A paint stripping aid and an electrophoretic film thickness measurement method

Abstract

The application discloses a paint removal auxiliary device and an electrophoretic film thickness measuring method. The paint removal auxiliary device comprises an outer cup body, a through hole is arranged at the bottom of the outer cup body, and a magnetic assembly is sleeved at the cup opening of the outer cup body; an inner cup body, a communicating pipe is arranged at the bottom of the inner cup body, and a sealing gasket is sleeved at the cup opening of the inner cup body; the inner cup body is embedded in the inner part of the outer cup body, and the pipe opening of the communicating pipe penetrates through the through hole; an elastic connecting piece is fixed at one end of the inner wall of the bottom of the outer cup body and at the other end of the outer wall of the bottom of the inner cup body; wherein the inner cup body and the outer cup body can move relatively under the constraint of the elastic connecting piece, and when the elastic connecting piece is in a normal state, the cup opening of the inner cup body penetrates through the cup opening of the outer cup body. The paint removal auxiliary device can quickly and accurately remove the electrophoretic film on the surface of the measured object. The electrophoretic film thickness measuring method based on the paint removal auxiliary device avoids the influence of the phosphating layer and the galvanized layer on the electrophoretic film thickness measurement, improves the accuracy of the electrophoretic film thickness measurement of the automobile body, and can be widely applied in the field of automobile production technology.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile production, and in particular to a paint stripping auxiliary device and an electrophoresis film thickness measurement method. BACKGROUND

[0002] At present, in most automobile enterprises, the automobile skin still uses galvanized mild steel material, and the surface thereof is subjected to phosphating, electrophoresis, primer, color paint, topcoat and other surface conversion film processes and coating processes to improve the corrosion resistance of the mild steel skin and to make the skin obtain the aesthetic appearance of color. Generally, the functions of the electrophoresis layer mainly include two aspects, one is to improve the adhesion between the paint film and the steel plate, and the other is the most basic function: corrosion resistance. As the coating layer closely attached to the steel plate, the rust prevention capability of the electrophoresis layer is the most basic but also the most important in the coating rust prevention function. If the electrophoresis coating quality is poor, the outer layer of the automobile paint is prone to bubbling or peeling, which leads to corrosion of the inner layer of the steel plate and perforation, thereby affecting the driving safety and the aesthetic appearance. Therefore, the electrophoresis film thickness is a more important index for measuring the electrophoresis quality, and is the first to be checked among various inspection items of electrophoresis, and is a must-check item.

[0003] In the prior art, the electrophoresis film thickness inspection generally adopts the cross-section method or the direct measurement method of the film thickness gauge. In fact, there is a phosphating layer with a thickness of 3-5 μm between the electrophoresis layer and the steel plate, and the general automobile skin part requires the electrophoresis film thickness to reach 15-25 μm. The traditional cross-section measurement method and the direct measurement method of the film thickness gauge will count the phosphating layer into the thickness of the electrophoresis layer, thereby leading to that the actual thickness of the electrophoresis layer does not meet the standard requirement. In addition, the electrophoresis film thickness of the large-area article after forming is not uniform, some areas are thick and some areas are thin. The cross-section method needs to rely on experience to judge the sampling position, and the adjustment of the electrophoresis process parameters needs higher measurement accuracy, so multiple sampling is required on the part, the sampling and sample preparation process is multiple, and the efficiency is low. Although the film thickness gauge can quickly read the film thickness and can also measure multiple points, the reading includes the thickness of the galvanized layer and the phosphating layer, and the influence of the galvanized layer and the phosphating layer on the film thickness cannot be removed, thereby leading to inaccurate measurement results. SUMMARY

[0004] In order to solve the above technical problems, the purpose of the present application is to provide a paint stripping auxiliary device and an electrophoresis film thickness measurement method, so as to improve the accuracy of the electrophoresis film thickness measurement of the automobile body.

