EP0501183B1 - Device for reshaping railway rails - Google Patents

Device for reshaping railway rails Download PDF

Info

Publication number
EP0501183B1
EP0501183B1 EP92101786A EP92101786A EP0501183B1 EP 0501183 B1 EP0501183 B1 EP 0501183B1 EP 92101786 A EP92101786 A EP 92101786A EP 92101786 A EP92101786 A EP 92101786A EP 0501183 B1 EP0501183 B1 EP 0501183B1
Authority
EP
European Patent Office
Prior art keywords
rail
grinding
support
fact
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92101786A
Other languages
German (de)
French (fr)
Other versions
EP0501183A1 (en
Inventor
Romolo Panetti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Speno International SA
Original Assignee
Speno International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Speno International SA filed Critical Speno International SA
Publication of EP0501183A1 publication Critical patent/EP0501183A1/en
Application granted granted Critical
Publication of EP0501183B1 publication Critical patent/EP0501183B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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 the rectification and more particularly to the final polishing of the rails of a railroad track by grinding and / or reprofiling of the rails of a railroad track and in particular in the tight curves thereof.
  • GB-A-1,151,010 a device for the reprofiling of the mushroom of at least one rail comprising a support carrying at least one grinding unit, having at least one grinding wheel driven in rotation by a motor and means for axial displacement of this grinding wheel to apply it against a generator of the rail head and thus compensating for its wear.
  • a problem which arises for rail reprofiling machines is to be able, with the same wheel, to grind the internal leave, the rolling table and the external leave of the rail. This is especially essential when preparing rails for scaffolding. With existing machines, this can only be done with long manual adjustments and bulky grinding units, their axial stroke, parallel to the axis of rotation of the grinding wheel, must be large, finally these large axial strokes affect the precision of grinding.
  • Patent EP 0 145 919 describes a machine in which the grinding wheel (s) can pivot by a wide angle, of approximately 180 °, that is to say by a much greater angle than on previous machines, while avoiding that during its pivoting the grinding wheel does not conflict with obstacles it might encounter on the way, such as fishplates, lag screws, etc.
  • a change in the inclination of the grinding wheel is prevented from causing a significant correction of its axial position, parallel to its axis of rotation, to bring it back into contact with the rail.
  • the grinding units are mounted on carriages or chassis suspended under a railway vehicle and rest on one of the rails by guide rollers.
  • the grinding reference plane is defined by the running surface of the working rail and not by the plane of the track.
  • the plane of the tread table thereof is modified so that the reprofiling of the rail is carried out on the basis of an imprecise reference plane.
  • pivoting grinding units comprising a motor driving two rotating grinding wheels, the height of these units requires a large available space under the rail vehicle and it becomes difficult to accommodate trolleys under it. guide.
  • the reprofiling device described in patent CH 675,440 overcomes this drawback by mounting the grinding units on the chassis of a railway vehicle comprising a two-wheeled axle at one of its ends and articulated around an axis parallel to the longitudinal axis of the track at its other end on a rigid frame having two wheels. In this way the chassis is guided by the track and defines a reference plane parallel to the track plane.
  • All the above-mentioned devices use grinding wheels whose working face is flat and which therefore leave longitudinal facets after grinding on the rail head.
  • the use of lapidary grindstones creates grooves, transverse to the rail. These facets and these streaks during high power grinding can be significant and negatively influence the fatigue strength of the rail.
  • Grinding devices are also known as described in the patents DE-26 12 174 (cf. preamble to claim 1) and DE-26 12 173 in which the grinding units are pivotally mounted on a frame itself mounted so as to move vertically relative to a trolley rolling on the track.
  • This carriage is extendable laterally and comprises means tending to move it apart so that its flanged wheels are always applied against the inner flank of the rail to guide this carriage along the track.
  • This device comprises, unlike the previous one, grinding wheels of form reprofiling a relatively long length of the perimeter of the profile of the rail head and not only a straight facet of small width thereof.
  • the bearing force will be equal and opposite to that exerted on the outer rail, increased by the component of the weight of the corresponding carriage, therefore this bearing force is very high.
  • the rails are laid with an overlap of 15 to 35 mm depending on the networks and the rolling stock.
  • the axis of the grinding wheel is offset by a value equal to the deflection between the rollers of the carriage increased the gauge of the track. This significant offset from the axis of the grinding wheel results in a lowering of the lower angle of the grinding wheel which can go up to 50 mm and more for a grinding wheel inclined at 45 °. This is not acceptable because the grinding wheel interferes in particular with the fasteners of the rail leading to ruptures of grinding wheels.
  • the carriages extendable transversely must exert on the flanges of the wheels a very high spacing force to compensate for the cant components of the weight of the carriage in its entirety, as well as the weight of the grinding units and the grinding support forces. Due to this high spacing force, derailments of the carriages are frequent, particularly when the rails exhibit chamfering wear.
  • the object of the present invention is to produce a device for reprofiling the rails of a railroad track in which the guide of the grinding units with respect to the rail is very precise using simple means and which also eliminates any risk of derailment of the carriage.
  • the present invention naturally obviates all the aforementioned drawbacks and makes it possible to obtain perfect reprofiling.
  • the subject of the present invention is a device for grinding the surface of the head of at least one rail of a railway track comprising a rigid frame connected to the chassis of a railway vehicle, by lifting means for walking up and down. -foot of the vehicle; this frame being guided along the track; device comprising at least one grinding unit formed by an assembly of at least one grinding wheel, driven in rotation by a motor, each assembly constituting a grinding unit being mounted on a corresponding support in a linearly movable manner so as to bring the distance or distance wheel surface grinding wheel; and in which the axis of each grinding wheel is situated in a plane perpendicular to the longitudinal axis of the rail; characterized in that each support is mounted independently on the frame by means of translation allowing this support to move relative to the frame transversely to the rail; and by the fact that each support comprises at least one support roller and support means, connecting this support to the frame and tending to apply this support roller against one of the sides of the rail in the immediate vicinity of the corresponding grinding unit.
  • Figure 1 schematically illustrates the positioning of a shaped wheel relative to the rail.
  • Figure 2 schematically illustrates the positioning of two grinding wheels relative to the rail.
  • Figure 3 is an elevational view of a first embodiment of the device according to the invention.
  • FIG. 4 is a top view of the device illustrated in FIG. 3.
  • Figure 5 is an elevation of a second embodiment of the device.
  • Figure 6 is a variant of a guide roller of the device.
  • Figure 7 is an elevation of a third embodiment of the device.
  • FIG. 8 is a top view of the device illustrated in FIG. 7.
  • Figure 9 is an elevation of a fourth embodiment of the device.
  • FIG. 10 is a sectional view of the device illustrated in FIG. 9.
  • FIG. 11 is a top view of one of the devices illustrated in FIGS. 9 and 10.
  • Figure 12 is a side elevation of the device as illustrated in Figures 3 and 4 mounted under a rail vehicle.
  • Figures 13 and 14 illustrate a detail of a grinding unit provided with a grinding wheel grinding tool.
  • Figures 15 and 16 illustrate a variant of the reshaping device.
  • the licensee designed that it was necessary to make a pass for finishing or polishing the rail. with a special polishing unit, whose grinding wheel is a shaped grinding wheel, therefore in contact with a large and therefore curved portion of the surface of the rail head. It is also necessary that this shaped wheel has a constant off-center such that the normal to the radius connecting the axis of the wheel to each of its points of contact with the rail is parallel to the axis of the rail. In doing so, the facets and transverse ridges have been eliminated and by constant off-centering, i.e. precise positioning of the grinding wheel relative to the rail and no longer relative to the track, it is possible to avoid any deterioration of the shaped grinding wheel. and to ensure an unequaled precision in the reprofiling of the rail head.
  • Figure 1 schematically illustrates this concept.
  • the rail 1 with its cross section 1a defining the perimeter P of the mushroom 2 of the rail 1.
  • the grinding wheel of shape 3 whose active grinding face has a shape corresponding to that of the portion of the perimeter P to be polished .
  • This grinding wheel 3 is positioned relative to the rail 1 so as to be offset from the longitudinal plane of the rail, the axis 4 of the grinding wheel not intersecting the rail 1.
  • the axis 4 of the grinding wheel 3 is included in a plane T perpendicular to the longitudinal plane of rail 1 so that the contact line between the head 2 of the rail 1 and the grinding wheel 3 is included in this plane T perpendicular to the longitudinal axis of the rail 1. It is understood that to guarantee such positioning of the grinding wheel of form 3 relative to rail 1, very precise guiding of the grinding wheel is required relative to rail 1.
  • FIG. 2 shows the principle of this guidance by a roller 5 journalled on an axis 6 secured to the support 7 of the grinding wheel.
  • FIG. 2 also schematically illustrates the use of two grinding wheels of form 3.3a each machining a part (A-B; C-D) of the perimeter P of the head 2 of the rail 1, parts which moreover overlap over a certain length (C-B).
  • the wheels 3.3a are thus guided directly by the rail using the roller 5, this roller also being located in the immediate vicinity of the wheels in the longitudinal direction of the rail, the theoretical optimum being to accommodate this roller in the plane containing the axis of the grinding wheel.
  • All the embodiments of the device for polishing or finishing the reprofiling of the head of a rail of a railroad track illustrated comprise a frame 10 mechanically connected to the chassis of a rail vehicle by lifting means for walking up. -foot which are not illustrated in this embodiment.
  • This frame 10 can be either directly connected to the chassis of the rail vehicle, or connected to this vehicle by means of a trolley, intended to roll along the track, towed by the rail vehicle, trolley which is raised in its entirety. , therefore with the frame 10, by said lifting means.
  • means are provided for defining the low service position of the frame relative to the rail.
  • These means can be either rollers without a flange pivoted on the frame 10 and intended to roll on the surface of the rail or a lower end-of-travel stop limiting the vertical downward movement of the frame 10 relative to the vehicle chassis.
  • the polishing device is always connected to a railway vehicle either directly using lifting means or indirectly by being integral with a trolley rolling on the track, towed by the railway vehicle and which is also connected to it by means of lifting for the walk high-foot of the railway vehicle.
  • the rail vehicle is not illustrated, nor the possible trolley, only the frame 10 is shown, frame which as we saw above is guided along the railway track either by the railway vehicle of which it is a part or by the trolley rolling on the track of which it is integral.
  • the first embodiment illustrated in FIGS. 3 and 4 comprises at least one polishing unit, here two, each formed by a set of at least one lapidary wheel of shape 11 driven in rotation by a motor 12.
  • These polishing units 11,12 are mounted on a support 13 in a linearly displaceable manner in order to allow the grinding wheel 11 to be brought closer and further away from the surface of the rail 1 or of its head 2 whose surface is to be polished.
  • the active part A of the front surface of the lapidary wheel of form 11 has a shape corresponding exactly to that which it is desired to give to the part of the perimeter P of the head of the rail 1 with which it comes into contact.
  • the means making it possible to move the polishing unit 11, 12 linearly in the direction of the rail 1 are constituted by two double-acting cylinders, the cylinders 14 of which are integral with the engine 12 while the pistons (not shown) are integral with rods 15 rigidly fixed over the lengths of the support 13.
  • the support 13 is connected to the frame 10 by four connecting rods 16 articulated on the support 13 at one of their ends and on the frame 10 at their other end along axes extending parallel to the longitudinal axis of the support 13 and therefore substantially parallel to the longitudinal axis of the rail 1,2.
  • the assembly formed by the frame 10, the support 13 and the connecting rods 16 forms a deformable parallelogram allowing the support 13 to move in a transverse direction, ie perpendicular to the longitudinal axis of the rail.
  • This deformable parallelogram constitutes translation means allowing the support 13 to move relative to the frame 10 transversely relative to the rail, that is to say in a direction approximately perpendicular to the longitudinal axis of this rail 1,2 .
  • the support 13 comprises at least one support roller, here two support rollers 17, journalled idly on vertical axes, therefore perpendicular to the plane of the support. These support rollers are each associated with a polishing assembly 11, 12 and are located in the immediate vicinity of the axis of the corresponding grinding wheel 11.
  • these rollers 17 are intended to make contact against the internal flank of the head 2 of the rail 1 and therefore cannot always be situated in the same plane, perpendicular to the longitudinal axis of the rail, as the axis of rotation of the corresponding grinding wheel 11 which would be the optimal position to obtain the best guidance for this wheel. This could be achieved when the angle ⁇ is sufficient or else in an embodiment where the rollers 17 are intended to come into contact with the outer flank of the head 2 of the rail. However, such a solution is not always possible when there are obstacles outside the rail.
  • the support 13 is also connected to the frame 10 by two thrust jacks 18, the cylinder of which is articulated on uprights forming part of the frame 10 while the rod carrying the piston is articulated on the support 13.
  • These jacks 18 make it possible to maintain the rollers 17 applied against the side of the mushroom 2 of the rail 1 with a determined force.
  • the guiding of the support and therefore of the polishing units is carried out in an extremely precise manner, independently of the lateral oscillations of the vehicle or of the carriage and therefore of the frame 10. This guidance is also independent of the weight of any carriages and of the frame 10.
  • the support points of this guide are located in the immediate vicinity of the axis of the grinding wheels 11 so that the precision of the guide is effective both on the straight portions of the track and for curves or counter-curves thereof.
  • the distance separating the two support rollers 17 is very small compared to the radius of curvature of a curve of the railway track so that even in curve the position of the grinding wheels 11 relative to the rail 1,2 is always ensured with precision (some tenth of mm).
  • this precise guiding device it is possible to use lapidary shaped grinding wheels for polishing the rails and therefore to remove the grinding facets with a finishing pass, also to remove the transverse ridges by the position of the grinding wheels.
  • the axis of rotation of which is contained in a plane perpendicular to the longitudinal axis of the rail and to avoid any damage to the grinding wheels thanks to the precise guidance of the latter directly relative to the rail independently of the transverse movements of the vehicle or of the carriage. bearing and with reduced force, not dependent on the weight of the possible carriage and of the frame 10.
  • a second support 13 can be provided for carrying polishing units cooperating with the other rail of the track. This second support is then mounted in the same way as that described above on the frame 10, symmetrically with respect to the longitudinal axis of the track, ie to the longitudinal axis of this frame 10.
  • FIG. 5 illustrates a variant of the polishing unit in which the assembly or assemblies formed by a motor 12 and a lapidary wheel of shape 11 have an axis always included in a plane perpendicular to the longitudinal axis of the support 13, therefore rail 1.2, but inclined at an angle ⁇ (see Figure 1) relative to a vertical direction, perpendicular to the plane of the track.
  • Such an arrangement of the motor 12 - grinding wheel 11 assembly is particularly advantageous for the polishing of the entire running surface of the rail or even of a part of the external leave of the rail.
  • FIG. 6 shows a different embodiment of the support roller pivoted on the support 13.
  • the roller has the shape of a beveled disc 19 secured to an axis 20 pivoted on the support 13 by the intermediate ball bearings 21.
  • This arrangement of the support roller (s) is particularly advantageous because it makes it possible to obtain a reduced bulk on the inside of the rail.
  • the polishing device comprises a frame and two polishing units mounted on a support which, due to its connection to the frame in the form of a deformable parallelogram, undergoes a slight variation in height, ie a displacement in the vertical direction, when moved transversely to the rail. These variations in height are small and can easily be compensated for by the stroke of the jacks 14.
  • the frame 10 is provided with carrier blades 22 extending downwards, the lower end of which is provided with two calibrated holes.
  • the frame is provided with two carrying blades 22 at least arranged on either side of the support.
  • the support 13 is provided for a polishing unit comprising a single assembly grinding wheel 11 - motor 12 always mounted on this support by means of jacks 14.
  • This support 13 has here the general shape of a square frame provided with two spacers on which the rods of the jacks 14 are fixed. This support 13 also has two support rollers 17 intended to come into contact with the internal flank of the head 2 of the rail.
  • the frame 13 is provided with two rods or slides 23, respectively 24 on each of its lateral sides extending perpendicular to the longitudinal axis of the rail and sliding without play in the calibrated holes of the carrier blades 22.
  • the support 13 is movable transversely to the rail relative to the frame 10 in a straight line.
  • the ends of the two rods 24 are joined by a plate 25 on which the rod of the jack 18 is articulated which makes it possible to apply the rollers 17 against the internal flank of the head 2 of the rail.
  • the polishing device comprises a support 13 like that described with reference to FIGS. 3 and 4 connected to the frame 10 by connecting rods 16 and jacks 18 and having support rollers 17 coming into contact with the internal side of the head 2 of the rail.
  • the polishing unit comprises two grinding wheel 11 - motor 12 assemblies rigidly connected by lower yokes 27.
  • the carriage 13 also has upper yokes 26 integral with the yokes 27 of this support.
  • This polishing unit is provided with guide rollers 28 cooperating with guides 29 of the support 13 allowing a movement of the polishing unit in the direction of the rail relative to the support 13.
  • This movement of the grinding wheels in the direction of the rail is controlled by a central jack whose piston is integral with an upper rod 31 whose end is mounted sliding between the upper yokes 26 while the lower rod 32 of this central jack is articulated on the lower yokes 27.
  • Locking devices 33, 34 make it possible to immobilize the upper end of the rod 31 relative to the yokes 26. In operation, blocking devices 33, 34 are released, thus, when the two assemblies of the polishing unit are moved simultaneously towards the rail by the central jack 30 the bearing forces of the two grinding wheels 11 against the rail are balanced automatically.
  • the two grinding wheels 11 could be rotated from a single motor 12 by means of an adequate kinematic link, gear, belt, etc.
  • Figures 11 and 12 illustrate an embodiment in which the frame 10 of the polishing device is mounted directly on a rail vehicle V via the lifting means, here constituted by a double-acting cylinder whose cylinder 40 is secured to the vehicle V while the rod 41 carrying its piston is secured to the frame 10.
  • the lifting means here constituted by a double-acting cylinder whose cylinder 40 is secured to the vehicle V while the rod 41 carrying its piston is secured to the frame 10.
  • This frame 10 is therefore movable vertically relative to the vehicle V and is guided in its movements by the guides 42 integral with the vehicle V sliding in passages of the frame 10 provided for this purpose.
  • the stroke of the frame 10 relative to the vehicle V is limited both upwards and downwards, the frame 10 coming into contact with parts of the vehicle V constituting high 43 or low 44 end-of-travel stops respectively.
  • each frame 10 carries two supports 13 per rail file and each support 13 carries a polishing unit comprising two grinding wheel 11 - motor 12 assemblies. These supports 13 and their polishing units are as described with reference to FIGS. 9 and 10.
  • the support 13 can be provided with a tool for rectifying the shape of the grinding wheel 11.
  • FIG. 13 schematically illustrates such a tool for grinding the grinding wheel 11.
  • a double-acting cylinder 45 whose rod 46, actuated by the piston, is provided with a stop 48 and carries at its end a grinding tool 47, rotary or not, whose edge 49 corresponds to the shape desired of the active part A of the front face of the lapidary grinding wheel 11.
  • FIG. 14 illustrates a variant of this grinding wheel grinding tool in which the tool 47 is rigidly fixed to the support 13. In this case, to grind the grinding wheel it is advanced, when it is not in work , towards the tool 47 by the jacks 14 in advance of the polishing unit.
  • polishing device described can be envisaged, in particular it is possible by varying the inclination of the axis of the grinding wheel 11 - motor 12 assemblies, always situated in a plane perpendicular to the longitudinal axis of the rail, to polish all the parts of the head 2 of the rail, ie the running surface and the two leaves, internal and external.
  • one roller per grinding wheel is required, placed if possible in the plane perpendicular to the rail and containing the axis of the grinding wheel.
  • the size of the parts generally does not allow such an embodiment in practice.
  • the construction carried out comprises one roller per grinding wheel, located as close as possible to said plane.
  • a single roller for two wheels can also be conceivable, this roller is then located between the two wheels of a set with two polishing units.
  • the advance of the support cylinders must then be synchronized to ensure a displacement of the support 13 parallel to the axis of the frame 10.
  • the device is more particularly intended for fine grinding or polishing of the rail to remove any streaks and facets. This is why in these described devices, grinding wheels are used whose axis does not intersect the longitudinal axis of the rail.
  • FIGS. 15 and 16 illustrate such an application of the device according to the invention, similar to the device illustrated in FIGS. 3 and 4 but using a lapidary wheel with a flat front face for each reprofiling unit and in which the grinding units are also movable around an axis parallel to the longitudinal axis of the rail.
  • This lapidary wheel 51 has a flat working front face and is therefore capable of supporting heavy loads and therefore of performing, if necessary, intensive grinding of the fungus 2 of the rail 1.
  • the two grinding units 50, 51 are mounted on a cradle 52 by means of jacks 53 making it possible to move these units linearly relative to the cradle 52 parallel to the axis of the motor 50 and therefore perpendicular to the longitudinal axis of the rail.
  • the cradle 52 is formed of side members 52a and end plates 52b, plates 52b which are pivoted on the spurs 54 secured to a support 55.
  • Double-acting cylinders 56 connect the cradle 52 to the support 55 and make it possible to adjust and to position the cradle 52 angularly with respect to the support 55 and thus to determine the longitudinal zone of the head of the rail 2 on which the grinding wheel 51 will work.
  • the support 55 is connected as in the other embodiments to the frame 10 by connecting rods 16 and a jack 18 allows the rollers 17 of the support 55 to be applied against the internal blank of the rail.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Railway Tracks (AREA)
  • Platform Screen Doors And Railroad Systems (AREA)
  • Ticket-Dispensing Machines (AREA)
  • Linear Motors (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

