Unimetal

Societe Anonyme Dite: Sacilor

Andre Faessel

Yves Bourdon

Raymond-Yves Deroche

Jean-Claude Valetti

Claude Pochon

Jean-Pierre Mazzocco

In this method preformed turns of the wire are made to fall into a coil-forming pit having a substantially cylidrical wall with a vertical axis where they are superimposed and form a coil. In the course of the fall of the turns, there is exerted on the latter a radial force of attraction toward the wall of the pit, the direction of this force undergoing a motion of rotation about the axis of the pit. The force of attraction is preferably produced by a rotating magnetic field. For this purpose, the device comprises means for exerting on the turns said force undergoing a motion of rotation, these means comprising inductors such as electromagnets (5) which are evenly spaced apart on the periphery of the pit, and means for cyclically feeding dc current to these electromagnets. The invention is applied to the forming of coils of wires of magnetic metal, in particular steel.

Method and device for forming coils of metal wire

The steel rail is submitted to a tensile stress exceeding the conventional 0.2% offset yield strength of the steel, up to a stress value corresponding to a total plastic deformation of the whole rail.

Straightened rail

Method for straightening a rail and straightened rail

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Saint Nicolas en Foret, France

Andre Faessel