Control method of single-rack steckel mill for reducing final pass speed of rolling pieces

Abstract

The invention discloses a control method of a single-rack steckel mill for reducing the final pass speed of rolling pieces. When the pressurized rolling of the rolling pieces is finished with odd passes, the rolling pieces achieve target thicknesses, a roll gap is opened, and the rolling pieces return to the front of the single-rack steckel mill and jump the single-rack steckel mill at technically required speed, i.e. final pass speed less than 1.5 m / s; and when the pressurized rolling of the rolling pieces is finished with even passes, the rolling pieces achieve the target thicknesses, the roll gap is opened, and the rolling pieces pass through the single-rack steckel mill at the technically required speed, i.e. the final pass speed less than 1.5 m / s so as to finish rolling. The invention reduces the final pass speed to the minimum 0.5 m / s by modifying the control process of the single-rack steckel mill, thereby realizing that the single-rack steckel mill reduces the final pass speed, and preventing an oil film bearing of the single-rack steckel mill from being burned; in addition, the invention also discloses a steel-grade rolling process which can also automatically reduce the final pass speed of the rolling pieces passing through the single-rack steckel mill according to requirements and meet the requirements of certain special control and cooling processes.

Description

technical field [0001] The invention belongs to the field of steel rolling, and relates to a rolling process, in particular to a control method for reducing the final pass speed of a rolled piece in a single-stand steckel rolling mill under the condition of ensuring equipment safety. Background technique [0002] Oil film bearings of steckel mills require the minimum rolling speed to be no less than 1.5m / s under load, otherwise the oil film bearings will burn out; and some special steel processes require the final pass speed of the rolled piece to be less than 1.5m / s. [0003] During the rolling process of the steckel mill, the second-level model is used to generate the rolling schedule according to the process requirements, and the first-level control is used to implement the regulations issued by the second-level model, and to achieve the goal of the second-level model by controlling the action of the equipment. Restricted by the secondary model, primary control and equipm...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the last pass speed of the existing steckel rolling mill can only be above 1.5m / s under load, the purpose of the present invention is to provide a single-stand steckel rolling mill to reduce the last pass speed of the rolled piece. The method, by modifying the second-level model and the first-level control program of the rolling mill, the roll gap of the rolling mill is opened during the last pass, and the rolled piece moves forward at a speed of 0.5-1.5m / s, so that the speed of the last pass of the steckel mill is reduced. Prevent the oil film bearings of the steckel rolling mill from burning out, and meet the technological requirements of the final pass speed of the rolled piece required by the special steel grade

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