A semi-automatic sample preparation device for coating adhesion strength testing and its usage method

Abstract

This invention discloses a semi-automatic sample preparation device and its method for testing coating bonding strength, including a support and a sample block fixing part thereon, and an automated sample block advancing part. The sample block fixing part includes a sample block placement rack and a sample block fixing block. The former is fixed to the support and has an arc-shaped first groove extending through it in a direction perpendicular to the first surface of the support, where two sample blocks are placed coaxially. The latter is located on the sample placement rack and has an arc-shaped second groove on its lower surface. One end of the sample block fixing block is hinged to the sample block placement rack, and the other end can be locked to the placement rack. A hole extends through the sample fixing block. The automated sample block advancing part includes an electric push rod and a sensing system. The electric push rod is fixed to the support via a motor mounting bracket and is used to push the second sample block toward the first surface of the support. The sensing system detects the adhesive thickness and pushing pressure to control the start and stop of the electric push rod. This invention can produce high-quality sample blocks.

Description

Technical Field

[0001] This invention relates to the field of medical implant device research and development, specifically to a semi-automatic sample preparation device for coating bonding strength testing and its usage method. Background Technology

[0002] Adhesive repair and bonding are widely used in bonding products between metals and non-metals, metals and metals, and non-metals and non-metals. Conventional bonding typically uses direct vulcanization of rubber or crosslinking agents. The adhesive strength of crosslinking agents is generally determined through tensile testing. By measuring the maximum tensile force required to break the sample, the bonding strength of the crosslinking agent is monitored, thus judging the adhesive effect and process. In recent years, due to the development of coating production and curing technologies, coating applications have become increasingly widespread. The bonding strength of a coating is an important indicator for evaluating its performance, effect, and process. Currently, the testing of coating bonding strength mainly refers to national and international standards such as QJ1992.1~1992.25-1990, ISO8501, ISO2808, and ISO2409. Based on these standards, various sample preparation devices for coating bonding strength testing have been successfully developed. The development of these devices has significantly improved the efficiency and standardization of sample preparation, as well as the accuracy of test results.

[0003] However, existing sample preparation devices have the following problems. First, the adhesive curing effect of existing devices is poor, resulting in insufficient bonding strength. Second, existing bonding devices have low sample block bonding strength and large errors. Third, existing devices have low sample preparation efficiency, making it difficult to achieve batch and high-quality sample production, which seriously affects work efficiency. To address the above problems, this invention provides a semi-automatic sample preparation device and its usage method for coating bonding strength testing, to meet the needs of high-precision, high-efficiency, and batch production of samples. Summary of the Invention

[0004] To address the problems of slow sample preparation speed and low sample quality in existing technologies, this invention provides a semi-automatic sample preparation device and its usage method for coating bonding strength testing, which improves sample preparation accuracy and reduces sample preparation difficulty.

[0005] The present invention proposes the following solution:

[0006] A semi-automatic sample preparation device for testing coating bonding strength includes: a support and a sample block fixing part and an automatic sample block advancing part disposed on the support;

[0007] The sample block fixing part includes: a sample block placement rack and a sample block fixing block;

[0008] The sample block holder is fixed on the support, and an arc-shaped first groove is formed through it along a direction perpendicular to the first surface of the support.

[0009] The first and second sample blocks to be tested are cylindrical standard sample blocks, which are placed coaxially in the first groove;

[0010] The sample block fixing block is disposed on the sample placement rack, and its lower surface has an arc-shaped second groove. One end of the sample block fixing block is hinged to the sample block placement rack, and the other end can be locked to the sample block placement rack. When locked, the two sample blocks are fixed between the first groove and the second groove.

[0011] The sample fixing block has a through hole for injecting glue between the two sample blocks;

[0012] The automated sample block propulsion system includes: an electric push rod, a motor mounting base, and a sensing system;

[0013] The electric push rod is fixed to the support by a motor mounting bracket and is coaxially arranged with the sample block, and is used to push the sample block toward the first surface of the support.

[0014] The sensing system is used to detect the glue thickness and pushing pressure in order to control the start and stop of the electric actuator.

[0015] Furthermore, the sensing system includes: a photodetector, an adjustable photoelectric mounting plate, and a pressure sensor;

[0016] The adjustable photoelectric fixing plate is fixed at one end to the support;

[0017] The photodetector is fixed to an adjustable photoelectric mounting plate, and the photodetector is positioned above the hole via the adjustable photoelectric mounting plate for detection through the hole;

[0018] The pressure sensor is fixed to the end of the push rod of the electric push rod and is used to detect the pressure between the second sample block and the push rod.

