EP1757733B1 - Locally grinding a rail - Google Patents

Locally grinding a rail Download PDF

Info

Publication number
EP1757733B1
EP1757733B1 EP06017520A EP06017520A EP1757733B1 EP 1757733 B1 EP1757733 B1 EP 1757733B1 EP 06017520 A EP06017520 A EP 06017520A EP 06017520 A EP06017520 A EP 06017520A EP 1757733 B1 EP1757733 B1 EP 1757733B1
Authority
EP
European Patent Office
Prior art keywords
rail
guiding
guiding means
railway rail
processing
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.)
Active
Application number
EP06017520A
Other languages
German (de)
French (fr)
Other versions
EP1757733A1 (en
Inventor
Henrie Van Buuren
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.)
VolkerRail Nederland BV
Original Assignee
VolkerRail Nederland BV
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 VolkerRail Nederland BV filed Critical VolkerRail Nederland BV
Publication of EP1757733A1 publication Critical patent/EP1757733A1/en
Application granted granted Critical
Publication of EP1757733B1 publication Critical patent/EP1757733B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 inventor now proposes a device with which, without great skill, the rail can be ground locally, such that its desired geometry can be secured.
  • An easy to handle device is desired of limited dimension/weight, at least one order of magnitude smaller then the known train for grinding the track.
  • the device is e.g. designed as a trailer with dragging beam with coupling for connection to the dragging hook of a car or van, or is designed for transport loaded onto such trailer or a loading compartment of a lorry.
  • the device is designed according to the combination of features according to claim 1. Preferred embodiments are disclosed in claims 2-4.
  • the sensor e.g. the geometry of the rail is measured.
  • the sensor transmits its measuring data to the computer via its connection, which on the basis of said data selects and/or controls a convenient processing element, and for that runs convenient software.
  • the sensor and the processing element can follow a substantially similar movement pattern, which is e.g. first carried out by the sensor.
  • the device can be designed to process one rail at a time.
  • the device is possibly designed such that the sensors and/or processing elements can co-operate first with the one and then the other rail of a track, without the requirement to move/displace the device.
  • Said sensors and processing elements are for that e.g. located at a displaceable to the device mounted frame that can carry out a stroke aside, approximately equal to the spacing of both rails.
  • the device can be designed such that said frame can carry the sensors and processing elements external of the device.
  • the device is equipped with a double set of sensors and processing elements, one for each rail.
  • the invention also relates to a method according to claim 5.
  • a processing procedure can develop as follows: After locating the device into the track, the device is fixated, such that a reference of the device is substantially in register with the weld that is provided in the rail. Subsequently a sensor of the device is activated to determine the geometry of the rail. Then a machining head is activated. It is carried to the weld in the rail, making use of the reference of the device. The machining head is moved along the weld seam to machine it down, for which the machining head is moved from the one side of the rail, its profile following and moving to and fro across the rail towards the opposite side of the rail.
  • the head of the rail is machined with the machining head, for which the machining head is moved in lengthwise direction of the rail over a stroke (e.g. 10 cm), the centre of which approximately equals the weld in the rail.
  • a stroke e.g. 10 cm
  • the machining head is retracted and the sensor activated to measure the geometry again.
  • the grinding head is activated to move in lengthwise direction of the rail and process its head over a stroke (e.g. 60 cm) the centre of which approximately equals the weld in the rail, which stroke is larger than that of the machining head.
  • the grinding head is retracted and the sensor activated to measure the geometry again. Possibly the grinding head is activated again thereafter.
  • the machining head at least partly carries out the processing of the grinding head.
  • the desired geometry of the rail is (almost) completely automatically restored after welding, wherein the desired specifications are met.
  • the invention can e.g. be applied as a trolley with four running wheels (e.g. dual axis) in fixed orientation for stably driving across the two parallel rails of a track (e.g. one at each corner of the trolley).
  • the trolley can have a feature to offer space for an operator, e.g. a seat or standing place and/or control panel, etc.
  • the trolley can be provided with a carriage to which a rigid guiding beam (guiding means) is mounted.
  • a processing head is longitudinally of the rail displacably guided along this guiding beam, for which driving means are provided.
  • the guiding beam is in cross direction of the rail (preferably perpendicular thereto) displacably and/or rotatably/hingedly guided along a guiding rail (guiding element), for which driving means are provided.
  • the processing head is connected to a driving motor to let the processing head rotate around its axis.
  • the processing head can be designed to machine and/or grind the rail.
  • a means can be provided, e.g. by means of a revolving head, to allow selectively changing between a machining and grinding element.
  • the rotation axis of the processing element has a fixed orientation relative to the guiding beam.
  • the embodiment is such, that the grinding element is displaceable over a larger distance along the guiding beam (i.e. longitudinally of the rail) compared to the machining element.
  • the trolley is further provided with a fixation means, e.g. a clamp, to keep it temporarily stationary relative to the track.
  • the fixation means is e.g. designed to fixedly engage the rail.
  • a sensor is provided at the guiding beam, e.g. a contact block that is resiliently biased against the rail, with which the distance between the guiding beam and the rail is measured. These sensors thus provide reference points.
  • the guiding beam is provided at both ends with an adjustment element (e.g. a screw spindle) to displace the guiding beam perpendicularly relative its lengthwise direction over a relatively small distance relative to the carriage.
  • an adjustment element e.g. a screw spindle
  • the trolley can be provided with a guiding beam and processing head such as disclosed above, such that both rails can be processed simultaneously.
  • the trolley has a guiding beam and processing head as disclosed above, wherein the assembly is displaceably mounted such that when the trolley stands still, the assembly can be selectively displaced from the one towards the other rail.
  • This trolley operates as follows: First the trolley is driven across the track until the longitudinally centre of the guiding beam is located right above the weld. This weld is in the mean time processed by a shearing knife to substantially remove the flash made by the butt weld machine.
  • the guiding beam is made stationary in longitudinal direction (i.e. the trolley clamps to a rail).
  • the machining head is registered with the weld and brought in engagement therewith.
  • the guiding beam moves substantially continuously along the guiding rail such that the machining head moves crosswise relatively to the rail and follows the cross sectional perimeter of the rail such that the sides and top of the rail are processed.
  • the rotation axis of the machining head passes several orientations in a plane perpendicular to the longitudinal rail direction. In longitudinal rail direction the machining head does not displace during this operation.
  • the machining process is subsequently ended and the grinding head activated.
  • the grinding head then moves to and fro along the guiding beam to grind the rail head over a longitudinal part at both sides of the weld and thus restore the desired radius of the rail head.
  • the guiding beam is crosswise from the rail stepwise moved along the guiding rail such that the grinding head processes during one or more next strokes another part of the rail head.
  • the distance between guiding beam and rail is adjusted through the adjustment elements, depending on the signals from the sensors that function as reference points. During this, use is made of the measuring scale that is available for the relevant piece of rail.
  • the machining and grinding, with the corresponding movements of the guiding beam and processing head can be carried out computer controlled.
  • a feature is also present to automatically recognise the identity of the weld, the profile of the rail, etc.

