An apparatus and method for preparing a test specimen for measuring the interfacial bond strength of a fiber composite

Abstract

The application discloses a kind of mechanism and method of fiber composite material interface bonding strength test sample preparation, it is related to material interface bonding strength test technical field, including drivable base, cladding type mobile base, rack, drip device and fiber sample;Rack includes horizontal base and the vertical support of setting in horizontal base one end, drivable base and cladding type mobile base are slidably arranged on horizontal base, drip device is installed on vertical support, fiber sample is installed between drivable base and cladding type mobile base top, and drip device is positionally corresponding with fiber sample.The application can realize the accurate positioning of fiber sample by drivable base, cladding type mobile base, and the volume size of matrix can be accurately controlled by drip device to prepare composite material.The mechanism reduces sample preparation error, reduces cost consumption, and improves interface strength performance test precision.

Description

Technical Field

[0001] This invention relates to the field of material interfacial bonding strength testing technology, and more specifically to the field of a mechanism and method for preparing test specimens for interfacial bonding strength of fiber composite materials. It is applicable to the preparation of composite materials using the monofilament embedding method and improves the accuracy of interfacial strength performance testing. Background Technology

[0002] Fiber composites possess excellent mechanical properties and have demonstrated unique advantages in numerous fields, becoming key materials driving progress across various industries. Currently, there is still significant room for improvement in the performance of fiber composites. Among these, the interfacial strength between the fiber and the matrix remains a critical bottleneck restricting further development. While the monofilament embedding method, a classic technique for testing the interfacial bonding strength of fiber composites, offers some operational convenience, it suffers from the inability to precisely position and control the orientation. This leads to variations in the adhesion distance and volume of the matrix on the fiber, causing a severe imbalance in the test load transfer and significantly weakening the accuracy of testing the overall mechanical properties and interfacial bonding performance of the composite material.

[0003] To address the issue of errors in sample preparation using the monofilament embedding method for fiber interfacial bonding performance testing, breakthroughs in precise positioning and orientation control techniques are needed to improve the accuracy of interfacial strength performance testing. Developing a mechanism for high-precision preparation of fiber composite interfacial bonding strength samples, enabling precise positioning and accurate control of the matrix volume using the monofilament embedding method, thereby improving the accuracy of interfacial strength performance testing and reducing costs, is a direction that those skilled in the art should strive towards. Summary of the Invention

[0004] The purpose of this invention is to provide a mechanism and method for preparing test specimens for interfacial bonding strength of fiber composite materials in order to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0006] The first aspect of the present invention provides a mechanism for preparing a fiber composite interfacial bonding strength test specimen, including a driveable base, a covered movable base, a stand, a dripping device, and a fiber specimen;

[0007] The stand includes a horizontal base and a vertical support set at one end of the horizontal base. Both the driveable base and the coverable movable base are slidably set on the horizontal base. The dripping device is installed on the vertical support. The fiber sample is installed between the top of the driveable base and the coverable movable base. The position of the dripping device corresponds to that of the fiber sample.

[0008] In one embodiment, the horizontal base is a rectangular base, and a strip groove is provided on the upper surface of the horizontal base along the length direction. A guide rail is provided in the strip groove along the length direction. A transmission screw support is fixedly provided at the end of the horizontal base away from the vertical support. The position of the transmission base and the enclosing movable base on the horizontal base is adjusted by sliding on the guide rail.

[0009] A vertical mounting plate is provided at the top of the vertical support, and a mounting assembly for installing the dripping device is provided on the vertical mounting plate.

[0010] In one embodiment, the mounting assembly includes an upper cylinder fixing block, a middle cylinder fixing block, a vertical slide rail, fastening bolts, clamping blocks, and tightening nuts.

[0011] The upper cylinder fixing block, the middle cylinder fixing block, and the vertical slide are arranged sequentially from top to bottom on the vertical mounting plate. The clamping block is slidably set on the vertical slide. The fastening bolts lock the clamping block on the vertical slide. The dripping device is locked by the upper cylinder fixing block, the middle cylinder fixing block, and the clamping block.

