Casting Roll Moving Apparatus of Twin Roll Type Continuous Strip Casting Process

Abstract

A casting roll moving apparatus for a twin roll type continuous strip casting process is disclosed. The casting roll moving apparatus is used with a twin roll type strip casting machine that produces a strip through a method in which, while high-temperature steel melt is supplied between twin rolls which rotate in opposite direction, a large amount of heat is dissipated through the rolls by contact between the steel melt and the rolls, so that the steel melt is rapidly solidified. Opposite ends of the rolls are automatically aligned, so that the recovery rate of the apparatus is increased, and a stable casting process is ensured. Because friction of the apparatus is markedly reduced so that an even rolling force is ensured, a gap between the rolls is maintained constant. Thus, the thickness of a cast strip is maintained constant, and the problem of the occurrence of an uneven surface pattern is solved.

Description

TECHNICAL FIELD[0001]The present invention relates, in general, to casting roll moving apparatuses for twin roll type continuous strip casting machines which have structures such that casting rolls can smoothly move with reduced friction, and in which, if opposite ends of the casting roll become misaligned, they are automatically realigned and, more particularly, to a casting roll moving apparatus for a twin roll type continuous strip casting process which supports casting rolls using hydraulic pressure and reduces friction through the formation of fluid films during a casting process, so that, if opposite ends of the casting rolls become misaligned by the application of uneven rolling force to the casting rolls, or if the gap between the casting rolls becomes uneven due to longitudinal outside force or due to skull entering between the casting rolls, the casting rolls are automatically realigned, that is, are returned to the original positions thereof.BACKGROUND ART[0002]As well kn...

AI Technical Summary

Benefits of technology

[0030]As described above, in the casting roll moving apparatus of the present invention, opposite ends of the casting rolls are automatically aligned, so that the recovery rate of the apparatus is increased, and a stable casting process is ensured. Furthermore, because friction of the apparatus is markedly reduced, by which even rolling force is ensured, the gap between the rolls is maintained constant. Thus, the thickness of a cast strip becomes even, and a problem of an uneven surface pattern is solved.

Problems solved by technology

This is generated in every casting process and causes uneven rolling force.

Hence, the surface of the cast strip may deteriorate.

That is, a defect, in which uneven patterns are formed on the surface, may occur.

Furthermore, FIG. 2 shows the case in which the opposite ends of the rolls are undesirably misaligned or a gap between the rolls is made uneven by longitudinal outside force or by an uneven increase in the distance between the rolls due to skulls that enter between the rolls.

These directly affect the quality of strip edges, thus the casting process becomes unstable, for example, the recovery rate is reduced or a defective winding phenomenon is caused.

These problems occur because the opposite ends of the rolls, which have been misaligned, cannot be rapidly returned to the original states thereof by the friction of a moving apparatus, which is provided under the rolls, and because the conventional art has no means for rapidly returning the rolls to the original states thereof during the casting process.

However, in the S / C process, because steel melt in a liquid phase is treated and roll edges must be reliably sealed, it is inappropriate to use this method.

However, in the case that it is used for a long time, durability thereof is reduced by heat generated by friction.

Furthermore, there is a problem in that it is difficult to realign the opposite ends of the LM guide when the LM guide is misaligned by outside force.

However, because this incorporates a rail and carriage, a problem in which the LM guide twists cannot be solved.

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