Improving the thickness accuracy of cold rolled narrow strip by piezoelectric roll gap control at high rolling speed |
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Authors: | Sven Stockert Matthias Wehr Johannes Lohmar Gerhard Hirt Dirk Abel |
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Affiliation: | 1. Institute of Metal Forming (IBF), RWTH Aachen University, 52056 Aachen, Germany;2. Institute of Automatic Control (IRT), RWTH Aachen University, 52074 Aachen, Germany |
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Abstract: | Particularly in fast rolling mills, conventional actuators reach their dynamic limits, when longitudinal thickness variations of the incoming strip shall be reduced with high accuracy by model-predictive roll gap control. Accordingly, the applicability of highly dynamic piezoelectric actuators in combination with electromechanical spindles and a high frequency precision measurement of the thickness in front of the roll gap was examined. Rolling tests in a cold rolling mill for narrow slit strips show that this novel concept is suitable to provide the required dynamic actuation especially at high rolling speed. |
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Keywords: | Rolling Piezoelectric Accuracy |
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