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A method for detecting the influence degree of pickling process on transverse section
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A technology of influence degree and section, which is applied in the field of detection of influence degree of pickling process on transverse section, can solve problems such as inconsistency of pickling degree, achieve the effect of improving effectiveness and real-time performance, and reducing thickening
Active Publication Date: 2020-06-23
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
The above-mentioned patents are mainly for the automatic adjustment method of the running speed of the cold-rolled pickling section, which cannot solve the problem of inconsistent pickling degree within the full width of the pickling section itself
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Embodiment 1
[0066] In a 5-stand cold tandem mill, the hot-rolled incoming material crown detector is installed after the pickling section, and the constants a, b, c, d, and e are respectively -0.4%, -0.6%, -0.8%, -0.8%, -1.0%, the thickness of the hot-rolled incoming material (central point) is 2010 μm. After pickling, the thickness of the central point is reduced by 10 μm to 2000 μm, and the specific cross-section detection data are as follows:
[0067]
[0068] During section thickness measurement, compare the thickness at the 200mm position with the thickness at the center point, that is, subtract the thickness at the center point from the thickness at 200mm, and divide the difference between the two by the thickness at the center point to obtain the value A.
[0071] If A≥-0.4%, the system considers the cross-section to be normal, and continues the corresponding comparison logic. ...
Embodiment 2
[0076] In a 5-stand cold tandem mill, the hot-rolled incoming material crown detector is installed after the pickling section, and the constants a, b, c, d, and e are respectively -0.4%, -0.6%, -0.8%, -0.8%, -1.0%, the thickness of the hot-rolled incoming material (central point) is 2010 μm. After pickling, the thickness of the central point is reduced by 10 μm to 2000 μm, and the specific cross-section detection data are as follows:
[0077]
[0078] During section thickness measurement, compare the thickness at the 200mm position with the thickness at the center point, that is, subtract the thickness at the center point from the thickness at 200mm, and divide the difference between the two by the thickness at the center point to obtain the value A.
[0081] If A≥-0.4%, the system considers the cross-section to be normal, and continues the corresponding comparison logic.
...
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Abstract
The invention provides a method for detecting the influential degree of a pickling process on the cross section, and relates to the technical field of pickling rolling of metallurgy machinery. Measurement data of an original convexity gauge is analyzed automatically, an operator is prompted to make related adjustment the moment that the section is discovered to be abnormal after pickling, and theproblems including thickening of the back side after cold rolling and unsatisfied difference control effect in the same sheet caused by abnormity of the section can be reduced. Section abnormity afterpickling is determined and alarmed against automatically, the operator is prompted to make intervention, the hot / cold rolling section state is analyzed automatically, and compared with a present manual calculating, analyzing and determining method, the effectiveness and instantaneity are improved substantially.
Description
technical field [0001] The invention relates to the technical field of metallurgical machinery pickling and rolling, in particular to a method for detecting the degree of influence of a pickling process on a transverse section. Background technique [0002] The edge drop of cold-rolled steel sheet (Edge Drop, referred to as edge drop, also known as edge thinning) is an important parameter of cold-rolled sheet size. The traditional definition of edge drop is the difference between the thickness tA at the position 100mm from the edge minus the thickness tB at the position 15mm from the edge, such as figure 1 As shown, Edge drop=tA-tB. [0003] However, with the continuous improvement of users' requirements for product quality, the traditional definition of edge drop has been difficult to meet the requirements. It often happens that when the control level of the traditional edge drop fully meets the control requirements of the unit, it still cannot meet the user's requirements...
Claims
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