Coating binding force testing device

Abstract

The utility model provides a coating binding force testing device. The coating binding force testing device comprises a first pulling and connecting assembly, a second pulling and connecting assembly and an auxiliary mounting assembly, the first pulling and connecting assembly is provided with a first connecting end used for being in glue joint with one end of a test piece. And the second pulling assembly is provided with a second connecting end which is glued with the other end of the test piece. The auxiliary mounting assembly can detachably wrap the outer side wall of the first connecting end, the outer side wall of the test piece and the outer side wall of the second connecting end before the first connecting end, the test piece and the second connecting end are glued and fixed into a whole, so that the first connecting end, the test piece and the second connecting end are coaxial; the tensile force applied to the test piece is vertical to the end face of the test piece when the tensile force is subsequently applied to the test piece for coating binding force test, so that the accuracy of the coating binding force test is improved.

Description

Technical Field

[0001] This utility model relates to the field of coating mechanical property testing technology, and in particular to a coating adhesion testing device. Background Technology

[0002] The adhesion between the coating and the substrate is a key indicator of coating performance; stronger adhesion results in a less prone-to-peel coating and higher product reliability. Currently, various standard testing methods exist both domestically and internationally to evaluate coating adhesion, such as the cross-cut test, shear test, scratch test, and tensile test. Among these, the tensile test is a common and relatively simple method. However, existing tensile tests for coating adhesion involve gluing the sample to both ends of a tensile fixture and then applying tensile force until the sample breaks. However, existing tensile tests for coating adhesion often yield significant deviations in their results. Utility Model Content

[0003] Therefore, it is necessary to provide a coating adhesion testing device to address the problem of significant deviations in the test results of the tensile method for testing coating adhesion in existing technologies.

[0004] The technical solution is as follows:

[0005] On one hand, a coating adhesion testing device is provided, wherein a coating is sprayed onto both ends of a substrate to form a test specimen, the coating adhesion testing device comprising:

[0006] The first connection assembly is provided with a first connecting end for bonding to one end of the test piece;

[0007] The second connection assembly is provided with a second connecting end for bonding to the other end of the test piece;

[0008] An auxiliary installation component is configured to be detachably wrapped around the outer wall of the first connecting end, the outer wall of the test piece, and the outer wall of the second connecting end before the first connecting end, the test piece, and the second connecting end are glued and fixed together, such that the first connecting end, the test piece, and the second connecting end are coaxial.

[0009] In the coating adhesion testing device described in the above embodiments, during use, firstly, adhesive is applied to the end face of the second connecting end, and then the test piece is placed on the end face of the second connecting end. Secondly, adhesive is applied to the end face of the test piece away from the second connecting end, and then the first connecting end is moved to the end of the test piece away from the second connecting end. Then, before the adhesive cures (i.e. before the first connecting end, the test piece, and the second connecting end are glued and fixed together), the auxiliary mounting component is detachably wrapped around the outer wall of the first connecting end, the outer wall of the test piece, and the outer wall of the second connecting end, making the first connecting end, the test piece, and the second connecting end coaxial. Finally, the auxiliary mounting component is removed, and after the adhesive has completely cured, the first connecting end, the test piece, and the second connecting end are coaxially arranged and glued and fixed together, ensuring that when a tensile force is applied to the test piece for coating adhesion testing, the tensile force on the test piece is perpendicular to the end face of the test piece, thereby improving the accuracy of the coating adhesion test.

[0010] The technical solution will be further explained below:

[0011] In one embodiment, the auxiliary installation assembly includes a first clamp and a second clamp. The first clamp has a first groove penetrating through it on the side near the second clamp, and the second clamp has a second groove penetrating through it on the side near the first clamp. The first clamp and the second clamp are detachably connected, such that the first groove and the second groove can cooperate to form a limiting channel. The limiting channel has a first limiting segment, a second limiting segment, and a third limiting segment arranged coaxially. The first limiting segment is used to wrap the outer wall of the first connecting end, the second limiting segment is used to wrap the outer wall of the test piece, and the third limiting segment is used to wrap the outer wall of the second connecting end.

