Cold rolling unit and cold rolling process

Abstract

The invention discloses a cold rolling unit and a cold rolling process, and belongs to the technical field of cold rolling. The cold rolling unit comprises a tail end rolling mill, and at least two front end rolling mills are arranged at the upstream position of the tail end rolling mill in a series-connection manner; the rolling directions of the front end rolling mills are perpendicular to the rolling direction of the tail end rolling mill, and the rolling directions of the front end rolling mills are the same; and the rolling speed of the cold rolling process ranges from 180m / min to 2000m / min. When the two front end rolling mills carry out rolling in the same direction, the sizing reduction of the first front end rolling mill is 0.3 time to 0.7 time the target sizing reduction, and the second front end rolling mill completes the target sizing reduction allowance. Compared with traditional equipment and process, the unit and the cold rolling process have the advantages that the production speed can be remarkably improved, and the enterprise income is greatly increased.

Description

technical field [0001] The invention relates to a steel rolling mill and a process, in particular to a cold rolling mill and a cold rolling process, belonging to the technical field of cold rolling. Background technique [0002] Steel bar cold rolling is an important part of steel processing technology. The steel bar cold rolling unit generally uses two rolling mills. The roll gaps of the two rolling mills are perpendicular to each other. The second rolling mill then reduces the diameter of the steel bar and rolls it into a "round". The traditional two rolling mills are equipped with driving mechanisms. This method often causes many problems due to the mismatch of rolling speed. To solve this problem, the patent 200810085062.1 proposed Active and passive rolling mill technology solves this problem, but in the production of active and passive rolling mills, a passive rolling mill is set up. In the production of cold-rolled ribbed steel bars, this "one drag one" method is used...

AI Technical Summary

Problems solved by technology

[0002] Steel bar cold rolling is an important part of steel processing technology. The steel bar cold rolling unit generally uses two rolling mills. The roll gaps of the two rolling mills are perpendicular to each other. The second rolling mill then reduces the diameter of the steel bar and rolls it into a "round". The traditional two rolling mills are equipped with driving mechanisms. This method often causes many problems due to the mismatch of rolling speed. To solve this problem, the patent 200810085062.1 proposed Active and passive rolling mill technology solves this problem, but in the production of active and passive rolling mills, a passive rolling mill is set up. In the production of cold-rolled ribbed steel bars, this "one drag one" method is used for large deformation and high-speed rolling It is easy to cause accidents and defects such as steel bar breaking and product ear shape. In practice, the rolling speed of this rolling mill can only reach 180 m / min at most. After exceeding 180 m / min, the steel bar is very easy to break during rolling. In the current development of high-speed cold rolling, a cold rolling mill and process capable of high-speed rolling is required in the production of cold-rolled ribbed steel bars.

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