WO2011072762A1 - Procédé et dispositif de profilage d'une géométrie d'éléments de rail - Google Patents

Procédé et dispositif de profilage d'une géométrie d'éléments de rail Download PDF

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Publication number
WO2011072762A1
WO2011072762A1 PCT/EP2010/005760 EP2010005760W WO2011072762A1 WO 2011072762 A1 WO2011072762 A1 WO 2011072762A1 EP 2010005760 W EP2010005760 W EP 2010005760W WO 2011072762 A1 WO2011072762 A1 WO 2011072762A1
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WO
WIPO (PCT)
Prior art keywords
track component
trajectory
track
wheel
data processing
Prior art date
Application number
PCT/EP2010/005760
Other languages
German (de)
English (en)
Inventor
Dirk Nicklisch
Volkmar Sauer
Andreas Martin
Original Assignee
Db Netz Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Db Netz Ag filed Critical Db Netz Ag
Publication of WO2011072762A1 publication Critical patent/WO2011072762A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
    • B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
    • B61K9/08—Measuring installations for surveying permanent way
    • 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

Definitions

  • the invention relates to a method and a device for profiling a geometry of track components of rail traffic routes in an area in which these track components are touched by wheels of rail vehicles, a so-called overflow geometry.
  • a check of the overflow geometry in a turnout only includes a test and assessment of a frog ramp and a frog tip using simple measuring means (ruler, measuring wedge or measuring point probe).
  • measuring point probes, rulers and heart gauge gauges are used.
  • a height difference between the top edge of the frog and a wing rail in a cross section "L1", a theoretical wheel overflow, and "L” is measured by means of a heart gauge.
  • the track component is reworked by build-up welding and subsequent grinding.
  • DE 10 2004 016 828 A1 discloses a method for testing and assessing a geometry of track components of rail traffic routes, in which the spatial course of the trajectory of a wheel provided with a reference wheel profile is determined directly or indirectly during the rolling over of the respective track component in a spatially fixed coordinate system and subsequently be assessed in terms of its dynamic impact.
  • the advantage here is that the validity of the examination of the geometric state by the determination of the vertical movement of a component rolling over the wheel in a spatially fixed coordinate system and their subsequent computer-aided evaluation is significantly improved and objectified.
  • a high measurement accuracy is achieved with a high measurement speed.
  • the entire area of the design-related lowering and subsequent lifting of the wheel (wing rail bend to K point) is continuously recorded and assessed.
  • the method it is also possible to determine the effects of the cross profile wear of wing rail and / or frog on the wheel overflow.
  • DE 10 2004 017 746 B4 discloses a method and a device for detecting the condition and for processing switches in track systems.
  • a three-dimensional profile image of the overflow area of a switch frog piece is created with the aid of a measuring system and a scanner unit, as well as gauge, elevation, connection, groove width, longitudinal and directional arrow heights.
  • the actual profile data is sent to a data processing system and analyzed.
  • desired profile data for the geometric description of the switch frog are generated. These desired profile data are delivered together with the actual profile data to a processing unit, which reworks the points frog piece especially with grinding technology.
  • the process is very complex, since a complete three-dimensional profile image of the actual state is created with a high measurement and computational effort.
  • the subsequent processing of the track system is very complex, since in turn a three-dimensional target profile must be incorporated into the track system, preferably by consuming grinding.
  • the two-dimensional course of the trajectory of a provided with a Referenzradprofil wheel or measuring roller when rolling over the respective track component in a spatially fixed coordinate system is determined and evaluated using a data processing system in terms of its dynamic effects.
  • the advantage here is that the validity of the examination of the geometric state by the inventive determination of the vertical movement of a component rolling over the wheel in a spatially fixed coordinate system and their subsequent computer-aided evaluation is highly accurate and objek- tive.
  • the entire area of the design-related lowering and subsequent lifting of the wheel (wing rail bend to K point) is continuously recorded and assessed.
  • intervention thresholds for the repair must be specified for these variables.
  • the concrete definition of intervention thresholds is influenced by numerous constraints and must be based on a technical and economic analysis by the infrastructure manager.
  • the frame parameters used in particular are the load-bearing capacity of the material to be processed and the speed with which rail vehicles pass over the trackside to be processed.
  • the data processing system analyzes the possibilities of optimizing the profile of the track system, which led to the measured actual trajectory of a reference wheel profile, using a material-removing machining tool.
  • a data processing system determines the tolerance ranges for the slope and the curvature of the Radabsenkungskurve.
  • the data processing system is equipped with software with which it calculates a desired trajectory curve for a wheel profile which is equivalent to the reference wheel profile and which lies within the previously determined tolerance ranges.
  • the goal is to ensure a long service life of the machined area by minimizing material removal. Since each track component is subject to different loads and i.a. has its own characteristic Radabsenkungskurve, this is done individually for each measured track component.
  • a material-removing machining tool uses this data to process the track component, preferably fully automatically, in such a way that a wheel profile that corresponds to the reference wheel profile on the track component describes a trajectory that corresponds to the desired trajectory.
  • Claim 2 includes an apparatus for implementing the method of claim 1.
  • a wheel provided with a reference wheel profile or a measuring roller determines the two-dimensional course of the trajectory in a spatially fixed coordinate system when the track component rolls over.
  • a data processing system records the measured values and evaluates them with regard to their dynamic effects.
  • the advantage here is that the validity of the test of the geometric state by the inventive determination of the vertical movement of a nes the wheel rolling over the component in a spatially fixed coordinate system and their subsequent computer-aided evaluation are highly accurate and objective.
  • the entire area of the design-related lowering and subsequent lifting of the wheel (wing rail bend to K point) is continuously recorded and assessed.
  • intervention thresholds for the repair are specified in the data processing system for these variables.
  • the concrete determination of the intervention thresholds is influenced by numerous boundary conditions and is based on a technical and economic analysis by the infrastructure manager.
