Strip steel tension dynamic control method based on loop quantity deviation and control system using strip steel tension dynamic control method

A technology of dynamic control and tension control, which is applied in the direction of tension/pressure control, etc., can solve problems such as strip steel frame deviation width, narrowing, looper amount deviation, etc., so as to improve the quality of strip steel rolling products and improve control The effect of precision

Active Publication Date: 2014-07-16
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device and method are used to reduce the deviation of the plate width caused by the influence of the temperature of the steel plate, but it cannot solve the deviation of the actual set amount of the loop due to the fluctuation of the process parameters, which will cause the deviation of the strip in the frame or the width of the strip. narrow question

Method used

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  • Strip steel tension dynamic control method based on loop quantity deviation and control system using strip steel tension dynamic control method
  • Strip steel tension dynamic control method based on loop quantity deviation and control system using strip steel tension dynamic control method
  • Strip steel tension dynamic control method based on loop quantity deviation and control system using strip steel tension dynamic control method

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Embodiment 1

[0095] figure 2 It is a structural schematic diagram of an embodiment of a strip tension control system using a strip tension dynamic control method of the present invention. The strip tension control system is used for strip tension control of a hot rolling mill. In this embodiment, The hot rolling unit has rolling stands F3, F4, F5 and F6 arranged in sequence, and each group of front and rear adjacent front stands form three groups of front and rear adjacent front stands and rear stands of F34, F45 and F56 , between each group of front and rear adjacent front and rear frames, respectively equipped with strip tension control system and strip tension control system of the present invention, figure 2 Only a group of rolling stands and their strip tension control systems are shown in figure 2 The front frame 100 and the rear frame 101 can represent any group in the three groups of adjacent frames of F34, F45 and F56, and each group is equipped with an electric looper 110 for...

Embodiment 2

[0106] In Embodiment 2, in the strip tension dynamic control method based on the deviation of the set amount of the present invention, step S400 uses a table lookup method to determine the reference correction coefficient corresponding to the set amount deviation; step S500 uses a table lookup method to determine the strip thickness corresponding to The thickness correlation coefficient. In this embodiment, the amount deviation is divided into 6 levels, and the reference correction coefficients corresponding to the amount deviation are stored in the standard correction coefficient classification data table shown in Table 1. The strip thickness is divided into 4 grades, and the thickness correlation coefficient corresponding to the strip thickness is stored in the thickness correlation coefficient classification data table shown in Table 2.

[0107] Table 1: Benchmark correction coefficient classification data table

[0108]

[0109] Table 2: Thickness correlation coefficie...

Embodiment 3

[0112] Embodiment 3 is the strip tension dynamic control method based on the set weight deviation of the present invention. It is an application example of the strip tension control system of the hot rolling production line finishing mill group in embodiment 1. The hot rolling group includes F34, F45 and F56 Three groups of front and rear adjacent front frames and rear frames are respectively equipped with electric loopers for controlling strip steel tension and the strip steel tension of the present invention between each group of front and rear adjacent front frames and rear frames. In the control system, the dynamic tension control parameters of the three groups of adjacent racks are stored in the two-dimensional data tables shown in Table 3, Table 4 and Table 5 with comprehensive correction coefficients. Among them, the comprehensive correction coefficient is the product of the reference correction coefficient and the thickness correlation coefficient. The computer at the ...

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Abstract

The invention discloses a strip steel tension dynamic control method based on loop quantity deviation and a control system using the strip steel tension dynamic control method, and relates to a control device or method which is specially applicable to a metal rolling mill or products machined by the metal rolling mill, in particular to dynamic control of hot-rolled strip steel tension through a loop. The control system comprises a main transmission speed control module, a tension adjusting module and a tension set value correction module, a strip steel tension set value is corrected by computing loop quantity deviation between a target loop quantity and an actual loop quantity in real time and according to the loop quantity deviation, the strip steel tension set value is increased if the actual loop quantity is higher than the target loop quantity, the strip steel tension set value is decreased if the actual loop quantity is lower than the target loop quantity, tension moment is computed according to the corrected strip steel tension set value and transmitted to a torque adjuster of an electric loop, the strip steel tension is dynamically controlled, and the problem of internal deviation of strip steel in a frame or narrow reduction of the strip steel due to easy deviation of the actual loop quantity of the loop caused by fluctuation of technological parameters in constant tension control of an existing strip steel tension control system is solved.

Description

technical field [0001] The invention relates to a control device or method specially suitable for a metal rolling mill or its processed products, in particular to a method and a control system for realizing dynamic control of hot-rolled strip tension through loopers. Background technique [0002] In hot continuous rolling production, the strip tension between stands has a great influence on stable strip threading and product quality. In order to adjust the strip tension better, loopers are installed between adjacent stands of most hot continuous rolling mills. According to the different mechanical equipment, the looper has experienced the development process from pneumatic looper to electric looper and hydraulic looper. Pneumatic loopers have been eliminated due to poor adjustment accuracy and small adjustment range; electric loopers have three types of constant torque, constant tension, and constant torque and constant tension hybrid control; The tension can be adjusted q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/50
Inventor 刘苗陈炎敏幸利军
Owner BAOSHAN IRON & STEEL CO LTD
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