Method for manually adjusting and computing shape target curve of cold-rolled steel strip

Abstract

The invention provides a method for manually adjusting and computing a shape target curve of a cold-rolled steel strip. The method includes 1) receiving original parameters, which are transmitted by a process computer in real time, of a cold-rolled strip coil which is rolled currently; 2) computing the number of effective shape measurement sections and coordinates of shape target curve feature points corresponding to the effective shape measurement sections; 3) inputting manual adjustment coefficients of a bending roller and computing a manual adjustment additional curve of the bending roller; 4) inputting oblique manual adjustment coefficients of a roller and computing an oblique manual adjustment additional curve of the roller; 5) inputting manual adjustment coefficients of edges and the number of the adjusted edges and computing manual adjustment additional curves of the edges; 6) sequentially adding the additional curves obtained from the step 3), the step 4) and the step 5) according to the coordinates xi of the shape target curve feature points to obtain a shape target value manual adjustment additional curve capable of automatically meeting internal stress self-phase-balance conditions; and 7) superimposing the shape target value manual adjustment additional curve onto a basic shape target curve to obtain the shape target curve which is manually adjusted and compensated.

Description

technical field [0001] The invention belongs to the technical field of cold-rolled steel strip shape control, in particular to a method for manually adjusting and calculating a cold-rolled strip steel shape target curve. Background technique [0002] Flatness target curve refers to a group of curves that can be set, selected and used as the final control target of flatness by the operator in the flatness control system. Normally, it may be a horizontal curve, or it may be a parabola or its higher degree curve, which essentially reflects the distribution of the longitudinal participating stress of the rolled strip along the width direction expected by the operator. In the traditional cold-rolled strip shape control concept, it is generally believed that as long as the uneven distribution of residual stress inside the strip is eliminated and the online measured tensile stress distribution becomes a horizontal straight line, the strip shape after rolling will be good. However,...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for manually adjusting and calculating the target curve of cold-rolled strip steel plate, so as to solve the problem of poor control effect of the strip steel plate shape at the exit due to unreasonable setting of the target curve of cold-rolled strip steel plate in the process of strip production. Technical Problems in Belt Broken Accidents

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