the outline outlined, whatever its profile and in particular the succession of straight, concave or convex parts that it present.

Il est ainsi possible de fraiser, surfacer et polir avec un degré de finition remarquable le chant de la pierre ou de toute autre élément préfabriqué massif quels que soient les emplacements ou doivent agir les meules de travail, en particulier les parties disposées à l'intérieur du volume de la pierre, par exemple les tableaux de fenêtre ou des éléments préfabriqués de façade d'immeubles.It is thus possible to mill, surface and polish with a remarkable degree of finish the edge of the stone or any other solid prefabricated element whatever the locations where the grinding wheels must act, in particular the parts arranged inside the volume of the stone, for example window paintings or prefabricated elements of building facades.

D'autres caractéristiques et avantages d'un dispositif de surfaçage et de polissage établi conformément à l'invention apparaîtront encore à travers la description qui suit de plusieurs exemples de réalisation, donnés à titre indicatif et non limitatif en référence aux dessins annexés sur lesquels:

  • - La figure 1 est une vue schématique en coupe transversale d'un dispositif établi conformément à un premier mode de réalisation,
  • - La figure 2 est une vue en coupe d'une variante de ce premier mode de réalisation, illustré sur la figure précédente,
  • - les figures 3 et 4 sont des vues en coupe de deux autres variantes de réalisation.
Other characteristics and advantages of a surfacing and polishing device established in accordance with the invention will become more apparent from the following description of several exemplary embodiments, given by way of non-limiting example with reference to the appended drawings in which:
  • FIG. 1 is a schematic view in cross section of a device established in accordance with a first embodiment,
  • FIG. 2 is a sectional view of a variant of this first embodiment, illustrated in the preceding figure,
  • - Figures 3 and 4 are sectional views of two other alternative embodiments.

Seulement le mode de réalisation dans la figure 4 est revendiqué.Only the embodiment in Figure 4 is claimed.

On a repris sur ces diverses figures des chiffres de référence identiques pour désigner sur les unes et les autres les mêmes organes.Identical reference numbers have been used in these various figures to designate the same members on both.

Dans l'exemple de réalisation représenté sur la figure 1, la référence 1 désigne dans son ensemble, un dispositif pour permettre le surfaçage et le polissage du chant vertical latéral d'une pierre ou d'un élément préfabriqué analogue (non représenté), posé à plat sur le support d'une machine d'usinage d'un type en lui-même connu.In the embodiment shown in Figure 1, the reference 1 designates as a whole, a device to allow the surfacing and polishing of the lateral vertical edge of a stone or a similar prefabricated element (not shown), placed flat on the support of a machining machine of a type known per se.

Cette machine comporte notamment une broche verticale montée en rotation autour d'un axe représenté sur le dessin sous la référence 2, le dispositif avec sa bride 3 venant se visser sur la broche à axe vertical 2 de la machine.This machine comprises in particular a vertical spindle mounted for rotation about an axis shown in the drawing under reference 2, the device with its flange 3 being screwed onto the spindle with vertical axis 2 of the machine.

Le dispositif 1 monté sous l'axe vertical 2 de la broche est composé principalement d'un axe de transmission vertical 4 monté à l'intérieur d'un boîtier principal 5 comportant deux parties qui, dans l'exemple de réalisation illustré sur la figure, sont désignées sous les références 5a et 5b et s'étendent sensiblement perpendiculairement l'une à l'autre. L'arbre 4 disposé selon l'axe vertical 2 de la broche est monté rotatif avec cette dernière à l'intérieur de la partie 5a du boîtier sur des paliers à billes tels que 6 et 7. A son extrémité inférieure, l'arbre 4 comporte un embout 8 sur lequel est immobilisé un pignon conique 9 bloqué en bout par une clavette de butée axiale 10.The device 1 mounted under the vertical axis 2 of the spindle is mainly composed of a vertical transmission axis 4 mounted inside a main housing 5 comprising two parts which, in the embodiment illustrated in the figure , are designated under the references 5a and 5b and extend substantially perpendicular to each other. The shaft 4 arranged along the vertical axis 2 of the spindle is rotatably mounted with the latter inside the part 5a of the housing on ball bearings such as 6 and 7. At its lower end, the shaft 4 comprises a nozzle 8 on which a conical pinion 9 is immobilized, blocked at the end by an axial stop key 10.