It comprises a rigid frame (10), connected to the chassis of a railway vehicle by lifting means for the light running of the vehicle and at least one polishing unit (11, 12). Each polishing unit (11, 12) is installed on a support (13) in such a way that it may be displaced linearly in order to move the wheel (11) towards or away from the surface of the rail (1, 2) to be polished. The axis of the wheel (11) is located in a plane perpendicular to the longitudinal axis of the rail (1, 2) but does not intersect the latter, so that the line of contact between the wheel (11) and the surface of the rail (1, 2) is contained within a plane perpendicular to the longitudinal axis of the rail. The support (13) is installed on the frame (10) with translation means (16) enabling it to be displaced transversely in relation to the frame (10). The support (13) comprises at least one bearing roller (17) and bearing means (18), connecting this support (13) to the frame (10) and tending to press this bearing roller (17) against one of the flanks of the rail (1, 2) in the immediate vicinity of the polishing unit (11, 12). <IMAGE>

Description

La présente invention se rapporte à la rectification et plus particulièrement au polissage final des rails d'une voie ferrée par meulage et/ou reprofilage des rails d'une voie ferrée et notamment dans les courbes serrées de celle-ci.The present invention relates to the rectification and more particularly to the final polishing of the rails of a railroad track by grinding and / or reprofiling of the rails of a railroad track and in particular in the tight curves thereof.