Abstract

The invention is concerned with a device and method for processing a rail to restore its geometry after butt welding. A guiding beam is temporarily fixated longitudinally relative to the rail. A to the guiding beam mounted machining head is moved by moving the guiding means crosswise relative to the rail along a guiding track, following the rail perimeter. The a grinding head connected to the guiding beam moves to and fro longitudinally of the rail along the guiding beam while the guiding beam stepwise moves crosswise of the rail along the guiding track.

Description

  • It is known to grind the rail in the vicinity of the weld location after a welding operation is carried out for maintenance, to restore the desired geometry of the rail, in particular its head. Great skill is required for it. In many cases, one seems incapable to give the rail the desired geometry.
  • It is also known to simultaneously grind both rails of a track across a substantial length. Then, one is always capable the give the rail the desired geometry.
  • Document DE 200 04 932 U1 , the most pertinent prior art document for this invention, discloses a device to grind rails as disclosed in the preamble of claim 1.
  • The inventor now proposes a device with which, without great skill, the rail can be ground locally, such that its desired geometry can be secured.
  • An easy to handle device is desired of limited dimension/weight, at least one order of magnitude smaller then the known train for grinding the track. The device is e.g. designed as a trailer with dragging beam with coupling for connection to the dragging hook of a car or van, or is designed for transport loaded onto such trailer or a loading compartment of a lorry.
  • The device is designed according to the combination of features according to claim 1. Preferred embodiments are disclosed in claims 2-4.
  • With the sensor e.g. the geometry of the rail is measured. The sensor transmits its measuring data to the computer via its connection, which on the basis of said data selects and/or controls a convenient processing element, and for that runs convenient software.
  • The sensor and the processing element can follow a substantially similar movement pattern, which is e.g. first carried out by the sensor.
  • The device can be designed to process one rail at a time. The device is possibly designed such that the sensors and/or processing elements can co-operate first with the one and then the other rail of a track, without the requirement to move/displace the device. Said sensors and processing elements are for that e.g. located at a displaceable to the device mounted frame that can carry out a stroke aside, approximately equal to the spacing of both rails. The device can be designed such that said frame can carry the sensors and processing elements external of the device. Alternatively the device is equipped with a double set of sensors and processing elements, one for each rail.
  • The invention also relates to a method according to claim 5.
  • A processing procedure can develop as follows: After locating the device into the track, the device is fixated, such that a reference of the device is substantially in register with the weld that is provided in the rail. Subsequently a sensor of the device is activated to determine the geometry of the rail. Then a machining head is activated. It is carried to the weld in the rail, making use of the reference of the device. The machining head is moved along the weld seam to machine it down, for which the machining head is moved from the one side of the rail, its profile following and moving to and fro across the rail towards the opposite side of the rail. Subsequently the head of the rail is machined with the machining head, for which the machining head is moved in lengthwise direction of the rail over a stroke (e.g. 10 cm), the centre of which approximately equals the weld in the rail. Thereafter the machining head is retracted and the sensor activated to measure the geometry again. The grinding head is activated to move in lengthwise direction of the rail and process its head over a stroke (e.g. 60 cm) the centre of which approximately equals the weld in the rail, which stroke is larger than that of the machining head. Then the grinding head is retracted and the sensor activated to measure the geometry again. Possibly the grinding head is activated again thereafter.
  • During the action of the machining or grinding head, it is displaced such that a thicker or thinner layer of the rail is removed, depending on the measurement of the sensor.
  • Alternatives for the processing procedures as disclosed here are also feasible, as long as they are covered by claim 5. E.g. the machining head at least partly carries out the processing of the grinding head.
