Method for predicting thickness of oil film on surface of roller in secondary cold rolling process

Abstract

The invention provides a method for predicting the thickness of an oil film on the surface of a roller in a secondary cold rolling process. The method comprises the following steps of S1, constructingthe oil film thickness prediction model on the surface of the roller in the secondary cold rolling process; S2, calculating the optimal value of each influence coefficient of the thickness of the oilfilm on the surface of the roller by adopting a Powell optimization algorithm; S3, substituting lambda ay, lambda by, lambda cy, lambda dy and lambda ey into a prediction model constructed in the step S1, and obtaining an optimal secondary cold rolling process roller surface oil film thickness prediction model; S4, collecting the pre-set lubricating process parameters of the roller of a secondarycold rolling unit; and S5, predicting the thickness Xi w0 and Xi w1 of the oil film on the surface of the inlet and outlet of the secondary cold rolling working roller according to the model in the step S3, obtaining the thickness Xi m0 and Xi m1 of the oil film on the surface of the inlet and outlet of a intermediate roller, and obtaining the thickness Xi b0 and Xi b1 of the oil film on the surface of the inlet and outlet of a supporting roller. The thickness of the oil film on the surface of the roller of the rolling deformation area of the corresponding secondary cold rolling unit can be predicted, the lubricating performance in the rolling process of the secondary cold rolling unit is controlled and improved, the production cost is reduced, and the enterprise benefit is improved.

Description

technical field [0001] The invention belongs to the technical field of cold rolling, in particular to a method for predicting the thickness of an oil film on the surface of a roll in a secondary cold rolling process. Background technique [0002] In recent years, with the increasingly fierce market competition in the iron and steel industry, tin-plated and chrome-plated strip products are developing in the direction of high strength and thinning. The secondary cold-rolling process is to cold-roll the strip after cold-rolling and annealing again, so as to increase the strength and reduce the thickness of the strip, and better adapt to the development direction of tinplate and strip products, so it has achieved rapid development. At the same time, in the secondary cold rolling production process, in order to reduce the rolling pressure and rolling power and improve the surface quality of the strip, it is generally necessary to use a direct injection system to lubricate the str...

AI Technical Summary

Problems solved by technology

In the past, the field research on the lubricating oil film thickness in the secondary cold rolling deformation zone mainly focused on the research on the oil film thickness on the strip surface, while the research on the lubricating oil film thickness model on the roll surface was less, lacking quantitative model analysis

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