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Normal four-roller hot strip steel continuous rolling mill strip steel edge thickening integrated controlling method

A technology of strip edge and comprehensive control, applied in contour control and other directions, can solve problems such as lack of effective control means, and achieve the effect of improving overall quality

Inactive Publication Date: 2008-02-20
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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Problems solved by technology

[0005] In order to overcome the lack of effective control means for the thickening of the edge of the existing common four-high hot-strip continuous rolling mill except for the addition of special equipment, the technical problem to be solved by the present invention is to provide a method that does not increase equipment. A comprehensive control method that can effectively control the thickening phenomenon at the edge of the hot-rolled strip at about 40-60 mm

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  • Normal four-roller hot strip steel continuous rolling mill strip steel edge thickening integrated controlling method

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Embodiment

[0030] The method for comprehensively controlling the thickening of strip edge of common four-high hot strip continuous rolling mill of the present invention comprises the following steps:

[0031] a. The cooling method of the work rolls of the finishing rolling unit adopts a three-stage cooling method with different water volumes in the three-stage cooling sections A, B, and C, and measures the lateral distribution of the temperature of the work rolls after the work rolls are off the machine;

[0032] b. Control the rolling gap time between 25 and 65 seconds;

[0033] c. Measure the wear curve of the work roll after it is off the machine;

[0034] d. According to the lateral temperature distribution of the work rolls measured in step a and the wear curve of the work rolls measured in step c, under the premise of ensuring the flatness of the strip and the convexity of the plate, consider the 40~ For the control of local thickening at the position around 60mm, the off-line mod...

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Abstract

The invention relates to the technical field of plate-shap control in the band steel rolling of a successive mill and discloses a band edge thickening integrative control method which is applicable to a common four rollers hot band steel successive milling machine without milling roller transverse movement, online milling mill roller and band steel edge lubrication. Through optimizing the original roller type curve of the operating machine set of a finishing mill, the transverse distribution of the cooling water of the operating roller and reasonably controlling the milling rhythm, the invention realizes the control of the thickening operation in the region of about 40 to 60mm from edge of the hot milling band steel. The invention solves the problem that the present common four rollers successive mill has no effective control method for the phenomenon of the edge thickening except for additionally adding specialized devices. The invention provides the common rollers and PC mills which have no auxiliary devices such as milling roller transverse movement, online milling mill roller, band steel edge lubrication and so on with a band steel edge thickening integrative control method and need not add devices.

Description

technical field [0001] The invention relates to a continuous rolling mill, in particular to the shape control of a common four-high hot strip continuous rolling mill. Background technique [0002] Continuous rolling mills are widely used in the metallurgical industry. [0003] In the strip shape control technology in hot strip production, the strip shape includes two concepts of flatness and section shape. Flatness refers to the macro wave shape of the strip, such as middle wave, edge wave, rib wave, etc.; cross-sectional shape refers to the thickness distribution of the strip width direction, including plate convexity, wedge shape, edge thinning and local high points, etc. . The shape control of hot-rolled strip steel, such as strip flatness and plate crown, plays an important role in the quality of hot-rolled strip steel. At present, many hot-rolled strip shape control technologies have been successfully developed. There are mainly the following methods: The first is th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/28B21B37/30B21B37/32
Inventor 李俊洪佘广夫杨秀亮吕敬东方淑芳李扬洲李卫平李贵学
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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