Insulating coating thickness uniformity detection method

Abstract

The invention provides a method for detecting the thickness uniformity of an insulating coating. A method for detecting the thickness uniformity of an insulating coating relates to the technical field of coatings, and comprises the following steps: S1, placing an insulating coating test piece on a detection platform, wiping the surface with gauze, checking and treating obvious defects, and calibrating the flatness of the detection platform by using a high-precision gradienter to ensure that the surface horizontal error does not exceed 0.1 mm, so as to provide a stable reference for placing the test piece; and when the surface of the coating is wiped by gauze, gentle operation is needed, if oil stains on the surface of the coating are heavy, a proper amount of cleaning agents with high volatility and no corrosion effect on the coating can be used for auxiliary cleaning, and when the cleaning agents are used, the gauze needs to be dipped in a small amount of the cleaning agents and is wiped gently in the same direction. The method for detecting the thickness uniformity of the insulating coating has the advantages of being convenient to use and low in cost.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to a method for detecting the uniformity of insulating coating thickness. Background Technology

[0002] Insulating coatings are widely used in electrical equipment manufacturing and electronic component production. The uniformity of the coating thickness directly affects its insulation performance, protective performance, and overall service life. Currently, common methods for detecting the uniformity of insulating coating thickness include eddy current thickness measurement and ultrasonic thickness measurement. While these methods have a certain degree of accuracy, they require specialized equipment, are complex to operate, costly, and demand highly skilled operators. In scenarios where cost-effectiveness and ease of operation are critical, a simple, convenient, and low-cost method for detecting the uniformity of insulating coating thickness is urgently needed.

[0003] Utility Invention Content

[0004] The technical problem solved by this invention is to provide a convenient, easy-to-use, and low-cost method for detecting the uniformity of insulation coating thickness.

[0005] 2. To solve the above-mentioned technical problems, the present invention provides a method for detecting the uniformity of insulation coating thickness, comprising the following steps:

[0006] S1. Place the insulating coating specimen on the testing platform, wipe the surface with gauze, and check and treat obvious defects;

[0007] S2. Divide the surface of the insulating coating specimen that has been wiped clean in S1 into several regular test areas with a side length or radius not exceeding 50 mm.

[0008] S3. Mark multiple evenly distributed detection points in the detection area of ​​S2 according to the prescribed method;

[0009] S4. Insert the probe into the coating at each detection point in S3 until it reaches the substrate surface. Measure the insertion depth with a vernier caliper, and take the average value of the three measurements at each detection point as the thickness value.

[0010] S5. Record the thickness values ​​of each detection point in S4, and calculate the average, maximum, minimum and standard deviation of the coating thickness in each detection area.

[0011] S6. By comparing the standard deviation of each test area with the standard value, determine whether the uniformity of the insulation coating thickness meets the requirements.

[0012] Preferably, in step S1, a high-precision level is used to calibrate the flatness of the testing platform to ensure that its surface level error does not exceed 0.1 mm, providing a stable reference for the placement of the specimen.

[0013] Preferably, when wiping the coating surface with gauze in S1, the operation should be gentle. If the coating surface is heavily soiled with oil, use an appropriate amount of anhydrous ethanol or other highly volatile cleaning agent that does not corrode the coating to assist in cleaning.

[0014] Preferably, the probe is made of a metal material with high hardness, such as a stainless steel probe.

[0015] Preferably, the probe must remain vertical throughout the measurement process to reduce measurement errors caused by tilting.

[0016] Preferably, in step S3, the selected detection point should be located at a relatively flat area of ​​the coating.

[0017] Preferably, in step S3, different colored markers are used to distinguish different detection areas, which facilitates rapid identification and measurement.

[0018] Preferably, after each measurement in S5, the measurement sequence number is marked next to the detection point to prevent data recording confusion.

[0019] Preferably, the regular detection area includes a combination of rectangular area, annular area and fan-shaped area, the distance between adjacent detection points in the rectangular area is 10-20mm, and the number of detection points in the annular area and the fan-shaped area is not less than 5.

[0020] Compared with related technologies, the method for detecting the uniformity of insulation coating thickness provided by the present invention has the following advantages:

[0021] This invention provides a method for detecting the uniformity of insulation coating thickness. This method does not require complex professional instruments and equipment; it can be completed using only simple physical tools such as probes and vernier calipers. It is easy to operate and inexpensive. By reasonably dividing the detection area and marking the detection points, it can comprehensively and accurately reflect the uniformity of the coating thickness, providing an effective detection means for the quality control of insulation coatings. Attached Figure Description

[0022] Figure 1 This is a flowchart illustrating the method for detecting the uniformity of insulation coating thickness provided by the present invention. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please refer to the following: Figure 1 In this invention, the method for detecting the uniformity of insulating coating thickness includes:

[0025] S1. Place the insulating coating specimen on the testing platform, wipe the surface with gauze, check and treat obvious defects, and use a high-precision level to calibrate the flatness of the testing platform to ensure that its surface level error does not exceed 0.1mm, providing a stable reference for specimen placement. When wiping the coating surface with gauze, operate gently. If the coating surface is heavily soiled with oil, an appropriate amount of highly volatile cleaning agent such as anhydrous ethanol that does not corrode the coating can be used to assist in cleaning. When using cleaning agent, dip the gauze in a small amount of cleaning agent and wipe gently in the same direction. After cleaning, wait for the residual cleaning agent on the coating surface to completely evaporate before proceeding with subsequent testing steps to ensure the accuracy and reliability of the test.

