Method for removing coating layer on surface of fault part in lossless mode

Abstract

The invention relates to the field of failure analysis, in particular to a method for losslessly removing a coating layer on the surface of a faulty part, which comprises the following specific steps: S1, preparing materials; s2, preparing a curing rubber mold; s3, surface stains are removed; s4, measuring the size of the fault part by using a measuring scale; s5, preparing a high-viscosity curing resin solution; s6, wrapping the fault part; s7, cooling and taking out the fault part; s8, clamping is conducted; s9, separating; s10, taking out; s11, checking a finished product; the method is characterized in that a coating layer on the surface of a fault part is bonded by utilizing high viscosity of cured resin, and the method comprises the following steps: preparing the high-viscosity cured resin, placing the fault part in a designed cured rubber mold, integrally wrapping the fault part by using a wrapping agent, and taking out the fault part by using a mechanical means after the wrapping agent is completely cured. And the coating layer is peeled off from the surface of the metal fault part through the high viscosity of the T-shaped solid resin.

Description

Technical Field

[0001] The invention relates to the field of failure analysis, in particular to a method for non-destructively removing a coating layer on the surface of a faulty component. Background Art

[0002] When performing failure analysis on faulty parts with coatings, it is necessary to observe and analyze the failure behavior of the substrate under the coating, so the surface coating needs to be removed. There are currently two commonly used methods for removing coatings. One is to grind off the coating by lossy mechanical means, but this will cause damage to the substrate surface under the coating, interfering with subsequent failure analysis work; the other is to use chemical solvents to dissolve the coating on the surface of the faulty part, but this will cause new problems. First, the dissolution time is long, affecting the timeliness of the failure analysis work; second, different solvents are required for different coatings, and the method is complicated and time-consuming; third, for a certain type of special substrate material, the solvent may also damage its surface, which is not conducive to the subsequent work.

[0003] Therefore, there is an urgent need to design a method that can quickly and non-destructively remove the coating layer on the surface of the faulty part without causing damage to the surface of the substrate material under the coating layer. Summary of the invention

[0004] In order to solve the above problem, the present invention proposes a method for non-destructively removing the coating layer on the surface of a faulty component.

[0005] A method for non-destructively removing a coating layer on a surface of a faulty component, the specific steps of which are as follows:

[0006] S1. Preparation: Prepare 5 silica gel bodies of different sizes, all in the shape of cuboids;

[0007] S2. Preparing a curing rubber mold: using a cutting tool to cut T-shaped grooves of different sizes on the surfaces of five silicone bodies to obtain curing rubber molds of different sizes;

[0008] S3. Remove surface stains: Place the faulty part in a beaker of appropriate size, add an appropriate amount of alcohol, immerse the faulty part completely in the alcohol, clean it ultrasonically and blow it dry to remove contaminants on the surface of the faulty part;

[0009] S4. Use a ruler to measure the size of the faulty part: select a curing rubber mold of appropriate specifications according to the size of the faulty part, and place the faulty part in the silicone mold sample chamber;

[0010] S5. Prepare high viscosity curing resin solution:

[0011] a. Open the fume hood, prepare a high-viscosity curing resin solution in the fume hood, take a glass beaker with a size, and pour a certain volume of epoxy resin into it;

[0012] b. Take another glass beaker with a size and pour a certain volume of curing agent into it. The volume ratio of epoxy resin to curing agent is 2:1.

[0013] c. Slowly pour the taken out curing agent into the epoxy resin, stir with a glass rod while pouring, and stir thoroughly for 1 minute;

[0014] S6. Wrap the faulty part: Slowly pour the evenly mixed high-viscosity curing resin into the T-shaped groove of the curing rubber mold until the resin solution completely wraps the faulty part to form a T-shaped solid resin, and use a rubber-tipped dropper to absorb the bubbles in the solution;

[0015] S7, cooling and removing the faulty parts;

[0016] S8. Clamping: Use a bench vise to clamp the T-shaped solid resin wrapped with the faulty part on the bench vise, clamp it on the outer wall of the T-shaped solid resin, and gently rotate the bench vise to clamp the T-shaped solid resin;

[0017] S9, separation: Use a claw hammer to gently tap the junction of the T-shaped solid resin block 1 and the T-shaped solid resin block 2, so that the T-shaped solid resin block 1 and the T-shaped solid resin block 2 are separated from each other;

[0018] S10, taking out: put a layer of plastic bag on the surface of the T-shaped solid resin, then clamp it on a bench vise, use a claw hammer to hit the surface of the T-shaped solid resin to make it crack along the junction of the T-shaped solid resin and the faulty part C, and take the faulty part out of the T-shaped solid resin after it is completely broken;

[0019] S11. Finished product inspection: Check whether the coating layer has been completely peeled off from the surface of the faulty component substrate. If not, repeat the above steps until the coating layer is completely peeled off.

