Control method for reducing edge faults of hot rolled steel plate in line rolling process

Abstract

The invention relates to a control method for reducing edge faults of a hot rolled steel plate in the line rolling process. The method is characterized by including the first step that the centering degree of a side guide plate is controlled as follows: selecting the position of a first-section roller bed to be measured and finding the center of a roller at the inlet and the center of a roller at the outlet of the side guide plate with the roller bed as the center and with the position equitant to both ends as the center according to the length of a roller body, using a connecting line of the two points as a central line, and guaranteeing that the opening degree of the inlet of the roller bed is larger than that of the outlet of the roller bed; the second step that four stand column positions are selected along the roller bed as measuring points, the side guide plate is divided into two sections by the four stand columns, the part from the first stand column to the second stand column is the first section, and the part from the third stand column to the fourth stand column is the second section; the third step that the distance from positions of the stand columns on the same side to the center of the roller bed is measured, and the distance difference is adjusted to be smaller than three millimeters; the fourth step that in the halt process, abrasion on the connection portion between the first section and the second section is measured, and if the abrasion quantity reaches five millimeters or more, the centering degree of the side guide plate needs to be measured and adjusted again.

Description

technical field [0001] The invention relates to a control method for the production of hot-rolled steel plates, in particular to a control method for reducing defects at the coiling edge of a hot-rolled steel plate rolling line. Background technique [0002] The coil shape defects of the hot rolling production line of the steel plate manufacturing plant mainly include edge damage, tower shape, coil misalignment, stacked plates at the head, edge overflow and so on. Among them, the edge damage defects of the strip account for about 70% of the coil defects. Edge damage defects can be divided into two categories: finish rolling edge damage and coiling edge damage according to the generated area, and coiling edge damage accounts for 80% of the total edge damage defects. As the name implies, the finish rolling edge damage is the edge damage generated in the finishing mill, and the coiling edge damage is the edge damage generated in the coiling area. Coiling side damage in the ac...

AI Technical Summary

Problems solved by technology

[0041] The technical problem to be solved in the present invention is: in the existing control method for edge defects of hot-rolled steel sheet binding and coiling, the centering degree of the side guide plate is relatively poor, and the measurement accuracy is low, which leads to relatively easy occurrence of coiling edge defects

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