Control method for headed plate shape rolling parameters of leveling machine and leveling machine

Abstract

The invention discloses a control method for headed plate shape rolling parameters of a leveling machine and the leveling machine. The leveling machine comprises a working roll. The control method comprises the following steps: sampling strip steel at the flat inlet of the leveling machine, and fitting the shape parameters of the cross section of obtained sampled strip steel to obtain secondary convexity of the strip steel; obtaining the total leveling rolling force; fitting obtained first roll bending force and roll gap convexity by polynomials in a process of rolling the strip steel through the total leveling rolling force, obtaining a corresponding relationship between the first roll bending force and the roll gap convexity based on fitting, confirming second roll bending force of the working roll of the leveling machine during rolling of the strip steel, controlling the total rolling force of the leveling machine to be the total leveling rolling force during rolling of the strip steel, and controlling the working roll to output the second roll bending force.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a method for controlling the strip shape rolling parameters of a temper mill and the temper mill. Background technique [0002] With the rapid development of steel processing technology, users have more and more stringent requirements on the quality of strip steel. In the prior art, a tempering machine is usually used to level the strip steel. It is almost completely in a soft state and is not suitable for mechanical processing. If the annealed strip is lightly stamped at this time, tensile strain and irregular slip lines will occur on the surface of the strip, which will affect the appearance. Therefore, it is used as a finished strip Steel needs to be temper rolled, that is, mild cold rolling is carried out without substantially changing the thickness of the strip, so that the properties of the cold-rolled strip can be controlled. [0003] However, the existing tempering...

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Problems solved by technology

[0002] With the rapid development of steel processing technology, users have more and more stringent requirements on the quality of strip steel. In the prior art, a tempering machine is usually used to level the strip steel. It is almost completely in a soft state and is not suitable for mechanical processing. If the annealed strip is lightly stamped at this time, tensile strain and irregular slip lines will occur on the surface of the strip, which will affect the appearance. Therefore, it is used as a finished strip Steel needs to be temper rolled, that is, mild cold rolling is carried out without substantially changing the thickness of the strip, so that the properties of the cold-rolled strip can be controlled

[0003] However, the existing tempering machine adopts the constant rolling force mode to control the strip head during production, and switches to the constant elongation mode for control when the speed increases. Under the constant rolling force mode, the tempering machine Completely rely on the set shape rolling parameters for production, the shape rolling parameters include rolling force and work roll bending force set value for production, the setting accuracy of the shape rolling parameters is directly It affects the shape and surface quality of the strip head, and in the prior art, the shape rolling parameters are usually set by the operator's experience, so that the set value of the shape rolling parameters is accurate Low, so that the quality of the exported strip steel shape is reduced, resulting in a decrease in the genuine rate of the strip after flattening

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