[0005] The first technical solution adopted by the present application is:

[0006] A paint stripping auxiliary device comprises:

[0007] An outer cup body is provided with a through hole at the bottom thereof, and a magnetic assembly is sleeved at the cup opening of the outer cup body;

[0008] An inner cup body, a cup bottom of the inner cup body is provided with a communicating pipe, a cup opening of the inner cup body is provided with a sealing gasket, the inner cup body is embedded in the outer cup body, and a pipe opening of the communicating pipe penetrates through the through hole;

[0009] An elastic connecting piece, one end of the elastic connecting piece is fixed to an inner wall of a cup bottom of the outer cup body, and the other end of the elastic connecting piece is fixed to an outer wall of a cup bottom of the inner cup body;

[0010] Wherein, the inner cup body and the outer cup body can relatively move under the constraint of the elastic connecting piece, and when the elastic connecting piece is in a normal state, the cup opening of the inner cup body penetrates through the cup opening of the outer cup body.

[0011] Further, the magnetic assembly is a ring-shaped strong magnet, the ring-shaped strong magnet is nested at the cup opening of the outer cup body, and is fixedly connected with the outer cup body through a fixing bolt.

[0012] Further, the paint stripping auxiliary device further comprises a limiting assembly, the limiting assembly is arranged in the inner part of the outer cup body and is located between the outer cup body and the inner cup body.

[0013] Further, the outer cup body, the inner cup body and the sealing gasket are all made of corrosion-resistant materials.

[0014] The second technical scheme adopted by the present application is:

[0015] A method for measuring the thickness of an electrophoretic film, which is used for the paint stripping auxiliary device and comprises the following steps:

[0016] The surface of the object to be measured is divided into regions to determine a plurality of measurement regions;

[0017] The reference points of each measurement region are determined, and a plurality of measurement points are determined in the corresponding measurement region according to the reference points;

[0018] The paint stripping auxiliary device is adsorbed at the reference point close to the cup opening of the outer cup body, and the neutral paint stripping agent is poured into the inner cup body through the communicating pipe;

[0019] The brush is extended into the communicating pipe, and the brush is used to completely strip the electrophoretic film at the reference point;

[0020] The neutral paint stripping agent in the inner cup body is pumped away, the paint stripping auxiliary device is removed, and the reference point is cleaned to expose the phosphating layer;

[0021] The film thickness measuring instrument is used for zero correction at the reference point, so that the measurement value of the film thickness measuring instrument at the reference point is 0;

[0022] The film thickness measuring instrument is used to measure the film thickness of each measuring point corresponding to the reference point, and the film thickness measurement value of each measuring point is obtained.

[0023] Further, the step of determining the reference point of each measuring area and determining a plurality of measuring points in the corresponding measuring area according to the reference point specifically comprises:

[0024] The area center of each measuring area is taken as the corresponding reference point;

[0025] A plurality of measuring points are selected in the measuring area according to the reference point and a preset interval.

[0026] Further, the step of adsorbing one end of the paint stripping auxiliary device close to the cup mouth of the outer cup body at the reference point specifically comprises:

[0027] A cross-shaped scratch area is formed by using a preset cutter to scratch the electrophoretic film on the surface at the reference point;

[0028] The one end of the paint stripping auxiliary device close to the cup mouth of the outer cup body is in contact with the reference point, and is adsorbed at the reference point by the magnetic assembly, so that the cross-shaped scratch area is located in the cup mouth of the inner cup body.

[0029] Further, before the step of pouring the neutral paint stripping agent into the inner cup body through the communication pipe, there is also a step of checking the sealing, which specifically comprises:

[0030] Water is injected into the inner cup body through the communication pipe and waits for a preset time;

[0031] It is determined that the paint stripping auxiliary device does not leak water, the water in the inner cup body is pumped away by the rubber dropper, and the water in the inner cup body is sucked dry by inserting the absorbent cotton into the communication pipe.

[0032] Further, the step of pumping away the neutral paint stripping agent in the inner cup body, removing the paint stripping auxiliary device, and cleaning the reference point to expose the phosphating layer specifically comprises:

[0033] The electrophoretic film peeled off in the inner cup body is taken out by tweezers or the brush;

[0034] The neutral paint stripping agent in the inner cup body is pumped away by the rubber dropper, and the neutral paint stripping agent in the inner cup body is sucked dry by inserting the absorbent cotton into the communication pipe after taking out;

[0035] The paint stripping auxiliary device is removed, and the reference point after paint stripping is cleaned by soft cloth to expose the phosphating layer.

