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Title

IMPLEMENTATION OF PROCESS SETUP CALCULATIONS AND AUTOMATION CONTROLS IN FINITE ELEMENT ANALYSIS OF HOT STEEL STRIP ROLLING

Authorship

Ilmola, Joonas; Larkiola, Jari; Pohjonen, Aarne; Seppälä, Oskari; Jokisaari, Juha

Ilmola, Joonas

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Larkiola, Jari

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Pohjonen, Aarne

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Seppälä, Oskari

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Jokisaari, Juha

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DOI

10.5151/9785-9785-32280

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Abstract

Finite element method (FEM) is widely used to model the hot strip rolling process. Flatness defects e.g. front-end bending in multipass hot strip rolling is studied by authors using a finite element (FE) model with interactively operating automated controlling logic (ACL) [1]. However, industrial corresponding grade of accuracy in strip thickness subsequent to the rolling pass is not easily accessible in FE-model without separate calculation of significant rolling parameters and integrated roll gap control. In order to study flatness defects and optimize pass schedules the controlling and physics of the FE-model must correspond to the industrial process. For this need the automated controlling logic is upgraded by setup calculations to predicting roll force and work roll flattening. These predictions are utilized in setup positioning of a work rolls. Reliable setup calculation enables smooth multi stand rolling process without significant additional adjustment of roll gap clearance. State of art rolling technology requires above-mentioned setup controlling for the FE simulations to simulate different pass schedules without time consuming preparations. Operational setup calculations together with automated controlling logic of hot strip rolling enable simulation of new pass schedules and efficient problem solving.

Keywords

Hot strip rolling, roll gap control, rolling automation, Roll flattening