[0019] Furthermore, the vertical distance between the signal emission position of the photodetector and the first surface of the support is the sum of the axial height of the columnar standard sample and the adhesive thickness required for the test.

[0020] Furthermore, the support includes: a first base frame and a second base frame;

[0021] The first base frame and the second base frame are assembled into a support through an easy-to-disassemble structure, and the support is L-shaped.

[0022] The adjustable photoelectric fixing plate and sample block placement rack are fixed on the second base frame, and the motor mounting base is fixed on the first base frame.

[0023] Furthermore, the surface roughness of the first groove is less than 0.8 micrometers.

[0024] Furthermore, the sample block fixing block is made of a transparent material;

[0025] The transparent material is one or more of PMMA, resin, and epoxy resin.

[0026] Furthermore, both the sample block fixing part and the sample block automated propulsion part are provided with at least five on the support.

[0027] Furthermore, the sample preparation device described above is used, and the specific steps include:

[0028] 1) Place the first and second sample blocks with coatings on their surfaces on the sample block holder and fasten the sample block fixing blocks;

[0029] 2) Inject glue between the two sample blocks through the hole, and stop when the amount of glue injected reaches the limit value of the gap space;

[0030] 3) Set the limit values ​​for the pressure sensor and photodetector, turn on the electric push rod, and push the push rod of the electric push rod to push the second sample block to abut against the first sample block; when the photodetector detects a change in the material from the glue to the second sample block and / or the pressure value of the pressure sensor reaches the safety limit value, the electric push rod stops working, the two sample blocks are further fixed by the sample block fixing block, and the electric push rod is controlled to retract.

[0031] 4) Disassemble the first base frame and the second base frame. Fix the first sample block and the second sample block fixed on the second base frame according to the standard such as QJ1992.1~1992.25-1990. After curing, the first sample block and the second sample block connected by glue on the sample block placement rack are the coating bonding strength test samples.

[0032] Furthermore, in step 3), the change in material specifically means that the material detected by the photodetector changes from glue to the second sample block. Thus, the glue thickness between the two sample blocks can be detected through this detection, which is exactly the glue thickness required for the test.

[0033] Furthermore, in step 2), the gap space limitation value is specifically stopped when the gap space is 2 / 3 to 3 / 4.

[0034] Compared with existing devices, the present invention has the following advantages and innovations:

[0035] 1) This invention includes a sample block fixing part and an automated sample block pushing part. The sample block fixing part includes a sample block placement rack, a sample block fixing block, a first sample block, and a second sample block. The automated sample block pushing part includes an electric push rod, a pressure sensor, and a photoelectric detector. These components are assembled in an orderly manner and work together to form the required semi-automatic sample preparation device for coating adhesion strength testing. The above structural design is original to this invention.

[0036] 2) The automated sample pushing part in this invention uses a photoelectric detector to detect the change in the material of the object, i.e., from glue to the second sample block, and stops the electric push rod, thereby controlling the sample preparation requirements and ensuring the glue thickness between the two sample blocks of the prepared test sample, thus obtaining a test sample with high precision that meets the testing standards; in addition, the pressure sensor detects the pressure state of the push rod, and if it exceeds the safety limit, the electric push rod stops moving and the sample is prepared again.

[0037] 3) In this invention, components such as the collaborative sample block holder and sample block fixing block achieve precise sample preparation for testing: the design roughness is less than 0.8 micrometers, and gaps are left for placing the sample block fixing block. The inner diameter of the first groove equals the inner diameter of the groove of the sample block fixing block, which equals the outer diameter of the sample block. The two sample blocks achieve precise focusing face-to-face. Moreover, the first groove is horizontally designed to ensure that the two sample blocks will not deviate as in a vertical device. Furthermore, adhesive can be injected through the holes on the sample block fixing block, and the transparent material of the sample block fixing block allows observation of the adhesive level, preventing overflow. The sample block fixing block... The holes on the block can release air during the later curing of the adhesive, reducing the formation of air bubbles in the adhesive layer. In addition, the double fixing of the sample block fixing block involves two stages: first, the initial fixing of the sample fixing block is to close the sample fixing block to ensure the initial alignment of the two sample blocks; and second, the further tightening of the sample fixing block after the electric push rod stops, which ensures that the pressure block is completely locked when the sample preparation position is reached, and that the sample block will not shift during the later transfer to the heat curing operation. The organic synergy of the above components ensures the accuracy of sample preparation and reduces the testing errors that may be caused by inaccurate focus of the sample block, air bubbles inside the adhesive layer, and adhesive overflow.

