Method for controlling roll gap of roller in segment soft reduction control technology

Abstract

The invention discloses a control method of roll gap punching in sector segment slight press control technique, which includes the following steps: (1) the target gap values of the rolls at the inlet and the outlet sides of the sector segment are set; (2) the target roll gap values are converted into target hydraulic cylinder position values and transferred to a hydraulic system, wherein, the calculation formula of converting the target roll gap values into target hydraulic cylinder position values is: Xec = {[L-(a+a2)] / L}.Xe.costhelta1+[(a+a2) / L].Xd.costhelta2 Xdc = [(b+b2) / L].Xe.costhelta1+{[L-(b+b2)] / L}.Xd.costhelta2; (3) after receiving the target hydraulic cylinder position values, the hydraulic system controls the stroke of the hydraulic cylinder piston to move the hydraulic cylinder piston to the position indicated by the target hydraulic cylinder position values; (4) the movement of the hydraulic cylinder piston drives the roll to move to achieve the set target roll gap target values, thus achieving the control of the roll gaps. The invention is capable of achieving the precise control of the roll gaps via the hydraulic system.

Description

technical field [0001] The invention relates to a sector section light reduction control technology in a slab continuous casting process, in particular to a roller gap control method in the sector section light reduction control technology. Background technique [0002] In the slab continuous casting process, the segment segment light reduction control technology can be used, that is, the inner quality of the cast slab can be improved by gently squeezing the slab in the solid phase ratio range fs=0.3 to fs=0.7. In the light reduction control technology of the segment, the thickness of the slab and the degree of reduction are usually controlled by controlling the roll gap between the rollers at both ends of the inlet and outlet sides of each segment, and the control is done by the hydraulic system. The usual method is to set the target roll gap value for the entrance and exit side rollers of the fan section, and use the hydraulic cylinder to swing the roll gap to the set tar...

AI Technical Summary

Problems solved by technology

[0003] In the application process of the segment segment light reduction control technology, there is an error in the process of converting the target roll gap value into the target hydraulic cylinder position value, which directly affects the accuracy of the roll gap control

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