EP1038633B1 - Apparatus for machining workpieces by grinding, specially for superfinishing - Google Patents

Apparatus for machining workpieces by grinding, specially for superfinishing Download PDF

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Publication number
EP1038633B1
EP1038633B1 EP00400755A EP00400755A EP1038633B1 EP 1038633 B1 EP1038633 B1 EP 1038633B1 EP 00400755 A EP00400755 A EP 00400755A EP 00400755 A EP00400755 A EP 00400755A EP 1038633 B1 EP1038633 B1 EP 1038633B1
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EP
European Patent Office
Prior art keywords
advance
guide
abrasive
application head
rod
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EP00400755A
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German (de)
French (fr)
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EP1038633A1 (en
Inventor
Laurent Pineau
Richard Bonachera
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SPMS Honimatic
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SPMS Honimatic
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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
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor

Definitions

  • the present invention relates to a set of machining parts by abrasive, especially superfinishing according to the preamble of claim 1, comprising an abrasive application head against a workpiece, guide means, in advance and pressing the application head against the workpiece, and means for fixing the assembly on a support.
  • abrasive application head against a workpiece comprising guide means, in advance and pressing the application head against the workpiece, and means for fixing the assembly on a support.
  • guide means in advance and pressing the application head against the workpiece, and means for fixing the assembly on a support.
  • US-A-4,575,972 An example of such an assembly is shown in US-A-4,575,972.
  • abrasive belt superfinishing units which are limited to abrasive functions and are intended to be mounted for example on a lathe, in place of a tool holder, or on a bench for the creation of a special superfinishing machine simple, efficient and inexpensive.
  • a unitary assembly comprising an abrasive belt application head, means for advancing and thrusting the application head, means for scrolling the abrasive belt. , as well as the corresponding drive and control means.
  • the assembly comprises a casing inside which are grouped the means of advance and pressure of the application head and the drive and control means, which casing bearing on one lateral side means for fixing it on a support and bearing on the opposite lateral side, the abrasive application head and the winding and winding coils of the abrasive belt passing over the application head.
  • this unit unit known is relatively large, so bulky, bulky, and heavy, so difficult to transport and also to mount, for example on a tower where the available space is often restricted.
  • the abrasive application head is cantilevered with respect to the fastening means of the assembly on the support and also with respect to the means guide, advance and pressure of the head, located inside the housing. This results in a lack of precision to which even an oversizing necessarily resulting in an increase in weight and cost would only provide an imperfect solution.
  • the present invention relates to a set of machining parts by abrasive which is distinguished by an architecture to both increase the accuracy and reduce the volume, therefore the size and weight of all and, therefore , to simplify the transport as well as the mounting on a support.
  • the set of machining parts by abrasive, including superfinishing, object of the invention comprises the features of claim 1.
  • an application head of an abrasive against a workpiece means of advance and pressure of the abrasive application head against the workpiece and means for fixing the assembly on a support.
  • the abrasive application head and the advance and pressure means of the head are aligned.
  • the machining assembly can be very narrow, so that the overhang that can exist between the abrasive application head and the attachment means of the assembly on the support can be very small.
  • the machining assembly according to the invention can have a particularly simple structure in that the means of guidance, advance and pressure of the application head comprise a fluid cylinder whose cylinder is secured to an advance guide which carries the fixing means and wherein the piston rod of the cylinder is movable in translation axial being immobilized angularly.
  • the machining assembly comprises oscillation means of the application head, to animate the latter with an oscillation movement perpendicular to the direction of advance and pressure.
  • Said oscillation means comprise, between the plunger rod of the feed and pressure ram and the abrasive application head, an oscillation guide and an oscillation rod mounted to move in axial translation in said guide of oscillation. oscillation being immobilized angularly in the latter, a first of these elements, preferably the oscillation rod, being integral with the piston rod of the advance and pressure ram and the second element, preferably the guide of oscillation, being integral with the abrasive application head such that the axis of oscillation is perpendicular to the axis of advance and pressure.
  • the assembly further comprises driving means for animating one of the oscillation elements, preferably the oscillation guide, with oscillation movement along its axis.
  • the piston rod of the advance and pressure cylinder is hollow and traversed by a drive shaft acting by an eccentric system on the oscillation guide to animate the latter of an oscillation movement.
  • the piston rod of the advance and pressure cylinder is advantageously a square rod mounted to move axially in a guide constituted by a socket of square section.
  • the combination of such a rod and such a socket which can also be chosen advantageously for the two elements of the oscillation means, automatically ensures the angular immobilization of the rod relative to the sleeve, and vice versa.
  • the square section bushing may be a rolling bushing, in particular a ball bushing.
  • a rolling bushing in particular a ball bushing.
