A tooling apparatus and method for preparing a shear strength test sample

Abstract

The present application relates to the technical field of material mechanical property testing, and provides a device and method for preparing a shear strength test sample, which comprises: test devices, at least two, provided with an adhesive surface and a through hole; a glue coating device, provided with a baffle assembly, which forms a clamping groove; when the test device is placed in the clamping groove, the height of the baffle assembly is higher than that of the adhesive surface, and the difference between the height of the baffle assembly and that of the adhesive surface is the thickness of the glue layer; an adhesive device, provided with a mounting groove, in which a positioning protrusion is arranged; and a pressing device, comprising a pressing plate and a connecting plate, which is vertically arranged below the pressing plate. The device for preparing a shear strength test sample has the advantages that the glue layer of the prepared shear strength test sample is uniform, there is no adhesive misplacement, and the pressure is controllable.

Description

Technical Field

[0001] This invention relates to the field of material mechanical property testing technology, and more specifically, to a tooling apparatus and method for preparing shear strength test samples. Background Technology

[0002] Shear strength is an important indicator for evaluating the performance of materials (such as composites and adhesives). Currently, shear test samples are typically prepared by bonding the sample to a pair of test fixtures with adhesives. This traditional method has the following main problems:

[0003] 1. Uneven glue application: It is difficult to accurately control the thickness of the glue layer when applying glue by hand, which can easily lead to uneven glue layer thickness;

[0004] 2. Adhesion misalignment: During the bonding process, the two test fixtures and the sample in the middle are prone to positional shifts, resulting in non-parallel or misaligned bonding surfaces;

[0005] 3. Difficulty in controlling pressure: The pressure applied during curing is not easy to control precisely and maintain uniformly. Excessive pressure may damage the sample or adhesive layer, while insufficient pressure will affect the bonding strength.

[0006] These issues can lead to unstable sample quality, affecting the accuracy and repeatability of shear strength test results.

[0007] In view of this, the present invention is hereby proposed. Summary of the Invention

[0008] The purpose of this invention is to provide a tooling device and method for preparing shear strength test samples, so as to solve the problems of uneven adhesive layer, misalignment of bonding and difficulty in controlling pressure in the existing shear test sample preparation methods. These problems lead to unstable sample quality and affect the accuracy and repeatability of shear strength test results.

[0009] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0010] A tooling apparatus for preparing shear strength test samples, the tooling apparatus comprising:

[0011] A test fixture, wherein there are at least two test fixtures, and an adhesive surface and a through hole are provided on the test fixture;

[0012] An adhesive application fixture is provided for uniformly applying adhesive to the bonding surface. A baffle assembly is provided on the adhesive application fixture, and the baffle assembly forms a slot for accommodating a test fixture. When the test fixture is placed in the slot, the height of the baffle assembly is higher than the height of the bonding surface, and the difference between the height of the baffle assembly and the height of the bonding surface is the thickness of the adhesive layer.

[0013] An adhesive fixture is used to bond two test fixtures together with the sample to be tested. The adhesive fixture is provided with mounting grooves, and positioning protrusions are provided in each mounting groove. The positioning protrusions cooperate with the through holes.

[0014] A pressure fixture, comprising a pressure plate and a connecting plate, wherein the connecting plate is vertically disposed below the pressure plate and the pressure plate and the connecting plate form a T-shape; when the pressure fixture applies pressure to the test fixture during the bonding process, the pressure plate is horizontally disposed above the test fixture, and the connecting plate is vertically disposed and fitted against one side of the test fixture.

[0015] Furthermore, the mounting groove includes a first groove and a second groove, the first groove being deeper than the second groove, the first groove being used for placing the test fixture upright, and the second groove being used for placing the test fixture upside down.

[0016] Furthermore, the positioning protrusion includes a first protrusion and a second protrusion, the first protrusion being disposed in the first groove and the second protrusion being disposed in the second groove.

[0017] Furthermore, the bonding fixture and the pressure fixture are detachably connected.

[0018] Furthermore, a first mounting hole is provided on the bonding fixture, and a second mounting hole is provided on the pressure fixture, the second mounting hole cooperating with the first mounting hole.

[0019] Furthermore, an opening is provided on one side of the card slot.