[0012] In one embodiment, the first connecting end, the test piece, and the second connecting end are all cylindrical, and the diameters of the first connecting end, the test piece, and the second connecting end are the same.

[0013] In one embodiment, the first clamp is provided with first fixing holes on both sides of the width direction of the first groove, and the second clamp is provided with second fixing holes on both sides of the width direction of the second groove, corresponding to the first fixing holes. The auxiliary installation component further includes first locking members. The number of first locking members, the number of first fixing holes, and the number of second fixing holes are all the same. Each first locking member passes through each first fixing hole and each second fixing hole, and locks the first clamp and the second clamp together as one unit.

[0014] In one embodiment, the first connection assembly includes a force tester and a first connector having the first connection end. The first connector has a third connection end coaxially arranged with the first connection end on the side away from the first connection end, and the third connection end is detachably connected to the force tester.

[0015] In one embodiment, the first connection end is configured to engage with the auxiliary mounting assembly along the axial direction of the first connection end when the auxiliary mounting assembly is wrapped around the outer wall of the first connection end.

[0016] In one embodiment, the sum of the length of the first connecting end along its own axial direction, the length of the test piece along its own axial direction, and the length of the second connecting end along its own axial direction is set as a first length, which is greater than the length of the auxiliary mounting assembly along the axial direction of the first connecting end.

[0017] In one embodiment, the second pull assembly includes a base and a second connector having a second connecting end. The second connector has a fourth connecting end coaxially arranged with the second connecting end on the side away from the second connecting end. The fourth connecting end is detachably connected to the base.

[0018] In one embodiment, the first pull-up assembly is spaced above the second connection end, and the second connector has one side of the second connection end for supporting the auxiliary installation assembly.

[0019] In one embodiment, the fourth connecting end is provided with a third fixing hole that penetrates the fourth connecting end radially, the base is provided with a plug-in hole on one side near the second connecting member, and the other side of the base is provided with a fourth fixing hole that penetrates the base and communicates with the plug-in hole. The second pull assembly also includes a second locking member, which is configured to pass through the third fixing hole and the fourth fixing hole when the fourth connecting end is plugged into the plug-in hole, and lock the fourth connecting end and the base together. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a coating adhesion testing device according to one embodiment.

[0023] Figure 2 for Figure 1 A cross-sectional view of the coating adhesion testing device along the AA direction.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Coating adhesion testing device; 100. First pull-joint assembly; 110. First connector; 111. First connecting end; 112. Third connecting end; 120. Force tester; 200. Second pull-joint assembly; 210. Second connector; 211. Second connecting end; 212. Fourth connecting end; 213. Third fixing hole; 220. Base; 221. Fourth fixing hole; 300. Auxiliary installation assembly; 310. First clamp; 311. First fixing hole; 320. Second clamp; 330. Limiting channel. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] In view of the large deviation in the test results of the coating adhesion test by the tensile method in the existing technology, the inventor conducted test analysis and found that: during the tensile test of coating adhesion strength, the sample and the tensile fixture cannot be guaranteed to be coaxial, and the tensile force applied to the sample is not perpendicular to the end face of the sample, which leads to the deviation of the test results.

[0028] The coating is sprayed onto both ends of the substrate to form a sample (i.e., a test piece).

[0029] Based on the above problems, the inventors designed and proposed the coating adhesion testing device 10 of the following embodiments of this application to solve the above technical problems.

[0030] like Figure 1 and Figure 2As shown, in one embodiment, a coating adhesion testing device 10 is provided, including a first bonding assembly 100, a second bonding assembly 200, and an auxiliary mounting assembly 300. The first bonding assembly 100 has a first connecting end 111 for bonding to one end of a test piece. The second bonding assembly 200 has a second connecting end 211 for bonding to the other end of the test piece. The auxiliary mounting assembly 300 is configured to be detachably wrapped around the outer wall of the first connecting end 111, the outer wall of the test piece, and the outer wall of the second connecting end 211 before the first connecting end 111, the test piece, and the second connecting end 211 are bonded and fixed together, such that the first connecting end 111, the test piece, and the second connecting end 211 are coaxial.

