EP2519693B1 - Rail profile grinder - Google Patents

Rail profile grinder Download PDF

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Publication number
EP2519693B1
EP2519693B1 EP10809292.5A EP10809292A EP2519693B1 EP 2519693 B1 EP2519693 B1 EP 2519693B1 EP 10809292 A EP10809292 A EP 10809292A EP 2519693 B1 EP2519693 B1 EP 2519693B1
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EP
European Patent Office
Prior art keywords
grinding
head
machine
movement
track
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.)
Not-in-force
Application number
EP10809292.5A
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German (de)
French (fr)
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EP2519693A1 (en
Inventor
Jean-Marie Bressan
Gilles Noel
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.)
Societe des Anciens Etablissements Lucien Geismar SAS
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Societe des Anciens Etablissements Lucien Geismar SAS
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Publication of EP2519693A1 publication Critical patent/EP2519693A1/en
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Publication of EP2519693B1 publication Critical patent/EP2519693B1/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/004—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding rails, T, I, H or other similar profiles

Definitions

  • the invention relates to rail grinding equipment, and more particularly to an automated rail profile grinding equipment, for new works and maintenance on rails of similar railways and tracks, particularly in the field of rail grinding. rail transport.
  • a rail profile grinder is a device designed to grind the rail head, mainly after welding, in order to give the weld area a profile identical to the current profile of the rail.
  • light machines mainly used on track, which usually comprise a chassis carrying an abrasive tool which is rotated by a motor (see FR 2 661 698 A1 or JP 7 207603 A ).
  • the abrasive tool is driven by a rise / fall movement, also called a diving movement, allowing it to move closer or further away from the rail.
  • the frame of the machine and the mounted wheel can be inclined at will on either side of the rail, to allow the grinding of the tread of the rail, the flank of the mushroom of the inner rail to the track, and connecting radii between the tread and each side of the mushroom.
  • the frame is provided with rolling means consisting of a set of copying rollers to allow the alternating movements of the machine in advance and back.
  • the rail profile grinders currently used in track are generally essentially manual machines.
  • the operator must move the grinder rolling along the rail, alternately by pushing and pulling it, control the dive movement of the grinding wheel.
  • the present invention aims to provide equipment that overcomes all the disadvantages of the state of the art, which has just been described.
  • the on-track solder grinding machine comprises a servocontrol of the positioning of the grinding gate in said first direction perpendicular to the beam by means of a radial displacement cylinder of the grinding gate fed by a servo-distributor in association with a sensor. position.
  • the beam comprises at least one hearty blade brought and maintained in contact on a point of said mushroom for each rotational movement of the beam so as to maintain the same reference during the sweeping movement of the grinding wheel.
  • the beam comprises a sound sensor for detecting a docking of the wheel on the rail head.
  • the rail-based grinding machine comprises a longitudinal displacement cylinder of the grinding wheel carrier associated with an absolute position sensor for automating the sweeping motion of the grinding wheel carrier with variable stroke lengths.
  • the beam comprises a hydraulic motor driving the rotation of the wheel, and a pressure sensor mounted on the hydraulic motor power to measure a force provided by the hydraulic motor.
  • the pressure sensor signal is then used to manage the position of the mill gate to compensate for wheel wear and to detect effective grinding of the weld on the rail head.
  • a wheel release movement is operated automatically at the end of each scan stroke to connect the ground surfaces with the raw portion of the rail head.
  • the track welding grinding machine comprises two curved supports and the beam comprises one or more straight rollers at one end for rolling on a straight crown sector of one of the curved supports and one or more rollers V at the other ends for rolling on a V-shaped crown sector on the other of the curved supports so as to provide a reduced clearance clearance of the beam moving on the curved supports.
  • the welding grinding machine on the track comprises an automation controller Programmable controller arranged to control and control each movement of the beam and the mill gate.
  • the programmable automation controller comprises a memory storing data obtained from an associated portable straightness measuring electronic rule and an electronic processing device programmed to define positions and lengths of the sweeps according to the applicable tolerance, in order to control a complete progress of the grinding cycle in automatic mode, without human intervention.
  • the unit of grinding of welds in track which is represented on figures 1 and 2 , makes it possible to perform a finishing grinding of the rail welds by eliminating the weld bead on the useful profile of the poppet 13.
  • the grinding takes place on the rolling surface 40, on the guide spokes 41 and on the sidewall 42 inside the track welded rails.
  • the grinding is carried out by alternating longitudinal passes over a maximum length of substantially 600 mm centered or not on the welding, combined with a rotational movement around the rail head.
  • a plug wheel 32 is mounted at the end of a spindle housed in a grinding aluminum body 23 and driven in rotation by a hydraulic motor 11. This spindle is inclined at a slight angle of the order of 1 ° by relative to the vertical axis to promote cutting of the grinding wheel.
  • the grinding wheel carrier 23 Four shoes 21 with prestressed rollers are fixed on the grinding wheel holder 23.
  • the skids 21 are mounted on two guide rails 22 integral with a support bracket 24.
  • the relative positioning of the grinding wheel carrier 23 with respect to the bracket 24, defining the depth of pass, is provided by a hydraulic cylinder 33.
  • the hydraulic jack 33 is fed by a servo-distributor 15 for controlling the direction and the speed of displacement.
  • a programmable real-time automation controller 31 allows the position of the wheel to be servo-controlled with a resolution of 0.05 mm.
  • the real-time programmable automation controller 31 which receives the signal supplied by a sound sensor 16, controls the stopping of the movement as soon as the predetermined threshold corresponding to the docking of the wheel on the mushroom 13 of the rail is reached.
  • an operator controls the up / down movement of the grinding wheel in steps of 0.05mm through a manipulator on the control box 50.
  • the signal of a pressure sensor 65 mounted on the feed of the hydraulic wheel rotation motor 11 is used by the real-time programmable automation controller to detect the actual grinding.
  • a low pressure is sufficient to turn it.
  • the pressure rises considerably when the wheel in contact with the rail is braked by the abrasion work.
  • the pressure variations are gradually reduced to remain contained at the end of grinding in a range of values between two thresholds corresponding to a touch of the grinding wheel on the rail. A pressure detection remaining between two predefined thresholds then makes it possible to control a rotation of the beam.
  • the pressure sensor 65 is also used by the real-time programmable automation controller to automatically control the positioning of the grinding wheel in steps of 0.05mm depending on the pressure level, thus making it possible to compensate for the wear of the grinding wheel and avoid excessive reduction of the rotation speed.
  • the support bracket 24 is fixed on four prestressed roller carriages 25 mounted on two guide rails 26 integral with a grinding beam 12.
  • the reciprocating movements parallel to the track, of adjustable stroke, are made automatic by the combination of a hydraulic cylinder 17 with an absolute cable position sensor 19 mounted on the grinding beam 12.
  • an operator defines the grinding length on either side of the weld by means of potentiometers located on the control box 50.
  • the position and the grinding length are managed automatically by the real-time programmable automation controller 31.
  • This automatic management is made possible by the use of a portable electronic measuring rule.
  • the rule Prior to the installation of the unit 1 on the track, measurements of the straightness of the rail on the mushroom 13 to the right of the welding.
  • the data is stored in an electronic device that allows to define out-of-tolerance areas according to the applicable standards.
  • the rule comprises an electronic device which is for example a personal digital assistant (PDA acronym for personal digital assistant in English) which communicates with the processor of the rule by a connection compliant with the IEEE 802.15 standard.
  • the electronic device is then connected to the controller 31, for example by means of a serial transmission bus (USB acronym for Universal Serial Bus in English), to communicate the applicable grinding parameters.
  • USB Universal Serial Bus
  • the rise of the wheel is automatic at the end of each race to connect the ground surfaces with the raw part of the rail.
  • the hydraulic jack 33 releases the grinding wheel 23 by approximately 0.5 mm and returns it at the beginning of the reverse movement, these values can be parameterized.
  • this additional function is activated or not by the operator from the control box 50.
  • this function is automatically activated if a recessed weld has been detected during the definition phase of the out-of-box zones. tolerances.
  • the grinding beam 12 is provided with guides at each end, each consisting of a prestressed roller shoe 27 mounted on a guide rail.
  • Two hydraulic cylinders 18 mounted on each of the two vertical arms give the downward movement of the beam 12 to the rail 28 from the initial position of disengagement.
  • the contact with the mushroom 13 of the rail 28 is established by means of two copious blades 52 integral with the beam and 1 m apart.
  • the copious blades make it possible to place and keep in reference the beam 12 during its rotation around the mushroom 13 of the rail 28 by means of a regulation maintaining a constant pressure in the jacks 18.
  • the grinding beam 12 rotates around the head 13 of the rail 28 via an on-board mechanism consisting of a hydraulic geared motor 20 and a transmission shaft equipped with two gears 30.
  • the assembly described above is stiffened by a cross member 53 with respect to which the upward movement of the beam 12 is carried out.
  • Each of the gears 30 rotates the beam 12 and here also crosses 53 through the beam 12.
  • the figure 1 only the curved support of the right is visible, the left curved support being masked by a wall of the main frame 9.
  • Precision guidance in rotation is provided by eight rollers 8 and 58 integral with the beam 12, rolling on two sectors of 7.
  • One of the sides of the beam is equipped with guide rollers 58 and V-groove crown sector while the other side is equipped with guide rollers 8 and straight crown sector to provide clearance guidance. reduced without being hyperstatic.
  • Two limit switches 6 detect the extreme angular positions and a third limit switch indicates the initial vertical position, the extreme contacts cutting the rotation control of the beam.
  • the angular grinding range extends from 90 ° to the inside of the track at 20 ° outwards.
  • the two curved supports 10 integral with the main frame 9 describe an arc that covers the mushroom 13 perpendicular to the 110 ° track.
  • an operator controls the direction and speed of rotation of the grinding beam 12 via a manipulator and a potentiometer located on the control box 50.
  • the hydraulic motor 20 is equipped with an integrated speed sensor enabling the real-time programmable automation controller to manage the angular indexing of the grinding beam.
  • the integrated speed sensor is for example of the pulse generator type.
  • a counter in the controller 31 then makes it possible to measure the displacement angle by summation of the sampled pulses.
  • the main frame 9, made of mechanically welded sections, supports the sectors of crowns as well as the tensioned chains allowing the rotation of the beam.
