EP0031480A1 - Grinding device for the continuous reprofiling of a rail of a railway track - Google Patents

Grinding device for the continuous reprofiling of a rail of a railway track Download PDF

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Publication number
EP0031480A1
EP0031480A1 EP80107572A EP80107572A EP0031480A1 EP 0031480 A1 EP0031480 A1 EP 0031480A1 EP 80107572 A EP80107572 A EP 80107572A EP 80107572 A EP80107572 A EP 80107572A EP 0031480 A1 EP0031480 A1 EP 0031480A1
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EP
European Patent Office
Prior art keywords
rail
grinding wheel
grinding
reciprocating movement
chassis
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Granted
Application number
EP80107572A
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German (de)
French (fr)
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EP0031480B1 (en
Inventor
Romolo Panetti
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Speno International SA
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Speno International SA
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Priority to AT80107572T priority Critical patent/ATE5009T1/en
Publication of EP0031480A1 publication Critical patent/EP0031480A1/en
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Publication of EP0031480B1 publication Critical patent/EP0031480B1/en
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
    • E01B31/02—Working rail or other metal track components on the spot
    • E01B31/12—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails
    • E01B31/17—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by grinding

Definitions

  • the present invention relates to a grinding device for reprofiling on track and continuously on rail tracks.
  • This technique is no longer used because it has the disadvantage of leaving a sinusoidal trace on the rail resulting from the sinusoid described by the two edges of the grinding stone during its advance, and that of creating a discontinuity between the sections thus ground one after the other. These traces of grinding and this discontinuity between ground sections are no longer admissible with the current circulation speeds of convoys. Finally, as described in this patent, this grinding device does not make it possible to reconstitute the curvilinear profile of the rails because it only allows a plane grinding of the running surface of the rails.
  • the first solution consists in adding to the grinding device a device for periodic reshaping of the active surface of the grinding wheel by means of diamond tools.
  • This solution is advantageous in the case of the use of shaped grindstones whose active surface has a cross section conforming to the original curvature of a portion of the profile of the rail head, but it requires frequent checks of the work carried out to decide of the advisability of a reshaping operation, and the installation of such devices is costly.
  • the consumption of the wheel is important.
  • the second solution which avoids the deformation of the active surface of the grinding wheels and its consequences, consists in using flat lapidary grinding stones working on the face and no longer on the periphery; but the size of these lapidaries poses problems when the rail to be ground is surrounded by ob stacles such as for example level crossings and counter-rails.
  • the device according to the invention provides a solution making it possible to avoid the drawbacks mentioned. It allows the use of grinding wheels with active peripheral surface, of small size, at high cutting speed and with progressive attack allowing great depths of pass, without however requiring the addition of a reprofiling device, the movement of back and forth printed on the grinding wheel having the effect of regularly distributing its wear over the entire width of its active surface and without leaving any sinusoidal traces of grinding inherent in the combination of feed and back and forth movements comes from the grinding wheel.
  • the device shown in FIGS. 1 and 2 is suitable for the correction by grinding of burrs affecting the clearance of the head from a rail 1.
  • This device comprises a chassis 2 in the form of a bridge resting on the rail 1 by two pairs of rollers 3 with lateral flange 30. Each pair of rollers 3 is mounted on a double lifting beam 4 articulated to a foot 5 of said chassis.
  • a cylindrical grinding wheel 6 with rectilinear generators is driven in rotation by a motor 7 fixed to a mobile support 8.
  • This support 8 is journalled on an eccentric shaft 9 pivoted in two brackets 10 and 11 fixed to the longitudinal member 12 of the chassis 2.
  • a motor-reduction unit 13 for driving the eccentric shaft 9 is fixed on the console 11.
  • a double-acting hydraulic cylinder 14 is articulated by its cylinder on a console 15, fixed to the side member 12 of the chassis 2, and by the piston rod on a fitting 16 fixed to the motor 7 for driving the grinding wheel 6.
  • the chassis 2 is intended to be connected in the usual way to a railway vehicle having the function of moving it along a railway track to be ground. Means are provided for applying it vertically and laterally against a line of rails of the track with a determined pressure.
  • the cylindrical wheel 6 works by its periphery whose generatrices in contact with the rail 1 are oriented parallel to a tangent of the profile of the mushroom chosen as a function of the deformation to be corrected, here according to an oblique tangent to the part of the contour of the external leave or the burr is formed.
  • the movable support 8 on which the grinding wheel 6 and its drive motor 7 are fixed is journalled on the eccentric shaft 9 so that the resulting reciprocating movement is transverse to the rail 1.
  • the axis of rotation of the grinding wheel is perpendicular to the rail and the eccentric shaft 9 is parallel to the rail.
  • the hydraulic cylinder controls the grinding pressure and the rail 1 acts as a guide for the reciprocating movement of the grinding wheel 6.
  • the cylinder 14 is connected to a supply circuit, not shown, controlled by a value of preset pressure as a function of the desired depth of pass, itself a function of the amplitude of the deformation to be corrected.
  • An example of such a circuit includes a pressure control valve connected between the pressurized fluid supply pump and one of the two chambers of the hydraulic cylinder suspension for the grinding wheel , here the hydraulic cylinder 14.
  • the adjusting member of this valve is controlled for example by the operator by displaying a preset value according to the desired depth of pass.
  • the device described combines the advantages of permanent self-reshaping of the grinding wheel by the rail with those of peripheral grinding while avoiding the formation of grooves in the rail, which also makes it possible to save time and material.
  • the grinding wheel 6, seen according to arrow f in FIG. 2 is arranged obliquely with respect to the rail.
  • the back-and-forth movement represented by the arrow T, takes place either in the direction of the axis of rotation of the grinding wheel (FIG. 6), or obliquely with respect to said axis of rotation (FIG. 5).
  • the position of the motor 7 on the movable support 8 and the orientation in space of the eccentric shaft 9 obviously depend on the orientation given to the grinding wheel 6.
  • the motor 7 for driving the grinding wheel 6 can be independent of the mobile support 8 and / or the grinding wheel 6 and connected to the latter by a transmission.
  • the back and forth movement is obtained by a translation.
  • the grinding wheel 6 is mounted on a shaft 31 guided in a bearing 32 carried by an arm, not shown, articulated to the chassis 2.
  • the free end of the shaft 31 is provided with an annular shoulder 33 journalled in a clamp 34 of which it is thus axially integral.
  • This bush 34 is connected by a connecting rod 35 to the crank pin 51 of a crankshaft 36 driven in rotation by a motor-reduction unit 37.
  • the shaft 31 is driven in rotation, by means of a transmission by pulleys, 38, 39 and belt 40, using a motor 41 fixed on the bearing 32.
  • the crankpin 51 is fixed in a radial groove 52, of the crankshaft plate 36.
  • the eccentricity of the shaft 9 is modified to adjust the value of the amplitude a.
  • the grinding wheel 42 is frustoconical and the back and forth movement is directed in a direction close to those of the generators of contact of the frustoconical wheel with the rail.
  • the motor 43 of the grinding wheel 6 is mounted on a support 44 pivoting about a fixed axis 45 offset in a plane transverse to the line of rails 1 and secured to the chassis 2.
  • the opposite end of the support 44 is driven in a pendulum-type reciprocating movement by a rod-crank drive 46 along a path T l in an arc.
  • This trajectory T 1 is substantially transverse with respect to the file of rails 1 and has as its center the pivot axis 45 of the support 44.
  • the motor 47 of the grinding wheel 6 is pivotally mounted around a fixed axis 48 offset in a plane transverse to the line of rails 1 and carried by a console 49 secured to the chassis 2.
  • the motor 47 of the grinding wheel is driven around its pivot axis 48 in a reciprocating movement of the pendulum type by a connecting rod-crank drive 50 along a trajectory T 2 in an arc of a circle oriented substantially in the direction of the line of rails 1 and having as its center the pivot axis 48 of the motor 47
  • each group 53 and 54 the two grinding wheels 6 are mounted according to the principle of the variant shown in FIG. 9, that is to say pivoting around a deported shaft 52, but oriented at an angle relative to the line rails 1.
  • the motors of the two grinding wheels of each group are fixed on a common frame 55 mounted to pivot and slide within predetermined limits on one of the two shafts 52.
  • These two shafts 52 are rigidly fixed to the chassis 100 and each of the two frames 55 is connected to said chassis by a cylinder for adjusting the grinding depth, not shown, of the kind already described in the first embodiment shown in Figures 1 and 2.
  • Each frame 55 is connected by a connecting rod 56 to a drive mechanism in a common back-and-forth movement consisting of a crankshaft 58 actuated in rotation by a reduction motor group 59 fixed to the chassis 100.
  • This last variant makes it possible to increase the grinding capacity of the device and its use. high speed of travel along rail 1.
  • the adjustment of the cutting depth of the grinding wheel can be carried out directly and manually, without slaving to a preset displayed value.
  • the device will simply include, in place of the jack 14, a screw-nut connection controlled by a handwheel for example.
  • the set of mechanisms (8 to 13) actuating the grinding wheel 6 in its combined rotational and reciprocating movements will be connected to the chassis 2 by the intermediate of an adjustable frame in a transverse plan to the track.
  • several of these assemblies each comprising a grinding wheel may be mounted on the same chassis, each oriented in a different direction appropriate to the deformation to be corrected.
  • the whole of the movable assembly is mounted on the chassis by means of a movable support relative to the chassis 2 (not shown). to allow adjustment of the grinding depth of the grinding wheel and to compensate for its wear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

