Nickel plate convexity detection method based on G1886 multifunctional instrument

Abstract

The invention belongs to the technical field of hot rolling detection, and provides a nickel plate convexity detection method based on a G1886 multifunctional instrument, which comprises the following steps: manufacturing nickel plate sample wafers with different specifications and thicknesses, analyzing chemical components of the nickel plate sample wafers with different specifications and thicknesses, inputting the specifications, thicknesses and chemical components of the nickel plate sample wafers into measurement real-time parameters of the multifunctional instrument, and completing automatic calibration. The method comprises the following steps: placing nickel plate sample wafers in a multifunctional instrument measurement area, determining an accurate nickel plate thickness compensation coefficient, and establishing a thickness compensation curve corresponding to the nickel plate sample wafers with different thicknesses; during measurement, the compensation amount is calculated according to the compensation curve, and finally the accurate thickness value of the nickel plate is calculated. According to the method, the problem that the G1886 multifunctional instrument cannot detect the thickness of the nickel plate is solved, the reject ratio of the nickel plate type is reduced, the quality of the nickel plate type is improved, stable and efficient nickel plate type measurement is achieved, and good economic benefits are obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of hot rolling detection, relates to the application of a G1886 multifunctional instrument, and specifically is a nickel plate convexity detection method based on the G1886 multifunctional instrument. Background Art

[0002] Hot rolling mill equipment layout Figure 1 As shown, it is divided into furnace area, rough rolling area, finishing rolling area and coiling area. The production process is that the slab is heated in the heating furnace according to the temperature specified by the process, and then first enters the rough rolling mill for rolling. The rough rolling vertical roll controls the width, and the flat roll controls the thickness. Reversible rolling is carried out in the rough rolling unit, generally 5 to 7 times. After rolling in the rough rolling unit, the strip reaches the preset target thickness, width and temperature. Then it enters the finishing mill for seven-stand flat roll continuous rolling to make the strip reach the preset target thickness and temperature. Finally, the strip is formed into a coil by the coiler.

[0003] The multifunctional instrument at the finishing exit is an important process for strip convexity detection. The multifunctional instrument can detect the convexity of hot-rolled strip in real time, so as to achieve the purpose of dynamically controlling the convexity of hot-rolled strip. Whether the multifunctional instrument can measure accurately and whether it can accurately feedback the convexity plays a vital role in improving the quality of the plate shape of the rolling line.

[0004] The principle of strip convexity detection is the same as that of thickness detection. The X-ray source emits stable rays. When the rays penetrate the test material, the ray intensity will decay, and the attenuation is related to the thickness of the test material. The detector receives the attenuated rays on the other side of the test material and then converts the ray intensity into a collectable signal and transmits it to the control computer to calculate the corresponding thickness value, thus realizing non-contact, online, real-time and accurate thickness measurement of the test material.

[0005] G1886 multifunctional instrument is an X-ray multifunctional instrument detection equipment designed based on pure iron samples with Fe as the main component. The alloy compensation B t The compensation coefficient is also based on Fe as the main component, rather than the compensation coefficient based on metal Ni as the main component. Therefore, the compensation coefficient calculated in this way cannot meet the nickel plate detection requirements of users. The traditional detection method is to measure by calling the nickel stainless steel thickness compensation system, and then perform manual experience compensation on the measurement results. There are large errors in the measurement results, and the phenomena of inaccurate plate measurement and large thickness deviation frequently occur. Summary of the invention

[0006] The purpose of the present invention is to provide a nickel plate convexity detection method based on the G1886 multi-function instrument, to solve the problem that the G1886 multi-function instrument cannot detect the thickness of the nickel plate, to reduce the unqualified rate of the nickel plate shape, to improve the quality of the nickel plate shape, to achieve stable and efficient nickel plate shape measurement, and to achieve good economic benefits.

