JPS5659505A - Rolling method - Google Patents

Abstract

PURPOSE: To obtain the sheet shape in high accuracy, by suitably shifting the work roll adjoining to the intermediate roll to the run-out side or the feed-in side in the five-high rolling mill, and by selecting the driving speed.

CONSTITUTION: The work roll 1 adjoining to the intermediate roll 5 is suitably shifted to the run-out side, for example, and is made in a small diameter. The push roll 6 is arranged for the purpose of adjusting the horizontal distortion of the work roll 1. The backup roll 7, being divided into plural sections, is installed so as to be connected to the transfer device 10 through the holder 9; and is arranged with the push roll 6 and the work roll 1 to be placed on a straight line. During the material 8 is rolled, a horizontal component force in the direction F acts on the work roll 1; then, the work roll 1 is driven at a high speed in order to cause another horizontal component force in the direction P, which lightens the horizontal component force in the direction F. In case of the work roll shifted to the feed-in side, the work roll 1 is driven at a low speed. Moreover, the transfer device 10 is actuated for adjusting the pushing force for the push roll 6 through respective divided section of the backup roll 7; hereby, the displacement of the pushing force is displaced in the vertical direction, and the distortion of the work roll 1 at every position in its longitude is freely adjusted.

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