EP0141948A1 - Verfahren und Vorrichtung zum durchlaufenden Rektifizieren von Eisenbahnschienen - Google Patents

Verfahren und Vorrichtung zum durchlaufenden Rektifizieren von Eisenbahnschienen Download PDF

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Publication number
EP0141948A1
EP0141948A1 EP84110413A EP84110413A EP0141948A1 EP 0141948 A1 EP0141948 A1 EP 0141948A1 EP 84110413 A EP84110413 A EP 84110413A EP 84110413 A EP84110413 A EP 84110413A EP 0141948 A1 EP0141948 A1 EP 0141948A1
Authority
EP
European Patent Office
Prior art keywords
rail
polygon
profile
grinding
function
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
EP84110413A
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English (en)
French (fr)
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EP0141948B1 (de
Inventor
Romolo Panetti
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.)
Speno International SA
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Speno International SA
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Filing date
Publication date
Application filed by Speno International SA filed Critical Speno International SA
Priority to AT84110413T priority Critical patent/ATE25271T1/de
Publication of EP0141948A1 publication Critical patent/EP0141948A1/de
Application granted granted Critical
Publication of EP0141948B1 publication Critical patent/EP0141948B1/de
Expired legal-status Critical Current

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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 transverse profiles of the rails for railway tracks have been determined by calculation and experimentally, they have been improved over the years to optimize the requirements of the easiest manufacturing possible on the one hand and on the other hand the requirements relating to the safety and comfort of running convoys.
  • the UIC has defined several transverse profiles for the rails, one of the most frequently used of which is the UIC 60, illustrated in FIG.
  • an angle yn is defined as being the angle between a straight line D tangent to the profile of the rail head perpendicular to the vertical axis of symmetry x of the rail and the tangent Tn to the profile of the rail head at point N;
  • the transverse profile of the rail can be represented graphically by plotting for each point of the profile on the ordinate the radius of curvature of the rail and on the abscissa the angle y.
  • this graphic representation is given in Figure 2.
  • the tire profiles of the wheels of the railway vehicles were likewise determined by calculation and experience.
  • the rail and bandage profiles are conjugate profiles.
  • wave wear gradually forms as well as a significant deterioration of the average wear profile, more or less significant burrs can form.
  • the rails are reprofiled, in particular by grinding; operation which aims to give the rail a correct transverse profile.
  • a reprofiling process by grinding is described in patent CH 592,780 according to which one continuously moves along the rails several grinding units, forming angles between them and therefore grinding different generators of the rail whose pressure is adjusted, and therefore the cutting depth, depending on the differences existing for each generator concerned between the original profile and the actual profile of the rail.
  • the present invention relates to a method and a device for rectifying the rails of a continuous rail track, in particular for the finishing passes of reprofiling rails such as as defined in the independent claims of this patent.
  • the present method relates to the reshaping of the rails of a railway track using grinding tools mounted on carriages rolling on the rails and connected to a rail vehicle by members ensuring their traction along the rails and their application against these rails.
  • the licensee set itself the goal of eliminating the arbitrary uncertainties and adjustments relating to the positioning of the grinding wheels as well as their bearing pressure by defining a rigorous method for the determination of these parameters.
  • the first operation of the present method consists in defining for a section of the rail network to be rectified a satisfactory average wear profile o It is this average profile which will serve as a reference profile for the finishing of the rail reprofiling.
  • This mean wear or reference profile is represented for example in FIG. 3 and it is characterized by the fact that for each of these points N, N + 1 it has another radius of curvature Rn, Rn + 1.
  • the average reference wear profile for reshaping the second step of the present method consists in defining a polygon circumscribed by this reference profile.
  • This polygon or rather at least one of its parameters, such as number of facets n, the angle at the center a between the facets, the angle between two facets Ay, the width of the facets L, is determined as a function of the quality of finish of the desired reprofiling.
  • the polygon circumscribed to the reference profile is unambiguously defined on the one hand by said profile and on the other hand by a parameter of the polygon determined itself as a function of the precision of the desired reprofiling, in particular the number of sides , the angle between sides, etc.
  • the third operation of the present method consists in positioning the grinding units so that the active surface of each grinding wheel is parallel or tangent to one side of the previously determined polygon.