  • Such square ball bushings that provide high precision guidance, high load capacity and low friction, are well known and are marketed, for example, by the company TECHNOMETAL under the name "SOCKET BALLS QUAD”.
  • the machining assembly can be used either for honing machining, with an agglomerated abrasive attached to the application head, or for abrasive belt machining, in which case machining assembly is completed by an abrasive belt scrolling system during machining comprising a new web rewinding reel, a used web rewinding reel, and a rotation spooling system of the rewinding spool , the abrasive application head comprising a bearing roller which applies the abrasive belt against the workpiece.
  • the unwinding reel is advantageously mounted on the abrasive application head so as to participate in the oscillation movement of this head.
  • both the unwinding reel and the abrasive belt winding reel are movable in translation in the direction of advance with the abrasive application head. This ensures that the abrasive belt always has a constant tension, regardless of the forward (and backward) movements of the application head.
  • the abrasive machining assembly into two modules, namely a module machining unit which groups together the abrasive application head, the guide, advance and pressure means of this head and, where appropriate, the abrasive belt running means, and a motorization module and power supply which groups together all the drive motors and the control and power supply means, the two modules being able to be coupled by flexible disconnectable connection means, namely flexible hoses for feeding the advance and thrust ram, a flexible shaft for the oscillation of the abrasive application head and, where appropriate, a flexible shaft for the abrasive belt.
  • This dividion makes it possible to obtain two relatively light modules that are easy to transport, and the machining module, because of the absence of any incorporated means of motorization, can be even more compact and therefore easier to mount on a given support. .
  • an abrasive machining assembly in this case a continuously running abrasive belt superfinishing assembly, comprises a machining module 1 and a motorization, control and feeding module 2.
  • two modules 1 and 2 are interconnected by flexible and disconnectable connecting means consisting of two flexible pipes 3, a first flexible shaft 4 and a second flexible shaft 5.
  • the module 2 shown in the form of a bag 6 with a carrying handle 7 encloses pressurized fluid supply means (not shown), an electric motor 8 and a geared motor 9.
  • the machining module 1 comprises a guide 10 in the form of a square ball socket serving as a guide for a rod 11 of square outer profile.
  • the cylinder 12 of a fluid cylinder is connected to the rear end of the guide 10 or an intermediate piece 10a interposed between the cylinder 12 and the guide 10, the piston rod 13 of this jack being constituted by the extension towards the back of the rod 11 mounted in the guide 10.
  • the rod 11 is hollow and is traversed by a drive shaft 14 which drives, at the front end of the rod 11, an eccentric system 15.
  • the eccentric system 15 prints, under the effect of the rotation of the shaft 14, a linear oscillation movement to a guide 16 constituted by a square ball bushing mounted to move in translation along an axis perpendicular to the axis of the rod 11, on a square rod 17 fixed by a yoke 18 to the front end of the rod 11.
  • the guide 16 carries, via a clevis 19, a pressure roller 20 whose function is to apply against a workpiece not shown, in particular a piece of revolution nentra fine interée in rotation about its axis, an abrasive belt 21 which is removed from a reeling reel 22 and passes on the roller 20, under the winding movement printed to a winding reel 23 by a gearbox 24.
  • the two coils 22 and 23 are mounted, one at the front on the guide 16 via a support 25 and the other at the rear on the rod 11 by means of a support 26 so as to participate both in the translation movements produced by the jack 12, 13, the coil 22 further participating in the oscillation movement communicated to the pressure roller 20 by the eccentric system 15.
  • the unwinding reel 22 comprises a braking system 27 (see FIG. 6) by which the abrasive belt 21 always remains stretched between the unwinding reel 22 and the winding reel 23.
  • the flexible hoses 3 going from the module 2 to the module 1 serve to supply fluid to the jack 12, 13.
  • the flexible shaft 4 transmits the rotational movement of the motor 8 to the shaft 14, thus to the eccentric system 15.
  • the flexible shaft 5 transmits the rotational movement of the geared motor 9 to the gearbox 24 serving to drive the winding spool 23.
  • the fixing of the machining module 1 on a support is carried out, for example by fastening means 28 provided laterally on the guide 10 or on the intermediate piece 10a, or on one side, as shown in solid lines in the figures 2, 4 and 5, on the opposite side.
  • the gearbox 24 for driving the winding spool 23 may be arranged either on one side or the other of this spool, as shown in solid lines and in phantom in FIGS. 4.
  • the machining module 1 has a remarkable architecture in particular by the alignment of the abrasive application head (pressure roller 20), guide means (guide 10, rod 11) and means of advance and of push (cylinder 12, 13), hence an absence of cantilever between these elements and a very small overhang of the abrasive application head (20) relative to the fastening means 28 .
  • the cylinder 12, 13 is circular section could be replaced by one or two rectangular cylinders, of known type per se, interposed (s) directly between the guide 10 and the support 26 of the coil 23, these rectangular cylinders adapt better to the rectangular shape of the guide 10.
  • the flexible shaft connections 4, 5 between the two modules 1, 2 could be omitted and the drive motors can be transferred to the module 1, in the case where the congestion and weight problems of the module 1 would be considered less penalizing.

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

Abstract

The finish grinding machine (1) has a supply or unwinding reel (22) from which the abrasive tape (21) passes over several rollers on a frame (25) to a take-up reel (23). A large roller (20) on the frame presses the tape against the surface of the workpiece. An actuator (10-14) pushes the pressure roller toward the workpiece.

