Method for rolling liquid core under heavy reduction rate by virtue of online thickness regulating roll by utilizing continuous casting machine

Abstract

The invention relates to a method for rolling a liquid core under heavy reduction rate by virtue of an online thickness regulating roll by utilizing a continuous casting machine. The method comprises the following steps of: when two rolling mills are loaded, setting a target thickness, feeding back the thickness value in real time and detecting oil pressure, carrying out conversion on a rolling force to judge whether the rolling force is higher than a limit value, if the rolling force is lower than the limit value, stabilizing rolling until the rolling is finished; if the rolling force is higher than the limit value, regulating and judging the rolling force again; if the target thickness is changed in the rolling process, calculating thickness variation by virtue of a rolling process computer, regulating roll gap of the two rolling mills to be the target thickness, and judging whether the rolling force is higher than the limit value again. In the method provided by the invention, a rolling signal can be changed to change the target thickness in the rolling process, and a wedge-shaped blank is rolled. By applying the method provided by the invention, the quality of a continuous casting can be better improved, the continuous casting and the wedge-shaped blank can be rolled, and the time of a process is reduced while the yield is improved; meanwhile, structure of equipment is simple, investment is less, control is simple, reliability is high, and energy can be greatly saved, thus the method has a good popularization and application prospect.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and relates to a thickness adjustment process for continuous casting slabs and wedge-shaped slabs rolled by liquid cores, in particular to an on-line thickness adjustment roller type large-pressure liquid core rolling method for continuous casting machines. Background technique [0002] Currently, known slab continuous casting machine thickness adjustment processes include roller-type soft reduction and forging-type soft reduction. Roller type light reduction is to adjust the thickness of the continuous casting slab by using a series of small pinch rollers in the secondary cooling section and the third cooling section of the continuous casting machine; forging type light reduction is to add a forging press at the end of the continuous casting machine The machine adopts the method of multiple small reductions to forge and roll the billet at a higher frequency. In theory, the adoption of soft ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an on-line thickness adjustment roller type large-reduction liquid core rolling method for continuous casting machines, which overcomes the large investment, complex equipment structure, and high control difficulty of the existing slab continuous casting machine thickness adjustment process, and improves the continuous casting process. Insufficiencies such as limited quality and effect of slabs can not only achieve the purpose of improving the quality of continuous casting slabs and online dynamic thickness adjustment, but also can significantly save rolling costs due to the large amount of preheating before the continuous casting slabs are completely solidified, eliminating the need for reheating before rolling. Reduce energy consumption and greatly save energy

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