  • the fourth operation of the present method consists in adjusting the pressure of support of each grinding unit against the rail as a function of at least one parameter. on the side of the polygon with which it is associated.
  • the inclination of the axes of the grinding units relative to the plane of symmetry of the rail is, as so far, determined only by the judgment of the grinding personnel.
  • This adjustment of the angular position of the grinding units being carried out, each grinding wheel is located on one side of a polygon circumscribed to the rail.
  • the pressing pressure of each grinding wheel against the rail is determined as a function of one or more parameters of this polygon, and no longer arbitrarily as so far.
  • FIG. 5 very schematically illustrates the original basic principle of the method according to the present invention.
  • This figure shows a part of the mean wear profile 5 for reference of a section of track to be reprofiled.
  • the broken line 6 materializes the polygon circumscribed to the reference profile 5 comprising in the example illustrated four facets for each side of the rail covering the running table, the intermediate zone and the fillet.
  • the number of facets or sides of this polygon is determined according to the precision of the desired finishing reprofiling. In reality, this polygon could have more than eight facets covering the entire profile of the rail head. The greater the number of facets, the greater the precision of the reshaping, but the greater the number of grinding tools, respectively of work passes.
  • This polygon circumscribed to the reference profile can be determined by parameters other than its number of sides. For example we can impose that the angle between ⁇ facets either constant, or varies depending on the radius of curvature of the reference profile. It can also be imposed that the length of the sides L of this polygon is constant or a function of the radius of curvature of the reference profile.
  • Line 7 shows a real profile of the rail head to be reprofiled.
  • Each facet corresponds to a facet width L1, L2, L3, L4; an angle yl, y2, y3, y4 that the facet forms with a straight line tangent to the reference profile 5 and perpendicular to the x axis; an angle ⁇ 1 , ⁇ 2 , ⁇ 3 , ⁇ 4 formed by the envisaged side with the adjacent side situated on the side of the axis x of the rail, a mean radius of curvature R 1 , R 2 , R 3 , R4; an angle at the center ⁇ 1 , a 21 ⁇ 3 , ⁇ 4 ; a cutting depth C 1 , C 2 ′ C 3 , C 4 represented by the distance separating, at the midpoint of the side envisaged, the real profile 7 from the side of the polygon 6; and finally a removal surface S
  • the choice of the circumscribed polygon depends on the quality or finish of the desired reprofiling, it is possible for example in the first finishing passes to define a polygon whose metal removal surfaces S would be constant and equal to a maximum value. Thus, at the start of the finish, the maximum amount of metal would be removed per pass.
  • the circumscribed polygon which finally corresponds to the profile of the reprofiled rail, fits as best as possible to the reference profile 5 and it is a polygon where the angle between facets ⁇ will be chosen constant or function of the radius of curvature R which will be preferred.
  • the polygon determined according to the required quality of the reprofiling, can be limited to the original profile or to the actual profile of the rail and not to its average profile. of wear.
  • the essence of the present reprofiling process of a rail consists in moving along a line of rails of a railway track, a set of rail grinding units, angularly offset by one relative to the others and to regulate the pressure with which each of these grinding units is applied against the rail as a function of at least one parameter of a polygon circumscribed to a reference profile and whose sides are parallel to the active surfaces of the grinding wheels grinding units.
  • each grinding unit against the rail is thus a function of the position of the corresponding facet relative to the axis of symmetry of the rail, that is to say a function of the angular offset y of l 'grinding unit with respect to this axis of symmetry of the rail, generally approximately vertical; on the other hand this pressure is also a function of the width L of the envisaged side or of the desired depth of cut C for example or of a combination of these parameters. It can also be a function of metal surface to be removed S.
  • the method also provides that the polygon or some of its parameters are defined as a function of the quality of the reprofiling desired, the polygon in question is defined as being a polygon circumscribed in the profile that one wishes to reconstruct either the original profile or better still the average wear profile of the rail, although in the case of the simplified method this polygon may be circumscribed to the actual profile of the worn rail.
  • the device for implementing the method described comprises a set of grinding units 10 carried by a carriage 11 guided by the rail 12, each comprising a motor 13 for driving a lapidary wheel 14 in rotation.
  • a jack 15 makes it possible to apply the grinding wheel 14 against the rail with a determined force.
  • Each unit 10 is angularly movable relative to the carriage 11 and therefore relative to the other grinding units carried by this carriage 11.
