Non-contact strip guiding
AssigneeANDRITZ Sundwig GmbH
InventorsKlaus Boguslawsky, Jurgen Albrecht
Life of this patent
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Abstract
A process and apparatus for controlling the strip run (4) of a metal strip (10) through a floating furnace (3). The strip run (4) is controlled contact-free with the aid of an electromagnetic device (1) that generates a Lorentz force acting transversely to the strip run.
Claims15
A method for controlling transverse horizontal deviation of a metal strip defining a level passing horizontally in a running direction on air cushions through a floating furnace, comprising:
- sensing a transverse position of the strip at a location along the running direction;
- and in response to a sensed deviation in the transverse position of the strip, controlling the transverse position of the running strip with contact-free forces applied by a controlled electromagnetic field, wherein
- said controlled electromagnetic field is generated by a fixed AC electromagnet device;
- the metal strip is a nonferrous metal strip;
- and
- the electromagnet device induces eddy currents in the strip, which in turn create another magnetic field that interacts with the magnetic field of the electromagnet device to produce a Lorentz force on the level of the strip in a direction transverse to the strip running direction.
A method for controlling transverse horizontal deviation of a metal strip defining a level passing horizontally in a running direction on air cushions through a treatment station, comprising:
- subjecting the running strip to Lorentz forces acting transversely to the running direction, wherein
- a primary electromagnetic field is generated by an AC electromagnet device;
- the metal strip is a nonferrous metal strip;
- and
- the electromagnet device induces eddy currents in the strip, which in turn create another magnetic field that interacts with the primary magnetic field of the electromagnet device to produce the Lorentz force on the level of the strip in a direction transverse to the strip running direction.
The method according to 6, wherein the electromagnetic device includes coils and a cooling medium is passed through the coils.
A device for controlling a metal strip defining a level running in a running direction within a floating furnace, comprising:
- a running strip position sensor;
- and adjustable AC electromagnets responsive to the position sensor, arranged inside the floating furnace in spaced vertical alignment with the metal strip, for generating a Lorentz force acting on the metal strip transversely to the running strip on the level of the strip run, wherein
- a primary electromagnetic field is generated by the AC electromagnets;
- the metal strip is a nonferrous metal strip;
- and
- the primary electromagnetic field generates eddy currents in the strip, which in turn create another magnetic field that interacts with the primary magnetic field to produce the Lorentz force on the level of the strip in a direction transverse to the strip running direction.
Dependencies are inferred from the claim text.