EP0104291A1 - Machine with turning tool for reproduction and finishing work and especially for treating the outline of a piece fitted on a reproduction template - Google Patents

Machine with turning tool for reproduction and finishing work and especially for treating the outline of a piece fitted on a reproduction template Download PDF

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Publication number
EP0104291A1
EP0104291A1 EP82401778A EP82401778A EP0104291A1 EP 0104291 A1 EP0104291 A1 EP 0104291A1 EP 82401778 A EP82401778 A EP 82401778A EP 82401778 A EP82401778 A EP 82401778A EP 0104291 A1 EP0104291 A1 EP 0104291A1
Authority
EP
European Patent Office
Prior art keywords
tool
work
strip
template
reproduction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP82401778A
Other languages
German (de)
French (fr)
Inventor
Roland Darthial
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Comeca Sa Ste
Original Assignee
Comeca Sa Ste
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Comeca Sa Ste filed Critical Comeca Sa Ste
Priority to EP82401778A priority Critical patent/EP0104291A1/en
Priority to ES526039A priority patent/ES8406265A1/en
Publication of EP0104291A1 publication Critical patent/EP0104291A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B17/00—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor
    • B24B17/02—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only
    • B24B17/028—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only using an abrasive belt
    • 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
    • B24B21/06—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving members with limited contact area pressing the belt against the work, e.g. shoes sweeping across the whole area to be ground
    • B24B21/08—Pressure shoes; Pressure members, e.g. backing belts
    • 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/18—Accessories