[0012] Specifically, the functions of each component are as follows: the upper cylinder fixing block, the middle cylinder fixing block, and the clamping block are used to place the dripping device, tighten the nut to fix the dripping device, control the position of the clamping block through the vertical slide, and fix it with fastening bolts.

[0013] In one embodiment, the dripping device includes, from top to bottom, a knob cap, an upper cylinder of the knob body, a middle cylinder of the knob body, a screw, a graduated sleeve, and a probe; the upper end of the upper cylinder of the knob body is connected to the knob cap and forms a sleeve with the middle cylinder of the knob body, and can move on the middle cylinder of the knob body; the middle cylinder of the knob body is provided with a backlash-free nut formed by an internally threaded cylinder and a spring sleeved outside the internally threaded cylinder; the upper end of the screw is connected to the upper cylinder of the knob body and the knob cap in sequence through the backlash-free nut; the lower end of the screw passes through the threaded holes on the upper cylinder fixing block and the middle cylinder fixing block; the end of the screw extends into the graduated sleeve and is connected to the piston of the graduated sleeve; the top of the probe is connected to the bottom of the graduated sleeve.

[0014] The outer wall of the clamping block is provided with a vertically arranged positioning groove for placing the graduated sleeve. The clamping block is locked in the positioning groove by tightening the nut.

[0015] Specifically, during operation, the substrate is placed inside the graduated sleeve and the graduated sleeve is fixed. Since the graduated sleeve and probe are commercial products, they are easy to replace and have low cost. By rotating the knob cap, the movement of the screw in the upper and middle cylinders of the knob body is changed, thereby changing the position of the screw in the graduated sleeve. Furthermore, the volume of substrate flowing into the probe inside the graduated sleeve can be precisely controlled by rotating the knob cap.

[0016] In one embodiment, the transducible base includes a clamping plate adjusting screw, an upper clamping plate, a lower clamping plate, a movable base, and a linear drive mechanism; the movable base is slidably mounted on a horizontal base, and the linear drive mechanism drives the movable base to reciprocate on the horizontal base; the lower clamping plate is fixed to the top of the movable base; the upper clamping plate is height-adjustable above the lower clamping plate via the clamping plate adjusting screw, and a gap is formed between the upper and lower clamping plates for clamping one end of the fiber sample.

[0017] In one embodiment, the linear drive mechanism includes a transmission screw, a threaded hole, a first guide rail hole, and a rotary drive mechanism; the threaded hole is disposed on the movable base and engages with the transmission screw, the first guide rail hole is disposed at the bottom of the movable base, the guide rail and the first guide rail hole are slidably engaged, the rotary drive mechanism is connected to the transmission screw, and a threaded pair engaging with the transmission screw is disposed on the transmission screw support.

[0018] In one embodiment, the rotary drive mechanism includes a drive motor or a manual drive mechanism, wherein the manual drive mechanism is a crank handle disposed at the other end of the drive screw, which is located away from the movable base.

[0019] Specifically, during operation, one end of the sample with the test paper clamp is placed on the lower clamp of the movable base, the upper clamp is moved to clamp the sample, and it is fixed by the clamp adjustment screw. The movable base can change the position of the transmission screw by turning the rocker arm on the guide rail through the first guide rail hole.

[0020] In one embodiment, the enclosed movable base includes a sample tightening nut, a sample placement groove, an enclosed movable base, a second guide rail hole, and a locking handle. The bottom of the enclosed movable base is provided with a sliding groove that slides onto a horizontal base. The sliding groove on the horizontal base is locked onto the horizontal base by the locking handle. The sample placement groove is located at the top of the enclosed movable base. One end of the fiber sample is locked in the sample placement groove by the sample tightening nut. The second guide rail hole is located at the bottom of the sliding groove and slides with the guide rail.

[0021] Specifically, during operation, the fiber sample is placed in the sample placement slot and secured by the sample tightening nut. The sample placement slot is fixed on the enclosed movable base and its position is changed by the enclosed movable base. The enclosed movable base can move along the horizontal base and its position is fixed by the locking handle.

[0022] In one embodiment, the fiber sample includes a fiber and a test paper clamp disposed at one end of the fiber. The test paper clamp is located between an upper clamp and a lower clamp. The end of the fiber away from the test paper clamp is engaged with a sample placement groove. The matrix in the dripping device is dripped onto the surface of the fiber to form a composite material.