Device intended to be displaced along track rails and comprising a frame (2) guided by the rail (1) provided with a grinding wheel (6) which grinds through its periphery. To uniformly distribute the wear resulting from contact with the rail on all its active surface, the grinding wheel (6) is driven, in addition to the continuous rotation supplied by a driving motor (7), in an alternating motion transverse to the track by means of an actuating mechanism. This actuating mechanism comprises a motor-gear assembly (13) driving an eccentric shaft (9) on the eccentric of which the movable support (8) is hinged. To avoid the formation of sinusoidal traces due to the grinding, the amplitude a of the reciprocal movement is related by the equation a SIMILAR l-f to the width l of the active surface of the grinding wheel and to the width f of the portion of the profile of the rail which is ground.

Description

La présente invention a pour objet un dispositif de meulage pour le reprofilage en voie et en continu des rails de voie ferrée.The present invention relates to a grinding device for reprofiling on track and continuously on rail tracks.

Sous l'effet du passage des convois selon leur vitesse de circulation et selon l'inclinaison transversale de la voie, des déformations importantes apparaissent sur les rails, en plus de celles dues à leur usure ondulatoire, plus particulièrement dans les courbes, sur le rail intérieur. Sous l'effet du martelage des roues et de leur poussée axiale la table de roulement s'aplatit, devient même parfois concave alors qu'elle est à l'origine convexe, et le métal forme des bavures latérales affectant le congé et la face verticale du champignon du rail.Under the effect of the passage of the convoys according to their speed of movement and according to the transverse inclination of the track, significant deformations appear on the rails, in addition to those due to their wave wear, more particularly in the curves, on the rail. interior. Under the effect of the hammering of the wheels and their axial thrust the tread table flattens, sometimes even becomes concave when it is originally convex, and the metal forms lateral burrs affecting the leave and the vertical face of the rail head.

Ces déformations engendrent des accélérations transversales et des mouvements de lacets dont les effets nuisibles affectent aussi bien le matériel roulant que le rail lui-même qui ne subit plus les mêmes contraintes que celles pour lesquelles il a été conçu.These deformations generate transverse accelerations and yaw movements, the harmful effects of which affect both the rolling stock and the rail itself, which no longer experiences the same stresses as those for which it was designed.

Le meulage de ces déformations de type aléatoire a causé de tous temps des problèmes difficiles à résoudre inhérents aux divers modes d'entrai- nement et de positionnement des meules.The grinding of these random deformations has always caused difficult problems to solve inherent in the various modes of drive and positioning of the grinding wheels.

