Extension coefficient and plate shape integrated control method in steel strip flattening process
A technology for leveling elongation and flatness control, which is applied in elongation control, contour control, tension/pressure control, etc., and can solve the problem that the elongation deviation may not be completely eliminated, the rolling pressure adjustment is too large, and the elongation control is affected Accuracy and other issues to achieve the effect of improving elongation and shape control accuracy, improving system stability, and eliminating adverse effects
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Embodiment 1
[0066] Steel grade DC51, thickness h=1.2mm, width b=1000mm, given elongation ε sv = 0.8%, allowable control deviation of elongation ± 0.2%, the maximum tension T that can be provided by the tension system of the temper mill max =90KN, the maximum rolling pressure P that can be provided by the reduction system of the temper mill max = 4000KN, take the set value of front and rear tension Tsv = 61KN, elongation deviation ε 0 = 0.2% ÷ 3 = 0.067%.
[0067] Input the above parameters into the rolling pressure model of the process computer, the optimal roll bending force model and other related models, and obtain the rolling pressure set value Psv=1710KN, the roll bending force set value Ssv=101KN, and the rolling pressure to Elongation transfer coefficient k pε =61502KN, tension to elongation transfer coefficient k σε =12.8KN / mm 2 , the transfer coefficient of bending force to rolling pressure k sp = 0.07. According to formula (8) (taking α=1.0), the rolling pressure adjustme...
Embodiment 2
[0074] Steel grade DC51, thickness h=0.2mm, width b=1000mm, given value of elongation ε sv = 0.8%, allowable control deviation of elongation ± 0.2%, the maximum tension T that can be provided by the tension system of the temper mill max =90KN, the maximum rolling pressure P that can be provided by the reduction system of the temper mill max = 4000KN, take the set value of front and rear tension Tsv = 21KN, elongation deviation ε 0 = 0.2% ÷ 3 = 0.067%.
[0075] Input the above parameters into the rolling pressure model, optimal roll bending force model and other relevant models of the process computer respectively, and obtain the set value of rolling pressure Psv=2827KN and the set value of roll bending force Ssv=196KN through calculation. Elongation transfer coefficient k pε =87833KN, tension to elongation transfer coefficient k σε =4.4KN / mm 2 , the transfer coefficient of bending force to rolling pressure k sp = 0.12. According to formula (8) (taking α=1.0), the rollin...
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