Method for improving yield of reciprocating rolled plate

Abstract

The invention belongs to the technical field of plate cold rolling methods, and relates to a method for improving the yield of a reciprocating rolled plate. The method is used for improving the yield of cold-rolled plates and strips obtained in a reciprocating rolling manner. According to the technical scheme, a steel strip head guide strip is welded to the head of a steel strip to be rolled, and a steel strip tail guide strip is welded to the tail of the steel strip to be rolled; and in the reciprocating rolling process, the steel strip head guide strip and the steel strip tail guide strip are wound around a winding machine mandrel of a winding machine, winding of the steel strip to be rolled is replaced for obtaining tension, and therefore the parts, unable to be rolled, of the head and the tail of the steel strip to be rolled are greatly reduced, the yield is remarkably improved, and according to statistics, the steel strip rolling yield of a single-rack reciprocating rolling unit can be improved to 96.7% from 88%. The method is an innovation in the steel strip cold rolling methods; and by means of the measures of simply welding the steel strip guide strips, the problems which are not solved by the reciprocating rolling unit for a long time are solved, the rolling yield of the steel strip of the reciprocating rolling unit is greatly improved, the economic benefits of enterprises are remarkably improved, and the method is worthy of use and popularization in the industry.

Description

technical field [0001] The invention relates to a method for increasing the finished product rate of chilled coils during reciprocating rolling of cold-rolled strips, and belongs to the technical field of plate cold-rolling methods. Background technique [0002] Hot-dip galvanized products and annealed products based on cold-rolled sheets are widely used, resulting in an increase in the consumption of cold-rolled sheets year by year. At present, the annual production capacity of domestic cold-rolled plates has exceeded 100 million tons, more than half of which are rolled by single-stand and double-stand reciprocating rolling mills. Compared with the continuous rolling mill, the reciprocating rolling mill has the advantages of less investment and quick results, and is more suitable for small batch and multi-variety production. However, the reciprocating rolling mill also has the disadvantage of low yield, and the smaller the total length of the pickled strip, the more obviou...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for improving the yield of reciprocating rolling plates, which can solve the problem that the head and tail of the strip cannot be rolled when the reciprocating rolling unit is working, the thickness exceeds the standard, and the yield is low , to minimize the length of the excess thickness section at the head and tail of the strip, significantly increase the composition rate of the reciprocating rolling mill, and improve economic benefits

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