Lorsqu'une meule rotative travaillant par sa périphérie est déplacée parallèlement au rail, sa surface active, tout en atténuant la déformation, prend progressivement la forme de celle-ci en s'usant. Ainsi, par la suite elle tend à reproduire cette déformation sur un tronçon de rail qui ne la présentait pas. Par exemple sur une table de roulement très aplatie voire même concave d'un rail intérieur d'une courbe, une meule de forme s'aplatit et peut même aller jusqu'à se bomber progressivement. A la sortie de la courbe où le rail est moins déformé et a gardé au moins partiellement sa forme convexe d'origine, la meule aura tendance à l'aplatir, ce qui n'est pas le but recherché. De même pendant le meulage de fortes bavures, celles-ci vont creuser un sillon dans la meule qui va par la suite marquer le rail en laissant des empreintes correspondant aux deux bords de ce sillon.When a rotary grinding wheel working by its periphery is moved parallel to the rail, its active surface, while attenuating the deformation, gradually takes the shape of the latter as it wears out. Thus, thereafter it tends to reproduce this deformation on a section of rail which did not exhibit it. For example on a very flat tread or even even concave of an inner rail of a curve, a grinding wheel of form flattens and can even go so far as to bulge gradually. At the end of the curve where the rail is less deformed and has kept at least partially its original convex shape, the grinding wheel will tend to flatten it, which is not the aim. Similarly during the grinding of large burrs, these will dig a furrow in the grinding wheel which will subsequently mark the rail, leaving imprints corresponding to the two edges of this furrow.

La déformation de la surface active des meules causée par ces phénomènes rend ces dernières rapidement inutilisables et nécessite leur fréquent remplacement alors que le volume de leur matière abrasive est à peine entamé.The deformation of the active surface of the grindstones caused by these phenomena makes them quickly unusable and requires their frequent replacement while the volume of their abrasive material is barely started.

Une solution a été proposée et décrite en 1910 déjà dans le brevet suisse No. 52.659. Cette solution consistait à déplacer une meule cylindrique, plus étroite que la largeur de la surface à meuler, dans un mouvement alternatif de va-et-vient transversal au rail pendant son avance le long de ce dernier, de façon à assurer une usure uniforme de sa surface périphérique active. Dans ce dispositif l'avance de la meule est obtenue par une translation parallèle au rail d'un chariot porte-meule monté coulissant entre les deux essieux d'un lorry immobile par rapport au rail pendant le meulage. Lorsqu'un tronçon de rail est ainsi meulé, le meulage est arrêté, et le lorry est déplacé le long de la voie d'une valeur égale au déplacement parallèle du chariot porte-meule. Un nouveau tronçon de rail est alors meulé, le lorry étant maintenu immobile à nouveau. Cette technique n'est plus utilisée car elle présente l'inconvénient de laisser une trace sinusoïdale sur le rail résultant de la sinusoïde décrite par les deux bords de la meule pendant son avance, et celui de créer une discontinuité entre les tronçons ainsi meulés les uns à la suite des autres. Ces traces de meulage et cette discontinuité entre tronçons meulés ne sont plus admissibles avec les vitesses de circulation actuelles des convois. Enfin, tel que décrit dans ce brevet ce dispositif de meulage ne permet pas de reconstituer le profil curviligne des rails du fait qu'il ne permet qu'un meulage plan de la surface de roulement des rails.A solution was proposed and described in 1910 already in Swiss patent No. 52.659. This solution consisted in moving a cylindrical wheel, narrower than the width of the surface to be ground, in an reciprocating movement back and forth transverse to the rail during its advance along the latter, so as to ensure uniform wear of its active peripheral surface. In this device, the advance of the grinding wheel is obtained by a translation parallel to the rail of a grinding wheel carriage slidably mounted between the two axles of a stationary lorry relative to the rail during grinding. When a section of rail is thus ground, the grinding is stopped, and the lorry is moved along the track by a value equal to the parallel movement of the grinding wheel carriage. A new section of rail is then ground, the lorry being kept still again. This technique is no longer used because it has the disadvantage of leaving a sinusoidal trace on the rail resulting from the sinusoid described by the two edges of the grinding stone during its advance, and that of creating a discontinuity between the sections thus ground one after the other. These traces of grinding and this discontinuity between ground sections are no longer admissible with the current circulation speeds of convoys. Finally, as described in this patent, this grinding device does not make it possible to reconstitute the curvilinear profile of the rails because it only allows a plane grinding of the running surface of the rails.

Actuellement, le meulage des rails doit non seulement reprofiler les rails mais doit se faire de façon continue pour éviter les discontinuités et surtout pour permettre un travail de réfection de la voie suffisamment rapide pour tenir compte des impératifs d'exploitation des réseaux modernes.Currently, the grinding of the rails must not only reprofile the rails but must be done continuously to avoid discontinuities and above all to allow work to repair the track fast enough to take into account the operating requirements of modern networks.

Deux solutions récentes ont été apportées dans lesquelles la meule est déplacée parallèlement au rail par avance continue, sans combinaison avec un mouvement de va-et-vient transversal.Two recent solutions have been provided in which the grinding wheel is moved parallel to the rail by continuous advance, without combination with a transverse reciprocating movement.

La première solution consiste à adjoindre au dispositif de meulage un dispositif de reprofilage périodique de la surface active de la meule au moyen d'outils diamantés. Cette solution est intéressante dans le cas d'emploi de meules de forme dont la surface active présente une section droite épousant la courbure d'origine d'une portion du profil du champignon du rail, mais elle nécessite de fréquents contrôles du travail effectué pour décider de l'opportunité d'une opération de reprofilage, et l'installation de tels dispositifs est coûteuse. De plus, la consommation de la meule est importante.The first solution consists in adding to the grinding device a device for periodic reshaping of the active surface of the grinding wheel by means of diamond tools. This solution is advantageous in the case of the use of shaped grindstones whose active surface has a cross section conforming to the original curvature of a portion of the profile of the rail head, but it requires frequent checks of the work carried out to decide of the advisability of a reshaping operation, and the installation of such devices is costly. In addition, the consumption of the wheel is important.

