Method for improving coiling temperature control accuracy under laminar cooling model

Abstract

The invention belongs to the technical field of metal rolling temperature control and discloses a method for improving the coiling temperature control accuracy under a laminar cooling model. In a precomputation stage, when a first finish rolling machine frame bites steel, valve mode computation is carried out according to default parameters to obtain a set valve; in a real-time control computation stage, after the head part of the strip steel reaches a finish rolling outlet pyrometer, the number of valves required to be opened in a coarse cooling zone is computed according to the set valve, an actual value is measured, the set value in the precomputation stage is adjusted, and real-time modification of laminar cooling model parameters is carried out; and the real-time modification of the laminar cooling model parameters includes real-time modification of a self-adaption correction coefficient cofa in the precomputation stage and real-time modification of a sensitivity correction coefficient vlern in the real-time control computation stage. According to the method, the parameters can be modified in real time, and the problem of coiling temperature computation deviation caused by temporary technological conditions or parameter variation can be solved in time through human intervention; and different parameter configurations can be selected according to product types, and the model computation accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of metal rolling temperature control, in particular to a method for improving the coiling temperature control accuracy under a layer cooling model. Background technique [0002] In the production process of hot-rolled strip steel, the conventional semi-continuous hot rolling line needs to use a laminar flow cooling device to cool the strip steel after rolling and before coiling. metallographic structure and mechanical properties. [0003] The task of the coil temperature control model is to calculate and update the header water spray for the cooling section to obtain the desired coil temperature. That is, calculate the number of valves that must be opened to achieve the target crimp temperature at a certain flow level. All the valves that need to be opened are allocated between the rough cooling area and the fine cooling area, the valves in the rough cooling area are used for feedforward control, and the v...

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Problems solved by technology

[0006] The embodiment of the present application provides a method for improving the coiling temperature control accuracy under the layer cooling model, which solves the problem that different steel specifications use the same parameter configuration in the prior art, but the same set of parameter configuration cannot meet the needs of the production line. The problem of temperature control accuracy reduction

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