Method and device for forming coils of metal wire
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United States of America Patent
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Sep 1, 1992
Grant Date -
N/A
app pub date -
Jan 22, 1991
filing date -
Feb 12, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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