[0031] In the above embodiment, the coating adhesion testing device 10 is used as follows: First, adhesive is applied to the end face of the second connecting end 211, and then the test piece is placed on the end face of the second connecting end 211. Next, adhesive is applied to the end face of the test piece away from the second connecting end 211, and then the first connecting end 111 is moved to the end of the test piece away from the second connecting end 211. Then, before the adhesive cures (i.e. before the first connecting end 111, the test piece, and the second connecting end 211 are glued and fixed together), the auxiliary mounting component 300 is detachably wrapped around the outer wall of the first connecting end 111, the outer wall of the test piece, and the outer wall of the second connecting end 211, making the first connecting end 111, the test piece, and the second connecting end 211 coaxial. Finally, the auxiliary installation component 300 is removed. After the adhesive has fully cured, the first connecting end 111, the test piece, and the second connecting end 211 are coaxially arranged and glued together to ensure that when a tensile force is applied to the test piece for coating adhesion testing, the tensile force on the test piece is perpendicular to the end face of the test piece, thereby improving the accuracy of the coating adhesion test.

[0032] It should be noted that the coaxiality of the first connecting end 111, the test piece, and the second connecting end 211 means that the axis of the first connecting end 111, the axis of the test piece, and the axis of the second connecting end 211 coincide.

[0033] It should be noted that this embodiment is illustrated by taking the example of the first pull assembly 100 being spaced above the second pull assembly 200. In other embodiments, the second pull assembly 200 may also be spaced above the first pull assembly 100 (i.e., when it is necessary to test the adhesion of the coating, first apply glue to the end face of the first connecting end 111, and then place the test piece on the end face of the first connecting end 111). The working principle and workflow of the two embodiments are the same or similar, and will not be described in detail here.

[0034] It should be noted that if the second connecting end 211 and the test piece are already aligned coaxially when the test piece is placed on the end face of the second connecting end 211, then when installing the auxiliary mounting component 300, it is only necessary to ensure that the adhesive at the end of the test piece closest to the first connecting end 111 has not cured. If the second connecting end 211 and the test piece are not aligned coaxially when the test piece is placed on the end face of the second connecting end 211, then when installing the auxiliary mounting component 300, it is necessary to ensure that the adhesive at both ends of the test piece has not cured.

[0035] It should be noted that when installing the auxiliary installation component 300, the first connecting end 111 can be placed directly on the end face of the test piece away from the second connecting end 211, or it can be spaced apart from the end face of the test piece away from the second connecting end 211. Specifically, when installing the auxiliary installation component 300, if the first connecting end 111 is placed directly on the end face of the test piece away from the second connecting end 211, the first pull-connecting component 100 does not need to be moved after the auxiliary installation component 300 is installed. When installing the auxiliary installation component 300, if the first connecting end 111 is spaced apart from the end face of the test piece away from the second connecting end 211, the first pull-connecting component 100 needs to be lowered after the auxiliary installation component 300 is installed, so that the first connecting end 111 descends to the end face of the test piece away from the second connecting end 211 and is glued together.

[0036] In this specific embodiment, the coating can be a silicon carbide coating. In other embodiments, the coating can also be made of other materials.

[0037] The auxiliary installation component 300 can be configured as any structure in the prior art that enables coaxial alignment of multiple components.

