Method for controlling deviation of intermediate billet of coil box

Abstract

The invention discloses a method for controlling deviation of an intermediate billet of a coil box, and belongs to the technical field of hot-rolled steel. The method includes sequentially feeding the intermediate billet into a bending roll unit via an inlet-side guide plate and an inlet roll unit; bending the intermediate billet to form a strip billet; coiling the strip billet by a forming roll and a first coil carrying roll of a coiling station sequentially to form a strip coil; uncoiling the strip coil by an uncoiling station, and then shifting the strip coil; and flattening the strip coil by a pinch straightening roll, and then feeding the strip coil into a finishing mill group via a front-side guide plate of a flying shear to be rolled. The method has the advantages that problems of coiling failure of an intermediate coil due to deviation of an intermediate billet and uncoiling failure due to a poor coil pattern are effectively solved; and investment is omitted, the method is simple, and is high in applicability and obvious in control effect, a stable batch rolling effect of industrial production is guaranteed, and an effect for obviously improving stable production of the hot continuous rolling coil box is realized.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled steel, and in particular relates to a method for controlling the deviation of an intermediate billet of a hot coil box. Background technique [0002] In order to reduce the head-to-tail temperature drop caused by the long distance between rough and finish rolling, two methods are generally adopted at present, namely, the method of adding a heat preservation cover between R2 and finish rolling. By adding a heat preservation cover, the intermediate billet is heated to ensure The temperature uniformity of the intermediate billet; the other is to arrange a centerless coiling hot coil box between the entrance of the rough rolling and the finishing rolling. method to improve temperature uniformity. Compared with the heat preservation cover technology, the hot coil box technology has the following advantages: the intermediate billet is coiled, and the R2 side rolling and hot coil box side coiling tec...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for controlling the deviation of the middle billet of the hot coil box, which solves the problems of coiling tower shape and uncoiling deviation of the hot coil box in the prior art.

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