[0036] Further, the electrophoretic film thickness measurement method further comprises the following steps:

[0037] Calculate the average value of the film thickness measurement values of all measurement points in the same measurement area, and take the average value as the electrophoretic film thickness value of the corresponding measurement area.

[0038] The beneficial effects of the present application are: the present application provides a paint removal auxiliary device and an electrophoretic film thickness measurement method, the paint removal auxiliary device comprises an outer cup body, an inner cup body embedded in the inner part of the outer cup body, and an elastic connecting piece connecting the inner wall of the cup bottom of the outer cup body and the outer wall of the cup bottom of the inner cup body, when measuring the electrophoretic film thickness, the paint removal auxiliary device is adsorbed at the reference point on the surface of the measured object, the neutral paint remover is poured into the inner cup body through the connecting pipe passing through the through hole of the cup bottom of the outer cup body, so that the electrophoretic film at the reference point is separated and the phosphating layer is exposed, then the zero point of the film thickness measuring instrument is corrected at the reference point, so that the electrophoretic film thickness of the measurement points around the reference point can be measured by using the film thickness measuring instrument after zero point correction. The paint removal auxiliary device of the present application embodiment can quickly and accurately remove the electrophoretic film of the target area on the surface of the measured object, and the electrophoretic film thickness measurement method based on the paint removal auxiliary device avoids the influence of the phosphating layer and the galvanized layer on the electrophoretic film thickness measurement, and improves the accuracy of the electrophoretic film thickness measurement of the automobile body. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A perspective view of a paint removal auxiliary device provided by the present application embodiment;

[0040] Figure 2 A sectional view of a paint removal auxiliary device provided by the present application embodiment;

[0041] Figure 3 A step flowchart of an electrophoretic film thickness measurement method provided by the present application embodiment.

[0042] REFERENCE NUMERALS:

[0043] 10, outer cup body; 11, through hole; 12, magnetic assembly; 20, inner cup body; 21, connecting pipe; 22, sealing gasket; 30, elastic connecting piece; 40, fixing bolt; 50, limiting assembly; 60, surface of measured object. DETAILED DESCRIPTION

[0044] The present application will be further described in detail below in combination with the drawings and specific embodiments. For the step numbers in the following embodiments, they are only set for the convenience of description, and the order between the steps is not limited in any way, and the execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0045] In the description of the present application, the meaning of plurality is two or more, if there is a description of the first, second is only for the purpose of distinguishing technical features, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of the indicated technical features. In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0046] Referring to Figure 1 and 2 The embodiments of the present application provide a paint stripping auxiliary device, comprising:

[0047] The outer cup body 10 is provided with a through hole 11 at the bottom, and a magnetic assembly 12 is sleeved at the cup opening of the outer cup body 10;

[0048] The inner cup body 20 is provided with a communication pipe 21 at the bottom, and a sealing gasket 22 is sleeved at the cup opening of the inner cup body 20. The inner cup body 20 is embedded in the inner part of the outer cup body 10, and the pipe opening of the communication pipe 21 penetrates through the through hole 11;

[0049] The elastic connecting piece 30 is fixed at one end to the inner wall of the bottom of the outer cup body 10, and at the other end to the outer wall of the bottom of the inner cup body 20;

[0050] Wherein, the inner cup body 20 and the outer cup body 10 can move relatively under the constraint of the elastic connecting piece 30, and when the elastic connecting piece 30 is in normal state, the cup opening of the inner cup body 20 penetrates through the cup opening of the outer cup body 10.