[0038] 4) The device in this invention includes a sample block fixing section and an automated sample pushing section. The sample block fixing section requires high-temperature heating to cure the adhesive, but the automated sample pushing section cannot withstand the high temperatures (high temperatures can easily damage components such as pressure sensors, electric push rods, and photodetectors). Therefore, a support assembled from a first base frame and a second base frame is designed, allowing for simple assembly and disassembly of the sample block fixing section and the automated sample pushing section. The second base frame allows the sample block fixing section to be transferred separately to a heating device such as an oven for subsequent adhesive curing. This structural design was developed specifically for the actual use scenarios and needs of the device, achieving an innovative application of existing structural design concepts.

[0039] 5) This device is easy to maintain and possesses strong modifiability and upgradeability. The sample block fixing part is entirely detachable, facilitating adhesive curing, without limiting curing conditions, and suitable for various curing coatings, making equipment maintenance and repair quick and efficient. In the main body, when maintenance or replacement of the sample block holder, sample block fixing block, electric push rod, pressure sensor, and photoelectric detector is required, the user can directly disassemble these components without performing cumbersome operations on the entire device, thereby saving maintenance time and costs and improving maintenance efficiency. Furthermore, the detachable design of this invention provides scalability and upgradeability. When the user's work tasks and requirements change, the functionality of the clamping device can be expanded by replacing or adding new components, extending the service life of the clamping device and adapting to ever-changing application needs.

[0040] 6) The semi-automatic sample preparation device for coating bonding strength testing in this invention is equipped with multiple identical components, which can simultaneously achieve efficient preparation of multiple sets of samples, greatly saving sample preparation time; and the sample parameters prepared by this device are stable, ensuring the stability of bonding strength data.

[0041] 7) This invention is designed based on the international coating monitoring standards ISO8501, ISO2808, ISO2409, and QJ1992.1~1992.25-1990. It can be widely applied to the testing of the bonding strength of samples such as antibacterial coatings, super-lubricating coatings, and paints, and has good versatility. Furthermore, the device does not limit the type of cured coating used and meets the requirements for testing the cohesive strength of both solid and liquid adhesives, further expanding the device's application range. Attached Figure Description

[0042] Figure 1 This is a two-dimensional plan view of a semi-automatic sample preparation device for coating bonding strength testing according to an embodiment of the present invention;

[0043] Figure 2This is a two-dimensional plan view of the sample block fixing part in a semi-automatic sample preparation device for coating bonding strength testing according to an embodiment of the present invention;

[0044] Figure 3 This is a three-dimensional structural schematic diagram of a semi-automatic sample preparation device for coating bonding strength testing according to an embodiment of the present invention.

[0045] In the figure: 1. Electric push rod; 2. Motor mounting base; 3. Pressure sensor; 4. Photodetector; 5. Adjustable photoelectric fixing plate; 6. First base frame; 7. Second base frame; 8. Sample block placement rack; 9. Sample block fixing block; 10. Glue; 11. Second sample block; 12. First sample block. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0048] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0049] A semi-automatic sample preparation device for testing coating bonding strength includes: a support and a sample block fixing part and an automatic sample block advancing part disposed on the support;

[0050] The sample block fixing part includes: a sample block placement rack 8 and a sample block fixing block 9;

[0051] The sample block placement rack 8 is fixed on the support, and an arc-shaped first groove is formed on it along the direction perpendicular to the first surface of the support.

[0052] The first sample block 12 and the second sample block 11 to be tested are columnar standard sample blocks required for testing, and are placed coaxially in the first groove;

[0053] The sample block fixing block 9 is disposed on the sample placement rack 8, and an arc-shaped second groove is formed on its lower surface. One end of the sample block fixing block 9 is hinged to the sample block placement rack 8, and the other end can be locked to the sample block placement rack 8. When locked, the two sample blocks are fixed between the first groove and the second groove.