[0020] Furthermore, the adhesive coating tool is made of one of the following materials: polytetrafluoroethylene, polyimide, and silicone.

[0021] Furthermore, the coefficient of thermal expansion of the material of the bonding tooling is <20×10⁻⁶. -6 / ℃.

[0022] Furthermore, the bonding surface is subjected to grinding, machining, or sandblasting.

[0023] A second aspect of the present invention provides a method for preparing a shear strength test sample, the method using a tooling apparatus for preparing a shear strength test sample as described in any one of the claims, the method comprising the following steps:

[0024] S1. Cleaning and preparation: Clean the bonding surfaces of the test fixture with a cleaning agent and dry them;

[0025] S2. Applying adhesive: Using an adhesive application fixture, apply adhesive to the bonding surfaces of the two test fixtures to obtain an adhesive layer;

[0026] S3. Positioning and bonding: Bond the two test fixtures to the test sample together on the bonding fixture;

[0027] S4. Pressure curing: Place the pressure fixture on top of the bonded, upside-down test fixture, align the second mounting hole of the pressure fixture with the first mounting hole of the bonded fixture, screw in the third connector, and then cure.

[0028] S5. Post-processing and testing: After curing, remove the third connector and pressure fixture, take out the sample assembly to be tested from the bonding fixture, remove the sample assembly to be tested bonded to the two test fixtures, clean the cured adhesive overflowing around the sample to be tested, and after inspection and approval, the shear strength test can be carried out.

[0029] The present invention provides a tooling apparatus and method for preparing shear strength test samples. Compared with the prior art, the tooling apparatus and method for preparing shear strength test samples of the present invention have the following advantages:

[0030] 1. Uniform adhesive layer: The adhesive application tooling ensures that the adhesive layer thickness is precisely controllable and uniform;

[0031] 2. No Adhesion Misalignment: The installation groove and positioning protrusion design of the adhesive fixture completely eliminates the slippage and misalignment of the fixture during the bonding process;

[0032] 3. Precise and controllable pressure: The pressure fixture combined with a torque wrench can precisely apply and maintain the required curing pressure;

[0033] 4. High sample quality: Significantly improves sample preparation accuracy and consistency of sample quality;

[0034] 5. Simple and efficient operation: Tooling-based operation simplifies the process, improves efficiency, and reduces reliance on operator experience;

[0035] 6. Reliable test results: ultimately obtaining more accurate and repeatable shear strength test data. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural schematic diagram of a test fixture for preparing shear strength test samples according to an embodiment of the present invention;

[0037] Figure 2 This is a second three-dimensional structural schematic diagram of a testing fixture for preparing shear strength test samples according to an embodiment of the present invention;

[0038] Figure 3 This is a three-dimensional structural schematic diagram of the adhesive coating fixture of a tooling device for preparing shear strength test samples according to an embodiment of the present invention;

[0039] Figure 4 This is a three-dimensional structural diagram of a tooling device for preparing shear strength test samples according to an embodiment of the present invention, in which the test tooling is mounted on an adhesive coating tooling.

[0040] Figure 5 This is a three-dimensional structural schematic diagram of the bonding fixture of a tooling device for preparing shear strength test samples according to an embodiment of the present invention;

[0041] Figure 6 This is one of the three-dimensional structural diagrams of a tooling device for preparing shear strength test samples according to an embodiment of the present invention, in which the test tooling is mounted on an adhesive tooling;

[0042] Figure 7 This is a second three-dimensional structural diagram of a tooling device for preparing shear strength test samples according to an embodiment of the present invention, in which the test tooling is mounted on an adhesive tooling.

