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9-degree board scratch analysis method

An analysis method and panel technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of large manpower, material resources, and low work efficiency, so as to reduce production losses, improve work efficiency, and reduce inspections The effect of difficulty

Inactive Publication Date: 2015-01-28
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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Problems solved by technology

In the investigation, the causes of these defects are often confused, and a large-scale investigation is carried out, which consumes huge manpower and material resources, and the work efficiency is very low.

Method used

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Embodiment

[0030] Example The 9-degree surface scratch analysis method includes the following steps:

[0031] ⑴ Establish sampling rules:

[0032] Such as figure 1 As shown, the speed curve of the roller in contact with the steel strip on the production line is called, and the starting time 1 is 9:28 minutes, and the ending time 4 is 9:29 minutes as the intercepted one-minute speed curve record, and recorded as " L”; Divide the curve into sixty segments according to the time direction, extract the maximum value 3 and the minimum value 2 from each segment in turn, and get two samples 6 for each segment, and divide all the maximum values ​​3 and minimum values ​​2 according to the time Sequentially form an array X[120]={x 1 , x 2 ,...,x 120} as an analysis sample.

[0033] ⑵Standard deviation analysis of the analysis samples:

[0034] Enter the array X[120] into an excel spreadsheet to generate a simplified diagram, that is, as figure 2 As shown in the simulation curve 7, call th...

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Abstract

The invention relates to a 9-degree board scratch analysis method. The 9-degree board scratch analysis method comprises the following steps: (1) establishing a sampling rule, namely calling a speed curve of a roller which is in contact with strip steel on a production line, selecting a curve record at a relatively stable time period, intercepting a one-minute curve from the curve record in the time period and marking the one-minute curve as L; uniformly dividing the curve L into sixty segments according to the time direction, and extracting a maximum value and a minimum value from each segment in sequence to form an array X [120]={X1, X2,..., X120} as an analysis sample; (2) carrying out standard deviation analysis on the analysis sample to obtain a standard deviation; (3) when the standard deviation is greater than 0.8 percent, judging that the board scratch defects are caused by speed deviation; and (4) formulating a method for solving the speed deviation. According to the 9-degree board scratch analysis method, the working efficiency is effectively improved and the production loss caused by defects is reduced.

Description

technical field [0001] The invention relates to the technical field of galvanizing, in particular to a 9-degree surface scratch analysis method. Background technique [0002] Solving strip scratch defects in galvanized production is a difficult and lengthy process. There are mainly two sources of scratch defects currently recognized: scratches on raw substrates and roll surfaces. With the improvement of production technology and the accumulation of experience, the defects caused by the raw substrate can be gradually identified, but there is no way to judge the scratches on the roll surface of the galvanizing line itself. Scratches on the surface of the plate are mainly caused by the mutual sliding between the strip steel and the roll surface. The main reasons are discrepancies in the roll diameter, convexity of the roll surface, and deviation of the rotational speed. After discussion and research, how to judge the scratch caused by the speed deviation and how much the devi...

Claims

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Application Information

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IPC IPC(8): G06F19/00G01N3/56
Inventor 陈代兵连旭东纪马力郑跃强董世文
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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