Method and system for controlling slab turning device

Abstract

A method of controlling a slab turning device used in a rolling line having a rolling mill for rolling a slab heated in a heating furnace. While a preceding slab is being rolled by the rolling mill, the slab turning device holds, lifts, and turns, on the upstream of the rolling mill, a following slab by using holding members (21) of a tongue mechanism system which have holding claws (21a) at fourcorners of a horizontal base (13). The holding claws (21a) at the front ends of the holding members (21) are closed, with a turning section (15), which supports the holding members (21) of the slab turning device, made to be freely turnable. Force of the closing of the holding claws allows the turning section (15) to freely turn to the same angle as the inclination angle of the slab (S), and thiscauses all the holding claws (21a) to be in contact with side surfaces of the slab. After that, the side surfaces of the slab (S) are held by the holding claws (21a) of the tongue mechanism. By this,the slab (S) can be stably lifted before being loaded into the rolling mill. Thus, the slab can be stably lifted during a slab turning process before being loaded into the rolling mill, and the turning process can be automated.

Description

technical field [0001] The present invention relates to a control method and a control system for an apparatus for rotating a slab in a high-temperature state before rolling in a hot rolling facility for a thick plate and the like. Background technique [0002] For example, in the hot rolling process of a thick plate, the slab is rolled in two directions of the width direction and the length direction according to the size of the thick plate product. Specifically, as Figure 6 As shown, after the slab cast in the continuous casting process is heated by the heating furnace 1, it is placed on the conveying table 2 composed of a plurality of rollers, and the oxidation on the surface of the slab S1 is removed by the descaling device 3 After that, the slab S2 is conveyed on the conveying table 2 in a state where the longitudinal direction faces the conveying direction. Then, the slab S3 is rotated 90° by the rotary table 4 just before the rolling mill 5, and the width direction ...

AI Technical Summary

Problems solved by technology

[0015] For example, if the slab S before rotation is inclined, then as Figure 8 As shown, before the four grasping claws 53a in the front, rear, left, and right come into contact with the side surface of the slab S, the main body portion 40 is rolled up as it is, and the grasping may fail.

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