WO2021089668A1 - Method, device and rail vehicle for reprofiling railroad rail - Google Patents
Method, device and rail vehicle for reprofiling railroad rail Download PDFInfo
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- WO2021089668A1 WO2021089668A1 PCT/EP2020/081049 EP2020081049W WO2021089668A1 WO 2021089668 A1 WO2021089668 A1 WO 2021089668A1 EP 2020081049 W EP2020081049 W EP 2020081049W WO 2021089668 A1 WO2021089668 A1 WO 2021089668A1
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- rail
- laser beam
- reprofiling
- machining
- heads
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
- E01B31/02—Working rail or other metal track components on the spot
- E01B31/12—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
Definitions
- the invention relates to a method for reprofiling railway tracks, a reprofiling device for implementing this method and a rail vehicle equipped with at least one such reprofiling device.
- the present invention relates to the field of the reprofiling of rail tracks, whether it is traditional or high-speed railway lines, metro or tram lines or specific railways, such as those that we find it on industrial sites, mineral exploitation, aeronautical or port ports, etc ...
- the running surface of the rails namely the surface in contact with said vehicles, may be marked by various impacts, for example from ballasts, in addition to the matting that follows and its possible consequences, such as the formation of longitudinal undulations or a chipping effect, also called “head check”, or even cracking.
- the most common solution consists in carrying out a grinding of the rails, one of the problems of which is that it generates incandescent metal particles, which are regularly the cause of fires. Indeed, the accumulation of these incandescent metal particles, in particular on the structure of the railway vehicle equipped with suitable reprofiling means, creates incandescent slag. These, by falling on the tracks, can be sources of fires and damage directly on the tracks or on other mechanical or electrotechnical parts which equip them.
- railway vehicles or grinding trains equipped with such grinding systems are necessarily equipped with fire-fighting systems to mitigate, as far as possible, the significant risk of fire incurred during rail reprofiling operations.
- fire-fighting systems are generally in the form of suitable sprinkling systems, allowing preventive sprinkling upstream and / or downstream of the grinding, in order to limit the starting of fires and various deteriorations.
- this grinding reprofiling solution requires daily and tedious maintenance of the grinding trains, not only for the replacement of worn grinding wheels, but also for systematic cleaning of the reprofiling tools.
- a second technical solution more recently implemented to ensure the reprofiling of the rails of railways, is that of milling which makes it possible to remedy the problem of production of sparks and fine volatile particles and consequently, that of slag. incandescent fire generators.
- the milling producing ridges on the reprofiled running surface of the rail ridges which may extend transversely to the longitudinal axis of this rail, a finishing operation may be required downstream of the milling.
- This finish generally consisting of a suitable grinding, it can induce a production of sparks, dust and slag, even if it is in less quantity than with a grinding train.
- the milling is carried out by means of milling heads with multiple machining inserts, the profile of which is adapted to the machining operation carried out. For this reason, the choice of milling tools determines the profile of the running surface of the rail after reprofiling, a profile called the target profile below.
- the invention relates to a process for reprofiling railway tracks consisting in machining a surface of this rail intended to come into contact with the wheels of a railway vehicle, characterized in that this machining is carried out by laser rays. by moving, at a controlled speed axially to the rail and at a determined distance with respect to said surface to be machined of the rail, a defined number of laser beam heads extending transversely to the rail to cover said surface to be machined.
- the invention also relates to a device for reprofiling rails suitable for equipping a rail vehicle, characterized in that it comprises at least one support comprising means for fixing and connecting, in particular electrical, to said vehicle and equipped with a plurality of laser beam heads configured to extend transversely to a rail to be machined, said device further comprising means for adjusting the position called laser beam heads.
- the invention also relates to a railway vehicle equipped with at least one such reprofiling device.
- the essential advantages resulting from the present invention consist in that a reprofiling by laser beams and more particularly by laser beams with water jet, makes it possible to remedy all the drawbacks resulting from existing grinding or milling techniques.
- Other objects and advantages of the present invention will become apparent from the description which follows and which relates to an exemplary embodiment.
- FIG. 2 illustrates the action of a laser beam with a water jet in comparison to that of a traditional laser beam propagating in the air;
- Figure 3 is a schematic representation of
- FIG. 4 is a diagrammatic representation of the action of a plurality of lasers of a reprofiling device according to the invention on the surface of a rail to be reworked
- - Figure 5 is a schematic illustration of such a reprofiling device according to the invention
- FIG. 6 is an illustration of a railway vehicle equipped with at least one reprofiling device according to the invention.
- the present invention relates to a method and a device 1 for reprofiling railway tracks.
- the reprofiling action consists in machining this upper part 3 on a surface. 5 extending more on the inner side 6 of this rail 2, oriented towards the inside of the track, than relative to the outer side 7 with respect to this track. If we take as a frame of reference a vertical normal N with respect to this surface 5 in the upper part 3 of the rail 2, the reprofiling extends substantially, from the inside 6, until the normal to this surface 5 forms a angle of approximately -70 ° and an angle of approximately + 15 ° on the exterior side 7 with respect to this vertical normal N.
- the reprofiling method and device according to the invention can be implemented to reprofile a surface 5 of rail 2 extending more or less beyond or below the ranges indicated above. Consequently, the present invention is in no way limited to the reprofiling of a specific surface.
- this surface 5 to be reprofiled of the rail 2 is that which usually comes into contact with the wheels of railway vehicles coming to move on this rail 2.
- the reprofiling process according to the invention consisting in reprofiling, by removing a layer of material, this surface 5 is distinguished in that machining is carried out by laser beams, this by moving, at a controlled speed axially 8 to the rail 2 and at a distance 9 defined with respect to said surface 5, several laser beam heads 10 for cover the surface 5 to be reprofiled. In a manner more particularly advantageous to the invention, this machining is carried out by means of laser beam heads 10 under water jet.
- focal point 11 of a traditional laser is very close to the nozzle 13 for emitting laser rays.
- the machining by means of a conventional laser beam head imposes a reduced machining depth and the respect of a strict distance of the nozzle 13 of this laser beam head 10 with respect to the surface 5 to be reprofiled.