  • the chassis 9, in the working position, rests on the two rails 28, 29 so as to compensate for any cant of the track.
  • the tread is used as a reference for the 0 ° position of the beam 12.
  • Two horizontal cylinders 79, not visible on the figures 1 and 2 as located under the unit 1, provide shifting and maintaining reference frame on the inner side of the rail 28 treated.
  • Four rollers with guide cheeks, placed at the ends and actuated by jacks 85, not shown on the figures 1 and 2 allow the unit 1 to be lifted out of the lower jig of the lane and moved on the lane in compatibility with the circulation jig.
  • the unit 1 is equipped with an adaptation yoke 55 in the upper part of the chassis allowing a mechanical connection with the point of attachment of the carrier vehicle.
  • the carrier vehicle provides a handling function when setting up unit 1 track, a reversing function of the unit to work on the opposite rail queue and a towing function on the track.
  • the energy required to operate the unit is provided by the carrier vehicle.
  • the hydraulic and electrical connection is made at the clevis 55 of the unit by quick connections.
  • the electrical energy is supplied with a voltage of 24 V and the hydraulic energy is supplied with a flow rate of 105 l / min at a pressure of 160 bar.
  • the unit is provided with a partially transparent hood 51 with smoke extraction system, not shown, effectively protecting the operator from grinding projections while providing optimum visibility on the grinding area.
  • a dust suction system installed on the carrier vehicle and connected by flexible duct to the cowling of the grinding unit, ensures effective filtration of the dust generated.
  • a pressure limiter 62 associated with a solenoid valve 61 of pressure validation secures the operation of the equipment.
  • the hydraulic motor 11 for driving the rotating grinding wheel receives a flow of fluid regulated by a solenoid valve 63 and a flow regulator 64.
  • a fluid sample represented in dashed lines, allows an auto-lubrication of the grinding wheel carrier 23.
  • the hydraulic cylinder 17 sweeping the door mills along the beam is controlled by a solenoid valve 66 and a pressure reducer 67.
  • a hydraulic Graetz bridge 69 associated with a flow regulator 68 ensures a constant speed of movement grinding gate in one direction as in the other, regardless of the section of the rod which varies differently the volume of the chamber upstream and downstream of the piston of the cylinder 17.
  • a solenoid valve 70 makes it possible to control a safety brake 56 to block the hydraulic geared motor 20 in the absence of rotation control of the beam or in the event of a fault.
  • Two balancing valves 60 guarantee a smooth movement of the beam.
  • the jacks 18 for lowering the beam are supplied with fluid by a two-position solenoid valve 73 associated with a pressure reduction 74, the current-controlled position corresponding to the descent of the beam and the position with no current corresponding to the ascent. of the beam.
  • a 75m flow regulator short-circuited by a non-return valve during the descent of the beam, ensures a constant flow and therefore a constant rate of rise of the beam.
  • a flow regulator 75d, short-circuited by a non-return valve during the ascent of the beam ensures a constant flow rate and therefore a constant rate of descent of the beam.
  • a safety valve 90 prevents the uncontrolled descent of the beam.
  • the horizontal clamping and alignment cylinders 79 of the frame are supplied with fluid by a solenoid valve 76 associated with a flow regulator 77 and a pressure reducer 78.
  • a three-position solenoid valve 80 controls the raising, lowering or holding in position of the chassis in combination with flow regulators 82 and a pressure reducer 81.
  • a safety valve 84 prevents uncontrolled lowering of the chassis.
  • the ram 33 for lowering the mill gate is fed by the proportional servo-distributor 15 associated with the position sensor 35 to move the grinding wheel holder 23 in the direction perpendicular to the beam 12 so as to bring the wheel 32 mounted on a end of the grinding wheel 23 of the center of the arc described by the curved supports 10.
  • the organization chart of the figure 3 shows the essential steps of a grinding method according to the invention and executed by the real-time programmable automation controller 31.
  • the flowchart can be through a semi-automatic cycle or an automatic cycle.
  • the receptions of the transitions and the actions of the steps are identical in semi-automatic mode and in automatic mode.
  • the programmable real-time automation controller 31 is by default in a waiting step 101.
  • a transition 201 to a step 102 is crossed when a set of initial conditions is realized and when a semi-automatic or automatic cycle is activated.
  • the semi-automatic or automatic activation is memorized until the end of the cycle unless a voluntary change from one mode of operation to another during the cycle.
  • the set of initial conditions comprises a state of the unit hydraulically and electrically connected to the carrier, a state of the unit positioned at the weld, a state of the grinding beam in a vertical position and in a raised position, a state of the wheel in the high and centered position, a state of the unit descended on the track and clamped by reference.
  • step 102 an electrical signal is sent to the solenoid valve 63 to rotate the wheel and an electrical signal is sent to the solenoid valve 73 to lower the beam.
  • a transition 202 to a step 103 is passed after a timeout has elapsed.
  • step 103 an electrical signal is sent to the proportional distributor 15 to lower the mill gate.
  • a transition 203 to a step 104 is reached after detection of contact of the wheel with the mushroom by the sound sensor 16.
  • step 104 the electrical signal sent to the proportional distributor 15 is set to a value which stops the descent of the mill carrier.
  • step 104 From step 104, a transition 204 to a step 105, a step 107 and a step 110 is systematically completed.
  • step 105 an electrical signal is sent on a first coil of solenoid valve 66 to sweep the grinding door to the left.
  • a transition 205 to a step 106 is passed after detection of extreme left position by the absolute position sensor cable 19.
  • step 106 an electrical signal is sent on a second coil of solenoid valve 66 to sweep the grinding gate to the right.
  • step 106 From step 106, a loopback transition 206 on step 105 is crossed after detection of extreme right position by the absolute cable position sensor 19.
  • the far left position and far right position values can be changed at any time by the human operator to adjust a grinding amplitude.
  • the human operator can also select and deselect at any time a recessed grinding function which consists of synchronizing with step 107, a rise of the grinding wheel before reaching each extreme position and a return to the return.
  • the far left position and far right position values are calculated according to predefined grinding amplitudes that result from preliminary measurements.
  • the results of Preliminary measurements can also trigger and trigger the recessed grinding function at any time.
  • Step 107 is a waiting step.
  • a transition 207 to a step 108 is passed following a request for movement of the wheel gate up or down by the human operator in semi-automatic mode or following a command of movement in automatic mode of the wheel gate up or down by different functions.
  • the hollow grinding function controls a gradual raising of the grinding wheel when the absolute cable position sensor 19 gives a value that changes from a predefined threshold to the extreme position and then orders a progressive lowering of the grinding wheel when the absolute position sensor at cable 19 gives a value that changes from the extreme position to the predefined threshold.
  • a grinding function which receives as input the measurement of the pressure sensor 65, controls a descent which has the effect of increasing the driving pressure of the hydraulic motor 11 at a constant speed to overcome forces of increasing abrasion or controlling a rise which has the effect of reducing the driving pressure of the hydraulic motor 11 at a constant speed to overcome decreasing abrasion forces so as to maintain the driving pressure in a corresponding range of values to optimal abrasion efforts.
  • the grinding function that has just been described, has the merit of automatically correcting the wear of the grinding wheel.
  • step 108 an electrical signal is sent on the servo-distributor 15 to move the mill carrier over a 0.05 mm stroke.
  • a transition 208 to a step 109 is passed after detection of end of movement controlled by the synchronous serial interface incremental sensor (SSI Synchronous Serial Interface in English).
  • step 109 the electrical signal sent on the servo-distributor 15 is set to a value which stops the downward movement of the mill carrier.
  • step 109 a loopback transition 209 on step 107 is systematically crossed.
  • Step 110 is a waiting step.
  • a transition transition 210 to a step 111 is crossed, provided that no limit switch is activated, following a request for rotation of the beam forward or backward by the human operator in semi-automatic mode or following a command to rotate the beam forward or backward by different functions.
  • step 111 an electric signal is sent on one or other of the solenoid valve coils 71 depending on whether the rotation is required forwards or backwards. An electrical signal is also sent on the coil of the solenoid valve 70 to release the brake 56.
  • a transition 211 to a step 112 is crossed after end-of-travel detection or release of the rotation request in semi-automatic mode or position reached in automatic mode.
  • step 112 the electrical signals sent to the solenoid valves 70 and 71 are cut off to immobilize the beam.
  • step 112 a loopback transition 212 on step 110 is systematically crossed.
  • a transition 305, 306, 307 and 310 to a step 113 is crossed if an end of cycle is requested in semi-automatic mode or controlled in automatic mode.
  • step 113 an electrical signal is sent on the servo-distributor 15 to raise the mill gate and an electrical signal is sent on that of the coils the solenoid valve 66 which is suitable for bringing the wheel gate in the central position.
  • a transition transition 213 to a step 114 is crossed when the grinding wheel is in the high center position.
  • step 114 the electrical signal sent to the solenoid valve 63 is set to zero to stop the rotation of the grinding wheel.
  • step 114 From step 114, a transition 214 to step 115 is systematically taken.
  • step 115 an electrical signal is sent to the proportional distributor 71 to bring the beam back to the 0 ° position.
  • a transition 215 to a step 116 is crossed when the beam is returned to the 0 ° position.
  • step 116 the electrical signal sent to the solenoid valve 73 is cut so as to raise the beam and a timer is armed with a value slightly greater than the rise time of the beam.
  • step 116 an ironing transition 216 in step 101 is passed when the timer has elapsed.
  • the method which has just been described is preferably implemented with the automated welding grinding machine in track on a rail head 13 which comprises the main portable frame 9 arranged to be placed on the track and equipped with supports 10 describing an arc of a circle that covers the mushroom 13 perpendicular to the path.
  • the beam 12 is supported by the frame 9 so as to be able to turn around the mushroom 13 via the supports 10 and move towards and away from the center of the arc to take reference on the mushroom 13 of the rail and copy the profile of the mushroom 13 during the rotation of the beam 12.
  • the mill gate 23 is supported by the beam 12 of so as to be able to move in a first direction perpendicular to the beam 12 to bring a wheel 32 mounted on one end of the grinding wheel 23 closer to the center of the arc of a circle and in a second direction parallel to the beam 12 to effect a sweeping motion of the grinding wheel 32.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)

Description

L'invention concerne un équipement de meulage de rails, et plus particulièrement un équipement de meulage automatisé de profil de rails, destiné aux travaux neufs et à l'entretien sur des rails de voies ferrées et chemins de roulement analogues, notamment dans le domaine du transport ferroviaire.The invention relates to rail grinding equipment, and more particularly to an automated rail profile grinding equipment, for new works and maintenance on rails of similar railways and tracks, particularly in the field of rail grinding. rail transport.