On utilise actuellement pour le profilage des rails des machines comportant des unités de meulage commandées, telles que décrites dans les brevets CH 606.616 ou CH 633.336, qui présentent notamment l'inconvénient de nécessiter, lors de chaque réglage angulaire de l'inclinaison de la meule, un repositionnement de la meule contre le rail à meuler. De plus, l'amplitude angulaire du pivotement des unités de meulage est limitée.Currently used for the profiling of the rails machines comprising controlled grinding units, as described in patents CH 606,616 or CH 633,336, which in particular have the disadvantage of requiring, during each angular adjustment of the inclination of the grinding wheel , repositioning the wheel against the rail to be ground. In addition, the angular amplitude of the pivoting of the grinding units is limited.

Il est en outre connu du brevet GB-A-1.151.010 un dispositif pour le reprofilage du champignon d'au moins un rail comportant un support portant au moins une unité de meulage, présentant au moins une meule entraînée en rotation par un moteur et des moyens de déplacement axial de cette meule pour l'appliquer contre une génératrice du champignon du rail et compensant ainsi son usure.It is also known from GB-A-1,151,010 a device for the reprofiling of the mushroom of at least one rail comprising a support carrying at least one grinding unit, having at least one grinding wheel driven in rotation by a motor and means for axial displacement of this grinding wheel to apply it against a generator of the rail head and thus compensating for its wear.

Un problème qui se pose pour les machines de reprofilage des rails est de pouvoir, avec la même meule, meuler le congé intérieur, la table de roulement et le congé extérieur du rail. Ceci est notamment indispensable lorsqu'on prépare des rails pour le barraudage. Avec les machines existantes, ceci ne peut se faire qu'avec des réglages manuels longs et des unités de meulage encombrantes, leur course axiale, parallèle à l'axe de rotation de la meule, devant être grande, enfin ces grandes courses axiales nuisent à la précision du meulage.A problem which arises for rail reprofiling machines is to be able, with the same wheel, to grind the internal leave, the rolling table and the external leave of the rail. This is especially essential when preparing rails for scaffolding. With existing machines, this can only be done with long manual adjustments and bulky grinding units, their axial stroke, parallel to the axis of rotation of the grinding wheel, must be large, finally these large axial strokes affect the precision of grinding.

Le brevet EP 0 145 919 décrit une machine dont la ou les meules peuvent pivoter d'un grand angle, d'environ 180°, soit d'un angle beaucoup plus grand que sur les machines antérieures, tout en évitant qu'au cours de son pivotement la meule n'entre en conflit avec les obstacles qu'elle pourrait rencontrer en voie, tels les éclisses, tire-fonds, etc. De plus, pour assurer une bonne qualité du meulage on évite qu'un changement d'inclinaison de la meule n'entraîne une correction importante de sa position axiale, parallèle à son axe de rotation, pour la ramener en contact avec le rail.Patent EP 0 145 919 describes a machine in which the grinding wheel (s) can pivot by a wide angle, of approximately 180 °, that is to say by a much greater angle than on previous machines, while avoiding that during its pivoting the grinding wheel does not conflict with obstacles it might encounter on the way, such as fishplates, lag screws, etc. In addition, to ensure good quality of grinding, a change in the inclination of the grinding wheel is prevented from causing a significant correction of its axial position, parallel to its axis of rotation, to bring it back into contact with the rail.

Dans toutes ces réalisations les unités de meulage sont montées sur des chariots ou châssis suspendus sous un véhicule ferroviaire et reposent sur un des rails par des galets de guidage. De ce fait le plan de référence de meulage est défini par la surface de roulement du rail en travail et non pas par le plan de la voie. Lorsque le rail est fortement usé, le plan de la table de roulement de celui-ci est modifié de sorte que le reprofilage du rail s'effectue sur la base d'un plan de référence imprécis. D'autre part, vu l'utilisation d'unités de meulage pivotantes comportant un moteur entraînant deux meules en rotation, la hauteur de ces unités nécessite un espace disponible important sous le véhicule ferroviaire et il devient difficile de loger sous celui-ci des chariots de guidage.In all these embodiments, the grinding units are mounted on carriages or chassis suspended under a railway vehicle and rest on one of the rails by guide rollers. Thereby the grinding reference plane is defined by the running surface of the working rail and not by the plane of the track. When the rail is heavily worn, the plane of the tread table thereof is modified so that the reprofiling of the rail is carried out on the basis of an imprecise reference plane. On the other hand, given the use of pivoting grinding units comprising a motor driving two rotating grinding wheels, the height of these units requires a large available space under the rail vehicle and it becomes difficult to accommodate trolleys under it. guide.

Le dispositif de reprofilage décrit dans le brevet CH 675.440 permet de remédier à cet inconvénient en montant les unités de meulage sur le châssis d'un véhicule ferroviaire comportant un essieu à deux roues à l'une de ses extrémités et articulé autour d'un axe parallèle à l'axe longitudinal de la voie à son autre extrémité sur un cadre rigide présentant deux roues. De cette façon le chassis est guidé par la voie et définit un plan de référence parallèle au plan de la voie.The reprofiling device described in patent CH 675,440 overcomes this drawback by mounting the grinding units on the chassis of a railway vehicle comprising a two-wheeled axle at one of its ends and articulated around an axis parallel to the longitudinal axis of the track at its other end on a rigid frame having two wheels. In this way the chassis is guided by the track and defines a reference plane parallel to the track plane.

Tous les dispositifs précédents cités utilisent des meules dont la face de travail est plane et qui de ce fait laissent après meulage des facettes longitudinales sur le champignon du rail. De plus, l'utilisation de meules lapidaires engendre des stries, transversales au rail. Ces facettes et ces stries lors de meulage à grande puissance, peuvent être importantes et influencer négativement la résistance à la fatigue du rail.All the above-mentioned devices use grinding wheels whose working face is flat and which therefore leave longitudinal facets after grinding on the rail head. In addition, the use of lapidary grindstones creates grooves, transverse to the rail. These facets and these streaks during high power grinding can be significant and negatively influence the fatigue strength of the rail.

On connaît encore des dispositifs de meulage tels que décrits dans les brevets DE-26 12 174 (cf. préambule de la revendication 1) et DE-26 12 173 dans lesquels les unités de meulage sont montées pivotantes sur un cadre lui-même monté de manière à se déplacer verticalement par rapport à un chariot roulant sur la voie. Ce chariot est extensible latéralement et comporte des moyens tendant à l'écarter pour que ses roues à boudin soient toujours appliquées contre le flanc intérieur du rail pour guider ce chariot le long de la voie. Ce dispositif comporte, contrairement au précédent, des meules de forme reprofilant une relativement grande longueur du périmètre du profil du champignon du rail et non pas seulement une facette rectiligne de faible largeur de celui-ci. Par contre, ces dispositifs ne sont pas satisfaisants car, notamment en courbe, la longueur du chariot étant grande, puisqu'il est destiné à porter plusieurs unités de meulage, le guidage des meules par rapport au rail n'est pas suffisamment précis pouvant provoquer soit la rupture de la meule soit un reprofilage inadéquat et très imprécis du rail.Grinding devices are also known as described in the patents DE-26 12 174 (cf. preamble to claim 1) and DE-26 12 173 in which the grinding units are pivotally mounted on a frame itself mounted so as to move vertically relative to a trolley rolling on the track. This carriage is extendable laterally and comprises means tending to move it apart so that its flanged wheels are always applied against the inner flank of the rail to guide this carriage along the track. This device comprises, unlike the previous one, grinding wheels of form reprofiling a relatively long length of the perimeter of the profile of the rail head and not only a straight facet of small width thereof. By against, these devices are not satisfactory because, in particular in curve, the length of the carriage being large, since it is intended to carry several grinding units, the guidance of the grinding wheels relative to the rail is not sufficiently precise which can cause either the rupture of the grinding wheel is an inadequate and very imprecise reprofiling of the rail.

De plus, dans les courbes en dévers la force d'appui des galets contre le rail extérieur doit être suffisante pour équilibrer la force de réaction des meules d'une part et la composante du poids propre du chariot d'autre part.In addition, in inclined curves the bearing force of the rollers against the outer rail must be sufficient to balance the reaction force of the grinding wheels on the one hand and the component of the self-weight of the carriage on the other.

Pour le rail intérieur, la force d'appui sera égale et opposée à celle s'exerçant sur le rail extérieur, augmentée de la composante du poids du chariot correspondant, de ce fait cette force d'appui est très élevée.For the inner rail, the bearing force will be equal and opposite to that exerted on the outer rail, increased by the component of the weight of the corresponding carriage, therefore this bearing force is very high.

Dans une courbe, du fait de la longueur relativement grande entre les roues du chariot (2 m. ou plus), la flèche entre la ligne de contact des roues et le point d'appui de la meule la plus centrée est importante (environ 5mm pour un rayon de courbure de 100 m), et pour le rail intérieur de la courbe, c'est cette meule qui doit supporter toute la force d'appui sus-mentionnée, il s'ensuit généralement une rupture de la ou des meules.In a curve, because of the relatively large length between the wheels of the carriage (2 m. Or more), the deflection between the line of contact of the wheels and the fulcrum of the most centered wheel is large (about 5mm for a radius of curvature of 100 m), and for the inner rail of the curve, it is this grinding wheel which must withstand all of the abovementioned bearing force, there generally follows a rupture of the grinding wheel (s).

Dans les courbes serrées, de rayon de 100 à 250 m, les rails sont posés avec un surécartement de 15 à 35 mm suivant les réseaux et le matériel roulant.In tight bends, with a radius of 100 to 250 m, the rails are laid with an overlap of 15 to 35 mm depending on the networks and the rolling stock.

Lors du meulage des rails dans ces courbes par des unités de meulage portées par des chariots guidés par les rails, l'axe de la meule est déporté d'une valeur égale a la flèche entre les galets de roulement du chariot augmentée du surécartement de la voie. Ce décalage important de l'axe de la meule provoque un abaissement de l'angle inférieur de la meule qui peut aller jusqu'à 50 mm et plus pour une meule inclinée à 45°. Ceci n'est pas acceptable car la meule interfère notamment avec les attaches du rail conduisant à des ruptures de meules.When grinding the rails in these curves by grinding units carried by carriages guided by the rails, the axis of the grinding wheel is offset by a value equal to the deflection between the rollers of the carriage increased the gauge of the track. This significant offset from the axis of the grinding wheel results in a lowering of the lower angle of the grinding wheel which can go up to 50 mm and more for a grinding wheel inclined at 45 °. This is not acceptable because the grinding wheel interferes in particular with the fasteners of the rail leading to ruptures of grinding wheels.