Description

La présente invention se rapporte à un ensemble d'usinage de pièces par abrasif, notamment de superfinition selon le préambule de la revendication 1, comprenant une tête d'application d'abrasif contre une pièce à usiner, des moyens de guidage, d'avance et de pression de la tête d'application contre la pièce à usiner, ainsi que des moyens de fixation de l'ensemble sur un support. Un exemple d'un tel ensemble est représenté par le document US-A-4 575 972.The present invention relates to a set of machining parts by abrasive, especially superfinishing according to the preamble of claim 1, comprising an abrasive application head against a workpiece, guide means, in advance and pressing the application head against the workpiece, and means for fixing the assembly on a support. An example of such an assembly is shown in US-A-4,575,972.

En dehors de machines complètes d'usinage de pièces par abrasif qui comprennent tous les moyens nécessaires pour supporter et entraîner une pièce à usiner et pour faire agir un abrasif sur la pièce, il existe des unités de superfinition par bande abrasive à défilement automatique, qui se limitent aux fonctions concernant l'abrasif et sont destinées à être montées par exemple sur un tour, à la place d'un porte-outil, ou sur un banc en vue de la création d'une machine spéciale de superfinition simple, performante et peu coûteuse.Apart from complete machines for machining abrasive workpieces which include all the means necessary to support and drive a workpiece and to operate an abrasive on the workpiece, there are self-scrolling abrasive belt superfinishing units which are limited to abrasive functions and are intended to be mounted for example on a lathe, in place of a tool holder, or on a bench for the creation of a special superfinishing machine simple, efficient and inexpensive.

Des unités de ce type sont commercialisées depuis de nombreuses années par la demanderesse sous la dénomination MBA-DA.Units of this type have been marketed for many years by the applicant under the name MBA-DA.

Ces unités connues destinées en particulier à la superfinition de pièces de révolution constituent un ensemble unitaire comprenant une tête d'application de bande abrasive, des moyens d'avance et de poussée de la tête d'application, des moyens de défilement de la bande abrasive, ainsi que les moyens d'entraînement et de commande correspondants. L'ensemble comprend un carter à l'intérieur duquel sont regroupés les moyens d'avance et de pression de la tête d'application ainsi que les moyens d'entraînement et de commande, ce carter portant sur un côté latéral des moyens pour sa fixation sur un support et portant sur le côté latéral opposé, la tête d'application d'abrasif et les bobines de dévidage et de renvidage de la bande abrasive passant sur la tête d'application.These known units intended in particular for the superfinishing of pieces of revolution constitute a unitary assembly comprising an abrasive belt application head, means for advancing and thrusting the application head, means for scrolling the abrasive belt. , as well as the corresponding drive and control means. The assembly comprises a casing inside which are grouped the means of advance and pressure of the application head and the drive and control means, which casing bearing on one lateral side means for fixing it on a support and bearing on the opposite lateral side, the abrasive application head and the winding and winding coils of the abrasive belt passing over the application head.

Compte tenu de tous les moyens qu'il regroupe à l'intérieur de son carter, cet ensemble unitaire connu est relativement large, donc volumineux, encombrant, et lourd, donc difficile à transporter et également à monter, par exemple sur un tour où la place disponible est souvent restreinte. De plus, du fait de l'architecture choisie pour cet ensemble connu, la tête d'application d'abrasif se trouve en porte-à-faux par rapport aux moyens de fixation de l'ensemble sur le support et également par rapport aux moyens de guidage, d'avance et de pression de la tête, situés à l'intérieur du carter. Il en résulte un manque de précision auquel même un surdimensionnement entraînant obligatoirement un accroissement du poids et du coût n'apporterait qu'une solution imparfaite.Given all the resources it includes inside its housing, this unit unit known is relatively large, so bulky, bulky, and heavy, so difficult to transport and also to mount, for example on a tower where the available space is often restricted. In addition, because of the architecture chosen for this known assembly, the abrasive application head is cantilevered with respect to the fastening means of the assembly on the support and also with respect to the means guide, advance and pressure of the head, located inside the housing. This results in a lack of precision to which even an oversizing necessarily resulting in an increase in weight and cost would only provide an imperfect solution.

La présente invention vise un ensemble d'usinage de pièces par abrasif qui se distingue par une architecture permettant à la fois d'accroître la précision et de diminuer le volume, donc l'encombrement et le poids de l'ensemble et, de ce fait, de simplifier le transport ainsi que le montage sur un support.The present invention relates to a set of machining parts by abrasive which is distinguished by an architecture to both increase the accuracy and reduce the volume, therefore the size and weight of all and, therefore , to simplify the transport as well as the mounting on a support.