[0038] like Figure 1 and Figure 2 As shown, the auxiliary installation assembly 300 further includes a first clamp 310 and a second clamp 320. The first clamp 310 has a first groove penetrating through it on the side near the second clamp 320. The second clamp 320 has a second groove penetrating through it on the side near the first clamp 310. The first clamp 310 and the second clamp 320 are detachably connected, allowing the first and second grooves to cooperate to form a limiting channel 330. The limiting channel 330 has a first limiting section, a second limiting section, and a third limiting section coaxially arranged. The first limiting section is used to wrap around the outer wall of the first connecting end 111, the second limiting section is used to wrap around the outer wall of the test piece, and the third limiting section is used to wrap around the outer wall of the second connecting end 211.

[0039] Optionally, the first connecting end 111, the test piece, and the second connecting end 211 are all cylindrical, and the diameters of the first connecting end 111, the test piece, and the second connecting end 211 are the same. Thus, the diameters of the first connecting end 111 and the second connecting end 211 are consistent with the diameter of the test piece. After placing the test piece on the end face of the second connecting end 211 and aligning it, the auxiliary mounting assembly 300 covers the outer walls of the first connecting end 111, the test piece, and the second connecting end 211, further ensuring alignment between the test piece and the first connecting end 111 and the second connecting end 211. This ensures that the tensile force applied to the test piece is perpendicular to the end face of the test piece and does not deviate, improving the accuracy of the coating adhesion test.

[0040] The first clamp 310 can be detachably connected to the second clamp 320 by snap-fit, plug-in, screw-in or other means.

[0041] like Figure 1 As shown, optionally, the first clamp 310 has first fixing holes 311 on both opposite sides along the width direction of the first groove. The second clamp 320 has second fixing holes corresponding to the first fixing holes 311 on both opposite sides along the width direction of the second groove. The auxiliary mounting assembly 300 also includes first locking members. The number of first locking members, the number of first fixing holes 311, and the number of second fixing holes are all the same. Each first locking member passes through each first fixing hole 311 and each second fixing hole, locking the first clamp 310 and the second clamp 320 together. This facilitates the installation and disassembly of the auxiliary mounting assembly 300 and improves the practicality of the coating adhesion testing device 10.

[0042] The number of the first locking element can be flexibly adjusted according to actual usage needs. Specifically, in this embodiment, the first locking element can be a bolt, and the number of bolts is two.

[0043] like Figure 1 and Figure 2 As shown, in one embodiment, the first bonding assembly 100 includes a force tester 120 and a first connector 110 having a first connecting end 111. A third connecting end 112, coaxially arranged with the first connecting end 111, is provided on the side of the first connector 110 away from the first connecting end 111. The third connecting end 112 is detachably connected to the force tester 120. Thus, the first connector 110 is detachable from the force tester 120, allowing for the cleaning of adhesive at the first connecting end 111 after testing. This enables the first connector 110 to be reused, improving the practicality of the coating adhesion testing device 10.

[0044] The first connector 110 can be configured as a connecting cylinder. The first connector 110 is integrally formed with the first connecting end 111 and the third connecting end 112. The third connecting end 112 can be detachably connected to the force tester 120 by screwing, snapping, or other means.

[0045] like Figure 1 and Figure 2 As shown, in one embodiment, the first connecting end 111 is configured to engage with the auxiliary mounting assembly 300 when it wraps around the outer wall of the first connecting end 111, allowing the auxiliary mounting assembly 300 to move axially along the first connecting end 111. Thus, when installing the auxiliary mounting assembly 300, the first connecting end 111 can initially maintain a distance from the test piece. After the auxiliary mounting assembly 300 correspondingly wraps around the outer wall of the first connecting end 111, the outer wall of the test piece, and the outer wall of the second connecting end 211, the first pulling assembly 100 is slowly lowered to the end face of the test piece furthest from the second connecting end 211. The first connecting end 111 aligns with the test piece and is bonded together with adhesive, thereby ensuring that the first connecting end 111, the test piece, and the second connecting end 211 are coaxial, improving the reliability of the coating adhesion testing device 10.

[0046] When installing the auxiliary installation component 300, the distance between the first connecting end 111 and the test piece can be flexibly adjusted according to actual usage needs. For example, when installing the auxiliary installation component 300, the distance between the first connecting end 111 and the test piece can be 0mm, 2mm, 5mm, 8mm, or 10mm, etc.

