EP2528702A1 - Verfahren zur herstellung einer nachgiebigen schienenklemme - Google Patents

Verfahren zur herstellung einer nachgiebigen schienenklemme

Info

Publication number
EP2528702A1
EP2528702A1 EP10796315A EP10796315A EP2528702A1 EP 2528702 A1 EP2528702 A1 EP 2528702A1 EP 10796315 A EP10796315 A EP 10796315A EP 10796315 A EP10796315 A EP 10796315A EP 2528702 A1 EP2528702 A1 EP 2528702A1
Authority
EP
European Patent Office
Prior art keywords
bent rod
amount
load
deflection
predetermined
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
EP10796315A
Other languages
English (en)
French (fr)
Other versions
EP2528702B1 (de
Inventor
Stephen John Cox
David Rhodes
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.)
Pandrol Ltd
Original Assignee
Pandrol Ltd
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 Pandrol Ltd filed Critical Pandrol Ltd
Priority to SI201030911T priority Critical patent/SI2528702T1/sl
Priority to PL10796315T priority patent/PL2528702T3/pl
Publication of EP2528702A1 publication Critical patent/EP2528702A1/de
Application granted granted Critical
Publication of EP2528702B1 publication Critical patent/EP2528702B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/36—Making other particular articles clips, clamps, or like fastening or attaching devices, e.g. for electric installation
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
    • E01B9/28—Fastening on wooden or concrete sleepers or on masonry with clamp members
    • E01B9/30—Fastening on wooden or concrete sleepers or on masonry with clamp members by resilient steel clips
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
    • E01B9/28—Fastening on wooden or concrete sleepers or on masonry with clamp members
    • E01B9/30—Fastening on wooden or concrete sleepers or on masonry with clamp members by resilient steel clips
    • E01B9/303—Fastening on wooden or concrete sleepers or on masonry with clamp members by resilient steel clips the clip being a shaped bar

