Method for setting concentration of emulsion in rolling of five-rack cold continuous rolling unit extremely thin band

Abstract

The invention discloses a method for setting concentration of emulsion in rolling of a five-rack cold continuous rolling unit extremely thin band. The method includes the following steps: (1) collecting characteristic parameters of main devices of a unit and to-be-rolled bands, main rolling process parameters and process lubricating system parameters, (2) defining related process parameters, (3) computing roll bending force and the roll channeling amount, (4) assigning related search process parameters, (6) computing concentration process parameters, (6) computing the search process speed of the highest rolling speed, (7) computing friction coefficients of various racks under the current condition, (8) computing rolling force, rolling power, slip factors, heat slip damage indexes and vibration coefficients of the various racks under the current condition, (9) computing heat convexity degrees of working rollers of the various racks, (10) computing an exit plate shape and the pressing width, and (11) obtaining and outputting the optimum proportion concentration. The steps are executed by a computer. According to the method, the rolling speed can be quickened, the rolling efficiency can be guaranteed, slip, heat slip damage and vibration are avoided, and it is guaranteed that the exit plate shape of the final rack and the pressing width of the roller ends of the working rollers are the smallest.

Description

technical field [0001] The invention relates to the field of metallurgical cold rolling, and is particularly suitable for a method for setting the concentration of emulsion in ultra-thin strip rolling of a five-stand cold tandem rolling mill. Background technique [0002] With the intensification of market competition, users have increasingly strong demand for strip thickness reduction, requiring manufacturers to provide 0.17mm or even thinner products. However, according to the actual experience in the field, as the strip thickness decreases, related defects such as vibration, slipping, and thermal slipping are easily generated during the production process, especially the impact on the vibration of the rolling mill is particularly obvious, and the vibration of the rolling mill will be in the strip. Alternating light and dark stripes perpendicular to the rolling direction are formed on the surface of the material or the thickness deviation at the exit is too large, which af...

AI Technical Summary

Problems solved by technology

That is to say, the change of the emulsion concentration can affect the occurrence probability of slipping, thermal slipping, vibration and other defects during the rolling process, as well as the exit shape of the last stand and the pressing width of the work roll, thus finally affecting the rolling speed

If the concentration of the emulsion is set unreasonably, it may cause the rolling speed of the unit to increase and affect the rolling efficiency

In the past, the setting of the emulsion concentration on site basically relied on the experience of the operator. The same concentration was used for all specifications of strip steel, resulting in low rolling speed or low Poor surface quality brings great economic loss to the unit

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