Le pignon conique 9 est prévu pour coopérer avec un second pignon conique 11, fixé sur l'embout d'extrémité 12 d'un axe horizontal 13, s'étendant à l'intérieur de la seconde partie 5b du boîtier 5, cet arbre 13 ayant son axe horizontal et par conséquent perpendiculaire à l'axe 2 de la broche d'entraînement. L'arbre horizontal 13 est monté rotatif à l'intérieur du boîtier 5b sur des roulements 14 et 15 et comporte à son extrémité opposée à l'extérieur du boîtier une tête 16 sur laquelle peut être immobilisée, par des moyens en eux-mêmes classiques, une meule boisseau 17 dont la figure illustre schématiquement le profil.The bevel gear 9 is designed to cooperate with a second bevel gear 11, fixed on the end piece 12 of a horizontal axis 13, extending inside the second part 5b of the housing 5, this shaft 13 having its horizontal axis and therefore perpendicular to axis 2 of the drive spindle. The horizontal shaft 13 is rotatably mounted inside the housing 5b on bearings 14 and 15 and has at its opposite end outside the housing a head 16 on which can be immobilized, by means in themselves conventional , a cup wheel 17 whose figure schematically illustrates the profile.

A son extrémité opposée, l'axe horizontal 13 comporte un alésage axial 18 sur lequel vient se brancher un raccord tournant 19, lui-même relié à une centrale d'alimention en eau (non représentée) permettant d'injecter par l'intérieur de l'axe 13 vers la meule boisseau 17 l'eau nécessaire à la lubrification de cette meule lors de son utilisation pour le surfaçage et le polissage de la pierre à travailler.At its opposite end, the horizontal axis 13 has an axial bore 18 to which is connected a rotary connector 19, itself connected to a central water supply (not shown) for injecting from the inside of the axis 13 towards the cup wheel 17 the water necessary for the lubrication of this wheel during its use for surfacing and polishing the stone to be worked.

Sur la figure 1, la meule boisseau 17 d'un type en lui-même parfaitement connu, est représentée avec une ligne transversale en pointillé 20, schématisant en moyenne la zone d'attaque de la meule sur le chant de la pierre à usiner selon l'usure de cette meule en cours d'utilisation.In FIG. 1, the cup wheel 17 of a type which is itself perfectly known, is shown with a dotted transverse line 20, schematically showing on average the zone of attack of the wheel on the edge of the stone to be machined according to the wear of this grinding wheel during use.

Comme on le voit, la ligne pointillée 20 de la meule est située à une distance désignée sur le dessin par la référence L par rapport à l'axe vertical de la broche rotative entraînant l'ensemble du mécanisme et notamment réalisant la rotation de la moule boisseau 17 par l'intermédiaire de son arbre support 13 grâce, au système de renvoi à pignons coniques 9 et 10.As can be seen, the dotted line 20 of the grinding wheel is located at a distance designated in the drawing by the reference L with respect to the vertical axis of the rotary spindle driving the entire mechanism and in particular carrying out the rotation of the mold plug 17 via its support shaft 13 thanks to the bevel gear system 9 and 10.

Par construction, on réduit autant que possible la distance L de manière à éviter le porte à faux de la meule par rapport à l'axe de la broche rotative. En outre, ces dispositions conduisent à transmettre à la meule une certaine indertie du fait de la rotation de l'axe. De plus en raison de la distance L précédente, en fonctionnement, la meule 17 a tendance à subir par rapport au chant la pierre un certain mouvement d'oscillation par rapport à son axe ou encore à "bêcher" légèrement au fur et à mesure de son déplacement sur le chant de la pierre.By construction, the distance L is reduced as much as possible so as to avoid the overhang of the grinding wheel relative to the axis of the rotary spindle. In addition, these provisions result in transmitting to the wheel a certain inertia due to the rotation of the axis. In addition, due to the previous distance L, in operation, the grinding wheel 17 tends to undergo a certain movement of oscillation with respect to the edge of the stone relative to its axis or else to "dig" slightly as the its displacement on the song of the stone.

Pour pallier cet inconvénient et limiter autant que possible l'effet d'oscillation de la moule, une première solution peut consister à monter autour du boîtier 5 portant cette dernière un contre-poids ou des ressorts de stabilisation limitant dans une certaine mesure l'effet d'entraînement par inertie du boîtier.To overcome this drawback and limit the oscillation effect of the mold as much as possible, a first solution may consist in mounting around the housing 5 carrying the latter a counterweight or stabilizing springs limiting to some extent the effect inertial drive of the housing.