[0023] A second aspect of the present invention provides a method for using a test specimen preparation mechanism, which employs the above-described mechanism for preparing a fiber composite material interfacial bonding strength test specimen, and includes the following steps:

[0024] S1. Place the end of the fiber sample without the test paper clamp into the sample placement slot and secure it with the sample tightening nut. Determine its position by adjusting the distance on the enveloping movable base on the guide rail inside the horizontal base, and fix it with the locking handle.

[0025] S2. Place the end of the fiber sample with the test paper clamp on the lower clamping plate of the enclosed movable base, move the upper clamping plate to clamp the sample, fix the upper and lower clamping plates by adjusting the clamping plate screw, and turn the rocker arm to change the position of the movable base on the horizontal base by changing the position of the transmission screw.

[0026] S3. Install the dripping device on the stand, and place the upper cylinder of the knob body and the middle cylinder of the knob body on the upper cylinder fixing block and the middle cylinder fixing block respectively to determine the initial position of the dripping device;

[0027] S4. Place the graduated sleeve into the positioning groove of the clamping block, move the clamping block to the position on the vertical slide, rotate the fastening bolt to fix the clamping block, and determine the precise position of the dripping device.

[0028] S5. Turn the knob cap to push the screw down inside the graduated sleeve, extruding a precisely sized matrix drop onto the surface of the fiber sample to form a composite material.

[0029] The beneficial effects of this invention are as follows:

[0030] 1. Using the device and method provided by this invention, fiber samples can be precisely positioned via a driveable base and a covered movable base, while the dripping device can accurately control the matrix volume to prepare composite materials. This mechanism reduces sample preparation errors, lowers costs, and improves the accuracy of interfacial strength performance testing.

[0031] 2. The dripping device places the substrate into the graduated sleeve. Since the graduated sleeve and probe are commercial products, they are easy to replace and have low cost. By rotating the knob cap, the movement of the screw in the upper and middle cylinders of the knob body is changed, thereby changing the position of the screw in the graduated sleeve. The volume of substrate flowing into the probe in the graduated sleeve can be precisely controlled by rotating the knob cap. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a test specimen preparation mechanism for interfacial bonding strength of fiber composite materials according to the present invention.

[0034] Figure 2 This is a schematic diagram of the structure of a transducer base.

[0035] Figure 3 This is a schematic diagram of the structure of the enclosed movable base.

[0036] Figure 4 This is a structural diagram of the test bench.

[0037] Figure 5 This is a schematic diagram of the dripping device.

[0038] Figure 6 This is a schematic diagram of the structure when the upper and lower clamping plates are fitted with the fiber sample.

[0039] Figure 7 This is a partial structural diagram of the dripping device.

[0040] Reference numerals: 1. Transmissible base; 2. Covered movable base; 3. Stand; 4. Drip device; 5. Fiber sample;

[0041] 1-1. Clamping plate adjusting screw; 1-2. Upper clamping plate; 1-3. Lower clamping plate; 1-4. Movable base; 1-5. Transmission screw; 1-6. First guide rail hole; 1-7. Crank handle;

[0042] 2-1. Sample tightening nut; 2-2. Sample placement slot; 2-3. Enveloping movable base; 2-4. Second guide rail hole; 2-5. Locking handle;

[0043] 3-1. Upper cylinder fixing block; 3-2. Middle cylinder fixing block; 3-3. Vertical slide rail; 3-4. Fastening bolt; 3-5. Clamping block; 3-6. Tightening nut; 3-7. Vertical bracket; 3-8. Guide rail; 3-9. Horizontal base; 3-10. Transmission screw support seat;

[0044] 4-1. Knob cap; 4-2. Upper cylinder of knob body; 4-3. Middle cylinder of knob body; 4-4. Screw; 4-5. Scale sleeve; 4-6. Probe;

[0045] 5-1. Fiber; 5-2. Test paper clip; 5-3. Composite material. Detailed Implementation

[0046] To make the technical problems, technical solutions, and technical effects of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention 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 the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0048] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0049] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention 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. Therefore, they should not be construed as limiting the present invention.

