Cold rolling spray device and method

Abstract

The invention discloses a cold-rolling spraying device. The cold-rolling spraying device is used for spraying emulsion on the surface of strip steel, and comprises a first storage tank used for storing the emulsion with a first concentration, a second storage tank used for storing the emulsion with a second concentration, an upper spraying beam arranged above the strip steel and a lower spraying beam arranged below the strip steel, wherein a first booster pump is arranged between the first storage box and the upper spraying beam, a second booster pump is arranged between the second storage boxand the lower spraying beam, a plurality of upper nozzles capable of spraying the emulsion on the upper surface of the strip steel are arranged on the upper spraying beam, and a plurality of lower nozzles capable of spraying the emulsion to the lower surface of the strip steel are arranged on the lower spraying beam. The invention further discloses a cold-rolling spraying method utilizing the cold-rolling spraying device. According to the cold rolling spraying device and method, the thickness difference of an oil film formed on the upper surface and the lower surface of the strip steel can beminimized, the quality of the cold-rolling strip steel product and the high-speed and stable production are ensured.

Description

technical field [0001] The invention relates to the field of cold rolling, in particular to a cold rolling spray device and method. Background technique [0002] At present, emulsion is generally used for process lubrication in the cold rolling production process to reduce the friction coefficient in the rolling deformation zone, reduce the rolling pressure and rolling power, and slow down the wear of the roll. Emulsion refers to the solution formed by uniformly dispersing rolling oil in water at a certain concentration as a dispersed phase. The emulsion can be sprayed on the surface of the steel strip through the cold rolling spray device, and the surface of the steel strip will gradually precipitate an oil film to complete the lubrication of the surface of the steel strip. [0003] In the existing spraying device for cold rolling, the emulsion is sprayed on the upper and lower surfaces of the steel strip by nozzles with a certain concentration. However, due to gravity, o...

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Problems solved by technology

However, due to gravity, only a part of the emulsion sprayed on the lower surface of the strip is adsorbed on the lower surface of the strip and gradually precipitates an oil film on the lower surface, while the other part of the emulsion drips and is lost, which leads to the formation of an oil film on the lower surface of the strip. The thickness of the oil film is smaller than the thickness of the oil film formed on the upper surface of the strip, and the friction coefficient of the lower surface of the strip is larger than that of the upper surface of the strip, which in turn causes uneven extension of the upper and lower surfaces of the strip in the rolling deformation zone, affecting the high-speed rolling of the strip. The stability of the manufacturing process. At the same time, the difference in the friction coefficient between the upper and lower surfaces of the strip will cause the difference in the quality of the upper and lower surfaces of the strip. In severe cases, it will cause production defects. Such defects are especially manifested on the lower surface of the strip.

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