Le dispositif décrit dans le brevet DE-26 12 174 qui est relativement simple permet de compenser le surécartement de la voie en courbe serrée mais non pas la flèche du chariot qui est suffisant pour conduire comme on l'a vu précédemment à des ruptures de meule.The device described in patent DE-26 12 174 which is relatively simple makes it possible to compensate for the oversteering of the track in a tight curve but not the deflection of the carriage which is sufficient to lead, as we have seen previously, to breaks in the grinding wheel .

On a encore proposé dans le document EP-A-0344390 un chariot présentant un galet de roulement intermédiaire aux unités de meulages pour en faire varier l'orientation et donc la position par rapport au rail. A noter que le dispositif décrit n'est utilisable qu'avec des meules périphériques entraînant d'autres inconvénients.There has also been proposed in document EP-A-0344390 a carriage having a rolling roller intermediate to the grinding units to vary the orientation and therefore the position relative to the rail. Note that the device described can only be used with peripheral grinding wheels, causing other drawbacks.

De plus dans les dispositifs décrits dans les deux documents DE-26 12 174 et EP-A-0344 390 les chariots extensibles transversalement doivent exercer sur les boudins des roues une force d'écartement très élevée pour compenser en dévers les composantes du poids du chariot dans sa totalité, ainsi que du poids des unités de meulage et des force d'appui de meulage. Du fait de cette force d'écartement élevée, les déraillements des chariots sont fréquents, particulièrement lorsque les rails présentent une usure de chamfreinage.In addition, in the devices described in the two documents DE-26 12 174 and EP-A-0344 390, the carriages extendable transversely must exert on the flanges of the wheels a very high spacing force to compensate for the cant components of the weight of the carriage in its entirety, as well as the weight of the grinding units and the grinding support forces. Due to this high spacing force, derailments of the carriages are frequent, particularly when the rails exhibit chamfering wear.

La présente invention a pour but la réalisation d un dispositif de reprofilage des rails d'une voie ferrée dans lequel le guidage des unités de meulage par rapport au rail est très précis à l'aide de moyens simples et qui de plus supprime tout risque de déraillement du chariot. La présente invention obvie bien entendu à tous les inconvénients précités et permet l'obtention d un reprofilage parfait.The object of the present invention is to produce a device for reprofiling the rails of a railroad track in which the guide of the grinding units with respect to the rail is very precise using simple means and which also eliminates any risk of derailment of the carriage. The present invention naturally obviates all the aforementioned drawbacks and makes it possible to obtain perfect reprofiling.

La présente invention a pour objet un dispositif de meulage de la surface du champignon d'au moins un rail d'une voie ferrée comportant un cadre rigide relié au châssis d'un véhicule ferroviaire, par des moyens de relevage pour la marche haut-le-pied du véhicule; ce cadre étant guidé le long de la voie; dispositif comportant au moins une unité de meulage formée par un ensemble d'au moins une meule, entrainée en rotation par un moteur, chaque ensemble constituant une unité de meulage étant monté sur un support correspondant de façon déplaçable linéairement de manière à rapprocher ou éloigner la meule de la surface du rail; et dans lequel l'axe de chaque meule est situé dans un plan perpendiculaire à l'axe longitudinal du rail; caractérisé par le fait que chaque support est monté indépendamment sur le cadre par des moyens de translation permettant à ce support de se déplacer par rapport au cadre transversalement par rapport au rail; et par le fait que chaque support comporte au moins un galet d'appui et des moyens d'appui, reliant ce support au cadre et tendant à appliquer ce galet d'appui contre l'un des flancs du rail au voisinage immédiat de l'unité de meulage correspondante.The subject of the present invention is a device for grinding the surface of the head of at least one rail of a railway track comprising a rigid frame connected to the chassis of a railway vehicle, by lifting means for walking up and down. -foot of the vehicle; this frame being guided along the track; device comprising at least one grinding unit formed by an assembly of at least one grinding wheel, driven in rotation by a motor, each assembly constituting a grinding unit being mounted on a corresponding support in a linearly movable manner so as to bring the distance or distance wheel surface grinding wheel; and in which the axis of each grinding wheel is situated in a plane perpendicular to the longitudinal axis of the rail; characterized in that each support is mounted independently on the frame by means of translation allowing this support to move relative to the frame transversely to the rail; and by the fact that each support comprises at least one support roller and support means, connecting this support to the frame and tending to apply this support roller against one of the sides of the rail in the immediate vicinity of the corresponding grinding unit.

Le dessin annexé illustre schématiquement et à titre d'exemple plusieurs formes d'exécution du dispositif de meulage des rails selon l'invention.The accompanying drawing illustrates schematically and by way of example several embodiments of the device for rail grinding according to the invention.

La figure 1 illustre schématiquement le positionnement d'une meule de forme par rapport au rail.Figure 1 schematically illustrates the positioning of a shaped wheel relative to the rail.

La figure 2 illustre schématiquement le positionnement de deux meules de forme par rapport au rail.Figure 2 schematically illustrates the positioning of two grinding wheels relative to the rail.

La figure 3 est une vue en élévation d'une première forme d'exécution du dispositif selon l'invention.Figure 3 is an elevational view of a first embodiment of the device according to the invention.

La figure 4 est une vue de dessus du dispositif illustré à la figure 3.FIG. 4 is a top view of the device illustrated in FIG. 3.

La figure 5 est une élévation d'une seconde forme d'exécution du dispositif.Figure 5 is an elevation of a second embodiment of the device.

La figure 6 est une variante d'un galet de guidage du dispositif.Figure 6 is a variant of a guide roller of the device.

la figure 7 est une élévation d'une troisième forme d'exécution du dispositif.Figure 7 is an elevation of a third embodiment of the device.

La figure 8 est une vue de dessus du dispositif illustré à la figure 7.FIG. 8 is a top view of the device illustrated in FIG. 7.

La figure 9 est une élévation d'une quatrième forme d'exécution du dispositif.Figure 9 is an elevation of a fourth embodiment of the device.

La figure 10 est une vue en coupe du dispositif illustré à la figure 9.FIG. 10 is a sectional view of the device illustrated in FIG. 9.

La figure 11 est une vue de dessus d'un des dispositifs illustrés aux figures 9 et 10.FIG. 11 is a top view of one of the devices illustrated in FIGS. 9 and 10.

La figure 12 est une élévation de côté du dispositif tel qu'illustré aux figures 3 et 4 montés sous un véhicule ferroviaire.Figure 12 is a side elevation of the device as illustrated in Figures 3 and 4 mounted under a rail vehicle.

Les figures 13 et 14 illustrent un détail d'une unité de meulage munie d'un outil de rectifiage de la meule de forme.Figures 13 and 14 illustrate a detail of a grinding unit provided with a grinding wheel grinding tool.

Les figures 15 et 16 illustrent un variante du dispositif de reprofilage.Figures 15 and 16 illustrate a variant of the reshaping device.

Pour permettre de résoudre les problèmes de guidage des meules posés ci-avant et à la fois éliminer les facettes du rail reprofilé et supprimer les stries transversales du rail, la titulaire a conçu qu'il fallait réaliser une passe de finition ou de polissage du rail avec une unité spéciale, de polissage, dont la meule est une meule de forme, donc en contact avec une portion importante et donc incurvée de la surface du champignon du rail. Il faut également que cette meule de forme présente un décentrage constant tel que la normale au rayon reliant l'axe de la meule à chacun de ses points de contact avec le rail soit parallèle à l'axe du rail. Ce faisant on a éliminé les facettes et les stries transversales et par le décentrage constant, soit un positionnement précis de la meule par rapport au rail et non plus par rapport à la voie, il est possible d'éviter toute détérioration de la meule de forme et d'assurer une précision encore inégalée du reprofilage du champignon d'un rail.In order to solve the problems of guiding the grinding wheels posed above and at the same time eliminating the facets of the reprofiled rail and eliminating the transverse grooves of the rail, the licensee designed that it was necessary to make a pass for finishing or polishing the rail. with a special polishing unit, whose grinding wheel is a shaped grinding wheel, therefore in contact with a large and therefore curved portion of the surface of the rail head. It is also necessary that this shaped wheel has a constant off-center such that the normal to the radius connecting the axis of the wheel to each of its points of contact with the rail is parallel to the axis of the rail. In doing so, the facets and transverse ridges have been eliminated and by constant off-centering, i.e. precise positioning of the grinding wheel relative to the rail and no longer relative to the track, it is possible to avoid any deterioration of the shaped grinding wheel. and to ensure an unequaled precision in the reprofiling of the rail head.

La figure 1 illustre schématiquement ce concept. On voit le rail 1 avec sa section droite 1a définissant le périmètre P du champignon 2 du rail 1. On voit également la meule de forme 3, dont la face active de meulage présente une forme correspondant à celle de la portion du périmètre P à polir. Cette meule 3 est positionnée par rapport au rail 1 de manière à être décentrée par rapport au plan longitudinal du rail, l'axe 4 de la meule n'intersectant pas le rail 1. L'axe 4 de la meule 3 est compris dans un plan T perpendiculaire au plan longitudinal du rail 1 de sorte que la ligne de contact entre le champignon 2 du rail 1 et la meule 3 est comprise dans ce plan T perpendiculaire à l'axe longitudinal du rail 1. On conçoit que pour garantir un tel positionnement de la meule de forme 3 par rapport au rail 1, il faille un guidage très précis de la meule par rapport au rail 1.Figure 1 schematically illustrates this concept. We see the rail 1 with its cross section 1a defining the perimeter P of the mushroom 2 of the rail 1. We also see the grinding wheel of shape 3, whose active grinding face has a shape corresponding to that of the portion of the perimeter P to be polished . This grinding wheel 3 is positioned relative to the rail 1 so as to be offset from the longitudinal plane of the rail, the axis 4 of the grinding wheel not intersecting the rail 1. The axis 4 of the grinding wheel 3 is included in a plane T perpendicular to the longitudinal plane of rail 1 so that the contact line between the head 2 of the rail 1 and the grinding wheel 3 is included in this plane T perpendicular to the longitudinal axis of the rail 1. It is understood that to guarantee such positioning of the grinding wheel of form 3 relative to rail 1, very precise guiding of the grinding wheel is required relative to rail 1.

Contrairement à tous les dispositifs de meulage existants où les meules sont guidées par un chariot ou véhicule roulant sur la voie, il faut ici pour obtenir le guidage précis requis, guider la meule ou son support directement sur le rail à usiner, de préférence par son flanc interne puisque c'est celui qui est le moins déformé par l'usure du rail et où il n'existe pas d'obstacle proche du rail.Unlike all existing grinding devices where the grinding wheels are guided by a carriage or vehicle rolling on the track, it is necessary here to obtain the precise guidance required, guide the grinding wheel or its support directly on the rail to be machined, preferably by its internal side since it is the one which is the least deformed by the wear of the rail and where there is no obstacle close to the rail.

La figure 2 montre le principe de ce guidage par un galet 5 tourillonné sur un axe 6 solidaire du support 7 de la meule. La figure 2 illustre aussi schématiquement l'utilisation de deux meules de forme 3,3a usinant chacune une partie (A-B; C-D) du périmètre P du champignon 2 du rail 1, parties se recoupant d'ailleurs sur une certaine longueur (C-B). Les meules 3,3a sont ainsi guidées directement par le rail à l'aide du galet 5, ce galet étant d'ailleurs situé à proximité immédiate des meules dans le sens longitudinal du rail, l'optimum théorique étant de loger ce galet dans le plan contenant l'axe de la meule.Figure 2 shows the principle of this guidance by a roller 5 journalled on an axis 6 secured to the support 7 of the grinding wheel. FIG. 2 also schematically illustrates the use of two grinding wheels of form 3.3a each machining a part (A-B; C-D) of the perimeter P of the head 2 of the rail 1, parts which moreover overlap over a certain length (C-B). The wheels 3.3a are thus guided directly by the rail using the roller 5, this roller also being located in the immediate vicinity of the wheels in the longitudinal direction of the rail, the theoretical optimum being to accommodate this roller in the plane containing the axis of the grinding wheel.

