EP1736600B1 - Method for producing a noise-abating rail - Google Patents
Method for producing a noise-abating rail Download PDFInfo
- Publication number
- EP1736600B1 EP1736600B1 EP06115746A EP06115746A EP1736600B1 EP 1736600 B1 EP1736600 B1 EP 1736600B1 EP 06115746 A EP06115746 A EP 06115746A EP 06115746 A EP06115746 A EP 06115746A EP 1736600 B1 EP1736600 B1 EP 1736600B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rail
- producing
- content
- welding
- running noise
- 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.)
- Not-in-force
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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
- E01B5/00—Rails; Guard rails; Distance-keeping means for them
- E01B5/02—Rails
- E01B5/04—Grooved rails
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B5/00—Rails; Guard rails; Distance-keeping means for them
- E01B5/02—Rails
- E01B5/14—Rails for special parts of the track, e.g. for curves
Definitions
- the invention relates to a method for producing a rail with reduced rolling noise, in particular for use in conjunction with tram rails and in particular in conjunction with curved rails, which have narrow radii, wherein the running surface of the rail provided with at least one, parallel to the rail longitudinal direction, additional material layer which is produced by applying a welding path in the submerged arc welding process (UP).
- UP submerged arc welding process
- Such a method is from the German patent application DE 25 54 704 A1 known.
- rails for rail vehicles are subdivided into sub-surfaces which run along the rail and are arranged at a distance from one another.
- the partial surfaces are applied to the original rail, inter alia, by submerged arc welding or by welding under protective gas with consumable welding wire.
- the material used for the partial surfaces is a metallic filler material, which may also comprise a non-ferrous metal, with a mono- or multiphase bronze having at least 50% copper content and one or more other alloying elements.
- the so-called stick-slip effect can play a role.
- the noise will probably be the same effect as when a wet finger strokes the edge of a half-filled wine glass.
- the object of the invention is therefore to provide a simple and easy to carry out method for producing a rail with reduced rolling noise.
- a high-alloyed basic welding wire is now used as the welding wire; in particular, a flux-cored wire is used as the welding wire Welding wire used because it has been found that a welding process with solid wires does not lead to the desired result.
- Such welding wires are commonly used in building construction, so that the expert has not come up to the present invention on the idea to use such a combination of materials for the track construction.
- the welding wire according to the invention is provided as a high-alloyed welding wire with a carbon content of between 0.0 and 1.5%, in particular between 0 and 0.5%.
- the manganese content is between 0.0 and 5%, in particular between 0.5 and 3%.
- a silicon content between 0.0 and 1.5, in particular between 0.0 and 1% and a chromium content between 8 and 23%, in particular between 12.0 and 18.0% are provided.
- a nickel content between 1.0 and 10%, in particular between 2 and 6% is added alloyed.
- a good result can be achieved with this welding powder and the welding wire according to the invention, however, sustainable noise reduction becomes possible only when, surprisingly, a certain combination of welding parameters is maintained.
- a welding current should be used which has a current of between 300 and 500 amps, in particular between 370 and 430 amps.
- the voltage of the welding current should be between 20 and 30 volts, in particular between 23 and 26 volts.
- Wire feed rates between 90 and 120 cm / min , in particular between 100 and 115 cm / min are also used according to the invention.
- the adhesive property of the welding track on the upper side of the rail, in particular in the curved area is improved by cutting a groove into the rail before welding.
- a groove can be introduced for example via a special tool that can be moved on the rail and each having a cutting disc for each groove, which is parallel to the direction of travel against the rail engageable.
- the inventive method can be used both in new rails in the manufacturing plant as well as already laid rails on the road.
- the rails are dried before machining, then preferably provided with grooves via the above-mentioned special tool, so that finally can be done with an above-also movable special tool Unterpulverversch spaung with the above parameters.
- the rail can be heated to an elevated temperature prior to applying the weld line. A controlled controlled cooling by reheating the already welded rail is also possible.
- a grinding process can create a flat surface of the partial surfaces formed by the welding path.