L'ensemble d'usinage de pièces par abrasif, notamment de superfinition, objet de l'invention, comprend les caractéristiques de la revendication 1. Entre autres une tête d'application d'un abrasif contre une pièce à usiner, des moyens d'avance et de pression de la tête d'application d'abrasif contre la pièce à usiner et des moyens de fixation de l'ensemble sur un support. La tête d'application d'abrasif et les moyens d'avance et de pression de la tête sont alignés.The set of machining parts by abrasive, including superfinishing, object of the invention comprises the features of claim 1. Among others an application head of an abrasive against a workpiece, means of advance and pressure of the abrasive application head against the workpiece and means for fixing the assembly on a support. The abrasive application head and the advance and pressure means of the head are aligned.

Grâce à cet alignement, aucun porte-à-faux n'existe entre la tête d'application d'abrasif et les moyens d'avance et de pression de cette tête. L'ensemble d'usinage peut être très étroit, de sorte que le porte-à-faux pouvant exister entre la tête d'application d'abrasif et les moyens de fixation de l'ensemble sur le support peut être très réduit.Thanks to this alignment, no overhang exists between the abrasive application head and the means of advance and pressure of this head. The machining assembly can be very narrow, so that the overhang that can exist between the abrasive application head and the attachment means of the assembly on the support can be very small.

L'ensemble d'usinage conforme à l'invention peut présenter une structure particulièrement simple par le fait que les moyens de guidage, d'avance et de pression de la tête d'application comprennent un vérin à fluide dont le cylindre est solidaire d'un guide d'avance qui porte les moyens de fixation et dans lequel la tige de piston du vérin est mobile en translation axiale en étant immobilisée angulairement.The machining assembly according to the invention can have a particularly simple structure in that the means of guidance, advance and pressure of the application head comprise a fluid cylinder whose cylinder is secured to an advance guide which carries the fixing means and wherein the piston rod of the cylinder is movable in translation axial being immobilized angularly.

L'ensemble d'usinage comprend des moyens d'oscillation de la tête d'application, pour animer cette dernière d'un mouvement d'oscillation perpendiculairement à la direction d'avance et de pression. Lesdits moyens d'oscillation comprennent, entre la tige de piston du vérin d'avance et de pression et la tête d'application d'abrasif, un guide d'oscillation et une tige d'oscillation montée mobile en translation axiale dans ledit guide d'oscillation en étant immobilisée angulaire ment dans ce dernier, un premier de ces éléments, de préférence la tige d'oscillation, étant solidaire de la tige de piston du vérin d'avance et de pression et le second élément, de préférence le guide d'oscillation, étant solidaire de la tête d'application d'abrasif de telle manière que l'axe d'oscillation soit perpendiculaire à l'axe d'avance et de pression. L'ensemble comprend, de plus, des moyens d'entraînement pour animer l'un des éléments d'oscillation, de préférence le guide d'oscillation, d'un mouvement d'oscillation suivant son axe.The machining assembly comprises oscillation means of the application head, to animate the latter with an oscillation movement perpendicular to the direction of advance and pressure. Said oscillation means comprise, between the plunger rod of the feed and pressure ram and the abrasive application head, an oscillation guide and an oscillation rod mounted to move in axial translation in said guide of oscillation. oscillation being immobilized angularly in the latter, a first of these elements, preferably the oscillation rod, being integral with the piston rod of the advance and pressure ram and the second element, preferably the guide of oscillation, being integral with the abrasive application head such that the axis of oscillation is perpendicular to the axis of advance and pressure. The assembly further comprises driving means for animating one of the oscillation elements, preferably the oscillation guide, with oscillation movement along its axis.

De préférence, la tige de piston du vérin d'avance et de pression est creuse et traversée par un arbre d'entraînement agissant par un système à excentrique sur le guide d'oscillation pour animer ce dernier d'un mouvement d'oscillation.Preferably, the piston rod of the advance and pressure cylinder is hollow and traversed by a drive shaft acting by an eccentric system on the oscillation guide to animate the latter of an oscillation movement.

La tige de piston du vérin d'avance et de pression est avantageusement une tige carrée montée mobile en translation axiale dans un guide constitué par une douille de section carrée. La combinaison d'une telle tige et d'une telle douille, qui peut également être choisie avantageusement pour les deux éléments des moyens d'oscillation, assure automatiquement l'immobilisation angulaire de la tige par rapport à la douille, et inversement.The piston rod of the advance and pressure cylinder is advantageously a square rod mounted to move axially in a guide constituted by a socket of square section. The combination of such a rod and such a socket, which can also be chosen advantageously for the two elements of the oscillation means, automatically ensures the angular immobilization of the rod relative to the sleeve, and vice versa.

De préférence, la douille de section carrée peut être une douille à roulement, notamment une douille à billes. De telles douilles carrées à billes qui procurent un guidage de haute précision, une capacité de charge élevée et un faible frottement, sont bien connues et sont commercialisées, par exemple, par la société TECHNOMETAL sous la dénomination "DOUILLE A BILLES QUAD".Preferably, the square section bushing may be a rolling bushing, in particular a ball bushing. Such square ball bushings that provide high precision guidance, high load capacity and low friction, are well known and are marketed, for example, by the company TECHNOMETAL under the name "SOCKET BALLS QUAD".