On remarque que lorsque deux meules se chevauchant sont utilisées, la forme de ces meules est telle qu'aux points A et C du périmètre elles ne soient plus en contact avec le rail pour éviter toute striure longitudinale de celui-ci. Aux points A1 et C1 ces meules sont tangentes au profil P du champignon du rail. Au point B du périmètre une éventuelle strie longitudinale formée par l'extrémité de la meule 3 est automatiquement enlevée par l'autre meule 3a qui est tangente au profil du rail 1 au point B.It is noted that when two overlapping grinding stones are used, the shape of these grinding stones is such that at points A and C of the perimeter they are no longer in contact with the rail to avoid any longitudinal streaking thereof. At points A1 and C1 these wheels are tangent to the profile P of the rail head. At point B of the perimeter a possible longitudinal groove formed by the end of the grinding wheel 3 is automatically removed by the other grinding wheel 3a which is tangent to the profile of the rail 1 at point B.

Toutes les formes d'exécution du dispositif de polissage ou de finissage du reprofilage du champignon d un rail d'une voie ferrée illustrées comportent un cadre 10 relié mécaniquement au châssis d'un véhicule ferroviaire par des moyens de relevage pour la marche haut-le-pied qui ne sont pas illustrés dans cette forme d'exécution.All the embodiments of the device for polishing or finishing the reprofiling of the head of a rail of a railroad track illustrated comprise a frame 10 mechanically connected to the chassis of a rail vehicle by lifting means for walking up. -foot which are not illustrated in this embodiment.

Ce cadre 10 peut être soit directement relié au châssis du véhicule ferroviaire, soit relié à ce véhicule par l'intermédiaire d'un chariot, destiné à rouler le long de la voie, tracté par le véhicule ferroviaire, chariot qui est relevé dans sa totalité, donc avec le cadre 10, par lesdits moyens de relevage.This frame 10 can be either directly connected to the chassis of the rail vehicle, or connected to this vehicle by means of a trolley, intended to roll along the track, towed by the rail vehicle, trolley which is raised in its entirety. , therefore with the frame 10, by said lifting means.

Dans le cas où ce cadre est directement relié au véhicule ferroviaire, donc sans chariot intermédiaire, des moyens sont prévus pour définir la position basse de service du cadre par rapport au rail. Ces moyens peuvent être soit des galets sans boudin pivotés sur le cadre 10 et destinés à rouler sur la surface du rail soit une butée de fin de course inférieure limitant le déplacement vertical vers le bas du cadre 10 par rapport au châssis du véhicule.In the case where this frame is directly connected to the rail vehicle, therefore without an intermediate carriage, means are provided for defining the low service position of the frame relative to the rail. These means can be either rollers without a flange pivoted on the frame 10 and intended to roll on the surface of the rail or a lower end-of-travel stop limiting the vertical downward movement of the frame 10 relative to the vehicle chassis.

Ainsi le dispositif de polissage est toujours relié à un véhicule ferroviaire soit directement à l'aide de moyens de relevage soit indirectement en étant solidaire d'un chariot roulant sur la voie, tracté par le véhicule ferroviaire et qui lui est également relié par des moyens de relevage pour la marche haut-le-pied du véhicule ferroviaire.Thus the polishing device is always connected to a railway vehicle either directly using lifting means or indirectly by being integral with a trolley rolling on the track, towed by the railway vehicle and which is also connected to it by means of lifting for the walk high-foot of the railway vehicle.

Dans la plupart des formes d'exécution du dispositif selon l'invention qui vont être décrites dans ce qui suit à titre d'exemples le véhicule ferroviaire n'est pas illustré, ni l'éventuel chariot, seul le cadre 10 est représenté, cadre qui comme on l'a vu plus haut est guidé le long de la voie ferrée soit par le véhicule ferroviaire dont il fait partie soit par le chariot roulant sur la voie dont il est solidaire.In most embodiments of the device according to the invention which will be described in the following by way of examples, the rail vehicle is not illustrated, nor the possible trolley, only the frame 10 is shown, frame which as we saw above is guided along the railway track either by the railway vehicle of which it is a part or by the trolley rolling on the track of which it is integral.

Un tel guidage, on l'a vu dans l'introduction n'est pas suffisamment précis pour assurer la qualité du reprofilage du rail actuellement exigée, problème auquel la présente invention permet de répondre de façon satisfaisante.As we have seen in the introduction, such guidance is not sufficiently precise to ensure the quality of the reprofiling of the rail currently required, a problem to which the present invention makes it possible to respond satisfactorily.

La première forme d'exécution illustrée aux figures 3 et 4 comporte au moins une unité de polissage, ici deux, formées chacune par un ensemble d'au moins une meule lapidaire de forme 11 entraînée en rotation par un moteur 12. Ces unités de polissage 11,12 sont montées sur un support 13 de manière déplaçable linéairement pour permettre de rapprocher et d'éloigner la meule 11 de la surface du rail 1 ou de son champignon 2 dont la surface est à polir.The first embodiment illustrated in FIGS. 3 and 4 comprises at least one polishing unit, here two, each formed by a set of at least one lapidary wheel of shape 11 driven in rotation by a motor 12. These polishing units 11,12 are mounted on a support 13 in a linearly displaceable manner in order to allow the grinding wheel 11 to be brought closer and further away from the surface of the rail 1 or of its head 2 whose surface is to be polished.

La partie active A de la surface frontale de la meule lapidaire de forme 11 présente une forme correspondant exactement à celle que l'on désire donner à la partie du périmètre P du champignon du rail 1 avec laquelle elle entre en contact.The active part A of the front surface of the lapidary wheel of form 11 has a shape corresponding exactly to that which it is desired to give to the part of the perimeter P of the head of the rail 1 with which it comes into contact.

Dans cet exemple les moyens permettant de déplacer linéairement l'unité de polissage 11,12 en direction du rail 1 sont constitués par deux vérins à double effet dont les cylindres 14 sont solidaires du moteur 12 tandis que les pistons (non illustrés) sont solidaires de tiges 15 rigidement fixées sur les longueurs du support 13.In this example, the means making it possible to move the polishing unit 11, 12 linearly in the direction of the rail 1 are constituted by two double-acting cylinders, the cylinders 14 of which are integral with the engine 12 while the pistons (not shown) are integral with rods 15 rigidly fixed over the lengths of the support 13.

Le support 13 est relié au cadre 10 par quatre bielles 16 articulées sur le support 13 à l'une de leurs extrémités et sur le cadre 10 à leur autre extrémité suivant des axes s'étendant parallèlement à l'axe longitudinal du support 13 et donc sensiblement parallèle à l'axe longitudinal du rail 1,2.The support 13 is connected to the frame 10 by four connecting rods 16 articulated on the support 13 at one of their ends and on the frame 10 at their other end along axes extending parallel to the longitudinal axis of the support 13 and therefore substantially parallel to the longitudinal axis of the rail 1,2.

L'assemblage consitué par le cadre 10, le support 13 et les bielles 16 forme un parallèlogramme déformable permettant au support 13 de se déplacer suivant une direction transversale, soit perpendiculaire à l'axe longitudinal du rail. Ce parallèlogramme déformable, constitue des moyens de translation permettant au support 13 de se déplacer par rapport au cadre 10 transversalement par rapport au rail, c'est-à-dire suivant une direction approximativement perpendiculaire à l'axe longitudinal de ce rail 1,2.The assembly formed by the frame 10, the support 13 and the connecting rods 16 forms a deformable parallelogram allowing the support 13 to move in a transverse direction, ie perpendicular to the longitudinal axis of the rail. This deformable parallelogram constitutes translation means allowing the support 13 to move relative to the frame 10 transversely relative to the rail, that is to say in a direction approximately perpendicular to the longitudinal axis of this rail 1,2 .

Le support 13 comporte au moins un galet d'appui, ici deux galets d'appui 17, tourillonnés fous sur des axes verticaux, donc perpendiculaires au plan du support. Ces galets d'appui sont chacun associés à un ensemble de polissage 11,12 et sont situés à proximité immédiate de l'axe de la meule 11 correspondante.The support 13 comprises at least one support roller, here two support rollers 17, journalled idly on vertical axes, therefore perpendicular to the plane of the support. These support rollers are each associated with a polishing assembly 11, 12 and are located in the immediate vicinity of the axis of the corresponding grinding wheel 11.

Dans l'exemple illustré ces galets 17 sont destinés à prendre contact contre le flanc intérieur du champignon 2 du rail 1 et ne peuvent donc pas toujours être situés dans un même plan, perpendiculaire à l'axe longitudinal du rail, que l'axe de rotation de la meule 11 correspondante ce qui serait la position optimale pour obtenir le meilleur guidage de cette meule. Ceci pourrait être réalisé lorsque l'angle φ est suffisant ou alors dans une exécution où les galets 17 seraient destinés à entrer en contact avec le flanc extérieur du champignon 2 du rail. Une telle solution n'est toutefois pas toujours possible lorsqu'il y a des obstacles à l'extérieur du rail.In the example illustrated, these rollers 17 are intended to make contact against the internal flank of the head 2 of the rail 1 and therefore cannot always be situated in the same plane, perpendicular to the longitudinal axis of the rail, as the axis of rotation of the corresponding grinding wheel 11 which would be the optimal position to obtain the best guidance for this wheel. This could be achieved when the angle φ is sufficient or else in an embodiment where the rollers 17 are intended to come into contact with the outer flank of the head 2 of the rail. However, such a solution is not always possible when there are obstacles outside the rail.

Le support 13 est encore relié au cadre 10 par deux vérins de poussée 18 dont le cylindre est articulé sur des montants faisant partie du cadre 10 tandis que la tige portant le piston est articulée sur le support 13. Ces vérins 18 permettent de maintenir les galets 17 appliqués contre le flanc du champignon 2 du rail 1 avec une force déterminée.The support 13 is also connected to the frame 10 by two thrust jacks 18, the cylinder of which is articulated on uprights forming part of the frame 10 while the rod carrying the piston is articulated on the support 13. These jacks 18 make it possible to maintain the rollers 17 applied against the side of the mushroom 2 of the rail 1 with a determined force.