- a corrugated surface can also be produced by the grinding, in particular by corrugation parallel to the rail longitudinal direction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Metal Rolling (AREA)
- Machines For Laying And Maintaining Railways (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Railway Tracks (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung einer Schiene mit vermindertem Abrollgeräusch, insbesondere für die Verwendung in Verbindung mit Straßenbahnschienen und insbesondere in Verbindung mit Kurvenschienen, die enge Radien aufweisen, wobei die Lauffläche der Schiene mit zumindest einer, parallel zur Schienenlängsrichtung angeordneten, zusätzlichen Materialschicht versehen wird, die durch Auftragen einer Schweißbahn im Unterpulver-Schweißverfahren (UP) hergestellt wird.The invention relates to a method for producing a rail with reduced rolling noise, in particular for use in conjunction with tram rails and in particular in conjunction with curved rails, which have narrow radii, wherein the running surface of the rail provided with at least one, parallel to the rail longitudinal direction, additional material layer which is produced by applying a welding path in the submerged arc welding process (UP).
Ein solches Verfahren ist aus der
Die Verwendung des Kupfergehalts hatte dabei den besonderen Sinn, einen möglichst großen Schmierungseffekt zu erzielen, um ungewünschte Fahrgeräusche, wie sie insbesondere in sehr engen Kurven auftreten, zu vermeiden. Gerade in dichter Wohnbebauung neigen insbesondere Straßenbahnen auf Grund der sich aus den engen Kurven ergebenden Radien dazu, ein hochfrequentes Quietschen zu erzeugen. Die Ursache für dieses Quietschgeräusch ist nicht vollständig erforscht, wobei sicherlich ein Grund hierfür darin liegt, dass die Kurvenäußeren bei den mit Starrachsen ohne Differential ausgestatteten Straßenbahnwagen eine größere Strecke zurücklegen müssen als die kurveninneren Räder. Dies führt dazu, dass entweder die äußeren oder auch beide Räder während der Kurvenfahrt über die Schiene rutschen oder ruckartig durch die Kurve hindurch gezogen werden.The use of the copper content had the special purpose of achieving the greatest possible lubrication effect, in order to avoid undesired driving noise, as they occur in particular in very tight bends. Especially in dense residential development, in particular trams tend due to the resulting from the tight curves radii to produce a high-pitched squeak. The cause of this squeaking noise has not been fully explored, with certainly a reason for this is that the outer curves in the rigid axles equipped with rigid axles trolley cars have to cover a greater distance than the inside wheels. This causes either the outer or both wheels slip while cornering on the rail or pulled jerkily through the curve.
Ferner kann der so genannte Stick-Slip-Effekt eine Rolle spielen. Im Wesentlichen wird wohl die Geräuschentstehung dem Effekt entsprechen, der auftritt, wenn mit einem nassen Finger über den Rand eines halb gefüllten Weinglases gestrichen wird.Furthermore, the so-called stick-slip effect can play a role. In essence, the noise will probably be the same effect as when a wet finger strokes the edge of a half-filled wine glass.
Bereits in den 60er und 70er Jahren wurden verschiedene Anstrengungen unternommen, um das Quietschen während der Kurvenfahrt zu reduzieren, da sich in dieser Zeit bereits die Anwohnerbeschwerden häuften. Durch die oben genannte Patentanmeldung sollte ein Verfahren geschaffen werden, das hierzu berechtigte Hoffnung weckt.Already in the 60s and 70s, various efforts were made to reduce the squeaking during cornering, as accumulated in this time already the residents' complaints. By the above patent application, a method should be created, which arouses legitimate hope for this purpose.
In der Praxis hat sich das Verfahren allerdings nicht als tauglich erwiesen, da zum einen durch die Versprödung des Schienenkopfes während des Schweißens und durch den damit einhergehenden Abschreckeffekt der Wärmeinflusszonen neben der unmittelbaren Schweißnaht die Schienen brüchig wurden und sehr viele Schienenschäden auftraten. Ferner wurde durch die aufgebrachten Schweißnähte zwar eine Verbesserung beobachtet, jedoch war diese nicht signifikant.In practice, however, the method has not proved to be suitable, since on the one hand by the embrittlement of the rail head during welding and the concomitant quenching effect of Wärmeinflusszonen next to the immediate weld, the rails were brittle and a lot of rail damage occurred. Further, although improvement was observed by the applied welds, this was not significant.