La seconde solution, qui permet d'éviter la déformation de la surface active des meules et ses conséquences, consiste à employer des meules lapidaires plates travaillant sur face et non plus en périphérie ; mais l'encombrement de ces lapidaires pose des problèmes lorsque le rail à meuler se trouve entouré d'obstacles tels que par exemple les passages à niveau et les contre-rails.The second solution, which avoids the deformation of the active surface of the grinding wheels and its consequences, consists in using flat lapidary grinding stones working on the face and no longer on the periphery; but the size of these lapidaries poses problems when the rail to be ground is surrounded by ob stacles such as for example level crossings and counter-rails.

Le dispositif selon l'invention, tel que caractérisé dans la revendication 1, apporte une solution permettant d'éviter les inconvénients cités. Il permet en effet l'utilisation de meules à surface active périphérique, de faible encombrement, à vitesse de coupe élevée et à attaque progressive autorisant de grandes profondeurs de passe, sans toutefois nécessiter l'adjonction d'un dispositif de reprofilage, le mouvement de va-et-vient imprimé à la meule ayant pour effet de répartir régulièrement son usure sur toute la largeur de sa surface active et sans laisser de traces si- nusoidales de meulage inhérentes à la combinaison des mouvements d'avance et de va-et-vient de la meule. Ce dernier avantage est obtenu par le fait que l'amplitude a du mouvement de va-et-vient est sensiblement égale à la largeur de la meule diminuée de la largeur de la partie meulée du profil du champignon du rail qui fait que les bords de la meule ne traversent pas cette partie pendant le mouvement de va-et-vient.The device according to the invention, as characterized in claim 1, provides a solution making it possible to avoid the drawbacks mentioned. It allows the use of grinding wheels with active peripheral surface, of small size, at high cutting speed and with progressive attack allowing great depths of pass, without however requiring the addition of a reprofiling device, the movement of back and forth printed on the grinding wheel having the effect of regularly distributing its wear over the entire width of its active surface and without leaving any sinusoidal traces of grinding inherent in the combination of feed and back and forth movements comes from the grinding wheel. This last advantage is obtained by the fact that the amplitude a of the reciprocating movement is substantially equal to the width of the grinding wheel minus the width of the ground part of the profile of the rail head which makes the edges of the grinding wheel does not pass through this part during the back-and-forth movement.

Le dessin annexé représente, à titre d'exemple, une forme d'exécution de l'objet de l'invention, ainsi que sept variantes de détails constructifs.The accompanying drawing shows, by way of example, an embodiment of the subject of the invention, as well as seven variants of constructive details.

  • La figure 1 est une vue en élévation de la forme d'exécution principale.Figure 1 is an elevational view of the main embodiment.
  • La figure 2 est une coupe selon l'axe de coupe I-I de la figure 1.FIG. 2 is a section along the cutting axis I-I of FIG. 1.
  • Les figures 3 et 4 sont des schémas illustrant le principe de l'invention.Figures 3 and 4 are diagrams illustrating the principle of the invention.
  • Les figures 5 et 6 sont des vues, schématiques et partielles des deux premières variantes, selon la flèche f de la figure 2. ' Figures 5 and 6 are schematic and partial views of the first two variants, according to arrow f in Figure 2. '
  • Les figures 7 et 8 sont des vues de profils schématiques et partielles des troisième et quatrième variantes.Figures 7 and 8 are schematic and partial profile views of the third and fourth variants.
  • Les figures 9 et 10 sont des vues de dessus schématiques et partielles, des cinquième et sixième variantes.Figures 9 and 10 are schematic and partial top views of the fifth and sixth variants.
  • La figure 11 est une vue en plan schématique de la septième variante.Figure 11 is a schematic plan view of the seventh variant.

Le dispositif représenté aux figures 1 et 2 est adapté à la correction par meulage des bavures affectant le congé du champignon d'un rail 1.The device shown in FIGS. 1 and 2 is suitable for the correction by grinding of burrs affecting the clearance of the head from a rail 1.

Ce dispositif comprend un châssis 2 en forme de pont reposant sur le rail 1 par deux paires de galets 3 à boudin latéral 30. Chaque paire de galets 3 est montée sur un double palonnier 4 articulé à un pied 5 dudit châssis.This device comprises a chassis 2 in the form of a bridge resting on the rail 1 by two pairs of rollers 3 with lateral flange 30. Each pair of rollers 3 is mounted on a double lifting beam 4 articulated to a foot 5 of said chassis.

Une meule cylindrique 6 à génératrices rectilignes est entraînée en rotation par un moteur 7 fixé à un support mobile 8. Ce support 8 est tourillonné sur un arbre à excentrique 9 pivoté dans deux consoles 10 et 11 fixées au longeron 12 du châssis 2.A cylindrical grinding wheel 6 with rectilinear generators is driven in rotation by a motor 7 fixed to a mobile support 8. This support 8 is journalled on an eccentric shaft 9 pivoted in two brackets 10 and 11 fixed to the longitudinal member 12 of the chassis 2.

Un groupe moteur-réducteur 13 d'entraînement de l'arbre à excentrique 9 est fixé sur la console 11.A motor-reduction unit 13 for driving the eccentric shaft 9 is fixed on the console 11.

Un vérin hydraulique 14 à double effet est articulé par son cylindre sur une console 15, fixée au longeron 12 du châssis 2, et par la tige de son piston sur une ferrure 16 fixée au moteur 7 d'entraînement de la meule 6.A double-acting hydraulic cylinder 14 is articulated by its cylinder on a console 15, fixed to the side member 12 of the chassis 2, and by the piston rod on a fitting 16 fixed to the motor 7 for driving the grinding wheel 6.

Dans cette construction, le châssis 2 est destiné à être relié de manière habituelle à un véhicule ferroviaire ayant pour fonction de le déplacer le long d'une voie ferrée à meuler. Des moyens sont prévus pour l'appliquer verticalement et latéralement contre une file de rails de la voie avec une pression déterminée.In this construction, the chassis 2 is intended to be connected in the usual way to a railway vehicle having the function of moving it along a railway track to be ground. Means are provided for applying it vertically and laterally against a line of rails of the track with a determined pressure.

La meule cylindrique 6 travaille par sa périphérie dont les génératrices en contact avec le rail 1 sont orientées parallèlement à une tangente du profil du champignon choisie en fonction de la déformation à corriger, ici selon une tangente oblique à la partie du contour du congé extérieur ou se forme la bavure.The cylindrical wheel 6 works by its periphery whose generatrices in contact with the rail 1 are oriented parallel to a tangent of the profile of the mushroom chosen as a function of the deformation to be corrected, here according to an oblique tangent to the part of the contour of the external leave or the burr is formed.