[0047] like Figure 1 As shown, optionally, the sum of the length of the first connecting end 111 along its own axial direction, the length of the test piece along its own axial direction, and the length of the second connecting end 211 along its own axial direction is set as a first length, which is greater than the length of the auxiliary mounting assembly 300 along the axial direction of the first connecting end 111. This ensures that the auxiliary mounting assembly 300 will not interfere with the first connecting end 111 during use, improving the reliability of the coating adhesion testing device 10.

[0048] like Figure 1 and Figure 2 As shown, in one embodiment, the second bonding assembly 200 includes a base 220 and a second connector 210 having a second connecting end 211. A fourth connecting end 212, coaxially arranged with the second connecting end 211, is provided on the side of the second connector 210 away from the second connecting end 211. The fourth connecting end 212 is detachably connected to the base 220. Thus, the second connector 210 is detachable from the base 220, allowing for the cleaning of adhesive at the second connecting end 211 after testing. This enables the second connector 210 to be reused, improving the practicality of the coating adhesion testing device 10.

[0049] like Figure 1 and Figure 2 As shown, optionally, the first pull-up assembly 100 is spaced above the second connecting end 211, and the second connector 210 has one side with the second connecting end 211 for supporting the auxiliary installation assembly 300. In this way, the second connector 210 can provide positioning support for the auxiliary installation assembly 300, so as to facilitate the installation of the auxiliary installation assembly 300.

[0050] In this specific embodiment, the diameter of the second connector 210 is larger than the diameter of the second connector 211.

[0051] The second connector 210 can be configured as a connecting cylinder. The second connector 210 is integrally formed with the second connecting end 211 and the fourth connecting end 212. The fourth connecting end 212 can be detachably connected to the base 220 by screwing, snapping, or other means.

[0052] like Figure 2 As shown, optionally, the fourth connecting end 212 is provided with a third fixing hole 213 that penetrates the fourth connecting end 212 radially. The base 220 is provided with a insertion hole on one side near the second connecting member 210, and a fourth fixing hole 221 that penetrates the base 220 and communicates with the insertion hole on the other side. The second pull assembly 200 also includes a second locking member, which is configured to pass through the third fixing hole 213 and the fourth fixing hole 221 when the fourth connecting end 212 is inserted into the insertion hole, and lock the fourth connecting end 212 and the base 220 together.

[0053] It should be noted that the detachable connection between the third connecting end 112 and the force tester 120 can be the same as the detachable connection between the fourth connecting end 212 and the base 220.

[0054] To facilitate a further understanding of the working principle of the coating adhesion testing device 10 in this application, the following will describe in detail one of the working processes of the coating adhesion testing device 10 as an example.

[0055] The third connecting end 112 is connected to the force tester 120 by bolts, and the fourth connecting end 212 is connected to the base 220 by bolts.

[0056] After applying the glue to the end face of the second connecting end 211, place the test piece on the end face of the second connecting end 211 and align it in the center.

[0057] Apply glue to the end face of the test piece away from the second snap-fit ​​end, and lower the first pull assembly 100 to directly above the test piece, with a gap of about 5mm between it and the test piece.

[0058] Before the adhesive cures, the test piece, the first connecting end 111 and the second connecting end 211 should be wrapped up as soon as possible using the first clamp 310 and the second clamp 320. The first clamp 310 and the second clamp 320 are connected and fixed together by matching screws and nuts.

[0059] Slowly lower the first pull assembly 100 to the end face of the test piece away from the second connection end 211, align the first connection end 111 with the test piece and glue them together;

[0060] Remove the first clamp 310 and the second clamp 320. After the adhesive has fully cured, apply a tensile force to the test piece to test the coating bonding strength.