Aus diesem Grunde wurde von dieser Form der Auftragsschweißung wieder Abstand genommen und es wurde zunächst eine Spurweitenverringerung vorgesehen, um eine bessere Führung des Rades und eine mögliche Resonanzwirkung zu unterdrücken. Diese Spurweitenverengung wurde durch Auftragschweißung an den Schienenseiten vorgenommen, wobei allerdings trotz gewisser Erfolge Bedenken gegen die Spurführung dazu führten, dass dieses Verfahren mittlerweile wieder aufgegeben wurde.For this reason, this form of hardfacing was again refrained and it was initially provided a track reduction in order to suppress better guidance of the wheel and a possible resonance effect. This track narrowing was made by surfacing on the rail sides, although, despite some success concerns about the tracking led to this procedure has now been abandoned.
Da derzeit kein wirksames Verfahren zur Reduzierung der hochfrequenten Schwingungsgeräusche vorliegt, wurde zur Reduzierung der immer zunehmenden Anwohnerbeschwerden derzeit ein Gleitbelag auf Ölbasis auf die Schienen aufgebracht. Dieses Verfahren hat nicht nur Probleme bei der Verkehrssicherheit mit sich gebracht, sondern ist auch nur von kurzer Wirkdauer, so dass ein hoher Personalaufwand erforderlich ist, um die Schienen jeweils gleitfähig zu halten.Since there is currently no effective method for reducing the high-frequency vibration noise, an oil-based sliding coating has been used to reduce the ever-increasing local resident complaints applied to the rails. This method not only has problems with road safety, but also has a short duration of action, so that a high manpower is required to keep the rails slidable.
Aufgabe der Erfindung ist es daher, ein einfaches und leicht durchführbares Verfahren zur Herstellung einer Schiene mit verringertem Abrollgeräusch zu schaffen. Technische LösungThe object of the invention is therefore to provide a simple and easy to carry out method for producing a rail with reduced rolling noise. Technical solution
Insbesondere nach Einführung von so genannten Niederflurwagen hat sich gezeigt, dass das Abrollgeräusch in engen Kurven lauter wurde als bisher. Obwohl an sich die Fachwelt gehofft hatte, dass durch Einzelradaufhängung und die damit unterbleibende Geschwindigkeitsdifferenz zwischen den kurveninneren und kurvenäußeren Rädern ein reduzierender Effekt geschaffen werden kann, hat sich leider genau das Gegenteil erwiesen. Die Quietschgeräusche bei Durchfahren enger Radien haben zugenommen. Zusätzlich hat auch die Belastung der Anwohner im Großstadtverkehr durch weitere Fahrgeräusche des Pkw- oder Lkw-Verkehrs zugenommen, so das zunehmend versucht wird, vermeidbare Geräuschquellen zu lokalisieren und auszuschalten.In particular, after the introduction of so-called low-floor vehicles, it has been shown that the rolling noise in louder turns was louder than before. Although the experts had hoped that a reduction effect can be created by independent suspension and the resulting difference in speed between the inside and outside wheels, unfortunately, has proved exactly the opposite. The squeaking noises when passing through narrow radii have increased. In addition, the strain on residents in metropolitan traffic has increased due to further driving noises from car or truck traffic, which is increasingly trying to localize and eliminate avoidable noise sources.
Erfindungsgemäß wird nun das Verfahren der Auftragsschweißung wieder aufgegriffen, obwohl es von der Fachwelt bereits als untauglich angesehen wurde. Es hat sich nämlich herausgestellt, dass durch die Verwendung eines speziellen Schweißdrahtes zum Aufbringen einer oder mehrerer Schweißbahnen in Schienenlängsrichtung im Rahmen eines Unterpulverschweißverfahrens die Probleme des oben genannten Standes der Technik beseitigt werden.According to the process of surfacing is now taken up again, although it has already been considered by the experts to be unfit. It has been found that the use of a special welding wire for applying one or more welding tracks in the rail longitudinal direction in the context of a Unterpulververschweißverfahrens the problems of the above-mentioned prior art are eliminated.
