EP2390415A1 - Agencement de pierre à aiguiser doté d'un moment et d'une force résultants minimisés - Google Patents

Agencement de pierre à aiguiser doté d'un moment et d'une force résultants minimisés Download PDF

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Publication number
EP2390415A1
EP2390415A1 EP10164382A EP10164382A EP2390415A1 EP 2390415 A1 EP2390415 A1 EP 2390415A1 EP 10164382 A EP10164382 A EP 10164382A EP 10164382 A EP10164382 A EP 10164382A EP 2390415 A1 EP2390415 A1 EP 2390415A1
Authority
EP
European Patent Office
Prior art keywords
grinding
rail
longitudinal direction
rotation
acute angle
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.)
Granted
Application number
EP10164382A
Other languages
German (de)
English (en)
Other versions
EP2390415B1 (fr
Inventor
Lorenzo Termite
Lars Grüner
Konstantin Diest v.
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.)
Vossloh High Speed Grinding GmbH
Original Assignee
Vossloh High Speed Grinding GmbH
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 Vossloh High Speed Grinding GmbH filed Critical Vossloh High Speed Grinding GmbH
Priority to EP20100164382 priority Critical patent/EP2390415B1/fr
Publication of EP2390415A1 publication Critical patent/EP2390415A1/fr
Application granted granted Critical
Publication of EP2390415B1 publication Critical patent/EP2390415B1/fr
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Anticipated expiration legal-status Critical

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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