Definitions

  • the present invention relates to a rotary tool machine for reproduction or finishing work and in particular for machining the contour of a part fixed flat above a reproduction template.
  • patent 81400336.4 machine object consists of a b â- ti on which is mounted a fixed worktable relative to the ground with at least one horizontal working plane in the region of which is located or partially located a tool rotary fixed on a vertical rotary shaft substantially above a cylindrical guide mounted idly on the same axis.
  • the guide is equipped with means for holding the workpiece jig assembly at different distances from the tool.
  • the guide has steps of different diameters and is mounted on a sleeve fitted on the drive shaft so that said sleeve is free in translation to bring one of the steps of the guide opposite the template.
  • the optimal depth of pass depends on several factors such as the nature of the material at the factory, the speed of rotation of the tool and the quality of the desired machining.
  • the main disadvantage of using a machining guide with steps is that the different depths of pass at which the workpiece can be worked are invariable and therefore suitable for a very limited range of rotational speeds. the tool and the material to be machined.
  • this type of step guide requires the user to penetrate the tool into the workpiece in one go, that is to say until the template comes into contact with the guide.
  • the user must therefore exert significant pressure on the tool so that it penetrates into the part of the designated depth of pass.
  • the rotary tool is preferably constituted by an endless abrasive belt mounted on two end rollers, one of which is equipped with a machining guide.
  • proximity sensors are used. However, it turned out that these sensors sucked in dust during their operation, which had the consequence of blocking the pneumatic circuit.
  • the machine according to the invention is essentially characterized in that the machining guide is conical in order to allow a wider choice of machining depth and a progressive depth of pass which can be adapted to depending on the effort provided by the user.
  • the machine facing the right side of the strip is equipped with a surfacing station.
  • the machine is equipped with proximity sensors capable of constant leakage, thus avoiding any dust suction.
  • the rotary tool machine for reproduction or finishing work and in particular for machining the contour of a part 1 fixed flat above a reproduction template 2 consists of a frame 3A on which is mounted a work table 4 fixed relative to the ground, provided with at least one horizontal work surface 5 in the area of which is located or partially located at least one tool 6 fixed on a vertical rotating shaft 7 substantially above a guide 8 mounted idly on the same axis, cooperating with the edge of the template 2, the template and part assembly being movable on the work surface 4.
  • Said machine according to the present invention is essentially characterized in that the guide 8 has the shape of a truncated cone whose smallest diameter is equal or substantially equal to the diameter of the tool 6 in order to obtain depths of pass tool 6 variables in part 1 continuously.
  • the template 2 is in contact with the guide 8 and according to the value of the diameter of said guide at the place where the template 2 rests, the plane containing the edge thereof in contact with the guide is more or less close to tool 6.
  • a fork 10 is articulated to the sleeve 9 and is actuated around a point of articulation 11 by a system of any known type, for example as shown in FIG. 2 a screw 12 with an inverted pitch cooperating with two end nuts 13 and two play take-up springs 14 and actuated by a knurled bolt 15 median with the screw controlled manually or else electrically or by any other means known to man of art.
  • the vertical translational movement of the sleeve 9 and of the guide 8 is progressive and precise because it can easily be controlled for example by a graduated scale (not shown) placed near the actuating means of the inverted-pitch screw 12.
  • the tool 6 is preferably constituted by an endless abrasive belt 16 stretched between two end rollers 17 and 18.
  • the front roller 17 is driven by the vertical rotary shaft (7) on which the guide 8 is mounted.
  • the strip 16 is driven by the rollers.
  • the use of such an abrasive tool makes it possible to add additional workstations to the machine.
  • the work table 3 is provided with at least one lateral work surface 19 to carry out for example a surfacing operation.
  • This surfacing operation is carried out using a member placed inside the space defined by the strip 16 between the end rollers 17 and 18.
  • This surfacing member shown in FIG. 3 is constituted by a shoe 20 pushing horizontally and perpendicularly the portion of the strip 16 lying opposite an opening 21 formed between two vertical and smooth support planes 22.
  • the shoe 20 receives an elastic sheet 23 separating the front face of the latter from the strip 16.
  • Said sheet has two side walls 24 secured to a central core 25 of length and height substantially less than those of the opening 21 and each provided at their end with a support surface 26 of preferably rounded shape enclosing the said shoe on its sides perpendicular to the work surface.
  • the distance between the two bearing surfaces 26 of the two side walls 24 when the elastic sheet is separated from the shoe 20 is less than the length of said shoe.
  • the elasticity of the sheet 23 allows the walls 24 to move away from one another by sliding on the front face of the shoe and coming to grip the said shoe on its sides.
  • the sheet 23 is held on the shoe 20 by its own elasticity.
  • the bearing surfaces 26 are in contact on the one hand with the sides of the shoe and on the other hand with a face perpendicular to the side and forming with it a current recess over the entire height of the shoe 20.
  • a recess 28 allowing the passage of a flat tool for separating the sheet from the shoe.
  • a part is pressed against the support planes 22, at least one of which may be provided with an extension opposite the opening 21 and on the lateral work surface 19, the shoe 20 is actuated in translation horizontal, perpendicular to the strip 16 by means which will be described later, which has the effect of pushing the strip into said opening 21 until the strip comes into contact with the part in order to machine it.
  • the strip 16 is rotated by the end rollers and in order to reduce the coefficient of friction between the rear face of the strip and the elastic sheet 23 the latter is covered with a coating 29 provided on its face in contact with the band with an anti-friction surface thus reducing the resistance to movement of the band.
  • the means for actuating the shoe 20 are constituted according to a preferred embodiment shown in FIG. 3 by a screw 30 b locked in translation, for example circlips in a yoke 31 and cooperating by a threaded orifice 32.
  • These springs 33 are preferably four in number symmetrically arranged with respect to the longitudinal and transverse axes of said shoe and are advantageously placed in housings 34 formed in the yoke 31 and in the rear face of the shoe 20.
  • the side work surface 19 for surfacing is preferably articulated to an axis transverse to the work table 3 over its entire length in order to be able to surface parts having angles greater than or less than 90 ° between the surface to be machined. and the bearing surface on said plane.
  • the strip 16, the end rollers 17 and 18, their mechanism and the drive guide 8 constitute a frame 3B movable vertically with respect to the frame 3A carrying the work plan (s).
  • the adjustment of the depth of pass of the strip 16 on the front roller 17 in the part 1 is not done by the system previously described but by choosing or raising the frame 3B relative to the work plan , while maintaining the template 2 against the guide 8 mounted idly under the roller 17.
  • the mobility in the vertical direction of said frame 3B makes it possible, on the one hand, to surface very tall parts and, on the other hand, allows wear to be distributed over the entire width of said strip 16.
  • Actuation in translation vertical of the frame 3B is produced by any lifting means known to those skilled in the art, for example an endless screw cooperating with two branches lifting the frame 3B at three points, the said frame 3B being provided on its sides with three rollers grooved freely moving on vertical slides integral with the frame 3A.
  • Said worm is controlled manually or electrically or by any other means known to those skilled in the art.
  • IJne graduated rule close to the actuating means of the worm allows to control the regularity and the precision of the vertical movement of the frame 3B and therefore of the depth of the tool pass in the contour of the workpiece and the distribution of wear on the abrasive belt 16.
  • the distribution of wear is also controlled by an oscillation system acting on the rear roller 18 in order to provide the abrasive belt 16 with an alternating vertical movement on the front roller 17.
  • This oscillation movement is carried out from a pneumatic circuit shown in fig. 5.
  • This pneumatic circuit comprises, on the one hand, means for tensioning the strip 16 between the rollers 17 and 18 and, on the other hand, oscillation means allowing the reciprocating vertical movement of the strip 16 on the front roller 17.
  • the means for tensioning the strip 16 shown in FIG. 4 consist of at least one cylinder 37 of the type for example single acting and spring return whose rod 38 is fixed perpendicularly and parallel to the longitudinal axis of the strip on the middle part of a yoke 39 supporting the shaft 40 on which the rear roller 18 is mounted.
  • the tension of the belt 16 is adjustable by a valve placed on the pneumatic circuit acting on the pressure in the cham- ber of the cylinder.
  • the pneumatic circuit is provided with a pressure regulator 41, a flow regulator 42 and a lubrication 43 mounted upstream of the actuator 37.
  • the machine comprises at least two abrasive bands 16 and therefore it goes without saying that the elements of the pneumatic circuit are equal to the number of bands.
  • the oscillation means shown in fig. 4 are constituted by a jack 44 of the type, for example with double effect secured by its rod to a band 45 fixed to the yoke 39 and situated in the extension of the shaft 40 carrying the rear roller. 18.
  • the axis of the jack 44 is perpendicular to the longitudinal axis of the strip 16.
  • Said cylinder 44 acts on the bar 45, the rod 38 of the tensioning cylinder 37 constitutes a pivot axis and therefore the movement of cylinder 44 causes a circular oscillatory movement relative to the rod 38 of cylinder 37.
  • This oscillatory movement is allowed by two sensors 46 located behind the abrasive belt 16 and preferably on the front part of said band.
  • These sensors are preferably of the constant leakage type, thus avoiding the suction of dust liable to block the pneumatic circuit.
  • Said sensors are placed along the same vertical axis.
  • Each sensor 46 is connected to an amplifier 47.
  • Said amplifier 47 sends information in the form of an impulse to a distributor 48, for example of the type with five orifices and two positions which makes it possible to deflect the pneumatic flow in one of the chambers of the jack 44.
  • the jack 44 acts on the bar 45 which has the effect of making the rear roller 18 pivot relative to the rod 38 of the jack 37.
  • the supply of the sensors 46, of the amplifiers 47 is preferably not lubricated, unlike the distributors 48 and the jacks 44.
  • the sensors are movable vertically simultaneously or not and independently of the mobility of the frame 3B.
  • the sensors are mounted on a slide 49 movable on a slide 50 secured to the frame 3B as shown in FIG.
  • the actuation of the slide 49 on the slide 50 can be done by
  • a knurled button 51 actuated for example manually and near which a graduated scale can be added.
  • the mobility of the sensors 46 makes it possible on the one hand to vary the amplitude of the vertical movement of the abrasive strip 16 on the front roller 17 and in front of the opening 21 by surfacing in order to distribute the wear of
  • the vertical mobility of the sensors 46 simultaneously and independently of the frame 3B makes it possible to adjust the working position of the abrasive belt 16 relative to the workpiece.
  • the machine according to the invention makes it possible to obtain a continuous and precise depth of cut in the workpiece continuously, to add additional workstations to it and to distribute the wear of the tool over its entire width.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The machine according to the invention for reproduction or finishing work, and especially for machining the outline of a workpiece (1) fixed flat above a reproduction template (2), consists of a frame (3A) on which is mounted a work table (4), fixed with respect to the ground and provided with at least one horizontal work plane (5), in the area of which there is situated or partially situated at least one tool (6) fixed on a vertical rotating shaft (7), substantially above a guide mounted loosely on the same axle, and is essentially characterised in that the guide is in the form of a truncated cone, the smallest diameter of which is equal to the diameter of the tool (6) in order to obtain variable pass depths of the tool (6) in the workpiece (1) in a continuous manner. <IMAGE>

Description

La présente invention a pour objet une machine à outil rotatif pour les travaux de reproduction ou de finition et notamment pour l'usinage du contour d'une pièce fixée à plat au dessus d'un gabarit de reproduction.The present invention relates to a rotary tool machine for reproduction or finishing work and in particular for machining the contour of a part fixed flat above a reproduction template.

