Six-roll mill with upper middle roll capable of being rapidly changed, and roll changing method

Abstract

The invention provides a six-roll mill with an upper middle roll capable of being rapidly changed, and a roll changing method. The six-roll mill comprises a rack, wherein the upper middle roll, an upper working roll, a lower working roll and a lower middle roll are arranged in the rack; a roll changing rail for the lower working roll and a roll changing rail for the lower middle roll are further arranged in the rack; a roll bending device for the upper middle roll is further arranged on the rack; the roll bending device for the upper middle roll comprises roll bending cylinders for the upper middle roll and arranged at an operation side and a transmission side; a wear-resistant lining plate is arranged at the top of a piston rod of each roll bending cylinder for the upper middle roll; a group of rolling wheels is arranged at the two sides of an upper wing of a bearing seat for the upper middle roll separately; two connection rails are arranged between the operation side and the transmission side of the roll bending device for the upper middle roll; and the two connection rails are matched with the two groups of rolling wheels on the bearing seat for the upper middle roll separately. The six-roll mill is provided with a device for changing the upper middle roll independently, the upper middle roll can be changed independently and changed with the working rolls, and flexible rollchanging is achieved, so that the roll changing steps are simplified, and the roll changing efficiency is remarkably increased.

Description

technical field [0001] The invention relates to the technical field of strip steel rolling, in particular to a six-high rolling mill and a roll changing method for quickly changing upper intermediate rolls. Background technique [0002] The single-stand six-high cold rolling mill is suitable for rolling various metal materials such as carbon steel, silicon steel, and stainless steel. It is the mainstream rolling mill model widely used at present. In recent years, cold-rolled strip production has continuously increased the technical indicators such as rolling speed and shape quality, and reducing the time for changing rolls is crucial to improving rolling production efficiency. The six-high rolling mill is generally equipped with a roll changer on the operation side to replace the intermediate rolls and work rolls. Due to the arrangement of anti-winding guide plates, platen tables, emulsion injection beams and other process equipment and various hydraulic pipelines inside the...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a six-high rolling mill and a roll changing method for quickly replacing the upper intermediate roll, aiming at solving the problem that the existing upper intermediate roll can only be changed together with the upper work roll and the lower work roll

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