  • Each grinding unit further comprises a motor 16 controlling the inclination of this unit relative to the carriage and a sensor 17 measuring the angle of inclination of this unit 10 relative to the carriage 11.
  • Each grinding unit is controlled by a control circuit 18 comprising on the one hand a servo-control of the inclination of the unit and on the other hand a servo-control of the bearing force of the grinding wheel 14 against the rail 12.
  • the tilt control of the grinding unit 10 comprises an angle selector 19 supplied by a memory 22 containing the parameters of the polygon, in particular the angular position of its facets, and selects for each grinding unit the facet of the polygon to which the active face of the grinding wheel must be parallel and therefore the degree of inclination of the grinding unit 11 relative to the carriage 12.
  • the signal delivered by this selector 19 supplies the first input of an angle error detector 20 whose other input is supplied by the output of the sensor 17. As soon as a difference is detected between the inputs of the error detector 20, the latter delivers a signal to the amplifier 21 which controls the motor 16.
  • the control of the pressing pressure of the grinding wheel 14 against the rail 12 comprises a calculator 23 powered by the memory 22 and the tilt selector 19. This calculator determines as a function of at least one parameter of the polygon stored at 22 and where appropriate, taking into account the angle of inclination of the unit, a control value which is delivered to a servo-valve 24 controlling the supply of the jack 15 by a source of fluid 25.
  • a calculator 26 containing in memory the information relating to the reference profile determined by the quality of the desired reprofiling, determines the parameters of the polygon as a function of said profile and of information I defining the desired quality of finish. These parameters or characteristics of the polygon are stored at 22.
  • FIG. 7 illustrates a polygon circumscribed with the desired reference profile comprising 24 grinding facets or sides of the polygon distributed over the rolling surface of the rail, the internal fillet of the latter and the rolling zone between these two parts.
  • This polygon circumscribed to the reference profile is determined according to the quality of the desired reprofiling, in this precise case the width of the grinding facets, that is to say the length of the sides of the polygon, is a function of the radius of curvature of the reference profile.
  • the side of the polygon centered on the vertical axis of the rail is of 3.46 mm as well as the following facet.
  • the third facet from the axis of the rail has a width of 3.16 mm the 4, 5, 6, 7 and 8 facets a width of 2.79 mm, the ninth a width of 2.52 mm and the rest a width of 2.27 mm.
  • a machine comprising four carriages A, B, C, D each carrying two grinding units.
  • the grinding units of a carriage A are angularly offset from each other by 10 ° while the grinding units of the other three carriages B, C, D are offset from each other by 2 °
  • the finishing reprofiling is carried out in three successive passes during which the four carriages occupy different angular positions relative to the rail.
  • the carriage A In a first pass, relative to the longitudinal plane of the rail, the carriage A is offset at 28 °, the carriage B at 4 °, the carriage C at - 0.7 ° and the carriage D at - 12 °. During this machining pass the sides 6, 5; 11.12; 18, 15 and 23, 24 are reprofiled. In a second machining pass, the carriage A is offset at 48 °, the carriage B at 8 °, the carriage C at 0 ° and the carriage D at - 8 ° The sides 3.4; 9.10; 14.17; and 21.22 are reprofiled.
  • the carriage A is offset at 68 °, the carriage B at 12 °, the carriage C at 0.7 ° and the carriage D at - 4 ° and the sides 1.2; 7.8; 13.15; and 19.20 are reprofiled.
  • the grinding pressure is the pressure of each wheel against the rail is in this particular case function of the angle y on the side of the polygon and of its width L.
  • a polygon circumscribed on the reference profile is determined, the width of the sides of which is a function of the radius of curvature of the reference profile; then the grinding wheels are placed parallel to the sides of this polygon, the pressure of each grinding wheel against the rail being determined as a function of the angle of the corresponding side of the polygon and of its width so that the surface of metal to be removed S corresponding to each side of the polygon is effectively ground.
  • each grinding unit comprises two motors each driving a grinding wheel.
  • Each unit therefore comprises a pair of grinding wheels applied against the rail with the same force coming from application means common to the grinding unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Paper (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
EP84110413A 1983-09-16 1984-09-01 Verfahren und Vorrichtung zum durchlaufenden Rektifizieren von Eisenbahnschienen Expired EP0141948B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84110413T ATE25271T1 (de) 1983-09-16 1984-09-01 Verfahren und vorrichtung zum durchlaufenden rektifizieren von eisenbahnschienen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5052/83 1983-09-16
CH5052/83A CH654047A5 (fr) 1983-09-16 1983-09-16 Procede et dispositif pour le reprofilage en continu des rails d'une voie ferree.

