Strip breakage prevention cold rolling mill line and strip breakage prevention rolling method

Abstract

The invention discloses a strip breakage prevention cold rolling mill line and a strip breakage prevention rolling method. The strip breakage prevention cold rolling mill line comprises a high-temperature uncoiler, a first turning roll, a rolling mill, a second turning roll and an outlet coiler which are arranged in sequence. The first turning roll and the second turning roll are configured in the mode that the part, between the first turning roll and the second turning roll, of a steel belt straightly penetrates through a roll gap of the rolling mill, and the high-temperature uncoiler comprises an uncoiler body, a heating device for heating the uncoiler body and a heat preservation cover arranged on the periphery of the uncoiler body. The high-temperature uncoiler is arranged on the cold rolling mill line, so that the hot rolled steel coil is preheated before cold rolling, the temperature of the steel coil before cold rolling is improved, the strip breakage rate during cold rolling is reduced, the length and occupied space of the cold rolling mill line are prevented from being increased, and the temperature drop of the outer layer of the steel coil when the steel coil is conveyed to the cold rolling mill line from preheating equipment is avoided; and the rolling of a previous steel coil and the preheating of the next steel coil can be achieved at the same time, and the rolling efficiency and the yield are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, relates to an anti-broken strip cold rolling mill train, and also relates to an anti-broken strip rolling method realized by using the anti-broken strip cold rolling mill train. Background technique [0002] In the process of rolling steel into finished products, it is usually completed by steel smelting→continuous casting→hot rolling→cold rolling. However, edge cracks and broken strips are very easy to occur during the cold rolling process, resulting in low product yield, especially When it is used to prepare high-grade non-oriented silicon steel, the strip breaking rate of cold rolling remains high, which is one of the problems that need to be solved urgently in the industry. [0003] Non-oriented silicon steel is the core material of motors and generators working in rotating magnetic fields, requiring good magnetic properties, including lower iron loss and higher magnetic induc...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an anti-broken strip cold rolling mill train and anti-broken strip rolling method to solve the problem that the high-grade non-oriented silicon steel in the prior art is prone to strip broken during the cold rolling process and affects the rolling efficiency of cold rolling and technical issues of yield

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