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The output of discontinuous cold rolling tandem mills depends to a great extent on non-productive time. The aim of this project was to reduce non-productive time, particularly at the thread-in stage, by developing and testing a model for on-line measurement of the bending forces, taking account of the hot strip shape measured in the hot wide strip mill. A joint effort was made with the Fraunhofer-Institut, Karlsruhe, to develop a measurement system to provide information on-line on the longitudinal profile of the tip of the rolled strip. Rolling tests have so far shown the model to be suitable in principle for on-line provision of target values for the reverse bending appliances if a hot strip profile is available. Manual corrections will continue to be required until a measurement system is capable of determining the strip shape and the longitudinal profile for adaptions. Commercial use of the bending model will only be possible when test results covering the entire production spectrum are available. To obtain these it will first be necessary to overcome problems encountered during the rolling tests, such as model calculation time, hot strip profile measurement and the connection of the model.

Additional information

Authors: SINGEWALD H, Preussag Stahl (DE)
Bibliographic Reference: EUR 15131 DE (1994) 98 pp., FS, ECU 11.50
Availability: (2)
ISBN: ISBN 92-826-9343-0
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