Dans le cadre de l'invention, l'ensemble d'usinage peut être utilisé soit pour l'usinage par pierrage, avec un abrasif aggloméré fixé à la tête d'application, soit pour l'usinage par bande abrasive, auquel cas l'ensemble d'usinage est complété par un système de défilement d'une bande abrasive pendant l'usinage comprenant une bobine de dévidage de bande neuve, une bobine de renvidage de bande usée, et un système d'entraînement en rotation de la bobine de renvisage, la tête d'application d'abrasif comprenant un galet d'appui qui applique la bande abrasive contre la pièce à usiner. Dans ce cas, la bobine de dévidage est avantageusement montée sur la tête d'application d'abrasif de manière à participer au mouvement d'oscillation de cette tête. Cela élimine les problèmes que l'on rencontre, sur les ensembles d'usinage connus, au sujet du défilement correct de la bande abrasive sur le galet de pression, notamment dans le cas de mouvements d'oscillations d'amplitudes relativement importantes, du fait que la bobine de dévidage de bande abrasive est stationnaire et ne participe donc pas au mouvement d'oscillation du galet.In the context of the invention, the machining assembly can be used either for honing machining, with an agglomerated abrasive attached to the application head, or for abrasive belt machining, in which case machining assembly is completed by an abrasive belt scrolling system during machining comprising a new web rewinding reel, a used web rewinding reel, and a rotation spooling system of the rewinding spool , the abrasive application head comprising a bearing roller which applies the abrasive belt against the workpiece. In this case, the unwinding reel is advantageously mounted on the abrasive application head so as to participate in the oscillation movement of this head. This eliminates the problems that are encountered, on known machining assemblies, about the correct movement of the abrasive belt on the pressure roller, particularly in the case of oscillations movements of relatively large amplitudes, because that the abrasive belt reeling reel is stationary and therefore does not participate in the oscillation movement of the roller.

De préférence, aussi bien la bobine de dévidage que la bobine de renvidage de bande abrasive sont mobiles en translation dans le sens d'avance avec la tête d'application d'abrasif. Cela assure à la bande abrasive une tension toujours constante, indépendamment des mouvements d'avance (et de recul) de la tête d'application.Preferably, both the unwinding reel and the abrasive belt winding reel are movable in translation in the direction of advance with the abrasive application head. This ensures that the abrasive belt always has a constant tension, regardless of the forward (and backward) movements of the application head.

Pour réduire l'encombrement et le poids et faciliter le montage et le transport de l'ensemble d'usinage, il est avantageux, suivant l'invention, de diviser l'ensemble d'usinage par abrasif en deux modules, à savoir un module d'usinage qui regroupe la tête d'application d'abrasif, les moyens de guidage, d'avance et de pression de cette tête et, le cas échéant, les moyens de défilement de bande abrasive, et un module de motorisation et d'alimentation qui regroupe tous les moteurs d'entraînement et les moyens de commande et d'alimentation, les deux modules pouvant être couplés par des moyens de liaison flexibles déconnectables, à savoir des tuyaux flexibles pour l'alimentation du vérin d'avance et de poussée, un arbre flexible pour l'oscillation de la tête d'application d'abrasif et, le cas échéant, un arbre flexible pour le défilement de la bande abrasive. Cette dividion permet d'obtenir deux modules relativement légers, faciles à transporter, et le module d'usinage, du fait de l'absence de tout moyen de motorisation incorporé, peut être encore plus compact, donc plus facile à monter sur un support donné.To reduce the bulk and the weight and facilitate assembly and transport of the machining assembly, it is advantageous, according to the invention, to divide the abrasive machining assembly into two modules, namely a module machining unit which groups together the abrasive application head, the guide, advance and pressure means of this head and, where appropriate, the abrasive belt running means, and a motorization module and power supply which groups together all the drive motors and the control and power supply means, the two modules being able to be coupled by flexible disconnectable connection means, namely flexible hoses for feeding the advance and thrust ram, a flexible shaft for the oscillation of the abrasive application head and, where appropriate, a flexible shaft for the abrasive belt. This dividion makes it possible to obtain two relatively light modules that are easy to transport, and the machining module, because of the absence of any incorporated means of motorization, can be even more compact and therefore easier to mount on a given support. .

Du fait de cette compacité, il est possible de monter sous un faible encombrement, sur un même support plusieurs modules d'usinage juxtaposés, agissant successivement sur la même pièce avec des bandes abrasives de grains de finesse croissante, ces modules d'usinage pouvant, le cas échéant, être entraînés, commandés et alimentés par un module de motorisation et d'alimentation commun.Due to this compactness, it is possible to mount in a small space, on the same support several juxtaposed machining modules, acting successively on the same part with abrasive strips of grains of increasing fineness, these machining modules being able to if necessary, be driven, controlled and powered by a motor module and common power supply.

En référant aux dessins schématiques annexés, on va décrire ci-après plus en détail un mode de réalisation illustratif et non limitatif d'un ensemble d'usinage par abrasif conforme à l'invention.Referring to the attached schematic drawings, will be described below in more detail an illustrative embodiment and not limiting an abrasive machining assembly according to the invention.