Ainsi le guidage du support et donc des unités de polissage est effectué de façon extrêmement précise, indépendamment des oscillations latérales du véhicule ou du chariot et donc du cadre 10. Ce guidage est également indépendant du poids des éventuels chariots et du cadre 10. De plus, les points d'appui de ce guidage sont situés au voisinage immédiat de l'axe des meules 11 de sorte que la précision du guidage est efficace tant sur les portions rectilignes de la voie que pour des courbes ou contrecourbes de celles-ci. En effet, la distance séparant les deux galets d'appui 17 est très faible par rapport au rayon de courbure d'une courbe de la voie ferrée de sorte que même en courbe la position des meules 11 par rapport au rail 1,2 est toujours assurée avec précision (quelque dixième de mm).Thus the guiding of the support and therefore of the polishing units is carried out in an extremely precise manner, independently of the lateral oscillations of the vehicle or of the carriage and therefore of the frame 10. This guidance is also independent of the weight of any carriages and of the frame 10. In addition , the support points of this guide are located in the immediate vicinity of the axis of the grinding wheels 11 so that the precision of the guide is effective both on the straight portions of the track and for curves or counter-curves thereof. Indeed, the distance separating the two support rollers 17 is very small compared to the radius of curvature of a curve of the railway track so that even in curve the position of the grinding wheels 11 relative to the rail 1,2 is always ensured with precision (some tenth of mm).

Grâce à ce dispositif de guidage précis il est possible d'utiliser des meules lapidaires de forme pour le polissage en voie des rails et donc de supprimer par une passe de finissage les facettes de meulage, de supprimer également les stries transversales par la position des meules dont l'axe de rotation est contenu dans un plan perpendiculaire à l'axe longitudinal du rail et d'éviter tout endommagement des meules grâce au guidage précis de celles-ci directement par rapport au rail indépendamment des mouvements transversaux du véhicule ou du chariot les portant et avec une force réduite, ne dépendant pas du poids de l'éventuel chariot et du cadre 10.Thanks to this precise guiding device it is possible to use lapidary shaped grinding wheels for polishing the rails and therefore to remove the grinding facets with a finishing pass, also to remove the transverse ridges by the position of the grinding wheels. the axis of rotation of which is contained in a plane perpendicular to the longitudinal axis of the rail and to avoid any damage to the grinding wheels thanks to the precise guidance of the latter directly relative to the rail independently of the transverse movements of the vehicle or of the carriage. bearing and with reduced force, not dependent on the weight of the possible carriage and of the frame 10.

Il est évident qu'un second support 13 peut être prévu pour porter des unités de polissage coopérant avec l'autre rail de la voie. Ce second support est alors monté de la même façon que celle décrite précédemment sur le cadre 10, symétriquement par rapport à l'axe longitudinal de la voie, soit à l'axe longitudinal de ce cadre 10.It is obvious that a second support 13 can be provided for carrying polishing units cooperating with the other rail of the track. This second support is then mounted in the same way as that described above on the frame 10, symmetrically with respect to the longitudinal axis of the track, ie to the longitudinal axis of this frame 10.

La figure 5 illustre une variante de l'unité de polissage dans laquelle l'ensemble ou les ensembles formés par un moteur 12 et une meule lapidaire de forme 11 ont un axe toujours compris dans un plan perpendiculaire à l'axe longitudinal du support 13, donc du rail 1,2, mais incliné d'un angle φ (voir Figure 1) par rapport à une direction verticale, perpendiculaire au plan de la voie. Une telle disposition de l'ensemble moteur 12 - meule 11 est particulièrement avantageuse pour le polissage de la totalité de la surface de roulement du rail voir même d'une partie du congé extérieur du rail.FIG. 5 illustrates a variant of the polishing unit in which the assembly or assemblies formed by a motor 12 and a lapidary wheel of shape 11 have an axis always included in a plane perpendicular to the longitudinal axis of the support 13, therefore rail 1.2, but inclined at an angle φ (see Figure 1) relative to a vertical direction, perpendicular to the plane of the track. Such an arrangement of the motor 12 - grinding wheel 11 assembly is particularly advantageous for the polishing of the entire running surface of the rail or even of a part of the external leave of the rail.

La variante illustrée à la figure 6 montre une réalisation différente du galet d'appui pivoté sur le support 13. Dans cette réalisation le galet présente la forme d'un disque 19 biseauté solidaire d'un axe 20 pivoté sur le support 13 par l'intermédiaire de roulements à billes 21. Cette disposition du ou des galets d'appui est particulièrement intéressante car elle permet d'obtenir un encombrement réduit du côté intérieur du rail.The variant illustrated in Figure 6 shows a different embodiment of the support roller pivoted on the support 13. In this embodiment the roller has the shape of a beveled disc 19 secured to an axis 20 pivoted on the support 13 by the intermediate ball bearings 21. This arrangement of the support roller (s) is particularly advantageous because it makes it possible to obtain a reduced bulk on the inside of the rail.

Dans les formes d'exécution précédentes le dispositif de polissage comporte un cadre et deux unités de polissage montées sur un support qui, du fait de sa liaison au cadre sous forme de parallèlogramme déformable, subit une légère variation de hauteur, soit un déplacement dans le sens vertical, lorsqu'il est déplacé transversalement par rapport au rail. Ces variations en hauteur sont faibles et peuvent aisément être compensées par la course des vérins 14.In the previous embodiments, the polishing device comprises a frame and two polishing units mounted on a support which, due to its connection to the frame in the form of a deformable parallelogram, undergoes a slight variation in height, ie a displacement in the vertical direction, when moved transversely to the rail. These variations in height are small and can easily be compensated for by the stroke of the jacks 14.

Dans certains cas toutefois, il est désirable de faire en sorte que le déplacement transversal du support par rapport au cadre soit rigoureusement rectiligne. Une telle forme d'exécution est illustrée aux figures 7 et 8 à titre d'exemple.In some cases, however, it is desirable to ensure that the transverse movement of the support relative to the frame is strictly rectilinear. Such an embodiment is illustrated in Figures 7 and 8 by way of example.

Dans cette forme d'exécution le cadre 10 est muni de lames porteuses 22 s'étendant vers le bas dont l'extrémité inférieure est munie de deux perçages calibrés. Pour chaque support 13 le cadre est muni de deux lames porteuses 22 au moins disposées de part et d'autre du support.In this embodiment, the frame 10 is provided with carrier blades 22 extending downwards, the lower end of which is provided with two calibrated holes. For each support 13, the frame is provided with two carrying blades 22 at least arranged on either side of the support.

Dans cette forme d'exécution le support 13 est prévu pour une unité de polissage comportant un seul ensemble meule 11 - moteur 12 toujours monté sur ce support par l'intermédiaire de vérins 14.In this embodiment the support 13 is provided for a polishing unit comprising a single assembly grinding wheel 11 - motor 12 always mounted on this support by means of jacks 14.

Ce support 13 présente ici la forme générale d'un cadre carré muni de deux entretoises sur lesquelles les tiges des vérins 14 sont fixées. Ce support 13 présente également deux galets d'appui 17 destinés à entrer en contact avec le flanc interne du champignon 2 du rail.This support 13 has here the general shape of a square frame provided with two spacers on which the rods of the jacks 14 are fixed. This support 13 also has two support rollers 17 intended to come into contact with the internal flank of the head 2 of the rail.

Le cadre 13 est muni de deux tiges ou coulisses 23, respectivement 24 sur chacun de ses côtés latéraux s'étendant perpendiculairement à l'axe longitudinal du rail et coulissant sans jeu dans les perçages calibrés des lames porteuses 22. Ainsi le support 13 est déplaçable transversalement au rail par rapport au cadre 10 de façon rectiligne.The frame 13 is provided with two rods or slides 23, respectively 24 on each of its lateral sides extending perpendicular to the longitudinal axis of the rail and sliding without play in the calibrated holes of the carrier blades 22. Thus the support 13 is movable transversely to the rail relative to the frame 10 in a straight line.

Les extrémités des deux tiges 24 sont réunies par une plaque 25 sur laquelle est articulée la tige du vérin 18 qui permet d'appliquer les galets 17 contre le flanc interne du champignon 2 du rail.The ends of the two rods 24 are joined by a plate 25 on which the rod of the jack 18 is articulated which makes it possible to apply the rollers 17 against the internal flank of the head 2 of the rail.

Dans la forme d'exécution illustrée aux figures 9 et 10 le dispositif de polissage comporte un support 13 comme celui décrit en référence aux figures 3 et 4 relié au cadre 10 par des bielles 16 et des vérins 18 et présentant des galets d'appui 17 entrant en contact avec le flanc interne du champignon 2 du rail.In the embodiment illustrated in FIGS. 9 and 10, the polishing device comprises a support 13 like that described with reference to FIGS. 3 and 4 connected to the frame 10 by connecting rods 16 and jacks 18 and having support rollers 17 coming into contact with the internal side of the head 2 of the rail.

Dans cette forme d'exécution l'unité de polissage comporte deux ensembles meule 11 - moteur 12 reliés rigidement par des jougs 27 inférieurs. Le chariot 13 comporte encore des jougs supérieurs 26 solidaires des jougs 27 de ce support. Cette unité de polissage est munie de galets de guidage 28 coopérant avec des guides 29 du support 13 permettant un déplacement de l'unité de polissage en direction du rail par rapport au support 13. Ce déplacement des meules en direction du rail est commandé par un vérin central dont le piston est solidaire d'une tige supérieure 31 dont l'extrémité est montée coulissant entre les jougs supérieurs 26 tandis que la tige inférieure 32 de ce vérin central est articulée sur les jougs inférieurs 27. Des dispositifs de blocage 33,34 permettent d'immobiliser l'extrémité supérieure de la tige 31 par rapport aux jougs 26. En fonctionnement, des dispositifs de blocage 33,34 sont libérés, ainsi, lorsque les deux ensembles de l'unité de polissage sont déplacés simultanément vers le rail par le vérin central 30 les forces d'appui des deux meules 11 contre le rail s'équilibrent automatiquement.In this embodiment, the polishing unit comprises two grinding wheel 11 - motor 12 assemblies rigidly connected by lower yokes 27. The carriage 13 also has upper yokes 26 integral with the yokes 27 of this support. This polishing unit is provided with guide rollers 28 cooperating with guides 29 of the support 13 allowing a movement of the polishing unit in the direction of the rail relative to the support 13. This movement of the grinding wheels in the direction of the rail is controlled by a central jack whose piston is integral with an upper rod 31 whose end is mounted sliding between the upper yokes 26 while the lower rod 32 of this central jack is articulated on the lower yokes 27. Locking devices 33, 34 make it possible to immobilize the upper end of the rod 31 relative to the yokes 26. In operation, blocking devices 33, 34 are released, thus, when the two assemblies of the polishing unit are moved simultaneously towards the rail by the central jack 30 the bearing forces of the two grinding wheels 11 against the rail are balanced automatically.

Il est évident que deux galets d'appui du type décrits en référence à la figure 6 pourraient être utilisés dans cette forme d'exécution de l'unité de polissage à double ensemble meule 11 - moteur 12.It is obvious that two support rollers of the type described with reference to FIG. 6 could be used in this embodiment of the polishing unit with a double set of grinding wheel 11 - motor 12.

Dans une variante les deux meules 11 pourraient être entraînées en rotation à partir d un seul moteur 12 par l'intermédiaire d'une liaison cinématique adéquate, engrenage, courroie etc.In a variant, the two grinding wheels 11 could be rotated from a single motor 12 by means of an adequate kinematic link, gear, belt, etc.

Les figures 11 et 12 illustrent une forme d'exécution dans laquelle le cadre 10 du dispositif de polissage est monté directement sur un véhicule ferroviaire V par l'intermédiaire des moyens de relevage, ici constitués par un vérin à double effet dont le cylindre 40 est solidaire du véhicule V tandis que la tige 41 portant son piston est solidaire du cadre 10.Figures 11 and 12 illustrate an embodiment in which the frame 10 of the polishing device is mounted directly on a rail vehicle V via the lifting means, here constituted by a double-acting cylinder whose cylinder 40 is secured to the vehicle V while the rod 41 carrying its piston is secured to the frame 10.