[0043] Figure 8 This is a three-dimensional structural schematic diagram of a pressure fixture for preparing a shear strength test sample according to an embodiment of the present invention;

[0044] Figure 9 This is a second three-dimensional structural schematic diagram of the pressure fixture of a tooling device for preparing shear strength test samples according to an embodiment of the present invention;

[0045] Figure 10 This is a three-dimensional structural diagram of the testing fixture and pressure fixture of the tooling device for preparing shear strength test samples according to an embodiment of the present invention, which are installed on the bonding fixture.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Testing fixture; 11. Bonding surface; 12. Through hole; 13. Reinforcing protrusion; 2. Glue application fixture; 21. Baffle assembly; 22. Slot; 23. Opening; 3. Bonding fixture; 30. Mounting groove; 31. First groove; 32. Second groove; 33. Positioning protrusion; 331. First protrusion; 332. Second protrusion; 34. First mounting hole; 4. Pressurizing fixture; 41. Pressure plate; 42. Connecting plate; 43. Second mounting hole. Detailed Implementation

[0048] To make the technical means and objectives and effects of the present invention easier to understand, the embodiments of the present invention will be described in detail below with reference to specific illustrations.

[0049] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0050] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0053] Example 1

[0054] Current techniques for preparing shear test samples typically involve using adhesives to bond the sample to a pair of test fixtures. This traditional method has the following main problems:

[0055] 1. Uneven glue application: It is difficult to accurately control the thickness of the glue layer when applying glue by hand, which can easily lead to uneven glue layer thickness;

[0056] 2. Adhesion misalignment: During the bonding process, the two test fixtures and the sample in the middle are prone to positional shifts, resulting in non-parallel or misaligned bonding surfaces;

[0057] 3. Difficulty in controlling pressure: The pressure applied during curing is not easy to control precisely and maintain uniformly. Excessive pressure may damage the sample or adhesive layer, while insufficient pressure will affect the bonding strength.

[0058] These issues can lead to unstable sample quality, affecting the accuracy and repeatability of shear strength test results.

[0059] To solve the above technical problems, such as Figures 1-10 As shown in the figure, this embodiment proposes a tooling device for preparing shear strength test samples, the tooling device comprising:

[0060] Test fixture 1 is used to perform shear test on the testing machine. The shear strength test sample is a sample assembly of the sample to be tested bonded to two test fixtures 1. There are at least two test fixtures 1. Bonding surface 11 and through hole 12 are provided on the test fixture 1.

[0061] A gluing fixture 2 is used to uniformly apply adhesive to the bonding surface 11. A baffle assembly 21 is provided on the gluing fixture 2, forming a slot 22 for accommodating the testing fixture 1. Figure 4 As shown, when the test fixture 1 is placed in the slot 22, the height of the baffle assembly 21 is higher than the height of the adhesive surface 11. The difference between the height of the baffle assembly 21 and the height of the adhesive surface 11 is the thickness of the adhesive layer. By scraping along the upper edge of the baffle assembly 21 with a scraper, the thickness of the adhesive layer can be precisely controlled, ensuring uniform application and overcoming the problems of difficulty in accurately controlling the thickness of the adhesive layer and uneven thickness in manual application.

[0062] The bonding fixture 3 is used to bond the two test fixtures 1 together with the sample to be tested. The bonding fixture 3 is provided with mounting grooves 30, and each mounting groove 30 is provided with a positioning protrusion 33, which cooperates with the through hole 12. This setting enables the bonding fixture 3 to accurately position the test fixture 1, effectively prevents bonding misalignment, and avoids the situation where the bonding surfaces 11 are not parallel or misaligned.

[0063] The pressure fixture 4 includes a pressure plate 41 and a connecting plate 42. The connecting plate 42 is vertically disposed below the pressure plate 41. When the pressure fixture 4 applies pressure to the test fixture 1 during the bonding process, the pressure plate 41 is horizontally disposed above the test fixture 1, and the connecting plate 42 is vertically disposed and fitted to one side of the test fixture 1. This arrangement enables the height of the connecting plate 42 to achieve a constant thickness pressure function, ensuring that the total thickness of the sample and the adhesive layer is constant after bonding, avoiding damage to the sample or adhesive layer due to uneven pressure, and preventing the bonding strength from being affected.