Definitions

  • the present invention relates to a method of manufacturing a resilient rail clip.
  • Various forms of resilient rail clips are known, for example as shown and described in GB1510224A and EP0619852B.
  • a known method of manufacturing a resilient rail clip comprises bending a metal rod (usually made of steel) into a predetermined shape and then subjecting the bent rod to a cold setting process to achieve the final form of the clip.
  • Such rods have a common load-deflection characteristic with a common slope (clip stiffness) up to the elastic limit of the metal from which the bent rod is formed.
  • Cold setting is intended to take the bent rod beyond that elastic limit, thereby inducing a permanent deflection (set) into the resulting clip, such that if it is then unloaded and taken up the load-deflection characteristic a second time, the load-deflection characteristic will be linear up to a much higher load, that is up to the load at which the new characteristic intercepts that for the original rod.
  • One of the key problems in cold- setting is that the metal rods from which the clips are made themselves vary in hardness, typically between 44 and 48 Rockwell hardness.
  • a method of manufacturing a resilient rail clip comprising bending a rod, made of metal having a hardness value falling within a known hardness value range, into a predetermined shape and then subjecting the bent rod to a cold setting process in order to induce in the bent rod a predetermined amount of permanent set
  • the cold setting process comprises: applying a first load to part of the bent rod so as to cause a first amount of deflection of that part of the bent rod, which first load is a predetermined load having a value equal to or greater than that required to reach the yield point of metal having the highest hardness value in the said hardness value range; measuring the first amount of deflection of the said part of the bent rod achieved by applying the predetermined first load; determining, on the basis of the measured deflection amount, either (i) a second load, which, when applied to the said part of the bent rod, will cause the bent rod to acquire the predetermined amount of permanent set, or (ii) a second amount of
  • a method of manufacturing a resilient rail clip comprising bending a rod, made of metal having a hardness value falling within a known hardness value range, into a predetermined shape and then subjecting the bent rod to a cold setting process in order to induce in the bent rod a predetermined amount of permanent set, wherein the cold setting process comprises: deflecting part of the bent rod by a predetermined first amount by applying a first load having a value equal to or greater than that required to reach the yield point of metal having the highest hardness value in the said hardness value range; measuring the amount of the first load required to achieve the
  • predetermined first amount of deflection determining, on the basis of the measured first load, either (i) a second deflection amount required in order to bring about in the bent rod the predetermined amount of permanent set, or (ii) a second load, which, when applied to the said part of the bent rod, will cause the bent rod to acquire the predetermined amount of permanent set; and deflecting the said part of the bent rod by the determined second deflection amount or applying the determined second load to the said part of the bent rod.
  • Figures 1A to 1 C show the load-deflection characteristics of two rail clips of different respective hardness which have been cold set according to a previously-proposed method
  • FIGS. 2A and 2B show respective flow diagrams depicting two alternative cold setting processes used in embodiments of the present invention
  • Figure 3A shows a rail clip undergoing part of a cold setting process used in an embodiment of the present invention and Figure 3B shows the same rail clip after cold setting with a set caused by that cold setting process;
  • Figures 4A and 4B each show the load-deflection characteristics of two rail clips of different respective hardness, the thicker lines showing the characteristics after the clips have been cold set according to a method embodying the present invention and the thinner lines showing the characteristics of the clips before cold setting, in which Figures 4A and 4B correspond respectively to methods embodying the first aspect and the second aspect of the present invention.
  • a rod of metal having a hardness value falling within a known hardness value range, is bent into a predetermined clip shape (see Figure 3A) and then subjected to a two-stage cold setting process, as shown in the flow diagrams of Figure 2A or 2B.
  • the rod is loaded to a level equal to or beyond the yield point of a rod having a hardness value at the top of the hardness value range (STEP 1 ). Then, depending on the method being used, either a measurement is taken of how much deflection d x has resulted in STEP 1 from a fixed applied force F 0 (STEP 2, Figure 2A), or how much force F x has been required in STEP 1 to reach a fixed deflection d c (STEP 2, Figure 2B).
  • the measured deflection d x is then used to determine the amount of force F 0 + ⁇ ⁇ or second deflection amount d x + Ad x (STEP 3, Figure 2A) required in order to induce in the bent rod a predetermined amount of permanent set S in a second stage of the process, during which the larger force or deflection is applied to the rod.
  • the measured force F x is then used to determine the deflection d 0 + Ad x or second load F x + AF X (STEP 3, Figure 2B) required in order to induce in the bent rod a predetermined amount of permanent set S in a second stage of the process, during which the larger deflection or force is applied to the rod.
  • the measured values are used by equipment (and/or by a person) to find the additional force/deflection required, for example by reference to a predetermined look-up table or by calculation.
  • the rod is subjected to the force or deflection determined in STEP 3 of the preceding stage, the amount of which will vary depending on the hardness of the rod, such that the resulting clip (see Figure 3B) is always set to a point that lies along a line that is parallel to the initial load-deflection characteristic of the original rod, as shown in Figures 4A and 4B.
  • each clip when unloaded will always fall back along an extension of this line, and thus all clips made using this method will have the same amount of set, and therefore the same finished geometry, as each other, regardless of the hardness of the rod.
  • employing a method embodying the present invention allows the geometry of the clip after the cold- setting process to be closely defined, and in particular it may be more precisely defined than the geometry of the clip before the cold-setting process.
  • Figure 4A shows the load-deflection characteristics for clips of different respective hardness, before (thinner lines) and after (thicker lines) cold setting by a method embodying the first aspect of the present invention, in which a measurement is taken of how much deflection, d H (hard clip) or d s (soft clip), has resulted from application to the clip of a fixed applied force F 0> and the measured deflection for that clip (d H /d s ) is then used to determine the amount of force, F 0 + AF H (hard clip) or F 0 + AF S (soft clip), or the amount of deflection, d H + Ad H (hard clip) or d s + Ad s (soft clip), required in order to achieve a predetermined amount of permanent set S.
  • d H hard clip
  • d s soft clip
  • Figure 4B shows the load-deflection characteristics for clips of different respective hardness, before (thinner lines) and after (thicker lines) cold setting by a method embodying the second aspect of the present invention, in which a measurement is taken of how much force, F H (hard clip) or F s (soft clip), is required in order to achieve a fixed deflection d 0 of the clip, and the measured force for that clip (F H /F S ) is then used to determine the amount of deflection, d 0 + Ad H (hard clip) or d c + Ad s (soft dip), or the amount of feree, F H + AF H (hard clip) or F s + AF S (soft clip), required in order to achieve a predetermined amount of permanent set S.
  • F H hard clip
  • F s soft clip

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Clamps And Clips (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Railway Tracks (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP10796315.9A 2010-01-27 2010-12-03 Verfahren zur herstellung einer nachgiebigen schienenklemme Active EP2528702B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI201030911T SI2528702T1 (sl) 2010-01-27 2010-12-03 Postopek izdelave prožne tirnične sponke
PL10796315T PL2528702T3 (pl) 2010-01-27 2010-12-03 Sposoby wytwarzania sprężystego zacisku szynowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1001301A GB2477282A (en) 2010-01-27 2010-01-27 Method of manufacturing a resilient metal rail clip with hardness within a known range
PCT/EP2010/068893 WO2011091893A1 (en) 2010-01-27 2010-12-03 Methods of manufacturing a resilient rail clip

Publications (2)

Publication Number Publication Date
EP2528702A1 true EP2528702A1 (de) 2012-12-05
EP2528702B1 EP2528702B1 (de) 2015-02-18

Family

ID=42046114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10796315.9A Active EP2528702B1 (de) 2010-01-27 2010-12-03 Verfahren zur herstellung einer nachgiebigen schienenklemme

Country Status (18)