[0020] The beneficial effects of the present invention are as follows: the present invention utilizes the high viscosity of the curing resin to bond the coating layer on the surface of the faulty part, including the prepared high-viscosity curing resin, placing the faulty part in a designed curing rubber mold, and using a coating agent to wrap the entire faulty part. After the coating agent is completely cured, the faulty part is taken out by mechanical means, and the coating layer is peeled off from the surface of the metal faulty part by the high viscosity of the T-shaped solid resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the rubber mold of the present invention;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the resin wrapping the faulty part of the present invention;

[0024] Figure numerals: A1, curing rubber mold; A2, T-slot; A3, sample chamber; B1, T-shaped solid resin; B2, T-shaped solid resin block one; B3, T-shaped solid resin block two; C, faulty part. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below.

[0026] like Figure 1 and Figure 2 As shown, a method for non-destructively removing the coating layer on the surface of a faulty part, the specific steps are as follows:

[0027] S1. Preparation: Prepare 5 silica gel bodies of different sizes, all in the shape of cuboids;

[0028] S2, preparing a cured rubber mold A1: using a cutting tool to cut T-shaped grooves A2 of different sizes on the surfaces of five silicone bodies to obtain cured rubber molds A1 of different sizes;

[0029] S3. Remove surface stains: Put the faulty part C into a beaker of appropriate size, pour in an appropriate amount of alcohol, immerse the faulty part C completely in the alcohol, clean it ultrasonically and then blow it dry to remove the contaminants on the surface of the faulty part C;

[0030] S4. Use a ruler to measure the size of the faulty part C: select a curing rubber mold A1 of appropriate specifications according to the size of the faulty part C, and place the faulty part C in the silicone mold sample compartment A3;

[0031] S5. Prepare high viscosity curing resin solution:

[0032] a. Open the fume hood, prepare a high-viscosity curing resin solution in the fume hood, take a glass beaker with a size, and pour a certain volume of epoxy resin into it;

[0033] b. Take another glass beaker with a size and pour a certain volume of curing agent into it. The volume ratio of epoxy resin to curing agent is 2:1.

[0034] c. Slowly pour the taken out curing agent into the epoxy resin, stir with a glass rod while pouring, and stir thoroughly for 1 minute;

[0035] S6. Wrapping the faulty part C: Slowly pour the evenly mixed high-viscosity curing resin into the T-shaped groove A2 of the curing rubber mold until the resin solution completely wraps the faulty part C to form a T-shaped solid resin B1, and use a rubber-tipped dropper to absorb the bubbles in the solution;

[0036] S7, cooling and removing the faulty part C;

[0037] S8. Clamping: Use a bench vise to clamp the T-shaped solid resin B1 wrapped with the faulty part C on the bench vise, clamp it on the outer wall of the T-shaped solid resin B1, and gently rotate the bench vise to clamp the T-shaped solid resin B1;

[0038] S9, separation: Use a claw hammer to gently tap the junction of the T-shaped solid resin block B2 and the T-shaped solid resin block B3, so that the T-shaped solid resin block B2 and the T-shaped solid resin block B3 are separated from each other;

[0039] S10, taking out: put a layer of plastic bag on the surface of the T-shaped solid resin B1, then clamp it on a bench vise, use a claw hammer to hit the surface of the T-shaped solid resin B1 to make it crack along the junction of the T-shaped solid resin B1 and the faulty part C, and take out the faulty part C from the T-shaped solid resin B1 after it is completely broken;

[0040] S11. Finished product inspection: Check whether the coating layer has been completely peeled off from the surface of the substrate of the faulty part C. If not, repeat the above steps until the coating layer is completely peeled off.

[0041] The sizes of the five silica gel bodies in step S1 are 30mm*30mm*30mm, 40mm*30mm*30mm, 50mm*30mm*30mm, 60mm*30mm*30mm, and 70mm*30mm*30mm.

[0042] Utilizing the high viscosity of the curing resin B2, the coating layer on the surface of the faulty part C is bonded down, including the prepared high-viscosity curing resin. The faulty part C is placed in the designed curing rubber mold A1, and the faulty part C is wrapped as a whole with a coating agent. After the coating agent is completely cured, the faulty part C is taken out by mechanical means, and the coating layer is peeled off from the surface of the metal faulty part C through the high viscosity of the T-shaped solid resin B1.

[0043] The size of the T-shaped groove in step S2 is determined according to the size of the silicone body used and is purchased according to actual needs.

[0044] In step S3, the beaker is placed in an ultrasonic cleaning machine, ultrasonically cleaned for 30 minutes, then taken out and blown dry with a hair dryer.

[0045] In the step S4, the faulty component C is placed parallel to the middle of the silicone mold sample chamber A3, and the faulty component C is not in contact with the edges of the silicone mold sample chamber A3.