Erfindungsgemäß wird nun als Schweißdraht ein hochlegierter basischer Schweißdraht verwendet, insbesondere wird ein Fülldraht als Schweißdraht verwendet, da sich herausgestellt hat, dass ein Schweißverfahren mit Massivdrähten nicht zum gewünschten Ergebnis führt. Derartige Schweißdrähte werden üblicherweise in der Hochbautechnik eingesetzt, so dass der Fachmann bis zur vorliegenden Erfindung nicht auf den Gedanken gekommen ist, eine solche Materialkombination auch für den Gleisbau zu verwenden.According to the invention, a high-alloyed basic welding wire is now used as the welding wire; in particular, a flux-cored wire is used as the welding wire Welding wire used because it has been found that a welding process with solid wires does not lead to the desired result. Such welding wires are commonly used in building construction, so that the expert has not come up to the present invention on the idea to use such a combination of materials for the track construction.
Der erfindungsgemäße Schweißdraht ist als hochlegierter Schweißdraht mit einem Kohlenstoffanteil zwischen 0,0 und 1,5 %, insbesondere zwischen 0 und 0,5 % versehen. Der Mangananteil beträgt zwischen 0,0 und 5 %, insbesondere zwischen 0,5 und 3 %. Ferner sind ein Siliziumanteil zwischen 0,0 und 1,5, insbesondere zwischen 0,0 und 1 % sowie ein Chromanteil zwischen 8 und 23 %, insbesondere zwischen 12,0 und 18,0 % vorgesehen. Schließlich ist ein Nickelanteil zwischen 1,0 und 10 %, insbesondere zwischen 2 und 6 % hinzu legiert. Mit einem so zusammengesetzten Fülldraht als Schweißdraht kann nun eine dünne Schweißbahn parallel zur Schienenlängsrichtung aufgebracht werden. Bevorzugt werden jedoch zwei oder sogar noch mehr Schweißbahnen nebeneinander, parallel zur Schienenlängsrichtung vorgesehen.The welding wire according to the invention is provided as a high-alloyed welding wire with a carbon content of between 0.0 and 1.5%, in particular between 0 and 0.5%. The manganese content is between 0.0 and 5%, in particular between 0.5 and 3%. Furthermore, a silicon content between 0.0 and 1.5, in particular between 0.0 and 1% and a chromium content between 8 and 23%, in particular between 12.0 and 18.0% are provided. Finally, a nickel content between 1.0 and 10%, in particular between 2 and 6% is added alloyed. With a filler wire thus assembled as a welding wire, a thin welding path can now be applied parallel to the rail longitudinal direction. Preferably, however, two or even more welding tracks are provided next to each other, parallel to the rail longitudinal direction.
Als Schweißpulver wird bevorzugt ein agglomeriertes Schweißpulver der fluoridbasischen Typengruppe verwendet. Dieses Schweißpulver weist bevorzugt folgende Materialkomponenten auf:
- einem SiO2+TiO2-Anteil zwischen 15,0 % und 30,0 %, insbesondere zwischen 17,0 % und 25,0 % und bevorzugt von 20,0 %,
- einem CaO+MgO-Anteil zwischen 25,0 % und 40,0 %, insbesondere zwischen 27,0 % und 35,0 % und bevorzugt von 30,0 %,
- einem Al2O3+MnO-Anteil zwischen 20,0 % und 30,0 %, insbesondere zwischen 23,0 % und 27,0 % und bevorzugt von 25,0 % und
- einem CaF2-Anteil zwischen 15,0 % und 30,0 %, insbesondere zwischen 18,0 % und 22,0 % und bevorzugt von 20,0 %
- a SiO 2 + TiO 2 content between 15.0% and 30.0%, in particular between 17.0% and 25.0% and preferably of 20.0%,
- a CaO + MgO content between 25.0% and 40.0%, in particular between 27.0% and 35.0% and preferably of 30.0%,
- an Al 2 O 3 + MnO content between 20.0% and 30.0%, in particular between 23.0% and 27.0% and preferably of 25.0% and
- a CaF 2 proportion between 15.0% and 30.0%, in particular between 18.0% and 22.0% and preferably of 20.0%
Grundsätzlich kann mit diesem Schweißpulver und dem erfindungsgemäßen Schweißdraht ein gutes Ergebnis erzielt werden, jedoch wird eine nachhaltige Geräuschreduzierung erst dann möglich, wenn überraschenderweise eine bestimmte Kombination von Schweißparametern eingehalten wird. Insbesondere sollte ein Schweißstrom verwendet werden, der eine Stromstärke zwischen 300 und 500 Ampere, insbesondere zwischen 370 und 430 Ampere aufweist. Die Spannung des Schweißstromes sollte zwischen 20 und 30 Volt, insbesondere zwischen 23 und 26 Volt betragen. Erfindungsgemäß werden ferner Drahtvorschubgeschwindigkeiten zwischen 90 und 120 cm/ min, insbesondere zwischen 100 und 115 cm/min verwendet.In principle, a good result can be achieved with this welding powder and the welding wire according to the invention, however, sustainable noise reduction becomes possible only when, surprisingly, a certain combination of welding parameters is maintained. In particular, a welding current should be used which has a current of between 300 and 500 amps, in particular between 370 and 430 amps. The voltage of the welding current should be between 20 and 30 volts, in particular between 23 and 26 volts. Wire feed rates between 90 and 120 cm / min , in particular between 100 and 115 cm / min are also used according to the invention.
