Twisting method utilizing online idle rolling mill to twist oval rolled piece

Abstract

The invention relates to a twisting method utilizing an online idle rolling mill to twist an oval rolled piece, which belongs to the field of steel rolling, and is characterized in that at least three rolling mills are utilized in the twisting method, the rolling mill positioned in the middle position is taken as the twisting rolling mill, a twisting hole shape is pre-turned on a roller of the twisting rolling mill, the position of the hole shape of the twisting rolling mill is aligned with the hole shapes of the front and the back rolling mills, and rolling is performed after well adjusting the height and the width of the twisting hole shape, wherein the height of the twisting hole shape is not less than the length of a long shaft of the oval rolled piece, and the width of the twisting hole shape is equal to the length of a short shaft of the oval rolled piece. By utilizing the idle rolling mill on a continuous rolling line, the oval rolled piece which is larger in cross section and difficult to twist and deform is twisted, the twisting and the rolling are realized when rolling a large-specification circular rod product, and the phenomenon of causing frequent damages to a twisting guide and guard device is further avoided.

Description

technical field [0001] The invention belongs to the field of steel rolling, that is, a twisting method in rolling round steel on a continuous rolling production line. Background technique [0002] In the continuous rolling production line where the rolling mill is arranged horizontally, when rolling round steel, the elliptical rolled piece needs to be twisted 90 degrees before entering the next pass, that is, the elliptical rolled piece that comes out horizontally is twisted into a vertical state, And send it into the round hole of the next pass. [0003] Under normal circumstances, a torsion guide device is installed at the exit of the rolling mill where the elliptical rolled piece is rolled out to undertake the 90-degree torsion task. In the twist guide, there is a pair of inclined rollers with oval holes. After the elliptical rolled piece passes through the elliptical pass of the pair of rollers, it is automatically twisted to a certain angle, and it is guaranteed to b...

AI Technical Summary

Problems solved by technology

[0004] However, when rolling large-scale round steel, due to the relatively large section of the rolled piece, the strength of the roller in the torsion guide device is limited, which is not enough to twist the elliptical rolled piece with a larger section to 90 degrees, often causing the roll Wheel fragmentation and frequent damage to guide devices seriously affect normal rolling production

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