[0061] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0062] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0064] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0066] It should also be understood that, in interpreting the connection or positional relationships of components, although not explicitly described, connection and positional relationships are interpreted to include a range of error, which should be within the acceptable deviation range of a specific value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A coating adhesion testing device, wherein a coating is sprayed onto both ends of a substrate to form a test specimen, characterized in that, The coating adhesion testing device includes: The first connection assembly is provided with a first connecting end for bonding to one end of the test piece; The second connection assembly is provided with a second connecting end for bonding to the other end of the test piece; An auxiliary installation component is configured to be detachably wrapped around the outer wall of the first connecting end, the outer wall of the test piece, and the outer wall of the second connecting end before the first connecting end, the test piece, and the second connecting end are glued and fixed together, such that the first connecting end, the test piece, and the second connecting end are coaxial.

2. The coating adhesion testing device according to claim 1, characterized in that, The auxiliary installation assembly includes a first clamp and a second clamp. The first clamp has a first groove penetrating through it on the side near the second clamp, and the second clamp has a second groove penetrating through it on the side near the first clamp. The first clamp and the second clamp are detachably connected, so that the first groove and the second groove can cooperate to form a limiting channel. The limiting channel has a first limiting segment, a second limiting segment, and a third limiting segment arranged coaxially. The first limiting segment is used to wrap the outer wall of the first connecting end, the second limiting segment is used to wrap the outer wall of the test piece, and the third limiting segment is used to wrap the outer wall of the second connecting end.

3. The coating adhesion testing device according to claim 2, characterized in that, The first connecting end, the test piece, and the second connecting end are all cylindrical, and the diameters of the first connecting end, the test piece, and the second connecting end are the same.

4. The coating adhesion testing device according to claim 2, characterized in that, The first clamp has a first fixing hole on each of the opposite sides along the width direction of the first groove, and the second clamp has a second fixing hole on each of the opposite sides along the width direction of the second groove, which corresponds to the first fixing hole. The auxiliary installation component also includes a first locking member. The number of the first locking members, the number of the first fixing holes, and the number of the second fixing holes are all the same. Each of the first locking members passes through each of the first fixing holes and each of the second fixing holes, and locks the first clamp and the second clamp together as one unit.

5. The coating adhesion testing device according to any one of claims 1 to 4, characterized in that, The first connection assembly includes a force tester and a first connector having the first connection end. The first connector has a third connection end coaxially arranged with the first connection end on the side away from the first connection end. The third connection end is detachably connected to the force tester.

6. The coating adhesion testing apparatus according to any one of claims 1 to 4, characterized in that, The first connection end is configured to engage with the auxiliary mounting assembly along the axial direction of the first connection end when the auxiliary mounting assembly is wrapped around the outer wall of the first connection end.

7. The coating adhesion testing device according to claim 6, characterized in that, The sum of the length of the first connecting end along its own axis, the length of the test piece along its own axis, and the length of the second connecting end along its own axis is set as a first length, which is greater than the length of the auxiliary mounting assembly along the axis of the first connecting end.

8. The coating adhesion testing apparatus according to any one of claims 1 to 4, characterized in that, The second pull assembly includes a base and a second connector having a second connecting end. The second connector has a fourth connecting end coaxially arranged with the second connecting end on the side away from the second connecting end. The fourth connecting end is detachably connected to the base.

9. The coating adhesion testing device according to claim 8, characterized in that, The first pull-up assembly is spaced above the second connection end, and the second connector has one side of the second connection end for supporting the auxiliary installation assembly.

10. The coating adhesion testing device according to claim 8, characterized in that, The fourth connecting end is provided with a third fixing hole that penetrates the fourth connecting end radially. The base is provided with a plug-in hole on one side near the second connecting member. The other side of the base is provided with a fourth fixing hole that penetrates the base and communicates with the plug-in hole. The second pull assembly also includes a second locking member. The second locking member is configured to pass through the third fixing hole and the fourth fixing hole when the fourth connecting end is plugged into the plug-in hole, and lock the fourth connecting end and the base together.

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