- the use of a laser beam head 10 with water jet has the advantage of providing more flexibility in the context of this reprofiling operation, whether in terms of machining depth, of implantation distance 9. laser beam heads 10 relative to the surface 5 of rail 2, while providing better machining quality.
- the laser under water jet makes it possible to produce, as can be seen in FIG. 3, a regular groove 15 at the level of the surface 5 of the rail 2.
- a regular groove 15 at the level of the surface 5 of the rail 2.
- a significant advantage of such a water jet laser beam machining consists in the fact that water limits the molten particles removed by the laser beam from being redeposited on the surface 5 of the rail 2, altering it. . Through elsewhere, the water contributes, at least in part, to the entrainment towards the soil of the particles collected, while cooling them and limiting the formation of slag. The risks of deterioration of electrical or mechanical equipment near the rail 2, but also of fire are, in fact, reduced by this absence of slag.
- the invention also relates to a device 1 for implementing the method for reprofiling rails according to the invention which, as shown schematically in FIG. 6, is suitable for fitting out a vehicle 17 for railways.
- This vehicle 17 can be likened to a train and can receive several devices 1 according to the invention, in particular for the reprofiling of each of the rails of a track.
- such a device 1 for reprofiling rails 2 in accordance with the invention comprises a support 18, which is advantageously equipped with means for fixing and connecting to said vehicle 17.
- Said connection means preferably comprise electrical connection means and / or by optical fiber laser beam heads 10, or even, in water if these laser beam heads 10 operate under water jet.
- the electrical connection means may comprise means for supplying electrical energy intended for the laser beam heads 10, or even means for adjusting the position of the latter, as will appear later in the description or further on.
- this control unit 19 can be deported and installed in a suitable control station in the vehicle 17.
- the reprofiling device 1 comprises a plurality of laser beam heads 10 configured to extend transversely to a rail 2 to be machined, knowing that this device 1 also comprises means for adjusting the position of said laser beam heads 10 in order to adjust their position with respect to this rail 2 to be machined, more particularly the surface 5 of this rail 2.
- these adjustment means can be defined by an adjustment device associated with each laser beam head 10 and / or with each group 21, 22 of laser beam heads. In this way, it is possible to act either individually on each head 10, or simultaneously on a group 21, 22 of laser beam heads 10.
- a group 21, 22 can be composed of two laser beam heads 10 or more.
- a group 21 of laser beam heads 10 can be defined to machine an area 23 of determined width of the surface 5 to be machined.
- two juxtaposed laser beam heads 10 are offset axially from the rail 2 so that side-by-side and simultaneous machining of two grooves 15 does not take place.
- this axial offset of the laser beam heads 10 is found between those making up a group 21, 22 or else between two heads of two adjacent groups. If the groups 21, 22 of laser beam heads 10 can be themselves immediately juxtaposed, as long as a laser beam head 10 of a group 21 does not act, for the machining of a groove 15, of immediately adjacent to the laser beam head 10 of another group 22, these groups 21, 22 can themselves be offset axially in pairs.
- the adjustment means may include indexing means 24 on the rail 2.
- indexing means 24 mechanical and / or electrical, are defined to transmit by means of adjustments, either directly or through the one control unit 19, information for the positional adjustment of the laser beam heads 10 by said adjustment means.
- this invention makes it possible to ensure the reprofiling of the rail at a lower production cost, a reduced risk of fire, reduced dust and simplified and less frequent maintenance.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Plasma & Fusion (AREA)
- Machines For Laying And Maintaining Railways (AREA)
- Laser Beam Processing (AREA)
Abstract
Method for reprofiling rails (2) of railroads, consisting in machining a surface (5) of this rail that is intended to come into contact with the wheels of a railroad vehicle, this machining being done by means of laser beams (10) by moving, at a controlled speed axially with respect to the rail and at a given distance with respect to said rail surface that is to be machined, a given number of heads having laser beams extending transversely with respect to the rail in order to cover said surface that is to be machined; device for implementing this method and a rail vehicle equipped with at least one such reprofiling device.
Description
PROCEDE, DISPOSITIF ET VEHICULE FERROVIAIRE DE REPROFILAGE DE RAIL DE VOIES FERREES METHOD, DEVICE AND RAILWAY VEHICLE FOR RE-TRINKING RAIL TRACKS
L'invention concerne un procédé de reprofilage de rails de voies ferrées, un dispositif de reprofilage pour la mise en œuvre de ce procédé et un véhicule ferroviaire équipé au moins d'un tel dispositif de reprofilage. The invention relates to a method for reprofiling railway tracks, a reprofiling device for implementing this method and a rail vehicle equipped with at least one such reprofiling device.
La présente invention concerne le domaine du reprofilage de rails de voies ferrées, qu'il s'agisse de lignes de chemins de fer traditionnelles ou à grande vitesse, de lignes de métros ou de tramways ou de chemins de fer spécifiques, tels que ceux que l'on retrouve sur les sites industriels, d'exploitation de minerais, de ports aéronautiques ou portuaires, etc... The present invention relates to the field of the reprofiling of rail tracks, whether it is traditional or high-speed railway lines, metro or tram lines or specific railways, such as those that we find it on industrial sites, mineral exploitation, aeronautical or port ports, etc ...
Il est d'ores et déjà d'usage d'assurer un reprofilage des rails de voies ferrées notamment pour limiter les nuisances et impacts engendrés par un rail mal profilé. Ce reprofilage peut intervenir de manière curative, préventive ou cyclique. It is already customary to reprofile the rails of railways, in particular to limit the nuisances and impacts caused by a poorly profiled rail. This reprofiling can take place in a curative, preventive or cyclical manner.
En effet, il a été relevé qu'au passage successif des trains, métros, tramways ou tout autre véhicule amené à circuler sur ces voies, la surface de roulement des rails, à savoir la surface en contact avec lesdits véhicules, peut être marquée par différents impacts, par exemple de ballasts, en plus du matage qui s'en suit et de ses possibles conséquences, comme la formation d'ondulations longitudinales ou un effet d'écaillage, encore dénommé « head check », voire de fissurage. Indeed, it has been noted that at the successive passage of trains, metros, trams or any other vehicle required to circulate on these tracks, the running surface of the rails, namely the surface in contact with said vehicles, may be marked by various impacts, for example from ballasts, in addition to the matting that follows and its possible consequences, such as the formation of longitudinal undulations or a chipping effect, also called “head check”, or even cracking.