Ce cadre 10 est donc déplaçable verticalement par rapport au véhicule V et est guidé dans ses déplacements par les guides 42 solidaires du véhicule V coulissant dans des passages du cadre 10 prévu à cet effet. La course du cadre 10 par rapport au véhicule V est limitée tant vers le haut que vers le bas, le cadre 10 entrant en contact avec des parties du véhicule V constituant des butées de fin de course haute 43 ou basse 44 respectivement.This frame 10 is therefore movable vertically relative to the vehicle V and is guided in its movements by the guides 42 integral with the vehicle V sliding in passages of the frame 10 provided for this purpose. The stroke of the frame 10 relative to the vehicle V is limited both upwards and downwards, the frame 10 coming into contact with parts of the vehicle V constituting high 43 or low 44 end-of-travel stops respectively.

Dans cet exemple chaque cadre 10 porte deux supports 13 par file de rail et chaque support 13 porte une unité de polissage comprenant deux ensembles meule 11 - moteur 12. Ces supports 13 et leurs unités de polissage sont telles que décrites en référence aux figures 9 et 10.In this example, each frame 10 carries two supports 13 per rail file and each support 13 carries a polishing unit comprising two grinding wheel 11 - motor 12 assemblies. These supports 13 and their polishing units are as described with reference to FIGS. 9 and 10.

Dans certains cas où la précision du polissage doit être particulièrement grande, on peut munir le support 13 d'un outil de rectification de la forme de la meule 11. La figure 13 illustre schématiquement un tel outil de rectifiage de la meule 11. Sur le support 13 est fixé un vérin à double effet 45 dont la tige 46, actionnée par le piston, est munie d'une butée 48 et porte à son extrémité un outil de rectification 47, rotatif ou non, dont la tranche 49 correspond à la forme désirée de la partie active A de la face frontale de la meule lapidaire 11. Pour rectifier la meule 11, il suffit d'approcher l'outil de rectification 47 de la meule à l'aide du vérin 45,46 lorsque la meule est en travail sur le rail.In certain cases where the polishing precision must be particularly high, the support 13 can be provided with a tool for rectifying the shape of the grinding wheel 11. FIG. 13 schematically illustrates such a tool for grinding the grinding wheel 11. On the support 13 is fixed a double-acting cylinder 45 whose rod 46, actuated by the piston, is provided with a stop 48 and carries at its end a grinding tool 47, rotary or not, whose edge 49 corresponds to the shape desired of the active part A of the front face of the lapidary grinding wheel 11. To grind the grinding wheel 11, it suffices to approach the grinding tool 47 of the grinding wheel using the jack 45,46 when the grinding wheel is in work on the rail.

La figure 14 illustre une variante de cet outil de rectifiage de la meule dans laquelle l'outil 47 est fixé rigidement au support 13. Dans ce cas, pour rectifier la meule celle-ci est avancée, lorsqu'elle n'est pas en travail, en direction de l'outil 47 par les vérins 14 d'avance de l'unité de polissage.FIG. 14 illustrates a variant of this grinding wheel grinding tool in which the tool 47 is rigidly fixed to the support 13. In this case, to grind the grinding wheel it is advanced, when it is not in work , towards the tool 47 by the jacks 14 in advance of the polishing unit.

De nombreuses variantes du dispositif de polissage décrit peuvent être envisagées, notamment il est possible en variant l'inclinaison de l'axe des ensembles meule 11 - moteur 12, toujours situé dans un plan perpendiculaire à l'axe longitudinal du rail, de polir toutes les parties du champignon 2 du rail, soit la surface de roulement et les deux congés, interne et externe.Many variants of the polishing device described can be envisaged, in particular it is possible by varying the inclination of the axis of the grinding wheel 11 - motor 12 assemblies, always situated in a plane perpendicular to the longitudinal axis of the rail, to polish all the parts of the head 2 of the rail, ie the running surface and the two leaves, internal and external.

Pour un guidage optimal notamment en courbe, il faut un galet par meule, placé si possible dans le plan perpendiculaire au rail et contenant l'axe de la meule. L'encombrement des pièces ne permet en pratique généralement pas une telle réalisation. De ce fait, la construction réalisée comprend un galet par meule, situé au plus près dudit plan.For optimal guidance, especially in curves, one roller per grinding wheel is required, placed if possible in the plane perpendicular to the rail and containing the axis of the grinding wheel. The size of the parts generally does not allow such an embodiment in practice. As a result, the construction carried out comprises one roller per grinding wheel, located as close as possible to said plane.

Un galet unique pour deux meules peut également être concevable, ce galet est alors situé entre les deux meules d'un ensemble à deux unités de polissage. L'avance des vérins d'appui doit être alors synchronisée pour assurer un déplacement du support 13 parallèle à l'axe du cadre 10. Sur certains réseaux de chemin de fer ne présentant pas d'obstacle au voisinage immédiat du rail à l'extérieur de la voie le montage de galet de guidage dans le plan perpendiculaire au rail et contenant l'axe de la meule est indiqué.A single roller for two wheels can also be conceivable, this roller is then located between the two wheels of a set with two polishing units. The advance of the support cylinders must then be synchronized to ensure a displacement of the support 13 parallel to the axis of the frame 10. On certain railway networks having no obstacle in the immediate vicinity of the rail outside of the track the mounting of guide roller in the plane perpendicular to the rail and containing the axis of the grinding wheel is indicated.

Le déplacement de la meule selon son axe, pour compenser son usure, est la meilleure solution car la position relative de la meule par rapport au rail reste inchangée. Toutefois, un déplacement selon une direction différente est concevable. Par exemple dans le cas d'un groupe de deux meules d'inclinaisons différentes, il est opportun de prendre pour le déplacement une direction intermédiaire à celles des deux inclinaisons.Moving the wheel along its axis, to compensate for its wear, is the best solution because the relative position of the wheel relative to the rail remains unchanged. However, a displacement in one direction different is conceivable. For example in the case of a group of two grinding wheels of different inclinations, it is advisable to take for the displacement a direction intermediate to those of the two inclinations.

Dans les formes d'exécution décrites précédemment, le dispositif est plus particulièrement destiné au meulage fin ou polissage du rail pour en supprimer toutes stries et facettes. C'est pourquoi dans ces dispositifs décrits, on utilise des meules de forme dont l'axe n'intersecte pas l'axe longitudinal du rail.In the embodiments described above, the device is more particularly intended for fine grinding or polishing of the rail to remove any streaks and facets. This is why in these described devices, grinding wheels are used whose axis does not intersect the longitudinal axis of the rail.

Mais grâce à la conception du présent dispositif de meulage, il est possible d'améliorer radicalement le guidage d'unité de meulage à meules lapidaires à surface de meulage plane ou de meules périphériques pour le meulage intensif du rail.However, thanks to the design of the present grinding device, it is possible to radically improve the guidance of grinding unit with lapidary grinding wheels with planar grinding surface or peripheral grinding wheels for intensive rail grinding.

Les figures 15 et 16 illustrent une telle application du dispositif selon l'invention, semblable au dispositif illustré aux figures 3 et 4 mais utilisant une meule lapidaire à face frontale plane pour chaque unité de reprofilage et dans lequel les unités de meulage sont déplaçables en outre autour d'un axe parallèle à l'axe longitudinal du rail.FIGS. 15 and 16 illustrate such an application of the device according to the invention, similar to the device illustrated in FIGS. 3 and 4 but using a lapidary wheel with a flat front face for each reprofiling unit and in which the grinding units are also movable around an axis parallel to the longitudinal axis of the rail.

Dans cette forme d'exécution, chaque unité de meulage et formée d'un moteur 50 dont l'axe entraîne une meule lapidaire 51 en rotation. Cette meule lapidaire 51 présente une face frontale de travail plane et est donc capable de supporter de fortes charges et donc d'effectuer si nécessaire un meulage intensif du champignon 2 du rail 1.In this embodiment, each grinding unit and formed by a motor 50 whose axis drives a lapidary wheel 51 in rotation. This lapidary wheel 51 has a flat working front face and is therefore capable of supporting heavy loads and therefore of performing, if necessary, intensive grinding of the fungus 2 of the rail 1.

Les deux unités de meulage 50,51 sont montées sur un berceau 52 par l'intermédaire de vérins 53 permettant de déplacer ces unités linéairement par rapport au berceau 52 parallèlement à l'axe du moteur 50 et donc perpendiculairement à l'axe longitudinal du rail. Le berceau 52 est formé de longerons 52a et de plaques d'extrémités 52b, plaques 52b qui sont pivotées sur les turillons 54 solidaire d'un support 55. Des vérins à double effet 56 relient le berceau 52 au support 55 et permettent de régler et de positionner le berceau 52 angulairement par rapport au support 55 et ainsi de déterminer la zone longitudinale du champignon du rail 2 sur laquelle travaillera la meule 51.The two grinding units 50, 51 are mounted on a cradle 52 by means of jacks 53 making it possible to move these units linearly relative to the cradle 52 parallel to the axis of the motor 50 and therefore perpendicular to the longitudinal axis of the rail. The cradle 52 is formed of side members 52a and end plates 52b, plates 52b which are pivoted on the spurs 54 secured to a support 55. Double-acting cylinders 56 connect the cradle 52 to the support 55 and make it possible to adjust and to position the cradle 52 angularly with respect to the support 55 and thus to determine the longitudinal zone of the head of the rail 2 on which the grinding wheel 51 will work.

Le support 55 est relié comme dans les autres formes d'exécution au cadre 10 par des bielles 16 et un vérin 18 permet d'appliquer les galets 17 du support 55 contre le flan interne du rail.The support 55 is connected as in the other embodiments to the frame 10 by connecting rods 16 and a jack 18 allows the rollers 17 of the support 55 to be applied against the internal blank of the rail.