[0064] The tooling device for preparing shear strength test samples described in this embodiment has the following beneficial effects:

[0065] 1. Precise and uniform adhesive application: The baffle assembly 21 of the adhesive application fixture 2 forms a groove 22. After the test fixture 1 is placed into the groove 22, the height difference between the baffle assembly 21 and the bonding surface 11 is the preset adhesive layer thickness. By scraping the adhesive along the upper edge of the baffle assembly 21 with a scraper, the adhesive layer thickness can be precisely controlled, effectively overcoming the problems of difficulty in precise control and inconsistent adhesive layer thickness in manual adhesive application, ensuring uniform adhesive application, and laying the foundation for high-quality bonding;

[0066] 2. Precise bonding positioning: The mounting groove 30 of the bonding fixture 3 is provided with a positioning protrusion 33, which cooperates with the through hole 12 on the test fixture 1. During the bonding process, the bonding fixture 3 can accurately position the test fixture 1, effectively preventing the two test fixtures 1 and the sample to be tested in the middle from shifting positions, avoiding the situation that the bonding surfaces 11 are not parallel or misaligned, and ensuring the accuracy and reliability of bonding.

[0067] 3. Stable and reliable pressure application: The pressure application fixture 4 includes a pressure plate 41 and a connecting plate 42. The connecting plate 42 is vertically arranged below the pressure plate 41. When the pressure application fixture 4 applies pressure to the test fixture 1 during the bonding process, the pressure plate 41 is horizontally arranged above the test fixture 1, and the connecting plate 42 is vertically arranged and attached to one side of the test fixture 1. This arrangement enables the height of the connecting plate 42 to achieve a constant thickness pressure function, ensuring that the total thickness of the sample and the adhesive layer is constant after bonding, avoiding damage to the sample or adhesive layer due to uneven pressure, as well as the problem of affecting the bonding strength.

[0068] 4. Improve the stability of the prepared sample quality, thereby obtaining more accurate and repeatable shear strength test data.

[0069] More specifically, a through hole 12 is provided on the test fixture 1. On the one hand, it facilitates the cooperation with the positioning protrusion 33 of the bonding fixture 3 when preparing the shear strength test sample, which can effectively prevent the test fixture 1 from slipping or misaligning during bonding. On the other hand, it facilitates the connection of the first connector to the test fixture 1 and the testing machine through the through hole 12 during testing, ensuring that the shear surface is perpendicular and eliminating lateral force interference.

[0070] More specifically, such as Figure 1 and Figure 2 As shown, a reinforcing protrusion 13 is provided on the test fixture 1, and the through hole 12 is provided on the reinforcing protrusion 13. This arrangement can improve the structural strength of the through hole 12.

[0071] Specifically, the mounting groove 30 includes a first groove 31 and a second groove 32, wherein the depth of the first groove 31 is greater than that of the second groove 32; the first groove 31 is used to place the test fixture 1 in the upright position, and the second groove 32 is used to place the test fixture 1 in the inverted position.

[0072] More specifically, the depth difference between the first groove 31 and the second groove 32 is equal to the thickness of the test sample plus the total thickness of the two adhesive layers.

[0073] More specifically, such as Figure 5 As shown, the first groove 31 and the second groove 32 form a straight line.

[0074] Furthermore, the number of mounting grooves 30 is not specifically limited; the number of mounting grooves 30 can be set to two, four, or six, etc.

[0075] Preferably, in this embodiment, such as Figure 5 As shown, the number of mounting grooves 30 is set to six.

[0076] This setting facilitates the preparation of multiple samples at once, improving sample preparation efficiency.

[0077] Specifically, the positioning protrusion 33 includes a first protrusion 331 and a second protrusion 332. The first protrusion 331 is disposed in the first groove 31, and the second protrusion 332 is disposed in the second groove 32.

[0078] Specifically, the bonding fixture 3 and the pressure-applying fixture 4 are detachably connected. This detachable connection facilitates the assembly and disassembly of the fixtures, making operation and maintenance easier.

[0079] Specifically, such as Figure 5 As shown, a first mounting hole 34 is provided on the bonding fixture 3. The first mounting hole 34 is used to connect with the pressure fixture 4 to apply bonding pressure; as Figure 8 and Figure 9 As shown, a second mounting hole 43 is provided in the pressure fixture 4, and the second mounting hole 43 cooperates with the first mounting hole 34.

[0080] More specifically, when the pressure fixture 4 applies pressure to the test fixture 1 during the bonding process, a torque wrench is used to tighten the third connector, which passes through the second mounting hole 43 and the first mounting hole 34 in sequence to connect the pressure fixture 4 to the bonding fixture 3, thereby precisely controlling the pressure.