[0051] Specifically, the paint stripping auxiliary device of the embodiment of the present application is used for adsorbing on the surface 60 of the object to be measured and assisting in stripping the target area located in the cup opening of the inner cup 20. Since the elastic connecting member 30 (such as a spring) is in a normal state, the cup opening of the inner cup 20 penetrates the cup opening of the outer cup 10, so that when the magnetic assembly 12 is adsorbed on the surface (reference point surface) of the object to be measured, the outer cup 10 is fixed, and the inner cup 20 is compressed by the elastic connecting member 30 under the action of the force of the surface of the object to be measured, and the elastic connecting member 30 generates a rebound force to tightly press the cup opening of the inner cup 20 on the surface of the object to be measured. A sealing gasket 22 resistant to neutral paint stripper corrosion is sleeved at the cup opening of the inner cup 20. The sealing gasket 22 can be a soft rubber gasket, which can be tightly attached to the surface of the object to be measured under the rebound force of the elastic connecting member 30, so as to prevent the paint stripper in the inner cup 20 from leaking and avoid the paint stripper acting on other areas outside the reference point. When stripping, the paint stripper is poured into the inner cup 20 from the communication pipe 21 extending through the through hole 11 of the cup bottom of the outer cup 10, and after the target area is stripped, the paint stripper is extracted by using a tool such as a rubber-tipped dropper or a syringe, the auxiliary paint stripping device is removed, and the reference point surface is wiped clean, so that the film thickness gauge can be zero-point calibrated for subsequent measurement.

[0052] It should be noted that, Figure 1 and Figure 2 The outer cup 10 and the inner cup 20 in Figure 1 and 2 are inverted, so that the cup bottom part is located above Figure 1 and Figure 2 , and the opening part is located below

[0053] Referring to Figure 1 and 2 , further as an optional embodiment, the magnetic assembly 12 is a ring-shaped strong magnet, which is nested at the cup opening of the outer cup 10 and is fixedly connected with the outer cup 10 through the fixing bolt 40.

[0054] Specifically, the magnetic assembly 12 adopts a ring-shaped strong magnet or an electromagnet, which is arranged around the cup opening of the outer cup 10 and is fixed through the fixing bolt 40, so that when the magnetic assembly 12 is adsorbed on the surface of the object to be measured, the outer cup 10 can be fixed on the object to be measured.

[0055] Referring to Figure 2 , further as an optional embodiment, the paint stripping auxiliary device further comprises a limiting assembly 50, which is arranged inside the outer cup 10 and between the outer cup 10 and the inner cup 20.

[0056] Specifically, the limiting assembly 50 is used to limit the inner cup body 20, avoiding large lateral displacement of the inner cup body 20 in the outer cup body 10 to cause the stripping agent to leak. The limiting assembly 50 can adopt a hard material with low elasticity and smooth surface.

[0057] Further as an optional embodiment, the outer cup body 10, the inner cup body 20 and the sealing gasket 22 are all made of corrosion-resistant materials.

[0058] Specifically, the outer cup body 10 and the inner cup body 20 can be made of stainless steel resistant to neutral stripping agent corrosion, or can be made of other transparent or non-transparent materials resistant to neutral stripping agent; the sealing gasket 22 is made of soft rubber material resistant to neutral organic stripping agent corrosion, and under the magnetic attraction pressure, the sealing property of the inner cavity and the surface of the reference point can be kept good, so that the stripping agent is prevented from leaking and the electrophoretic film of other measurement points is prevented from being stripped.

[0059] The above describes the mechanical structure and working principle of the stripping auxiliary device of the embodiment of the present application, and the following further describes an electrophoretic film thickness measurement method based on the stripping auxiliary device.

[0060] With reference to Figure 3 The embodiment of the present application provides an electrophoretic film thickness measurement method, which is used to realize the above stripping auxiliary device and comprises the following steps.