Une meuleuse de profil de rails est un équipement conçu pour meuler le champignon du rail, principalement après soudage, en vue de donner à la zone de la soudure un profil identique au profil courant du rail.A rail profile grinder is a device designed to grind the rail head, mainly after welding, in order to give the weld area a profile identical to the current profile of the rail.

On connaît déjà des machines dites légères, utilisées principalement sur voie, qui comportent habituellement un châssis portant un outil abrasif qui est entrainé en rotation par un moteur (voir FR 2 661 698 A1 ou JP 7 207603 A ). L'outil abrasif est animé d'un mouvement de montée/descente, aussi appelé mouvement de plongée, permettant son rapprochement ou son éloignement du rail.We already know so-called light machines, mainly used on track, which usually comprise a chassis carrying an abrasive tool which is rotated by a motor (see FR 2 661 698 A1 or JP 7 207603 A ). The abrasive tool is driven by a rise / fall movement, also called a diving movement, allowing it to move closer or further away from the rail.

Le châssis de la machine et la meule portée peuvent être inclinés à volonté d'un côté ou de l'autre du rail, pour permettre le meulage de la table de roulement du rail, du flanc du champignon du rail intérieur à la voie, et des rayons de raccordement entre la table de roulement et chacun des flancs du champignon.The frame of the machine and the mounted wheel can be inclined at will on either side of the rail, to allow the grinding of the tread of the rail, the flank of the mushroom of the inner rail to the track, and connecting radii between the tread and each side of the mushroom.

Le meulage du rail étant habituellement assuré par des passes successives de l'outil abrasif, le châssis est muni de moyens de roulement constitués par un ensemble de galets copieurs pour permettre les mouvements alternés d'avance et de recul de la machine.The grinding of the rail being usually ensured by successive passes of the abrasive tool, the frame is provided with rolling means consisting of a set of copying rollers to allow the alternating movements of the machine in advance and back.

Mis à part l'entraînement motorisé de la meule, les meuleuses de profil de rail actuellement utilisées en voie sont généralement des machines à commande essentiellement manuelle. Notamment l'opérateur doit assurer le déplacement de la meuleuse par roulement le long du rail, alternativement en la poussant et en la tirant, contrôler le mouvement de plongée de la meule en positionnant l'outil abrasif à la hauteur désirée par l'intermédiaire d'un volant, positionner et maintenir manuellement l'inclinaison du châssis et de la meule.Aside from the motorized drive of the grinding wheel, the rail profile grinders currently used in track are generally essentially manual machines. In particular, the operator must move the grinder rolling along the rail, alternately by pushing and pulling it, control the dive movement of the grinding wheel. positioning the abrasive tool at the desired height by means of a steering wheel, position and manually maintain the inclination of the frame and the grinding wheel.

Dans l'ensemble, les meuleuses de profil de rails connues présentent de nombreux inconvénients. Les efforts physiques considérables à fournir par l'opérateur nuisent à l'ergonomie. Un déplacement des références dans la direction longitudinale du rail durant le meulage nuit à la précision du positionnement de la meule par rapport au rail. Des durées de quinze à trente minutes, nécessaires au meulage de finition d'une soudure ébavurée, nuisent aux performances. En termes de résultat, la qualité du travail dépend considérablement de la dextérité de l'opérateur.On the whole, known rail profile grinders have many disadvantages. The considerable physical effort to be provided by the operator is detrimental to ergonomics. Displacement of the references in the longitudinal direction of the rail during grinding adversely affects the accuracy of the positioning of the grinding wheel relative to the rail. Fifteen to thirty minute durations required to finish grinding a deburred weld adversely affect performance. In terms of result, the quality of the work depends greatly on the operator's dexterity.

D'autre part, la nécessité pour l'opérateur de se tenir à proximité immédiate de la zone de travail de la meule, dans une ambiance bruyante avec des poussières et des particules incandescentes, induit des conditions de travail pénibles.On the other hand, the need for the operator to stand in the immediate vicinity of the working area of the grinding wheel, in a noisy environment with dust and incandescent particles, induces laborious working conditions.

On connaît aussi déjà des machines dites fixes, utilisées exclusivement en ateliers, mettant en oeuvre des automatismes plus ou moins complexes pour réaliser le meulage de finition du cordon de soudure en garantissant un travail de qualité en un temps réduit. La rigidité de leur construction qui n'est pas contrainte par le gabarit ferroviaire d'une utilisation en voie, le bridage du rail dans la machine durant le meulage et l'intégration des mouvements de balayage de la meule dans une poutre pivotant autour du champignon du rail permettant d'utiliser des références non mobiles durant les balayages, sont des facteurs d'obtention d'un résultat optimal en atelier.We also already know so-called fixed machines, used exclusively in workshops, implementing more or less complex automation to perform the finishing grinding of the weld bead by ensuring quality work in a reduced time. The rigidity of their construction which is not constrained by the railway gauge of a use in track, the clamping of the rail in the machine during the grinding and the integration of the sweeping movements of the wheel in a beam pivoting around the mushroom of the rail making it possible to use non-moving references during the sweeps, are factors for obtaining an optimal result in the workshop.

A ce jour et comme décrit ci-dessus, le niveau technologique des machines d'atelier est sans commune mesure avec l'archaïsme des outillages utilisés sur voie. Cependant les machines d'atelier ne permettent pas de meuler les soudures faites sur site lors du montage final de la voie.To date and as described above, the technological level of the workshop machines is incommensurate with the archaism of the tools used on the track. However, workshop machines do not allow grinding the welds made on site during the final assembly of the track.

La présente invention a pour but de proposer un équipement qui remédie à l'ensemble des inconvénients de l'état de la technique, qui vient d'être décrit.The present invention aims to provide equipment that overcomes all the disadvantages of the state of the art, which has just been described.

Pour atteindre ce but, l'invention a pour objet une machine de meulage de soudure en voie sur un champignon de rail, comportant :

  • un châssis principal portable agencé pour être posé sur la voie et équipé d'au moins un support courbe décrivant un arc de cercle qui couvre ledit champignon perpendiculairement à la voie ;
  • une poutre reliée audit support courbe de façon à pouvoir se déplacer en rotation autour du champignon parallèlement à la voie sur le support courbe et à pouvoir se rapprocher et s'éloigner du champignon pour prendre une référence sur ledit champignon de manière à suivre le profil dudit champignon durant la rotation de la poutre;
  • un porte-meule supporté par la poutre de façon à pouvoir se déplacer dans une première direction perpendiculaire à la poutre pour rapprocher et éloigner du centre de l'arc de cercle une meule montée sur une extrémité du porte-meule et dans une deuxième direction parallèle à la poutre pour effectuer un mouvement de balayage de ladite meule.
To achieve this object, the invention relates to a welding grinding machine in track on a rail head, comprising:
  • a portable main frame arranged to be placed on the track and equipped with at least one curved support describing an arc which covers said mushroom perpendicular to the track;
  • a beam connected to said curved support so as to be able to move in rotation around the mushroom parallel to the track on the curved support and to be able to approach and move away from the mushroom to take a reference on said mushroom so as to follow the profile of said mushroom during the rotation of the beam;
  • a grinding wheel carrier supported by the beam so as to be movable in a first direction perpendicular to the beam to move a grinding wheel on one end of the grinding wheel and in a second parallel direction closer to and away from the center of the arc. to the beam to perform a scanning movement of said wheel.

Avantageusement, la machine de meulage de soudure en voie comporte un asservissement du positionnement du porte meule dans ladite première direction perpendiculaire à la poutre au moyen d'un vérin de déplacement radial du porte meule alimenté par un servo-distributeur en association avec un capteur de position.Advantageously, the on-track solder grinding machine comprises a servocontrol of the positioning of the grinding gate in said first direction perpendicular to the beam by means of a radial displacement cylinder of the grinding gate fed by a servo-distributor in association with a sensor. position.

Avantageusement aussi, la poutre comprend au moins une lame copieuse amenée et maintenue en contact sur un point dudit champignon pour chaque déplacement en rotation de la poutre de façon à conserver la même référence pendant le mouvement de balayage de la meule.Advantageously also, the beam comprises at least one hearty blade brought and maintained in contact on a point of said mushroom for each rotational movement of the beam so as to maintain the same reference during the sweeping movement of the grinding wheel.

De la sorte, il est possible de copier le profil du champignon durant la rotation de la poutre sans déplacement longitudinal des référencesIn this way, it is possible to copy the profile of the mushroom during the rotation of the beam without longitudinal displacement of the references.