Country Link
US (1) US20130074559A1 (de)
EP (1) EP2528702B1 (de)
JP (1) JP5677466B2 (de)
KR (1) KR101779394B1 (de)
CN (1) CN102712028B (de)
AU (1) AU2010344043B2 (de)
BR (1) BR112012017549B1 (de)
CA (1) CA2787694C (de)
DK (1) DK2528702T3 (de)
ES (1) ES2531309T3 (de)
GB (1) GB2477282A (de)
MX (1) MX2012008685A (de)
PL (1) PL2528702T3 (de)
PT (1) PT2528702E (de)
RU (1) RU2543588C2 (de)
SI (1) SI2528702T1 (de)
WO (1) WO2011091893A1 (de)
ZA (1) ZA201205545B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024047524A1 (de) 2022-08-29 2024-03-07 Voestalpine Turnout Technology Zeltweg GmbH Verfahren zur herstellung einer schienenbefestigung, verfahren zur erhöhung der schwingfestigkeit einer spannfeder zum niederhalten eines gleiskörperelements und schienenbefestigung

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL163277C (nl) * 1974-02-26 1984-03-16 Everts & Van Der Weyden Nv Werkwijze voor het maken van een railklem.
GB1510224A (en) 1975-11-07 1978-05-10 Pandrol Ltd Railway rail fastening clip and a railway rail-and-fastening assembly employing it
NL182379C (nl) * 1978-07-19 1988-03-01 Everts & Van Der Weyden Nv Werkwijze voor het vervaardigen van een c-vormige railklem.
US4300380A (en) * 1978-10-13 1981-11-17 Pandrol Limited Apparatus and a method for use in making a railway rail-fastening clip
US4278204A (en) * 1978-11-29 1981-07-14 Pandrol Limited Rail clip
NL7906455A (nl) * 1979-08-28 1981-03-03 Everts & Van Der Weyden Nv Railklem.
DE2965999D1 (en) * 1979-10-26 1983-09-01 Mckay Ralph Ltd A rail clip holder
OA09065A (en) * 1987-10-19 1991-10-31 Pandrol Ltd Fastening railway rails.
IN185922B (de) * 1991-12-18 2001-05-19 Pandrol Ltd
BR9406732A (pt) * 1993-06-02 1996-01-30 Jude Odihachukunma Igwemezie Dormente de trilho chapa de dormente e prendedor aperfeiçoados
GB2298442B (en) * 1995-03-03 1999-01-13 Pandrol Ltd Railway rail-fastening clip and assembly
US7383709B2 (en) * 2005-08-04 2008-06-10 Custom Machining Services, Inc. System and process for crimping a fitting to a fluid conduit
JP4842758B2 (ja) * 2006-10-06 2011-12-21 太平工業株式会社 線ばねクリップによるレール締結方法
JP5170089B2 (ja) * 2007-05-09 2013-03-27 新日鐵住金株式会社 薄板のプレス成形装置及びプレス成形方法
ITRM20080078A1 (it) * 2008-02-12 2009-08-13 Cml Intarnational S P A Metodo di verifica e comando per curvare in modo continuo un pezzo allungato secondo raggi di curcatura variabili e macchina cosi' comandata
HUP0800082A2 (en) * 2008-02-12 2009-10-28 Robert Csepke Clamping device for fastening railway rails on cross-sleeper and fastener spring thereof
AU2010201544A1 (en) * 2009-04-21 2010-11-04 Betaswage Pty Ltd Control of metal cold forming machines
IT1394105B1 (it) * 2009-05-06 2012-05-25 Cml Int Spa Macchina per curvare in modo continuo un pezzo allungato secondo raggi predeterminati

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011091893A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024047524A1 (de) 2022-08-29 2024-03-07 Voestalpine Turnout Technology Zeltweg GmbH Verfahren zur herstellung einer schienenbefestigung, verfahren zur erhöhung der schwingfestigkeit einer spannfeder zum niederhalten eines gleiskörperelements und schienenbefestigung

Also Published As

Publication number Publication date
JP2013518196A (ja) 2013-05-20
CA2787694A1 (en) 2011-08-04
BR112012017549B1 (pt) 2020-04-22
RU2012136430A (ru) 2014-03-10
JP5677466B2 (ja) 2015-02-25
ES2531309T3 (es) 2015-03-12
KR20120116006A (ko) 2012-10-19
AU2010344043B2 (en) 2014-07-17
PT2528702E (pt) 2015-02-27
WO2011091893A1 (en) 2011-08-04
GB2477282A (en) 2011-08-03
RU2543588C2 (ru) 2015-03-10
AU2010344043A1 (en) 2012-08-16
DK2528702T3 (en) 2015-05-26
KR101779394B1 (ko) 2017-09-18
PL2528702T3 (pl) 2015-07-31
EP2528702B1 (de) 2015-02-18
GB201001301D0 (en) 2010-03-10
US20130074559A1 (en) 2013-03-28
CA2787694C (en) 2017-02-07
ZA201205545B (en) 2013-04-24
BR112012017549A2 (pt) 2016-06-28
SI2528702T1 (sl) 2015-05-29
CN102712028A (zh) 2012-10-03
CN102712028B (zh) 2014-11-05
MX2012008685A (es) 2012-08-23

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