Le support mobile 8 sur lequel sont fixés la meule 6 et son moteur d'entraînement 7 est tourillonné sur l'arbre à excentrique 9 de telle sorte que le mouvement de va-et-vient résultant soit transversal au rail 1. L'axe de rotation de la meule est perpendiculaire au rail et l'arbre à excentrique 9 est parallèle au rail.The movable support 8 on which the grinding wheel 6 and its drive motor 7 are fixed is journalled on the eccentric shaft 9 so that the resulting reciprocating movement is transverse to the rail 1. The axis of rotation of the grinding wheel is perpendicular to the rail and the eccentric shaft 9 is parallel to the rail.

Le vérin hydraulique commande la pression de meulage et le rail 1 joue le rôle de guide du mouvement de va-et-vient de la meule 6. Le vérin 14 est relié à un circuit d'alimentation, non représenté, asservi à une valeur de pression préétablie en fonction de la profondeur de passe désirée, elle même fonction de l'amplitude de la déformation à corriger.The hydraulic cylinder controls the grinding pressure and the rail 1 acts as a guide for the reciprocating movement of the grinding wheel 6. The cylinder 14 is connected to a supply circuit, not shown, controlled by a value of preset pressure as a function of the desired depth of pass, itself a function of the amplitude of the deformation to be corrected.

Un exemple de circuit de ce genre, décrit dans le brevet suisse No. 606.616, comprend une vanne de contrôle de pression branchée entre la pompe d'alimentation en fluide sous pression et l'une des deux chambres du vérin hydraulique de suspension de la meule, ici le vérin hydraulique 14. L'organe de réglage de cette vanne est commandé par exemple par l'opérateur par affichage d'une valeur préétablie en fonction de la profondeur de passe désirée.An example of such a circuit, described in Swiss Patent No. 606.616, includes a pressure control valve connected between the pressurized fluid supply pump and one of the two chambers of the hydraulic cylinder suspension for the grinding wheel , here the hydraulic cylinder 14. The adjusting member of this valve is controlled for example by the operator by displaying a preset value according to the desired depth of pass.

Pour éviter les traces sinusoïdales de meulage qui pourraient être formées par l'attaque des bords de la meule 6 pendant ses mouvements combinés d'avance et de va-et-vient, l'amplitude a du mouvement de va-et-vient est sensiblement égale à une valeur préétablie fonction à la fois de la largeur de la meule employée et de la largeur de la partie meulée du profil du champignon du rail, selon une relation a = 1-f illustrée par les figures 3 et 4.To avoid the sinusoidal traces of grinding which could be formed by the attack of the edges of the grinding wheel 6 during its combined movements of forward and back and forth, the amplitude a of the back and forth movement is substantially equal to a preset value which is a function of both the width of the grinding wheel used and the width of the ground part of the profile of the rail head, according to a relation a = 1-f illustrated by FIGS. 3 and 4.

Selon l'orientation À de la meule 6 autour du champignon du rail 1 et selon la profondeur de passe choisie en fonction de l'importance de la déformation à éliminer, une partie de largeur f plus ou moins importante du profil du champignon du rail 1 est meulée.Depending on the orientation A of the grinding wheel 6 around the head of the rail 1 and according to the depth of cut chosen according to the extent of the deformation to be eliminated, a part of width f more or less large in the profile of the head of the rail 1 is ground.

Ces valeurs étant connues pour chaque orientation a de la meule et la largeur 1 de cette dernière étant donnée, on voit (figures 3 et 4) qu'en appliquant la relation ci-dessus a ≅ 1-f les bords B1 et B2 de la meule 6 qui pourraient laisser une trace de meulage ne pénètrent pratiquement jamais dans la partie meulée de largeur f du profil du champignon du rail. On voit également qu'ainsi réglée, l'amplitude a du mouvement de va-et-vient de la meule assure le contact de toute la largeur 1 de la meule avec la partie meulée f. Il résulte de ces deux effets qu'on assure à la fois l'auto-reprofilage permanent de la surface active de la meule, par répartition uniforme de son usure, et l'évitement de la formation de traces sinusoïdales de meulage sur la largeur f de la partie meulée du champignon du rail.These values being known for each orientation a of the grinding wheel and the width 1 of the latter being given, it can be seen (FIGS. 3 and 4) that by applying the above relation to ≅ 1-f the edges B 1 and B 2 of the grinding wheel 6 which could leave a trace of grinding practically never penetrate into the ground portion of width f of the profile of the rail head. It can also be seen that thus adjusted, the amplitude a of the reciprocating movement of the grinding wheel ensures the contact of the entire width 1 of the grinding wheel with the ground part f. It results from these two effects that one ensures at the same time the permanent auto-reprofiling of the active surface of the grinding wheel, by uniform distribution of its wear, and the avoidance of the formation of sinusoidal traces of grinding on the width f of the ground part of the rail head.

Bien entendu, lorsque la meule 6 est en position oblique par rapport à la direction du rail, comme décrit plus loin dans des variantes, les valeurs a et f de la relation a = 1-f sont celles des projections de l'amplitude du mouvement de va-et-vient et de la largeur de la meule dans un plan perpendiculaire au rail.Of course, when the grinding wheel 6 is in an oblique position relative to the direction of the rail, as described below in variants, the values a and f of the relationship a = 1-f are those of the projections of the amplitude of the movement back and forth and the width of the grinding wheel in a plane perpendicular to the rail.

Le dispositif décrit combine les avantages de l'auto-reprofilage permanent de la meule par le rail à ceux du meulage périphérique tout en évitant la formation de sillons dans le rail ce qui permet en outre de réaliser des économies de temps et de matériel.The device described combines the advantages of permanent self-reshaping of the grinding wheel by the rail with those of peripheral grinding while avoiding the formation of grooves in the rail, which also makes it possible to save time and material.

