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Control method and device for thickness of hot-rolled head portion

A control method and technology of hot-rolled coils, applied in rolling force/roll gap control, metal rolling, tail end control, etc., can solve problems such as unsatisfactory control effect of strip head thickness, improve control accuracy, Improving the effect of technical effects

Active Publication Date: 2017-11-21
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The embodiment of the present application provides a method and device for controlling the thickness of the head of a hot-rolled coil, which solves the technical problem of the unsatisfactory control effect of the thickness of the head of the strip existing in the strip rolling in the prior art, and realizes the improvement of the thickness of the strip. The control accuracy of the steel head thickness and the technical effect of improving the shape quality of the finished strip export strip head at the same time

Method used

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  • Control method and device for thickness of hot-rolled head portion
  • Control method and device for thickness of hot-rolled head portion
  • Control method and device for thickness of hot-rolled head portion

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Embodiment 1

[0055] This embodiment provides a method for controlling the head thickness of hot-rolled coils, which is applied to the finishing rolling control system of a hot-rolled production line, such as figure 1 As shown, the method for controlling the head thickness of the hot-rolled coil includes:

[0056] Step S101: Acquiring the rolling process parameters set in the secondary model of finish rolling, the rolling process parameters including strip exit thickness deviation, roll gap setting value, and rolling mill stiffness.

[0057] In a specific implementation process, the secondary model of finish rolling includes: a calculation model for intermediate billet temperature, a calculation model for rolling force setting, a calculation model for roll gap setting, and a corresponding self-learning model.

[0058] In the specific implementation process, there is a control model for finish rolling (namely: the "secondary model" mentioned in the article), which will give the set values ​​...

Embodiment 2

[0098] Based on the same inventive concept, this embodiment provides a control device 200 for the head thickness of hot-rolled coils, which is applied to the finishing rolling control system of a hot-rolled production line, such as figure 2 As shown, the control device 200 for the head thickness of the hot-rolled coil includes:

[0099] The obtaining unit 201 is used to obtain the rolling process parameters set in the secondary model of finishing rolling, the rolling process parameters including strip exit thickness deviation, roll gap setting value, and rolling mill stiffness;

[0100] A determination unit 202, configured to determine the absolute deviation between the set value of the finishing rolling force and the measured value of the finishing rolling force based on the rolling process parameters;

[0101] A correction unit 203, configured to correct the roll gap setting value when the absolute deviation is greater than a preset deviation, to obtain a corrected roll gap...

Embodiment 3

[0117] Based on the same inventive concept, this embodiment provides a control device 300 for the head thickness of hot-rolled coils, which is applied to the finishing rolling control system of a hot-rolled production line, such as image 3 As shown, the control device for the head thickness of the hot-rolled coil includes a memory 310, a processor 320, and a computer program 311 stored on the memory 310 and operable on the processor 320. When the processor 320 executes the computer program 311 Implement the following steps:

[0118] Obtain the rolling process parameters set in the finishing rolling secondary model, the rolling process parameters include strip exit thickness deviation, roll gap setting value, rolling mill stiffness; based on the rolling process parameters, determine the finishing rolling process parameters The absolute deviation between the force set value and the measured value of the finishing rolling force; when the absolute deviation is greater than a pres...

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Abstract

The invention discloses a control method for the thickness of a hot-rolled head portion. The control method is applied to a finish rolling control system of a hot rolling production line, and comprises the following steps: obtaining rolling process parameters in a finish rolling two-level model, wherein the rolling process parameters comprises a deviation of a band steel outlet thickness, a roller clearance set value and the rigidity of a rolling mill; based on the rolling process parameters, determining an absolute deviation of a set value of finish rolling force and an actually measured value of the finish rolling force; when the absolute deviation is greater than a preset deviation, correcting the roller clearance set value, and obtaining a corrected roller clearance set value; and sending the corrected roller clearance set value to a pressing hydraulic system at the tail rack of the rolling mill to adjust a dynamic position of the pressing hydraulic system. The control method achieves the technical effects of improving the control precision of the thickness of the head portion of band steel and improving the plate shape quality of the head portion of the band steel at a finish rolling outlet. Meanwhile, the invention further discloses a control device for the thickness of the hot-rolled head portion.

Description

technical field [0001] The invention belongs to the field of model control of hot rolling and finishing rolling, and in particular relates to a method and device for controlling the head thickness of hot rolling coils. Background technique [0002] Thickness is one of the most important dimensional quality indicators of strip steel. Therefore, improving the thickness accuracy of strip steel has always been the main goal of improving product quality, mainly including the thickness control of the head and the body. Among them, the research on strip head thickness control has always been a hot and difficult point in the field of rolling. If the thickness of the head exceeds the target tolerance range, on the one hand, it will directly affect the thickness control accuracy of the entire coil of steel, and on the other hand, it will also lead to problems such as poor shape of the head at the exit of the finish rolling, and poor rolling stability. [0003] The research shows that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/72B21B37/62
CPCB21B37/62B21B37/72B21B2271/02
Inventor 张喜榜王凤琴刘子英范建鑫王伦谈霖王策李旭东郭薇马闻宇
Owner SHOUGANG CORPORATION
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