[0007] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: A nickel plate convexity detection method based on G1886 multifunctional instrument comprises the following steps: S1. Make nickel plates of different thicknesses; S2. Analyze the chemical composition of nickel plate samples with different specifications and thicknesses; S3. Input the specification thickness and chemical composition of the nickel plate sample into the real-time measurement parameters of the multi-function instrument; S4, the multi-function instrument automatically retrieves the internal iron metal sample and completes the automatic calibration; S5. Place the nickel plate sample in the measurement area of ​​the multifunctional instrument, open the measurement baffle of the multifunctional instrument, complete the measurement, and determine the accurate nickel plate thickness compensation coefficient B0 (Ni) through multiple nickel plate sample calibration measurements through B0 (Ni) = x / y, where x is the thickness measured by the micrometer and y is the thickness measured by the multifunctional instrument; S6. After calculating the compensation coefficients corresponding to the nickel plate samples with different thicknesses, a thickness compensation curve corresponding to the nickel plate samples with different thicknesses is established; S7, when measuring nickel plates of the same material, the multifunctional instrument calls the thickness compensation curve established by S6 to calculate the compensation amount, thereby calculating the accurate thickness value of the nickel plate.

[0008] The beneficial effects of the present invention are as follows: compared with the existing measurement principle, the compensation curve recalibrated with samples of different thicknesses can accurately calculate the thickness of the nickel plate. After continuous debugging, the thickness control of the nickel plate and nickel alloy strip is qualitatively improved, meeting the requirements of strip thickness quality. After the multifunctional instrument adds the nickel plate detection curve, the thickness control accuracy of the nickel plate is greatly improved, the nickel plate shape is controlled in real time, the quality of the nickel plate shape is improved, and the process quality control and factory inspection can be effectively realized. The qualified rate of nickel plate thickness is increased from 40% to more than 99%, and the phenomenon of thickness exceeding the standard has never occurred again. After the control accuracy of the nickel plate is improved, it is expected that the quality objections of the nickel plate in the hot rolling mill will be greatly reduced, meeting user needs and ensuring the fulfillment of the contract. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a specification table of nickel plate samples with different thicknesses according to the embodiment of the present invention; Figure 2 It is a chemical composition comparison table of nickel plate samples of different specifications according to the embodiment of the present invention; Figure 3 This is a table of supplementary coefficients for thickness of nickel plate samples of different specifications; Figure 4 It is the thickness compensation curve corresponding to nickel plate samples with different thicknesses. DETAILED DESCRIPTION

[0010] The present invention will be further described below in conjunction with embodiments: The nickel plate convexity detection method based on the G1886 multifunctional instrument includes the following steps: S1. According to the process measurement requirements, make nickel plate samples of different specifications and thicknesses, such as Figure 1 Specification table of nickel plate samples with different thicknesses; S2. Analyze the chemical composition of nickel plate samples with different specifications and thicknesses, such as Figure 2 Chemical composition comparison table of nickel plate samples of different specifications; S3. Input the nickel plate sample thickness and chemical composition into the real-time measurement parameters of the G1886 multi-function instrument; S4, G1886 multi-function instrument automatically retrieves internal iron metal samples and completes automatic calibration; S5. Place the nickel plate sample in the measurement area of ​​the multi-function instrument, open the G1886 multi-function instrument measurement baffle, complete the measurement, and determine the accurate nickel plate thickness compensation coefficient B0 (Ni) through multiple nickel plate sample calibration measurements, such as Figure 3 The newly established nickel plate thickness supplement coefficient table is shown; S6. After calculating the compensation coefficients corresponding to the nickel plate samples with different thicknesses, a thickness compensation curve corresponding to the nickel plate samples with different thicknesses is established, such as Figure 4 As shown; S7, when measuring nickel plates of the same material, the multifunctional instrument calls the thickness compensation curve established by S6 to calculate the compensation amount, thereby calculating the accurate thickness value of the nickel plate.

[0011] Compared with the existing measurement principle, the compensation curve recalibrated with nickel plate samples of different thicknesses can accurately calculate the thickness of the nickel plate. After continuous debugging, the thickness control of nickel plates and nickel alloy strips has been qualitatively improved, meeting the requirements of strip thickness quality. Example 1

[0012] Measure the nickel plate with a thickness of 2.002 mm and a target temperature of 30°C. Figure 2 As shown in the table; First, input the nickel plate composition and temperature into the multi-function instrument system to complete data reading.

