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Plate shape control method with target of reducing maximum deviation

A technology of shape control and maximum deviation, applied in the direction of contour control, etc., can solve the problems of not considering the influence of the change of the maximum value of the shape of the shape, and cannot guarantee the quality requirements of the strip, etc., to achieve fast response and simple effects

Active Publication Date: 2010-10-06
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of treatment will inevitably bring about a problem: even if the plate shape measurement data meets the product requirements (for example, less than 10I), it cannot guarantee that the strip steel can actually meet the product plate crown quality requirements, because it is possible that some of these data The absolute value has exceeded 10I
[0009] The characteristics of the above-mentioned methods are all carried out on the basis of the original flatness average statistical method, without considering the influence of the change of the maximum flatness, so it is unavoidable that the actual flatness control deviation does not meet the product quality requirements Happening

Method used

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  • Plate shape control method with target of reducing maximum deviation
  • Plate shape control method with target of reducing maximum deviation
  • Plate shape control method with target of reducing maximum deviation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Example 1: Strip steel data: steel grade DU3542D1, entrance thickness 3.53mm, exit thickness 1.206mm, width 1781mm, according to the principle of strip correlation coefficient determination Bf=0.45, the maximum shape deviation is +23I, and it appears in the shape measurement The 17th ring of the instrument, according to the principle of determining the correlation coefficient of the maximum plate convexity deviation Df = 0.8, the pressure block pressure calculated according to the traditional control algorithm formula (1) is [162.52, 257.01, 175.39, 89.62, 121.79, 147.81, 259.17] .

[0081] (1) Calculate the position S0 from the middle of the strip to the maximum plate crown deviation according to formula 5

[0082] S 0 = Lr n * ( d - n 2 ) = 1872 36 * ( 17 - 36 2 ) = - 52 mm

[0083] (2) Calculate the briquette length according to formula 6

[0084] Wd = L M = 1925 7 = 275 mm

[008...

Embodiment 2

[0095] Example 2: Strip data: steel grade DT0144E1, entrance thickness 2.26mm, exit thickness 0.504mm, width 916mm, according to the strip correlation coefficient determination principle Bf = 0.25, the maximum shape deviation is +12I, and appear in the shape measurement The tenth ring of the instrument, according to the principle of determining the correlation coefficient of the maximum plate convexity deviation Df = 0.2, the pressure block pressure calculated according to the traditional control algorithm formula (1) is [23.4, 87.54, 106.46, 102.23, 97.52, 85.33, 19.9] .

[0096] (1) Calculate the position S0 from the middle of the strip to the maximum plate crown deviation according to formula 5

[0097] S 0 = Lr n * ( d - n 2 ) = 1872 36 * ( 10 - 36 2 ) = - 416 mm

[0098] (2) Calculate the briquette length according to formula 6

[0099] Wd = L M = 1925 7 = 275 mm

[0100] (3) Calculate...

Embodiment 3

[0112] Example 3: Strip steel data: steel grade AN0543D5, entrance thickness 3.02mm, exit thickness 0.797mm, width 1379mm, according to the strip correlation coefficient determination principle Bf=0.32, the maximum shape deviation is -15I, and it appears in the shape measurement In the 25th ring of the instrument, according to the principle of determining the correlation coefficient of the maximum plate crown deviation Df=0.48, the pressure block pressure calculated according to the traditional control algorithm formula (1) is [98.15, 114.68, 121.22, 153.54, 177.18, 137.78, 75.77] .

[0113] (1) Calculate the position S0 from the middle of the strip to the maximum plate crown deviation according to formula 5

[0114] S 0 = Lr n * ( d - n 2 ) = 1872 36 * ( 25 - 36 2 ) = 364 mm

[0115] (2) Calculate the briquette length according to formula 6

[0116] Wd = L M = 1925 7 = 275 mm

[0117] (3) Ca...

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Abstract

The invention relates to plate shape control of cold-rolling strip steels, in particular to a DSR plate shape control method with asymmetrical control performance. A plate shape control method with a target of reducing maximum deviation comprises the following steps of: based on a press block pressure output value calculated by a plate shape control regulating quantity calculation method for the conventional automatic plate shape control system, calculating a maximum plate shape convexity deviation value and a corresponding strip steel width position, then calculating a DSR press block number corresponding to an area according to the strip steel width, finally calculating the pressure regulating quantity of the press block, and correcting the press-down distribution of other press blocks based on the principle that the total regulating quantity is not changed. The method performs focus regulation and control on the maximum deviation without affecting the working state of the control system, and effectively works through a plate shape execution mechanism (DSR roll) so as to ensure that the practical strip steel plate shape convexity can reach the product quality standard and reduce the deviation brought by a plate shape statistic calculation method.

Description

Technical field [0001] The invention relates to the shape control of cold rolled strip steel, in particular to a DSR (Dynamic Shape Roll, that is, dynamic shape roll) shape control method with asymmetric control performance. Background technique [0002] The strip shape includes the dimensions of the strip in both vertical and horizontal dimensions. As far as the longitudinal direction is concerned, it usually refers to the straightness or warpage, that is, the degree of flatness along the length of the strip; while in the transverse direction of the steel plate, the plate shape refers to the cross-sectional shape of the steel plate, namely The thickness distribution in the width direction of the steel plate includes a series of concepts such as plate convexity, edge thinning and local high points. Among them, the convexity is the most commonly used representative index of transverse flatness. [0003] The convexity value of the usual product shape is directly measured by the sha...

Claims

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Application Information

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IPC IPC(8): B21B37/30B21B37/34
Inventor 赵会平吴文彬羌菊兴潘刚王欣
Owner BAOSHAN IRON & STEEL CO LTD
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