On connaît la machine objet du brevet 81400336.4 constituée d'un bâ- ti sur lequel est montée une table de travail fixe par rapport au sol dotée d'au moins un plan de travail horizontal dans la zone duquel est situé ou partiellement situé un outil rotatif fixé sur un arbre rotatif vertical sensiblement au dessus d'un guide cylindrique monté fou sur le même axe.Known the patent 81400336.4 machine object consists of a b â- ti on which is mounted a fixed worktable relative to the ground with at least one horizontal working plane in the region of which is located or partially located a tool rotary fixed on a vertical rotary shaft substantially above a cylindrical guide mounted idly on the same axis.

Contre le guide est appuyé le bord du gabarit et par déplacement de l'ensemble pièce et gabarit l'outil rotatif reproduit le contour du dit gabarit sur la dite pièce.Against the guide is pressed the edge of the template and by displacement of the part and template assembly the rotary tool reproduces the outline of said template on said piece.

Pour régler la profondeur de passe le guide est équipé de moyens pour maintenir l'ensemble gabarit pièce à différentes distances de l'outil. A cet effet, le guide présente des gradins de diamètres différents et est monté sur une douille emmanchée sur l'arbre d'entraînement de manière que la dite douille soit libre en translation pour amener un des gradins du guide en regard du gabarit.To adjust the depth of the pass, the guide is equipped with means for holding the workpiece jig assembly at different distances from the tool. To this end, the guide has steps of different diameters and is mounted on a sleeve fitted on the drive shaft so that said sleeve is free in translation to bring one of the steps of the guide opposite the template.

On sait que la profondeur de passe optimale dépend de plusieurs facteurs tels que la nature du matériau à usine, de la vitesse de rotation de l'outil et de la qualité de l'usinage désiré.It is known that the optimal depth of pass depends on several factors such as the nature of the material at the factory, the speed of rotation of the tool and the quality of the desired machining.

C'est ainsi que pour des travaux d'ébauche ou de demi finition selon lesquels la qualité de l'état de surface à peu d'importance, l'homme de l'art usine à des profondeurs de passe plus importantes que lors des travaux de finition.Thus, for roughing or semi-finishing work according to which the quality of the surface condition is of little importance, the person skilled in the art works at greater depths of cut than during the works. finishing.

Le principal inconvénient de l'utilisation d'un guide d'usinage doté de gradins réside dans le fait que les différentes profondeurs de passe suivant lesquelles peut être travaillées la pièce soient invariables et donc adaptées à une gamme très limitée de vitesses de rotation de l'outil et de matériau à usiner.The main disadvantage of using a machining guide with steps is that the different depths of pass at which the workpiece can be worked are invariable and therefore suitable for a very limited range of rotational speeds. the tool and the material to be machined.

De ce fait, notamment pour l'usinage de matériaux de nature diverse, il est necessaire de procéder au changement du guide d'usinage et donc d'immobiliser la machine.Therefore, especially for machining materials of various nature, it is necessary to change the machining guide and therefore to immobilize the machine.

En outre,ce type de guide à gradins oblige l'utilisateur à faire pénétrer l'outil dans la pièce en une seule fois c'est-à-dire jusqu'à ce que le gabarit vienne en contact avec le guide.In addition, this type of step guide requires the user to penetrate the tool into the workpiece in one go, that is to say until the template comes into contact with the guide.

L'utilisateur doit donc exercer sur l'outil une pression importante afin que celui-ci pénètre dans la pièce de la profondeur de passe dési gnée.The user must therefore exert significant pressure on the tool so that it penetrates into the part of the designated depth of pass.

Il s'est avéré que cette pression entrainait une usure prématurée de l'outil et une certaine fatigue pour l'utilisateur.It turned out that this pressure led to premature wear of the tool and some fatigue for the user.

De plus il est apparu à l'usage que cette disposition ne donnait pas entière satisfaction du fait que les profondeurs de pénétration de l'outil dans la pièce à usiner ou profondeurs de passe sont invariables.In addition, it has become apparent from use that this arrangement does not give complete satisfaction since the penetration depths of the tool in the workpiece or depths of pass are invariable.

L'outil rotatif est préférentiellement constitué par une bande abrasive sans fin montée sur deux rouleaux d'extrémité dont un est équipé d'un guide d'usinage.The rotary tool is preferably constituted by an endless abrasive belt mounted on two end rollers, one of which is equipped with a machining guide.

Pour réduire les coûts d'exploitation de la machine équipée d'un tel outil abrasif, il est apparu avantageux de lui adjoindre des postes de travail supplémentaires.To reduce the operating costs of the machine equipped with such an abrasive tool, it appeared advantageous to add additional work stations to it.

D'autre part il est connu de donner à la bande abrasive un mouvement oscillatoire sur les galets.On the other hand, it is known to give the abrasive belt an oscillatory movement on the rollers.

Afin d'obtenir ce mouvement, des capteurs de proximité sont utilisés. Mais, il s'est avéré que ces capteurs aspiraient des poussières lors de leur fonctionnement ce qui avait pour conséquence de boucher le circuit pneumatique.In order to obtain this movement, proximity sensors are used. However, it turned out that these sensors sucked in dust during their operation, which had the consequence of blocking the pneumatic circuit.

Pour résoudre les problèmes sus énoncés, la machine selon l'invention se caractérise essentiellement en ce que le guide d'usinage est conique afin d'autoriser un choix plus étendu de profondeur d'usinage et une profondeur de passe progressive pouvant s'adapter en fonction de l'effort fournir par l'utilisateur.To solve the above-mentioned problems, the machine according to the invention is essentially characterized in that the machining guide is conical in order to allow a wider choice of machining depth and a progressive depth of pass which can be adapted to depending on the effort provided by the user.

Selon une autre caractéristique de l'invention, la machine en regard de la partie droite de la bande est équipée d'un poste de surfaçage. Selon encore une autre caractéristique de l'invention la machine est équipée de capteurs de proximité propres à fuite constante évitant ainsi toute aspiraton de poussières.According to another characteristic of the invention, the machine facing the right side of the strip is equipped with a surfacing station. According to yet another characteristic of the invention, the machine is equipped with proximity sensors capable of constant leakage, thus avoiding any dust suction.