[0054] A hole is provided in the sample block fixing block 9 for injecting glue 10 between the two sample blocks;

[0055] The automated sample block propulsion system includes: an electric push rod 1, a motor mounting base 2, and a sensing system;

[0056] The electric push rod 1 is fixed on the support by the motor mounting seat 2 and the electric push rod 1 is coaxially arranged with the sample block, and is used to push the second sample block 11 toward the first surface of the support.

[0057] The sensing system is used to detect the thickness of the adhesive 10 and the pushing pressure in order to control the start and stop of the electric push rod 1.

[0058] The required glue thickness is 0.25mm.

[0059] Example 1:

[0060] like Figure 1 , 23. A semi-automatic sample preparation device for coating bonding strength testing is divided into a support and a sample block fixing part and an automated sample block pushing part set on the support. The sample block fixing part includes a sample block placement rack 8, a sample block fixing block 9, a columnar first sample block 12 and a columnar second sample block 11. The automated sample block pushing part includes an electric push rod 1, a pressure sensor 3, a photoelectric detector 4, a motor mounting base 2 and an adjustable photoelectric fixing plate 5. The support adopts an L-shaped combined detachable / installable fixing base frame as the base of the sample block fixing part and the automated sample block pushing part. The first base frame 6 and the second base frame 7 respectively adopt the first L-shaped combined detachable / installable fixing base frame and the second L-shaped combined detachable / installable fixing base frame. In this embodiment, the sample block placement rack 8 adopts a semi-circular arc-shaped horizontal slide rail, the sample block fixing block 9 adopts a transparent perforated clamp, the electric push rod 1 adopts a stepper linear push rod motor, and the pressure sensor 3 adopts a wireless pressure sensor. The sample block fixing part and the automated sample block pushing part of this device are no less than 5 sets. A semi-circular arc-shaped horizontal slide rail is fixed to a second L-shaped combined detachable / installable fixing base. A first groove is formed along the upper edge of the semi-circular arc-shaped horizontal slide rail perpendicular to the first surface of the second L-shaped combined detachable / installable fixing base. A gap is formed in the first groove for a transparent perforated clamp to be inserted. The transparent perforated clamp consists of a fixed part and a movable part. The fixed part is inserted into the gap, and one end of the movable part is hinged to one end of the fixed part. The other end is connected to the other end of the fixed part by a screw. The inner surface of the transparent perforated clamp is flush with the inner surface of the first groove of the semi-circular arc-shaped horizontal slide rail. A second sample block 11 and a first sample block 12 are placed on the semi-circular arc-shaped horizontal slide rail, with one end of the first sample block 12 abutting against the first surface of the second L-shaped combined detachable / installable fixing base. In this embodiment, the thickness of the adhesive 10 meets the test requirements. The adjustable photoelectric fixing plate 5 is fixed to the end of the second L-shaped combined detachable / installable fixing base with a thickness of 0.25mm. The photoelectric detector 4 is fixed on the adjustable photoelectric fixing plate 5. The photoelectric detector 4 is placed above the hole on the transparent perforated clamp through the adjustable photoelectric fixing plate 5 for detection through the hole. The vertical distance from the signal emission position of the photoelectric detector 4 to the first surface of the support is the sum of the axial height of the columnar standard sample block and the thickness of the glue required for the test. This can indirectly determine whether the glue 10 meets the thickness required for the test. The stepper linear push rod motor is fixed to the first L-shaped combined detachable / installable fixing base through the motor mounting seat 2, and the push rod is set along the axis of the two sample blocks. The push rod of the stepper linear push rod motor faces the side of the second sample block 11, and a wireless pressure sensor is set at the end of the push rod.

[0061] Specifically, the semi-circular horizontal slide rail has an inner diameter of 25.4 mm, an inner surface roughness of less than 0.8 micrometers, a length of 70 mm, and a gap width of 5 mm (the gap is just enough to accommodate the fixing part of the transparent perforated clamp). The transparent perforated clamp is made of PMMA, with an outer diameter of 27.4 mm, an inner diameter of 25.4 mm, a length of 5 mm, a wall thickness of 2 mm, and a clamp hole diameter of 2-5 mm. The clamp's primary locking function is to align the two sample blocks, and its secondary locking function is to lock the two sample blocks in place, preventing them from shifting during the transfer to the high-temperature curing process. The holes serve three purposes: first, to inject adhesive; second, to remove air bubbles; and third, to allow the photoelectric detector 4 to detect material changes and control the start and stop of the stepper linear actuator motor.