[0026] S2. Divide the surface of the insulating coating specimen, which has been wiped clean in S1, into several regular testing areas with a side length or radius not exceeding 50 mm; the regular testing areas include combinations of rectangular areas, annular areas, and fan-shaped areas, with the spacing between adjacent testing points in the rectangular areas being 10-20 mm, and the number of testing points in each of the annular and fan-shaped areas being no less than 5.

[0027] S3. Mark multiple evenly distributed test points in the test area of ​​S2 according to the prescribed method. If there are uneven conditions such as small bumps or depressions on the coating surface during the marking of test points, such positions should be avoided and test points should be selected again to ensure that the measurement points are in relatively flat areas of the coating, so that the measurement data are more representative. At the same time, different colored markers can be used to distinguish different test areas for the marking of test points, which facilitates quick identification and measurement.

[0028] S4. Insert the probe into the coating at each detection point in S3 until it reaches the substrate surface. Measure the insertion depth with a vernier caliper, and take the average value as the thickness value for each detection point three times. The probe can be made of a metal material with high hardness, such as stainless steel. This not only ensures that it is not easily bent or deformed during the insertion process, maintaining measurement stability, but also that the smooth surface of the metal material makes it easy to clean residual coating debris. In addition, to meet the detection requirements of coatings with different thicknesses and hardnesses, probes of different specifications, such as different lengths and diameters, can be prepared to improve the applicability of the detection method.

[0029] S5. Record the coating thickness value at each test point and create a test data table. Calculate the average, maximum, minimum, and standard deviation of the coating thickness within each test area. The average value reflects the overall level of coating thickness in the test area, the maximum and minimum values ​​reflect the range of coating thickness fluctuation, and the standard deviation reflects the uniformity of coating thickness; the smaller the standard deviation, the more uniform the coating thickness. After each measurement, mark the measurement sequence number next to the test point to prevent data recording confusion.

[0030] S6. By comparing the standard deviation of each test area with the standard value, determine whether the thickness uniformity of the insulating coating meets the requirements; judge the test results according to the preset thickness uniformity standard. If the standard deviation of the coating thickness in all test areas is less than or equal to the preset standard value, the thickness uniformity of the insulating coating is considered to meet the requirements; if the standard deviation of the coating thickness in one or more test areas is greater than the preset standard value, the thickness uniformity of the insulating coating is considered to not meet the requirements, and the coating process needs to be adjusted.

[0031] Compared with related technologies, the method for detecting the uniformity of insulation coating thickness provided by the present invention has the following advantages:

[0032] The method for detecting the uniformity of insulation coating thickness provided by this invention does not require complex professional instruments and equipment. It can be completed using only simple physical tools such as probes and vernier calipers. It is easy to operate and low in cost. By reasonably dividing the detection area and marking the detection points, it can comprehensively and accurately reflect the uniformity of the coating thickness, providing an effective detection means for the quality control of insulation coatings.

[0033] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for detecting the uniformity of insulation coating thickness, characterized in that, Includes the following steps: S1. Place the insulating coating specimen on the testing platform, wipe the surface with gauze, and check and treat obvious defects; S2. Divide the surface of the insulating coating specimen that has been wiped clean in S1 into several regular test areas with a side length or radius not exceeding 50 mm. S3. Mark multiple evenly distributed detection points in the detection area of ​​S2 according to the prescribed method; S4. Insert the probe into the coating at each detection point in S3 until it reaches the substrate surface. Measure the insertion depth with a vernier caliper, and take the average value of three measurements at each detection point as the thickness value. S5. Record the thickness values ​​of each detection point in S4, and calculate the average, maximum, minimum and standard deviation of the coating thickness in each detection area. S6. By comparing the standard deviation of each test area with the standard value, determine whether the uniformity of the insulation coating thickness meets the requirements.

2. The method for detecting the uniformity of insulation coating thickness according to claim 1, characterized in that, In step S1, a high-precision level is used to calibrate the flatness of the testing platform to ensure that its surface level error does not exceed 0.1 mm, providing a stable benchmark for the placement of the specimen.

3. The method for detecting the uniformity of insulation coating thickness according to claim 2, characterized in that, When wiping the coating surface with gauze in S1, the operation should be gentle. If the coating surface is heavily soiled with oil, use an appropriate amount of anhydrous ethanol or other highly volatile cleaning agents that do not corrode the coating to assist in cleaning.

4. The method for detecting the uniformity of insulating coating thickness according to claim 3, characterized in that, The probe is made of a metal with high hardness, such as a stainless steel probe.

5. The method for detecting the uniformity of insulating coating thickness according to claim 4, characterized in that, The probe must remain vertical throughout the measurement process to reduce measurement errors caused by tilting.

6. The method for detecting the uniformity of insulating coating thickness according to claim 5, characterized in that, In step S3, the selected detection point should be located where the coating is relatively flat.

7. The method for detecting the uniformity of insulating coating thickness according to claim 6, characterized in that, In step S3, different colored markers are used to distinguish different detection areas, which facilitates rapid identification and measurement.

8. The method for detecting the uniformity of insulating coating thickness according to claim 7, characterized in that, After each measurement in S5, the measurement sequence number is marked next to the detection point to prevent data recording confusion.

9. The method for detecting the uniformity of insulating coating thickness according to claim 8, characterized in that, The regular detection area includes a combination of rectangular, annular, and fan-shaped areas. The distance between adjacent detection points in the rectangular area is 10-20 mm, and there are no fewer than 5 detection points in each of the annular and fan-shaped areas.

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