Sur les dessins :

  • la figure 1 est une vue d'ensemble schématique des deux modules d'un ensemble d'usinage à bande abrasive ;
  • la figure 2 est une vue de dessus du module d'usinage, sans les bobines de bande abrasive ;
  • la figure 3 est une section longitudinale verticale schématique du module d'usinage à bande abrasive ;
  • la figure 4 est une section transversale schématique du module d'usinage, au niveau de la bobine de renvidage de bande abrasive ;
  • la figure 5 est une vue arrière du module d'usinage à bande abrasive ;
  • la figure 6 est une section transversale schématique du module d'usinage à bande abrasive, au niveau de la bobine de dévidage de bande abrasive.
On the drawings:
  • Figure 1 is a schematic overview of the two modules of an abrasive belt machining assembly;
  • Figure 2 is a top view of the machining module without the abrasive tape coils;
  • Figure 3 is a schematic vertical longitudinal section of the abrasive belt machining module;
  • Figure 4 is a schematic cross section of the machining module at the abrasive belt winding spool;
  • Fig. 5 is a rear view of the abrasive belt machining module;
  • Figure 6 is a schematic cross section of the abrasive belt machining module at the abrasive belt reel.

Selon la figure 1, un ensemble d'usinage par abrasif, en l'occurrence un ensemble de superfinition par bande abrasive à défilement continu, comprend un module d'usinage 1 et un module de motorisation, de commande et d'alimentation 2. Les deux modules 1 et 2 sont reliés entre eux par des moyens de liaison flexibles et déconnectables constitués par deux tuyaux flexibles 3, un premier arbre flexible 4 et un second arbre flexible 5. Le module 2 représenté sous la forme d'une valise 6 avec poignée de transport 7 renferme des moyens d'alimentation en fluide sous pression non représentés, un moteur électrique 8 ainsi qu'un moto-réducteur 9.According to FIG. 1, an abrasive machining assembly, in this case a continuously running abrasive belt superfinishing assembly, comprises a machining module 1 and a motorization, control and feeding module 2. two modules 1 and 2 are interconnected by flexible and disconnectable connecting means consisting of two flexible pipes 3, a first flexible shaft 4 and a second flexible shaft 5. The module 2 shown in the form of a bag 6 with a carrying handle 7 encloses pressurized fluid supply means (not shown), an electric motor 8 and a geared motor 9.

Tel que cela apparaît en particulier sur les figures 2 et 3, le module d'usinage 1 comprend un guide 10 en forme de douille carrée à billes servant de guide à une tige 11 de profil extérieur carré. Le cylindre 12 d'un vérin à fluide est raccordé à l'extrémité arrière du guide 10 ou d'une pièce intermédiaire 10a intercalée entre le cylindre 12 et le guide 10, la tige du piston 13 de ce vérin étant constituée par le prolongement vers l'arrière de la tige 11 montée dans le guide 10.As it appears in particular in FIGS. 2 and 3, the machining module 1 comprises a guide 10 in the form of a square ball socket serving as a guide for a rod 11 of square outer profile. The cylinder 12 of a fluid cylinder is connected to the rear end of the guide 10 or an intermediate piece 10a interposed between the cylinder 12 and the guide 10, the piston rod 13 of this jack being constituted by the extension towards the back of the rod 11 mounted in the guide 10.

La tige 11est creuse et est traversée par un arbre d'entraînement 14 qui entraîne, à l'extrémité avant de la tige 11, un système à excentrique 15. Le système à excentrique 15 imprime, sous l'effet de la rotation de l'arbre 14, un mouvement d'oscillation linéaire à un guide 16 constitué par une douille carrée à billes montée mobile en translation suivant un axe perpendiculaire à l'axe de la tige 11, sur une tige carrée 17 fixée par une chape 18 à l'extrémité avant de la tige 11. Le guide 16 porte, par l'intermédiaire d'une chape 19, un galet de pression 20 dont la fonction est d'appliquer contre une pièce à usiner non représentée, en particulier une pièce de révolution nentraînée en rotation autour de son axe, une bande abrasive 21 qui est retirée d'une bobine de dévidage 22 et passe sur le galet 20, sous le mouvement de renvidage imprimé à une bobine de renvidage 23 par un réducteur 24. Tel que cela apparaît en particulier sur les figures 3, 5 et 6, les deux bobines 22 et 23 sont montées, l'une à l'avant sur le guide 16 par l'intermédiaire d'un support 25 et l'autre à l'arrière sur la tige 11 par l'intermédiaire d'un support 26 de manière à participer toutes les deux aux mouvements de translation produits par le vérin 12, 13, la bobine 22 participant en outre au mouvement d'oscillation communiqué au galet de pression 20 par le système à excentrique 15.The rod 11 is hollow and is traversed by a drive shaft 14 which drives, at the front end of the rod 11, an eccentric system 15. The eccentric system 15 prints, under the effect of the rotation of the shaft 14, a linear oscillation movement to a guide 16 constituted by a square ball bushing mounted to move in translation along an axis perpendicular to the axis of the rod 11, on a square rod 17 fixed by a yoke 18 to the front end of the rod 11. The guide 16 carries, via a clevis 19, a pressure roller 20 whose function is to apply against a workpiece not shown, in particular a piece of revolution nentraînée in rotation about its axis, an abrasive belt 21 which is removed from a reeling reel 22 and passes on the roller 20, under the winding movement printed to a winding reel 23 by a gearbox 24. As it appears in particular in Figures 3, 5 and 6, the two coils 22 and 23 are mounted, one at the front on the guide 16 via a support 25 and the other at the rear on the rod 11 by means of a support 26 so as to participate both in the translation movements produced by the jack 12, 13, the coil 22 further participating in the oscillation movement communicated to the pressure roller 20 by the eccentric system 15.

