Control method of hot-rolling rolled side guide plate for improving hot-rolling roll shape quality

Abstract

The invention relates to a control method of a hot-rolling side guide plate in the metallurgy field, and relates to a control method of a hot-rolling rolled side guide plate for improving hot-rolling roll shape quality. The side guide plate is in a position ring control mode before the band steel enters into the rolling side guide plate; the control mode of side guide plate is switched to a pressure control mode from the position control mode after the band steel enters into the side guide plate; during the pressure control process, when the detected position change of the side guide plate exceeds [Delta]X mm, the control mode of side guide plate is switched to the position control mode from the pressure control mode; and if the position change does not exceed [Delta]X mm, the side guide plate is at the pressure control mode all the time; after the control mode of side guide plate is switched to the position control mode from the pressure control mode, a pressure feedback value of the side guide plate is detected; if the pressure feedback value exceeds K times of a pressure setting value in the pressure control mode, the position of the side guide plate is opened 2 mm with 5 s as a period, until the pressure feedback value of the side guide plate is lower than K times of a pressure setting value in the pressure control mode; and when the band steel leaves the side guide plate; the side guide plate enters into the position control mode. The method effectively solves the problems of quality defects such as layer offset, edge protrusions and edge cracks of roll shapes when rolling supplied material of the band steel swims or has cambers.

Description

technical field [0001] The invention relates to a method for controlling a hot-rolled side guide plate in the field of metallurgy, in particular to a method for controlling a hot-rolled coil side guide plate for improving the quality of a hot-rolled coil. Background technique [0002] The quality of hot-rolled coils has always been an important indicator of the quality of hot-rolled strip products. Whether the coiling and incoming materials are normal or not is the most important factor affecting the coil quality of the hot-rolled finished strip. The main reason is that when the coiled material has swimming and sickle bends, it will lead to quality defects in the final roll shape such as staggered layers, edge out, and edge out. [0003] At present, in the coiling process, there are usually only two control methods for the side guide plate. One is the position loop control, that is, the side guide is always in the position loop control mode, the opening of the side guide i...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to propose a hot-rolled coil side guide plate control method to improve the hot-rolled coil shape quality, which can effectively solve the problems existing in the coiled incoming strip. , When the camber is curved, the coiling shape is prone to problems of layering, edge out, and edge quality defects

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