D'autres avantages et caractéristiques de l'invention apparaîtront à la lecture de la description d'une forme préférentielle de réalisation en se référant plus particulièrement aux dessins annexés en lesquels :

  • - La figure 1 est une vue d'ensemble de la machine selon l'invention.
  • - La figure 2 est une vue du galet conique et de ses moyens d'actionnement.
  • - La figure 3 est une vue de dessus des moyens de surfaçage.
  • - La figure 4 est une vue du montage des verins de tension et d'oscillation sur le galet arrière.
  • - La figure 5 représente schématiquement le circuit pneumatique.
  • - La figure 6 est une vue du montage des capteurs.
Other advantages and characteristics of the invention will appear on reading the description of a preferred embodiment with particular reference to the accompanying drawings in which:
  • - Figure 1 is an overview of the machine according to the invention.
  • - Figure 2 is a view of the conical roller and its actuating means.
  • - Figure 3 is a top view of the surfacing means.
  • - Figure 4 is a view of the mounting of the tension and oscillation cylinders on the rear roller.
  • - Figure 5 shows schematically the pneumatic circuit.
  • - Figure 6 is a view of the mounting of the sensors.

Telle que représentée en fig.1 la machine à outil rotatif pour les travaux de reproduction ou de finition et notamment pour l'usinage du contour d'une pièce 1 fixée à plat au dessus d'un gabarit 2 de reproduction, est constituée d'un bâti 3A sur lequel est montée une table de travail 4 fixe par rapport au sol,dotée d'au moins un plan de travail 5 horizontal dans la zone duquel est situé ou partiellement situé au moins un outil 6 fixé sur un arbre 7 rotatif vertical sensiblement au dessus d'un guide 8 monté fou sur le même axe, coopérant avec le bord du gabarit 2, l'ensemble gabarit et pièce étant mobile sur le plan de travail 4.As shown in fig.1 the rotary tool machine for reproduction or finishing work and in particular for machining the contour of a part 1 fixed flat above a reproduction template 2, consists of a frame 3A on which is mounted a work table 4 fixed relative to the ground, provided with at least one horizontal work surface 5 in the area of which is located or partially located at least one tool 6 fixed on a vertical rotating shaft 7 substantially above a guide 8 mounted idly on the same axis, cooperating with the edge of the template 2, the template and part assembly being movable on the work surface 4.

La dite machine selon la présente invention se caractérise essentiellement en ce que le guide 8 présente la forme d'un tronc de cône dont le plus petit diamètre est égal ou sensiblement égal au diamètre de l'outil 6 afin d'obtenir des profondeurs de passe variables de l'outil 6 dans la pièce 1 de façon continue.Said machine according to the present invention is essentially characterized in that the guide 8 has the shape of a truncated cone whose smallest diameter is equal or substantially equal to the diameter of the tool 6 in order to obtain depths of pass tool 6 variables in part 1 continuously.

En effet, le gabarit 2 est en contact avec le guide 8 et selon la valeur du diamètre du dit guide à l'endroit où s'appuie le gabarit 2 le plan contenant le bord de celui-ci en contact avec le guide est plus ou moins proche de l'outil 6.Indeed, the template 2 is in contact with the guide 8 and according to the value of the diameter of said guide at the place where the template 2 rests, the plane containing the edge thereof in contact with the guide is more or less close to tool 6.

Donc plus la valeur du diamètre du guide où s'appuie le gabarit tend à se rapprocher du diamètre de l'outil 6 plus les dimensions de la pièce tendent à être égales à celles du gabarit.Therefore, the more the value of the diameter of the guide on which the template is supported tends to approach the diameter of the tool 6, the more the dimensions of the part tend to be equal to those of the template.

Il est donc possible en faisant monter ou descendre le guide 8 par rapport au plan de travail 4 tout en maintenant en contact le gabarit 2 avec le guide 8 de régler la profondeur de passe de l'outil 6 dans la pièce 1 de façon continue.It is therefore possible by raising or lowering the guide 8 relative to the work surface 4 while keeping the template 2 in contact with the guide 8 to adjust the depth of the tool 6 in the workpiece 1 continuously.

A cet effet,comme connu le guide 6 est fixé sur une douille 9 . Afin d'obtenir un mouvement de translation verticale régulier du dit guide, une fourchette 10 est articulée à la douille 9 et est actionnée autour d'un point d'articulation 11 par un système de tout type connu, par exemple comme représenté en fig. 2 une vis 12 à pas inversé coopérant avec deux écrous 13 d'extrémité et deux ressorts 14 de rattrapage de jeu et actionnée par un boulon moleté 15 médian à la vis commandé manuellement ou bien électriquement ou par tout autre moyen connu de l'homme de l'art.To this end, as known, the guide 6 is fixed to a socket 9. In order to obtain a regular vertical translational movement of said guide, a fork 10 is articulated to the sleeve 9 and is actuated around a point of articulation 11 by a system of any known type, for example as shown in FIG. 2 a screw 12 with an inverted pitch cooperating with two end nuts 13 and two play take-up springs 14 and actuated by a knurled bolt 15 median with the screw controlled manually or else electrically or by any other means known to man of art.

Ainsi le mouvement de translation vertical de la douille 9 et du guide 8 est progressif et précis car pouvant facilement être contrôlé par exemple par une échelle graduée (non représentée) placée à proximité du moyen d'actionnement de la vis à pas inversé 12.Thus, the vertical translational movement of the sleeve 9 and of the guide 8 is progressive and precise because it can easily be controlled for example by a graduated scale (not shown) placed near the actuating means of the inverted-pitch screw 12.

L'outil 6 est préférentiellement constitué par une bande abrasive 16 sans fin tendue entre deux galets 17 et 18 d'extrémité.The tool 6 is preferably constituted by an endless abrasive belt 16 stretched between two end rollers 17 and 18.

Le galet avant 17 est entraîné par l'arbre (7) rotatif vertical sur lequel est monté fou le guide 8.The front roller 17 is driven by the vertical rotary shaft (7) on which the guide 8 is mounted.

La bande 16 est entraînée par les galets . L'utilisation d'un tel outil abrasif permet d'adjoindre à la machine des postes de travail supplémentaires.The strip 16 is driven by the rollers. The use of such an abrasive tool makes it possible to add additional workstations to the machine.

A cet effet, comme représenté en fig. 1, la table de travail 3 est dotée d'au moins un plan de travail 19 latéral pour réaliser par exemple une opération de surfaçage.To this end, as shown in fig. 1, the work table 3 is provided with at least one lateral work surface 19 to carry out for example a surfacing operation.

Cette opération de surfaçage est réalisée à l'aide d'un organe placé à l'intérieur de l'espace défini par la bande 16 entre les galets d'extrémité 17 et 18.This surfacing operation is carried out using a member placed inside the space defined by the strip 16 between the end rollers 17 and 18.

