Interlock protection control method and system for vertical rolling mill

Abstract

The invention discloses an interlock protection control method and system for a vertical rolling mill. The system comprises a rough mill and a processor; the rough mill comprises a guide rail, a working roll and a balancing oil cylinder of the working roll; limiting switches are arranged at the limit positions of the working roll and installed on the guide rail through stopping blocks; position sensors are arranged at the two ends of the balancing oil cylinder and used for collecting a working roll balancing position value; the processor is used for judging whether the limiting switches are triggered or not and whether a difference value between an actual roll clearance value and the working roll balancing position value is smaller than a preset value or not, if yes, steel is fed into the rough mill, and if not, a steel plate is swung. The method comprises the following steps that the roll clearance opening limit position of the working roll is set; the difference value between the actual roll clearance value and the working roll balancing position value is set; the vertical rolling milling procedure is conducted; whether the roll clearance is opened to the limit position or not and the difference value between the actual roll clearance value and the working roll balancing position value is smaller than the preset value or not are judged, if yes, the steel is fed into the rough mill, and if not, the steel plate is swung.

Description

technical field [0001] The present invention relates to an automatic control method and system for vertical rolling mills, more specifically, to an interlocking protection control method and system for vertical rolling mills. Background technique [0002] The design purpose of the vertical roller mill is to ensure the rolling plate shape and reduce the amount of edge cutting, and the finishing mill is the output equipment for rolling the final product. Arranging the vertical roller mill at the exit of the finishing mill will have the desired effect role. In actual use, it is found that for the rolled thin plate, the rolling force of the vertical roll is too large to cause the plate to arch, and the rolling force is too small, so the purpose of trimming is not realized. However, if the vertical rolling mill is completely relocated from the exit of the finishing mill to the entrance of the roughing mill, the function of the vertical rolling mill can be fully utilized after th...

AI Technical Summary

Problems solved by technology

After the equipment is put into operation, after the rolling is completed, if there is a problem in the rolling process of the next piece of steel, the problem will cause a relatively large impact on the work roll, resulting in damage to the vertical roll side pressure cylinder and motor. Can damage roughing mill work rolls

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