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A proposal improvement in flatness measurement in strip rolling

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Abstract

In strip rolling flatness of the final product is controlled inline with a roll sensor placed at the outgoing of the tandem mill to measure the longitudinal (in the rolling direction) internal stress profile throughout the coil. This profile involves resultant force and sometimes resultant moment (due to preset anomaly for example) equilibrated by the coiler. When strip is relaxed these two quantities are eliminated and there remain residual stresses in the strip. Since negative residual stresses are the main origin of defects, operators subtract the resultant force from measurements to visualize the residual stress profile in real time and detect negative values, without considering the resultant moment. In this paper we show that to predict flatness defects correctly we have to subtract resultant moment too. Otherwise, unpredictable defects manifest in the delivered product.

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Acknowledgments

Author wish to thank Arcelormittal company for providing measurements and Pierre Montmitonnet for helpful and comments on the paper.

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Authors and Affiliations

  1. Military academy of Fondouk Jedid, 8012, Nabeul, Tunisia

    Sami Abdelkhalek

  2. Applied Mechanics and Systems Research Laboratory, Tunisia Polytechnic School, University of Carthage, B.P. 743-2078, La Marsa, Tunisia

    Sami Abdelkhalek

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  1. Sami Abdelkhalek
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Correspondence to Sami Abdelkhalek.

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Abdelkhalek, S. A proposal improvement in flatness measurement in strip rolling. Int J Mater Form 12, 89–96 (2019). https://doi.org/10.1007/s12289-018-1409-4

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  • DOI: https://doi.org/10.1007/s12289-018-1409-4

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