Ces dommages causés aux rails, s'ils ne sont pas corrigés rapidement ou traités de manière préventive et/ou cyclique ont tendance à s'aggraver au point de pouvoir représenter un danger pour les utilisateurs de ces voies ferrées. This damage to the rails, if they are not corrected quickly or treated in a preventive and / or cyclical manner, tend to worsen to the point of being able to represent a danger for the users of these railways.
Ces différentes dégradations sont, en effet, source de vibration et ont pour conséquence, non seulement d'augmenter l'effet de fatigue et de vieillissement du rail, mais aussi d'endommager les voies elles-mêmes, en particulier les traverses, les fixations des rails sur ces dernières et les ballastes. Ces vibrations sont aussi dommageables pour les infrastructures alentours.
De plus, le mauvais état de surface des rails peut s'accompagner de nuisances sonores au passage des trains, un phénomène auquel les exploitants des lignes de chemin de fer, tramway, métro ou autre sont contraints de limiter l'importance, grâce à un entretien régulier des rails. These various degradations are, in fact, a source of vibration and have the consequence, not only of increasing the effect of fatigue and aging of the rail, but also of damaging the tracks themselves, in particular the sleepers, the fasteners. rails on the latter and ballasts. These vibrations are also damaging to the surrounding infrastructure. In addition, the poor surface condition of the rails can be accompanied by noise nuisance when trains pass, a phenomenon to which the operators of railway, tram, metro or other lines are forced to limit the importance, thanks to a regular maintenance of the rails.
Il existe aujourd'hui différentes techniques de reprofilage de ces rails de voies ferrées. Today, there are different techniques for reprofiling these rail tracks.
La solution la plus commune consiste à réaliser un meulage des rails dont un des problèmes est qu'il engendre des particules de métal incandescentes, lesquelles sont régulièrement la cause d'incendies. En effet, 1'accumulation de ces particules de métal incandescentes, notamment sur la structure du véhicule ferroviaire équipé des moyens de reprofilage adaptés, crée des scories incandescentes. Celles-ci, en retombant sur les voies peuvent être sources d'incendies et de dommages directement sur les voies ou sur d'autres pièces mécaniques ou électrotechniques qui les équipent. The most common solution consists in carrying out a grinding of the rails, one of the problems of which is that it generates incandescent metal particles, which are regularly the cause of fires. Indeed, the accumulation of these incandescent metal particles, in particular on the structure of the railway vehicle equipped with suitable reprofiling means, creates incandescent slag. These, by falling on the tracks, can be sources of fires and damage directly on the tracks or on other mechanical or electrotechnical parts which equip them.
En plus des particules incandescentes, les opérations de meulage génèrent de grandes quantités de poussières nécessitant d'équiper les trains de reprofilage de moyens d'aspiration adéquats en aval des outils de meulage. Pour autant, on ne peut éviter le dépôt de poussière et de scorie sur les outillages de reprofilage, ce qui impose des opérations de nettoyage très fréquentes de ceux-ci ainsi que des installations à proximité des voies ferrées. Ainsi, lorsque ce reprofilage intervient dans des tunnels, il peut même être nécessaire d'étendre ce nettoyage aux caténaires sur lesquels se déposent cette poussière. In addition to the incandescent particles, the grinding operations generate large amounts of dust requiring the reprofiling trains to be fitted with suitable suction means downstream of the grinding tools. However, it is not possible to avoid the deposition of dust and slag on the reprofiling tools, which requires very frequent cleaning operations thereof as well as of the installations near the railway tracks. Thus, when this reprofiling takes place in tunnels, it may even be necessary to extend this cleaning to the catenaries on which this dust is deposited.
A noter encore que les véhicules ferroviaires ou trains meuleurs équipés de tels systèmes de meulage sont nécessairement équipés de systèmes anti-incendies pour pallier, autant que faire se peut, au risque important d'incendie encouru en cours d'opérations de reprofilage de rails. De tels systèmes anti- incendies se présentent généralement sous forme de systèmes d'arrosage adapté, permettant un arrosage préventif en amont et/ou en aval du meulage, afin de limiter les démarrages de feux et les détériorations diverses.
Dans tous les cas, cette solution de reprofilage par meulage impose une maintenance quotidienne et fastidieuse des trains meuleurs, non seulement pour le remplacement des meules usées, mais aussi pour procéder à un nettoyage systématique des outils de reprofilage. It should also be noted that railway vehicles or grinding trains equipped with such grinding systems are necessarily equipped with fire-fighting systems to mitigate, as far as possible, the significant risk of fire incurred during rail reprofiling operations. Such fire-fighting systems are generally in the form of suitable sprinkling systems, allowing preventive sprinkling upstream and / or downstream of the grinding, in order to limit the starting of fires and various deteriorations. In all cases, this grinding reprofiling solution requires daily and tedious maintenance of the grinding trains, not only for the replacement of worn grinding wheels, but also for systematic cleaning of the reprofiling tools.
Une seconde solution technique plus récemment mise en œuvre pour assurer le reprofilage des rails de voies ferrées, est celle du fraisage qui permet de remédier à la problématique de production d'étincelles et de fines particules volatiles et par voie de conséquence, à celle des scories incandescentes génératrices d'incendies. A second technical solution more recently implemented to ensure the reprofiling of the rails of railways, is that of milling which makes it possible to remedy the problem of production of sparks and fine volatile particles and consequently, that of slag. incandescent fire generators.
Pour autant, le fraisage produisant des stries sur la surface de roulement reprofilée du rail, stries qui peuvent s'étendre transversalement à l'axe longitudinal de ce rail, une opération de finition peut s'imposer en aval du fraisage. Cette finition consistant généralement en un meulage adapté, elle peut induire une production d'étincelles, de poussières et de scories, même si c'est en moindre quantité qu'avec un train de meulage. Par ailleurs, le fraisage s'effectue au moyen de têtes de fraisage à plaquettes d'usinage multiples dont le profil est adapté à l'opération d'usinage réalisée. Pour cette raison, le choix des outils de fraisage détermine le profil de la surface de roulement du rail après reprofilage, profil appelé profil cible ci-après. However, the milling producing ridges on the reprofiled running surface of the rail, ridges which may extend transversely to the longitudinal axis of this rail, a finishing operation may be required downstream of the milling. This finish generally consisting of a suitable grinding, it can induce a production of sparks, dust and slag, even if it is in less quantity than with a grinding train. Furthermore, the milling is carried out by means of milling heads with multiple machining inserts, the profile of which is adapted to the machining operation carried out. For this reason, the choice of milling tools determines the profile of the running surface of the rail after reprofiling, a profile called the target profile below.
