Control method and control system for controlling shape of cold-rolled strip steel

Abstract

The invention discloses a compensation method for controlling the shape of cold-rolled strip steel. The method comprises the following steps of: determining a compensation coefficient of the cold-rolled strip steel according to an actual bandwidth, a rolling maximum bandwidth and position coordinates xi determined by a shape measuring instrument; determining a coiling tension compensation coefficient at each position coordinate xi according to the compensation coefficient, a set total coiling tension and a maximum designed total coiling tension, compensating the set total coiling tension of the cold-rolled strip steel, and obtaining a coiling tension compensation value corresponding to each position coordinate xi; determining a coiling weight compensation coefficient according to the compensation coefficient at each position coordinate xi and the diameter of the steel coil, and compensating the coiling weight on a mandrel of a coiling machine, and obtaining a coiling weight compensation value corresponding to each position coordinate xi; and generating a shape measurement curve of the cold-rolled strip steel according to the coiling tension compensation value corresponding to each position coordinate xi and the coiling weight compensation value corresponding to each position coordinate xi. The compensation method can reduce the measurement deviation of the shape curve.

Description

technical field [0001] The present application relates to the technical field of cold-rolled strip shape control, and in particular to a control method and control system for cold-rolled strip shape control. Background technique [0002] The cold-rolling production line of the strip is usually equipped with a flatness detector to detect the flatness of the cold-rolled strip, and feed back the detection results to the cold tandem mill. At present, a commonly used flatness detector relies on the flatness roll (measuring roll) to detect the tensile stress distribution of the cold-rolled strip to obtain the flatness measurement curve, and the control system of the cold tandem mill is equipped with a flatness target curve, which controls The system makes corresponding adjustments according to the deviation between the flatness target curve and the flatness measurement curve. [0003] The current trend of automotive steel is to use wider cold-rolled steel strips, but actual produ...

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Problems solved by technology

[0004] The present invention provides a control method and control system for cold-rolled strip shape control to solve or partially solve the large measurement error in the shape measurement curve detected by the shape measuring instrument during the production process of wide-width cold-rolled steel sheets , leading to more misjudgments of the shape quality, and a technical problem that affects the production efficiency of wide-width cold-rolled steel sheets

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