Avantageusement encore, la poutre comprend un capteur phonique pour détecter un accostage de la meule sur le champignon de rail.Advantageously, the beam comprises a sound sensor for detecting a docking of the wheel on the rail head.

Particulièrement, la machine de meulage de soudure en voie comporte un vérin de déplacement longitudinal du porte meule associé à un capteur absolu de position pour automatiser le mouvement de balayage du porte meule avec des longueurs de courses variables.In particular, the rail-based grinding machine comprises a longitudinal displacement cylinder of the grinding wheel carrier associated with an absolute position sensor for automating the sweeping motion of the grinding wheel carrier with variable stroke lengths.

Particulièrement aussi, la poutre comprend un moteur hydraulique d'entraînement en rotation de la meule, et un capteur de pression monté sur l'alimentation du moteur hydraulique pour mesurer un effort fourni par le moteur hydraulique.Also particularly, the beam comprises a hydraulic motor driving the rotation of the wheel, and a pressure sensor mounted on the hydraulic motor power to measure a force provided by the hydraulic motor.

Le signal du capteur de pression est alors utilisé pour gérer la position du porte meule afin de compenser l'usure de la meule et pour détecter le meulage effectif de la soudure sur le champignon du rail.The pressure sensor signal is then used to manage the position of the mill gate to compensate for wheel wear and to detect effective grinding of the weld on the rail head.

Plus particulièrement dans le cas d'une soudure en creux, un mouvement de dégagement de la meule est opéré automatiquement en fin de chaque course de balayage afin de raccorder les surfaces meulées avec la partie brute du champignon du rail.More particularly in the case of a recessed weld, a wheel release movement is operated automatically at the end of each scan stroke to connect the ground surfaces with the raw portion of the rail head.

De préférence, la machine de meulage de soudure en voie comporte deux supports courbes et la poutre comprend un ou plusieurs galets droits à l'une des extrémités pour rouler sur un secteur de couronne droit de l'un des supports courbes et un ou plusieurs galets en V à l'autre des extrémités pour rouler sur un secteur de couronne en V de l'autre des supports courbes de façon à assurer un guidage à jeu réduit de la poutre en déplacement sur les supports courbes.Preferably, the track welding grinding machine comprises two curved supports and the beam comprises one or more straight rollers at one end for rolling on a straight crown sector of one of the curved supports and one or more rollers V at the other ends for rolling on a V-shaped crown sector on the other of the curved supports so as to provide a reduced clearance clearance of the beam moving on the curved supports.

Plus précisément, la machine de meulage de soudure en voie comporte un contrôleur d'automatismes programmable agencé pour contrôler et commander chaque déplacement de la poutre et du porte meule.More specifically, the welding grinding machine on the track comprises an automation controller Programmable controller arranged to control and control each movement of the beam and the mill gate.

Particulièrement, le contrôleur d'automatismes programmable comprend une mémoire stockant des données obtenues à partir d'une règle électronique portable de mesure de rectitude associée et un dispositif électronique de traitement programmé pour définir des positions et des longueurs des balayages en fonction de tolérance applicables, de façon à piloter un déroulement complet du cycle de meulage en mode automatique, sans intervention humaine.In particular, the programmable automation controller comprises a memory storing data obtained from an associated portable straightness measuring electronic rule and an electronic processing device programmed to define positions and lengths of the sweeps according to the applicable tolerance, in order to control a complete progress of the grinding cycle in automatic mode, without human intervention.

L'invention sera mieux comprise, et d'autres buts, caractéristiques, détails et avantages de celle-ci apparaîtront plus clairement dans la description explicative qui va suivre faite en référence aux dessins schématiques annexés donnés uniquement à titre d'exemple illustrant un mode de réalisation de l'invention et dans lesquels :

  • la figure 1 est une vue schématique en perspective d'une machine de meulage de rails conforme à l'invention;
  • la figure 2 est une vue à plus grande échelle du dispositif porteur de meule ;
  • la figure 3 montre des étapes de procédé conformes à l'invention ;
  • les figures 4 à 6 sont des schémas hydrauliques de commande des organes de la machine.
The invention will be better understood, and other objects, features, details and advantages thereof will appear more clearly in the explanatory description which follows, with reference to the appended schematic drawings given solely by way of example, illustrating a mode of embodiment of the invention and in which:
  • the figure 1 is a schematic perspective view of a rail grinding machine according to the invention;
  • the figure 2 is a view on a larger scale of the wheel carrier device;
  • the figure 3 shows process steps according to the invention;
  • the Figures 4 to 6 are hydraulic diagrams for controlling the machine's components.

L'unité de meulage de soudures en voie qui est représentée sur les figures 1 et 2, permet d'effectuer un meulage de finition des soudures de rails en supprimant le bourrelet de soudure sur le profil utile du champignon 13. Le meulage s'opère sur la surface de roulement 40, sur les rayons de guidage 41 et sur le flanc 42 intérieur à la voie des rails soudés. Le meulage s'exécute par passes longitudinales alternatives sur une longueur maximale sensiblement de 600 mm centrées ou non sur la soudure, combinées à un mouvement en rotation autour du champignon du rail.The unit of grinding of welds in track which is represented on figures 1 and 2 , makes it possible to perform a finishing grinding of the rail welds by eliminating the weld bead on the useful profile of the poppet 13. The grinding takes place on the rolling surface 40, on the guide spokes 41 and on the sidewall 42 inside the track welded rails. The grinding is carried out by alternating longitudinal passes over a maximum length of substantially 600 mm centered or not on the welding, combined with a rotational movement around the rail head.

Une meule à boisseau 32 est montée en extrémité d'une broche logée dans un corps en aluminium porte-meule 23 et entraînée en rotation par un moteur hydraulique 11. Cette broche est inclinée d'un angle faible de l'ordre de 1° par rapport à l'axe vertical pour favoriser la coupe de la meule.A plug wheel 32 is mounted at the end of a spindle housed in a grinding aluminum body 23 and driven in rotation by a hydraulic motor 11. This spindle is inclined at a slight angle of the order of 1 ° by relative to the vertical axis to promote cutting of the grinding wheel.

Quatre patins 21 à rouleaux précontraints sont fixés sur le porte-meule 23. Les patins 21 sont montés sur deux rails de guidage 22 solidaires d'une équerre support 24. Le positionnement relatif du porte-meule 23 par rapport à l'équerre 24, définissant la profondeur de passe, est assuré par un vérin hydraulique 33.Four shoes 21 with prestressed rollers are fixed on the grinding wheel holder 23. The skids 21 are mounted on two guide rails 22 integral with a support bracket 24. The relative positioning of the grinding wheel carrier 23 with respect to the bracket 24, defining the depth of pass, is provided by a hydraulic cylinder 33.

Le vérin hydraulique 33 est alimenté par un servo-distributeur 15 permettant de contrôler le sens et la vitesse de déplacement. En association avec un capteur de position sans contact 35 donnant des mesures absolues de la position de la tige du vérin 33, un contrôleur d'automatismes programmable temps réel 31 permet l'asservissement en position de la meule avec une résolution de 0,05mm.The hydraulic jack 33 is fed by a servo-distributor 15 for controlling the direction and the speed of displacement. In association with a non-contact position sensor 35 giving absolute measurements of the position of the cylinder rod 33, a programmable real-time automation controller 31 allows the position of the wheel to be servo-controlled with a resolution of 0.05 mm.

Lors d'une première descente de la meule 32 sur le rail, le contrôleur d'automatismes programmable temps réel 31, qui reçoit le signal fourni par un capteur phonique 16, commande l'arrêt du mouvement dès que le seuil prédéfini correspondant à l'accostage de la meule sur le champignon 13 du rail est atteint.During a first descent of the grinding wheel 32 on the rail, the real-time programmable automation controller 31, which receives the signal supplied by a sound sensor 16, controls the stopping of the movement as soon as the predetermined threshold corresponding to the docking of the wheel on the mushroom 13 of the rail is reached.

En mode semi-automatique, un opérateur commande le mouvement de montée/descente de la meule par pas de 0,05mm par l'intermédiaire d'un manipulateur situé sur le coffret de commande 50.In semi-automatic mode, an operator controls the up / down movement of the grinding wheel in steps of 0.05mm through a manipulator on the control box 50.

En mode automatique, le signal d'un capteur de pression 65 monté sur l'alimentation du moteur hydraulique 11 de rotation de la meule est utilisé par le contrôleur d'automatismes programmable temps réel pour détecter le meulage effectif. Lorsque la meule n'est pas en contact du rail, une pression faible suffit à la faire tourner. A vitesse de rotation constante imposée par le débit de fluide dans le moteur hydraulique 11, la pression s'élève considérablement lorsque la meule en contact avec le rail, est freinée par le travail d'abrasion. Au cours du balayage de la meule le long du rail, les variations de pression se réduisent progressivement pour rester contenues en fin de meulage dans une plage de valeurs comprises entre deux seuils correspondant à un effleurement de la meule sur le rail. Une détection de pression restant comprise entre deux seuils prédéfinis permet alors de commander une rotation de la poutre. Le capteur de pression 65 est aussi utilisé par le contrôleur d'automatismes programmable temps réel pour commander automatiquement le positionnement de la meule par pas de 0,05mm en fonction du niveau de pression permettant ainsi de compenser l'usure de la meule et d'éviter une réduction excessive de la vitesse de rotation.In automatic mode, the signal of a pressure sensor 65 mounted on the feed of the hydraulic wheel rotation motor 11 is used by the real-time programmable automation controller to detect the actual grinding. When the wheel is not in contact with the rail, a low pressure is sufficient to turn it. At constant speed imposed by the fluid flow in the hydraulic motor 11, the pressure rises considerably when the wheel in contact with the rail is braked by the abrasion work. During the sweeping of the grinding wheel along the rail, the pressure variations are gradually reduced to remain contained at the end of grinding in a range of values between two thresholds corresponding to a touch of the grinding wheel on the rail. A pressure detection remaining between two predefined thresholds then makes it possible to control a rotation of the beam. The pressure sensor 65 is also used by the real-time programmable automation controller to automatically control the positioning of the grinding wheel in steps of 0.05mm depending on the pressure level, thus making it possible to compensate for the wear of the grinding wheel and avoid excessive reduction of the rotation speed.