Par conséquent, si l'on souhaite modifier ce profil cible, notamment en fonction de la nature de 1'usure ou de la déformation d'un rail, cela ne peut être obtenu qu'en changeant des outils de fraisage. Il convient donc d'arrêter l'opération de reprofilage pour procéder à ce changement, puis de redémarrer celle-ci pour conférer au rail le nouveau profil cible résultant des outils de fraisage de remplacement. Consequently, if one wishes to modify this target profile, in particular according to the nature of the wear or the deformation of a rail, this can only be obtained by changing milling tools. It is therefore necessary to stop the reprofiling operation to make this change, then to restart it to give the rail the new target profile resulting from the replacement milling tools.
Là encore, des opérations de maintenance s'avèrent quotidiennes et fastidieuses sont nécessaires, en particulier pour le remplacement des multiples plaquettes sur chacune des têtes d'usinage.
C'est dans le cadre d'une première démarche inventive qu'il a été pris en compte la faible profondeur d'enlèvement de matière résultant de ces opérations de reprofilage de rails. Ainsi, lors d'une maintenance préventive, qui est la plus fréquemment mise en œuvre, l'enlèvement de matière est deHere again, maintenance operations prove daily and tedious are necessary, in particular for the replacement of the multiple inserts on each of the machining heads. It is within the framework of a first inventive step that the shallow depth of material removal resulting from these rail reprofiling operations was taken into account. Thus, during preventive maintenance, which is the most frequently implemented, the removal of material is
1'ordre de 0,3 mm environ, alors qu'elle atteint 1, 2 voire 3 mm ou plus lors d'une maintenance curative du rail. The order of about 0.3 mm, while it reaches 1, 2 or even 3 mm or more during curative maintenance of the rail.
C'est dans le cadre d'une seconde démarche inventive que l'on a reconsidéré le type d'outil adapté pour assurer un tel enlèvement de matière sur une surface de 70 mm à 100 mm de large environ, sur la tête du champignon du rail, légèrement davantage du côté intérieur à la voie que du côté extérieur. It is within the framework of a second inventive step that one reconsidered the type of tool adapted to ensure such a removal of material on a surface of 70 mm to 100 mm in width approximately, on the head of the fungus of the rail, slightly more on the inside of the track than on the outside.
C'est ainsi que, selon 1'invention, il a été imaginé de réaliser ce reprofilage par creusement contigu d'une pluralité de sillons à la profondeur souhaitée, ceci au moyen de rayons lasers et plus particulièrement encore, de rayons lasers sous jet d'eau. Thus, according to the invention, it was imagined to carry out this reprofiling by contiguous digging of a plurality of grooves to the desired depth, this by means of laser beams and more particularly still, of laser beams under jet. 'water.
Si un procédé d'usinage par laser classique permet d'obtenir de bons résultats, ces lasers classiques sont cependant générateurs d'étincelles. De plus, ils doivent respecter une distance bien précise par rapport à la surface à usiner en fonction de leur point focal, distance qui doit être maintenue constante pour une certaine profondeur d'usinage, et donc, un enlèvement de matière correspondant à une consigne précise. If a conventional laser machining process makes it possible to obtain good results, these conventional lasers nevertheless generate sparks. In addition, they must respect a very precise distance from the surface to be machined according to their focal point, a distance which must be kept constant for a certain machining depth, and therefore, a material removal corresponding to a precise instruction. .
La solution préférée d'un procédé de reprofilage par rayons lasers avec jet d'eau vient avantageusement remédier à ces inconvénients en répondant de manière préférentielle à 1'objectif visé par 1'invention. Ainsi, 1'invention concerne un procédé de reprofilage de rails de voies ferrées consistant à usiner une surface de ce rail destinée à venir en contact avec les roues d'un véhicule ferroviaire, caractérisé par le fait qu'on réalise cet usinage par rayons lasers en déplaçant, à vitesse contrôlée axialement au rail et à distance déterminée par rapport à ladite surface à usiner du rail, un nombre défini de têtes à rayons lasers
s'étendant transversalement au rail pour couvrir ladite surface à usiner. The preferred solution of a water jet laser beam reprofiling process advantageously overcomes these drawbacks by preferentially meeting the objective of the invention. Thus, the invention relates to a process for reprofiling railway tracks consisting in machining a surface of this rail intended to come into contact with the wheels of a railway vehicle, characterized in that this machining is carried out by laser rays. by moving, at a controlled speed axially to the rail and at a determined distance with respect to said surface to be machined of the rail, a defined number of laser beam heads extending transversely to the rail to cover said surface to be machined.
De manière encore plus avantageuse, on réalise cet usinage au moyen de têtes à rayons laser avec jet d'eau. L'invention concerne encore un dispositif de reprofilage de rails apte à équiper un véhicule ferroviaire, caractérisé en ce qu'il comporte au moins un support comprenant des moyens de fixation et de raccordement, notamment électriques, audit véhicule et équipé d'une pluralité de têtes à rayons lasers configuré pour s'étendre transversalement à un rail à usiner, ledit dispositif comportant encore des moyens de réglage en position dites têtes à rayons lasers. Even more advantageously, this machining is carried out by means of laser beam heads with water jet. The invention also relates to a device for reprofiling rails suitable for equipping a rail vehicle, characterized in that it comprises at least one support comprising means for fixing and connecting, in particular electrical, to said vehicle and equipped with a plurality of laser beam heads configured to extend transversely to a rail to be machined, said device further comprising means for adjusting the position called laser beam heads.