Bevorzugt wird die Hafteigenschaft der Schweißspur auf der Oberseite der Schiene, insbesondere im Kurvenbereich, dadurch verbessert, dass vor dem Schweißen eine Nut in die Schiene eingeschnitten wird. Eine solche Nut kann beispielsweise über ein Spezialwerkzeug eingebracht werden, das auf der Schiene verfahrbar ist und für jede Nut jeweils eine Schneidscheibe aufweist, die parallel zur Verfahrrichtung gegen die Schiene anstellbar ist.Preferably, the adhesive property of the welding track on the upper side of the rail, in particular in the curved area, is improved by cutting a groove into the rail before welding. Such a groove can be introduced for example via a special tool that can be moved on the rail and each having a cutting disc for each groove, which is parallel to the direction of travel against the rail engageable.
Das erfindungsgemäße Verfahren kann sowohl bei neuen Schienen im Herstellungswerk als auch bei bereits verlegten Schienen auf der Straße Verwendung finden. Im letztgenannten Fall werden die Schienen vor Bearbeitung getrocknet, anschließend bevorzugt über das oben genannte Spezialwerkzeug mit Nuten versehen, so dass schließlich über ein ebenfalls verfahrbares Spezialwerkzeug die Unterpulververschweißung mit den genannten Parametern erfolgen kann. Um einen Abschreckeffekt und damit eine Versprödung des Materials neben der Schweißbahn zu reduzieren, kann die Schiene vor dem Aufbringen der Schweißbahn auf eine erhöhte Temperatur erhitzt werden. Auch ist ein gezieltes kontrolliertes Abkühlen durch Nacherhitzen der bereits geschweißten Schiene möglich.The inventive method can be used both in new rails in the manufacturing plant as well as already laid rails on the road. In the latter case, the rails are dried before machining, then preferably provided with grooves via the above-mentioned special tool, so that finally can be done with an above-also movable special tool Unterpulververschweißung with the above parameters. To reduce quenching and embrittlement of the material next to the weld line, the rail can be heated to an elevated temperature prior to applying the weld line. A controlled controlled cooling by reheating the already welded rail is also possible.
Nach dem Erkalten der Schweißbahn kann ein Schleifvorgang eine ebene Oberfläche der durch die Schweißbahn gebildeten Teilflächen schaffen. Alternativ zu einer ebenen Oberfläche kann auch eine geriffelte Oberfläche durch das Schleifen hergestellt werden, insbesondere durch Riffelung parallel zur Schienenlängsrichtung. Die erfindungsgemäßeAfter the welding path has cooled down, a grinding process can create a flat surface of the partial surfaces formed by the welding path. As an alternative to a flat surface, a corrugated surface can also be produced by the grinding, in particular by corrugation parallel to the rail longitudinal direction. The inventive
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen.Further features and advantages of the invention will become apparent from the dependent claims.
Claims (10)
- Method for producing a rail with reduced running noise, in particular for use in conjunction with tram rails and in particular in conjunction with curved rails which have tight radii, wherein the running surface of the rail is provided with at least one additional material layer arranged parallel to the longitudinal direction of the rail, which material layer is produced by applying a weld track in a submerged arc welding (SAW) process, characterised in that, as the welding wire, use is made of a high-alloyed, basic welding wire having a C content of between 0.0% and 1.5%, in particular between 0% and 0.5%, an Mn content of between 0.0% and 5.0%, in particular between 0.5% and 3.0%, an Si content of between 0.0% and 1.5%, in particular between 0% and 1.0%, a Cr content of between 8.0% and 23.0%, in particular between 12.0% and 18.0%, and an Ni content of between 1.0% and 10%, in particular between 2.0% and 6.0%.