L'équerre support 24 est fixée sur quatre chariots à rouleaux précontraints 25 montés sur deux rails de guidage 26 solidaires d'une poutre de meulage 12. Les mouvements alternatifs parallèles à la voie, de course réglable, sont rendus automatiques par l'association d'un vérin hydraulique 17 avec un capteur absolu de position à câble 19 montés sur la poutre de meulage 12.The support bracket 24 is fixed on four prestressed roller carriages 25 mounted on two guide rails 26 integral with a grinding beam 12. The reciprocating movements parallel to the track, of adjustable stroke, are made automatic by the combination of a hydraulic cylinder 17 with an absolute cable position sensor 19 mounted on the grinding beam 12.

En mode semi-automatique, un opérateur définit la longueur de meulage de part et d'autre de la soudure par l'intermédiaire de potentiomètres situés sur le coffret de commande 50.In semi-automatic mode, an operator defines the grinding length on either side of the weld by means of potentiometers located on the control box 50.

En mode automatique, la position et la longueur de meulage sont gérées automatiquement par le contrôleur d'automatismes programmable temps réel 31. Cette gestion automatique est rendue possible par l'utilisation d'une règle électronique portable de mesure. Préalablement à la pose de l'unité 1 sur la voie, on réalise des mesures de la rectitude du rail sur le champignon 13 au droit de la soudure. Les données sont enregistrées dans un dispositif électronique qui permet de définir les zones hors tolérances en fonction des normes applicables. La règle comprend un dispositif électronique qui est par exemple un assistant numérique personnel (PDA acronyme de personal digital assistant en anglais) qui communique avec le processeur de la règle par une liaison conforme à la norme IEEE 802.15. Le dispositif électronique est ensuite connecté au contrôleur 31, par exemple au moyen d'un bus à transmission série (USB acronyme de Universal Serial Bus en anglais), pour lui communiquer les paramètres de meulage applicables.In automatic mode, the position and the grinding length are managed automatically by the real-time programmable automation controller 31. This automatic management is made possible by the use of a portable electronic measuring rule. Prior to the installation of the unit 1 on the track, measurements of the straightness of the rail on the mushroom 13 to the right of the welding. The data is stored in an electronic device that allows to define out-of-tolerance areas according to the applicable standards. The rule comprises an electronic device which is for example a personal digital assistant (PDA acronym for personal digital assistant in English) which communicates with the processor of the rule by a connection compliant with the IEEE 802.15 standard. The electronic device is then connected to the controller 31, for example by means of a serial transmission bus (USB acronym for Universal Serial Bus in English), to communicate the applicable grinding parameters.

Dans le cas d'une soudure en creux, la remontée de la meule est automatique en fin de chaque course afin de raccorder les surfaces meulées avec la partie brute du rail. A environ 25 mm de la fin de chaque course, le vérin hydraulique 33 dégage le porte-meule 23 d'environ 0,5 mm et le redescend en début de mouvement inverse, ces valeurs sont paramétrables. En mode semi-automatique, cette fonction complémentaire est activée ou non par l'opérateur depuis le coffret de commande 50. En mode automatique, cette fonction est automatiquement activée si une soudure en creux a été détectée lors de la phase de définition des zones hors tolérances.In the case of a hollow weld, the rise of the wheel is automatic at the end of each race to connect the ground surfaces with the raw part of the rail. At approximately 25 mm from the end of each stroke, the hydraulic jack 33 releases the grinding wheel 23 by approximately 0.5 mm and returns it at the beginning of the reverse movement, these values can be parameterized. In semi-automatic mode, this additional function is activated or not by the operator from the control box 50. In automatic mode, this function is automatically activated if a recessed weld has been detected during the definition phase of the out-of-box zones. tolerances.

La poutre de meulage 12 est équipée de guidages à chaque extrémité, composés chacun d'un patin à rouleaux précontraints 27 monté sur un rail de guidage. Deux vérins hydrauliques 18 montés sur chacun des deux bras verticaux donnent le mouvement de descente de la poutre 12 vers le rail 28 depuis la position initiale de dégagement. Le contact avec le champignon 13 du rail 28 s'établit par l'intermédiaire de deux lames copieuses 52 solidaires de la poutre et distantes de 1 m. Les lames copieuses permettent de placer et de maintenir en référence la poutre 12 durant sa rotation autour du champignon 13 du rail 28 grâce à une régulation maintenant une pression constante dans les vérins 18.The grinding beam 12 is provided with guides at each end, each consisting of a prestressed roller shoe 27 mounted on a guide rail. Two hydraulic cylinders 18 mounted on each of the two vertical arms give the downward movement of the beam 12 to the rail 28 from the initial position of disengagement. The contact with the mushroom 13 of the rail 28 is established by means of two copious blades 52 integral with the beam and 1 m apart. The copious blades make it possible to place and keep in reference the beam 12 during its rotation around the mushroom 13 of the rail 28 by means of a regulation maintaining a constant pressure in the jacks 18.

La poutre de meulage 12 tourne autour du champignon 13 du rail 28 par l'intermédiaire d'un mécanisme embarqué composé d'un motoréducteur hydraulique 20 et d'un arbre de transmission équipé de deux pignons 30. Dans le mode de réalisation illustré par la figure 2, l'ensemble ci-dessus décrit est rigidifié par une traverse 53 par rapport à laquelle s'effectue le mouvement de montée descente de la poutre 12. Chacun des pignons 30 entraîne en rotation la poutre 12 et ici aussi la traverse 53 par l'intermédiaire de deux chaînes tendues sur deux supports courbes 10 solidaires du châssis principal 9. Sur la figure 1, seul le support courbe de droite est visible, le support courbe de gauche étant masqué par une paroi du châssis principal 9. Le guidage de précision en rotation est assuré par huit galets 8 et 58 solidaires de la poutre 12, roulant sur deux secteurs de couronne 7. L'un des côtés de la poutre est équipé de galets 58 de guidage et secteur de couronne à gorge en V alors que l'autre côté est équipée de galets 8 de guidage et secteur de couronne droit pour assurer un guidage à jeu réduit sans être hyperstatique. Deux fins de course 6 détectent les positions angulaires extrêmes et un troisième fin de course indique la position verticale initiale, les contacts extrêmes coupant la commande de rotation de la poutre.The grinding beam 12 rotates around the head 13 of the rail 28 via an on-board mechanism consisting of a hydraulic geared motor 20 and a transmission shaft equipped with two gears 30. In the embodiment illustrated by FIG. figure 2 , the assembly described above is stiffened by a cross member 53 with respect to which the upward movement of the beam 12 is carried out. Each of the gears 30 rotates the beam 12 and here also crosses 53 through the beam 12. intermediate two chains stretched on two curved supports 10 integral with the main frame 9. On the figure 1 , only the curved support of the right is visible, the left curved support being masked by a wall of the main frame 9. Precision guidance in rotation is provided by eight rollers 8 and 58 integral with the beam 12, rolling on two sectors of 7. One of the sides of the beam is equipped with guide rollers 58 and V-groove crown sector while the other side is equipped with guide rollers 8 and straight crown sector to provide clearance guidance. reduced without being hyperstatic. Two limit switches 6 detect the extreme angular positions and a third limit switch indicates the initial vertical position, the extreme contacts cutting the rotation control of the beam.

La plage angulaire de meulage s'étend de 90° vers l'intérieur de la voie à 20° vers l'extérieur. Ainsi, les deux supports courbes 10 solidaires du châssis principal 9 décrivent un arc de cercle qui couvre le champignon 13 perpendiculairement à la voie sur 110°.The angular grinding range extends from 90 ° to the inside of the track at 20 ° outwards. Thus, the two curved supports 10 integral with the main frame 9 describe an arc that covers the mushroom 13 perpendicular to the 110 ° track.

En mode semi-automatique, un opérateur contrôle le sens et la vitesse de rotation de la poutre de meulage 12 par l'intermédiaire d'un manipulateur et d'un potentiomètre situés sur le coffret de commande 50.In semi-automatic mode, an operator controls the direction and speed of rotation of the grinding beam 12 via a manipulator and a potentiometer located on the control box 50.

En mode automatique, le moteur hydraulique 20 est équipé d'un capteur de vitesse intégré permettant au contrôleur d'automatismes programmable temps réel de gérer l'indexation angulaire de la poutre de meulage. Le capteur de vitesse intégré est par exemple de type générateur d'impulsions. Un compteur dans le contrôleur 31 permet alors de mesurer l'angle de déplacement par sommation des impulsions échantillonnées.In automatic mode, the hydraulic motor 20 is equipped with an integrated speed sensor enabling the real-time programmable automation controller to manage the angular indexing of the grinding beam. The integrated speed sensor is for example of the pulse generator type. A counter in the controller 31 then makes it possible to measure the displacement angle by summation of the sampled pulses.

Le châssis principal 9, constitué de profilés mécano soudés, supporte les secteurs de couronnes ainsi que les chaînes tendues permettant la rotation de la poutre. Le châssis 9, en position de travail, repose sur les deux files de rail 28, 29 de manière à compenser un éventuel dévers de la voie. La table de roulement est utilisée comme référence pour la position 0° de la poutre 12. Deux vérins horizontaux 79, non visibles sur les figures 1 et 2 car situés sous l'unité 1, assurent le ripage et le maintien en référence du châssis sur le flanc intérieur du rail 28 traité. Quatre galets avec joues de guidage, placés aux extrémités et actionnés par vérins 85, non représentés sur les figures 1 et 2, permettent de relever l'unité 1 pour la dégager du gabarit bas de la voie et de la déplacer sur voie en compatibilité avec le gabarit de circulation.The main frame 9, made of mechanically welded sections, supports the sectors of crowns as well as the tensioned chains allowing the rotation of the beam. The chassis 9, in the working position, rests on the two rails 28, 29 so as to compensate for any cant of the track. The tread is used as a reference for the 0 ° position of the beam 12. Two horizontal cylinders 79, not visible on the figures 1 and 2 as located under the unit 1, provide shifting and maintaining reference frame on the inner side of the rail 28 treated. Four rollers with guide cheeks, placed at the ends and actuated by jacks 85, not shown on the figures 1 and 2 , allow the unit 1 to be lifted out of the lower jig of the lane and moved on the lane in compatibility with the circulation jig.