La bobine de dévidage 22 comporte un système de freinage 27 (voir figure 6) grâce auquel la bande abrasive 21 reste toujours tendue entre la bobine de dévidage 22 et la bobine de renvidage 23.The unwinding reel 22 comprises a braking system 27 (see FIG. 6) by which the abrasive belt 21 always remains stretched between the unwinding reel 22 and the winding reel 23.

Les tuyaux flexibles 3 allant du module 2 au module 1 servent à l'alimentation en fluide du vérin 12, 13. L'arbre flexible 4 transmet le mouvement de rotation du moteur 8 à l'arbre 14, donc au système à excentrique 15. L'arbre flexible 5 transmet le mouvement de rotation du moto-réducteur 9 au réducteur 24 servant à l'entraînement de la bobine de renvidage 23.The flexible hoses 3 going from the module 2 to the module 1 serve to supply fluid to the jack 12, 13. The flexible shaft 4 transmits the rotational movement of the motor 8 to the shaft 14, thus to the eccentric system 15. The flexible shaft 5 transmits the rotational movement of the geared motor 9 to the gearbox 24 serving to drive the winding spool 23.

La fixation du module d'usinage 1 sur un support s'effectue, par exemple par des moyens de fixation 28 prévus latéralement sur le guide 10ou sur la pièce intermédiaire 10a, soit d'un côté, comme représenté en traits pleins épais sur les figures 2, 4 et 5, soit sur le côté opposé. De la même manière, le réducteur 24 pour l'entraînement de la bobine de renvidage 23 peut être disposé soit d'un côté, soit de l'autre de cette bobine, comme indiqué en traits pleins et en traits mixtes sur les figures 2 et 4.The fixing of the machining module 1 on a support is carried out, for example by fastening means 28 provided laterally on the guide 10 or on the intermediate piece 10a, or on one side, as shown in solid lines in the figures 2, 4 and 5, on the opposite side. In the same way, the gearbox 24 for driving the winding spool 23 may be arranged either on one side or the other of this spool, as shown in solid lines and in phantom in FIGS. 4.

Le module d'usinage 1 présente une architecture remarquable notamment par l'alignement de la tête d'application d'abrasif (galet de pression 20), des moyens de guidage (guide 10, tige 11) et des moyens d'avance et de poussée (vérin 12, 13), d'où une absence de porte-à-faux entre ces éléments et un porte-à-faux très réduit de la tête d'application d'abrasif (20) par rapport aux moyens de fixation 28.The machining module 1 has a remarkable architecture in particular by the alignment of the abrasive application head (pressure roller 20), guide means (guide 10, rod 11) and means of advance and of push (cylinder 12, 13), hence an absence of cantilever between these elements and a very small overhang of the abrasive application head (20) relative to the fastening means 28 .

Dans le cadre de l'invention, le vérin 12, 13 se section circulaire pourrait être remplacé par un ou deux vérins rectangulaires, de type connu en soi, intercalé(s) directement entre le guide 10 et le support 26 de la bobine 23, ces vérins rectangulaires s'adaptant mieux à la forme rectangulaire du guide 10.In the context of the invention, the cylinder 12, 13 is circular section could be replaced by one or two rectangular cylinders, of known type per se, interposed (s) directly between the guide 10 and the support 26 of the coil 23, these rectangular cylinders adapt better to the rectangular shape of the guide 10.

De plus, les liaisons par arbres flexibles 4, 5 entre les deux modules 1, 2 pourraient être supprimées et les moteurs d'entraînement être reportés sur le module 1, dans le cas où les problèmes d'encombrement et de poids du module 1 seraient considérés comme moins pénalisants.In addition, the flexible shaft connections 4, 5 between the two modules 1, 2 could be omitted and the drive motors can be transferred to the module 1, in the case where the congestion and weight problems of the module 1 would be considered less penalizing.