  • the data processing system analyzes the possibilities of optimizing the profile of the track system, which led to the measured actual trajectory of a reference wheel profile, using a material-removing machining tool.
  • a material-removing machining tool serve in particular the strength of the material to be processed and the speed with which rail vehicles run over the track system to be processed.
  • the data processing system determines the tolerance ranges for the slope and the curvature of the Radabsenkungskurve.
  • the data processing system calculates a desired trajectory curve for a wheel profile which equals the reference wheel profile and which lies within the previously determined tolerance ranges. Furthermore, the smoothest possible transition between the machined and unprocessed section of the track component must be ensured.
  • the device contains, in addition to the measuring device, which determines the course of a trajectory of a wheel provided with a reference wheel profile when rolling over the respective track component in a spatially fixed coordinate system, nor a material removing machining tool which is shaped so that it in the preferably fully automated processing of the track component, the material in the form of a given profile ab supportive.
  • the method and the device are thereby independent of the detailed profile structure of the track component, since only the interaction between the reference wheel profile and the track component plays a role. It is therefore not necessary to determine the actual profile of the track component exactly.
  • the material-removing part of the machining tool is such that it automatically incorporates a profile matching the desired shape of the selected reference wheel profile into the track component, it must only be guided over the track component in accordance with the determined target trajectory of the reference wheel profile.
  • This is achieved by guiding the machining tool over the track component within a base unit serving as a reference frame in a spatially fixed coordinate system in such a way that it follows the determined target trajectory during the material-removing machining.
  • the spatially fixed coordinate system is preferably the same as that used during the measurement of the actual trajectory. For this purpose, it is advantageous to install both the measuring device and the material-removing machining tool in a common frame of reference. But it is also possible to use the measuring device and the machining tool independently.
  • the data processing system must perform a coordinate transformation between the measurement and the machining coordinate system.
  • reference points outside the measuring and routing device must be defined and measured.
  • the machining tool is a milling machine. It has the advantage over grinding machines that the milling head can be selected in a form that already corresponds to the desired profile for the track component. In addition, the surface of the machined track component is more level than after the grinding process.
  • the milling machine must be so flexible in its degrees of freedom that it is ensured that the milling head of the spatial trajectory, which is given by the target trajectory, can follow exactly. Ideally, the milling machine is aligned so that the milling head must be deflected only vertically during its feed motion.
  • Fig. 1 shows schematically a method for assessing the overflow geometry of a switch by means of a measuring roller in plan view; if the measuring roller is replaced by the similar-looking milling head, the figure also applies as a schematic representation of the milling process.
  • FIG. 2 schematically shows the measuring roller on the track component to be processed as a vertical sectional image.
  • FIG. 3 shows, by way of example, a measured course of a wheel depression in the case of a worn center piece (solid line), together with a calculated setpoint trajectory (dashed line).
  • a particularly advantageous embodiment relates to a direct mechanical scanning of the geometry of the track during the measuring process.
  • a measuring roll 1 which is vertically and horizontally movable in a plane parallel to the track plane is guided with the shape of the reference wheel profile over the region of the possible vertical depression 3, for example in the overflow region of a switch frog piece.
  • the trajectory that is to say the lowering curve of the measuring roller 1 over the rolling path 4, is continuously recorded (see FIG. 3, solid line 9) and subsequently evaluated with the aid of an evaluation software in a data processing system.
  • the measuring base 2 serves as a reference for a spatially fixed three-dimensional coordinate system within which the trajectory 9 is described.
  • a software in a data processing system now analyzes whether it is necessary and, if so, whether it is possible to optimize the overflow area of the switch by material removal within predetermined tolerances 1 1. If, for example, there is too great a curvature 16 of the Radabsenkungskveve at its lowest point (see Figure 3), so much material must be removed right and left of this point that the curvature 15 comes to rest within a tolerance range 13.
  • the slope of the curve 13, or 14 left and right of the lowest point is also to be considered. So that a wheel does not lose contact with the track component during the crossing, the gradient 13 must not be too pronounced in the sloping area. Similarly, on the right side of the curve, in the rising area, the slope 13 may also not be too strong, otherwise the dynamic load of the track component in the crossing of a train is too high.
  • the desired trajectory curve 12 must be designed so that a tangential connection 10 is ensured to the existing trajectory 9.
  • a milling head 1 whose shape is chosen to match the desired reference wheel profile is followed by the machining tool following the optimized nominal trajectory 12 , guided over the overflow area of the switch. Wherever the milling head meets the track, it carries material accordingly, so that after the machining process, a wheel with the corresponding wheel profile according to the desired trajectory 12 passes over the overflow area of the point.
  • the evaluation software in the data processing system calculates that, for example because of advanced wear, is not possible to produce by material removal a tolerable target trajectory, the track component would have to be prepared by welding a coating before further processing. For this purpose, the software calculates at which point of the switch how much material must be welded onto the track component. After welding, the process is repeated as described above.
  • a second embodiment relates to the case that the coordinate systems of the measuring base do not necessarily coincide with the coordinate system of the machining tool.
  • the position of the coordinate systems relative to one another must be specified in a common spatially fixed frame of reference. This can be ensured, for example, by a measuring frame aligned parallel to the track plane.
  • the solid spatial reference can be produced, for example, by combining the profile measuring technique or the machining tool, in each case with an inertial system (gyro platform). The position of the moving measuring system or machining tool in space is continuously determined and recorded. This information ensures that the two coordinate systems can be correctly transformed into each other.