[0061] S101, the surface of a measured object is divided into regions to determine a plurality of measurement regions;

[0062] S102, reference points of the measurement regions are determined, and a plurality of measurement points are determined in the corresponding measurement regions according to the reference points;

[0063] S103, the stripping auxiliary device is adsorbed at one end of the cup opening of the outer cup body at the reference point, and the neutral stripping agent is poured into the inner cup body through the communication pipe;

[0064] S104, the brush is extended into the communication pipe, and the brush is used to completely strip the electrophoretic film at the reference point;

[0065] S105, the neutral stripping agent in the inner cup body is drawn away, the stripping auxiliary device is removed, and the reference point is cleaned to expose the phosphating layer;

[0066] S106, the film thickness measurement instrument is used to perform zero-point correction at the reference point, so that the measurement value of the film thickness measurement instrument at the reference point is 0;

[0067] S107, the film thickness measurement instrument is used to perform film thickness measurement at each measurement point corresponding to the reference point to obtain the film thickness measurement value of each measurement point.

[0068] Specifically, the surface of the object to be measured is divided into regions, preferably each molding surface is classified into a measurement region, if the area of a certain molding surface is large, it can also be divided into more than two measurement regions; at least one point in each measurement region is selected as a reference point, and the center of the region can be selected as the reference point of the corresponding measurement region; according to the reference point, the position of the measurement point in the divided region is set, and the measurement points are selected at intervals of 100mm, the measurement points are marked, and the positions of the measurement points are recorded; the paint stripping auxiliary device is adsorbed on the surface of the reference point, and a neutral paint stripper (the neutral paint stripper only reacts with the electrophoretic paint film, does not react with the phosphating layer and galvanized layer on the surface of the steel plate, so that the phosphating layer and galvanized layer can be left intact on the surface of the steel plate) is injected, and after a period of time, the electrophoretic film is completely stripped by using a brush after the electrophoretic film of the reference point is bubbled, the neutral paint stripper is removed, the paint stripping auxiliary device is removed, the surface of the reference point is cleaned, the phosphating layer is exposed, and the reference point is dried; the film thickness measuring instrument is used to perform zero correction on the surface of the reference point where the phosphating layer is exposed, so that the film thickness measuring instrument does not include the thickness of the phosphating layer and the galvanized layer when measuring the film thickness at the measurement point subsequently; after the zero correction is completed, the film thickness measuring instrument is used to measure the film thickness of the measurement point marked previously.

[0069] Further as an optional implementation, the step S102 of determining the reference points of each measurement region and determining a plurality of measurement points in the corresponding measurement region according to the reference points specifically includes:

[0070] S1021, taking the center of each measurement region as the corresponding reference point;

[0071] S1022, selecting a plurality of measurement points in the measurement region according to the reference points and a preset interval.

[0072] Specifically, the large-area object part is divided into regions according to the molding surface or the area size, and a reference point is selected in each region as a film thickness gauge zero correction point, so as to eliminate the influence of the galvanized layer and the phosphating layer in the region as much as possible, and keep the measurement accuracy in the same region at the same level.

[0073] Further as an optional implementation, the step of adsorbing one end of the paint stripping auxiliary device close to the cup mouth of the outer cup body at the reference point specifically includes:

[0074] S1031, using a preset tool to cut the electrophoretic film on the surface at the reference point and form a cross-shaped scratch region;

[0075] S1032, contacting one end of the paint stripping auxiliary device close to the cup mouth of the outer cup body with the reference point, and adsorbing the paint stripping auxiliary device at the reference point through the magnetic assembly, so that the cross-shaped scratch region is located in the cup mouth of the inner cup body.

[0076] Specifically, a special knife for painting verification test is used to lightly draw a "cross" on the selected reference point of the electrophoretic film to promote the rapid removal of the paint remover. During the process of drawing the "cross", the blade and the sample surface should be kept perpendicular, and the knife mark should break the electrophoretic film to expose the steel plate substrate, but it should not be too forceful to make the knife mark too deep and cause the cut to roll over. The paint stripping auxiliary device is adsorbed on the surface of the "cross" mark at the reference point, and the position is adjusted so that the divided area is located in the cup opening of the inner cup body.

[0077] Further, as an optional embodiment, before the step of pouring the neutral paint remover into the inner cup body through the communication pipe, a sealing inspection step is further included, which specifically includes:

[0078] A1, injecting clean water into the inner cup body through the communication pipe and waiting for a predetermined time;

[0079] A2, determining that the paint stripping auxiliary device does not leak clean water, and then removing the clean water in the inner cup body through a rubber bulb dropper, and then removing the inner cup body after the clean water in the inner cup body is completely absorbed by the absorbent cotton.

