Cold rolling direct spraying method of emulsified liquid

Abstract

The invention discloses a cold rolling direct spraying method of the emulsified liquid. The emulsified liquid is sprayed towards the upper surface and the lower surface of strip steel through an upper spray nozzle which is arranged on the upper surface of the strip steel and a lower spray nozzle which is arranged on the lower surface of the strip steel; the distance s1 between the upper spray nozzle and the center of a rolling mill and the spraying amount F1 of the upper spray nozzle are utilized as a reference target; the optimal distance s2* between the lower spray nozzle and the center of the rolling mill and the spraying amount F2 of the lower spray nozzle are determined according to the reference target; the flow of the emulsified liquid is controlled by flow valves which are arranged on branch pipelines of the upper spray nozzle and the lower spray nozzle. According to the technical scheme of the cold rolling direct spraying method of the emulsified liquid, oil films which are arranged on the upper surface and the lower surface of the strip steel can have the equal thickness due to the model calculation and the flow valves and accordingly the problems of the insufficient lubrication, the lubrication characteristic difference between the upper surface and the lower surface and the like caused by the emulsified liquid dripping loss of the lower surface of the strip steel are solved, the same lubrication condition in the rolling areas corresponding to an upper working roll and a lower working roll is achieved, the stability of the rolling process is improved, the transformed scale is small, and the field operation is convenient.

Description

technical field [0001] The invention relates to an emulsion spraying method, in particular to an emulsion spraying method in a cold rolling process. Background technique [0002] For the cold rolling process, good process lubrication is the basis for ensuring rolling stability. When rolling cold-rolled strips with thin specifications and high surface quality requirements, the direct injection emulsion method is widely used. Especially in the field of secondary cold rolling, the emulsion in the direct injection system is sprayed onto the surface of the strip through the nozzles on the spray rack to form a uniform and moderately thick oil film, which is the key to the production of secondary cold rolling strip. [0003] In the production process, the most important function of process lubrication is to reduce the friction coefficient and friction force on the contact arc surface of the deformation zone, reduce the total rolling pressure and energy consumption, increase the pa...

AI Technical Summary

Problems solved by technology

However, due to the addition of a row of spray racks in the rack, the equipment is relatively crowded, difficult to maintain, and the adjustment range is limited

Images