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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)

Abstract

L'invention concerne un procédé et un dispositif de profilage d'une géométrie d'éléments de rail de voies ferrées dans une zone dans laquelle les éléments de rail sont touchés par des roues de véhicules ferroviaires, une géométrie dite de surface de roulement. Un système de mesure détermine le tracé d'une trajectoire d'une roue pourvue d'un profil de référence lorsqu'elle roule sur l'élément de rail concerné dans un système de coordonnées spatiales fixe. L'élément de rail est évalué pour ce qui est de ses effets dynamiques à l'aide d'un système de traitement de données. Un système de traitement de données détermine, sur la base de la trajectoire déterminée, une trajectoire théorique optimisée qui peut être obtenue dans le cadre de l'enlèvement tolérable de matériau de l'élément de rail. Un outil d'usinage par enlèvement de matériau, qui est formé de manière à enlever le matériau dans une forme adaptée au profil de roue prédéfini lors de l'usinage de l'élément de rail, usine ensuite l'élément de rail le long de la trajectoire théorique déterminée.
PCT/EP2010/005760 2009-12-15 2010-09-21 Procédé et dispositif de profilage d'une géométrie d'éléments de rail WO2011072762A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009058190A DE102009058190A1 (de) 2009-12-15 2009-12-15 Verfahren und Vorrichtung zur Profilierung einer Überlaufgeometrie von Gleisbauteilen
DE102009058190.1 2009-12-15

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Publication Number Publication Date
WO2011072762A1 true WO2011072762A1 (fr) 2011-06-23

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DE (1) DE102009058190A1 (fr)
WO (1) WO2011072762A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013064942A1 (fr) * 2011-11-03 2013-05-10 Rte Technologie Gmbh Dispositif de mesure
CN112975284A (zh) * 2021-02-20 2021-06-18 中国铁建重工集团股份有限公司道岔分公司 一种异型轨的制造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0739685A2 (fr) * 1989-01-11 1996-10-30 Loram Maintenance Of Way, Inc. Mesurer et maintenir le profil d'un rail de chemin de fer
DE102004016828A1 (de) 2004-04-01 2005-10-27 Deutsche Bahn Ag Verfahren zur Prüfung und Beurteilung einer Überlaufgeometrie von Gleisbauteilen
DE102004017746B4 (de) 2004-04-06 2006-02-02 Witt Industrie Elektronik Gmbh Verfahren und Vorrichtung zur Erfassung des Zustandes und zur Bearbeitung von Weichen in Gleisanlagen
EP2071078A1 (fr) 2007-12-12 2009-06-17 Laurent Goer Dispositif et procédé destiné à traiter des rails, notamment des rails à gorge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0739685A2 (fr) * 1989-01-11 1996-10-30 Loram Maintenance Of Way, Inc. Mesurer et maintenir le profil d'un rail de chemin de fer
DE102004016828A1 (de) 2004-04-01 2005-10-27 Deutsche Bahn Ag Verfahren zur Prüfung und Beurteilung einer Überlaufgeometrie von Gleisbauteilen
DE102004017746B4 (de) 2004-04-06 2006-02-02 Witt Industrie Elektronik Gmbh Verfahren und Vorrichtung zur Erfassung des Zustandes und zur Bearbeitung von Weichen in Gleisanlagen
EP2071078A1 (fr) 2007-12-12 2009-06-17 Laurent Goer Dispositif et procédé destiné à traiter des rails, notamment des rails à gorge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013064942A1 (fr) * 2011-11-03 2013-05-10 Rte Technologie Gmbh Dispositif de mesure
CN112975284A (zh) * 2021-02-20 2021-06-18 中国铁建重工集团股份有限公司道岔分公司 一种异型轨的制造方法

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Publication number Publication date
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