De plus, en disposant plusieurs meules à des angles A différents sur un même châssis, il est possible de constituer un profil polygonal proche du profil curviligne d'origine du rail, de la même manière qu'avec les meules lapidaires utilisées sur champ.In addition, by placing several grinding wheels at different angles A on the same chassis, it is possible to form a polygonal profile close to the original curvilinear profile of the rail, in the same way as with the lapidary grinding stones used in the field.

Dans la variante illustrée aux figures 5 et 6, la meule 6, vue selon la flèche f de la figure 2, est disposée obliquement par rapport au rail. Dans ce cas, le mouvement de va-et-vient, figuré par la flèche T, s'effectue soit dans la direction de l'axe de rotation de la meule (figure 6), soit obliquement par rapport audit axe de rotation (figure 5). La position du moteur 7 sur le support mobile 8 et l'orientation dans l'espace de l'arbre excentrique 9 dépendent bien entendu de l'orientation donnée à la meule 6.In the variant illustrated in FIGS. 5 and 6, the grinding wheel 6, seen according to arrow f in FIG. 2, is arranged obliquely with respect to the rail. In this case, the back-and-forth movement, represented by the arrow T, takes place either in the direction of the axis of rotation of the grinding wheel (FIG. 6), or obliquely with respect to said axis of rotation (FIG. 5). The position of the motor 7 on the movable support 8 and the orientation in space of the eccentric shaft 9 obviously depend on the orientation given to the grinding wheel 6.

Le moteur 7 d'entraînement de la meule 6 peut être indépendant du support mobile 8 et/ou de la meule 6 et relié à celle-ci par une transmission.The motor 7 for driving the grinding wheel 6 can be independent of the mobile support 8 and / or the grinding wheel 6 and connected to the latter by a transmission.

Dans une troisième variante représentée à la figure 7, le mouvement de va-et-vient est obtenu par une translation. Dans ce but, la meule 6 est montée sur un arbre 31 guidé dans un palier 32 porté par un bras, non représenté, articulé au châssis 2. L'extrémité libre de l'arbre 31 est munie d'un épaulement annulaire 33 tourillonné dans une crapaudine 34 dont il est ainsi solidaire axialement. Cette crapaudine 34 est reliée par une bielle 35 au maneton 51 d'un vilebrequin 36 entraîné en rotation par un groupe moteur-réducteur 37. L'arbre 31 est entraîné en rotation, par l'intermédiaire d'une transmission par poulies, 38, 39 et courroie 40, à l'aide d'un moteur 41 fixé sur le palier 32. Dans cette troisième variante le maneton 51 est fixé dans une rainure radiale 52, du plateau du vilebrequin 36. La position du maneton 51 dans la rainure 52 est ajustable ce qui permet de régler l'amplitude a du mouvement de va-et-vient de la meule 6 afin de pouvoir ajuster si nécessaire cette valeur aux variations de la largeur f de la partie meulée du champignon du rail, selon la formule a = 1-f déjà expliquée. Cet ajustage se fait en modifiant l'écart radial entre le maneton 51 et l'axe de rotation du vilebrequin 36 par déplacement dudit maneton le long de la rainure 52.In a third variant shown in Figure 7, the back and forth movement is obtained by a translation. For this purpose, the grinding wheel 6 is mounted on a shaft 31 guided in a bearing 32 carried by an arm, not shown, articulated to the chassis 2. The free end of the shaft 31 is provided with an annular shoulder 33 journalled in a clamp 34 of which it is thus axially integral. This bush 34 is connected by a connecting rod 35 to the crank pin 51 of a crankshaft 36 driven in rotation by a motor-reduction unit 37. The shaft 31 is driven in rotation, by means of a transmission by pulleys, 38, 39 and belt 40, using a motor 41 fixed on the bearing 32. In this third variant, the crankpin 51 is fixed in a radial groove 52, of the crankshaft plate 36. The position of the crankpin 51 in the groove 52 is adjustable which adjusts the amplitude a of the back-and-forth movement of the grinding wheel 6 so that this value can be adjusted if necessary to variations in the width f of the ground portion of the rail head, according to the formula a = 1-f already explained. This adjustment is made by modifying the radial difference between the crank pin 51 and the axis of rotation of the crankshaft 36 by displacement of said crank pin along the groove 52.

Dans un mécanisme utilisant un excentrique, tel que celui montré dans le premier exemple de réalisation (figure 1 et figure 2), on modifie l'excentricité de l'arbre 9 pour ajuster la valeur de l'amplitude a.In a mechanism using an eccentric, such as that shown in the first exemplary embodiment (FIG. 1 and FIG. 2), the eccentricity of the shaft 9 is modified to adjust the value of the amplitude a.

Dans une variante représentée à la figure 8, la meule 42 est tronconique et le mouvement de va-et-vient est dirigé dans une direction proche de celles des génératrices de contact de la meule tronconique avec le rail.In a variant shown in Figure 8, the grinding wheel 42 is frustoconical and the back and forth movement is directed in a direction close to those of the generators of contact of the frustoconical wheel with the rail.

Dans une cinquième variante représentée à la figure 9, le moteur 43 de la meule 6 est monté sur un support 44 pivotant autour d'un axe fixe 45 déporté dans un plan transversal à la file de rails 1 et solidaire du châssis 2. L'extrémité opposée du support 44 est entraînée dans un mouvement alternatif de type pendulaire par un entraînement bielle-manivelle 46 suivant une trajectoire Tl en arc de cercle. Cette trajectoire T1 est sensiblement transversale par rapport à la file de rails 1 et a pour centre l'axe de pivotement 45 du support 44.In a fifth variant shown in Figure 9, the motor 43 of the grinding wheel 6 is mounted on a support 44 pivoting about a fixed axis 45 offset in a plane transverse to the line of rails 1 and secured to the chassis 2. The opposite end of the support 44 is driven in a pendulum-type reciprocating movement by a rod-crank drive 46 along a path T l in an arc. This trajectory T 1 is substantially transverse with respect to the file of rails 1 and has as its center the pivot axis 45 of the support 44.

