Method of regulating the stress distribution in metal strips or sheet, especially of nonferromagnetic metals
AssigneeBWG Bergwerk- und Walzwerk-Maschinenbau GmbH
InventorsRolf Noe, Andreas Noe
Life of this patent
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Abstract
A strip line or line for processing nonferrous metal sheets and plates has linear motor stators provided for contactless adjustment of the tension or stress distribution in response to planarity and profile measurements.
Claims13
A method of controlling a stress distribution in a continuously traveling workpiece selected from the group which consists of metal strip or plates having a travel direction and during the travel of the workpiece along a strip-processing line, said method comprising the steps of:
- at least along one segment of said line juxtaposing a linear induction motor stator with said workpiece so that said workpiece forms an armature for said stator;
- selectively orienting said stator relative to said travel direction longitudinally and transversely;
- energizing said stator with electrical power and in a selected current-flow direction to contactlessly increase or lower workpiece stress selectively in a longitudinal and transverse direction;
- detecting the stress distribution in the workpiece in the course of a strip profile or planarity measurement thereon;
- and
- controlling at least one of the power supplied to said stator and the current flow direction through said stator in dependence upon said measurement so as to impart a uniform stress distribution and improved planarity to said workpiece.
An apparatus for controlling a tension distribution in a continuously travelling workpiece selected from the group which consists of metal strip or plates having a travel direction and during the travel of the workpiece along a strip-processing line, said apparatus comprising:
- means for displacing said workpiece continuously in said travel direction;
- a linear induction motor stator juxtaposed with said workpiece along with at least one segment with said stress processing line and selectively oriented longitudinally or transversely to said travel direction;
- means for energizing said stator with electrical power and in a selected current flow direction to contactlessly increase or lower workpiece tension selectively in a longitudinal and transverse direction;
- means for measuring the tension distribution in said workpiece and including a profile measuring unit and/or planarity measuring roller;
- and
- electronic control means responsive to said means for measuring for controlling said stator with corresponding signals to improve uniformity of the tension distribution.
Dependencies are inferred from the claim text.