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Thickness control method of hot-rolled strip steel and application

A technology for thickness control and hot-rolled strip, applied in rolling mill control devices, metal rolling, metal rolling, etc. Overshoot, thickness uniformity, reduced oscillation and overshoot effects

Active Publication Date: 2021-10-01
湖南华菱涟源钢铁有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] This application provides a hot-rolled strip thickness control method and its application, aiming to solve the problem that the existing AGC system adjustment method is prone to vibration when the thickness deviation of the strip head is large, causing the looper to be unstable and cause rolling breakage , narrowing and other quality accidents

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  • Thickness control method of hot-rolled strip steel and application
  • Thickness control method of hot-rolled strip steel and application
  • Thickness control method of hot-rolled strip steel and application

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Embodiment Construction

[0029] The implementation manner of the present application will be further described in detail below with reference to the drawings and embodiments. The detailed description and drawings of the following embodiments are used to illustrate the principles of the application, but not to limit the scope of the application, that is, the application is not limited to the described embodiments.

[0030] In the description of this application, it should be noted that, unless otherwise specified, the meaning of "plurality" is more than two; the terms "upper", "lower", "left", "right", "inner", " The orientation or positional relationship indicated by "outside" and so on are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a reference to this app...

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Abstract

The invention relates to a thickness control method of hot-rolled strip steel and an application. The thickness control method of the hot-rolled strip steel comprises the following steps: the maximum pressing rate of each rolling mill in N rolling mills is obtained, and the second flows of the rolling mills are equal; when the maximum thickness adjusting quantity of the Nth rolling mill in the first operation duration is larger than a corresponding thickness deviation adjusting task, the Nth rolling mill is adjusted according to the corresponding scanning period, the integral control coefficient of the Nth rolling mill and the roll gap adjusting quantity obtained according to the current thickness deviation reference calculated value of the corresponding strip steel; the rolling mill before the Nth rolling mill is configured to be in a first state in which the thickness of the steel strip is kept unchanged; and the pressing rates of the N rolling mills are dynamically adjusted, and the load of each rolling mill is balanced. According to the thickness control method of the hot-rolled strip steel, the strip steel thickness is not prone to generating oscillation and overshoot in the adjusting process, the strip steel pattern is good, the thickness is uniform, and therefore, the quality of the strip steel is guaranteed.

Description

technical field [0001] The present application relates to the technical field of steel rolling automatic control, in particular to a thickness control method and application of hot-rolled strip steel. Background technique [0002] At present, the most commonly used control method for the thickness of the hot-rolled strip is to measure the actual thickness of the strip through the thickness gauge at the exit of the rolling mill, and then to perform feedback control on the thickness of the strip by adjusting the hydraulic roll gap of the rolling mill. Usually, this thickness The control method is called monitoring AGC (Automatic Gage Control). The AGC control system is widely used in each rolling mill of the finishing line of the hot continuous rolling coil production line. Through the control of various AGC control systems, the product can reach the required target thickness. Due to the limitation of the structure of the rolling mill and the maintenance of the thickness gaug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/16
CPCB21B37/16B21B37/165
Inventor 余斌钟新建李丹吴成梁张力夫张尊干
Owner 湖南华菱涟源钢铁有限公司
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