Loading patent…
AssigneeSociete Nationale Des Chemins De Fer Francais Sncf
InventorsArnaud Lorieux, Claude Monnet, Serge Detain, Rémy Delolmo
Estimating the term…
Method for the aluminothermic welding of rails, involving the steps of:—triggering an aluminothermic reaction in a crucible,—pouring the metal resulting from said reaction into the mould so as to fill the moulding cavity from the rail flange,—after filling the cavity, triggering a second aluminothermic reaction above the rail head, and pouring the metal resulting from said reaction into the cavity in the region of the rail head. The mould used in the method is designed to fit over the ends of two rails to form a moulding cavity comprising a crucible positioned above the rail head region so that it can be fed with molten metal of the cavity via a secondary passage.
A process for welding two longitudinal rail sections including:
A welding mold for two longitudinal rail sections configured to be placed on said rail sections and defining a weld volume configured, on the one hand, to receive the liquid welding metal and, on the other hand, such that the space defined by the weld volume in its lower half is greater than the space defined by the welding volume in its upper half.
An assembly formed by two longitudinal rail sections placed consecutively and a weld, part of which is placed between the two rail sections, such that the weld width is larger at its base than at its median portion.
Dependencies are inferred from the claim text.