Claims (9)

  1. Unit for the abrasive machining of pieces, particularly for superfinishing, comprising a head for applying an abrasive (19, 20) to a workpiece, means for guiding (10, 11), advancing and pressing (12, 13) the application head on to the workpiece and means for fixing (28) the unit to a support, the guide means (10, 11) comprising an advance guide (10) and an advance and pressure rod (11) mounted so as to be movable by axial translation in the guide and carrying the abrasive application head (19, 20), the advance and pressure means (12, 13) comprising at least one fluid actuator (12, 13) aligned with the guide means (10, 11) and the abrasive application head (19, 20), the advance and pressure rod (11) being immobilized angularly with respect to the said guide (10), the guide carrying fixing means (28), characterized in that the unit additionally comprises oscillation means comprising, between the advance and pressure rod (11) and the abrasive application head (19, 20), an oscillation guide (16) and an oscillation rod (17) mounted in the said oscillation guide (16) while being movable by axial translation and immobilized angularly with respect to the said oscillation guide (16), a first of these elements being fixed to the advance and pressure rod (11) and the second element being fixed to the abrasive application head (19, 20) in such a way that the axis of oscillation is perpendicular to the axis of advance and pressure, and in that the unit comprises drive means (14, 15) to provide the second of the said elements with an oscillatory movement about its axis.
  2. Unit according to Claim 1, characterized in that the oscillation rod (17) is fixed to the advance and pressure rod (11) and in that the oscillation guide (16) is fixed to the abrasive application head (19, 20).
  3. Unit according to Claim 2, characterized in that the advance and pressure rod (11) is hollow and a drive shaft (14) passes through it, this shaft acting by means of an eccentric system on the oscillation guide (16) to provide the latter with an oscillatory movement.
  4. Unit according to any one of the preceding claims, characterized in that the rod (11, 17) is a square rod mounted so as to be movable by translation in a sleeve (10, 16) of square section, preferably a bearing sleeve, particularly a ball-bearing sleeve.
  5. Unit according to any one of the preceding claims, for abrasive band machining, with a system for advancing an abrasive band during machining, comprising a reel for unwinding fresh band, a reel for rewinding used band and a drive system for rotating the rewinding reel, the abrasive application head comprising a pressure roller which applies the abrasive band to the workpiece, characterized in that the unwinding reel (22) is mounted on the abrasive application head (19, 20) in such a way as to participate in the oscillatory movement of this head.
  6. Unit according to Claim 5, characterized in that the unwinding reel (22) and the rewinding reel (23) of the abrasive band (21) are mounted so as to be movable by translation in the direction of advance with the abrasive application head (19, 20).
  7. Unit according to any one of the preceding claims, characterized in that it is divided into a machining module (1) which comprises the abrasive application head (19, 20), the guide, advance and pressure means (10 to 14), the fixing means (28) and, if necessary, the abrasive band advance system (22, 23, 24), and a drive, power supply and control module (2) which comprises the drive motors (8, 9) and the control and power supply means, the two modules (1, 2) being connectable by flexible disconnectable linking means (3, 4, 5).
  8. Unit according to any one of Claims 4 to 7, characterized in that the guide, advance and pressure means comprise an actuator (12, 13) whose piston rod (13) consists of the extension of the advance and guide rod (11).
  9. Unit according to any one of Claims 4 to 7, characterized in that the guide, advance and pressure means comprise one or two rectangular actuators interposed between the advance guide (10) and a support (26) on the advance and pressure rod (11).
EP00400755A 1999-03-23 2000-03-17 Apparatus for machining workpieces by grinding, specially for superfinishing Expired - Lifetime EP1038633B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9903604A FR2791292B1 (en) 1999-03-23 1999-03-23 SET FOR MACHINING PARTS BY ABRASIVE, ESPECIALLY SUPERFINISHED
FR9903604 1999-03-23

Publications (2)

Publication Number Publication Date
EP1038633A1 EP1038633A1 (en) 2000-09-27
EP1038633B1 true EP1038633B1 (en) 2007-02-21

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Application Number Title Priority Date Filing Date
EP00400755A Expired - Lifetime EP1038633B1 (en) 1999-03-23 2000-03-17 Apparatus for machining workpieces by grinding, specially for superfinishing

Country Status (5)

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EP (1) EP1038633B1 (en)
AT (1) ATE354453T1 (en)
DE (1) DE60033459T2 (en)
ES (1) ES2278583T3 (en)
FR (1) FR2791292B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011012337B4 (en) * 2011-02-24 2013-01-24 Thielenhaus Technologies Gmbh Device for band finishing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911627A (en) * 1973-04-21 1975-10-14 Karl Heesemann Belt grinding machine adapted to grind a flat or curved surface

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59156507A (en) * 1983-02-25 1984-09-05 Ishikawajima Harima Heavy Ind Co Ltd Grinding device of rolling roll
FR2694902A1 (en) * 1992-08-18 1994-02-25 Grieshaber Masch Machine for surface finishing of workpieces

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911627A (en) * 1973-04-21 1975-10-14 Karl Heesemann Belt grinding machine adapted to grind a flat or curved surface

Also Published As

Publication number Publication date
FR2791292A1 (en) 2000-09-29
FR2791292B1 (en) 2001-04-27
DE60033459D1 (en) 2007-04-05
ES2278583T3 (en) 2007-08-16
DE60033459T2 (en) 2007-10-31
EP1038633A1 (en) 2000-09-27
ATE354453T1 (en) 2007-03-15

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