L'invention concerne encore un véhicule ferroviaire équipé d'au moins un tel dispositif de reprofilage. Les avantages essentiels découlant de la présente invention consistent en ce qu'un reprofilage par rayons lasers et plus particulièrement par rayons lasers avec jet d'eau, permet de remédier à l'ensemble des inconvénients résultant des techniques de meulage ou de fraisage existantes. D'autres buts et avantages de la présente invention apparaîtront au cours de la description qui va suivre et qui se rapporte à un exemple de réalisation. The invention also relates to a railway vehicle equipped with at least one such reprofiling device. The essential advantages resulting from the present invention consist in that a reprofiling by laser beams and more particularly by laser beams with water jet, makes it possible to remedy all the drawbacks resulting from existing grinding or milling techniques. Other objects and advantages of the present invention will become apparent from the description which follows and which relates to an exemplary embodiment.
La compréhension de cette description sera facilitée en se référant aux dessins en annexe dans lesquels : - la figure 1 est une représentation schématisée et en coupe d'un rail de voie ferrée, The understanding of this description will be facilitated by referring to the accompanying drawings in which: - Figure 1 is a schematic and sectional representation of a railroad track,
- la figure 2 illustre l'action d'un rayon laser avec jet d'eau en comparaison à celle d'un rayon laser traditionnel se propageant dans l'air ; - La figure 3 est une représentation schématisée deFIG. 2 illustrates the action of a laser beam with a water jet in comparison to that of a traditional laser beam propagating in the air; - Figure 3 is a schematic representation of
1'action d'usinage d'un faisceau laser sur la surface d'un rail à reprofiler, The machining action of a laser beam on the surface of a rail to be reprofiled,
- la figure 4 est une représentation schématisée de 1'action d'une pluralité de lasers d'un dispositif de reprofilage selon l'invention sur la surface d'un rail à reprendre,
- la figure 5 est une illustration schématisée d'un tel dispositif de reprofilage selon 1'invention, FIG. 4 is a diagrammatic representation of the action of a plurality of lasers of a reprofiling device according to the invention on the surface of a rail to be reworked, - Figure 5 is a schematic illustration of such a reprofiling device according to the invention,
- la figure 6 est une illustration d'un véhicule pour voies ferrées équipé d'au moins un dispositif de reprofilage conforme à 1'invention. - Figure 6 is an illustration of a railway vehicle equipped with at least one reprofiling device according to the invention.
La présente invention concerne un procédé et un dispositif 1 pour le reprofilage de rails de voies ferrées. The present invention relates to a method and a device 1 for reprofiling railway tracks.
Comme souhaite l'illustrer la figure 1 des dessins joints en annexe, représentant une vue en coupe d'un rail 2 comportant dans sa partie supérieure 3 une forme de champignon, 1'action de reprofilage consiste à usiner cette partie supérieure 3 sur une surface 5 s'étendant davantage sur le côté intérieur 6 de ce rail 2, orienté vers l'intérieur de la voie, que par rapport au côté 7 extérieur par rapport à cette voie. Si l'on prend comme référentiel une normale verticale N par rapport à cette surface 5 en partie supérieure 3 du rail 2, le reprofilage s'étend sensiblement, du côté intérieur 6, jusqu'à ce que la normale à cette surface 5 forme un angle d'environ -70° et un angle d'environ +15° du côté extérieur 7 par rapport à cette normale verticale N. As shown in Figure 1 of the accompanying drawings, showing a sectional view of a rail 2 having in its upper part 3 a mushroom shape, the reprofiling action consists in machining this upper part 3 on a surface. 5 extending more on the inner side 6 of this rail 2, oriented towards the inside of the track, than relative to the outer side 7 with respect to this track. If we take as a frame of reference a vertical normal N with respect to this surface 5 in the upper part 3 of the rail 2, the reprofiling extends substantially, from the inside 6, until the normal to this surface 5 forms a angle of approximately -70 ° and an angle of approximately + 15 ° on the exterior side 7 with respect to this vertical normal N.
Il convient toutefois de remarquer que le procédé et le dispositif de reprofilage selon 1'invention peuvent être mis en oeuvre pour reprofiler une surface 5 de rail 2 s'étendant plus ou moins au-delà ou en deçà des plages indiquées précédemment. Par conséquent, la présente invention n'est nullement limitée au reprofilage d'une surface spécifique. It should however be noted that the reprofiling method and device according to the invention can be implemented to reprofile a surface 5 of rail 2 extending more or less beyond or below the ranges indicated above. Consequently, the present invention is in no way limited to the reprofiling of a specific surface.
Finalement cette surface 5 à reprofiler du rail 2 est celle venant usuellement en contact des roues des véhicules ferroviaires venant à se déplacer sur ce rail 2. Le procédé de reprofilage selon 1'invention consistant à reprofiler, par enlèvement d'une couche de matière, cette surface 5, se distingue en ce que l'on réalise un usinage par rayons lasers, ceci en déplaçant, à vitesse contrôlée axialement 8 au rail 2 et à distance 9 définie par rapport à ladite surface 5, plusieurs têtes à rayon laser 10 pour couvrir la surface 5 à reprofiler.
De manière plus particulièrement avantageuse à 1'invention, on procède à cet usinage au moyen de têtes à rayon laser 10 sous jet d'eau. Finally, this surface 5 to be reprofiled of the rail 2 is that which usually comes into contact with the wheels of railway vehicles coming to move on this rail 2. The reprofiling process according to the invention consisting in reprofiling, by removing a layer of material, this surface 5 is distinguished in that machining is carried out by laser beams, this by moving, at a controlled speed axially 8 to the rail 2 and at a distance 9 defined with respect to said surface 5, several laser beam heads 10 for cover the surface 5 to be reprofiled. In a manner more particularly advantageous to the invention, this machining is carried out by means of laser beam heads 10 under water jet.
Les avantages découlant de cette technologie consistent en ce qu'au-delà du point focal 11 du rayon laser, l'eau entourant le rayon forme, telle une gaine de réflexion, un guide au faisceau laser évitant sa divergence au-delà de ce point focal 11, comme cela est visible dans la figure 2. The advantages resulting from this technology consist in that beyond the focal point 11 of the laser beam, the water surrounding the beam forms, like a reflection sheath, a guide to the laser beam avoiding its divergence beyond this point. focal 11, as can be seen in figure 2.