La figure 2 illustre un autre mode de réalisation du dispositif selon l'invention qui permet d'éliminer plus efficacement en cours d'utilisation l'effet d'oscillation de la meule et les inconvénients que celui-ci peut présenter pour l'usinage et le surfaçage parfait du chant de la pierre à travailler. Cette solution consiste à éviter tout porte à faux de la meule par rapport à l'axe de rotation de la broche, en ramenant à zéro la valeur de la distance 1 prévue dans le premier exemple de réalisation.FIG. 2 illustrates another embodiment of the device according to the invention which makes it possible to eliminate more effectively during use the oscillation effect of the grinding wheel and the drawbacks that it may present for machining and the perfect surfacing of the edge of the stone to be worked. This solution consists in avoiding any overhang of the grinding wheel with respect to the axis of rotation of the spindle, by reducing to zero the value of the distance 1 provided for in the first embodiment.

A cet effet le dispositif considéré, qui pour l'ensemble reprend les dispositions mécaniques mises en oeuvre dans le premier exemple, comporte un boîtier complémentaire 21 intercalé entre l'axe de rotation vertical 2 de la broche et le corps du boîtier principal 5. A cet effet l'axe 2 de la broche entraine à l'intérieur du boîtier 21 un arbre intermédiaire vertical 22 sur lequel est immobilisé un pignon droit 23 engrenant lui- même avec un pignon 3 de même diamètre 24 immobilisé sur l'axe 4 monté à l'intérieur de la partie 5a du boîtier 5.To this end, the device under consideration, which for the whole takes up the mechanical arrangements implemented in the first example, comprises an additional housing 21 interposed between the vertical axis of rotation 2 of the spindle and the body of the main housing 5. A this effect the axis 2 of the spindle drives inside the housing 21 a vertical intermediate shaft 22 on which is immobilized a straight pinion 23 meshing itself with a pinion 3 of the same diameter 24 immobilized on the axis 4 mounted at the interior of part 5a of the housing 5.

Dans cette variante de réalisation la ligne en pointillé 20, représentant la face moyenne d'attaque de la meule boisseau 17 contre le chant de la pierre à surfacer et à polir selon l'usure de cette meule, se trouve sensiblement dans l'axe vertical 2 de rotation de la broche, ce qui permet d'éliminer l'effet de porte à faux constaté précédemment. Toutefois dans cette variante subsiste encore l'effet d'inertie créé par la rotation de la broche et rend utile de maintenir sur le boîtier principal de l'appareil un contre-poids ou des ressorts permettant d'améliorer la stabilité de l'ensemble.In this alternative embodiment, the dotted line 20, representing the average attack face of the cup wheel 17 against the edge of the stone to be surfaced and polished according to the wear of this wheel, is located substantially in the vertical axis. 2 spindle rotation, which eliminates the cantilever effect noted previously. However, in this variant, there still remains the inertia effect created by the rotation of the spindle and makes it useful to maintain a counterweight or springs on the main housing of the device making it possible to improve the stability of the assembly.

Dans une troisième variante de réalisation illustrée sur la figure 3, l'axe vertical de la broche 2 n'assure plus directement la commande du mouvement d'entraînement de l'arbre horizontal de la meule boisseau.In a third variant embodiment illustrated in FIG. 3, the vertical axis of the spindle 2 no longer directly controls the driving movement of the horizontal shaft of the cup wheel.

Dans cette variante, la broche à axe vertical 2 est associée à un support 25 sous lequel est fixée une console 26 par l'intermédiaire d'une bride d'immobilisation 27. A l'extrémité opposée du support 26 est monté le boîtier principal 28 à l'intérieur duquel s'étend horizontalement un arbre d'entraînement horizontal 29, guidé dans le boîtier sur des paliers tels que 30 et 31. A l'une de ses extrémités, l'arbre 29 est directement connecté à un moteur hydraulique ou analogue 32 et comporte à son extrémité opposée une tête 33 sur laquelle est fixée une meule boisseau 34, dont la ligne d'usure médiane schématisée sous la référence 35 est sensiblement disposée dans le plan de l'axe vertical 2 de la broche.In this variant, the spindle with vertical axis 2 is associated with a support 25 under which is fixed a console 26 by means of an immobilizing flange 27. At the opposite end of the support 26 is mounted the main housing 28 inside which extends horizontally a horizontal drive shaft 29, guided in the housing on bearings such as 30 and 31. At one of its ends, the shaft 29 is directly connected to a hydraulic motor or similar 32 and has at its opposite end a head 33 on which is fixed a cup wheel 34, the median wear line shown diagrammatically under the reference 35 is substantially arranged in the plane of the vertical axis 2 of the spindle.