- Method for producing a rail with reduced running noise according to claim 1, characterised in that a cored wire is used as the welding wire.
- Method for producing a rail with reduced running noise according to claim 1 or 2, characterised in that, as the powder for the submerged arc welding process, use is made of an agglomerated welding powder of the fluoride-basic type group having an SiO2+TiO2 content of between 15.0% and 30.0%, in particular between 17.0% and 25.0% and preferably of 20.0%, a CaO+MgO content of between 25.0% and 40.0%, in particular between 27.0% and 35.0% and preferably of 30.0%, an Al2O3+MnO content of between 20.0% and 30.0%, in particular between 23.0% and 27.0% and preferably of 25.0%, and a CaF2 content of between 15.0% and 30.0%, in particular between 18.0% and 22.0% and preferably of 20.0%.
- Method for producing a rail with reduced running noise according to one of the two preceding claims, characterised in that the welding is carried out using a welding current which has an amperage of between 300 and 500 amperes, in particular between 370 and 430 amperes.
- Method for producing a rail with reduced running noise according to one of the preceding claims, characterised in that the welding current has a voltage of between 20 and 30 Volt, in particular between 23 and 26 Volt.
- Method for producing a rail with reduced running noise according to one of the preceding claims, characterised in that the wire feed speed for the welding current is between 90 cm/min and 120 cm/min, in particular between 100 cm/min and 115 cm/min.
- Method for producing a rail with reduced running noise according to one of the preceding claims, characterised in that, before applying the weld track, at least one groove is stamped or cut into the rail below the weld track.
- Method for producing a rail with reduced running noise according to one of the preceding claims, characterised in that the rail is heated to an increased temperature before applying the weld track.
- Method for producing a rail with reduced running noise according to one of the preceding claims, characterised in that the weld track is ground down after cooling in order to produce a flat surface.
- Method for producing a rail with reduced running noise according to one of the preceding claims, characterised in that two weld tracks which are parallel to one another are applied.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005029005A DE102005029005B3 (en) | 2005-06-21 | 2005-06-21 | Rail production method for a tram rail reduces wheel tread noise on tram rails, especially on curved rails with narrow radii |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1736600A1 EP1736600A1 (en) | 2006-12-27 |
| EP1736600B1 true EP1736600B1 (en) | 2009-08-19 |
Family
ID=36829877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06115746A Not-in-force EP1736600B1 (en) | 2005-06-21 | 2006-06-20 | Method for producing a noise-abating rail |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1736600B1 (en) |
| AT (1) | ATE440178T1 (en) |
| DE (2) | DE102005029005B3 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2554704C3 (en) * | 1975-12-05 | 1979-05-23 | Elektro-Thermit Gmbh, 4300 Essen | Noise-reducing rail |
| DE3829340C1 (en) * | 1988-08-30 | 1989-10-12 | Elektro-Thermit Gmbh, 4300 Essen, De | |
| DE4241607C1 (en) * | 1992-12-10 | 1994-02-10 | Elektro Thermit Gmbh | Rail with a recess running in the middle of the rail head in the longitudinal direction of the rail, which is filled with non-rail material |
| DE59609164D1 (en) * | 1995-11-23 | 2002-06-06 | Jinpo Pluls A S | METHOD FOR WELDING THE RAILS |
-
2005
- 2005-06-21 DE DE102005029005A patent/DE102005029005B3/en not_active Expired - Fee Related
-
2006
- 2006-06-20 DE DE502006004568T patent/DE502006004568D1/en active Active
- 2006-06-20 AT AT06115746T patent/ATE440178T1/en active
- 2006-06-20 EP EP06115746A patent/EP1736600B1/en not_active Not-in-force
Also Published As
| Publication number | Publication date |
|---|---|
| ATE440178T1 (en) | 2009-09-15 |
| DE102005029005B3 (en) | 2006-10-12 |
| DE502006004568D1 (en) | 2009-10-01 |
| EP1736600A1 (en) | 2006-12-27 |
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