[0081] Furthermore, the connecting plate 42 can be vertically disposed on one side below the pressure plate 41, or the connecting plate 42 can be vertically disposed in the middle position below the pressure plate 41, and there is no specific limitation.

[0082] Preferably, in this embodiment, such as Figure 8 and Figure 9 As shown, the pressure plate 41 and the connecting plate 42 form a T-shape, with the connecting plate 42 vertically positioned below the pressure plate 41 at the center. This arrangement allows the connecting plate 42 to achieve a constant thickness pressure function, ensuring a constant total thickness of the sample and adhesive layer after bonding, avoiding damage to the sample or adhesive layer due to uneven pressure, and preventing issues with bonding strength. It also facilitates the preparation of multiple samples at once, improving sample preparation efficiency.

[0083] More specifically, the second mounting hole 43 is provided through the pressure fixture 4.

[0084] More specifically, such as Figure 9 As shown, the second mounting hole 43 is disposed through the center of the connecting plate 42. This arrangement ensures the pressure stability of the pressure fixture 4.

[0085] Specifically, such as Figure 3 As shown, an opening 23 is provided on one side of the slot 22 to facilitate the assembly and removal of the test fixture 1.

[0086] Specifically, the adhesive application fixture 2 is made of one of the following materials: polytetrafluoroethylene, polyimide, and silicone, which facilitates the cleaning of excess adhesive, keeps the fixture clean, and reduces the impact on subsequent operations.

[0087] Specifically, the coefficient of thermal expansion of the material of the bonding fixture 3 is <20×10⁻⁶. -6 / ℃.

[0088] Preferably, in this embodiment, the bonding fixture 3 is made of 45 steel to ensure stable dimensional accuracy, ensure pressure accuracy, and improve the quality of sample preparation.

[0089] Specifically, such as Figure 1 As shown, the bonding surface 11 is treated by grinding, machining, or sandblasting. This treatment increases the roughness of the bonding surface 11 to improve the bonding strength and make the samples bond more firmly.

[0090] A second aspect of this embodiment provides a method for preparing a shear strength test sample, the method using any one of the tooling apparatuses described in the embodiment for preparing a shear strength test sample, the method comprising the following steps:

[0091] S1. Cleaning and preparation: Clean the bonding surface 11 of the test fixture 1 with a cleaning agent and dry it;

[0092] S2. Applying adhesive: Using the adhesive application tool 2, apply adhesive to the bonding surfaces 11 of the two test tool 1 to obtain an adhesive layer;

[0093] S3, Positioning and bonding: Bond the two test fixtures 1 together with the test sample on the bonding fixture 3;

[0094] S4. Pressure curing: Place the pressure fixture 4 on top of the bonded, upside-down test fixture 1, aligning the second mounting hole 43 of the pressure fixture 4 with the first mounting hole 34 of the bonding fixture 3. Use a torque wrench to screw in the third connector, and then cure it.

[0095] S5. Post-processing and testing: After curing, remove the third connector and pressure fixture 4, take out the bonded sample assembly from the bonding fixture 3, clean the cured adhesive overflowing around the test sample, and after inspection and approval, the shear strength test can be carried out.

[0096] The method for preparing shear strength test samples described in this embodiment has the following beneficial effects:

[0097] 1. Uniform adhesive layer: The adhesive application fixture 2 ensures that the adhesive layer thickness is precise, controllable, and uniform;

[0098] 2. No adhesive misalignment: The installation groove 30 and positioning protrusion 33 of the adhesive fixture 3 are designed to completely eliminate the slippage and misalignment of the fixture during the adhesive process;

[0099] 3. Precise and controllable pressure: The pressure fixture 4, combined with a torque wrench, can precisely apply and maintain the required curing pressure;

[0100] 4. High sample quality: Significantly improves sample preparation accuracy and consistency of sample quality;

[0101] 5. Simple and efficient operation: Tooling-based operation simplifies the process, improves efficiency, and reduces reliance on operator experience;

[0102] 6. Reliable test results: ultimately obtaining more accurate and repeatable shear strength test data.