[0080] Specifically, clean water is injected into the inner cup body, and after waiting for 1-5 minutes, the sealing property is inspected, and after confirming that the inner cavity does not leak water, the water is removed by a rubber bulb dropper, and the clean water is completely absorbed by the absorbent cotton or water-absorbing cotton before the inner cup body is removed.

[0081] Further, as an optional embodiment, the step S105 of removing the neutral paint remover in the inner cup body, removing the paint stripping auxiliary device, and cleaning the reference point to expose the phosphating layer specifically includes:

[0082] S1051, removing the electrophoretic film peeled off in the inner cup body by tweezers or a brush;

[0083] S1052, removing the neutral paint remover in the inner cup body by a rubber bulb dropper, and then removing the inner cup body after the neutral paint remover in the inner cup body is completely absorbed by the absorbent cotton.

[0084] S1053, removing the paint stripping auxiliary device, and cleaning the reference point stripped of paint by soft cloth to expose the phosphating layer.

[0085] Specifically, the neutral paint remover is injected into the inner cup body, and after waiting for 10-20 minutes, the electrophoretic film is lightly brushed by a brush after the electrophoretic film at the reference point is bubbled, so that the electrophoretic film is completely peeled off; the electrophoretic film peeled off in the inner cavity is picked out by tweezers or a brush, the neutral paint remover is removed by a rubber bulb dropper, and the inner cup body is removed after the neutral paint remover is completely absorbed by the absorbent cotton or water-absorbing cotton; the paint stripping auxiliary device is removed, and the reference point surface stripped of paint is cleaned by soft cloth to expose the phosphating layer.

[0086] Further, as an optional embodiment, the electrophoretic film thickness measurement method further includes the following steps:

[0087] The average of the film thickness measurement values of all measurement points in the same measurement area is calculated, and the average is taken as the electrophoretic film thickness value of the corresponding measurement area.

[0088] It can be understood that the present application provides a paint removal auxiliary device and an electrophoretic film thickness measurement method. The paint removal auxiliary device comprises an outer cup body, an inner cup body embedded in the inner part of the outer cup body, and an elastic connecting piece connecting the inner wall of the bottom of the outer cup body and the outer wall of the bottom of the inner cup body. When measuring the electrophoretic film thickness, the paint removal auxiliary device is adsorbed at the reference point on the surface of the measured object. The neutral paint remover is poured into the inner cup body through the connecting pipe passing through the through hole of the bottom of the outer cup body, so that the electrophoretic film at the reference point is separated from the phosphating layer. Then, the film thickness measuring instrument is used for zero point correction at the reference point. Thus, the electrophoretic film thickness of the measurement points around the reference point can be measured by using the film thickness measuring instrument after zero point correction. The paint removal auxiliary device of the present application can quickly and accurately remove the electrophoretic film of the target area on the surface of the measured object. The electrophoretic film thickness measurement method based on the paint removal auxiliary device avoids the influence of the phosphating layer and the galvanized layer on the electrophoretic film thickness measurement by zero point correction of the film thickness measuring instrument at the reference point after paint removal, thereby improving the accuracy of the electrophoretic film thickness measurement of the automobile body.

[0089] The above is only a preferred embodiment of the present application, and the present application is not limited to the above-described embodiments. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, as long as the same means achieve the technical effects of the present application, should be included in the protection scope of the present application. The technical solutions and / or embodiments within the protection scope of the present application can have various modifications and changes.

Claims

1. A paint stripping auxiliary device, characterized in that, include: The outer cup body has a through hole at the bottom and a magnetic component is fitted at the mouth of the outer cup body. The inner cup body has a connecting tube at its bottom and a sealing gasket at its mouth. The inner cup body is embedded inside the outer cup body, and the opening of the connecting tube protrudes through the through hole. An elastic connector, one end of which is fixed to the inner wall of the bottom of the outer cup body, and the other end of which is fixed to the outer wall of the bottom of the inner cup body; The inner cup and the outer cup can move relative to each other under the constraint of the elastic connector, and when the elastic connector is in its normal state, the cup opening of the inner cup protrudes through the cup opening of the outer cup.