Definitions

  • the present invention relates to a device for machining the running surfaces of rails by peripheral grinding with at least one adjustable to the running surface of the rail and movable along the rail grinding frame, which has at least three each freely rotatably mounted grinding wheels for peripheral grinding with an acute angle to the rail longitudinal direction enclosing axis of rotation ,
  • a recently put into practice, new grinding method is the grinding with passively driven grinding wheels, such as in a method with the features of the preamble of claim 1 revealing EP 0 708 205 A1 is described.
  • rotatably mounted on an axis (rotation axis) peripheral grinding are pulled under a twisted about the vertical axis angle of usually 40 ° - 60 ° without its own drive on the rail, they begin to rotate. Due to the inclination takes place between the peripheral surface of the grinding wheel and the rail surface, a relative movement, which triggers a decision of the rail with increasing towing speed.
  • the rail grinding usually takes place at 80 km / h, the power for the drive of the grinding body comes from the traction power alone.
  • the grinding wheels are arranged in the frame of this grinding process device in which they can be raised or lowered and pressed. They are usually not arranged individually but in groups one behind the other, so that such a group is moved together. This is for example in the Fig. 5 the already mentioned EP 0 708 205 A1 shown. There are shown in the apparatus two racks, each with five in the same way inclined grinding wheels.
  • the guide would have to be designed to both statically absorb the lateral forces and prevent derailment, as well as dynamic periodic running and retraction due to elasticities in the structure or track changes or other disorders with the result of uneven grinding pattern and in the worst case of a wavy rail surface to avoid.
  • the basic idea on which the present invention is based is that, unlike the arrangement of the grinding wheels in a grinding rack, as known in the art, for example in the FIG. 5 of the EP 0 708 205 A1 shown to make the grinding in a frame not all in a same direction with its axis of rotation relative to the longitudinal direction of the rail to be machined, but here to work with angles of different sign and thus to obtain at the different stones transverse forces in different directions transverse to the Rail can point.
  • the transverse forces occurring at the individual grinding bodies compensate each other, ie that the vector sum of the individual transverse forces acting on the grinding bodies is substantially zero.
  • the occurrence of a resultant lateral force on the buff is prevented altogether at first.
  • An essential part of the invention is then also that a resulting torque around the vertical axis avoided, so the sum of all acting on the individual grinding wheels torques is also zero.
  • a non-zero torque which may also be referred to as a yaw moment, causes the arrangement of the grinding frame to yaw, that is, to rotate about its vertical axis.
  • a torque will occur due to the distribution of forces relative to a pivot point. which seeks to effect a rotation of the grinding rack about a rotational axis perpendicular to the longitudinal direction of the grinding rack and passing through the pivot point.
  • Another condition for an inventive arrangement of the grinding in the grinding rack is now that they are arranged distributed in their distance from such a fulcrum that on both sides of this fulcrum an equal in magnitude, but in the opposite sign torque is obtained. In other words, the sum of the products of the distance of a point of force application to a grinding wheel and the force applied to this grinding wheel is equal to zero for all grinding wheels.
  • a negative acute angle is correspondingly at an angle given by the same consideration by an acute angle in the clockwise direction, the relevant grinding body then wants to run to the left of the rail.
  • transverse forces to both directions of the rail can be achieved by selecting the setting angle or choice of geometry of the grinding body or by both measures can be set so that the forces acting on all abrasive forces neutralize in a vector addition, that are zero.
  • a e.g. Arranged under a positive acute angle abrasive body which applies a double transverse force as two more arranged in front of and behind this abrasive body grinding with set at a negative acute angle to the rail longitudinal axis of rotation. If these abrasive bodies are each arranged equidistant from the central abrasive body so that in operation they apply a transverse load of half the lateral force in the opposite direction to the transverse force of the central abrasive body, the condition of force and torque freedom is fulfilled.
  • the device comprises four grinding wheels or grinding wheels in a number of a multiple of four, which are arranged in the grinding rack along an imaginary line one behind the other.
  • the arrangement is designed so that, starting from a center located on the line on both sides thereof has the same number of grinding wheels.
  • the abrasive bodies are arranged so that in each case an abrasive body of the same type is arranged to both directions of the center at the same distance, that the axes of rotation of the same distance to the center of the abrasive body with the rail longitudinal direction include the same acute angle.
  • here is distributed symmetrically around the center in the arrangement of the abrasive body in each case to identify a pair of grinding wheels, which is located at the same distance from the center on the imaginary line on both sides of the center, each with an abrasive body.
  • These grinding wheels are provided with the same orientation, ie acute angles of the same magnitude and sign.
  • the center in such an arrangement simultaneously forms the fulcrum, so that due to the same orientation of the grinding bodies, which are arranged at the same distance from the center, the requirement of neutralizing torques is given. Together with the above condition then results in a substantially torque and force-free arrangement of the abrasive body with a comparatively simple structural design.
  • the device is particularly simple and compact to build, if all the abrasive bodies in the grinding rack are of the same type. In particular, this results in a particularly simple determination or estimation of the occurring shear forces, since they are the same size in grinding wheels of the same type and magnitude equal selected angle of attack. Thus, then only the number of arranged under positive and negative acute angle abrasive must be compensated and provided for a corresponding torque compensation.
  • the grinding bodies be arranged in the grinding frame in such a way that grinding wheels which enclose with their axis of rotation to the rail longitudinal direction an acute angle of a first sign (for example positive) for the processing of the one edge, eg.