Publications (2)

Publication Number Publication Date
EP0141948A1 true EP0141948A1 (de) 1985-05-22
EP0141948B1 EP0141948B1 (de) 1987-01-28

Family

ID=4287148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84110413A Expired EP0141948B1 (de) 1983-09-16 1984-09-01 Verfahren und Vorrichtung zum durchlaufenden Rektifizieren von Eisenbahnschienen

Country Status (9)

Country Link
US (1) US4905422A (de)
EP (1) EP0141948B1 (de)
JP (1) JPS6095003A (de)
AT (1) ATE25271T1 (de)
AU (1) AU566436B2 (de)
CA (1) CA1253344A (de)
CH (1) CH654047A5 (de)
DE (2) DE3462278D1 (de)
ZA (1) ZA847125B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2189051A (en) * 1984-03-29 1987-10-14 Rail Profiling Holdings Inc Automated railway track maintenance system
EP0235602A3 (en) * 1986-02-28 1988-10-12 Les Fils D'auguste Scheuchzer S.A. Process for measuring and grinding a rail head profile
FR2750632A1 (fr) * 1996-07-08 1998-01-09 Efsa Procede et dispositif de meulage d'une surepaisseur d'une piece metallique

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4779384A (en) * 1986-02-13 1988-10-25 Harsco Corporation Rail grinder
JPS62233308A (ja) * 1986-03-31 1987-10-13 芝浦メカトロニクス株式会社 レ−ル頭部削正装置
CH680672A5 (de) * 1989-08-28 1992-10-15 Speno International
CH680597A5 (de) * 1989-08-28 1992-09-30 Speno International
CH680598A5 (de) * 1989-08-28 1992-09-30 Speno International
GB2241063B (en) * 1990-02-14 1994-01-05 Rolls Royce Plc Monitoring a machining operation
CH685129A5 (fr) * 1991-03-01 1995-03-31 Speno International Dispositif pour le reprofilage des rails d'une voie ferrée.
US5271204A (en) * 1992-01-21 1993-12-21 Wolf Morris A Lightweight display post and method of making same
CH689643A5 (fr) * 1994-02-18 1999-07-30 Speno International Installation pour le reprofilage des rails d'une voie ferrée.
CH689642A5 (fr) * 1994-02-18 1999-07-30 Speno International Installation pour le reprofilage des rails d'une voie ferrée.
CH690963A5 (fr) * 1996-12-20 2001-03-15 Speno Internat S A Dispositif pour la finition du reprofilage en voie et en continu de la surface du champignon d'au moins un rail d'une voie ferrée.
US6033291A (en) * 1998-03-16 2000-03-07 Loram Maintenance Of Way, Inc. Offset rail grinding
US9073167B2 (en) * 2011-10-07 2015-07-07 Bombardier Transportation Gmbh Precision rail profiling device for railway turnouts and crossings
US9073164B2 (en) * 2011-10-07 2015-07-07 Bombardier Transportation Gmbh Precision rail profiling device for railway crossovers
US20140113525A1 (en) * 2012-10-22 2014-04-24 Apple Inc. Methods for finishing surfaces using tool center point shift techniques