2. The paint stripping auxiliary device according to claim 1, characterized in that: The magnetic component is a ring-shaped strong magnet, which is nested at the mouth of the outer cup and fixedly connected to the outer cup by fixing bolts.

3. The paint stripping auxiliary device according to claim 1, characterized in that: The paint stripping auxiliary device also includes a limiting component, which is disposed inside the outer cup body and located between the outer cup body and the inner cup body.

4. A paint stripping auxiliary device according to any one of claims 1 to 3, characterized in that: The outer cup body, the inner cup body, and the sealing gasket are all made of corrosion-resistant materials.

5. A method for measuring the thickness of an electrophoretic film, used by means of a paint stripping auxiliary device as described in any one of claims 1 to 4, characterized in that, Includes the following steps: The surface of the object to be measured is divided into regions to determine multiple measurement areas; Determine the reference point for each measurement area, and determine multiple measurement points within the corresponding measurement area based on the reference point; The end of the paint stripping auxiliary device near the mouth of the outer cup is attached to the reference point, and neutral paint stripper is poured into the inner cup through the connecting tube. Insert a brush into the connecting tube and use the brush to completely peel off the electrophoretic membrane at the reference point. Remove the neutral paint remover from the inner cup, remove the paint removal auxiliary device, and clean the reference point to expose the phosphate layer; Zero-point calibration is performed at the reference point using a film thickness measuring instrument, so that the measured value of the film thickness measuring instrument at the reference point is 0; The film thickness is measured at each of the measurement points corresponding to the reference point using the film thickness measuring instrument, and the film thickness measurement value of each measurement point is obtained.

6. The method for measuring the thickness of an electrophoretic membrane according to claim 5, characterized in that, The step of determining the reference point for each measurement area and determining multiple measurement points within the corresponding measurement area based on the reference point specifically includes: The center of each measurement area is taken as the corresponding reference point; Multiple measurement points are selected within the measurement area based on the reference point and the preset spacing.

7. The method for measuring the thickness of an electrophoretic membrane according to claim 5, characterized in that, The step of attaching one end of the paint stripping aid device near the mouth of the outer cup to the reference point specifically includes: At the reference point, a pre-set tool is used to cut open the electrophoretic membrane on the surface, forming a cross-shaped scratch area; The end of the paint stripping aid device near the mouth of the outer cup is brought into contact with the reference point, and is attracted to the reference point by a magnetic component, so that the cross-shaped scratch area is located inside the mouth of the inner cup.

8. The method for measuring the thickness of an electrophoretic membrane according to claim 5, characterized in that, Before the step of injecting neutral paint remover into the inner cup through the connecting tube, a step of checking the seal is also included, which specifically includes: Water is injected into the inner cup through the connecting tube and a preset time is waited. After confirming that no water has seeped out of the paint stripping auxiliary device, the water in the inner cup is removed using a dropper, and then degreased cotton is inserted through the connecting tube to absorb the water in the inner cup before it is removed.

9. The method for measuring the thickness of an electrophoretic membrane according to claim 5, characterized in that, The step of removing the neutral paint remover from the inner cup, removing the paint removal auxiliary device, and cleaning the reference point to expose the phosphating layer specifically includes: The electrophoretic membrane that has been peeled off inside the inner cup is removed using tweezers or the brush. The neutral paint remover in the inner cup is removed using a dropper, and then absorbs the neutral paint remover in the inner cup by inserting degreased cotton into the connecting tube before removing it. Remove the paint stripping aid and clean the base point where the paint was stripped using a soft cloth to expose the phosphate layer.

10. A method for measuring the thickness of an electrophoretic membrane according to any one of claims 5-9, characterized in that, The electrophoretic membrane thickness measurement method further includes the following steps: Calculate the average value of the membrane thickness measurements at all measurement points within the same measurement area, and use the average value as the electrophoretic membrane thickness value for the corresponding measurement area.

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