[0103] Step S2 specifically includes the following steps:

[0104] S21. Place a test fixture 1 into the slot 22 of the glue application fixture 2;

[0105] S22. Use a scraper to scrape the adhesive. The scraper is pressed against the upper edge of the baffle assembly 21 of the adhesive application fixture 2 and scrapes evenly. The difference between the height of the baffle assembly 21 and the height of the bonding surface 11 is the thickness of the adhesive layer.

[0106] S23. Remove the glued test fixture 1 from the glue-applying fixture 2;

[0107] S24. Repeat the above steps to apply adhesive to another test fixture 1.

[0108] Step S3 specifically includes the following steps:

[0109] S31. First, place a test fixture 1 coated with glue in the first groove 31 of the bonding fixture 3, with its through hole 12 engaging with the first protrusion 331.

[0110] S32. Next, align the sample to be tested on the bonding surface 11 of the test fixture 1.

[0111] S33. Finally, another test fixture 1 with glue applied is placed upside down in the second groove 32 of the bonding fixture 3, with its through hole 12 cooperating with the second protrusion 332, and its bonding surface 11 precisely aligned and attached to the sample to be tested.

[0112] In this embodiment, a shear test sample of a composite material sheet with a thickness of 0.7 mm is prepared, that is, the thickness of the sample to be tested is 0.7 mm.

[0113] Parameters of the tooling device:

[0114] Test fixture 1: The bonding surface 11 of test fixture 1 has a size of 50 mm × 50 mm.

[0115] Glue application fixture 2: The glue application fixture 2 is made of polytetrafluoroethylene. The height of the baffle assembly 21 is 1.0 mm higher than the bonding surface 11 of the test fixture 1, that is, the thickness of the glue layer is designed to be 1.0 mm.

[0116] Adhesion fixture 3: The material of the adhesion fixture 3 is aluminum alloy. The depth of the second groove 32 is D1, and the depth of the first groove 31 is D2. The depth difference D2-D1=2.2 mm (that is, the thickness of the sample to be tested is 0.7 mm + the total thickness of the two adhesive layers is 2.0 mm = 2.7 mm. After the pressure fixture 4 applies pressure, the adhesive overflows to ensure that the bonding surface 11 is not short of adhesive. Finally, the thickness of the sample to be tested + the thickness of the two adhesive layers = 2.2 mm).

[0117] The pressure fixture 4 is made of 45 steel. The height of the connecting plate 42 is designed according to the depth of the mounting groove 30 of the bonding fixture 3 and the thickness of the testing fixture 1 to ensure a fixed thickness of 2.2mm for pressure application.

[0118] In this embodiment, the adhesive used is a polyurethane adhesive, which needs to be cured at room temperature for 7 days.

[0119] Five samples prepared using the tooling and method described above for preparing shear strength test samples were subjected to shear strength testing. The test results are shown in Table 1.

[0120] Table 1. Shear strength of the samples prepared for shear strength testing

[0121]

[0122] As shown in Table 1, the standard deviation of the shear strength of the five samples is 0.38 MPa, indicating that the data dispersion among the samples is small and the sample preparation repeatability is good.

[0123] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A tooling apparatus for preparing shear strength test samples, characterized in that, The tooling device includes: Test fixture (1), there are at least two test fixtures (1), and an adhesive surface (11) and a through hole (12) are provided on the test fixture (1). A gluing fixture (2) is used to uniformly apply adhesive to the bonding surface (11). A baffle assembly (21) is provided on the gluing fixture (2). The baffle assembly (21) forms a slot (22) for accommodating the test fixture (1). When the test fixture (1) is placed in the slot (22), the height of the baffle assembly (21) is higher than the height of the bonding surface (11). The difference between the height of the baffle assembly (21) and the height of the bonding surface (11) is the thickness of the adhesive layer. The bonding fixture (3) is used to bond the two test fixtures (1) together with the sample to be tested. The bonding fixture (3) is provided with an installation groove (30). The installation groove (30) is provided with a positioning protrusion (33) in each of the installation grooves (30). The positioning protrusion (33) cooperates with the through hole (12). The pressure fixture (4) includes a pressure plate (41) and a connecting plate (42). The connecting plate (42) is vertically arranged below the pressure plate (41). The pressure plate (41) and the connecting plate (42) form a T-shape. When the pressure fixture (4) applies pressure to the test fixture (1) during the bonding process, the pressure plate (41) is horizontally arranged above the test fixture (1), and the connecting plate (42) is vertically arranged and attached to one side of the test fixture (1). The mounting groove (30) includes a first groove (31) and a second groove (32). The depth of the first groove (31) is greater than that of the second groove (32). The first groove (31) is used to place the test fixture (1) in the forward direction, and the second groove (32) is used to place the test fixture (1) in the backward direction. The positioning protrusion (33) includes a first protrusion (331) and a second protrusion (332). The first protrusion (331) is disposed in the first groove (31), and the second protrusion (332) is disposed in the second groove (32). A first mounting hole (34) is provided on the bonding fixture (3), and a second mounting hole (43) is provided on the pressure fixture (4), wherein the second mounting hole (43) cooperates with the first mounting hole (34); When the pressure fixture (4) applies pressure to the test fixture (1) during the bonding process, a torque wrench is used to tighten the third connector, which passes through the second mounting hole (43) and the first mounting hole (34) in sequence to connect the pressure fixture (4) to the bonding fixture (3).

