Cold-rolled plate shape control method based on optimization algorithm

A control method and technology of cold-rolled sheet, applied in the direction of contour control, etc., can solve the problem that the L1 level CPU shape control program is not suitable for real-time calculation and other problems

Inactive Publication Date: 2012-06-13
WISDRI WUHAN AUTOMATION
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Problems solved by technology

[0012] The traditional cold-rolled flatness control algorithm based on the optimization algorithm needs to solve equations, which is suitable for the

Method used

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  • Cold-rolled plate shape control method based on optimization algorithm
  • Cold-rolled plate shape control method based on optimization algorithm
  • Cold-rolled plate shape control method based on optimization algorithm

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1: the online detection method of plate shape

[0050] The plate shape refers to the degree of warping of the plate, and its essence refers to the distribution of residual stress inside the strip. In cold rolling production, the meaning of the shape of the strip refers to the flatness of the strip, that is, the tensile stress difference of the strip along the width direction. In fact, the meaning of the plate shape also includes the transverse thickness difference of the strip. Generally, the plate shape mentioned only represents the flatness of the plate shape, without considering the transverse thickness difference. Commonly used plate shape representation methods are: "relative length difference representation", "tensile stress difference representation", "strip section shape representation", "waveform representation" and so on.

[0051] The relative length difference representation of straightness: such as image 3 As shown, if a length of untensioned s...

Embodiment 2

[0083] Embodiment 2: Determination method of edge plate shape measurement area and its coverage

[0084] like Figure 5 As shown, if starting from the OS side (operating side) and ending at the DS side (transmission side), each measuring area of ​​the flat measuring roll is numbered from z_1 to z_n, then there will be two Measurement zones z_os and z_ds.

[0085] The purpose of determining the edge measurement area is to determine the effective flatness detection and control area.

[0086] like Image 6 As shown, the length of the uncovered area on the OS side and the DS side is calculated by the following formula:

[0087] l_free_os=(w_zone_sum-w_strip)*0.5-strip_shift+d_axial (Formula 2-1)

[0088] l_free_ds=(w_zone_sum-w_strip)-l_free_os (Formula 2-2)

[0089]In the formula: l_free_ds is the length of the uncovered zone on the DS side, l_free_os is the length of the uncovered zone on the OS side, w_zone_sum is the sum of the width of the measurement zone of the shape r...

Embodiment 3

[0102] Embodiment 3: The setting method of target plate shape

[0103] In cold rolling production, most of the rolled cold plates need to be further processed in subsequent processes, such as hot-dip galvanizing, annealing units and other processes. The plate shape will affect the operation stability of these units, and in the subsequent processes, the plate Therefore, when setting the flatness target curve of the rolling mill, the requirements of the subsequent units must be considered, and the target flatness curve is usually set as a micro-medium wave or a micro-edge wave.

[0104] In this embodiment, the shape setting curve adopts such as Image 6 As shown in the segmented curve, the curve divides the strip width corresponding to the effective flatness detection and control area into two parts, the middle part and the edge part. The expression of the curve is shown in the following formula:

[0105] f s ( ...

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Abstract

The invention relates to a cold-rolled plate shape control method based on an optimization algorithm. The cold-rolled plate shape control method based on the optimization algorithm is characterized by comprising the following steps of: sequencing each plate shape adjusting mechanism in an L1-level base automated central processing unit (CPU) according to the sequence of a supporting roller inclining mechanism, an intermediate roller bending mechanism, a working roller bending mechanism and an intermediate roller transversely moving mechanism; invoking a formula (2) and a formula (3) derived from an evaluation function F for each plate shape adjusting mechanism to calculate the action adjusting value of each plate shape adjusting mechanism; and after calculation is finished, transmitting all the action adjusting values to each plate shape adjusting mechanism by using the CPU to control the plate shape so as to eliminate the plate shape deviation of each plate shape adjusting mechanism. By the cold-rolled plate shape control method based on the optimization algorithm, the key problems in the conventional cold-rolled plate shape control system can be solved, and the method can be directly applied to the plate shape control procedure of the L1-level base automated CPU, so that the advantage in the aspect of improving the calculation precision on the action adjusting quantity of the plate shape control mechanism is exerted completely.

Description

technical field [0001] The invention relates to the field of cold-rolled steel strip production, in particular to a cold-rolled strip shape control method based on an optimization algorithm. Background technique [0002] Shape accuracy is a main quality index of strip steel and an important factor determining its market competitiveness. As industrial users such as automobiles, light industry, home appliances and electrical manufacturing continue to increase their requirements for shape quality, shape control technology has become one of the core and most complex technologies in the field of steel rolling. Another hot issue. [0003] Major domestic cold-rolled strip steel producers all use flatness control technology and control systems on cold-rolled production lines, and these flatness control systems basically rely on imports. At present, only a few well-known multinational companies in the world, such as German SMS SMS and Swedish ABB, can provide a complete set of cold...

Claims

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Application Information

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IPC IPC(8): B21B37/28
Inventor 黄杏往王胜勇卢家斌叶刚桥李传涛李四川李海东
Owner WISDRI WUHAN AUTOMATION
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