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Compensation method for measured thickness of zinc aluminized layer

A technology of measuring thickness and compensation method, which is applied in the direction of measuring devices, instruments, and using wave/particle radiation, etc., can solve the problems of no thickness compensation function of galvanized layer and measurement value error, so as to improve thickness control accuracy and reduce measurement Effect of Thickness Deviation

Inactive Publication Date: 2016-04-13
ANGANG STEEL CO LTD
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Problems solved by technology

The original thickness gauge can only correct the galvanized and aluminum-coated layers separately, and there is no compensation function for the thickness of the galvanized and zinc-coated layers, which leads to errors in the measured values

Method used

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  • Compensation method for measured thickness of zinc aluminized layer
  • Compensation method for measured thickness of zinc aluminized layer
  • Compensation method for measured thickness of zinc aluminized layer

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Embodiment Construction

[0026] The specific process and steps of the method for measuring the thickness compensation of the galvanized layer of the present invention are:

[0027] 1. Determine the compensation coefficient

[0028] According to the measurement principle of the strip steel thickness gauge, when the rays emitted by the ray source pass through the measured object, attenuation will occur, and the attenuation range depends on the material and thickness of the measured object. When the material of the measured object remains unchanged, then The intensity of rays passing through the measured body will decay exponentially with the thickness of the measured body. When the thickness gauge measures the total thickness of the galvanized sheet, the intensity of the ray after passing through the galvanized sheet is I=I 0 e -(μ1d1+μ2d2) ,

[0029] resulting in the measured thickness

[0030] I 0 : initial intensity of the ray; d x : Thickness measured by the thickness gauge; d 1 : substrate ...

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Abstract

A compensation method for measured thickness of a zinc aluminized layer includes the following steps of: firstly determining a compensation coefficient, obtaining the compensation coefficient through formula transformation and condition setting according to the thickness gauge measured thickness and the actual thickness of a zinc aluminized sheet; secondly determining a compensation coefficient value according to a measured specific value of [mu]u2 / [mu]u1 of a pure aluminium zinc sample sheet and a found specific value of [mu]u3 / [mu]u1; and finally modifying a first-level computer zinc aluminized layer measured thickness compensation program, and multiplying a d2 of an original zinc aluminized layer measured thickness compensation program by the compensation coefficient value to achieve automatic compensation of the measured thickness of the zinc aluminized layer, wherein the measured thickness is more close to the actual thickness. The method can effectively decrease a thickness gauge measured thickness deviation, and greatly improve the thickness control accuracy of the zinc aluminized sheet, so that the quality pass rate of the zinc aluminized sheet can be increased to 99.6% from 76.4%.

Description

technical field [0001] The invention belongs to the technical field of cold-rolled coating, in particular to a compensation method for measuring the thickness of a cold-rolled galvanized layer. Background technique [0002] In the process of producing galvanized sheets on the cold-rolled galvanizing line, it is often found that the measured value of the thickness gauge of the exported finished product is inaccurate, and the deviation from the actual thickness is more than 20 μm, which leads to the closure of bulk products and the high pass rate of galvanized sheet thickness decrease, resulting in huge economic losses. [0003] After analysis, the thickness gauge at the exit of the galvanizing line is a thickness gauge with a single material. Because the material of the coating is different from that of the substrate, the absorption capacity of rays is different, which requires correction of the thickness of the coating. The original thickness gauge can only correct the galv...

Claims

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Application Information

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IPC IPC(8): G01B15/02
Inventor 阚迪柳庆坡柳军王弢宗旭赵连江韩克姜镇
Owner ANGANG STEEL CO LTD
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