EP0533528B1 - Improved frog and method for its production - Google Patents
Improved frog and method for its production Download PDFInfo
- Publication number
- EP0533528B1 EP0533528B1 EP19920402447 EP92402447A EP0533528B1 EP 0533528 B1 EP0533528 B1 EP 0533528B1 EP 19920402447 EP19920402447 EP 19920402447 EP 92402447 A EP92402447 A EP 92402447A EP 0533528 B1 EP0533528 B1 EP 0533528B1
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- EP
- European Patent Office
- Prior art keywords
- central part
- wings
- slab
- frog
- crossing
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000005096 rolling process Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 2
- 238000003754 machining Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 244000245420 ail Species 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 208000026817 47,XYY syndrome Diseases 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 241001080024 Telles Species 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B7/00—Switches; Crossings
- E01B7/10—Frogs
- E01B7/12—Fixed frogs made of one part or composite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K7/00—Making railway appurtenances; Making vehicle parts
- B21K7/02—Making railway appurtenances; Making vehicle parts parts for permanent way
Definitions
- the invention relates to crossing hearts for railways, in particular tramways, and their manufacturing process.
- crossing hearts have been proposed for tramway track apparatus made of cast steel.
- This solution is known to be expensive because it requires various and numerous foundry molds, adapted to the various situations, and also long manufacturing times.
- Another proposed solution consists in making crossing hearts from rolled steel.
- raw rolling blocks are used which are then machined for example by milling, in order to spare therein in particular the rolling surfaces of what takes the place of fungus, the hare's feet, the grooves ruts as well as the parts in end needed for connections to the rails that surround it.
- Such a solution is for example described in the document BE 899 679.
- the object of the invention is to remedy this type of difficulty by reconciling different apparently contradictory objectives, that is to say using the minimum of material while obtaining a homogeneous one-piece, seamless crossing core, the parts of which are more stressed are subjected, if necessary, to treatments increasing their longevity.
- the subject of the invention is also a crossing core for railways, in particular tramways, obtained by the manufacturing process in question.
- a treatment is then carried out, for example thermal which allows , by sufficiently increasing the hardness of this part, to give it greater longevity.
- Another technique which makes it possible to increase the local hardness of the crossing core consists of a supply of an appropriate metal deposited for example by welding in the region concerned. Machining is then carried out accordingly.
- the location of the regions to be hardened is different in the case of the deep rut and in the case of the carrier rut, but either of the hardening techniques indicated above can be applied to both cases.
- Figure 1 shows a laminated slab, or a special profile 10, in its initial state which has been given in width, a dimension of 0.35 m for example and on which we have shown the longitudinal axis 100 preferably the plane of symmetry along which the slab will be partially split, over a distance AB and CD, in its end zones 11 located on either side of a central part 12. thus by this partial slitting of the adjacent wings 110 in pairs as illustrated on the right part of this figure.
- the distances AB and CD can be equal or different.
- Slitting is obtained using any suitable known technique, for example sawing or cutting with a torch.
- the spacing is likewise obtained by any suitable technique by forging or deformation with a hydraulic press for example.
- Figure 2 shows a crossing heart finished according to the invention seen from above after slitting along the axis 100 and spacing of the adjacent wings 110, machining and processing done.
- the grooves machined for the wheel band or flange have been designated by 30 and by 40 the machined ends for connection, for example by splicing or welding with the rows of rails of the running track which will frame it.
- the spacing can be the same or different at each end.
- Figure 3A shows a partial section along line 3-3 of Fig.2 in the case of a load-bearing rut.
- Figure 3B shows a partial section along line 3-3 in Fig. 2 in the case of a deep rut.
- the shaded areas 32, 33 and 34 are those to be hardened in the case of the supporting rut and in the case of the deep rut, respectively.
- Machining is done in any suitable manner, for example by milling using a machine tool.
- the heat or other treatment is carried out according to any appropriate standard technique.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Sewing Machines And Sewing (AREA)
- Heat Treatment Of Articles (AREA)
- Road Paving Structures (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Metal Rolling (AREA)
- Body Structure For Vehicles (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Description
L'invention concerne les coeurs de croisement pour voie ferroviaire notamment de tramway et leur procédé de fabrication.The invention relates to crossing hearts for railways, in particular tramways, and their manufacturing process.