Cet organe de surfaçage représenté en fig. 3 est constitué par un sabot 20 poussant horizontalement et perpendiculairement la portion de la bande 16 se trouvant en regard d'une ouverture 21 ménagée entre deux plans d'appui 22 verticaux et lisses.This surfacing member shown in FIG. 3 is constituted by a shoe 20 pushing horizontally and perpendicularly the portion of the strip 16 lying opposite an opening 21 formed between two vertical and smooth support planes 22.

Selon une forme préférentielle de réalisation le sabot 20 reçoit une tôle élastique 23 séparant la face avant de celui-ci de la bande 16. La dite tôle comporte deux parois 24 latérales solidaires d'une âme centrale 25 de longueur et de hauteur sensiblement inférieures à celles de l'ouverture 21 et dotées chacune en leur extrémité d'une surface d'appui 26 de forme préférentiellement arrondie venant enserrer le dit sabot sur ses côtés perpendiculaires au plan de travail.According to a preferred embodiment, the shoe 20 receives an elastic sheet 23 separating the front face of the latter from the strip 16. Said sheet has two side walls 24 secured to a central core 25 of length and height substantially less than those of the opening 21 and each provided at their end with a support surface 26 of preferably rounded shape enclosing the said shoe on its sides perpendicular to the work surface.

La distance entre les deux surfaces d'appui 26 des deux parois latérales 24 lorsque la tôle élastique est séparée du sabot 20 est inférieure à la longueur du dit sabot.The distance between the two bearing surfaces 26 of the two side walls 24 when the elastic sheet is separated from the shoe 20 is less than the length of said shoe.

L'elasticité de la tôle 23 permet aux parois 24 de s'écarter l'une de l'autre en glissant sur la face avant du sabot et de venir enserrer le dit sabot sur ses côtés.The elasticity of the sheet 23 allows the walls 24 to move away from one another by sliding on the front face of the shoe and coming to grip the said shoe on its sides.

Avantageusement la tôle 23 est maintenue sur le sabot 20 par sa propre élasticité.Advantageously, the sheet 23 is held on the shoe 20 by its own elasticity.

Les surfaces d'appui 26 sont en contact d'une part avec les côtés du sabot et d'autre part avec une face perpendiculaire 27 au côté et formant avec celui-ci un-décrochement courant sur toute la hauteur du sabot 20.The bearing surfaces 26 are in contact on the one hand with the sides of the shoe and on the other hand with a face perpendicular to the side and forming with it a current recess over the entire height of the shoe 20.

En extrémité de ce décrochement dans la face 27 de celui-ci est ménagé un évidement 28 permettant le passage d'un outil plat pour pour séparer la tôle du sabot.At the end of this recess in the face 27 of the latter is provided a recess 28 allowing the passage of a flat tool for separating the sheet from the shoe.

Afin de réaliser le surfaçage une pièce est appuyée contre les plans d'appui 22 dont au moins un peut être doté d'une rallonge en regard de l'ouverture 21 et sur le plan de travail latéral 19, le sabot 20 est actionné en translation horizontale, perpendiculaire à la bande 16 par des moyens qui seront décrit plus avant, ce qui a pour effet de pousser la bande dans la dite ouverture 21 jusqu'à ce que la bande vienne en contact avec la pièce afin de l'usiner.In order to carry out the surfacing, a part is pressed against the support planes 22, at least one of which may be provided with an extension opposite the opening 21 and on the lateral work surface 19, the shoe 20 is actuated in translation horizontal, perpendicular to the strip 16 by means which will be described later, which has the effect of pushing the strip into said opening 21 until the strip comes into contact with the part in order to machine it.

La bande 16 est entraînée en rotation par les galets d'extrémité et afin de diminuer le coefficient de frottement entre la face arrière de la bande et la tôle élastique 23 celle-ci est recouverte d'un revêtement 29 dotée sur sa face en contact avec la bande d'une surface anti-friction diminuant ainsi la résistance au mouvement de la bande.The strip 16 is rotated by the end rollers and in order to reduce the coefficient of friction between the rear face of the strip and the elastic sheet 23 the latter is covered with a coating 29 provided on its face in contact with the band with an anti-friction surface thus reducing the resistance to movement of the band.

Les moyens d'actionnement du sabot 20 sont constitués selon un exemple préférentiel de réalisation représenté en fig. 3 par une vis 30 blo- quée en translation par exemple des circlips dans une chape 31 et coopérant par un orifice fileté 32.The means for actuating the shoe 20 are constituted according to a preferred embodiment shown in FIG. 3 by a screw 30 b locked in translation, for example circlips in a yoke 31 and cooperating by a threaded orifice 32.

En actionnant la vis 30 de préférence manuellement le sabot 20 est animé d'un mouvement de translation.By actuating the screw 30 preferably manually the shoe 20 is driven in a translational movement.

Il va de soi que le dit sabot est guidé par tous moyens connus de l'homme de l'art.It goes without saying that the said shoe is guided by any means known to those skilled in the art.

De plus afin de rattraper les jeux des ressorts 33 s'appuyent d'une part sur la chape 31 et sur le sabot 20.In addition, in order to make up for the play of the springs 33 are supported on the one hand on the yoke 31 and on the shoe 20.

Ces ressorts 33 sont de préférence au nombre de quatre symétriquement disposés par rapport aux axes longitudinaux et transversaux du dit sabot et sont avantageusement placés dans des logements 34 ménagés dans la chape 31 et dans la face arrière du sabot 20.These springs 33 are preferably four in number symmetrically arranged with respect to the longitudinal and transverse axes of said shoe and are advantageously placed in housings 34 formed in the yoke 31 and in the rear face of the shoe 20.

De plus le plan de travail .latéral 19 pour le surfaçage est de préférence articulé à un axe transversal à la table de travail 3 sur toute sa longueur afin de pouvoir surfacer des pièces présentant des angles supérieurs ou inférieurs à 90° entre la surface à usiner et la surface d'appui sur le dit plan.In addition, the side work surface 19 for surfacing is preferably articulated to an axis transverse to the work table 3 over its entire length in order to be able to surface parts having angles greater than or less than 90 ° between the surface to be machined. and the bearing surface on said plane.

Au niveau des plans de travail latéraux 19 des barres articulées perpendiculairement à la table de travail 3 permettent l'apposition de rallonges afin d'obtenir un plan de travail plus grand.At the lateral work surfaces 19 bars hinged perpendicular to the work table 3 allow the affixing of extensions to obtain a larger work surface.