  • With the invention the desired geometry of the rail is (almost) completely automatically restored after welding, wherein the desired specifications are met.
  • The invention can e.g. be applied as a trolley with four running wheels (e.g. dual axis) in fixed orientation for stably driving across the two parallel rails of a track (e.g. one at each corner of the trolley). The trolley can have a feature to offer space for an operator, e.g. a seat or standing place and/or control panel, etc.
  • The trolley can be provided with a carriage to which a rigid guiding beam (guiding means) is mounted. A processing head is longitudinally of the rail displacably guided along this guiding beam, for which driving means are provided. In turn the guiding beam is in cross direction of the rail (preferably perpendicular thereto) displacably and/or rotatably/hingedly guided along a guiding rail (guiding element), for which driving means are provided.
  • The processing head is connected to a driving motor to let the processing head rotate around its axis. The processing head can be designed to machine and/or grind the rail. A means can be provided, e.g. by means of a revolving head, to allow selectively changing between a machining and grinding element.
  • The rotation axis of the processing element has a fixed orientation relative to the guiding beam.
  • The embodiment is such, that the grinding element is displaceable over a larger distance along the guiding beam (i.e. longitudinally of the rail) compared to the machining element.
  • The trolley is further provided with a fixation means, e.g. a clamp, to keep it temporarily stationary relative to the track. The fixation means is e.g. designed to fixedly engage the rail.
  • Near both longitudinal ends a sensor is provided at the guiding beam, e.g. a contact block that is resiliently biased against the rail, with which the distance between the guiding beam and the rail is measured. These sensors thus provide reference points.
  • To be able to adjust the distance between the guiding beam and the rail, the guiding beam is provided at both ends with an adjustment element (e.g. a screw spindle) to displace the guiding beam perpendicularly relative its lengthwise direction over a relatively small distance relative to the carriage.
  • At both its ends the trolley can be provided with a guiding beam and processing head such as disclosed above, such that both rails can be processed simultaneously. According to a further alternative the trolley has a guiding beam and processing head as disclosed above, wherein the assembly is displaceably mounted such that when the trolley stands still, the assembly can be selectively displaced from the one towards the other rail.
  • This trolley operates as follows: First the trolley is driven across the track until the longitudinally centre of the guiding beam is located right above the weld. This weld is in the mean time processed by a shearing knife to substantially remove the flash made by the butt weld machine.
  • Then the guiding beam is made stationary in longitudinal direction (i.e. the trolley clamps to a rail). The machining head is registered with the weld and brought in engagement therewith. During machining the guiding beam moves substantially continuously along the guiding rail such that the machining head moves crosswise relatively to the rail and follows the cross sectional perimeter of the rail such that the sides and top of the rail are processed. The rotation axis of the machining head passes several orientations in a plane perpendicular to the longitudinal rail direction. In longitudinal rail direction the machining head does not displace during this operation.
  • The machining process is subsequently ended and the grinding head activated. The grinding head then moves to and fro along the guiding beam to grind the rail head over a longitudinal part at both sides of the weld and thus restore the desired radius of the rail head. During this, the guiding beam is crosswise from the rail stepwise moved along the guiding rail such that the grinding head processes during one or more next strokes another part of the rail head. During grinding the distance between guiding beam and rail is adjusted through the adjustment elements, depending on the signals from the sensors that function as reference points. During this, use is made of the measuring scale that is available for the relevant piece of rail.
  • The machining and grinding, with the corresponding movements of the guiding beam and processing head, can be carried out computer controlled. E.g. a feature is also present to automatically recognise the identity of the weld, the profile of the rail, etc.
  • Other embodiments also belong to the invention.