L'implantation de voies ferrées de tramways en site "banalisé", au sens de ce terme en matière de travaux publics, rend nécessaire l'utilisation de rails particuliers à profils spéciaux dits "rails à gorge". Les véhicules ferroviaires qui sont aptes à circuler sur de telles voies suivent habituellement des trajectoires rectilignes ou courbes de petits rayons et les appareils de voie destinés aux tramways sont donc des appareils à "grand angle" c'est-à-dire que les files de rails de même "main" divergent ou convergent et que les files de rails de "mains" opposées se coupent en faisant des angles importants. Les appareils de voie en question sont, par conséquent, courts en comparaison des appareils de voie traditionnels ou pour très grandes vitesses.The installation of tram tracks on a "standard" site, in the sense of this term in terms of public works, makes it necessary to use special rails with special profiles called "grooved rails". Railway vehicles which are capable of running on such tracks usually follow rectilinear or curved trajectories of small radii and the track devices intended for trams are therefore "wide angle" devices, that is to say that the lines of rails of the same "hand" diverge or converge and the lines of rails of opposite "hands" intersect at large angles. The switches in question are therefore short compared to traditional switches or for very high speeds.
Sur le plan de leur construction, les coeurs de croisement du type visé par l'invention posent des problèmes variés.In terms of their construction, the crossing hearts of the type targeted by the invention pose various problems.
Un de ces problèmes tient à la situation en chaussée de ces coeurs qui rend peu recommandable une construction en rails assemblés, dont l'entretien ne serait pratiquement pas réalisable.One of these problems is the situation on the roadway of these hearts which makes it impractical to build assembled rails, the maintenance of which would be practically impossible.
Un autre de ces problèmes tient du fait que si le grand angle de croisement conduit à un coeur court dans le sens longitudinal de la direction des voies, il génère, par contre, dans le sens transversal à la directions des voies un coeur large à ses extrémités, entre les files de rails de "mains" opposées.Another of these problems is due to the fact that if the large crossing angle leads to a short core in the longitudinal direction of the direction of the tracks, it generates, on the other hand, in the direction transverse to the directions of the tracks a wide heart at its ends, between the rows of rails of opposite "hands".
Un autre de ces problèmes est lié à la conception des bandages des roues de tramways qui sont d'une manière générale plus étroits que ceux des véhicules ferroviaires courants et entraînent alors parfois la nécessité de faire porter le boudin ou mentonnet des bandages des roues sur le fond d'ornière des gorges de l'appareil alors que cette obligation n'existe pas avec les bandages larges.Another of these problems is related to the design of treads for tramway wheels which are generally narrower than those of vehicles. common rail and sometimes lead to the need to wear the flange or wheel band tires on the rut of the grooves of the device when this obligation does not exist with wide tires.
Pour faire face à ce type de difficultés on a proposé des coeurs de croisement pour appareils de voies de tramways faits en acier moulé. Cette solution est connue pour être onéreuse parce qu'elle exige des moules de fonderie variés et nombreux, adaptés aux diverses situations, et aussi des délais importants de fabrication.To cope with this type of difficulty, crossing hearts have been proposed for tramway track apparatus made of cast steel. This solution is known to be expensive because it requires various and numerous foundry molds, adapted to the various situations, and also long manufacturing times.
Une autre solution proposée consiste à faire des coeurs de croisement à partir d'acier laminé. Pour cette solution, on utilise des blocs bruts de laminage qui sont ensuite usinés par exemple par fraisage, pour y ménager notamment les surfaces de roulement de ce qui tient lieu de champignon, les pattes de lièvre, les ornières des gorges ainsi que les parties en bout nécessaires aux raccordements aux files de rails qui l'encadrent. Une telle solution est par exemple décrite dans le document BE 899 679.Another proposed solution consists in making crossing hearts from rolled steel. For this solution, raw rolling blocks are used which are then machined for example by milling, in order to spare therein in particular the rolling surfaces of what takes the place of fungus, the hare's feet, the grooves ruts as well as the parts in end needed for connections to the rails that surround it. Such a solution is for example described in the document BE 899 679.
La mise en oeuvre pratique de cette solution impose d'utiliser des blocs dont la largeur avoisine voire dépasse 0,50m.The practical implementation of this solution requires the use of blocks whose width is close to or even exceeds 0.50m.
