A method for setting differential flow rate of emulsion in tandem cold rolling mill

Abstract

The invention provides an emulsion flow differential setting method for a cold continuous rolling unit, and relates to a control device or method specially suitable for a metal rolling machine or machined products of the metal rolling machine, in particular to a spray flow control method for the emulsion on the upper surface and the lower surface of strip steel of a cold continuous rolling unit in the cold continuous rolling unit rolling process. The emulsion flow differential setting method comprises the following steps that the gravity loss coefficient of the emulsion is calculated; the technology parameters of site equipment are collected; the flow setting comprehensive index of the emulsion is calculated; and an optimum setting value of the emulsion on the upper surface and the lower surface of the strip steel is obtained after searching. According to the emulsion flow differential setting method for the cold continuous rolling unit, flow differential setting for the spray volume of the emulsion on the upper surface and the lower surface of the strip steel is conducted, and the spray flow of the emulsion on the upper surface and the lower surface of the strip steel is adjusted, so that the spray flow differentiation of the emulsion on the upper surface and the lower surface of the strip steel is achieved; and the loss, caused by the influence of the gravity, of the emulsion on the lower surface of the strip steel is compensated, the adhesion volume difference of the emulsion on the upper surface and the lower surface of the strip steel is reduced, and therefore the roughness difference of the upper surface and the lower surface of the strip steel is reduced, the quality of the strip steel surfaces is guaranteed, brand competitiveness is improved, and benefits are brought to an enterprise.

Description

technical field [0001] The invention relates to a control device or method specially suitable for a metal rolling mill or its processed products, in particular to a method for controlling the injection flow rate of emulsion on the upper and lower surfaces of a strip in a tandem cold rolling mill during the rolling process of a tandem cold rolling mill. Background technique [0002] In the continuous cold rolling production process of strip steel, the emulsion has the functions of lubricating and cooling. Generally speaking, the amount of emulsion attached to the upper and lower surfaces of the strip should be the same, so most rolling mills will arrange equal numbers of nozzles of the same type at the corresponding positions on the upper and lower surfaces of the strip when designing, and set them according to the width grade. Emulsion flow, optimized setting for the total flow of five racks. Chinese invention patent application "Method for setting emulsion concentration in...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for setting the differential flow rate of the emulsion in the cold tandem mill, by setting the differential flow rate of the emulsion on the upper and lower surfaces of the strip, compensating for the loss of the emulsion on the lower surface of the strip, and solving the problem of strip The amount of emulsion attached to the upper and lower surfaces is different, resulting in a difference in the roughness of the upper and lower surfaces of the strip product, which affects the technical problems of the surface quality of the strip

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