[0062] Specifically, the stepper linear actuator motor has a maximum thrust of 150N (15GK), a high-precision step angle of 1.8 degrees, a rated current of 2.5A, a lead of 6.35mm, a step length of 0.03175mm, a lead screw diameter of 6.35mm, an effective stroke of 100mm, a maximum speed of 600 rpm, a 5A power supply, dimensions of 200-100-42mm, a working efficiency of 85%, an overload capacity greater than 105%, a ripple rate less than 150%, and an operating environment of -15°C to 55°C. The motor mounting bracket 2 is made of 45# steel.

[0063] Specifically, the wireless pressure sensor has a range of 0-30GK, a height of 35mm, a diameter of 20mm, and an M5 thread structure. The photodetector 4 measures 50*50*18mm, has a detection distance of 0-30cm, emits no visible red light, and uses a 5-wire relay with an open-normally closed output. Its operating voltage is 12-24VDC. The photodetector 4 and the wireless pressure sensor signal are automatically triggered; the stepper linear actuator motor stops operating in the event of no signal, power failure, or power outage.

[0064] Specifically, the parallelism of the L-shaped modular detachable / installable fixing base is 0. Both the first and second L-shaped modular detachable / installable fixing bases are easily detachable and installable. Specifically, the first L-shaped modular detachable / installable fixing base has an insertion port, and the lower end of the second L-shaped modular detachable / installable fixing base has an insertion rod. The insertion rod on the second L-shaped modular detachable / installable fixing base can be inserted into the insertion port on the first L-shaped modular detachable / installable fixing base, and then fixed with screws to complete the fixing of the L-shaped modular detachable / installable fixing base. Conversely, unscrewing the screws and pulling out the second L-shaped modular detachable / installable fixing base allows for disassembly. The disassembled second L-shaped modular detachable / installable fixing base, along with the sample block, can be transferred to the heating device for adhesive curing.

[0065] Example 2:

[0066] In this embodiment, both sample blocks used are titanium alloy sample blocks, and adhesive 10 is DL-110 medium-low temperature curing glossy single-component epoxy adhesive.

[0067] A semi-automatic sample preparation method for coating adhesion strength testing based on the apparatus of Example 1.

[0068] The specific steps include:

[0069] 1) Place the second sample block 11 and the first sample block 12 with silver antibacterial coating on the semi-circular horizontal slide rail, close the movable part of the transparent perforated clamp for the first fixation, that is, rotate the screw to close the fixing part and the movable part, and ensure that the hole on the transparent perforated clamp faces upward.

[0070] 2) Start injecting curing adhesive 10 into the hole of the transparent perforated clamp. Stop adding adhesive when the liquid level of adhesive 10 reaches 2 / 3 to 3 / 4 of the height of the transparent perforated clamp.

[0071] 3) Set the limits for the wireless pressure sensor and photodetector 4, turn on the stepper linear actuator motor, and the stepper linear actuator motor will start pushing the second sample block 11; when the limit value of photodetector 4 is reached, which is when the photodetector detects that the material has changed from glue 10 to the second sample block 11, that is, the thickness of glue 10 reaches 0.25mm, the stepper linear actuator motor stops working, and the transparent perforated clamp is tightened for a second fixation, that is, the screw is tightened, the push rod of the stepper linear actuator motor is withdrawn, and the sample blocks that are bonded together are left to stand for 24 hours; if the pressure of the pressure sensor reaches the safety limit value of 0.5N, the stepper linear actuator motor is stopped, and the sample is prepared again;

[0072] 4) Disassemble the sample block fixing part, transfer the sample block fixing part to an oven at 120℃ for curing for 24 hours, and then age for another 24 hours. After the end of the process, the required coating bonding strength test sample is obtained. The sample blocks obtained in this batch did not show any misalignment, nor did they show any overflow or air bubbles in the glue, proving that the precision of the prepared sample blocks met the standard.