Une autre solution est encore proposée par le document FR 697 294. Selon cette solution, pour fabriquer seulement une pointe de coeur d'un appareil de voie ferroviaire en rail classique, on part d'un profilé de configuration générale parallélépipédique et de dimensions convenables qui après diverses opérations est porté à la forme finale voulue en pointe par un usinage correspondant qui consiste à en éliminer une portion de configuration générale prismatique.Another solution is also proposed by the document FR 697 294. According to this solution, to manufacture only a core tip of a railroad track apparatus in conventional rail, one starts from a profile of general parallelepiped configuration and of suitable dimensions which after various operations, it is brought to the final desired shape at the point by a corresponding machining which consists in eliminating a portion of it with a general prismatic configuration.
On se rend compte immédiatement que pour une telle construction, on utilise une quantité de matière sans rapport avec celle qui est réellement nécessaire au roulement et à la stabilité du coeur.We immediately realize that for such a construction, we use a quantity of material unrelated to that which is really necessary for the rolling and the stability of the heart.
Pour faire face à une telle solution on a aussi proposé de fabriquer des coeurs de croisement composites en utilisant des blocs laminés plus petits, de largeur et longueur réduites, par exemple d'environ 0,30m de large, dans lesquels on usine notamment les gorges et sur lesquels on vient rapporter en bout par soudage des "antennes" en rail à profil spécial nécessaires aux raccordements aux files de rails qui l'encadrent. Si on économise ainsi de la matière, on introduit en contrepartie des soudures qui sont sujettes à malfaçons et sont sources de ruptures et, qui plus est, imposent des opérations supplémentaires qui grèvent les coûts de production.To cope with such a solution, it has also been proposed to manufacture composite crossing hearts using smaller laminated blocks, of reduced width and length, for example about 0.30 m wide, in which the grooves are machined in particular. and on which one comes to report at the end by welding of "antennas" in special profile rail necessary for connections to the rails that surround it. If material is saved in this way, welds are introduced in return, which are prone to poor workmanship and are sources of ruptures and, moreover, impose additional operations which increase production costs.
Le but de l'invention est de remédier à ce type de difficultés en conciliant différents objectifs apparamment contradictoires, c'est-à-dire utiliser le minimum de matière tout en obtenant un coeur de croisement homogène monobloc, sans soudure, dont les parties les plus sollicitées sont soumises s'il y a lieu, à des traitements augmentant leur longévité.The object of the invention is to remedy this type of difficulty by reconciling different apparently contradictory objectives, that is to say using the minimum of material while obtaining a homogeneous one-piece, seamless crossing core, the parts of which are more stressed are subjected, if necessary, to treatments increasing their longevity.
On obtient ainsi un coeur de croisement à la fois plus performant et d'un prix de revient plus réduit que les précédents.This gives a crossover core that is both more efficient and at a lower cost price than the previous ones.
L'invention a pour objet un procédé pour la fabrication d'un coeur de croisement en rail à gorge pour voie ferroviaire de tramway à partir d'une brame laminee unique de préférence approximativement parallélépipédique, caractérisé en ce qu':
- on refend partiellement longitudinalement, axialement la brame dans ses deux zones d'extrémités encadrant une partie centrale pour y ménager quatre ailes contigües deux à deux,
- on écarte les ailes contigües en dépassant la limite élastique pour donner une déformation permanente à la brame telle que sa dimension transversale est celle des extrémités du coeur de croisement à obtenir,
- on usine la partie centrale, les ailes et au besoin les bouts de celles-ci pour y ménager notamment les gorges et des surfaces de roulement et s'il y a lieu des raccords.
- the slab is partially partially longitudinally slit axially in its two end zones framing a central part in order to provide four contiguous wings there in pairs,
- the adjoining wings are spread apart by exceeding the elastic limit to give a permanent deformation to the slab such that its transverse dimension is that of the ends of the crossing core to be obtained,
- the central part, the wings and, if necessary, the ends of the latter are machined in order to provide in particular the grooves and the rolling surfaces and if necessary fittings.
L'invention a aussi pour objet un coeur de croisement pour voie ferroviaire notamment de tramway obtenu par le procédé de fabrication en question.The subject of the invention is also a crossing core for railways, in particular tramways, obtained by the manufacturing process in question.