L'unité 1 est équipée d'une chape d'adaptation 55 en partie supérieure du châssis permettant une liaison mécanique avec le point d'attache du véhicule porteur. Le véhicule porteur assure une fonction de manutention lors de la mise en voie de l'unité 1, une fonction de retournement de l'unité pour travailler sur la file de rail opposée et une fonction de remorquage sur voie. L'énergie nécessaire au fonctionnement de l'unité est fournie par le véhicule porteur. Le raccordement hydraulique et électrique s'effectue au niveau de la chape 55 de l'unité par connections rapides. A titre d'exemple non limitatif, l'énergie électrique est fournie avec une tension de 24 V et l'énergie hydraulique est fournie avec un débit de 105 l/min à une pression de 160 bar.The unit 1 is equipped with an adaptation yoke 55 in the upper part of the chassis allowing a mechanical connection with the point of attachment of the carrier vehicle. The carrier vehicle provides a handling function when setting up unit 1 track, a reversing function of the unit to work on the opposite rail queue and a towing function on the track. The energy required to operate the unit is provided by the carrier vehicle. The hydraulic and electrical connection is made at the clevis 55 of the unit by quick connections. By way of non-limiting example, the electrical energy is supplied with a voltage of 24 V and the hydraulic energy is supplied with a flow rate of 105 l / min at a pressure of 160 bar.

L'unité est pourvue d'un capotage 51 partiellement transparent avec système d'extraction des fumées, non représenté, protégeant efficacement l'opérateur des projections de meulage tout en offrant une visibilité optimale sur la zone de meulage. En variante, un système d'aspiration des poussières, installé sur le véhicule porteur et raccordé par gaine flexible au capotage de l'unité de meulage, permet d'assurer une filtration efficace des poussières générées.The unit is provided with a partially transparent hood 51 with smoke extraction system, not shown, effectively protecting the operator from grinding projections while providing optimum visibility on the grinding area. Alternatively, a dust suction system, installed on the carrier vehicle and connected by flexible duct to the cowling of the grinding unit, ensures effective filtration of the dust generated.

En entrée du circuit hydraulique représenté sur les figures 4 à 6, un limiteur de pression 62 associé à une électrovanne 61 de validation de pression, sécurise le fonctionnement de l'équipement.At the input of the hydraulic circuit represented on the Figures 4 to 6 , a pressure limiter 62 associated with a solenoid valve 61 of pressure validation, secures the operation of the equipment.

Le moteur hydraulique 11 d'entraînement de la meule en rotation reçoit un débit de fluide régulé par une électrovanne 63 et un régulateur de débit 64. Un prélèvement de fluide représenté en pointillés, permet une autolubrification du porte meule 23.The hydraulic motor 11 for driving the rotating grinding wheel receives a flow of fluid regulated by a solenoid valve 63 and a flow regulator 64. A fluid sample represented in dashed lines, allows an auto-lubrication of the grinding wheel carrier 23.

Le vérin hydraulique 17 de balayage du porte meule le long de la poutre, est commandé par une électrovanne 66 et un réducteur de pression 67. Un pont de Graetz hydraulique 69 associé à un régulateur de débit 68 permet d'assurer une vitesse constante de déplacement du porte meule dans un sens comme dans l'autre, indépendamment de la section de la tige qui fait varier différemment le volume de la chambre en amont et en aval du piston du vérin 17.The hydraulic cylinder 17 sweeping the door mills along the beam, is controlled by a solenoid valve 66 and a pressure reducer 67. A hydraulic Graetz bridge 69 associated with a flow regulator 68 ensures a constant speed of movement grinding gate in one direction as in the other, regardless of the section of the rod which varies differently the volume of the chamber upstream and downstream of the piston of the cylinder 17.

Le distributeur proportionnel 71 à action direct avec rétroaction électrique de position, associé à une balance de pression 72 et à une réduction de pression 57 permet de commander la rotation de la poutre 12. Une électrovanne 70 permet de commander un frein de sécurité 56 pour bloquer le motoréducteur hydraulique 20 en absence de commande de rotation de la poutre ou en cas de défaut. Deux valves d'équilibrage 60 garantissent un mouvement sans à-coup de la poutre.The proportional distributor 71 with direct action with electrical position feedback, associated with a pressure balance 72 and with a pressure reduction 57 makes it possible to control the rotation of the beam 12. A solenoid valve 70 makes it possible to control a safety brake 56 to block the hydraulic geared motor 20 in the absence of rotation control of the beam or in the event of a fault. Two balancing valves 60 guarantee a smooth movement of the beam.

Les vérins 18 de descente de la poutre sont alimentés en fluide par une électrovanne 73 à deux positions associée à une réduction de pression 74, la position commandée en courant correspondant à la descente de la poutre et la position à manque de courant correspondant à la remontée de la poutre. Un régulateur de débit 75m, court-circuité par un clapet anti-retour lors de la descente de la poutre, assure un débit constant et donc une vitesse constante de remontée de la poutre. Un régulateur de débit 75d, court-circuité par un clapet anti-retour lors de la remontée de la poutre, assure un débit constant et donc une vitesse constante de descente de la poutre. Un clapet 90 de sécurité empêche la descente non commandée de la poutre.The jacks 18 for lowering the beam are supplied with fluid by a two-position solenoid valve 73 associated with a pressure reduction 74, the current-controlled position corresponding to the descent of the beam and the position with no current corresponding to the ascent. of the beam. A 75m flow regulator, short-circuited by a non-return valve during the descent of the beam, ensures a constant flow and therefore a constant rate of rise of the beam. A flow regulator 75d, short-circuited by a non-return valve during the ascent of the beam, ensures a constant flow rate and therefore a constant rate of descent of the beam. A safety valve 90 prevents the uncontrolled descent of the beam.

Les vérins 79 horizontaux de bridage et d'alignement du châssis sont alimentés en fluide par une électrovanne 76 associée à un régulateur de débit 77 et à un réducteur de pression 78.The horizontal clamping and alignment cylinders 79 of the frame are supplied with fluid by a solenoid valve 76 associated with a flow regulator 77 and a pressure reducer 78.

Quatre vérins 85 de levage et de pose du châssis 9 sur la voie, sont alimentés par un diviseur de débit 83 avec synchronisation. Une électrovanne 80 à trois positions commande la montée, la descente ou le maintien en position du châssis en combinaison avec des régulateurs de débit 82 et un réducteur de pression 81. Un clapet 84 de sécurité empêche la descente non commandée du châssis.Four jacks 85 for lifting and laying the chassis 9 on the track, are fed by a flow divider 83 with synchronization. A three-position solenoid valve 80 controls the raising, lowering or holding in position of the chassis in combination with flow regulators 82 and a pressure reducer 81. A safety valve 84 prevents uncontrolled lowering of the chassis.

Le vérin 33 de descente du porte meule est alimenté par le servo-distributeur proportionnel 15 associé au capteur de position 35 pour déplacer le porte-meule 23 dans la direction perpendiculaire à la poutre 12 de façon à rapprocher et éloigner la meule 32 montée sur une extrémité du porte-meule 23 du centre de l'arc de cercle décrit par les supports courbes 10.The ram 33 for lowering the mill gate is fed by the proportional servo-distributor 15 associated with the position sensor 35 to move the grinding wheel holder 23 in the direction perpendicular to the beam 12 so as to bring the wheel 32 mounted on a end of the grinding wheel 23 of the center of the arc described by the curved supports 10.

L'organigramme de la figure 3 montre les étapes essentielles d'un procédé de meulage conforme à l'invention et exécuté par le contrôleur d'automatismes programmable temps réel 31. L'organigramme peut être parcouru par un cycle semi-automatique ou par un cycle automatique. Dans la suite de la description, nous préciserons les actions des étapes qui sont effectuées sous commande et/ou sous contrôle d'un opérateur humain dans le cadre du parcours en cycle semi-automatique et si besoin les actions des étapes qui sont effectuées automatiquement. En absence de précisions, les réceptivités des transitions et les actions des étapes sont identiques en mode semi-automatique et en mode automatique.The organization chart of the figure 3 shows the essential steps of a grinding method according to the invention and executed by the real-time programmable automation controller 31. The flowchart can be through a semi-automatic cycle or an automatic cycle. In the remainder of the description, we will specify the actions of the steps that are performed under control and / or under the control of a human operator as part of the semi-automatic cycle and if necessary the actions of the steps that are performed automatically. In the absence of precisions, the receptions of the transitions and the actions of the steps are identical in semi-automatic mode and in automatic mode.

Le contrôleur d'automatismes programmable temps réel 31 est par défaut dans une étape 101 d'attente.The programmable real-time automation controller 31 is by default in a waiting step 101.