Suivant un mode préférentiel de réalisation, la bande 16, les galets d'extrémité 17 et 18, leurs mécanisme et le guide 8 d'entrainement constituent un bâti 3B mobile verticalement par rapport au bâti 3A portant le ou les plans de travail.According to a preferred embodiment, the strip 16, the end rollers 17 and 18, their mechanism and the drive guide 8 constitute a frame 3B movable vertically with respect to the frame 3A carrying the work plan (s).

Selon cette forme de réalisation, le réglage de la profondeur de passe de la bande 16 sur le rouleau avant 17 dans la pièce 1 ne se fait pas par le système précédemment décrit mais en choississant ou en élevant le bâti 3B par rapport au plan de travail, tout en maintenant le gabarit 2 contre le guide 8 monté fou sous le galet 17.According to this embodiment, the adjustment of the depth of pass of the strip 16 on the front roller 17 in the part 1 is not done by the system previously described but by choosing or raising the frame 3B relative to the work plan , while maintaining the template 2 against the guide 8 mounted idly under the roller 17.

De plus la mobilité dans le sens vertical du dit bâti 3B permet d'une part de surfacer des pièces de grande hauteur et permet d'autre part de répartir l'usure sur toute la largeur de la dite bande 16. L'actionnement en translation verticale du bâti 3B est réalisée par tous moyens de levage connus de l'homme de l'art par exemple une vis sans fin coopérant avec deux branches soulevant le bâti 3B en trois points, le dit bâti 3B étant doté sur ses côtés de trois galets à gorge roulant librement sur des glissières verticales solidaires du bâti 3A.In addition, the mobility in the vertical direction of said frame 3B makes it possible, on the one hand, to surface very tall parts and, on the other hand, allows wear to be distributed over the entire width of said strip 16. Actuation in translation vertical of the frame 3B is produced by any lifting means known to those skilled in the art, for example an endless screw cooperating with two branches lifting the frame 3B at three points, the said frame 3B being provided on its sides with three rollers grooved freely moving on vertical slides integral with the frame 3A.

La dite vis sans fin est commandée manuellement ou électriquement ou par tout autre moyen connu de l'homme de l'art.Said worm is controlled manually or electrically or by any other means known to those skilled in the art.

IJne règle graduée proche du moyen d'actionnement de la vis sans fin permet de contrôler la régularité et la précision du mouvement vertical du bâti 3B et donc de la profondeur de passe de l'outil dans le contour de la pièce à usiner et de la répartition de l'usure de la bande abrasive 16.IJne graduated rule close to the actuating means of the worm allows to control the regularity and the precision of the vertical movement of the frame 3B and therefore of the depth of the tool pass in the contour of the workpiece and the distribution of wear on the abrasive belt 16.

La répartition de l'usure est d'autre part maitrisée par un système d'oscillation agissant sur le galet 18 arrière afin de doter la bande abrasive 16 d'un mouvement vertical alternatif sur le galet avant 17.The distribution of wear is also controlled by an oscillation system acting on the rear roller 18 in order to provide the abrasive belt 16 with an alternating vertical movement on the front roller 17.

De plus ce mouvement d'oscillation permet de maintenir efficacement la bande 16 sur les galets 17 et 18.In addition, this oscillation movement effectively maintains the strip 16 on the rollers 17 and 18.

Ce mouvement d'oscillation est réalisé à partir d'un circuit pneumatique représenté en fig. 5.This oscillation movement is carried out from a pneumatic circuit shown in fig. 5.

Ce circuit pneumatique comprend d'une part des moyens de mise en tension de la bande 16 entre les galets 17 et 18 et d'autre part des moyens d'oscillation permettant le mouvement vertical alternatif de la bande 16 sur le galet avant 17.This pneumatic circuit comprises, on the one hand, means for tensioning the strip 16 between the rollers 17 and 18 and, on the other hand, oscillation means allowing the reciprocating vertical movement of the strip 16 on the front roller 17.

Les moyens de mise en tension de la bande 16 représenté en fig. 4 sont constitués d'au moins un verin 37 du type par exemple à simple effet et rappel par ressort dont la tige 38 est fixée perpendiculairement et parallèlement à l'axe longitudinal de la bande sur la partie médiane d'une chape 39 supportant l'arbre 40 sur lequel est monté le galet arrière 18.The means for tensioning the strip 16 shown in FIG. 4 consist of at least one cylinder 37 of the type for example single acting and spring return whose rod 38 is fixed perpendicularly and parallel to the longitudinal axis of the strip on the middle part of a yoke 39 supporting the shaft 40 on which the rear roller 18 is mounted.

La tension de la bande 16 est réglable par un robinet placé sur le circuit pneumatique et agissant sur la pression régnant dans la cham- bre du verin.The tension of the belt 16 is adjustable by a valve placed on the pneumatic circuit acting on the pressure in the cham- ber of the cylinder.

Il va de soi que le circuit pneumatique est doté d'un régulateur de pression 41 , d'un régulateur de débit 42 et d'une lubrification 43 montés en amont du verin 37.It goes without saying that the pneumatic circuit is provided with a pressure regulator 41, a flow regulator 42 and a lubrication 43 mounted upstream of the actuator 37.

La machine comporte au moins deux bandes abrasives 16 et donc il va de soi que les éléments du circuit pneumatique sont égal au nombre de bandes.The machine comprises at least two abrasive bands 16 and therefore it goes without saying that the elements of the pneumatic circuit are equal to the number of bands.

Les moyens d'oscillation représentés en fig.4 sont constitués par un verin 44 du type par exemple à double effet solidaire par sa tige à une bande 45 fixée à la chape 39 et située dans le prolongement de l'arbre 40 portant le galet arrière 18.The oscillation means shown in fig. 4 are constituted by a jack 44 of the type, for example with double effect secured by its rod to a band 45 fixed to the yoke 39 and situated in the extension of the shaft 40 carrying the rear roller. 18.

L'axe du verin 44 est perpendiculaire à l'axe longitudinal de la bande 16.The axis of the jack 44 is perpendicular to the longitudinal axis of the strip 16.

Le dit verin 44 agit sur la barre 45, la tige 38 du verin de mise en tension 37 constitue un axe de pivotement et donc le mouvement du verin 44 entraîne un mouvement oscillatoire circulaire par rapport à la tige 38 du verin 37.Said cylinder 44 acts on the bar 45, the rod 38 of the tensioning cylinder 37 constitutes a pivot axis and therefore the movement of cylinder 44 causes a circular oscillatory movement relative to the rod 38 of cylinder 37.

Ce mouvement oscillatoire est permis par deux capteurs 46 situés derrière la bande abrasive 16 et préférentiellement sur la partie avant de la dite bande.This oscillatory movement is allowed by two sensors 46 located behind the abrasive belt 16 and preferably on the front part of said band.

