Frequency-dependent distribution of control parameters for changing cross-section of rolled piece in rolling train.
A cross-sectional, parametric technology, applied in rolling mill control devices, metal rolling stands, metal rolling mill stands, etc., to solve problems such as inability to set up contours, long transfer times, etc.
Pending Publication Date: 2021-07-27
PRIMETALS TECH GERMANY
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Problems solved by technology
Due to the large distances and the consequently long transfer times, in the prior art in large rolling mill trains with eg seven rolling stands it was not possible to establish the contours quickly and precisely
Method used
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Embodiment Construction
[0053] according to figure 1 In the rolling train 1 an elongated rolling stock 2 is rolled. The rolling stock 2 is generally a flat rolling stock, in particular a strip. In individual cases, however, other types of elongated rolled parts, such as profiles, are also possible. The profile can be, for example, an I-profile, an H-profile, a T-profile or the like. The material of the rolling stock 2 is usually steel, in some cases aluminum. In individual cases, however, it is also possible for the rolled part 2 to be made of another metal, for example copper.
[0054] The rolling stock 2 is usually hot rolled in the rolling train 1 . For example, the rolling mill train 1 can be a finishing mill train for hot rolling metal strip. But cold rolling is not excluded. Regardless of their other configuration, however, the rolling train 1 has a plurality of rolling stands 3a to 3f. figure 1 A total of six rolling stands 3 a to 3 f are shown in . However, the rolling train 1 can als...
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A rolled piece made of metal is rolled in a rolling stand of a rolling train. According to the invention, on the basis of a characteristic variable representing a change in the cross-section of the rolling stock to be discharged from the determined roll stand, for the roll stand and the upstream roll stand, a temporary control variable is first ascertained and used to ascertain a final control variable which influences the cross-section of the rolling stock to be discharged from the roll stand. The roll stand is controlled accordingly. The temporary control variable for the upstream roll stand is determined by frequency filtering of the characteristic variable or the intermediate variable determined therefrom. The frequency filters are designed in such a way that, when the temporary adjustment variables are determined, only the frequency components of the characteristic variable below the limit frequency are included in each case. The limit frequencies are the same or increased from the rolling stand to the rolling stand, respectively. The provisional control variable for the determined roll stand is determined in such a way that, when ascertained, at least a frequency component of the characteristic variable, which is higher than the limit frequency of the roll stand arranged directly upstream, is included.
Description
technical field [0001] The invention proceeds from a method for operating a rolling mill train for rolling rolling stock made of metal, [0002] - wherein the mill train has a plurality of rolling stands through which the rolling stock passes successively in a direction of conveyance which is uniform for the rolling stands, so that the rolling stock is rolled successively in the rolling stand, [0003] -wherein, based on a characteristic variable representing the cross-sectional change of the rolling stock that is to flow out of a certain rolling stand of the rolling mill train, the control device of the rolling mill train is arranged in the rolling mill for the rolling stand and the rolling mill train viewed in the conveying direction For a certain number of rolling mill stands upstream of the stands, first determine the corresponding temporary adjustment parameters, and obtain the corresponding final adjustment parameters under the premise of using the corresponding temporar...
Claims
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IPC IPC(8): B21B13/02B21B37/00
CPCB21B13/02B21B37/00B21B37/28B21B2263/02B21B2263/04B21B2269/04B21B2269/12B21B2271/025B21B2027/103B21B38/02B21B1/18B21B37/36B21B37/58G05B19/182
Inventor K·罗意
Owner PRIMETALS TECH GERMANY