Dans cette variante, la broche de la machine est ainsi laissée libre en rotation pour permettre à la face de la meule boisseau de s'orienter par rapport au chant de la pierre posée à plat qu'il convient de surfacer et de polir.In this variant, the spindle of the machine is thus left free to rotate in order to allow the face of the cup wheel to orient itself relative to the edge of the stone laid flat which should be planed and polished.

L'ensemble réalisé est de conception très simple et rapide à monter, nécessitant seulement son adaptation à la broche rotative 2 et sa fixation à la manière d'un mandrin porte-outils. A noter que la conception du dispositif dans cette troisième variante de réalisation permet d'ajuster facilement la position de la meule par rapport au chant de la pierre à surfacer et polir afin d'obtenir une meilleure tenue de l'ensemble lorsque la meule se déplace en pression sur les formes concav ou convexes du chant de cette pierre.The assembly produced is very simple and quick to assemble, requiring only its adaptation to the rotary spindle 2 and its fixing in the manner of a tool chuck. It should be noted that the design of the device in this third variant of embodiment makes it possible to easily adjust the position of the grinding wheel relative to the edge of the stone to be surfaced and polished in order to obtain a better hold of the assembly when the grinding wheel is moving. in pressure on the concav or convex forms of the song of this stone.

La figure 4 représente une autre variante dérivée de celle de la figure 3. Cette autre variante se différencie de la précédente par le fait que le boîtier principal correspondant 28a, à l'intérieur duquel s'étend l'arbre d'entraînement 29a, est attaché au support correspondant 25a par l'intermédiaire d'un dispositif de liaison articulée. Ce dispositif comprend un bras 26a solidaire du support 25a et une plaque 26b solidaire du boîtier 28a. Ces deux pièces s'articulent autour d'un axe commun 36. De plus le bras 26a porte un doigt 37 engagé dans une fente 38 en forme d'arc de cercle ménagée dans la plaque 26b, ce doigt portant luimême un écrou de blocage muni d'un levier de manoeuvre 39.FIG. 4 represents another variant derived from that of FIG. 3. This other variant differs from the previous one in that the corresponding main housing 28a, inside which the drive shaft 29a extends, is attached to the corresponding support 25a via an articulated connection device. This device comprises an arm 26a secured to the support 25a and a plate 26b secured to the housing 28a. These two parts are articulated around a common axis 36. In addition, the arm 26a carries a finger 37 engaged in a slot 38 in the form of an arc of a circle formed in the plate 26b, this finger carrying itself a locking nut provided an operating lever 39.

Ainsi il est possible d'incliner le boîtier 28b en le faisant pivoter autour de l'axe 36 et en le bloquant dans la position voulue au moyen du levier 39. Ceci permet d'utiliser l'appareil correspondant pour effectuer le polissage de chants inclinés et non pas seulement pour celui de chants verticaux d'une pierre ou similaire.Thus it is possible to tilt the housing 28b by pivoting it around the axis 36 and locking it in the desired position by means of the lever 39. This allows the corresponding apparatus to be used for polishing inclined edges and not just for the vertical chanting of a stone or the like.

Cependant dans cette variante l'agencement de l'appareil reste par ailleurs le même que dans la variante selon la figure 3. Ainsi le support 25a est également agencé pour être associé à la broche d'entraînement 2 dans les mêmes conditions que précédemment. Quant à l'arbre de la meule 34a, il est monté dans le boîtier 28a de la même façon et son entraînement est assuré par un moteur hydraulique 32a, ou analogue, dont le carter est fixé sur l'extrémité du boîtier 28a qui est opposée à la meule 34a.However, in this variant, the arrangement of the device also remains the same as in the variant according to FIG. 3. Thus the support 25a is also arranged to be associated with the drive spindle 2 under the same conditions as above. As for the shaft of the grinding wheel 34a, it is mounted in the housing 28a in the same way and its drive is ensured by a hydraulic motor 32a, or the like, the housing of which is fixed on the end of the housing 28a which is opposite to the wheel 34a.