Pour ce faire, on part d'une brame laminée, de configuration approximativement parallélépipédique ou d'un profil spécial, dont la longueur est voisine de celle du coeur terminé à obtenir et dont la largeur est la plus petite possible compatible avec la partie centrale du coeur à obtenir. On fend partiellement longitudinalement, de préférence selon le plan axial de symétrie, les deux zones d'extrémités de la brame qui deviendront le côté "pointe" et le côté "talon" du coeur pour y ménager quatre ailes, sur la longueur nécessaire. On écarte ensuite les ailes contigües ainsi obtenues pour donner à la brame une configuration en double Y opposé ou en X en dépassant la limite élastique du matériau pour obtenir une déformation permanente de la brame conduisant à la dimension transversale nécessaire entre les extrémités du coeur à obtenir, et on usine la partie centrale et les ailes pour y ménager notamment les gorges ainsi que les bouts des ailes en vue de leur raccordement aux files de rails de la voie courante gui l'encadreront.To do this, we start from a laminated slab, of approximately parallelepiped configuration or from a special profile, whose length is close to that of the finished core and whose width is as small as possible compatible with the central part of the heart to get. The two end regions of the slab are split partially longitudinally, preferably along the axial plane of symmetry, which will become the "toe" side and the "heel" side of the core in order to provide four wings, over the necessary length. We then separate the adjoining wings thus obtained to give the slab a configuration in opposite double Y or in X by exceeding the elastic limit of the material to obtain a permanent deformation of the slab leading to the necessary transverse dimension between the ends of the core to be obtained , and the central part and the wings are machined in order to spare therein in particular the grooves as well as the ends of the wings with a view to their connection to the rows of rails of the current track which will frame it.
Pour donner au coeur de croisement notamment dans sa partie centrale qui est la plus sollicitée, une résistance plus importante que celle de l'acier qui constitue la brame ou le profil spécial initial de départ, on procède ensuite à un traitement par exemple thermique qui permet, en augmentant suffisamment la dureté de cette partie, de lui conférer une plus grande longévité.To give the crossing core, particularly in its central part which is the most stressed, a higher resistance than that of the steel which constitutes the slab or the initial special starting profile, a treatment is then carried out, for example thermal which allows , by sufficiently increasing the hardness of this part, to give it greater longevity.
Une autre technique qui permet d'augmenter la dureté locale du coeur de croisement consiste en un apport d'un métal approprié déposé par exemple par soudage dans la région concernée. Les usinages sont alors réalisés en conséquence.Another technique which makes it possible to increase the local hardness of the crossing core consists of a supply of an appropriate metal deposited for example by welding in the region concerned. Machining is then carried out accordingly.
La forme exacte particulière à donner à un coeur de croisement (ornière profonde ou ornière porteuse) dépend de la forme propre du bandage des roues destinées à y circuler.The exact particular shape to be given to a crossing heart (deep rut or supporting rut) depends on the proper shape of the tire of the wheels intended to circulate there.
La localisation des régions à durcir est différente dans le cas de l'ornière profonde et dans le cas de l'ornière porteuse, mais l'une et l'autre des techniques de durcissement indiquées auparavant peuvent être appliquées aux deux cas.The location of the regions to be hardened is different in the case of the deep rut and in the case of the carrier rut, but either of the hardening techniques indicated above can be applied to both cases.
D'autres caractéristiques de l'invention ressortiront de la lecture de la description et des revendications qui suivent ainsi que de l'examen du dessin, donné seulement à titre d'exemple, où :
- la Fig.1 est une vue en perspective schématique illustrant un coeur de croisement en cours de fabrication selon l'invention,
- la Fig.2 est une vue de dessus d'un coeur de croisement obtenu directement par la mise en oeuvre du procédé selon l'invention, et
- les Fig.3A et 3B sont des sections selon le plan 3-3 de la Fig.2 de deux variantes d'exécution.
- Fig.1 is a schematic perspective view illustrating a crossing core during manufacture according to the invention,
- FIG. 2 is a top view of a crossing core obtained directly by the implementation of the method according to the invention, and
- Fig.3A and 3B are sections according to the plane 3-3 of Fig.2 of two alternative embodiments.
Les coeurs de croisement pour voie ferroviaire notamment de tramway étant bien connus dans la technique, on ne décrira dans ce qui suit que ce qui concerne directement ou indirectement l'invention.Since crossing hearts for railways and in particular tramways are well known in the art, the following will only describe what relates directly or indirectly to the invention.