[0073] The above embodiments are merely exemplary embodiments of the present invention. The stepper linear actuator motor, photoelectric detector, pressure sensor, and other devices are not limited in model or configuration and can be replaced or upgraded according to actual needs. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A semi-automatic sample preparation device for testing coating adhesion strength, characterized in that, include: Support and sample block fixing part and sample block automatic propulsion part set on the support; The sample block fixing part includes: a sample block placement rack (8) and a sample block fixing block (9); The sample block holder (8) is fixed on the support, and an arc-shaped first groove is opened through it along the direction perpendicular to the first surface of the support; The first sample block (12) and the second sample block (11) to be tested are columnar standard sample blocks, which are placed coaxially in the first groove; The sample block fixing block (9) is provided on the sample placement rack (8), and an arc-shaped second groove is provided on its lower surface. One end of the sample block fixing block (9) is hinged to the sample block placement rack (8), and the other end can be locked to the sample block placement rack (8). When locked, the two sample blocks are fixed between the first groove and the second groove. A hole is provided in the sample block fixing block (9) for injecting glue (10) between the two sample blocks; The automated sample block propulsion system includes: an electric push rod (1), a motor mounting base (2), and a sensing system; The electric push rod (1) is fixed on the support by the motor mounting seat (2) and the electric push rod (1) is coaxial with the sample block, and is used to push the second sample block (11) towards the first surface of the support; The sensing system is used to detect the thickness of the glue (10) and the pushing pressure in order to control the start and stop of the electric push rod (1).

2. The sample preparation apparatus according to claim 1, characterized in that, The sensing system includes: a photodetector (4), an adjustable photoelectric mounting plate (5), and a pressure sensor (3); The adjustable photoelectric fixing plate (5) is fixed at one end to the support; The photodetector (4) is fixed on the adjustable photoelectric fixing plate (5). The photodetector (4) is set above the hole through the adjustable photoelectric fixing plate (5) for detection through the hole. The pressure sensor (3) is fixed to the end of the push rod of the electric push rod (1) and is used to detect the pressure between the second sample block (11) and the push rod.

3. The sample preparation apparatus according to claim 2, characterized in that, The vertical distance between the signal emission position of the photodetector (4) and the first surface of the support is the sum of the axial height of the columnar standard sample block and the thickness of the glue required for the test.

4. The sample preparation apparatus according to claim 2, characterized in that, The support includes: a first base frame (6) and a second base frame (7); The first base frame (6) and the second base frame (7) are assembled into a support by an easy-to-disassemble structure, and the support is L-shaped; The adjustable photoelectric fixing plate (5) and the sample block placement rack (8) are fixed on the second base frame (7), and the motor mounting base (2) is fixed on the first base frame (6).

5. The sample preparation apparatus according to claim 1, characterized in that, The surface roughness of the first groove is less than 0.8 micrometers.

6. The sample preparation apparatus according to claim 1, characterized in that, The sample block fixing block (9) is made of transparent material; The transparent material is one or more of PMMA, resin, and epoxy resin.

7. The sample preparation apparatus according to claim 1, characterized in that, Both the sample block fixing part and the sample block automatic propulsion part are provided with at least five on the support.

8. A semi-automatic sample preparation method for testing coating adhesion strength, characterized in that, The sample preparation apparatus described in any one of claims 1-7 is used, and the specific steps include: 1) Place the first sample block (12) and the second sample block (11) with a coating on their surface on the sample block holder (8) and fasten the sample block fixing block (9); 2) Inject glue (10) between the two sample blocks through the hole, and stop when the amount of glue (10) injected reaches the limit value of the gap space; 3) Set the limit values ​​of the pressure sensor (4) and photodetector (4), turn on the electric push rod (1), and the push rod of the electric push rod (1) pushes the second sample block (11) to abut against the first sample block (12); when the photodetector (4) detects the material change from glue to the second sample block and / or the pressure value of the pressure sensor (3) reaches the safety limit value, the electric push rod (1) stops working, and the two sample blocks are further fixed by the sample block fixing block (9), and the electric push rod (1) is controlled to retract the push rod; 4) Disassemble the first base frame (6) and the second base frame (7), remove the adjustable photoelectric fixing plate (5) along with the photoelectric detector (4) from the second base frame (7), and cure the first sample block (12) and the second sample block (11) fixed on the second base frame (7) according to the test standard. After curing, the first sample block (12) and the second sample block (11) connected by glue (10) on the sample block placement rack (8) are the coating bonding strength test samples.

9. The method according to claim 8, characterized in that, In step 3), the material change specifically means that the material detected by the photodetector changes from glue (10) to the second sample block (12).

10. The method according to claim 8, characterized in that, In step 2), the gap space limit value is specifically set to stop when the gap space is 2 / 3 to 3 / 4 of the total gap space.

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