Automatic adjusting system adopting double-dynamic dead zone control mode for roll gap levelness of finish rolling mill

Abstract

The invention relates to an automatic adjusting system adopting a double-dynamic dead zone control mode for roll gap levelness of a finish rolling mill. According to the automatic adjusting system, the middle-rear material shape of rough rolling feeding material is adjusted by using a finish rolling front machine frame, so that the adjusting burden of rolling of a rear machine frame is reduced; the shape of the tail part of strip steel is revised by a middle frame, and smooth rolling of a tail machine frame is guaranteed; and a roll gap levelness value of a machine frame of the rolling mill is automatically adjusted by the rolling mill according to the rolling force deviation changes of the machine frame of the rolling mill, deviation of the tail part of the strip steel is controlled, operation faults of the strip steel are reduced, and the stability of the rolling process of the strip steel is improved. The automatic adjusting system has the advantages that dynamic control over the roll gap levelness of the rolling mill in the rolling process of hot rolled strip steep is realized, the rolling stability is effectively improved and the occurrence of a tail-throwing accident is effectively inhibited.

Description

Technical field [0001] The invention belongs to the field of finishing mill control, and in particular relates to a finishing mill roll gap level automatic adjustment system with dual dynamic dead zone control mode. Background technique [0002] The roll gap level of the hot rolling finishing mill has always been manually adjusted according to the horizontal orientation of the strip during rolling to ensure the smooth rolling of the strip. However, this method will not only lead to high labor intensity and high mental stress during operation, but also multiple racks cannot be visited at the same time, and the efficiency is low, resulting in frequent occurrence of stuck steel and tail-flicking accidents. [0003] According to the unstable state change during strip rolling, it will correspond to the change of the rolling force deviation. The more the strip runs laterally, the greater the change in rolling force deviation. The most typical is the tail-flick accident. Through long-te...

AI Technical Summary

Problems solved by technology

Since these disturbances cannot be well eliminated, the true variation trend of the rolling force deviation cannot be accurately judged, let alone controlled.

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