Roll gap learning coefficient correcting method in roll gap regulating process of hot continuous rolling strip steel precision rolling

A technology of learning coefficient and adjustment process, applied in the direction of rolling force/roll gap control, etc., can solve the problems of reverse learning, small learning amount, affecting strip thickness accuracy, etc., to achieve rapid roll gap adjustment and improve rolling. The effect of precision

Active Publication Date: 2017-11-21
ANGANG STEEL CO LTD
9 Cites 1 Cited by

AI-Extracted Technical Summary

Problems solved by technology

After analyzing the calculation model of roll gap setting, it is found that when the thickness deviation of the strip head is out of toler...
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Method used

4) further set a range value by the lcs_n obtained after formula 1 calculation, to prevent excessive adjustment, the range value is 200um~500...
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Abstract

The invention relates to a roll gap learning coefficient correcting method in a roll gap regulating process of hot continuous rolling strip steel precision rolling. The method comprises the following steps: when a roll gap is regulated by adopting a roll gap setting calculating model, performing positive correcting on a roll gap learning coefficient when the situations of a super-thick strip steel head size, a slightly small learning regulating amount or reverse learning appear; performing negative correcting on the roll gap learning coefficient when the situations of a super-thin strip steel head size, a slightly small learning regulating amount or reverse learning appear, wherein the roll gap learning coefficient correcting formula is lcs-n=lcs-o+dh-act*a, in the formula, lcs-n is the roll gap regulating value which is obtained after the calculating of the model by utilizing current strip steel actual data, and is used for calculating the roll gap of a next piece of strip steel; and lcs-o is the roll gap regulating value which is used when the current strip steel setting calculating is performed; and the a is a regulating coefficient. According to the roll gap learning coefficient correcting method in the roll gap regulating process of the hot continuous rolling strip steel precision rolling, the roll gap learning coefficient is corrected in real time according to actual production when specific judgment conditions are satisfied on the basis of an existing roll gap setting calculating model, so that the purposes of regulating the roll gap quickly and precisely and improving the strip steel thickness rolling precision are achieved.

Application Domain

Technology Topic

Head sizeContinuous rolling +2

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  • Roll gap learning coefficient correcting method in roll gap regulating process of hot continuous rolling strip steel precision rolling

Examples

  • Experimental program(1)

Example Embodiment

[0059] [Example]
[0060] The 1700 production line of Anshan Iron and Steel Co., Ltd. Hot Rolling Strip Steel Plant uses the roll gap setting calculation model and the AGC automatic thickness control system to control the thickness of the strip and the thickness of the head and tail. The statistical table of the thickness of the strip head and tail in 2010 is shown in the table. 1.
[0061] Table 1:
[0062] time
[0063] After adopting the method described in this patent in 2012, good results have been achieved. The continuous over-tolerance of the strip head thickness has been significantly improved, especially the positive over-tolerance of the strip head thickness, which is significantly reduced and positive The number of negative over tolerances has also been reduced, and the thickness hit rate has been improved to a certain extent; see Table 2 for specific statistics.
[0064] Table 2:
[0065] time
[0066] Such as figure 1 Shown is a statistical chart of the ratio of positive and negative deviations of strip thickness in 2010 and 2012.
[0067] The above statistics show that the average head thickness hit rate in 2010 was 77.07%, the average head thickness hit rate in 2012 was 77.67%, and the head thickness hit rate increased by 0.6%.
[0068] Conclusion: After the method described in this patent is adopted, the positive and negative ratios of the thickness of the strip head are significantly reduced, and the hit rate of the strip head thickness is improved to a certain extent, which is beneficial to the adjustment accuracy of the AGC system.
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Description & Claims & Application Information

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