[0050] Example 1

[0051] like Figures 1 to 7 As shown, this embodiment provides a mechanism for preparing a fiber composite material interfacial bonding strength test sample, including a driveable base 1, a covered movable base 2, a stand 3, a dripping device 4, and a fiber sample;

[0052] The stand includes a horizontal base 3-9 and a vertical support 3-7 set at one end of the horizontal base 3-9. The driveable base 1 and the coverable movable base 2 are both slidably set on the horizontal base 3-9. The dripping device 4 is installed on the vertical support 3-7. The fiber sample 5 is installed between the top of the driveable base 1 and the coverable movable base 2. The dripping device 4 corresponds to the position of the fiber sample 5.

[0053] Example 2

[0054] This embodiment is a further optimization based on Embodiment 1, specifically:

[0055] The horizontal base 3-9 is a rectangular base. A strip groove is provided on the upper surface of the horizontal base 3-9 along the length direction. A guide rail 3-8 is provided in the strip groove along the length direction. A transmission screw support seat 3-10 is fixedly provided at the end of the horizontal base 3-9 away from the vertical support 3-7. The position of the transmission base 1 and the enclosing movable base 2 on the horizontal base 3-9 is adjusted by sliding on the guide rail 3-8.

[0056] A vertical mounting plate is provided on the top of the vertical bracket 3-7, and a mounting assembly for installing the drip device 4 is provided on the vertical mounting plate.

[0057] The mounting components include an upper cylinder fixing block 3-1, a middle cylinder fixing block 3-2, a vertical slide rail 3-3, fastening bolts 3-4, a clamping block 3-5, and a tightening nut 3-6.

[0058] The upper cylinder fixing block 3-1, the middle cylinder fixing block 3-2, and the vertical slide 3-3 are arranged sequentially from top to bottom on the vertical mounting plate. The clamping block 3-5 is slidably arranged on the vertical slide 3-3. The fastening bolt 3-4 locks the clamping block 3-5 on the vertical slide 3-3. The dripping device 4 is locked by the upper cylinder fixing block 3-1, the middle cylinder fixing block 3-2, and the clamping block 3-5.

[0059] Specifically, the functions of each component are as follows: the upper cylinder fixing block 3-1, the middle cylinder fixing block 3-2 and the clamping block 3-5 are used to place the dripping device 4, the nut 3-6 is tightened to fix the dripping device 4, the position of the clamping block 3-5 is controlled by the vertical slide 3-3 and fixed by the fastening bolt 3-4.

[0060] Example 3

[0061] This embodiment is a further optimization based on embodiment 2, specifically:

[0062] The drip device 4 includes, from top to bottom, a knob cap 4-1, a knob body upper cylinder 4-2, a knob body middle cylinder 4-3, a screw 4-4, a scale sleeve 4-5, and a probe 4-6. The upper end of the knob body upper cylinder 4-2 is connected to the knob cap 4-1 and forms a sleeve with the knob body middle cylinder 4-3, allowing it to move on the knob body middle cylinder 4-3. The knob body middle cylinder 4-3 is provided with a backlash-free nut formed by an internally threaded cylinder and a spring sleeved outside the internally threaded cylinder. The upper end of the screw 4-4 is connected to the knob body upper cylinder 4-2 and the knob cap 4-1 in sequence through the backlash-free nut. The lower end of the screw 4-4 passes through the threaded holes on the upper cylinder fixing block 3-1 and the middle cylinder fixing block 3-2. The end of the screw 4-4 extends into the scale sleeve 4-5 and connects with the piston of the scale sleeve 4-5. The top of the probe 4-6 is connected to the bottom of the scale sleeve 4-5.

[0063] The clamping block 3-5 has a vertically positioned positioning groove on its outer side wall for placing the graduated sleeve 4-5. The clamping block 3-5 is locked in the positioning groove by tightening the nut 3-6.

[0064] Specifically, during operation, the substrate is placed inside the graduated sleeve 4-5 and the graduated sleeve 4-5 is fixed. Since the graduated sleeve 4-5 and the probe 4-6 are commercial products, they are easy to replace and have low cost. By rotating the knob cap 4-1, the movement of the screw in the upper cylinder 4-2 and the middle cylinder 4-3 of the knob body is changed, thereby changing the position of the piston driven by the screw 4-4 inside the graduated sleeve 4-5. The volume of the substrate flowing into the probe 4-6 inside the graduated sleeve 4-5 can be precisely controlled by rotating the knob cap 4-1.

