Comprehensive setting method for surface roughness of upper and lower work rolls suitable for tandem cold rolling mill

Abstract

The invention discloses a comprehensive setting method suitable for original roughness of surfaces of upper and lower working rolls of a cold continuous rolling unit, belonging to the field of cold rolling. The method is characterized in that according to the coining ratio relative coefficient of the upper and lower surfaces of strip steel of the unit, product technological parameters and on-site technological parameters in a roll changing cycle are collected; real-time roughness of the upper and lower working rolls when the kth reel is produced is obtained; optimization setting values of roughness of the upper and lower rolls are calculated; by setting reasonable original roughness of the surfaces of the upper and lower working rolls, the difference of emulsion adhesion amount of the upper and lower surfaces of the strip steel is compensated through the roughness setting of the upper and lower working rolls, and roughness difference between the upper and lower surfaces of the strip steel is then reduced, so that the surface quality of the strip steel is ensured. The comprehensive setting method can be widely applied to machining treatment of the surfaces of the upper and lower working rolls of the cold continuous rolling unit and the field of production technique control of the cold continuous rolling unit.

Description

technical field [0001] The invention belongs to the field of cold rolling, and in particular relates to a method for comprehensively setting the original surface roughness of upper and lower work rolls suitable for a continuous cold rolling mill. Background technique [0002] In the continuous cold rolling production of strip steel, the roughness of the upper and lower surfaces of the finished strip steel is often inconsistent. After investigation and research, it is found that this phenomenon is caused by the difference in the amount of emulsion attached to the upper and lower surfaces of the strip steel. [0003] Generally speaking, when designing a rolling mill, it is necessary to ensure that the amount of emulsion sprayed on the upper and lower surfaces of the strip is the same, so most rolling mill designs will arrange an equal number of the same type of nozzles at the corresponding positions on the upper and lower surfaces of the strip, but in fact , the emulsion spray...

AI Technical Summary

Problems solved by technology

[0006] According to formula (1), it can be seen that the amount of emulsion attached will affect the thickness of the oil film on the surface of the strip. It can be known from the rolling theory that the thickness of the oil film will directly correspond to the coefficient of friction, which will lead to the difference in roughness between the upper and lower surfaces of the strip.

[0007] The difference in roughness between the upper and lower surfaces of the strip will bring inconvenience to the production of downstream customers, increase the negative evaluation of the company's brand, and have a negative impact on the company.

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