EP2390415B1 - 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
EP2390415B1
EP2390415B1 EP20100164382 EP10164382A EP2390415B1 EP 2390415 B1 EP2390415 B1 EP 2390415B1 EP 20100164382 EP20100164382 EP 20100164382 EP 10164382 A EP10164382 A EP 10164382A EP 2390415 B1 EP2390415 B1 EP 2390415B1
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EP
European Patent Office
Prior art keywords
grinding
rail
bodies
grinding bodies
longitudinal direction
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
EP20100164382
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German (de)
English (en)
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EP2390415A1 (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
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Vossloh High Speed Grinding GmbH
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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
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Publication of EP2390415B1 publication Critical patent/EP2390415B1/fr
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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 ,
  • the new grinding process is grinding with passively driven grinding wheels, such as in a process 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 abrasion of the individual grinding body on the rail but also the reaction forces vary: first, a resistance force Fw in opposite direction of travel, which is compensated by the propulsive force of the machine, on the other hand arises by the inclination also a transverse force F o , which wants to drive the grinding body laterally from the rail and which can be compensated by a corresponding guide, which would have to be supported on the rail.
  • the magnitude of this transverse force increases proportionally according to the number of abrasive bodies in the mentioned group. Therefore, in a like in Fig. 5 of the EP 0 708 205 A1 shown arrangement, the lateral forces add up to substantial orders of magnitude.
  • the guide would have to be designed to both statically absorb the lateral forces and prevent derailment, as well as dynamically periodic running and retraction due to elasticities in the structure or track changes or other disturbances with the result to avoid a non-uniform microsection and in the worst case a wavy rail surface.
  • the basic idea on which the present invention is based is that, unlike the arrangement of the abrasive bodies in a grinding rack, as is known for devices with passively driven grinding wheels in the prior 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.
  • an even number of abrasive bodies is arranged in the grinding rack, and there are two abrasive bodies of the same type arranged with its axis of rotation at an acute angle of the same amount but different sign to the rail longitudinal direction.
  • This type of design of the device provides a simplification insofar as grinding wheels of the same type can be used in pairs, which facilitates design considerations in terms of simplification and standardization.
  • 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, ie to rotate about its vertical axis.
  • a torque is set due to the distribution of forces relative to a pivot point, which seeks to effect a rotation of the grinding frame about a perpendicular to the longitudinal direction of the grinding frame, passing through the pivot axis of rotation.
  • 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.
  • a pair of abrasive bodies for example arranged at a positive acute angle, which applies a double transverse force, such as two further abrasive bodies arranged in front of and behind this pair of abrasive bodies with negative ones acute angle to the rail longitudinal direction set rotation axis.
  • these abrasive bodies are respectively arranged equidistant from the central abrasive bodies so as to apply a transverse load of half the horizontal force in operation in the opposite direction to the lateral force of the central abrasive bodies during operation, the condition of both force and torque freedom is satisfied.
  • the apparatus 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 it starts from one on The center located on both sides of the same center 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.
  • a pair of grinding wheels make out, 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.
  • all the grinding bodies with their axes of rotation to the rail longitudinal direction include an angle of equal magnitude, in particular in the range of 40 ° to 60 °, but with different signs.
  • 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 grinding 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.

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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)

Claims (8)

