Setting method of emulsion concentration in ultra-thin strip rolling of five-stand cold tandem mill

Abstract

A method for setting the concentration of the emulsion in the ultra-thin strip rolling of a five-stand cold tandem rolling unit, comprising the following steps executed by a computer: 1. Collecting the main equipment of the unit, the characteristics of the strip to be rolled, the main rolling process and Process lubrication system parameters; 2. Define relevant process parameters; 3. Calculate roll bending force and roll shifting amount; 4. Assign values ​​to relevant search process parameters; 5. Calculate concentration process parameters; 6. Calculate search process speed of maximum rolling speed; 7. Calculate the friction coefficient of each stand under the current conditions; 8. Calculate the rolling force, rolling power, slip factor, thermal slip index and vibration coefficient of each stand under the current conditions; 9. Calculate the working roll of each stand Thermal convexity; 10. Calculate the outlet plate shape and pressing width; 11. Obtain and output the optimal ratio concentration. The invention can increase the rolling speed, ensure the rolling efficiency, avoid slipping, thermal slipping and vibration, and ensure the minimum shape of the end stand exit and the pressing width of the work roll end.

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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