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Method for controlling edge flatness defects of cold-rolling strip steel

A technology of cold-rolled strip steel and strip steel, which is applied in the field of controlling shape defects at the edge of cold-rolled strip steel, can solve the problems that the edge of the strip steel is prone to shape defects and cannot be eliminated by the shape control system, and achieves Avoid the effect of overshooting

Active Publication Date: 2019-02-26
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

[0004] During the production process of a certain cold rolling mill, the edge of the strip is prone to shape defects, and the shape control system cannot eliminate them. Due to the requirements of the subsequent process, the strip is accepted to have slight waves, but the shape of the edge of the strip is not affected. stricter quality requirements

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  • Method for controlling edge flatness defects of cold-rolling strip steel
  • Method for controlling edge flatness defects of cold-rolling strip steel
  • Method for controlling edge flatness defects of cold-rolling strip steel

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Embodiment Construction

[0047] The present invention will be further illustrated below in conjunction with specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0048] A method for controlling the shape defects at the edge of cold-rolled steel strip, the method comprises the steps of:

[0049] (1) Calculation of plate shape deviation

[0050] Receive the target shape value distribution signal and the shape value distribution signal measured by the shape meter, calculate the discrete shape deviation value according to the measured shape value distribution method, and the discrete shape deviation value can represent the horizontal difference of the strip steel The shape state at the location. The formula for calculating the shape deviation of each section of the strip is as follows:

[0051] Δε(i)=ε(i) eas -ε(i) ref (i=1, 2, 3...m)

[0052] In th...

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Abstract

The invention provides a method for controlling edge flatness defects of cold-rolling strip steel. The method includes the following steps that 1, the flatness deviation is calculated; 2, a flatness deviation compensation scheme is as followings: the flatness deviation value of each section is compensated directly, and meanwhile, different compensation coefficients are applied to the flatness deviations of the first section, the second section and other sections of the edge of the strip steel; 3, the flatness deviation compensation condition is as followings: only when the two sides of the edge of the strip steel have flatness defects at the same time, can they be compensated; 4, the compensation coefficients for the flatness deviations of the strip steel of different specifications are calculated; 5, calculation is performed after compensation, wherein least square fitting is performed on the flatness deviation after compensation, then mode decomposition is conducted through the legendre polynomial expansion to obtain the quadratic flatness deviation coefficient and the quadratic flatness deviation coefficient, and finally a flatness control system adjusts the flatness deviation according to the obtained flatness deviation coefficient. Effective and fast control over strip steel edge flatness defects is achieved by changing the strip steel edge flatness defect adjustment rateof the flatness control system.

Description

Technical field: [0001] The invention relates to a method for controlling edge shape defects of cold-rolled strip steel, and belongs to the technical field of cold-rolled strip steel shape control. Background technique: [0002] Cold-rolled strip steel is the main product of the iron and steel industry. Its production technology level and quality accuracy mark the technological development level of a country's iron and steel industry. The shape quality is an important indicator to measure the quality of cold-rolled strip. [0003] The flatness detection system is an important part of the flatness control system, and it is the prerequisite for realizing the flatness closed-loop control strategy. The accuracy of the flatness detection data plays a big decisive factor in the effect of the flatness control. According to the contact mode between the shape meter and the strip steel, the cold-rolled shape detector is mainly divided into a contact shape detector and a non-contact sh...

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Application Information

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IPC IPC(8): B21B37/28
CPCB21B37/28B21B2263/06
Inventor 何小丽顾廷权樊志强严加根高辉刘云峰
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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