Eventos Anais de eventos
COBEF 2021
11th Brazilian Congress on Manufacturing Engineering
STRIP CROWN AND EDGE DROP SENSITIVITY ANALYSIS OF A 6-HIGH ROLLING MILL
Submission Author:
Renan Wojciechowski , MG
Co-Authors:
Renan Wojciechowski, Yukio Shigaki
Presenter: Renan Wojciechowski
doi://10.26678/ABCM.COBEF2021.COB21-0292
Abstract
Metal strips with tight tolerances and low cost are highly demanded by customers worldwide. Its production relies on a deep understanding of how operational parameters affect the whole process, in order to develop a robust control strategy. The present work aims to assess how strip’s crown and edge drop are affected by intermediate roll shifts, roll bending loads and work roll radius variation for an industrial 6-high cold rolling mill through a sensitivity analysis. The strip exit thickness profile and the contact pressure between work and intermediate rolls are shown, as well. The 3D FEM/Multi-slab method, a hybrid computer model validated with industrial data, is used. This models the rolls of any type with few simplifications and, by running faster than the full finite element model, it is more suitable for a sensitivity analysis. The results show good linear correlation between the strip’s crown (R2≈99%) and edge drop (R2≈94%) with the roll shift and roll bending force, respectively. On the other hand, the roll radius variation’s average R2 was only 72%, though the range of crown and edge drop values was very small (around 4 to 5 μm). The rolls’ contact pressure field shows some peaks that should be considered for premature wear. All 27 cases were simulated in only 2,5 hours.
Keywords
Sensitivity analysis, Strip crown, Edge drop, Finite Element Method
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