Claims (11)

  1. Device for the grinding or the burnishing of the surface of the head of at least one rail (1,2) of a railway track comprising a rigid frame (10) connected to the framing of a railroad vehicle (V), by lifting means (40,41) allowing a light running of the railroad vehicle; this frame being guided along the railway track; device comprising at least one grinding (11,12) unit composed of an assembly of at least one grinding wheel (11), driven in rotation by a motor (12), each assembly forming a grinding unit (11,12) which is mounted on a corresponding support (13) being able to move linearly thus allowing to move the grinding wheel towards and away of the surface of the rail to be grinded; and in which the axis of each grinding wheel (11) is located in a plane perpendicular to the longitudinal axis of the rail (1,2) characterized by the fact that each support (13) is independently mounted on the frame (10) by translatory motion means (16) allowing the said support (13) to move itself with regards to the frame (10) transversally with regards to the rail (1,2); and by the fact that each support (13) comprises at least one support roller (17) and resting means (18), connecting this support (13) to the frame (10) and applying this support roller (17) against one of the sides of the rail (1,2) at the immediate proximity of the corresponding grinding unit (11,12).
  2. Device according to claim 1, characterized by the fact that the frame (10) is connected to a trolley rolling on the railway track and driven by a railroad vehicle (V).
  3. Device according to claim 1, characterized by the fact that the frame (10) is directly connected to the railroad vehicle (V) by the lifting and guiding means (40-42).
  4. Device according to one of the previous claims, characterized by the fact that the grinding unit (11,12) comprises at least one grinding wheel (11) driven in rotation by a motor (12).
  5. Device according to one of the claims 1 to 3, characterized by the fact that the grinding unit comprises several assemblies each made up of one grinding unit (11) and its driving motor (12).
  6. Device according to claim 5, characterized by the fact that the rotation axis of the grinding wheels (11) of all the assemblies (11,12) are parallel.
  7. Device according to claim 5, characterized by the fact that the rotation axis of the grinding wheels (11) are forming an angle between them, the direction of displacement of the grinding unit (11,12) towards the rail (1,2) being comprised inside this angle.
  8. Device according to one of the previous claims, characterized by the fact that it comprises as many support rollers (17) as grinding wheels (11).
  9. Device according to one of the claims 1 to 7, characterized by the fact that it comprises two support rollers (17) for each grinding wheel (11).
  10. Device according to one of the claims 8 or 9, characterized by the fact that the grinding wheel (11) is shaped grinding wheel and by the fact that the contact line between the grinding wheel (11) and the surface of the rail (1,2) is contained in a plane perpendicular to the longitudinal axis of the rail.
  11. Device according to one of the claims 8 or 9, characterized by the fact that the grinding wheel (51) presents a planar grinding face; by the fact that the grinding unit (50,51) is mounted on a framing (52) articulated on the support (55) around an axis parallel to the longitudinal axis of the rail (1,2); and by the fact that means (50) are provided to determine the angular service position of this framing (52) with respect to the support (55).
EP92101786A 1991-03-01 1992-02-04 Device for reshaping railway rails Expired - Lifetime EP0501183B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH652/91A CH685129A5 (en) 1991-03-01 1991-03-01 Device for reprofiling the rails of a railway.
CH652/91 1991-03-01

Publications (2)

Publication Number Publication Date
EP0501183A1 EP0501183A1 (en) 1992-09-02
EP0501183B1 true EP0501183B1 (en) 1995-03-29

Family

ID=4192007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92101786A Expired - Lifetime EP0501183B1 (en) 1991-03-01 1992-02-04 Device for reshaping railway rails

Country Status (11)

Country Link
US (1) US5265379A (en)
EP (1) EP0501183B1 (en)
JP (1) JPH05106203A (en)
AT (1) ATE120507T1 (en)
AU (1) AU650952B2 (en)
CA (1) CA2061787A1 (en)
CH (1) CH685129A5 (en)
DE (2) DE501183T1 (en)
ES (1) ES2033639T1 (en)
GR (1) GR920300104T1 (en)
ZA (1) ZA921509B (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2703083B1 (en) * 1993-03-25 1995-06-23 Geismar Anc Ets L RAIL TRACK GRINDING MACHINE.
EP0835960A1 (en) * 1996-10-11 1998-04-15 Scheuchzer S.A. Apparatus for profiling grinding wheels for reprofiling a rail head
US6033291A (en) * 1998-03-16 2000-03-07 Loram Maintenance Of Way, Inc. Offset rail grinding
AT411912B (en) * 2000-07-17 2004-07-26 Linsinger Maschinenbau Gmbh METHOD FOR GRINDING A RAIL AND DEVICE FOR IMPLEMENTING THE METHOD
AT410951B (en) * 2000-07-17 2003-09-25 Linsinger Maschinenbau Gmbh METHOD FOR REPROFILING AT LEAST THE TRAVEL MIRROR OF A RAIL AND DEVICE THEREFOR
US6832558B2 (en) * 2002-10-11 2004-12-21 Nordco Inc. Riding rail tie plugging apparatus
US6974579B2 (en) * 2004-01-08 2005-12-13 Allergan, Inc. Methods for treating vascular disorders
US7179474B2 (en) * 2004-09-03 2007-02-20 Allergan, Inc. Methods for treating a buttock deformity
EP3026179B1 (en) * 2012-01-19 2020-03-11 Loram Maintenance Of Way, Inc. A device for milling of railroad track
AT513367B1 (en) * 2012-09-13 2014-11-15 Vossloh Mfl Rail Milling Gmbh Method and device for force-dependent control in rail machining
US9617691B2 (en) 2013-03-15 2017-04-11 Greenleaf Technology Corporation Rail re-profiling method and apparatus
JP6667143B2 (en) * 2014-06-24 2020-03-18 ファマ エス．アール．エル． Tangential grinding machine
FR3025228B1 (en) * 2014-09-03 2016-12-23 Robert Pouget AUTONOMOUS GRANULAR GRINDING MACHINE HAVING VERTICAL AND LATERAL CORRELATED WEAR DEFECTS
CN110130165B (en) * 2018-02-09 2024-03-15 中国铁建高新装备股份有限公司 Positioning device suitable for steel rail online milling operation
WO2020046792A1 (en) * 2018-08-27 2020-03-05 Harsco Technologies LLC Rail milling vehicle
US20240084520A1 (en) 2020-12-22 2024-03-14 Schweerbau International Gmbh & Co. Kg Device and method for grinding a profile
RU2759298C1 (en) * 2021-02-12 2021-11-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет путей сообщений" (СГУПС) Method for processing the surface of the rail head and a device for its implementation

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH463555A (en) * 1967-08-08 1968-10-15 Speno Internat S A Railway track deburring machine
AT344771B (en) * 1975-12-01 1978-08-10 Plasser Bahnbaumasch Franz MOBILE RAIL GRINDING MACHINE
AT344772B (en) * 1975-12-01 1978-08-10 Plasser Bahnbaumasch Franz RAIL GRINDING MACHINE
CH606616A5 (en) * 1976-02-18 1978-11-15 Speno International
US4205494A (en) * 1979-01-18 1980-06-03 Speno Rail Services, Inc. Rail grinding apparatus
CH633336A5 (en) * 1980-01-09 1982-11-30 Speno International RAILWAY SITE MACHINE FOR THE GRINDING OF RAIL MUSHROOM.
CH654047A5 (en) * 1983-09-16 1986-01-31 Speno International Method and device for continuous reshaping rails of railways.
CH666068A5 (en) * 1983-11-16 1988-06-30 Speno International DEVICE FOR THE CONTINUOUS REPROFILING OF THE MUSHROOM OF AT LEAST ONE RAIL.
CH655528B (en) * 1984-02-06 1986-04-30
US4785589A (en) * 1986-02-28 1988-11-22 Les Fils D'auguste Scheuchzer S.A. Process for measuring and grinding the profile of a rail head
US4862647A (en) * 1987-08-31 1989-09-05 Loram Maintenance Of Way, Inc. Rail grinding machine
CH675440A5 (en) * 1988-03-04 1990-09-28 Speno International
DE3868631D1 (en) * 1988-05-30 1992-04-02 Scheuchzer Fils Auguste RAIL GRINDING MACHINE.
CH678341A5 (en) * 1989-03-02 1991-08-30 Speno International
CH680598A5 (en) * 1989-08-28 1992-09-30 Speno International

Also Published As

Publication number Publication date
ES2033639T1 (en) 1993-04-01
AU1135592A (en) 1992-09-03
AU650952B2 (en) 1994-07-07
DE69201811D1 (en) 1995-05-04
JPH05106203A (en) 1993-04-27
ATE120507T1 (en) 1995-04-15
EP0501183A1 (en) 1992-09-02
GR920300104T1 (en) 1993-02-17
CA2061787A1 (en) 1992-09-02
CH685129A5 (en) 1995-03-31
ZA921509B (en) 1992-10-28
US5265379A (en) 1993-11-30
DE69201811T2 (en) 1995-09-28
DE501183T1 (en) 1992-12-17

Similar Documents

Publication Publication Date Title
EP0501183B1 (en) Device for reshaping railway rails
EP0154777B1 (en) Device for the on-track rectification of the rail head of at least one rail of a railroad track
FR2463230A1 (en) MACHINE FOR TREATING THE SURFACE OF MUSHROOMS OF RAILS OF A POSTED RAILWAY
CH626673A5 (en)
EP0017520B1 (en) Apparatus for aligning and holding two rail ends to be joined together by welding
EP0330842B1 (en) Apparatus for reprofiling a railway
EP0145919B1 (en) Device for continuously reprofiling the head of at least one rail
CH678341A5 (en)
EP0031480B1 (en) Grinding device for the continuous reprofiling of a rail of a railway track
EP0016664B1 (en) Apparatus for aligning and setting the gap between two rail-ends
FR2615216A1 (en) RIBBON GRINDING APPARATUS FOR A GRID MILLING MACHINE FOR GRANULARIZING IRREGULARITIES ON THE SURFACE OF RAIL FUNGUS OF ONE or both RAILS OF AN APPLIED RAILWAY
FR2463228A1 (en) MOBILE MACHINE ON A RAILWAY TRACK TO ELIMINATE RAIL SURFACE DEFECTS
EP2337897B1 (en) Device for railway maintenance
EP0358697A1 (en) Device for guiding and supporting a railway vehicle.
CH670667A5 (en) Rail reshaping equipment for railway track - has chassis supported on wheels at one side and with endless grinding belt other side
CH690963A5 (en) A device for finishing the reprofiling means and continuously from the surface of the head of at least one rail of a railway track.
FR2463229A1 (en) RUBBING MACHINE EQUIPPED WITH ROTS AND MOVING ON A RAILWAY TRACK AND TOOLS EQUIPPED WITH SUCH A MACHINE
FR2557488A1 (en) REPROFILING MACHINE USED RAILS
FR2689150A1 (en) Railway tamping machine.
EP0125348B1 (en) Machine for reprofiling rail heads
FR2522568A1 (en) GRINDING MACHINE
EP0789108A1 (en) Carriage provided with grinding or machining tools for the rolling surface and the mushroom portion of railway rails
EP0888230B1 (en) Intervention device for railway maintenance and repair
FR2703084A1 (en) Machine for grinding rails of a railway track
FR2731239A1 (en) Centring and adjusting device for laying railway sleepers using train

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE

ITCL It: translation for ep claims filed

Representative=s name: CON LOR

TCNL Nl: translation of patent claims filed
GBC Gb: translation of claims filed (gb section 78(7)/1977)
TCAT At: translation of patent claims filed
DET De: translation of patent claims
17P Request for examination filed

Effective date: 19930118

REG Reference to a national code

Ref country code: ES

Ref legal event code: BA2A

Ref document number: 2033639

Country of ref document: ES

Kind code of ref document: T1

17Q First examination report despatched

Effective date: 19940128

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19950329

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19950329

Ref country code: DK

Effective date: 19950329

REF Corresponds to:

Ref document number: 120507

Country of ref document: AT

Date of ref document: 19950415

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69201811

Country of ref document: DE

Date of ref document: 19950504

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950510

ITF It: translation for a ep patent filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Effective date: 19950629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19950710

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19960204

Ref country code: AT

Effective date: 19960204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19960205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19960228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19960229

Ref country code: LI

Effective date: 19960229

Ref country code: CH

Effective date: 19960229

26N No opposition filed
BERE Be: lapsed

Owner name: S.A. SPENO INTERNATIONAL

Effective date: 19960228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19960901

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960204

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19961031

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19960901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19961101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050204