Rolling load optimization method for hot continuous finishing mill group

Abstract

The invention relates to a rolling load optimization method for a hot continuous finishing mill group. The method comprises the following steps: conducting a limiting value test on incipient rolling reductions of an F1 rack, an F2 rack, an F3 rack and an F4 rack; calculating rolling forces and powers of all racks; comparing the calculated rolling forces of the racks to judge whether the phenomenon of 'reverse rolling force' exists or not and define the rolling mills requiring load adjustment and a corresponding setting-up procedure; calculating power margin evaluation indexes according to the formula W=P / PE, wherein P is the pre-calculated powers of the racks (F1 to F4) and PE is rated powers; reducing 10 percent of press load of the rolling mill F (I+1) with 'reverse rolling force' and adding the reduced load to an optimized rolling mill; calculating the rolling forces f according to the adjusted load rolling reductions, and conducting the reverse test again; distributing and calculating rolling forces, roll intervals and the like of all rolling mills according to ultimate loads; executing adjustments of the rolling forces and the roll intervals with a rolling mill drive system. The rolling load optimization method can automatically conduct load optimization and redistribution according to the reverse condition among the racks. Therefore, the rolling load optimization method has the advantages that the defects that manual auditing of the rolling plans, analog calculation of the rolling forces and adjustment of loads are inaccurate and not in time are overcome, and the quality control level is improved.

Description

technical field [0001] The invention relates to the field of hot rolling production process control. Specifically, the present invention relates to a method for optimizing the rolling load of the finishing unit of a hot tandem rolling mill. The method for automatically optimizing and adjusting the rolling load of the finishing unit of a hot tandem rolling mill is controlled by a process control computer control system (L2), hot rolling process Control, applied to improve rolling stability and reduce the incidence of quality defects. Background technique [0002] The 1580 hot rolling finishing mill of Baosteel Co., Ltd. hot rolling mill is a 7-stand continuous rolling PC (pair cross) mill, which is characterized by strong crown control ability. The finishing rolling process requires that the intermediate billet (roughly rolled slab) be rolled into the target thickness and target width required by the quality design, and the reduction deformation from the thickness of the int...

AI Technical Summary

Problems solved by technology

As a result, the problems of "manual" review of rolling plan, simulated calculation of rolling force and load adjustment are not accurate and untimely, and the control ability and quality control level of the production process are improved.

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