A reduction schedule optimization method for extremely thin strip rolling in a cold tandem mill

Abstract

The invention discloses a reduction schedule optimization method for rolling ultrathin strip steel by a cold continuous rolling set, and relates to special control equipment or a method for a metal rolling machine or other processed products, in particular to a reduction schedule optimization method for rolling ultrathin strip steel by a cold continuous rolling set; traditional equipment parameters and process parameter data of a cold continuous rolling set control system are used for defining process parameters giving consideration to the plate shape, the plate convexity and the reduction control and related to the reduction schedule optimization to calculate optimized target functions under present reduction schedule; the reduction schedule optimization is realized through the computer program control; and under the precondition of considering the safety coefficient, the reduction schedule comprehensive optimization setting of the ultrathin strip steel rolling is realized through judging if the rolling pressure, the rolling power, the slip factor, the slip index, the plate shape, the plate convexity and the reduction are excessive. After the method is adopted, the plate shape in an outlet of a tail frame representing the strip quality is obviously reduced, the plate convexity pass percent is prominently improved, and the strip quality is obviously improved compared with a traditional method.

Description

Technical field [0001] The invention relates to a control device or method specially suitable for a metal rolling mill or its processed products, and in particular to a reduction schedule optimization for comprehensive control of a cold tandem rolling mill in the rolling process of extremely thin materials. Background technique [0002] CVC (Continuously Variable Crown) technology is a new type of roll technology used to control the shape of rolled products. Because of its superior performance in controlling the shape of the technology, it has been widely used in hot and cold rolled plates and strips. Such as figure 1 As shown, the so-called 3+2 type CVC tandem cold rolling mill is a five-stand tandem cold rolling mill with a 4-high CVC model for stands 1-3, and a five-stand cold rolling mill with a 6-high CVC model for stands 4-5. unit. Compared with the tandem cold rolling mill with four-high CVC models in all five stands, the 3+2 CVC tandem cold rolling mill has more powerful...

AI Technical Summary

Problems solved by technology

If the setting of the reduction rule is seriously unreasonable, it will not reach the goal if it exceeds the range of the ability of the roll system parameters to control the shape and convexity of the plate.

In this way, in the rolling process of the ultra-thin strip in the 3+2 type CVC cold tandem mill, the setting of the reduction schedule must not only consider the rolling load balance, slippage and thermal scratches, but also take into account the shape, Otherwise, the product quality will be unqualified and the rolling will not continue, resulting in the failure of production and bringing large economic losses to the unit.

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