Manufacturing device and manufacturing method for hot-rolled steel strip

Abstract

In order to provide a manufacturing device and a manufacturing method for a hot-rolled steel strip, which are capable of obtaining the desired quality of material by rapid uniform cooling immediately after rolling, and improving yield by early sheet tension and sheet shape measurements, a manufacturing device for a hot-rolled steel strip is provided with a finishing rolling mill line (11), a first cooling unit (13) installed just behind the exit side of the finishing rolling mill line, and a pinch roll (14) which is installed on the exit side of the first cooling unit and in contact with both the upper and lower surfaces of a strip (S), at least a wiping roll (15) located on the upper side of the strip (S) is disposed between the first cooling unit and the pinch roll, and a tension / shape measuring unit (16) for measuring the tension and shape of the strip (S); is installed between the wiping roll and the pinch roll.

Description

technical field [0001] The present invention relates to a manufacturing apparatus and manufacturing method of a hot-rolled steel strip. More specifically, it relates to a manufacturing apparatus and manufacturing of a hot-rolled steel strip capable of obtaining a desired material by quenching immediately after rolling and capable of producing a high yield. method. Background technique [0002] As such hot rolling facilities, there are facilities disclosed in Patent Documents 1 and 2, for example. That is, in Patent Document 1, there is described a hot rolling facility, which can stably transfer a rolled sheet even if a cooling lathe with high hydraulic pressure and high flow rate is used, and can obtain a high yield hot rolling system, etc. For this purpose, the pinch rolls are disposed close to the output side of the cooling device, and the tension detection mechanism detects the tension of the rolled strip based on the current value supplied to the drive motor of the pinc...

AI Technical Summary

Problems solved by technology

In the case that the cooling device is arranged close to the output side of the finishing mill train, and the output side is equipped with a pinch roll close to the output side, the observation of the appearance shape is set on the output side close to the pinch roll, and according to the shape observation results, the rolling The mill corrects the shape, but since the shape observation position is separated from the finish rolling mill line, the section where the defective part is not adjusted and produced becomes longer, so the yield rate deteriorates

On the other hand, when the shape is to be measured as early as possible and the vicinity of the output side of the finish rolling mill train is used as a shape observation position, the cooling device near the finish rolling mill train exit side is separated from the finish rolling mill train, and the material cannot be processed by rapid cooling immediately after rolling.

[0035] In addition, Patent Document 3 discloses a technology of disposing a shape detector near the output side of the friction contact device in the cooling device near the output side of the rolling mill, but it relates to cold rolling, which is different from the hot rolling technical field of the present invention. , and there is no record of the pinch roller, so it is presumed that the tension is applied by the winder, which is different from the structure of the present invention in which the tension is applied by the pinch roller

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