Thickness control method of finish roller strip steel and device

A technology of thickness control and strip steel, which is applied in the direction of rolling force/roll gap control, etc., can solve problems such as connection, increase cost, and inability to overcome model errors, and achieve the effect of improving control accuracy

Active Publication Date: 2010-10-27
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They do not distinguish between "simultaneous point" data and "same point" data, only use a single model to control the thickness accuracy, do not link the two models, there are insurmountable model errors, and technology (3) also needs to add more expensive multifunction tester, increased cost

Method used

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  • Thickness control method of finish roller strip steel and device
  • Thickness control method of finish roller strip steel and device
  • Thickness control method of finish roller strip steel and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 The schematic flow chart of Embodiment 1 of the thickness control method of a kind of finished strip steel shown in the present invention includes:

[0034] S11, acquiring simultaneous point measured data and same point measured data;

[0035] The obtained data include the original simultaneous point measured data and the original same point measured data of the parameters related to the rolling force and roll gap, such as rolling force, roll speed, finish rolling temperature, and finish rolling thickness; The set confidence level screens out effective simultaneous point measured data and same point measured data.

[0036] S12. Substituting the measured data of the simultaneous points into an iterative model to calculate the flow thickness of the simultaneous points;

[0037] S13, substituting the measured data at the same point and the measured data at the same point into the roll gap model to calculate the bounce thickness at the same point and the ...

Embodiment 2

[0044] On the basis of Example 1, as Figure II The flow chart of calculating the simultaneous point flow thickness in the present embodiment shown includes:

[0045]S121, substituting the measured data at the same time point, and preset the forward slip value;

[0046] S122, calculating the flow thickness at the first simultaneous point according to the principle of flow balance;

[0047] S123, calculating the forward slip value according to the first simultaneous point flow thickness update;

[0048] S124, judging whether the predetermined number of iterative calculations has been reached, if yes, output the flow thickness at the same point; if no, return to S122.

[0049] The implementation process of this embodiment will be described in detail below by taking the thickness control process of the "7-stage rack" finish-rolled strip steel as an example (the racks are numbered F1-F7).

[0050] After obtaining the required simultaneous point measured data and the same point ...

Embodiment 3

[0106] Such as Figure 5 Shown is a schematic structural view of Embodiment 3 of a device for controlling the thickness of a finish-rolled steel strip according to the present invention, including:

[0107]The data acquisition device 51 is used to obtain the measured data at the same point and the measured data at the same point;

[0108] The data processing device 52 calculates the zero point correction value of the roll gap model and the learning coefficient of the rolling force model according to the measured data at the same point obtained by the data obtaining device 51 and the measured data at the same point;

[0109] The control device 53 adjusts the roll gap and the rolling force according to the zero correction value and the learning coefficient of the rolling force model.

[0110] The beneficial effect of this implementation is that without adding any equipment, the self-learning process of the thickness control of the finished strip is realized, the roll gap and ro...

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Abstract

The invention discloses a thickness control method of finish roller strip steel, which comprises the following steps: obtaining simultaneous point measured data and same point measured data; putting the simultaneous point measured data into an iterative model to obtain the same time point flow thickness by calculation; putting the simultaneous point measured data and the same point measured data into a roll gap model to respectively obtain the simultaneous point bounce thickness and the same point bounce thickness by calculation; mathematically transforming the difference between the simultaneous point flow thickness and the simultaneous point bounce thickness to be taken as the zero correction value of the roll gap model; and according to the difference between the same point bounce thickness and the zero correction value, obtaining the latter calculated rolling force by calculation and comparing with the same point measured rolling force to obtain the study coefficient of a rolling force model, and adjusting the rolling force of a roll gap value according to the aero correction value of the roll gap model and the study coefficient of the rolling force model. The invention also discloses a device for realizing the method. The method and the device can greatly improve the thickness control precision of finish rolled strip steel.

Description

technical field [0001] The invention relates to the field of production control of finish-rolled strip steel, in particular to a method and device for controlling the thickness of finish-rolled strip steel. Background technique [0002] In the production process of finished strip steel, the control precision level of the thickness of finished strip steel is the main index of quality measurement, which is directly related to the economic benefits of steel manufacturers. With the development of society, the thickness accuracy requirements for finished strip steel are more stringent, and often need to reach the level of ±30-±50um. [0003] In order to realize high-precision finish-rolled strip thickness control, a well-designed thickness control system is required. First of all, it is necessary to clarify the factors that affect the thickness change of the finished strip, so that corresponding countermeasures can be adopted. All factors that affect the rolling pressure, roll ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/58
Inventor 李维刚张健民
Owner BAOSHAN IRON & STEEL CO LTD
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