[0046] After the step S7 is placed in the fume hood for 4 hours, when the resin solution is completely cured into a solid, the T-shaped solid resin B1 wrapped with the faulty part C is taken out from the cured rubber mold A1, which effectively solves the problems of the conventional method of removing the coating layer, such as long time consumption, complicated operation, and surface damage of the base material, and has a good application prospect and significant economic benefits.

[0047] The T-shaped solid resin B1 in step S9 includes a T-shaped solid resin block B2 and a T-shaped solid resin block B3 having different shapes.

[0048] The T-shaped solid resin block B2 and the T-shaped solid resin block B3 are cubes and cuboids respectively, and the faulty part C is arranged between the T-shaped solid resin block B2 and the T-shaped solid resin block B3. The two different shapes facilitate the detachment of the faulty part C.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for non-destructively removing a coating layer on the surface of a faulty component, characterized in that: The specific steps are as follows: S1. Preparation: Prepare 5 silica gel bodies of different sizes, all in the shape of cuboids; S2, preparing a curing rubber mold (A1): using a cutting tool to cut T-shaped grooves (A2) of different sizes on the surfaces of 5 silicone bodies to obtain curing rubber molds (A1) of different sizes; S3. Remove surface stains: Place the faulty part (C) in a beaker of suitable size, add an appropriate amount of alcohol, immerse the faulty part (C) completely in the alcohol, clean it by ultrasonic cleaning, and then blow dry it to remove contaminants on the surface of the faulty part (C); S4. Use a ruler to measure the size of the faulty part (C): select a curing rubber mold (A1) of appropriate specifications according to the size of the faulty part (C), and place the faulty part (C) in the sample chamber (A3) of the silicone mold; S5. Prepare high viscosity curing resin solution: a. Open the fume hood, prepare a high-viscosity curing resin solution in the fume hood, take a glass beaker with a size, and pour a certain volume of epoxy resin into it; b. Take another glass beaker with a size and pour a certain volume of curing agent into it. The volume ratio of epoxy resin to curing agent is 2:

1. c. Slowly pour the taken out curing agent into the epoxy resin, stir with a glass rod while pouring, and stir thoroughly for 1 minute; S6. Wrap the faulty part (C): Slowly pour the evenly mixed high-viscosity curing resin into the T-shaped groove (A2) of the curing rubber mold until the resin solution completely wraps the faulty part (C) to form a T-shaped solid resin (B1), and use a rubber-tipped dropper to absorb the bubbles in the solution; S7, cool down and remove the faulty part (C); S8. Clamping: Use a bench vise to clamp the T-shaped solid resin (B1) wrapped with the faulty part (C) on the bench vise, clamp it on the outer wall of the T-shaped solid resin (B1), and gently rotate the bench vise to clamp the T-shaped solid resin (B1); S9, separation: Use a claw hammer to gently tap the junction of the T-shaped solid resin block 1 (B2) and the T-shaped solid resin block 2 (B3), so that the T-shaped solid resin block 1 (B2) and the T-shaped solid resin block 2 (B3) are separated from each other; S10, taking out: put a layer of plastic bag on the surface of the T-shaped solid resin (B1), then clamp it on a bench vise, use a claw hammer to hit the surface of the T-shaped solid resin (B1) to make it crack along the junction of the T-shaped solid resin (B1) and the faulty part (C), and take the faulty part (C) out of the T-shaped solid resin (B1) after it is completely broken; S11. Finished product inspection: Check whether the coating layer has been completely peeled off from the surface of the faulty part (C). If not, repeat the above steps until the coating layer is completely peeled off.

2. A method for non-destructively removing a coating layer on a surface of a faulty component according to claim 1, characterized in that: The sizes of the five silica gel bodies in step S1 are 30mm*30mm*30mm, 40mm*30mm*30mm, 50mm*30mm*30mm, 60mm*30mm*30mm, and 70mm*30mm*30mm.

3. The method for non-destructively removing a coating layer on a surface of a faulty component according to claim 1, characterized in that: The size of the T-shaped groove in step S2 is determined according to the size of the silicone body used.

4. The method for non-destructively removing a coating layer on a surface of a faulty component according to claim 1, characterized in that: In step S3, the beaker is placed in an ultrasonic cleaning machine, ultrasonically cleaned for 30 minutes, then taken out and blown dry with a hair dryer.

5. The method for non-destructively removing a coating layer on a surface of a faulty component according to claim 1, characterized in that: In the step S4, the faulty part (C) is placed parallel to the middle of the sample chamber (A3) of the silicone mold, and the four sides thereof are not in contact with the edges of the sample chamber (A3) of the silicone mold.

6. The method for non-destructively removing a coating layer on a surface of a faulty component according to claim 1, characterized in that: In step S7, after being placed in the fume hood for 4 hours, when the resin solution is completely solidified into a solid, the T-shaped solid resin (B1) wrapped with the faulty part (C) is taken out from the curing rubber mold (A1).

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