A partir de l'étape 101, une transition 201 de passage à une étape 102 est franchie lorsqu'un ensemble de conditions initiales est réalisé et lorsqu'un cycle semi-automatique ou automatique est activé. L'activation semi-automatique ou automatique, est mémorisée jusqu'à la fin du cycle sauf passage volontaire d'un mode de fonctionnement à l'autre en cours de cycle. L'ensemble de conditions initiales comprend un état de l'unité raccordée hydrauliquement et électriquement au porteur, un état de l'unité positionnée au droit de la soudure, un état de la poutre de meulage en position verticale et en position haute, un état de la meule en position haute et centrée, un état de l'unité descendue sur la voie et bridée en référence.From step 101, a transition 201 to a step 102 is crossed when a set of initial conditions is realized and when a semi-automatic or automatic cycle is activated. The semi-automatic or automatic activation is memorized until the end of the cycle unless a voluntary change from one mode of operation to another during the cycle. The set of initial conditions comprises a state of the unit hydraulically and electrically connected to the carrier, a state of the unit positioned at the weld, a state of the grinding beam in a vertical position and in a raised position, a state of the wheel in the high and centered position, a state of the unit descended on the track and clamped by reference.

Dans l'étape 102, un signal électrique est envoyé à l'électrovanne 63 pour mettre la meule en rotation et un signal électrique est envoyé à l'électrovanne 73 pour descendre la poutre.In step 102, an electrical signal is sent to the solenoid valve 63 to rotate the wheel and an electrical signal is sent to the solenoid valve 73 to lower the beam.

A partir de l'étape 102, une transition 202 de passage à une étape 103 est franchie après écoulement d'une temporisation.From step 102, a transition 202 to a step 103 is passed after a timeout has elapsed.

Dans l'étape 103, un signal électrique est envoyé au distributeur proportionnel 15 pour descendre le porte meule.In step 103, an electrical signal is sent to the proportional distributor 15 to lower the mill gate.

A partir de l'étape 103, une transition 203 de passage à une étape 104 est franchie après détection de contact de la meule avec le champignon par le capteur phonique 16.From step 103, a transition 203 to a step 104 is reached after detection of contact of the wheel with the mushroom by the sound sensor 16.

Dans l'étape 104, le signal électrique envoyé au distributeur proportionnel 15 est mis à une valeur qui arrête la descente du porte meule.In step 104, the electrical signal sent to the proportional distributor 15 is set to a value which stops the descent of the mill carrier.

A partir de l'étape 104, une transition 204 de passage à une étape 105, à une étape 107 et à une étape 110 est systématiquement franchie.From step 104, a transition 204 to a step 105, a step 107 and a step 110 is systematically completed.

Dans l'étape 105, un signal électrique est envoyé sur une première bobine de l'électrovanne 66 pour effectuer un balayage du porte meule vers la gauche.In step 105, an electrical signal is sent on a first coil of solenoid valve 66 to sweep the grinding door to the left.

A partir de l'étape 105, une transition 205 de passage à une étape 106 est franchie après détection de position extrême gauche par le capteur absolu de position à câble 19.From step 105, a transition 205 to a step 106 is passed after detection of extreme left position by the absolute position sensor cable 19.

Dans l'étape 106, un signal électrique est envoyé sur une deuxième bobine de l'électrovanne 66 pour effectuer un balayage du porte meule vers la droite.In step 106, an electrical signal is sent on a second coil of solenoid valve 66 to sweep the grinding gate to the right.

A partir de l'étape 106, une transition 206 de rebouclage sur l'étape 105 est franchie après détection de position extrême droite par le capteur absolu de position à câble 19.From step 106, a loopback transition 206 on step 105 is crossed after detection of extreme right position by the absolute cable position sensor 19.

En mode semi-automatique, les valeurs de position extrême gauche et de position extrême droite sont modifiables à tout moment par l'opérateur humain de façon à régler une amplitude de meulage. L'opérateur humain peut aussi sélectionner et désélectionnér à tout moment une fonction de meulage en creux qui consiste à synchroniser avec l'étape 107, une remontée de la meule avant d'atteindre chaque position extrême et une redescente au retour.In semi-automatic mode, the far left position and far right position values can be changed at any time by the human operator to adjust a grinding amplitude. The human operator can also select and deselect at any time a recessed grinding function which consists of synchronizing with step 107, a rise of the grinding wheel before reaching each extreme position and a return to the return.

En mode automatique, les valeurs de position extrême gauche et de position extrême droite sont calculées suivant des amplitudes de meulage prédéfinies qui résultent de mesures préliminaires. Les résultats de mesures préliminaires peuvent aussi enclencher et déclencher à tout moment la fonction de meulage en creux.In automatic mode, the far left position and far right position values are calculated according to predefined grinding amplitudes that result from preliminary measurements. The results of Preliminary measurements can also trigger and trigger the recessed grinding function at any time.

L'étape 107 est une étape d'attente.Step 107 is a waiting step.

A partir de l'étape 107, une transition 207 de passage à une étape 108, est franchie suite à une demande de mouvement du porte meule en montée ou en descente par l'opérateur humain en mode semi-automatique ou suite à une commande de mouvement en mode automatique du porte meule en montée ou en descente par différentes fonctions. La fonction de meulage en creux commande une remontée progressive de la meule lorsque le capteur absolu de position à câble 19 donne une valeur qui évolue depuis un seuil prédéfini vers la position extrême puis commande une redescente progressive de la meule lorsque le capteur absolu de position à câble 19 donne une valeur qui évolue depuis la position extrême vers le seuil prédéfini. D'autres fonctions sont possibles, notamment une fonction de rectification qui reçoit en entrée la mesure du capteur de pression 65, commande une descente qui a pour effet d'augmenter la pression d'entraînement du moteur hydraulique 11 à vitesse constante pour vaincre des efforts d'abrasion croissants ou commande une montée qui a pour effet de diminuer la pression d'entraînement du moteur hydraulique 11 à vitesse constante pour vaincre des efforts d'abrasion décroissants de façon à maintenir la pression d'entraînement dans une plage de valeurs qui correspond à des efforts d'abrasion optimaux. La fonction de rectification qui vient d'être décrite, a pour mérite de corriger automatiquement l'usure de la meule.From step 107, a transition 207 to a step 108, is passed following a request for movement of the wheel gate up or down by the human operator in semi-automatic mode or following a command of movement in automatic mode of the wheel gate up or down by different functions. The hollow grinding function controls a gradual raising of the grinding wheel when the absolute cable position sensor 19 gives a value that changes from a predefined threshold to the extreme position and then orders a progressive lowering of the grinding wheel when the absolute position sensor at cable 19 gives a value that changes from the extreme position to the predefined threshold. Other functions are possible, in particular a grinding function which receives as input the measurement of the pressure sensor 65, controls a descent which has the effect of increasing the driving pressure of the hydraulic motor 11 at a constant speed to overcome forces of increasing abrasion or controlling a rise which has the effect of reducing the driving pressure of the hydraulic motor 11 at a constant speed to overcome decreasing abrasion forces so as to maintain the driving pressure in a corresponding range of values to optimal abrasion efforts. The grinding function that has just been described, has the merit of automatically correcting the wear of the grinding wheel.

Dans l'étape 108, un signal électrique est envoyé sur le servo-distributeur 15 pour mouvoir le porte meule sur une course de 0,05 mm.In step 108, an electrical signal is sent on the servo-distributor 15 to move the mill carrier over a 0.05 mm stroke.

A partir de l'étape 108, une transition 208 de passage à une étape 109 est franchie après détection de fin de mouvement contrôlé par le capteur incrémental à interface série synchrone (SSI pour Synchronous Serial Interface en anglais).From step 108, a transition 208 to a step 109 is passed after detection of end of movement controlled by the synchronous serial interface incremental sensor (SSI Synchronous Serial Interface in English).

Dans l'étape 109, le signal électrique envoyé sur le servo-distributeur 15 est mis à une valeur qui arrête le mouvement de montée descente du porte meule.In step 109, the electrical signal sent on the servo-distributor 15 is set to a value which stops the downward movement of the mill carrier.

A partir de l'étape 109, une transition 209 de rebouclage sur l'étape 107 est systématiquement franchie.From step 109, a loopback transition 209 on step 107 is systematically crossed.

L'étape 110 est une étape d'attente.Step 110 is a waiting step.

A partir de l'étape 110, une transition 210 de passage à une étape 111, est franchie, à condition qu'aucun fin de course ne soit activé, suite à une demande de rotation de la poutre en avant ou en arrière par l'opérateur humain en mode semi-automatique ou suite à une commande de rotation de la poutre en avant ou en arrière par différentes fonctions.From step 110, a transition transition 210 to a step 111 is crossed, provided that no limit switch is activated, following a request for rotation of the beam forward or backward by the human operator in semi-automatic mode or following a command to rotate the beam forward or backward by different functions.

Dans l'étape 111, un signal électrique est envoyé sur l'une ou l'autre des bobines de l'électrovanne 71 selon que la rotation est demandée vers l'avant ou vers l'arrière. Un signal électrique est aussi envoyé sur la bobine de l'électrovanne 70 pour relâcher le frein 56.In step 111, an electric signal is sent on one or other of the solenoid valve coils 71 depending on whether the rotation is required forwards or backwards. An electrical signal is also sent on the coil of the solenoid valve 70 to release the brake 56.

A partir de l'étape 111, une transition 211 de passage à une étape 112 est franchie après détection de fin de course ou relâchement de la demande de rotation en mode semi-automatique ou position atteinte en mode automatique.From step 111, a transition 211 to a step 112 is crossed after end-of-travel detection or release of the rotation request in semi-automatic mode or position reached in automatic mode.

Dans l'étape 112, les signaux électriques envoyés aux électrovannes 70 et 71 sont coupés pour immobiliser la poutre.In step 112, the electrical signals sent to the solenoid valves 70 and 71 are cut off to immobilize the beam.

A partir de l'étape 112, une transition 212 de rebouclage sur l'étape 110 est systématiquement franchie.From step 112, a loopback transition 212 on step 110 is systematically crossed.

A partir de chacune des étapes 105, 106, 107 et 110, respectivement une transition 305, 306, 307 et 310 de passage à une étape 113 est franchie si une fin de cycle est demandée en mode semi-automatique ou commandée en mode automatique.From each of the steps 105, 106, 107 and 110, respectively, a transition 305, 306, 307 and 310 to a step 113 is crossed if an end of cycle is requested in semi-automatic mode or controlled in automatic mode.

