Research on the mechanism and law of strip tilt induced by cold rolling intermediate roll shifting

ABSTRACTEnsuring product quality requires the accurate detection of strip flatness during cold rolling. For cold rolling mills with intermediate roll shifting control, the uneven stiffness induced by the shifting process can cause the strip to tilt in the mill, which can affect the accuracy of strip flatness detection. In this study, the strip tilt is defined, and a finite element model of the S6-high mill is constructed using ABAQUS software to study the strip’s deflection and flattening behaviour during the rolling process and the effect of different rolling process parameters on the strip tilt. The specific spatial position of the rolls during the rolling process is also examined, and the main structure of the mill is identified as the primary cause of strip tilt. This research provides a theoretical basis for the strip’s absolute position change in the rolling process, which can enhance the measurement accuracy of flatness detection roll in the future.KEYWORDS: Tilting of stripfinite element analysisroll deflection Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementThe authors confirm that the data and material supporting the findings of this work are available within the article.Additional informationNotes on contributorsTieheng YuanTieheng Yuan, Male, 1997-, Doctoral candidates, University of Science and Technology Beijing. Main research interests are: accurate control of cold rolling profile and flatness, optimal control of cold rolling automation system.Wenquan SunWenquan Sun, Male, 1982-, PhD, Associate Researcher, University of Science and Technology Beijing. Main research interests are: intelligent process modelling and control of big data, multi-process quality control of strip products, process modelling and control theory of large equipment, strip flatness and quality control of cold rolled products.Tingsong YangTingsong Yang, Male, 1996-, Postdoctor, University of Science and Technology Beijing. Main research interests are: electromagnetic assisted flatness control for cold rolling, ontelligent production stability control in continuous withdrawal process.Anrui HeAnrui He, Male, 1972-, Researcher, University of Science and Technology Beijing. Main research interests are: intelligent process control, industrial big data application, virtual simulation and digital twin.