RU2539309C1 (ru) * 2013-09-19 2015-01-20 Открытое акционерное общество Научно-исследовательский и конструкторско-технологический институт подвижного состава (ОАО "ВНИКТИ") Устройство для шлифовки головки рельса
BR112016008836B1 (pt) * 2013-10-21 2022-07-19 Harsco Technologies Llc. Método para a determinação de uma operação de moagem de motores de moagem em um veículo de moagem e veículo de moagem de trilho
KR101905993B1 (ko) * 2016-10-31 2018-10-10 현대자동차주식회사 차량용 내장재 및 그 성형 방법
CN111809463B (zh) * 2019-04-11 2023-06-16 中国铁建高新装备股份有限公司 一种基于ai方法的钢轨智能打磨系统及相应的打磨方法
CN115305753B (zh) * 2022-10-12 2023-02-07 中国铁建高新装备股份有限公司 一种钢轨廓形快速预测方法、系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2333897A1 (fr) * 1975-12-01 1977-07-01 Plasser Bahnbaumasch Franz Machine mobile de polissage des rails
FR2405329A1 (fr) * 1977-10-10 1979-05-04 Scheuchzer Fils Auguste Chariot de meulage de la surface de roulement des rails de chemin de fer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT344772B (de) * 1975-12-01 1978-08-10 Plasser Bahnbaumasch Franz Schienenschleifmaschine
CH592780A5 (de) * 1976-01-07 1977-11-15 Speno International
CH606616A5 (de) * 1976-02-18 1978-11-15 Speno International
EP0125348B1 (de) * 1983-05-17 1986-10-15 Les Fils D'auguste Scheuchzer S.A. Maschine zur Wiederherstellung des Profils von Schienenköpfen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2333897A1 (fr) * 1975-12-01 1977-07-01 Plasser Bahnbaumasch Franz Machine mobile de polissage des rails
FR2405329A1 (fr) * 1977-10-10 1979-05-04 Scheuchzer Fils Auguste Chariot de meulage de la surface de roulement des rails de chemin de fer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2189051A (en) * 1984-03-29 1987-10-14 Rail Profiling Holdings Inc Automated railway track maintenance system
GB2189051B (en) * 1984-03-29 1990-10-17 Rail Profiling Holdings Inc Automated railway track maintenance system
EP0235602A3 (en) * 1986-02-28 1988-10-12 Les Fils D'auguste Scheuchzer S.A. Process for measuring and grinding a rail head profile
FR2750632A1 (fr) * 1996-07-08 1998-01-09 Efsa Procede et dispositif de meulage d'une surepaisseur d'une piece metallique
WO1998001624A1 (fr) * 1996-07-08 1998-01-15 E F S A Procede et dispositif de meulage d'une surepaisseur d'une piece metallique

Also Published As

Publication number Publication date
ZA847125B (en) 1985-04-24
DE141948T1 (de) 1985-09-12
AU566436B2 (en) 1987-10-22
JPS6095003A (ja) 1985-05-28
CH654047A5 (fr) 1986-01-31
DE3462278D1 (en) 1987-03-05
US4905422A (en) 1990-03-06
AU3307684A (en) 1985-03-21
CA1253344A (en) 1989-05-02
EP0141948B1 (de) 1987-01-28
ATE25271T1 (de) 1987-02-15

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