Shift Roll Shape Determination for Rolling Mill Crown Control
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Solution Overview
Problem
Existing methods for determining the shape of shift rolls in rolling mills rely on trial-and-error procedures and mathematical functions, making it difficult to optimize the roll shape based on the numerical distribution of plate widths, leading to inefficiencies in plate crown control and increased rolling vibrations.
Innovation Solution
A method involving determining necessary control amounts, maximum radius differences, and smoothing roll gap changes to create a shift roll shape that accounts for plate width distributions, using a series of steps to refine the roll radius distribution and minimize radius differences, thereby optimizing the roll shape without relying on trial-and-error.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a mathematical function is used to express the shift roll shape, then the roll shape can be defined systematically, but it becomes difficult to optimize based on numerical distribution of plate widths
Solution Approach 1:
The patent replaces the traditional mathematical function-based roll shape definition with a numerical data-based approach. By using measured plate crown data and plate width distribution data to directly determine roll shape parameters, the system eliminates the constraints of mathematical functions and enables optimization based on actual operational data distributions.
2Manufacturing precision
If trial-and-error procedure is used to determine roll shape, then optimization can be attempted, but the process becomes troublesome and time-consuming
Solution Approach 1:
The patent performs preliminary measurements of plate crown and plate width distribution before roll shape determination. By collecting and analyzing this data in advance, the system establishes a data-driven foundation that eliminates the need for subsequent trial-and-error adjustments, directly determining the optimal roll shape from the beginning.
Solution Approach 2:
The patent uses actual plate crown measurement data and plate width distribution data as feedback to determine the roll shape. This feedback mechanism replaces trial-and-error by using real operational results to directly inform the roll shape configuration, ensuring optimal performance from the start.
3Manufacturing precision
If roll shape is optimized for specific plate widths, then plate crown control improves, but rolling vibrations may increase
Solution Approach 1:
The patent determines roll shape parameters based on actual plate crown measurements and plate width distributions. By using real operational data to define roll geometry parameters, the system optimizes plate crown control while the data-driven approach inherently accounts for vibration characteristics observed during actual rolling operations.
Data Source
AI summary
A method for determining a shape of a shift roll for a rolling mill, includes the steps of determining a necessary control amount distribution αi for a plate crown with respect to plate widths, based on a distribution of the number of plates rolled by a target rolling mill with respect to plate widths, and providing a maximum radius difference yA0 of the shift roll. The method further includes the steps of preliminarily determining a line yi of a roll radius distribution with respect to plate widths, based on the necessary control amount distribution αi and the maximum radius difference yA0, shifting the line yi of the roll radius distribution by a maximum roll shift to obtain a distribution ΔyBi of a roll gap change amount with respect to plate widths under the maximum roll shift, and smoothing sharp local changing part of the distribution ΔyBi of the roll gap change amount.