Claims (1)

  1. Device which is adaptable to the vertical spindle of a polishing machine and which is intended to permit surface-grinding and polishing of the edge face of a stone or of a massive prefabricated element laid in a flat position, this being achieved by means of a rotary grinding- wheel having a vertically disposed work face whilst the support of its horizontal driving shaft is suspended from the vertical spindle of the corresponding polishing machine, this spindle being allowed to rotate freely so as to permit orientation of the vertical work face of the grinding-wheel with respect to the edge face of the stone or other material to be polished, the arrangement being such that the median line of wear of the work face of the grindingwheel is disposed in a plane which passes through the vertical axis of the spindle of the machine to which the present device is adapted, characterized in that the support of the horizontal shaft (29) of the grinding-wheel (34a) consists of a housing (28a) which also carries the motor (32a) for driving said shaft, and said housing is suspended from a support (25a) associated with the vertical axis (2) of the spindle of the corresponding grinding machine by means of an articulated coupling device comprising two portions (25a and 26b) pivotally mounted on a common pin (36), a locking member (39) for immobilizing said housing (28a) in the desired position.
EP19860400430 1985-03-06 1986-02-28 Device for surfacing or polishing the vertical edge of a stone or a solid prefabricated element Expired EP0196941B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8503301 1985-03-06
FR8503301A FR2578467B1 (en) 1985-03-06 1985-03-06 DEVICE FOR SURFACING AND POLISHING THE VERTICAL EDGE OF A STONE OR A MASS PREFABRICATED ELEMENT

Publications (2)

Publication Number Publication Date
EP0196941A1 EP0196941A1 (en) 1986-10-08
EP0196941B1 true EP0196941B1 (en) 1989-08-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860400430 Expired EP0196941B1 (en) 1985-03-06 1986-02-28 Device for surfacing or polishing the vertical edge of a stone or a solid prefabricated element

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EP (1) EP0196941B1 (en)
JP (1) JPS61230854A (en)
DE (1) DE3665143D1 (en)
FR (1) FR2578467B1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVR20030049U1 (en) 2003-10-01 2005-04-02 Montresor & C Srl DIMA DEVICE FOR CHECKING THE HANDLING OF CUTTERS DIAM ANTATE OR SIMILAR, APPLICABLE ON POLISHED SLAB MACHINES IN MATE RIALE LAPIDEO.
FR2936438B1 (en) * 2008-10-01 2011-05-20 Thibaut MACHINING DEVICE FOR POLISHING EDGES FOR COMPLETE AUTOMATION OF THE OPERATION
TW201300194A (en) * 2011-06-21 2013-01-01 Fepotec Ind Co Ltd Corner type spindle
CN102248481B (en) * 2011-07-20 2013-07-03 飞浦实业股份有限公司 Corner type main shaft
DE102011051962B4 (en) * 2011-07-20 2015-05-13 Sebald Schleifmittel GmbH & Co. KG Arrangement for receiving a grinding head
CN102909640B (en) * 2012-11-09 2015-03-04 昆山市大金机械设备厂 Swing-type polishing device
CN108581679B (en) * 2018-05-04 2019-02-12 深圳市中航装饰设计工程有限公司 A kind of construction and decoration metope sander
CN115284095A (en) * 2021-12-02 2022-11-04 浙江理工大学 Grinding and polishing machine for seal stone

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Publication number Priority date Publication date Assignee Title
US2127071A (en) * 1928-11-16 1938-08-16 Charles H Schmalz Apparatus for grinding
US1946864A (en) * 1930-03-17 1934-02-13 Jr Orville H Foster Grinding machine
GB730778A (en) * 1952-06-23 1955-06-01 Samuel Charles Peckett Method and means for preparing true surfaces
US2994990A (en) * 1957-05-24 1961-08-08 Mets Owerk Class Rauch & Schni Grinding and polishing machine
GB956762A (en) * 1962-04-16 1964-04-29 Hammond Machinery Builders Inc Polishing and buffing apparatus
FR1422266A (en) * 1964-11-09 1965-12-24 Improvements to polishing machines
FR2506652A3 (en) * 1981-05-29 1982-12-03 Lgb Bricaud Biaxially adjustable tool head for rectifying machine - can swivel about two normal axes on elevator slide with work on orthogonal slide below
JPS59134655A (en) * 1983-01-21 1984-08-02 Hitachi Ltd Grinding apparatus

Also Published As

Publication number Publication date
EP0196941A1 (en) 1986-10-08
DE3665143D1 (en) 1989-09-28
FR2578467A1 (en) 1986-09-12
FR2578467B1 (en) 1989-03-31
JPS61230854A (en) 1986-10-15

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