Ces capteurs sont de préférence du type à fuite constante évitant ainsi l'aspiration de poussières susceptibles d'obturer le circuit pneumatique.These sensors are preferably of the constant leakage type, thus avoiding the suction of dust liable to block the pneumatic circuit.

Les dits capteurs sont placés suivant un même axe vertical.Said sensors are placed along the same vertical axis.

Lorsque la fuite d'un des capteur 46 est arrêtée par._la bande abrasive 16, ceci donne une information à un amplificateur différentiel 47 apte à établir une différence entre la pression du circuit pneumatique et la pression provenant d'un capteur 46.When the leakage of one of the sensors 46 is stopped by the abrasive belt 16, this gives information to a differential amplifier 47 capable of establishing a difference between the pressure of the pneumatic circuit and the pressure coming from a sensor 46.

Chaque capteur 46 est relié à un amplificateur 47.Each sensor 46 is connected to an amplifier 47.

Le dit amplificateur 47 envoie une information sous forme d'impulsion à un distributeur 48 par exemple du type à cinq orifices et deux positions qui permet de dévier le flux pneumatique dans l'une des chambres du verin 44.Said amplifier 47 sends information in the form of an impulse to a distributor 48, for example of the type with five orifices and two positions which makes it possible to deflect the pneumatic flow in one of the chambers of the jack 44.

Ainsi le verin 44 agit sur la barre 45 ce qui a pour effet de faire pivoter le galet arrière 18 par rapport à la tige 38 du verin 37.Thus the jack 44 acts on the bar 45 which has the effect of making the rear roller 18 pivot relative to the rod 38 of the jack 37.

Ce pivotement entraîne la montée ou la descente de la bande sur le galet avant 17.This pivoting causes the strip to go up or down on the front roller 17.

Lorsque la bande 16 arrête la fuite de l'autre capteur 46 le phénomène décrit précédemment se reproduit.When the strip 16 stops the leakage from the other sensor 46 the phenomenon described above is repeated.

Il va de soi que le circuit pneumatique est doté d'éléments indispensables à son fonctionnement connu de l'homme de l'art.It goes without saying that the pneumatic circuit is provided with elements essential to its operation known to those skilled in the art.

D'autre part l'alimentation des capteurs 46, des amplificateurs 47 n'est pas de préférence lubrifiée contrairement au distributeurs 48 et aux verins 44.On the other hand, the supply of the sensors 46, of the amplifiers 47 is preferably not lubricated, unlike the distributors 48 and the jacks 44.

Afin de répartir l'usure de la bande abrasive 16 et de régler sa hauteur de travail les capteurs sont mobiles verticalement simultanément ou non et indépendamment de la mobilité du bâti 3B.In order to distribute the wear of the abrasive belt 16 and to adjust its working height, the sensors are movable vertically simultaneously or not and independently of the mobility of the frame 3B.

A cet effet, comme représenté en fig. 6, les capteurs sont montés sur un coulisseau 49 mobile sur une glissière 50 solidaire du bâti 3B com me représenté en fig.To this end, as shown in fig. 6, the sensors are mounted on a slide 49 movable on a slide 50 secured to the frame 3B as shown in FIG.

L'actionnement du coulisseau 49 sur la glissière 50 peut se faire parThe actuation of the slide 49 on the slide 50 can be done by

un bouton moleté 51 actionné par exemple manuellement et à proximité duquel peut être adjointe une échelle graduée.a knurled button 51 actuated for example manually and near which a graduated scale can be added.

La mobilité des capteurs 46 permet d'une part de faire varier l'ampli- tude du mouvement vertical de la bande abrasive 16 sur le galet avant 17 et devant l'ouverture 21 par surfaçage afin de répartir l'usure deThe mobility of the sensors 46 makes it possible on the one hand to vary the amplitude of the vertical movement of the abrasive strip 16 on the front roller 17 and in front of the opening 21 by surfacing in order to distribute the wear of

la dite bande sur toute sa largeur et d'autre part d'adapter la machine à différentes largeurs de bandes abrasive 16.the said strip over its entire width and on the other hand to adapt the machine to different widths of abrasive strips 16.

La mobilité verticale des capteurs 46 simultanément et indépendamment du bâti 3B permet de régler la position de travail de la bande abrasive 16 par rapport à la pièce à usiner.The vertical mobility of the sensors 46 simultaneously and independently of the frame 3B makes it possible to adjust the working position of the abrasive belt 16 relative to the workpiece.

La machine selon l'invention permet d'obtenir une profondeur de passe dans la pièce, régulière et précise de façon continue, d'y adjoindre des postes de travail supplémentaires et de répartir l'usure de l'outil sur toute sa largeur.The machine according to the invention makes it possible to obtain a continuous and precise depth of cut in the workpiece continuously, to add additional workstations to it and to distribute the wear of the tool over its entire width.

Il va de soi que la présente invention peut recevoir tout aménagements et toutes variantes sans pour antant sortir du cadre du présent certificat d'addition.It goes without saying that the present invention can receive all arrangements and all variants without however departing from the scope of this addition certificate.

Claims (7)