Pour le surplus le spécialiste de la technique considérée puisera dans les solutions courantes classiques à sa disposition pour faire face aux problèmes particuliers auxquels est confronté.For the rest, the specialist in the technique considered will draw on the conventional current solutions at his disposal to deal with the particular problems which are confronted.
Dans ce qui suit on utilise toujours un même numéro de référence pour identifier un élément homologue quel que soit le mode de réalisation ou la variante d'exécution.In what follows we always use the same reference number to identify a homologous element whatever the embodiment or the variant of execution.
Pour la commodité de l'exposé on exposera successivement chacune des particularités de l'invention.For the convenience of the presentation, each of the features of the invention will be exposed successively.
On comprendra mieux l'invention en se reportant à la Figure 1 qui représente une brame laminée, ou un profil spécial 10, dans son état initial à laquelle on a donné en largeur, une dimension de 0,35m par exemple et sur laquelle on a représenté l'axe longitudinal 100 de préférence le plan de symétries suivant lequel la brame sera partiellement fendue, sur une distance AB et CD, dans ses zones d'extrémités 11 situées de part et d'autre d'une partie centrale 12. On ménage ainsi par ce refendage partiel des ailes 110 contigües deux à deux comme illustré sur la partie droite de cette figure. Les distances AB et CD peuvent être égales ou différentes.We will better understand the invention by referring to Figure 1 which shows a laminated slab, or a
Ensuite on écarte dans le sens des flèches les ailes contigües 110 d'un couple pour aboutir comme illustré sur la partie gauche de cette figure. L'écartement des deux couples est simultané ou successif.Then we spread in the direction of the arrows the
Le refendage est obtenu à l'aide de toute technique connue appropriée par exemple sciage ou découpage au chalumeau. L'écartement est obtenu de même par toute technique appropriée par forgeage ou déformation à la presse hydraulique par exemple.Slitting is obtained using any suitable known technique, for example sawing or cutting with a torch. The spacing is likewise obtained by any suitable technique by forging or deformation with a hydraulic press for example.
La Figure 2 représente un coeur de croisement terminé selon l'invention vue de dessus après refendage suivant l'axe 100 et écartement des ailes 110 contigües, usinages et traitements faits. On a désigné par 30 les gorges usinées pour mentonnet ou boudin de bandage de roue et par 40 les bouts usinés pour raccordement par exemple par éclissage ou soudage avec les files de rails de la voie courante qui l'encadreront. L'écartement peut être le même ou différent à chaque extrémité.Figure 2 shows a crossing heart finished according to the invention seen from above after slitting along the
La Figure 3A représente une section partielle selon la ligne 3-3 de la Fig.2 dans le cas d'une ornière porteuse. La Figure 3B représente une section partielle selon la ligne 3-3 de la Fig.2 dans le cas d'une ornière profonde.Figure 3A shows a partial section along line 3-3 of Fig.2 in the case of a load-bearing rut. Figure 3B shows a partial section along line 3-3 in Fig. 2 in the case of a deep rut.
Sur les Figures 2 et 3 les plages 32, 33 et 34 en grisé sont celles à durcir dans le cas de l'ornière porteuse et dans le cas de l'ornière profonde, respectivement.In Figures 2 and 3 the
L'usinage est fait de toute manière appropriée par exemple par fraisage à l'aide de machine outil.Machining is done in any suitable manner, for example by milling using a machine tool.
De même le traitement, thermique ou autre est conduit selon toute technique courante appropriée.Likewise, the heat or other treatment is carried out according to any appropriate standard technique.
De ce qui précède on comprend tous les avantages apportés par l'invention.From the above we understand all the advantages provided by the invention.
Claims (4)
- Process for manufacturing a grooved-rail frog for a tramline, from a single, preferably approximately parallelepipedonal, rolled slab, characterised in that
the slab (10) is axially split (100) along part of its length in its two end zones (11) enclosing a central part (12) so as to define four wings (110) which adjoin one another in pairs,
the adjoining wings (110) are moved apart,thereby exceeding the elastic limit, so as to impart permanent deformation to the slab (10) such that its transverse dimension equals that of the ends of the frog which is to be produced,
the central part (12), the wings (110) and if necessary the ends (40) of the latter are machined so as to define, in particular, the grooves (30) and rolling surfaces (32, 33, 34) and, optionally, connections. - Process according to claim 1, characterised in that at least the central part (12) is heat-treated in order to increase its hardness.