Dans une sixième variante représentée à la figure 10, le moteur 47 de la meule 6 est monté pivotant autour d'un axe fixe 48 déporté dans un plan transversal à la file de rails 1 et porté par une console 49 solidaire du châssis 2. Le moteur 47 de la meule est entraîné autour de son axe de pivotement 48 dans un mouvement alternatif de type pendulaire par un entraînement bielle-manivelle 50 selon une trajectoire T2 en arc-de-cercle orientée sensiblement dans la direction de la file de rails 1 et ayant pour centre l'axe de pivotement 48 du moteur 47. Dans cette variante, les bras de levier des éléments mobiles sont déterminés de manière à ce que la projection A de la trajectoire T2 dans un plan perpendiculaire à la file de rails 1 soit, dans ce cas aussi égale à la valeur a définie par la relation a = 1-f.In a sixth variant shown in FIG. 10, the motor 47 of the grinding wheel 6 is pivotally mounted around a fixed axis 48 offset in a plane transverse to the line of rails 1 and carried by a console 49 secured to the chassis 2. The motor 47 of the grinding wheel is driven around its pivot axis 48 in a reciprocating movement of the pendulum type by a connecting rod-crank drive 50 along a trajectory T 2 in an arc of a circle oriented substantially in the direction of the line of rails 1 and having as its center the pivot axis 48 of the motor 47 In this variant, the lever arms of the movable elements are determined so that the projection A of the path T 2 in a plane perpendicular to the line of rails 1 is, in this case also equal to the value a defined by the relation a = 1-f.

Enfin, dans une dernière variante représentée à la figure 11 plusieurs meules 6, formant deux groupes 53 et 54 de deux meules chacun, sont montées sur un même châssis 100 représenté en traits mixtes fins pour ne pas surcharger le dessin.Finally, in a last variant shown in FIG. 11, several grinding wheels 6, forming two groups 53 and 54 of two grinding wheels each, are mounted on the same frame 100 shown in thin dashed lines so as not to overload the drawing.

Dans chaque groupe 53 et 54 les deux meules 6 sont montées selon le principe de la variante représentée à la figure 9, c'est-à-dire à pivotement autour d'un arbre déporté 52, mais orientées en biais par rapport à la file de rails 1.In each group 53 and 54 the two grinding wheels 6 are mounted according to the principle of the variant shown in FIG. 9, that is to say pivoting around a deported shaft 52, but oriented at an angle relative to the line rails 1.

Les moteurs des deux meules de chaque groupe sont fixés sur un bâti commun 55 monté pivotant et coulissant dans des limites prédéterminées sur l'un des deux arbres 52. Ces deux arbres 52 sont fixés rigidement au châssis 100 et chacun des deux bâtis 55 est relié audit châssis par un vérin de réglage de la profondeur de meulage, non représenté, du genre déjà décrit dans le premier exemple de réalisation représenté aux figures 1 et 2. Chaque bâti 55 est relié par une bielle 56 à un mécanisme d'entraînement dans un mouvement de va-et-vient commun constitué par un vilebrequin 58 actionné en rotation par un groupe moteur réducteur 59 fixé au châssis 100.The motors of the two grinding wheels of each group are fixed on a common frame 55 mounted to pivot and slide within predetermined limits on one of the two shafts 52. These two shafts 52 are rigidly fixed to the chassis 100 and each of the two frames 55 is connected to said chassis by a cylinder for adjusting the grinding depth, not shown, of the kind already described in the first embodiment shown in Figures 1 and 2. Each frame 55 is connected by a connecting rod 56 to a drive mechanism in a common back-and-forth movement consisting of a crankshaft 58 actuated in rotation by a reduction motor group 59 fixed to the chassis 100.

Cette dernière variante permet d'augmenter la capacité de meulage du dispositif et son utilisation à grande vitesse de déplacement le long du rail 1.This last variant makes it possible to increase the grinding capacity of the device and its use. high speed of travel along rail 1.

Dans une réalisation simple et économique, le réglage de la profondeur de passe de la meule peut être réalisé directement et manuellement, sans asservissement à une valeur affichée préétablie. Dans ce cas, le dispositif comportera simplement à la place du vérin 14 une liaison vis-écrou commandée par un volant de manoeuvre par exemple.In a simple and economical embodiment, the adjustment of the cutting depth of the grinding wheel can be carried out directly and manually, without slaving to a preset displayed value. In this case, the device will simply include, in place of the jack 14, a screw-nut connection controlled by a handwheel for example.

Dans une réalisation destinée à permettre la correction de plusieurs catégories de déformations réparties sur le champignon du rail, l'ensemble des mécanismes (8 à 13) actionnant la meule 6 dans ses mouvements combinés de rotation et alternatif sera relié au châssis 2 par l'intermédiaire d'un bâti orientable dans un plan tranversal à la voie. Dans le même but, plusieurs de ces ensembles comportant chacun une meule pourront être montés sur un même châssis, chacun orienté dans une direction différente appropriée à la déformation à corriger.In an embodiment intended to allow the correction of several categories of deformations distributed over the rail head, the set of mechanisms (8 to 13) actuating the grinding wheel 6 in its combined rotational and reciprocating movements will be connected to the chassis 2 by the intermediate of an adjustable frame in a transverse plan to the track. For the same purpose, several of these assemblies each comprising a grinding wheel may be mounted on the same chassis, each oriented in a different direction appropriate to the deformation to be corrected.

Bien entendu, dans le cas des variantes représentées schématiquement aux figures 9, 10 et 11 l'ensemble de l'équipage mobile est monté sur le chàs- sis par l'intermédiaire d'un support mobile par rapport au châssis 2 (non représenté) pour permettre l'ajustage de la profondeur de passe de la meule et compenser son usure.Of course, in the case of the variants shown diagrammatically in FIGS. 9, 10 and 11, the whole of the movable assembly is mounted on the chassis by means of a movable support relative to the chassis 2 (not shown). to allow adjustment of the grinding depth of the grinding wheel and to compensate for its wear.