Claims (6)

  1. Device for in situ locally processing a railway rail after a butt welding operation to restore the desired geometry, provided with the following features: energy source, such as accumulator, driving unit; computer; one or more sensors; two processing elements, namely a machining head and a grinding head that are designed to remove material from the surface of the railway rail; displacement means to displace said processing elements; fixation means to temporarily fixate the device relative to the railway rail, and designed such that with the sensors and processing elements a railway rail length can be covered, not longer than 200 cm, more preferably 100 cm, without moving/displacing the device, and
    characterised in that
    the device is designed such that said processing elements are mounted displacable to the device, for which the device has a guiding element and driving element for the processing elements, which guiding element is a rigid guiding means along which a processing head in lengthwise direction of the railway rail is displacably guided while the guiding means in crosswise direction of the railway rail is displacably and/or rotatably/hingedly guided along a fixedly mounted guiding rail, wherein the rotation axis of the processing elements has a fixed orientation relative to the guiding means.
  2. Device according to claim 1, wherein near an end a sensor is provided at the guiding means with which the distance between guiding means and railway rail can be measured.
  3. Device according to claim 1 or 2, wherein, to adjust the distance between the guiding means and the railway rail, the guiding means is provided with an adjustment element at the end.
  4. Device according to any of the preceding claims, wherein the grinding head can be displaced over a larger distance along the guiding means compared to the machining head.
  5. Method for processing a railway rail with the device according to any of claims 1-4, wherein the guiding means is temporarily fixated longitudinally relative to the railway rail by temporary fixating the device by the fixation means and a to the guiding means mounted first processing element is moved by moving the guiding means crosswise relative to the railway rail along said fixedly mounted guiding rail and then a second processing element connected to the guiding means moves to and fro longitudinally of the railway rail along the guiding means while the guiding means stepwise moves crosswise of the railway rail along the fixedly mounted guiding rail.
  6. Method according to claim 5, wherein the distance between the guiding means and the railway rail is changed by the adjustment element.
EP06017520A 2005-08-24 2006-08-23 Locally grinding a rail Active EP1757733B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1029790 2005-08-24

Publications (2)

Publication Number Publication Date
EP1757733A1 EP1757733A1 (en) 2007-02-28
EP1757733B1 true EP1757733B1 (en) 2010-01-27

Family

ID=37434214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06017520A Active EP1757733B1 (en) 2005-08-24 2006-08-23 Locally grinding a rail

Country Status (3)

Country Link
EP (1) EP1757733B1 (en)
AT (1) ATE456703T1 (en)
DE (1) DE602006011988D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2023916B1 (en) * 2019-09-27 2021-05-27 Volkerwessels Intellectuele Eigendom Bv Local grinding of a rail

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE505669C2 (en) * 1992-08-19 1997-09-29 Goeteborgs Spaarvaegar Ab Rail Grinding Vehicles
FR2712901B1 (en) * 1993-11-24 1996-05-31 Geismar Anc Ets L Machine for grinding rails of a railway track.
DE19518457A1 (en) * 1995-05-19 1996-11-21 Robel Georg Gmbh & Co Device for grinding rails
ES2142566T3 (en) * 1996-10-11 2000-04-16 Scheuchzer Sa WELDING PROCEDURE OF AT LEAST ONE SECTION OF RAIL AND MACHINE FOR THE PERFORMANCE OF THE PROCEDURE.
DE19819990C2 (en) * 1998-05-05 2000-05-11 Elaugen Gmbh Schweis Und Schle Rail grinding device
DE20004932U1 (en) 2000-03-17 2001-07-26 Partech Produktionsekonomi Ab Device for grinding rails

Also Published As

Publication number Publication date
DE602006011988D1 (en) 2010-03-18
EP1757733A1 (en) 2007-02-28
ATE456703T1 (en) 2010-02-15

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