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Quantitative description method for surface color of galvanized sheet

A quantitative description and color degree technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of rapid evaluation of the surface color of galvanized sheets, and achieve improved surface color, high work efficiency, and realization of The effect of online detection

Active Publication Date: 2016-06-29
武汉钢铁有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0006] At present, there is no method for rapid on-site evaluation of the surface color of galvanized sheets

Method used

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  • Quantitative description method for surface color of galvanized sheet
  • Quantitative description method for surface color of galvanized sheet
  • Quantitative description method for surface color of galvanized sheet

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Embodiment Construction

[0038] The present invention will be described in further detail below in conjunction with specific examples.

[0039] The method for quantitatively describing the surface color of galvanized sheet of the present invention comprises the following steps:

[0040] 1) Establish the relationship between the surface roughness Ra and the diffusion parameter σ, as shown in formula (1), where a, b, c, d, and e are five undetermined coefficients:

[0041] σ 2 = aR a 2 + bR a + c ( R a + d ) 2 ( ...

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Abstract

The invention provides a method for quantitatively describing the surface color of a galvanized sheet. Steps: 1) Establish the functional relationship between surface roughness Ra and diffusion parameter σ; 2) Select at least 5 galvanized sheets with different degrees of light and shade, measure their surface roughness Ra and diffusion parameter σ respectively, and obtain the formula for determining the undetermined coefficient ; 3) Select a galvanized sheet with a normal surface and measure the surface roughness Ra 0 , the diffusion parameter σ is calculated by the formula 0 , and use this as a benchmark; 4) For galvanized sheets with color difference, measure the surface roughness Ra n , and then calculate the diffusion parameter σ by the formula n ; 5) put σ n with σ 0 Compared to: σ n -σ 0 The value of σ is a positive number, that is, it is brighter, and the greater the deviation of the value, the brighter the color; σ n -σ 0 The value of is negative, that is, darker, and the greater the deviation of the value, the darker the color. The invention utilizes the surface roughness of the galvanized steel sheet to quantitatively determine the color difference level of the surface of the galvanized steel sheet on-line, the operation is simple and practical, and the work efficiency is high.

Description

technical field [0001] The invention relates to a method for evaluating the surface quality of a galvanized sheet, in particular to a method for quantitatively describing the surface color of a galvanized sheet. Background technique [0002] Due to the uneven thickness of the coating, the ups and downs of the coating, and the different thickness of the oxide film, it is difficult to obtain a uniform appearance of the galvanized sheet without spangles. Light is refracted to the surface to form a color difference, which greatly affects the appearance quality and corrosion resistance of the galvanized sheet, thereby affecting the market competitiveness of the galvanized sheet. The galvanized sheet applied to the outer panels of automobiles has high requirements on color, otherwise it will seriously affect the quality of subsequent painting, thereby seriously affecting the appearance of the car body. [0003] If you want to solve the color problem of galvanized sheet, you must ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 杨芃代敏敏陈晓海王元勋彭炜陈建桥范庆国刘海军
Owner 武汉钢铁有限公司
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