Claims (9)

1. Dispositif de meulage pour le reprofilage en voie et en continu d'un rail d'une voie ferrée comportant au moins une unité de meulage comprenant au moins une meule entraînée en rotation par un moteur, ce dispositif étant monté sur un châssis porte- outil d'un véhicule ferroviaire, des moyens étant prévus pour déplacer le châssis en hauteur par rapport au véhicule et pour l'appliquer contre le rail avec une force déterminée, caractérisé par le fait qu'il comporte un mécanisme d'entraînement de la meule dans un mouvement alternatif suivant une direction formant un angle avec la file de rail, et par le fait que l'amplitude (a) du mouvement alternatif de la meule, projetée dans un plan perpendiculaire à l'axe longitudinal du rail passant par la zone de contact entre la meule et le rail, est sensiblement égale à la projection (1), dans ce même plan, de la largeur de la face de travail de la meule diminuée de la largeur (f) de la partie meulée du rail.1. Grinding device for reprofiling on track and continuously of a rail of a railway track comprising at least one grinding unit comprising at least one grinding wheel driven in rotation by a motor, this device being mounted on a chassis tool of a rail vehicle, means being provided for displacing the chassis in height with respect to the vehicle and for applying it against the rail with a determined force, characterized in that it comprises a drive mechanism for the grinding wheel in a reciprocating movement in a direction forming an angle with the rail file, and in that the amplitude (a) of the reciprocating movement of the grinding wheel, projected in a plane perpendicular to the longitudinal axis of the rail passing through the area of contact between the grinding wheel and the rail, is substantially equal to the projection (1), in this same plane, of the width of the working face of the grinding wheel reduced by the width (f) of the ground part of the rail. 2. Dispositif selon la revendication 1, caractérisé par le fait que le mécanisme d'entraînement de la meule dans un mouvement alternatif comporte un arbre à excentrique sur lequel est pivoté un support mobile portant l'unité de meulage.2. Device according to claim 1, characterized in that the drive mechanism of the grinding wheel in a reciprocating movement comprises an eccentric shaft on which is pivoted a movable support carrying the grinding unit. 3. Dispositif selon la revendication 1, caractérisé par le fait que le mouvement alternatif de la meule est rectiligne.3. Device according to claim 1, characterized in that the reciprocating movement of the grinding wheel is rectilinear. 4. Dispositif selon la revendication 1, caractérisé par le fait que le mouvement alternatif de la meule est curviligne.4. Device according to claim 1, characterized in that the reciprocating movement of the wheel is curvilinear. 5. Dispositif selon l'une des revendications précédentes, caractérisé par le fait qu'il comporte des moyens de réglage de l'amplitude du mouvement alternatif de la meule.5. Device according to one of the preceding claims, characterized in that it comprises means for adjusting the amplitude of the reciprocating movement of the grinding wheel. 6. Dispositif selon la revendication 1, caractérisé par le fait que la meule est tronconique.6. Device according to claim 1, characterized in that the grinding wheel is frustoconical. 7. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que la génératrice de la meule en contact avec le rail est oblique par rapport à l'axe longitudinal de ce rail.7. Device according to one of the preceding claims, characterized in that the generator of the grinding wheel in contact with the rail is oblique to the longitudinal axis of this rail. 8. Dispositif selon la revendication 1, caractérisé par le fait que le mouvement alternatif de la meule s'effectue suivant une direction oblique par rapport à son axe de rotation.8. Device according to claim 1, characterized in that the reciprocating movement of the grinding wheel takes place in an oblique direction relative to its axis of rotation. 9. Dispositif selon la revendication 1, caractérisé par le fait que le mécanisme d'entraînement du mouvement alternatif agit sur plusieurs unités de meulage portées par un même châssis.9. Device according to claim 1, characterized in that the reciprocating movement drive mechanism acts on several grinding units carried by the same chassis.
EP80107572A 1979-12-31 1980-12-04 Grinding device for the continuous reprofiling of a rail of a railway track Expired EP0031480B1 (en)

Priority Applications (1)

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AT80107572T ATE5009T1 (en) 1979-12-31 1980-12-04 GRINDING DEVICE FOR THE CONTINUOUS REPROFILING OF A RAIL OF A RAILWAY TRACK.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH11502/79 1979-12-31
CH1150279A CH625848A5 (en) 1979-12-31 1979-12-31

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EP0031480A1 true EP0031480A1 (en) 1981-07-08
EP0031480B1 EP0031480B1 (en) 1983-10-12

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EP (1) EP0031480B1 (en)
JP (1) JPS5697002A (en)
AT (1) ATE5009T1 (en)
AU (1) AU539562B2 (en)
CA (1) CA1161646A (en)
CH (1) CH625848A5 (en)
DE (1) DE3065324D1 (en)
ZA (1) ZA807797B (en)

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EP2400056A1 (en) * 2010-06-28 2011-12-28 Vossloh High Speed Grinding GmbH Device for processing bearing surfaces of rails using peripheral grinding with adjustable grinding profile
CN108291372A (en) * 2015-10-13 2018-07-17 韩国铁道技术研究院 Raceway surface grinding device and the raceway surface grinding method for using the device
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EP0044964B1 (en) * 1980-07-23 1984-02-15 Speno International S.A. Grinding machine for rectifying a rail of a railroad track
US4490947A (en) * 1981-12-07 1985-01-01 Franz Plasser Bahnbaumaschinen-Industriegesellschaft Mbh Mobile rail grinding machine
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EP2400056A1 (en) * 2010-06-28 2011-12-28 Vossloh High Speed Grinding GmbH Device for processing bearing surfaces of rails using peripheral grinding with adjustable grinding profile
CN108291372A (en) * 2015-10-13 2018-07-17 韩国铁道技术研究院 Raceway surface grinding device and the raceway surface grinding method for using the device
CN108589449A (en) * 2018-05-17 2018-09-28 中铁物轨道科技服务集团有限公司 A kind of personalization railway steel rail polishing target profile design method
CN108589449B (en) * 2018-05-17 2020-03-06 中铁物总运维科技有限公司 Personalized railway steel rail grinding target profile design method

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Publication number Publication date
DE3065324D1 (en) 1983-11-17
CA1161646A (en) 1984-02-07
ZA807797B (en) 1982-01-27
EP0031480B1 (en) 1983-10-12
CH625848A5 (en) 1981-10-15
JPS5697002A (en) 1981-08-05
AU539562B2 (en) 1984-10-04
US4416091A (en) 1983-11-22
AU6520080A (en) 1981-07-09
ATE5009T1 (en) 1983-10-15

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