Il s'ensuit que si un laser traditionnel présente une zone de travail utile 12 autour du point focal 11 très limitée, cette zone de travail 12 est considérablement étendue pour un laser sous jet d'eau. It follows that if a traditional laser has a useful working area 12 around the focal point 11 very limited, this working area 12 is considerably extended for a laser under water jet.
De plus, il convient encore de rappeler que le point focal 11 d'un laser traditionnel est très près de la buse 13 d'émission de rayons lasers. In addition, it should also be remembered that the focal point 11 of a traditional laser is very close to the nozzle 13 for emitting laser rays.
En somme, 1'usinage au moyen d'une tête à rayon laser classique impose une profondeur d'usinage réduite et le respect d'une distance stricte de la buse 13 de cette tête à rayon laser 10 par rapport à la surface 5 à reprofiler. L'usage d'une tête à rayon laser 10 avec jet d'eau a pour avantage de procurer plus de souplesse dans le cadre de cette opération de reprofi1âge, que ce soit en termes de profondeur d'usinage, de distance d'implantation 9 des têtes à rayon laser 10 par rapport à la surface 5 du rail 2, tout en procurant une qualité d'usinage meilleure. In short, the machining by means of a conventional laser beam head imposes a reduced machining depth and the respect of a strict distance of the nozzle 13 of this laser beam head 10 with respect to the surface 5 to be reprofiled. . The use of a laser beam head 10 with water jet has the advantage of providing more flexibility in the context of this reprofiling operation, whether in terms of machining depth, of implantation distance 9. laser beam heads 10 relative to the surface 5 of rail 2, while providing better machining quality.
En particulier, grâce à un faisceau 14 de rayon laser linéaire et très peu divergent, le laser sous jet d'eau permet de produire, comme visible dans la figure 3, un sillon 15 régulier au niveau de la surface 5 du rail 2. En utilisant une pluralité de têtes à rayon laser 10 sous jet d'eau, il est possible d'obtenir un usinage contrôlé sur toute la largeur de cette surface 5, en juxtaposant des sillons 15 jusqu'à ce qu'on atteigne la largeur d'usinage 16 souhaitée. In particular, thanks to a beam 14 of linear laser beam and very little diverging, the laser under water jet makes it possible to produce, as can be seen in FIG. 3, a regular groove 15 at the level of the surface 5 of the rail 2. In using a plurality of laser beam heads 10 under water jet, it is possible to obtain a controlled machining over the entire width of this surface 5, by juxtaposing grooves 15 until the width of machining 16 desired.
En outre, un avantage significatif d'un tel usinage à rayon laser sous jet d'eau consiste en ce l'eau limite que des particules en fusion enlevées par le rayon laser viennent se redéposer sur la surface 5 du rail 2 en l'altérant. Par
ailleurs, l'eau contribue, au moins en partie, à 1'entrainement vers le sol des particules prélevées, tout en les refroidissant et en limitant la formation de scories. Les risques de détérioration de matériel électrique ou mécanique à proximité du rail 2, mais aussi d'incendie sont, de fait, diminués par cette absence de scories. In addition, a significant advantage of such a water jet laser beam machining consists in the fact that water limits the molten particles removed by the laser beam from being redeposited on the surface 5 of the rail 2, altering it. . Through elsewhere, the water contributes, at least in part, to the entrainment towards the soil of the particles collected, while cooling them and limiting the formation of slag. The risks of deterioration of electrical or mechanical equipment near the rail 2, but also of fire are, in fact, reduced by this absence of slag.
Il convient de noter qu'en limitant significativement la diffusion de particules fines, on réduit de manière toute aussi importante la maintenance des outils de reprofilage. En effet, seul un nettoyage minimum est nécessaire en comparaison aux solutions de l'état de la technique, en particulier au meulage. It should be noted that by significantly limiting the diffusion of fine particles, the maintenance of reprofiling tools is just as significantly reduced. Indeed, only a minimum cleaning is necessary compared to the solutions of the state of the art, in particular to grinding.
L'invention concerne encore un dispositif 1 pour la mise en oeuvre du procédé de reprofilage de rails selon l'invention qui, comme représenté schématiquement dans la figure 6, est apte à équiper un véhicule 17 pour voies ferrées. Ce véhicule 17 peut s'apparenter à un train et peut recevoir plusieurs dispositifs 1 selon 1 invention, en particulier pour le reprofilage de chacun des rails d'une voie. The invention also relates to a device 1 for implementing the method for reprofiling rails according to the invention which, as shown schematically in FIG. 6, is suitable for fitting out a vehicle 17 for railways. This vehicle 17 can be likened to a train and can receive several devices 1 according to the invention, in particular for the reprofiling of each of the rails of a track.
Ainsi, un tel dispositif 1 pour reprofilage de rails 2 conforme à 1'invention comporte un support 18, lequel est équipé avantageusement de moyens de fixation et de raccordement audit véhicule 17. Lesdits moyens de raccordement comportent préférentiellement des moyens de raccordement électrique et/ou par fibre optique des têtes à rayon laser 10, voire, encore, en eau si ces têtes à rayon laser 10 interviennent sous jet d'eau. Thus, such a device 1 for reprofiling rails 2 in accordance with the invention comprises a support 18, which is advantageously equipped with means for fixing and connecting to said vehicle 17. Said connection means preferably comprise electrical connection means and / or by optical fiber laser beam heads 10, or even, in water if these laser beam heads 10 operate under water jet.
Quant aux moyens de raccordement électrique, ils peuvent comprendre des moyens d'alimentation en énergie électrique à destination des têtes à rayon laser 10, voire de moyens de réglage en position de ces dernières, comme cela apparaîtra plus en avant de la description ou encore des moyens de connexion à une unité de commande 19 que comporte le dispositif 1 selon 1'invention. As for the electrical connection means, they may comprise means for supplying electrical energy intended for the laser beam heads 10, or even means for adjusting the position of the latter, as will appear later in the description or further on. means of connection to a control unit 19 that comprises the device 1 according to the invention.
En particulier cette unité de commande 19 peut être déportée et installée dans un poste de commande adapté dans le véhicule 17. In particular, this control unit 19 can be deported and installed in a suitable control station in the vehicle 17.