  • the outer edge of the rail may be used, whereas those which have the opposite sign of the acute angle between their axis of rotation and the rail longitudinal direction (eg, a negative acute angle) may be used for machining the other edge (e.g. Outer edge) are arranged.
  • the abrasive bodies with the centers of their axes of rotation may not be exactly aligned, are within the meaning of the invention, in particular in the sense of the above-described arrangement according to claim 3 and all claims back referring nevertheless on a line.
  • the slight offset of the centers of the axes of rotation of a thought drawn line to the right or left here changes nothing.
  • the device may comprise a self-propelled vehicle with a chassis on which the at least one grinding rack is arranged.
  • grinding frames e.g. are arranged on the chassis of a not self-propelled, towed vehicle.
  • At least two grinding racks are arranged so that at least one grinding rack is provided for each of the rails running in a track.
  • processing of a rail in a row two or even more grinding racks with abrasive bodies can arrange, for example, to obtain a higher material removal or to order with different Schleif redesignan für extracten in the individual Grinding racks to grind different area of the rail surface. This can be done, for example, with grinding bodies in a first grinding rack, which grind only the driving surface.
  • grinding wheels in another grinding rack the grinding of one or both edges of the rail head (the inner edge or outer edge) can be performed.
  • FIG. 1 is initially in a representation according to the FIG. 5 of the EP 07 082 005 A1 a section of a device for machining the running surfaces of rails by peripheral grinding by means of oblique position due to the resulting frictional force driven during driving abrasive body shown.
  • this method which is also the embodiment of the invention is based on the EP 07 082 005 A1 and the presentation given there, which - insofar as nothing else is described below - also applies to the inventive development validity.
  • FIG. 1 The prior art apparatus shown are arranged on a chassis 1, which is connected to wheels 2, which roll along a rail 3, a total of two grinding racks 4.
  • rotating grinding wheels 6 are arranged freely rotatable on axes of rotation, here five grinding wheels per grinding rack 4.
  • the arrangement of the grinding wheels 6 is such that the rotational axes 5 form an acute angle to the longitudinal extent of the rail 3.
  • the grinding racks 4 are arranged vertically adjustable on the chassis 1 of the device, so that they can be lowered and placed on the rail 3, so that as shown for the left in the figure grinding frame 4, the grinding wheel 6 with a peripheral surface 7 on a tread 8 of the rail 3 abut.
  • the sanding frame 4 is shown in a raised state.
  • the grinding frame 4 is applied with suitable, unspecified means here, directed against the tread 8 pressing force to press the grinding wheel 6 against the tread 8 of the rail 3.
  • FIG. 2 illustrated in a schematic representation of a single abrasive body 6, wherein the various forces occurring are shown here.
  • an abrasive body 6 which encloses with its axis of rotation 5 an acute angle of the amount ⁇ to the rail longitudinal direction L, said angle ⁇ lies in an imaginary quadrant seen in the direction of travel speed v to the right of the rail 3 and before an intersection point S. the axis of rotation 5 with the rail longitudinal direction L is located.
  • a negative angle - ⁇ For further consideration and comparison of the different angles of attack, such an angle should be referred to here as a negative angle - ⁇ .
  • FIG. 3 is schematically shown a preliminary stage of the consideration on the way to an arrangement according to the invention.
  • two grinding wheels 6 of the same design are arranged, which are aligned with their axes of rotation 5 under equal acute angles ⁇ to the rail longitudinal direction L, wherein the acute angle ⁇ but are seen in different quadrants in the direction of the propulsion speed v.
  • the grinding wheels 6 have in this arrangement to each other (more precisely in the distance of the intersections S of the axes of rotation 5 with the rail longitudinal direction L adjacent grinding wheels 6) each at an equal distance and are distributed so that right and left of an imaginary center P of the arrangement in each case in the same Distance to this center P each one grinding wheel 6 with a positive acute angle + ⁇ or one grinding wheel 6 with a negative acute angle - ⁇ is present.
  • the grinding wheels 6 can be accommodated and arranged in a grinding rack 4, without a resulting lateral force F Qres occurs and without a torque M acts on the grinding rack .
  • the grinding rack can be carried out accordingly with less structural complexity are higher working speeds v allows, and the risk of dodging or tilting of the arrangement of the grinding wheel 6 and this holding in the arrangement Abrasive 4 with the negative consequences for the grinding pattern and the possible risk of an abrasive breakage are avoided.
  • FIG. 5 is shown in a further schematic representation of a way to provide more abrasive assemblies with more than four, namely a multiple of four grinding wheels 6.
  • grinding wheels 6 of the same type are arranged under equal acute angles ⁇ between the rail longitudinal direction L and their axes of rotation.
  • a first group of grinding wheels 6 is provided with their above-described distances to a center P on both sides symmetrically in the center of the arrangement, this group has grinding wheels 6 in a number 2n, where n is a natural number.
  • a group of grinding wheels 6 are arranged in an alignment at an acute angle with signs different from the acute angles of the first group, each in a number n, where n is a natural number.
  • the positions of these grinding wheels 6 are distributed symmetrically to the center point P.
  • a resulting transverse force F Qres of zero and a likewise omitted resulting torque M if this arrangement is summarized in a grinding rack.
  • FIG. 6 is in an even more schematic representation (here are only the axes of rotation 5 of the abrasive 6 shown) another possible arrangement of abrasive in a grinding rack shown, in which case abrasive of the same type with the same amount acute angles ⁇ with different Signs are arranged in a row one behind the other so that the resulting lateral force F Qres is also zero as the torque M.
  • the other Abrasive bodies are then distributed at the same distance A from this first grinding body or the other grinding bodies in the rail longitudinal direction L in front of and behind the pivot point D.
EP20100164382 2010-05-28 2010-05-28 Agencement de pierre à aiguiser doté d'un moment et d'une force résultants minimisés Active EP2390415B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20100164382 EP2390415B1 (fr) 2010-05-28 2010-05-28 Agencement de pierre à aiguiser doté d'un moment et d'une force résultants minimisés

