Simulation method and simulation device for controlling thickness of hot dip coating

Abstract

The invention discloses a simulation method for controlling the thickness of a hot dip coating and a simulation device for controlling the thickness of the hot dip coating. The simulation device includes a chemical reagent reservoir, a transparent roller, an air knife, a diffuse reflection light source, a high-speed camera, a motor, a pressure detection instrument, a baffle and a fan; the transparent roller is arranged at an upper portion inside the chemical reagent reservoir; the motor drives the transparent roller; the surface of the transparent roller is provided with the pressure detection instrument; the diffuse reflection light source is arranged inside the transparent roller; one side of the roller is provided with the air knife; and one side of the air knife is provided with the high-speed camera which is located above the transparent roller. The simulation method includes the following steps that: (1) a simulation plating solution is injected into the chemical reagent reservoir, and the pressure detection instrument, the air knife and the motor are started, and a dynamic hot galvanizing process is simulated; (2) the high-speed camera is started to acquire images and data, and the thickness of the coating of the simulation plating solution and an image gradation corresponding data table is contrasted, and data analysis is performed; and (3) the simulation plating solution is collected, and cyclic operation is performed. With the simulation method and the simulation device for controlling the thickness of the hot dip coating adopted, parameters can be optimized, the times of repeated experiments can be reduced, work efficiency can be improved, and the consumption of hot galvanizing experiment-used steel bars and raw materials can be decreased.

Description

technical field [0001] The invention belongs to the field of hot-dip galvanizing, in particular to a dynamic simulation method and an experimental device for hot-dip galvanizing to control coating thickness. Background technique [0002] In the development of the hot-dip galvanizing process, in order to overcome the disadvantages of inaccurate zinc layer thickness control, thick and uneven zinc layer, a method of controlling the thickness of the zinc layer by applying fluid shock has emerged. "Hot dip galvanizing by air blowing method". This method uses a pair of slot-shaped nozzles across the entire width of the strip to spray a continuous flat airflow like a knife to blow off the zinc liquid on the surface of the strip and leave a uniform and appropriate zinc layer on the surface of the strip. , and let the excess zinc liquid flow back to the zinc pot, this device is called "air knife". After the air knife is introduced to control the thickness of the zinc layer of the s...

AI Technical Summary

Problems solved by technology

However, the existing devices for simulating the effect of the air knife flow field on the steel plate surface are limited to spraying air on the horizontal or vertical static steel plate surface, and the simulation is carried out by FLUENT finite element software in the state of no coating attached

Since there is no instrument for detecting air pressure and coating thickness, the actual data of accurate gas pressure and coating thickness cannot be obtained, and the effect of gas flow field cannot be obtained

In addition, the existing coating control simulation device is limited to the simulation machine for simulating the actual galvanizing production on site. For example, Northeastern University has developed a hot-dip galvanizing simulation test machine for strips, patent number CN201110042006.1; a laboratory Use a hot-dip galvanizing simulator, including the actual detection and execution device of hot-dip galvanizing, patent number CN201010160353.X. The above two experimental devices completely reproduce the hot-dip galvanizing process, which requires a lot of experimental equipment and cannot accurately simulate the dynamic impact of the air knife flow field. Effect of strip coating

[0004] Most of the existing experimental equipment for the hot-dip galvanizing process is a simulation device that can only establish a static air-knife flow field. There are almost no dynamic simulation methods for the study of the mechanism of the air-knife airflow during the actual galvanized production strip movement, and Accurate air knife flow field pressure detection equipment is not set

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