De manière particulière à l'invention, le dispositif de reprofilage 1 comporte une pluralité de têtes à rayon laser 10
configurées pour s'étendre transversalement à un rail 2 à usiner, sachant que ce dispositif 1 comporte encore des moyens de réglage en position desdites têtes à rayon laser 10 pour ajuster leur position par rapport à ce rail 2 à usiner, plus particulièrement la surface 5 de ce rail 2. In a particular way to the invention, the reprofiling device 1 comprises a plurality of laser beam heads 10 configured to extend transversely to a rail 2 to be machined, knowing that this device 1 also comprises means for adjusting the position of said laser beam heads 10 in order to adjust their position with respect to this rail 2 to be machined, more particularly the surface 5 of this rail 2.
Selon 1'invention, ces moyens de réglage peuvent être définis par un dispositif de réglage associé à chaque tête à rayon laser 10 et/ou à chaque groupe 21, 22 de têtes à rayon laser. De la sorte il est possible d'agir soit individuellement sur chaque tête 10, soit simultanément sur un groupe 21, 22 de têtes à rayon laser 10. Ainsi un groupe 21, 22 peut être composé de deux têtes à rayon laser 10 ou plus. According to the invention, these adjustment means can be defined by an adjustment device associated with each laser beam head 10 and / or with each group 21, 22 of laser beam heads. In this way, it is possible to act either individually on each head 10, or simultaneously on a group 21, 22 of laser beam heads 10. Thus a group 21, 22 can be composed of two laser beam heads 10 or more.
En particulier, un groupe 21 de têtes à rayon laser 10 peut être défini pour usiner une zone 23 de largeur déterminée de la surface 5 à usiner. In particular, a group 21 of laser beam heads 10 can be defined to machine an area 23 of determined width of the surface 5 to be machined.
Avantageusement, deux têtes à rayon laser 10 juxtaposées sont décalées axialement au rail 2 pour que n'intervienne pas un usinage côte à côte et simultanément de deux sillons 15. Advantageously, two juxtaposed laser beam heads 10 are offset axially from the rail 2 so that side-by-side and simultaneous machining of two grooves 15 does not take place.
Ainsi, 1'usinage d'un tel sillon 15 n'est pas immédiatement influencé par 1'usinage d'un autre sillon 15 réalisé juste à côté. Thus, the machining of such a groove 15 is not immediately influenced by the machining of another groove 15 made next to it.
Préférentiellement ce décalage axial des têtes à rayon laser 10 se retrouve entre celles composant un groupe 21, 22 ou encore entre deux têtes de deux groupes adjacents. Si les groupes 21, 22 de têtes à rayon laser 10 peuvent être, eux, immédiatement juxtaposés, tant qu'une tête à rayon laser 10 d'un groupe 21 n'agit pas, pour l'usinage d'un sillon 15, de manière immédiatement contigüe à la tête à rayon laser 10 d'un autre groupe 22, ces groupes 21, 22 peuvent eux-mêmes être décalés axialement deux à deux. Preferably, this axial offset of the laser beam heads 10 is found between those making up a group 21, 22 or else between two heads of two adjacent groups. If the groups 21, 22 of laser beam heads 10 can be themselves immediately juxtaposed, as long as a laser beam head 10 of a group 21 does not act, for the machining of a groove 15, of immediately adjacent to the laser beam head 10 of another group 22, these groups 21, 22 can themselves be offset axially in pairs.
A noter encore que les moyens de réglage peuvent comporter des moyens d'indexation 24 sur le rail 2. De tels moyens d'indexation 24, mécaniques et/ou électriques sont définis pour transmettre au moyen de réglages, soit directement, soit au travers de l'une unité de commande 19, une information pour 1'ajustement en position des têtes à rayon laser 10 par lesdits moyens de réglage.
Comme déjà exposé plus haut, les avantages découlant de la présente invention sont nombreux. En particulier, cette invention permet d'assurer le reprofilage de rail pour un coût de revient moindre, un risque d'incendie diminué, des poussières réduites et une maintenance simplifiée et moins fréquente.
It should also be noted that the adjustment means may include indexing means 24 on the rail 2. Such indexing means 24, mechanical and / or electrical, are defined to transmit by means of adjustments, either directly or through the one control unit 19, information for the positional adjustment of the laser beam heads 10 by said adjustment means. As already explained above, the advantages resulting from the present invention are numerous. In particular, this invention makes it possible to ensure the reprofiling of the rail at a lower production cost, a reduced risk of fire, reduced dust and simplified and less frequent maintenance.
Claims
1. Procédé de reprofilage de rails 2 de voies ferrées consistant à usiner une surface 5 de ce rail 2 destinée à venir en contact avec les roues d'un véhicule ferroviaire, caractérisé par le fait qu'on réalise cet usinage par rayons lasers en déplaçant, à vitesse contrôlée axialement au rail 2 et à distance déterminée par rapport à ladite surface 5 à usiner du rail 2, un nombre défini de têtes à rayons lasers 10 s'étendant transversalement au rail 2 pour couvrir ladite surface 5 à usiner. 1. A method of reprofiling rails 2 of railway tracks consisting in machining a surface 5 of this rail 2 intended to come into contact with the wheels of a railway vehicle, characterized in that this machining is carried out by laser beams by moving , at a speed controlled axially to the rail 2 and at a determined distance with respect to said surface 5 to be machined of the rail 2, a defined number of laser beam heads 10 extending transversely to the rail 2 in order to cover said surface 5 to be machined.
2. Procédé selon la revendication 1, caractérisé en ce qu'on réalise cet usinage au moyen de têtes à rayons laser avec jet d'eau. 2. Method according to claim 1, characterized in that this machining is carried out by means of laser beam heads with water jet.
3. Dispositif de reprofilage de rails apte à équiper un véhicule ferroviaire 17 pour la mise en oeuvre du procédé selon les revendications précédentes, caractérisé en ce qu'il comporte au moins un support 18 comprenant des moyens de fixation et de raccordement, notamment électriques, audit véhicule 17 et équipée d'une pluralité de têtes à rayons lasers 10 configurée pour s'étendre transversalement à un rail 2 à usiner, ledit dispositif 1 comportant encore des moyens de réglage en position desdites têtes à rayons lasers 10. 3. Device for reprofiling rails suitable for equipping a rail vehicle 17 for implementing the method according to the preceding claims, characterized in that it comprises at least one support 18 comprising fixing and connection means, in particular electrical, said vehicle 17 and equipped with a plurality of laser beam heads 10 configured to extend transversely to a rail 2 to be machined, said device 1 further comprising means for adjusting the position of said laser beam heads 10.
