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Integrate optimized controlling means for planisher elongation roll-force, tension, and roll-bending force

A technology for optimizing control and elongation, applied in the direction of elongation control, etc., can solve problems such as elongation fluctuation, and achieve the effect of reducing adverse effects

Active Publication Date: 2008-10-01
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, if only constant rolling pressure control is used, the elongation will fluctuate and cannot be constant

Method used

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  • Integrate optimized controlling means for planisher elongation roll-force, tension, and roll-bending force
  • Integrate optimized controlling means for planisher elongation roll-force, tension, and roll-bending force
  • Integrate optimized controlling means for planisher elongation roll-force, tension, and roll-bending force

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] 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 s =90KN, the maximum rolling pressure P that can be provided by the reduction system of the temper mill s =4000KN, the maximum bending force S that can be provided by the bending system of the skin pass mill s =200KN, take the set value of front and rear tension Rsv=61KN, allowable deviation of elongation Δε 0 = 0.2% ÷ 3 = 0.067%.

[0097] 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...

Embodiment 2

[0103] 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 s =90KN, the maximum rolling pressure P that can be provided by the reduction system of the temper mill s =4000KN, the maximum bending force S that can be provided by the bending system of the skin pass mill s =200KN, take the set value of front and rear tension Tsv=21KN, allowable deviation of elongation Δε 0 = 0.2% ÷ 3 = 0.067%.

[0104] Input the above parameters into the rolling pressure model of the process computer, the optimal roll bending force model and other relevant models, and through calculation, the rolling pressure set value Psv=2827KN, ​​the roll bending force set value Ssv=156KN, and the rolling pressure to Elongation transfer coefficient k pε =87833KN, tension to elongation transfer coefficient k σε =4.4KN / mm 2 , the transfer coeffic...

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Abstract

The invention relates to a method for optimizing and controlling the rolling tensioning roller of finisher. Wherein, it is in the extending rate control system; the inner ring of control closed loop is rolling pressure closed loop and tension closed loop; based on the difference of adjustment sequence of tension and rolling pressures, first adjusting tension or first adjusting rolling pressure to control the extending rate, to control extending rate and plate shape; the method that first adjusting tension is that optimizes the tension to control extending rate, when it is over limited range, keeps it constant, and adjusts the rolling force; and the method that first adjusting rolling pressure is that optimizes the rolling pressure to control extending rate, when it is over limited range, keeps it constant and adjusts the tension force. The invention can confirm the accuracy of extending rate and the quality of sheet shape.

Description

(1) Technical field [0001] The invention relates to a comprehensive optimization control method for elongation rate and plate shape of a temper mill. (2) Background technology [0002] Existing temper mills generally have two control modes of elongation and rolling pressure (ie constant elongation control mode and constant rolling pressure control mode). [0003] (1) Constant elongation control mode. When the deviation between the actual value of the elongation and the set value exceeds a certain range (the allowable deviation of the elongation), the adjustment amount of the rolling pressure or tension is determined according to the deviation of the elongation, and the rolling pressure or tension is adjusted until the deviation of the elongation back within the allowed range. The method of adjusting the rolling pressure to reduce the deviation of the elongation is the so-called rolling pressure method to control the elongation, and the method of adjusting the tension to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/56
Inventor 顾廷权白振华陈培林连家创李红梅
Owner BAOSHAN IRON & STEEL CO LTD
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