Meandering correction device and meandering correction method for metal strip

EP4691950A4Pending Publication Date: 2026-07-01JFE STEEL CORP

Patent Information

Authority / Receiving Office: EP · EP
Patent Type: Applications
Current Assignee / Owner: JFE STEEL CORP
Filing Date: 2024-04-08
Publication Date: 2026-07-01

AI Technical Summary

Technical Problem

Conventional methods for suppressing metal strip meandering in annealing or working facilities fail to account for conveyance time between meandering detection units, leading to potential divergence and vibration, especially when the steering roll is not positioned near the control target and the distance is substantial, resulting in increased operations and risk of fracture.

Method used

A meandering correction apparatus and method that includes a first meandering amount detection unit, a steering roll with a tilting device, and a second meandering amount detection unit, utilizing feedback control to compensate for conveyance time and implement Smith compensation and sliding mode control to stabilize meandering correction.

Benefits of technology

Stable meandering control is achieved even under restricted conditions where the steering roll is not near the control target, reducing vibration and fracture risks by considering conveyance time and using advanced control methods.

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Abstract

Provided are a meandering correction apparatus and a meandering correction method that can control meandering of a metal strip with high responsiveness even when the distance between a steering roll and a control target position is substantial, resulting in prolonged transfer dead time. Specifically, the meandering correction apparatus for a metal strip includes a first meandering amount detection unit, a steering roll, a tilting device for the steering roll, a second meandering amount detection unit, a first control unit that corrects the shift amount at the meandering control target position based on the first meandering amount by taking into consideration the conveyance time taken from the position of the steering roll to the meandering control target position, and a second control unit that controls the position of the metal strip in the width direction with the steering roll based on the second meandering amount and the corrected shift amount.

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