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Method for controlling side waves of hot rolling strip steel

A technology of hot-rolled strip steel and control method, which is applied in the fields of flatness control of hot-rolled strip steel products and side wave control of hot-rolled strip steel, can solve problems that have not been applied, and achieve improvement of side wave defects, The effect of improving the quality of flatness

Active Publication Date: 2014-04-30
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not used in hot rolling production

Method used

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  • Method for controlling side waves of hot rolling strip steel
  • Method for controlling side waves of hot rolling strip steel
  • Method for controlling side waves of hot rolling strip steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] The grinding curve of the original work roll is a sinusoidal curve with a crown of -0.1mm and a roll body length of 1780mm. According to the off-line detection results, determine that the side wave position is within the range of 200mm to 400mm from the center of the strip steel, that is, x 1 200mm, x 2 It is 400mm, and the side wave of hot-rolled strip steel is 1.6% (wave height / wavelength). Determining the maximum roll shape correction c needed to control side waves using an offline simulation tool x is 8 μm. According to the formulas (1)~(6), we can get:

[0071] The initial grinding curve of the work roll is:

[0072] y = - 0.1 × sin [ π 2 ( 1780 - x 1780 ) ] , 0 ≤ x ≤ ...

Embodiment 2

[0080] The grinding curve of the original work roll is a sinusoidal curve, the crown of the work roll is 0.1mm, and the length of the roll body is 2000mm. According to the off-line detection results, determine that the position of the side wave is within the range of 100mm to 500mm from the center of the strip steel, that is, x 1 100mm, x 2 It is 500mm, and the side wave of hot-rolled strip steel is 2.2% (wave height / wavelength). Determining the maximum roll shape correction c needed to control side waves using an offline simulation tool x is 12 μm.

[0081] According to the formulas (1)~(6), we can get:

[0082] The initial grinding curve of the work roll is:

[0083] y = 0.1 × sin [ π 2 ( 2000 - x 2000 ) ] , 0 ...

Embodiment 3

[0091] The grinding curve of the original work roll is a sinusoidal curve with a crown of -0.15m and a roll body length of 1500mm. According to the off-line detection results, determine that the side wave position is within the range of 200mm to 600mm from the center of the strip steel, that is, x 1 200mm, x 2 is 600mm, and the side wave is 2.8% (wave height / wavelength). Determining the roll shape correction c needed to control side waves using an offline simulation tool x is 15 μm.

[0092] According to the formulas (1)~(6), we can get:

[0093] The initial grinding curve of the work roll is:

[0094] y = - 0.15 × sin [ π 2 ( 1500 - x 1500 ) ] , 0 ≤ x ≤ 200,400 ...

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Abstract

The invention relates to a method for controlling side waves of hot rolling strip steel, which is realized by means of correcting a grinding roll-shaped curve of a working roll of a hot rolling mill. The method is characterized by comprising following steps: (S), determining the region of the side waves of the hot rolling strip steel; (S2) determining the correction amount of the shape of the working roll; (S3) correcting the grinding roll-shaped curve of the working roll; and (S4) grinding the working roll according to the corrected working roll grinding roll-shaped curve obtained from the step (S3), obtaining the shape of the corrected working roll, and accordingly controlling the side waves of the hot rolling strip steel. The method overcomes the shortcoming of side waves of strip steel products by means of improving the initial shape of the working roll of the hot rolling mill, and increases the quality of straightness of the strip steel products.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled strip steel production, and in particular relates to a side wave control method of hot-rolled strip steel, which is suitable for flatness control of hot-rolled strip steel products. Background technique [0002] Flatness is an important quality index for hot rolled strip products. The so-called flatness (also known as flatness) is a measure of the degree to which the steel plate conforms to the horizontal plane. It is usually measured by the roughness index, which refers to the maximum deviation distance between the surface of the steel plate and the horizontal plane. Appearance refers to the wave or scoop of the strip. Common flatness defects in hot rolling production include middle wave, double-sided wave, single-side wave, side wave (also known as rib wave or 1 / 4 wave) and camber. [0003] In order to effectively control the flatness of hot-rolled strip steel, since the 1970s, people have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/30
Inventor 张国民焦四海王全胜陈龙夫
Owner BAOSHAN IRON & STEEL CO LTD
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