US 12,678,846 B2 · Plate crown control device

Abstract

A plate crown control device controls tandem rolling equipment based on delivery-side plate crown setting calculation values of stands calculated by setting calculation, mechanical plate crown setting calculation values of the stands, and setting values of bending forces and shift positions of the stands. A processor calculates first learning current values based on differences between mechanical plate crown observation values and mechanical plate crown actual calculation values. The processor prorates first learning values with first learning current values and smoothing gains and updates the first learning values. The processor calculates, in the setting calculation for the next and subsequent materials, setting values of bending forces and shift positions of the stands using mechanical plate crown setting calculation values after correction obtained by adding the first learning values to the mechanical plate crown setting calculation values.

A plate crown control device that controls tandem rolling equipment, which continuously rolls a material to be rolled with a plurality of stands, based on delivery-side plate crown setting calculation values of the stands calculated by setting calculation, mechanical plate crown setting calculation values of the stands, and setting values of bending forces and shift positions of the stands, comprising:

at least one processor;
and
at least one memory,
wherein the at least one memory stores:
a delivery-side plate crown measurement value measured, for a measurement point set in a longitudinal direction of the material to be rolled, by a plate crown meter installed on a delivery side of a last stand among the stands;
actual values including roll forces, bending forces, and shift positions at a time when the measurement point passes the stands;
and
a learning table that stores first learning values of the stands,
wherein the at least one processor is configured by execution of computer readable instructions stored in the at least one memory to execute:
actual calculation value calculation for calculating mechanical plate crown actual calculation values of the stands based on plate thickness of the material to be rolled on an entry side of the stands, plate thickness of the material to be rolled on a delivery side of the stands, and the actual values;
observation value calculation for calculating, using first learning weight coefficients of the stands, mechanical plate crown observation values of the stands to coincide with the delivery-side plate crown measurement value of the last stand;
first learning value calculation for calculating first learning current values of the stands based on differences between the mechanical plate crown observation values of the stands and the mechanical plate crown actual calculation values of the stands;
first learning for prorating, with the first learning current values and smoothing gains of the stands, the first learning values of the stands stored in the learning table and updating the first learning values;
and
setting calculation value correction for calculating, in the setting calculation for a next and subsequent materials, the setting values of bending forces and shift positions of the stands using a corrected set of mechanical plate crown setting calculation values after correction of the stands obtained by adding the first learning values of the stands read from the learning table to the mechanical plate crown setting calculation values of the stands,
wherein the learning table stores second learning values of the stands, wherein
the actual calculation value calculation includes calculating delivery-side plate crown actual calculation values of the stands based on the measurement values and the actual values,
wherein the at least one processor is further configured to execute:
second learning value calculation for calculating second learning current values of the stands using a difference between the delivery-side plate crown actual calculation value of the last stand and the delivery-side plate crown setting calculation value of the last stand, second learning weight coefficients of the stands, and transfer ratios of the stands;
and
second learning for prorating, with the second learning current values and the smoothing gains of the stands, the second learning values of the stands stored in the learning table and updating the second learning values,
wherein the setting calculation value correction calculates, in the setting calculation for the next and subsequent materials, the setting values of bending forces and shift positions of the stands using a corrected set of mechanical plate crown calculation values after correction of the stands obtained by adding the first learning values of the stands and the second learning values of the stands read from the learning table to the mechanical plate crown setting calculation values of the stands.

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Plate crown control device

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Plate crown control device

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Abstract

Claims6