- Process according to claim 1 or 2, characterised in that a metal is added to the grooves (30) and/or rolling surfaces (32, 33, 34) at least in the central part (12).
- Frog for a tramline, characterised in that it is obtained by carrying out the process according to any one of claims 1 to 3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9111652A FR2681618B1 (en) | 1991-09-20 | 1991-09-20 | IMPROVED CROSSOVER HEART AND PROCESS FOR ITS MANUFACTURE. |
| FR9111652 | 1991-09-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0533528A1 EP0533528A1 (en) | 1993-03-24 |
| EP0533528B1 true EP0533528B1 (en) | 1995-06-07 |
Family
ID=9417168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19920402447 Expired - Lifetime EP0533528B1 (en) | 1991-09-20 | 1992-09-07 | Improved frog and method for its production |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0533528B1 (en) |
| DE (1) | DE69202842T2 (en) |
| EG (1) | EG19446A (en) |
| ES (1) | ES2073892T3 (en) |
| FI (1) | FI98846C (en) |
| FR (1) | FR2681618B1 (en) |
| NO (1) | NO300814B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1138830A2 (en) | 2000-03-30 | 2001-10-04 | BWG Butzbacher Weichenbau Gesellschaft mbH & Co. KG | Grooved rail frog and method of production thereof |
| DE10015522B4 (en) * | 2000-03-30 | 2012-03-29 | Bwg Gmbh & Co. Kg | Grooved rail frog and method for producing such |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011018351B4 (en) * | 2011-04-20 | 2015-03-12 | Heinrich Krug GmbH & Co. KG | Centerpiece for switches |
| DE102011100488A1 (en) * | 2011-05-04 | 2012-11-08 | Vossloh Laeis Gmbh & Co.Kg | Overflow heart |
| CN109082950A (en) * | 2018-09-17 | 2018-12-25 | 四川易亨机械制造有限公司 | A kind of wear-resisting steel fork core structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR697294A (en) * | 1929-06-19 | 1931-01-15 | Rail joint devices, for example, needle core pieces, crossovers, etc. | |
| LU87503A1 (en) * | 1989-04-21 | 1989-09-12 | Kihn Sarl | METHOD FOR MANUFACTURING NEEDLES FOR THROAT RAILS AND ONE-PIECE NEEDLE CARRIED OUT BY THIS PROCESS |
-
1991
- 1991-09-20 FR FR9111652A patent/FR2681618B1/en not_active Expired - Fee Related
-
1992
- 1992-09-07 DE DE1992602842 patent/DE69202842T2/en not_active Expired - Fee Related
- 1992-09-07 ES ES92402447T patent/ES2073892T3/en not_active Expired - Lifetime
- 1992-09-07 EP EP19920402447 patent/EP0533528B1/en not_active Expired - Lifetime
- 1992-09-17 EG EG54892A patent/EG19446A/en active
- 1992-09-18 FI FI924192A patent/FI98846C/en active IP Right Grant
- 1992-09-21 NO NO923652A patent/NO300814B1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1138830A2 (en) | 2000-03-30 | 2001-10-04 | BWG Butzbacher Weichenbau Gesellschaft mbH & Co. KG | Grooved rail frog and method of production thereof |
| DE10015522B4 (en) * | 2000-03-30 | 2012-03-29 | Bwg Gmbh & Co. Kg | Grooved rail frog and method for producing such |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2073892T3 (en) | 1995-08-16 |
| NO923652D0 (en) | 1992-09-21 |
| DE69202842D1 (en) | 1995-07-13 |
| FR2681618B1 (en) | 1993-11-26 |
| EG19446A (en) | 1995-03-30 |
| FI924192A0 (en) | 1992-09-18 |
| NO300814B1 (en) | 1997-07-28 |
| NO923652L (en) | 1993-03-22 |
| FR2681618A1 (en) | 1993-03-26 |
| FI98846B (en) | 1997-05-15 |
| FI98846C (en) | 1997-08-25 |
| EP0533528A1 (en) | 1993-03-24 |
| DE69202842T2 (en) | 1995-11-30 |
| FI924192A (en) | 1993-03-21 |
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