2. The tooling apparatus for preparing shear strength test samples according to claim 1, characterized in that, The bonding fixture (3) and the pressure fixture (4) are detachably connected.

3. The tooling apparatus for preparing shear strength test samples according to claim 1, characterized in that, An opening (23) is provided on one side of the card slot (22).

4. The tooling apparatus for preparing shear strength test samples according to claim 1, characterized in that, The adhesive coating tool (2) is made of one of the following materials: polytetrafluoroethylene, polyimide, and silicone.

5. The tooling apparatus for preparing shear strength test samples according to claim 1, characterized in that, The coefficient of thermal expansion of the material of the bonding fixture (3) is <20×10. -6 / ℃.

6. The tooling apparatus for preparing shear strength test samples according to claim 1, characterized in that, The bonding surface (11) is treated by grinding, machining or sandblasting.

7. A method for preparing a shear strength test sample, characterized in that, The method uses a tooling apparatus for preparing shear strength test samples as described in any one of claims 1 to 6, and the method includes the following steps: S1. Cleaning and preparation: Clean the bonding surface (11) of the test fixture (1) with a cleaning agent and dry it; S2, Applying adhesive: Using the adhesive application tool (2), apply adhesive to the bonding surface (11) of the two test tool (1) to obtain the adhesive layer; S3, Positioning and bonding: Bond the two test fixtures (1) together with the test sample on the bonding fixture (3); S4, Pressure curing: Place the pressure fixture (4) on top of the bonded, upside-down test fixture (1), align the second mounting hole (43) of the pressure fixture (4) with the first mounting hole (34) of the bonding fixture (3), screw in the third connector, and then cure. S5. Post-processing and testing: After curing, remove the third connector and the pressure fixture (4), take out the sample assembly of the sample to be tested bonded to the two test fixtures (1) from the bonding fixture (3), remove the cured adhesive overflowing around the sample to be tested, and after inspection and approval, the shear strength test can be carried out.

8. The method for preparing a shear strength test sample according to claim 7, characterized in that, Step S2 specifically includes the following steps: S21. Place a test fixture (1) into the slot (22) of the glue application fixture (2); S22. Use a scraper to scrape the adhesive. The scraper is pressed against the upper edge of the baffle assembly (21) of the adhesive application fixture (2) and scrapes evenly. The difference between the height of the baffle assembly (21) and the height of the bonding surface (11) is the thickness of the adhesive layer. S23. Take out the glued test fixture (1) from the glue-applying fixture (2); S24. Repeat the above steps to apply glue to another test fixture (1).

9. The method for preparing a shear strength test sample according to claim 7, characterized in that, Step S3 specifically includes the following steps: S31. First, place a test fixture (1) coated with glue in the first groove (31) of the bonding fixture (3) with its through hole (12) matching the first protrusion (331). S32. Align the sample to be tested with the adhesive surface (11) of the test fixture (1); S33. Finally, another test fixture (1) with glue applied is placed upside down in the second groove (32) of the bonding fixture (3), its through hole (12) is matched with the second protrusion (332), and its bonding surface (11) is precisely aligned and fitted with the sample to be tested.

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