4. Dispositif selon la revendication 3, caractérisé en ce qu'il comporte des têtes à rayons laser, dont toutes ou partie sont avec jet d'eau 4. Device according to claim 3, characterized in that it comprises laser beam heads, all or part of which are with water jet
5. Dispositif selon la revendication 4, caractérisé en ce lesdits moyens de raccordement comportent des moyens de raccordement électrique et des moyens de raccordement à une alimentation en eau pour alimenter les têtes à rayon laser sous jet d'eau 10. 5. Device according to claim 4, characterized in that said connection means comprise electrical connection means and connection means to a water supply for supplying the laser beam heads under water jet 10.
6. Dispositif selon l'une des revendications 3 à 5, caractérisé en ce que les moyens de raccordement électrique comprennent des moyens d'alimentation en énergie électrique à destination des têtes à rayon laser 10 et de moyens de réglage en positon de ces dernières.
6. Device according to one of claims 3 to 5, characterized in that the electrical connection means comprise means for supplying electrical energy to the laser beam heads 10 and means for adjusting the position of the latter.
7. Dispositif selon l'une des revendications 3 à 6, caractérisé en ce qu'il comporte une unité de commande 19, notamment installée dans un poste de commande adapté dans le véhicule 17. 7. Device according to one of claims 3 to 6, characterized in that it comprises a control unit 19, in particular installed in a suitable control station in the vehicle 17.
8. Dispositif selon l'une des revendications 3 à 7, caractérisé en ce que les moyens de réglage comprennent un dispositif de réglage associé à chaque tête à rayon laser 10 et/ou à chaque groupe 21, 22 comprenant au moins deux têtes à rayon laser 10 et défini pour usiner une zone 23 de largeur déterminée de la surface 5 à usiner. 8. Device according to one of claims 3 to 7, characterized in that the adjustment means comprise an adjustment device associated with each laser beam head 10 and / or with each group 21, 22 comprising at least two beam heads. laser 10 and defined to machine an area 23 of determined width of the surface 5 to be machined.
9. Dispositif selon l'une des revendications 3 à 8, caractérisé en ce que les moyens de réglage comportent des moyens d'indexation mécaniques et/ou électriques 24 pour transmettre aux moyens de réglages, soit directement, soit au travers de l'une unité de commande 19, une information pour 1'ajustement en position des têtes à rayon laser 10 par lesdits moyens de réglage. 9. Device according to one of claims 3 to 8, characterized in that the adjustment means comprise mechanical and / or electrical indexing means 24 for transmitting to the adjustment means, either directly or through one control unit 19, information for the positional adjustment of the laser beam heads 10 by said adjustment means.
10.Dispositif selon l'une des revendications 3 à 9, caractérisé en ce qu'une tête à rayon laser 10 est décalée axialement au rail 2 par rapport à une autre tête à rayon laser 10 juxtaposée. 10.Device according to one of claims 3 to 9, characterized in that a laser beam head 10 is offset axially to the rail 2 relative to another laser beam head 10 juxtaposed.
11.Véhicule ferroviaire caractérisé en ce qu'il est équipé d'au moins un dispositif de reprofilage selon l'une quelconque des revendications 3 à 10.
11. Rail vehicle characterized in that it is equipped with at least one reprofiling device according to any one of claims 3 to 10.
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CH01411/19 | 2019-11-08 | ||
CH01411/19A CH716776A8 (en) | 2019-11-08 | 2019-11-08 | Method, device and railway vehicle for reprofiling railway tracks. |
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WO2021089668A1 true WO2021089668A1 (en) | 2021-05-14 |
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PCT/EP2020/081049 WO2021089668A1 (en) | 2019-11-08 | 2020-11-05 | Method, device and rail vehicle for reprofiling railroad rail |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0266167A1 (en) * | 1986-10-31 | 1988-05-04 | Herb Joseph John Seguin | Insitu energy beam processing of railroad track and equipment for increasing service lifetime |
DE202005011968U1 (en) * | 2005-07-27 | 2006-01-05 | Schörling-Brock GmbH | Irregularities e.g. chatter marks, removal device for running surfaces of rails, has portable laser system mounted on operating carriage for removal of material and smoothening of running surfaces of rails |
CN101798789A (en) * | 2010-02-10 | 2010-08-11 | 华中科技大学 | Mobile-type laser processing device for on-line processing surface of steel rail |
US20170233954A1 (en) * | 2016-02-12 | 2017-08-17 | Holland, L.P. | Robotically-Controlled Laser Cladding Process for Repair of Worn and/or Damaged Railway Structures |
US20190161918A1 (en) * | 2017-03-22 | 2019-05-30 | Wuhan NRD Laser Engineering Co., Ltd. | Onsite steel rail laser processing engineering vehicle |
-
2019
- 2019-11-08 CH CH01411/19A patent/CH716776A8/en not_active Application Discontinuation
-
2020
- 2020-11-05 WO PCT/EP2020/081049 patent/WO2021089668A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0266167A1 (en) * | 1986-10-31 | 1988-05-04 | Herb Joseph John Seguin | Insitu energy beam processing of railroad track and equipment for increasing service lifetime |
DE202005011968U1 (en) * | 2005-07-27 | 2006-01-05 | Schörling-Brock GmbH | Irregularities e.g. chatter marks, removal device for running surfaces of rails, has portable laser system mounted on operating carriage for removal of material and smoothening of running surfaces of rails |
CN101798789A (en) * | 2010-02-10 | 2010-08-11 | 华中科技大学 | Mobile-type laser processing device for on-line processing surface of steel rail |
US20170233954A1 (en) * | 2016-02-12 | 2017-08-17 | Holland, L.P. | Robotically-Controlled Laser Cladding Process for Repair of Worn and/or Damaged Railway Structures |
US20190161918A1 (en) * | 2017-03-22 | 2019-05-30 | Wuhan NRD Laser Engineering Co., Ltd. | Onsite steel rail laser processing engineering vehicle |
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