[0013] Then, place the 2.002mm nickel plate sample in the multi-function instrument measurement window, click on the measurement button, and the multi-function instrument automatically calls the revised nickel plate compensation curve to measure the actual thickness of the nickel plate: 1.988mm.

[0014] The thickness results during the measurement process were stable, with a thickness deviation of -0.014mm, which was within the control deviation range and met the measurement deviation requirements. Example 2

[0015] Measure the nickel plate with a thickness of 4.090 mm and a target temperature of 30°C. Figure 2 As shown in the table; First, input the nickel plate composition and temperature into the multi-function instrument system to complete data reading.

[0016] Then, place the 4.090mm nickel plate sample in the multi-function instrument measurement window, click on the measurement button, and the multi-function instrument automatically calls the revised nickel plate compensation curve to measure the actual thickness of the nickel plate: 4.073mm.

[0017] The thickness results during the measurement process were stable, with a thickness deviation of -0.017mm, which was within the control deviation range and met the measurement deviation requirements. Example 3

[0018] Measure the nickel plate with a thickness of 5.909 mm and a target temperature of 30°C. The composition is as follows Figure 2 As shown in the table; First, input the nickel plate composition and temperature into the multi-function instrument system to complete data reading.

[0019] Then, place the 5.909 mm nickel plate sample in the multi-function instrument measurement window, click on the measurement button, and the multi-function instrument automatically calls the revised nickel plate compensation curve to measure the actual thickness of the nickel plate: 5.933 mm.

[0020] The thickness results during the measurement process are stable, with a thickness deviation of 0.024mm, which is within the control deviation range and meets the measurement deviation requirements. Example 4

[0021] Measure the nickel plate with a thickness of 7.792 mm and a target temperature of 30°C. Figure 2 As shown in the table; First, input the nickel plate composition and temperature into the multi-function instrument system to complete data reading.

[0022] Then, place the 7.792mm nickel plate sample in the multi-function instrument measurement window, click on the measurement button, and the multi-function instrument automatically calls the revised nickel plate compensation curve to measure the actual thickness of the nickel plate: 7.815mm.

[0023] The thickness results during the measurement process are stable, with a thickness deviation of 0.023mm, which is within the control deviation range and meets the measurement deviation requirements. Example 5

[0024] Measure the nickel plate with a thickness of 8.792 mm and a target temperature of 30°C. Figure 2 As shown in the table; First, input the nickel plate composition and temperature into the multi-function instrument system to complete data reading.

[0025] Then, place the 8.792mm nickel plate sample in the multi-function instrument measurement window, click on the measurement button, and the multi-function instrument automatically calls the revised nickel plate compensation curve to measure the actual thickness of the nickel plate: 8.773mm.

[0026] The thickness results during the measurement process were stable, with a thickness deviation of -0.019mm, which was within the control deviation range and met the measurement deviation requirements.

Claims

1. A nickel plate convexity detection method based on G1886 multifunctional instrument, characterized in that: The steps include: S1. Make nickel plate samples of different specifications and thicknesses; S2. Analyze the chemical composition of nickel plate samples with different specifications and thicknesses; S3. Input the specification thickness and chemical composition of the nickel plate sample into the real-time measurement parameters of the multi-function instrument; S4, the multi-function instrument automatically retrieves the internal iron metal sample and completes the automatic calibration; S5. Place the nickel plate sample in the measurement area of ​​the multifunctional instrument, open the measurement baffle of the multifunctional instrument, complete the measurement, and determine the accurate nickel plate thickness compensation coefficient B0 (Ni) through multiple nickel plate sample calibration measurements through B0 (Ni) = x / y, where x is the thickness measured by the micrometer and y is the thickness measured by the multifunctional instrument; S6. According to the nickel plate thickness supplement coefficient determined in S5, a thickness compensation curve corresponding to nickel plate samples with different thicknesses is established; S7, when measuring nickel plates of the same material, the multifunctional instrument calls the thickness compensation curve established by S6 to calculate the compensation amount and calculate the accurate thickness value of the nickel plate.

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