Control method of anti-tear roller

Abstract

The invention discloses a control method of an anti-tearing roller. The method comprises the following steps: in an uncoiling process, detecting and uploading the coiling diameter of a steel coil in real time, controlling the pressing position of the anti-tearing roller through a pressing cylinder in real time, and determining a control target of the pressing cylinder according to a geometrical relationship among a tension roller, the anti-tearing roller and a steel belt on an uncoiler so that the anti-tear roller floats along with the coiling diameter of the steel coil, and the wrap angle of the steel belt and the anti-tear roller is kept stable and unchanged. According to the method, it can be guaranteed that the wrap angle of the steel belt and the anti-tear roller is stable and unchanged in the uncoiling process, the problem that the surface of the steel belt is locally torn in the uncoiling process is solved, and the problem that inlet tension is unstable due to large fluctuation caused by sudden tension release in the uncoiling process is solved.

Description

technical field [0001] The invention belongs to the field of cold rolling, and in particular relates to a control method for an anti-tear roll. Background technique [0002] In the production of cold rolling and tempering, the steel coil is prone to bonding between layers after annealing. During the uncoiling process, due to the action of tension, the bonding point is suddenly pulled apart, and the surface of the steel strip is partially torn, which will cause Surface quality problems; in addition, the sudden opening of the bonding and the sudden release of the tension will cause large fluctuations, which will also cause unstable inlet tension and affect product quality. In order to effectively avoid the above problems, an anti-tear roller is installed between the uncoiler and the tension roller. The anti-tear roller presses the steel strip throughout the uncoil process, which can effectively reduce tear defects and stabilize the uncoil tension. However, the position of the...

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Problems solved by technology

[0003] The object of the present invention is to provide a control method for the anti-tear roll, which can ensure that the wrapping angle between the steel strip and the anti-tear roll is stable during the uncoiling process, and avoids the problem of local tearing on the surface of the steel strip during the uncoiling process , to avoid the problem of unstable inlet tension caused by large fluctuations in the sudden release of tension during the uncoiling process

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