R1/ Machine à outil rotatif pour les travaux de reproduction ou de finition et notamment pour l'usinage du contour d'une pièce (1) fixée à plat au dessus d'un gabarit (2) de reproduction, la dite machine étant constituée d'un bâti (3A) sur lequel est montée une table de travail (4) fixe par rapport au sol dotée d'au moins un , plan de travail (5) horizontal dans la zone duquel est situé ou partiellement situé au moins un outil (6) fixe sur un arbre (7) rotatif, vertical sensiblement au dessus d'un guide (8) doté de moyens susceptibles de maintenir l'ensemble gabarit pièce à usiner à différentes distances de l'outil (6) en sorte de permettre sans déplacement du gabarit (2) par rapport à la pièce (1) plusieurs passes d'usinage du contour de la dite pièce à des profondeurs différentes selon la forme du contour du dit gabarit (2), le dit guide 8 étant monté fou sur le même axe que l'outil et coopérant avec le bord du gabarit (2), l'ensemble gabarit pièce étant mobile sur le plan de travail, machine caractérisée en ce que le guide (8) présente la forme d'un tronc de cône dont le plus petit diamètre est égal ou sensiblement égal au diamètre de l'outil (6) afin d'obtenir des profondeurs de passes variables de l'outil (6) dans la pièce (1) de façon continue.R1 / Rotary tool machine for reproduction or finishing work and in particular for machining the contour of a part (1) fixed flat above a reproduction template (2), said machine being made up of '' a frame (3A) on which is mounted a work table (4) fixed relative to the ground provided with at least one, horizontal work plan (5) in the area of which is located or partially located at least one tool ( 6) fixed on a rotary shaft (7), vertical substantially above a guide (8) provided with means capable of holding the workpiece jig assembly at different distances from the tool (6) so as to allow without displacement of the template (2) relative to the part (1) several passes for machining the contour of said part to different depths depending on the shape of the contour of said template (2), said guide 8 being mounted idly on the same axis as the tool and cooperating with the edge of the template (2), the piece template assembly being movable on the work surface , machine characterized in that the guide (8) has the shape of a truncated cone whose smallest diameter is equal to or substantially equal to the diameter of the tool (6) in order to obtain variable depths of pass from l tool (6) in the part (1) continuously. R2/ Machine à outil rotatif selon la revendication 1 caractérisée en ce que la table de travail (4) est dotée d'au moins un plan de travail (19) latéral, articulé pour réaliser une opération de surfaçage.R2 / Rotary tool machine according to claim 1 characterized in that the work table (4) is provided with at least one lateral work surface (19), articulated to perform a surfacing operation. R3/ Machine à outil rotatif selon la revendication 1 caractérisée en ce que le bâti (3A) portant le ou les plans de travail est fixe par rapport au sol et qu'elle comporte un bâti 3B doté de moyens permettant l'abaissement et l'élévation de l'outil rotatif et de son mécanisme d'entraînement par rapport aux plans de travail en sorte d'une part de régler la profondeur de passe de l'outil (6) dans la pièce (1) de façon continue et d'autre part de répartir l'usure de l'outil sur toute sa largeur.R3 / Rotary tool machine according to claim 1 characterized in that the frame (3A) carrying the work surface (s) is fixed relative to the ground and that it comprises a frame 3B provided with means allowing the lowering and elevation of the rotary tool and its drive mechanism relative to the work planes so as to firstly adjust the depth of the tool (6) in the workpiece (1) continuously and on the other hand to distribute the wear of the tool over its entire width. R4/ Machine à outil rotatif selon les revendications 1 et 2 dotée d'au moins un moyen de surfaçage constitué d'un sabot (20) poussant la bande abrasive (16) dans une ouverture (21) ménagée du côté d'un plan de travail (19) latéral caractérisé en ce que le sabot (20) reçoit une tôle élastique (23) amovible, recouverte d'un revêtement (29) doté sur sa face en contact avec la bande (16) d'une surface anti-friction, séparant la face avant du dit sabot de la dite bande (16) et comportent deux parois latérales (24) solidaires d'une ame centrale (25) de longueur et de hauteur inférieures à celles de l'ouverture (21) et dotées chacune en leur extrémité d'une surface d'appui (26) venant enserrer le dit sabot sur ses côtés perpendiculaires au plan de travail.R4 / Rotary tool machine according to claims 1 and 2 provided with at least one surfacing means consisting of a shoe (20) pushing the abrasive strip (16) into an opening (21) formed on the side of a plane of lateral work (19) characterized in that the shoe (20) receives a removable elastic sheet (23), covered with a coating (29) provided on its face in contact with the strip (16) with an anti-friction surface , separating the front face of said shoe from said strip (16) and comprise two side walls (24) integral with a central core (25) of length and height less than those of the opening (21) and each provided at their end of a bearing surface (26) enclosing said shoe on its sides perpendicular to the work surface. R5/ Machine selon la revendication 1 dotée d'au moins un verin (37) pour la mise en tension de l'outil et d'au moins un verin (44) permettant un mouvement alternatif de monte et baisse de la bande (16) par rapport à la pièce (1) les dits verins étant alimentés et commandés par un circuit pneumatique, caractérisée en ce que le dit circuit pneumatique comporte au moins deux capteurs (46) à fuite propre et constante placés sur un même axe vertical au moins deux amplificateurs (47) différentiels recevant une information des dits capteurs et commandant au moins un distributeur (48) agissant sur le mouvement d'au moins un verin (44) permettant le mouvement alternatif vertical de la bande (16) par rapport à la pièce (7).R5 / Machine according to claim 1 provided with at least one jack (37) for tensioning the tool and at least one jack (44) allowing an alternating movement of raising and lowering of the strip (16) with respect to the part (1) the said jacks being supplied and controlled by a pneumatic circuit, characterized in that the said pneumatic circuit comprises at least two sensors (46) with clean and constant leakage placed on the same vertical axis at least two differential amplifiers (47) receiving information from said sensors and controlling at least one distributor (48) acting on the movement of at least one actuator (44) allowing the reciprocating vertical movement of the strip (16) relative to the part ( 7). R6/ Machine à outil rotatif selon les revendications 1 et 5 caractérisée en ce que les capteurs 46 sont mobiles, verticalement sur un même axe,simultanément ou non et independamment de la mobilité du bâti 38 afin d'une part de pouvoir s'adapter à différentes largeurs de bandes (16) et d'autre part de pouvoir régler la position de la bande par rapport aux plans de travail.R6 / Rotary tool machine according to claims 1 and 5 characterized in that the sensors 46 are movable, vertically on the same axis, simultaneously or not and independently of the mobility of the frame 38 so as to be able to adapt to different widths of strips (16) and secondly to be able to adjust the position of the strip relative to the work planes. R7/ Machine à outil rotatif selon les revendications 1,5 et 6 caractérisée en ce que les capteurs (46) sont montés sur au moins un coulisseau (49) mobile verticalement sur au moins une glissière (50) solidaire du bâti (38).R7 / Rotary tool machine according to claims 1,5 and 6 characterized in that the sensors (46) are mounted on at least one slide (49) movable vertically on at least one slide (50) integral with the frame (38).
EP82401778A 1982-09-29 1982-09-29 Machine with turning tool for reproduction and finishing work and especially for treating the outline of a piece fitted on a reproduction template Withdrawn EP0104291A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP82401778A EP0104291A1 (en) 1982-09-29 1982-09-29 Machine with turning tool for reproduction and finishing work and especially for treating the outline of a piece fitted on a reproduction template
ES526039A ES8406265A1 (en) 1982-09-29 1983-09-28 Machine with turning tool for reproduction and finishing work and especially for treating the outline of a piece fitted on a reproduction template.

Applications Claiming Priority (1)

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EP82401778A EP0104291A1 (en) 1982-09-29 1982-09-29 Machine with turning tool for reproduction and finishing work and especially for treating the outline of a piece fitted on a reproduction template

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EP0104291A1 true EP0104291A1 (en) 1984-04-04

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ES8406265A1 (en) 1984-08-01

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