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100164382 EP2390415B1 (fr) 2010-05-28 2010-05-28 Agencement de pierre à aiguiser doté d'un moment et d'une force résultants minimisés

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EP2390415A1 true EP2390415A1 (fr) 2011-11-30
EP2390415B1 EP2390415B1 (fr) 2015-04-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3779045A1 (fr) 2019-08-13 2021-02-17 Plasser & Theurer Export Von Bahnbaumaschinen Gesellschaft m.b.H. Dispositif et procédé d'usinage de la surface d'une tête d'un rail par affûtage de surface

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2759298C1 (ru) * 2021-02-12 2021-11-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет путей сообщений" (СГУПС) Способ обработки поверхности головки рельса и устройство для его осуществления

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0315704A1 (fr) * 1987-11-07 1989-05-17 Les Fils D'auguste Scheuchzer S.A. Machine de meulage pour le reprofilage des champignons de rails
EP0344390A1 (fr) * 1988-05-30 1989-12-06 Les Fils D'auguste Scheuchzer S.A. Machine de meulage de rails
EP0708205A1 (fr) 1994-10-20 1996-04-24 Josef Dipl.-Ing. Pomikacsek Procédé et dispositif de traitement des surfaces de roulement de rails par rectification tangentielle
EP0843043A1 (fr) * 1996-11-12 1998-05-20 Mecno S.R.L. Machine de meulage tangentiel
EP1367175A2 (fr) * 2002-05-30 2003-12-03 Balfour Beatty plc Machine de meulage de rails et méthode
EP1460176A1 (fr) 2003-03-20 2004-09-22 Stahlberg Roensch GmbH & Co. KG Dispositif pour reprofiler un rail par meulage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0315704A1 (fr) * 1987-11-07 1989-05-17 Les Fils D'auguste Scheuchzer S.A. Machine de meulage pour le reprofilage des champignons de rails
EP0344390A1 (fr) * 1988-05-30 1989-12-06 Les Fils D'auguste Scheuchzer S.A. Machine de meulage de rails
EP0708205A1 (fr) 1994-10-20 1996-04-24 Josef Dipl.-Ing. Pomikacsek Procédé et dispositif de traitement des surfaces de roulement de rails par rectification tangentielle
EP0843043A1 (fr) * 1996-11-12 1998-05-20 Mecno S.R.L. Machine de meulage tangentiel
EP1367175A2 (fr) * 2002-05-30 2003-12-03 Balfour Beatty plc Machine de meulage de rails et méthode
EP1460176A1 (fr) 2003-03-20 2004-09-22 Stahlberg Roensch GmbH & Co. KG Dispositif pour reprofiler un rail par meulage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3779045A1 (fr) 2019-08-13 2021-02-17 Plasser & Theurer Export Von Bahnbaumaschinen Gesellschaft m.b.H. Dispositif et procédé d'usinage de la surface d'une tête d'un rail par affûtage de surface

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