  1. Dispositif d'usinage des surfaces de roulement (8) de rails (3) par meulage périphérique comprenant au moins un châssis de meulage réglable au niveau de la surface de roulement (8) du rail (3) et mobile le long du rail (3), qui présente au moins quatre corps de meulage (6) montés rotatifs et respectivement libres autour de leur axe de rotation (5) respectif pour effectuer un meulage périphérique, où le châssis de meulage (4) est installé et les corps de meulage sont montés dans celui-ci de telle sorte que les axes de rotation (5) décrivent un angle aigu (oc) par rapport à la direction longitudinale des rails pour l'usinage des surfaces de roulement (8) avec un châssis de meulage (4) disposé au niveau d'un rail (3), caractérisé en ce que le châssis de meulage (4) contient un nombre pair de corps de meulage (6), où les corps de meulage (6) de même conception sont disposés avec leurs axes de rotation (5) dans le châssis de meulage (4) de telle sorte que pour l'usinage des surfaces de roulement (8), avec un châssis de meulage (4) disposé au niveau d'un rail (3), les axes de rotation (5) d'un premier groupe de corps de meulage (6) contenant la moitié en nombre des corps de meulage (6), décrivent un premier angle aigu (+α) respectivement par rapport à la direction longitudinale des rails (L), et les axes de rotation (5) d'un second groupe de corps de meulage (6) contenant la moitié en nombre des corps de meulage (6) décrivent respectivement un second angle aigu (-α) dont le préfixe se distingue du premier angle aigu (+α), où tous les premiers et seconds angles aigus (+α, - α) sont respectivement identiques et où la configuration des corps de meulage (6) est choisie de telle sorte que l'on obtient un couple de rotation (M) agissant perpendiculairement à la direction d'approche sur le châssis de meulage (4), couple sensiblement égal à zéro.
  2. Dispositif selon la revendication 1, caractérisé en ce qu'il comprend quatre ou un multiple de quatre corps de meulage (6) qui sont aménagés dans le châssis de meulage (4) le long d'une ligne imaginaire, et qu'en partant d'un centre (P) situé sur la ligne le même nombre de corps de meulage (6) est disposé respectivement des deux côtés du centre de telle sorte qu'un corps de meulage de même conception est prévu à égale distance des deux directions du centre (P) pour que les axes de rotation de ces corps de meulage (6) présentant la même distance par rapport au centre (P) décrivent le même angle aigu (+α, - α) par rapport à la direction longitudinale des rails (L).
  3. Dispositif selon l'une des revendications précédentes, caractérisé en ce que tous les corps de meulage (6) avec leurs axes de rotation (5) décrivent un angle aigu (α) identique, en particulier compris entre 40° et 60°, par rapport à la direction longitudinale des rails (L), avec un préfixe différent.
  4. Dispositif selon la revendication 2 et la revendication 3, caractérisé en ce que les corps de meulage (6) qui décrivent avec leurs axes de rotation (5) un angle positif (+α) par rapport à la direction longitudinale des rails, et les corps de meulage (6), qui décrivent avec leurs axes de rotation (5) un angle négatif (-α) par rapport à la direction longitudinale des rails, sont regroupés respectivement en groups de corps de meulage voisins (6) de telle sorte qu'un groupe de corps de meulage (6) de deux orientations se trouvent sur les deux côtés du centre (P).
  5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que tous les corps de meulage (6) dans le châssis de meulage (4) sont tous de même conception.
  6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les corps de meulage (6) sont prévus de telle sorte que les corps de meulage (6) dont les axes de rotation (5) décrivent un angle aigu (+α) par rapport à la direction longitudinale des rails (L) avec un premier préfixe, sont aménagés pour s'engrener dans un bord interne de la surface de roulement de rail à traiter (8), et que les corps de meulage (6) dont les axes de rotation (5) décrivent un angle aigu (-α) par rapport à la direction longitudinale des rails (L), avec un second préfixe distinct du premier préfixe, sont aménagés pour s'engrener dans un bord externe de la surface de roulement de rail à traiter (8).
  7. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comprend un véhicule autopropulsé avec un châssis de meulage (1) au niveau duquel est prévu au moins un châssis de meulage (4).
  8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il présente au moins deux châssis de meulage (4) avec des corps de meulage (6) aménagés et orientés comme il convient, où au moins un châssis de meulage (4) est prévu pour l'usinage par meulage de chacun des deux rails (3) circulant sur une voie.
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 EP2390415A1 (fr) 2011-11-30
EP2390415B1 true 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
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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT522861A1 (de) 2019-08-13 2021-02-15 Plasser & Theurer Export Von Bahnbaumaschinen Gmbh Vorrichtung und Verfahren zum Bearbeiten der Oberfläche eines Schienenkopfes einer Schiene durch Stirnschleifen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3772057D1 (de) * 1987-11-07 1991-09-12 Scheuchzer Fils Auguste Schleifmaschine fuer die reprofilierung von schienenkoepfen.
EP0344390B1 (fr) * 1988-05-30 1992-02-26 Les Fils D'auguste Scheuchzer S.A. Machine de meulage de rails
DE4437585C1 (de) 1994-10-20 1996-03-21 Pomikacsek Josef Verfahren und Vorrichtung zum Bearbeiten der Lauffläche von Schienen durch ein Umfangsschleifen
IT1291080B1 (it) * 1996-11-12 1998-12-14 Mecno Srl Macchina molatrice tangenziale
GB0212517D0 (en) * 2002-05-30 2002-07-10 Balfour Beatty Plc Rail grinding apparatus and method
ATE333006T1 (de) 2003-03-20 2006-08-15 Stahlberg Roensch Gmbh & Co Kg Vorrichtung zum bearbeiten der laufflächen von schienen durch umfangsschleifen

Cited By (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

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