Method and control device for controlling the meandering of rolled material
The method and device use an area camera and PID control to detect steel sheet edges and calculate meandering and differential load, addressing disturbances and enhancing control precision in hot-rolled steel sheet meandering.
JP2026091027APending Publication Date: 2026-06-03JFE STEEL CORP
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- JFE STEEL CORP
- Filing Date
- 2024-11-22
- Publication Date
- 2026-06-03
AI Technical Summary
Technical Problem
Existing technologies for controlling the meandering of hot-rolled steel sheets in finishing mills are susceptible to disturbances such as steam and scale, leading to inaccurate edge detection and meandering control.
Method used
A method and device using an area camera to capture images of the steel sheet in the longitudinal direction, detect edge coordinates, calculate meandering amount and differential load, and perform leveling control with a PID control system, integrating luminance differential values to enhance accuracy and resistance to disturbances.
Benefits of technology
Accurate detection of steel sheet edges and meandering control is achieved, reducing tail-end tapering and improving precision despite disturbances like steam and scale.
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Smart Images
Figure 2026091027000001_ABST
Abstract
The present invention provides a method and control device for controlling the meandering of a rolled material, which can accurately detect the edges of the rolled material and perform high-precision meandering control of the rolled material, regardless of disturbances such as steam and scale. [Solution] The method includes the steps of: detecting the edge coordinates of the rolled material from images continuously captured in the longitudinal direction of the rolled material using an area camera; calculating the amount of meandering of the rolled material based on the edge coordinates of the rolled material; calculating the difference load between one side and the other side in the width direction of the rolled material at the rolling stand; calculating a meandering amount leveling control amount based on the amount of meandering and a difference load leveling control amount based on the difference load, and determining a leveling control amount based on these; and performing leveling control of the rolling stand based on the leveling control amount. The step of detecting the edge of the rolled material involves obtaining the luminance differential value in the width direction of the rolled material from the captured image, finding the coordinate where the integrated differential intensity value obtained by integrating the luminance differential value in the longitudinal direction of the rolled material is maximized, and detecting the edge coordinates of the rolled material based on this coordinate.
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