Dans l'étape 113, un signal électrique est envoyé sur le servo-distributeur 15 pour remonter le porte meule et un signal électrique est envoyé sur celle des bobines de l'électrovanne 66 qui convient pour ramener le porte meule en position centrale.In step 113, an electrical signal is sent on the servo-distributor 15 to raise the mill gate and an electrical signal is sent on that of the coils the solenoid valve 66 which is suitable for bringing the wheel gate in the central position.

A partir de l'étape 113, une transition 213 de passage à une étape 114 est franchie lorsque le porte meule est en position haute centrée.From step 113, a transition transition 213 to a step 114 is crossed when the grinding wheel is in the high center position.

Dans l'étape 114, le signal électrique envoyé à l'électrovanne 63 est mis à zéro pour arrêter la rotation de la meule.In step 114, the electrical signal sent to the solenoid valve 63 is set to zero to stop the rotation of the grinding wheel.

A partir de l'étape 114, une transition 214 de passage à une étape 115 est systématiquement franchie.From step 114, a transition 214 to step 115 is systematically taken.

Dans l'étape 115, un signal électrique est envoyé au distributeur proportionnel 71 pour ramener la poutre en position à 0°.In step 115, an electrical signal is sent to the proportional distributor 71 to bring the beam back to the 0 ° position.

A partir de l'étape 115, une transition 215 de passage à une étape 116 est franchie lorsque la poutre est ramenée à la position 0°.From step 115, a transition 215 to a step 116 is crossed when the beam is returned to the 0 ° position.

Dans l'étape 116 le signal électrique envoyé à l'électrovanne 73 est coupé de façon à remonter la poutre et une temporisation est armée de valeur légèrement supérieure au temps de remontée de la poutre.In step 116 the electrical signal sent to the solenoid valve 73 is cut so as to raise the beam and a timer is armed with a value slightly greater than the rise time of the beam.

A partir de l'étape 116, une transition 216 de repassage à l'étape 101 est franchie lorsque la temporisation est écoulée.From step 116, an ironing transition 216 in step 101 is passed when the timer has elapsed.

Le procédé qui vient d'être décrit est mis en oeuvre de préférence avec la machine automatisée de meulage de soudure en voie sur un champignon 13 de rail qui comporte le châssis principal 9 portable agencé pour être posé sur la voie et équipé de supports 10 décrivant un arc de cercle qui couvre le champignon 13 perpendiculairement à la voie. Dans la machine automatisée de meulage, la poutre 12 est supportée par le châssis 9 de façon à pouvoir tourner autour du champignon 13 par l'intermédiaire des supports 10 et se rapprocher et s'éloigner du centre de l'arc de cercle pour prendre référence sur le champignon 13 du rail et copier le profil du champignon 13 durant la rotation de la poutre 12. Le porte meule 23 est supporté par la poutre 12 de façon à pouvoir se déplacer dans une première direction perpendiculaire à la poutre 12 pour rapprocher et éloigner du centre de l'arc de cercle une meule 32 montée sur une extrémité du porte meule 23 et dans une deuxième direction parallèle à la poutre 12 pour effectuer un mouvement de balayage de la meule 32.The method which has just been described is preferably implemented with the automated welding grinding machine in track on a rail head 13 which comprises the main portable frame 9 arranged to be placed on the track and equipped with supports 10 describing an arc of a circle that covers the mushroom 13 perpendicular to the path. In the automated grinding machine, the beam 12 is supported by the frame 9 so as to be able to turn around the mushroom 13 via the supports 10 and move towards and away from the center of the arc to take reference on the mushroom 13 of the rail and copy the profile of the mushroom 13 during the rotation of the beam 12. The mill gate 23 is supported by the beam 12 of so as to be able to move in a first direction perpendicular to the beam 12 to bring a wheel 32 mounted on one end of the grinding wheel 23 closer to the center of the arc of a circle and in a second direction parallel to the beam 12 to effect a sweeping motion of the grinding wheel 32.

Claims (10)

  1. A machine for grinding track welds on a rail head (13), comprising:
    - a portable main chassis (9) arranged so as to be placed on the track and provided with at least one curved support (10) that describes an arc of circle that covers said head (13) perpendicular to the track;
    - a beam (12) connected to said curved support (10) so as to be able to rotate around the head (13) parallel to the track on the curved support (10) and able to move closer to and further from the head (13) to take reference from said head (13) so as to follow the profile of said head (13) during the rotation of the beam (12);
    - a grinding head (23) supported by the beam (12) so as to be able to move in a first direction perpendicular to the beam (12) to move a grinder (32) mounted on one end of the grinder head (23) closer to and further from the center of the arc of circle, and in a second direction parallel to the beam (12) to perform a sweeping movement of the grinder (32).
  2. The machine for grinding track welds according to claim 1, characterized in that it comprises enslavement of the position of the grinding head (22) in said first direction perpendicular to the beam (12) using a jack (33) for radial movement of the grinding head powered by a control valve (15) combined with a position sensor (35).
  3. The machine for grinding track welds according to one of the preceding claims, characterized in that the beam (12) comprises at least one copy blade (52) brought and kept in contact on a point of said head (13) for each rotational movement of the beam (12) so as to keep the same reference during the sweeping movement of the grinder (32).
  4. The machine for grinding track welds according to one of the preceding claims, characterized in that the beam (12) comprises a phonic sensor (16) for detecting that the grinder (32) is docked on the rail head.
  5. The machine for grinding track welds according to one of the preceding claims, characterized in that it comprises a jack (17) for longitudinal movement of the grinding head associated with an absolute position sensor (19) to automate the sweeping movement of the grinding head (22) with variable travel lengths.
  6. The machine for grinding track welds according to one of the preceding claims, characterized in that the beam (12) comprises a hydraulic motor (11) for rotating the grinder (32), and a pressure sensor (65) mounted on the power supply of the hydraulic motor (11) to measure the force supplied by the hydraulic motor (11).
  7. The machine for grinding track welds according to one of the preceding claims, characterized in that in the case of a hollow weld, a release movement of the grinder (32) is done automatically at the end of each sweeping travel in order to connected the ground surfaces with the rough part of the rail head (3).
  8. The machine for grinding track welds according to one of the preceding claims, characterized in that it comprises two curved supports (10) and in that the beam (12) comprises one or more straight rollers (8) at one of the ends to roll over a straight crown sector of one of the curved supports and one or more V-shaped rollers (58) at the other of the ends to roll on a V-shaped crown sector of the other of the curved supports so as to ensure guiding of the movement of the beam (12) with reduced play on the curved supports.
  9. The machine for grinding track welds according to one of the preceding claims, characterized in that it comprises a programmable automatism controller (31) arranged to control and command each movement of the beam (12) and the grinding head (23).
  10. The machine for grinding track welds according to claim 9, characterized in that the programmable automatism controller (31) comprises a memory storing data obtained from an associated portable electronic ruler for measuring straightness and an electronic processing device programmed to define sweeping positions and lengths based on applicable allowances, so as to steer a complete unfolding of the grinding cycle in an automatic mode, without human intervention.
EP10809292.5A 2009-12-29 2010-12-17 Rail profile grinder Not-in-force EP2519693B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0959649A FR2954784B1 (en) 2009-12-29 2009-12-29 RAILS PROFILE GRINDER
PCT/FR2010/052806 WO2011080463A1 (en) 2009-12-29 2010-12-17 Rail profile grinder

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EP2519693A1 EP2519693A1 (en) 2012-11-07
EP2519693B1 true EP2519693B1 (en) 2015-03-25

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EP (1) EP2519693B1 (en)
FR (1) FR2954784B1 (en)
WO (1) WO2011080463A1 (en)

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CN107175554A (en) * 2017-07-19 2017-09-19 西藏天仁科技发展有限公司 A kind of rail lip automatically grinding method
CN111660168A (en) * 2020-06-22 2020-09-15 筑岚门窗设计（杭州）有限公司 Anti-sputtering polishing device for machining hardware of building door and window

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ITVE20110025A1 (en) * 2011-04-26 2012-10-27 Fama S R L TANGENTIAL MILLING MACHINE.
DE102017208906A1 (en) * 2017-05-26 2018-11-29 Robel Bahnbaumaschinen Gmbh Rail grinding machine and method for grinding rails of a track
CN107165008A (en) * 2017-07-19 2017-09-15 西藏天仁科技发展有限公司 A kind of sander of adjustable rail lip polishing height
CN107217558A (en) * 2017-07-19 2017-09-29 西藏天仁科技发展有限公司 A kind of rail lip automatic sander
DE202018004312U1 (en) * 2018-09-17 2018-10-10 Goldschmidt Thermit Gmbh Device for reprofiling and deburring rails
CN110205883B (en) * 2019-05-27 2024-09-20 长春航泰智联科技有限公司 Full-automatic rail polishing system
NL2023916B1 (en) 2019-09-27 2021-05-27 Volkerwessels Intellectuele Eigendom Bv Local grinding of a rail

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FR2661698A1 (en) * 1990-05-03 1991-11-08 Repcorail Sarl Portable reprofiling grinder using copying of the rail
JP3383056B2 (en) * 1994-01-24 2003-03-04 川崎重工業株式会社 Rail welding automatic finishing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107175554A (en) * 2017-07-19 2017-09-19 西藏天仁科技发展有限公司 A kind of rail lip automatically grinding method
CN111660168A (en) * 2020-06-22 2020-09-15 筑岚门窗设计（杭州）有限公司 Anti-sputtering polishing device for machining hardware of building door and window

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WO2011080463A1 (en) 2011-07-07
EP2519693A1 (en) 2012-11-07
FR2954784A1 (en) 2011-07-01
FR2954784B1 (en) 2012-01-13

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