[0065] Example 4

[0066] This embodiment is a further optimization based on embodiment 3, specifically:

[0067] The transmissive base 1 includes a clamping plate adjusting screw 1-1, an upper clamping plate 1-2, a lower clamping plate 1-3, a movable base 1-4, and a linear drive mechanism. The movable base 1-4 is slidably mounted on a horizontal base 3-9. The linear drive mechanism drives the movable base 1-4 to reciprocate on the horizontal base 3-9. The lower clamping plate 1-3 is fixed to the top of the movable base 1-4. The upper clamping plate 1-2 is height-adjustable above the lower clamping plate 1-3 via the clamping plate adjusting screw 1-1. A gap is formed between the upper clamping plate 1-2 and the lower clamping plate 1-3 for clamping one end of the fiber sample 5.

[0068] The linear drive mechanism includes a transmission screw 1-5, a threaded hole, a first guide rail hole 1-6, and a rotary drive mechanism. The threaded hole is provided on the movable base 1-4 and engages with the transmission screw 1-5. The first guide rail hole 1-6 is provided at the bottom of the movable base 1-4. The guide rail 3-8 is slidably engaged with the first guide rail hole 1-6. The rotary drive mechanism is connected to the transmission screw 1-5. The transmission screw support 3-10 is provided with a threaded pair that engages with the transmission screw 1-5.

[0069] The rotary drive mechanism includes a drive motor or a manual drive mechanism. The manual drive mechanism is a rocker handle 1-7, which is located at the other end of the movable base 1-4 away from the transmission screw 1-5.

[0070] Specifically, during operation, one end of the sample with the test paper clamp is placed on the lower clamping plate 1-3 of the movable base 1-4, the upper clamping plate 1-2 is moved to clamp the sample, and it is fixed by the clamping plate adjusting screw 1-1. The movable base 1-4 can change the position of the transmission screw 1-5 by rotating the rocker handle 1-7 on the guide rail through the first guide rail hole 1-6.

[0071] Example 5

[0072] This embodiment is a further optimization based on embodiment 4, specifically:

[0073] The enclosed movable base 2 includes a sample tightening nut 2-1, a sample placement groove 2-2, an enclosed movable base 2-3, a second guide rail hole 2-4, and a locking handle 2-5. The bottom of the enclosed movable base 2-3 is provided with a sliding groove that slides onto the horizontal base 3-9. The sliding groove on the horizontal base 3-9 is locked onto the horizontal base 3-9 by the locking handle 2-5. The sample placement groove 2-2 is located at the top of the enclosed movable base 2-3. One end of the fiber sample 5 is locked in the sample placement groove 2-2 by the sample tightening nut 2-1. The second guide rail hole 2-4 is located at the bottom of the sliding groove and slides with the guide rail 3-8.

[0074] Specifically, during operation, the fiber sample 5 is placed in the sample placement slot 2-2 and secured by the sample tightening nut 2-1. The sample placement slot 2-2 is fixed on the enclosing movable base 2-3 and its position is changed by the enclosing movable base 2-3. The enclosing movable base 2-3 can move along the horizontal base 3-9 and its position is fixed by the locking handle 2-5.

[0075] The fiber sample 5 includes a fiber 5-1 and a test paper clamp 5-2 disposed at one end of the fiber 5-1. The test paper clamp 5-2 is located between the upper clamp 1-2 and the lower clamp 1-3. The end of the fiber 5-1 away from the test paper clamp 5-2 is engaged with the sample placement groove 2-2. The matrix in the dripping device 4 is dripped onto the surface of the fiber 5-1 to form a composite material 5-3.

[0076] Example 6

[0077] This embodiment provides a method for using a test sample preparation mechanism. The mechanism, described above, for preparing a fiber composite material interfacial bonding strength test sample includes the following steps:

[0078] S1. Place the end of the fiber sample 5 without the test paper clip into the sample placement slot 2-2 and reinforce it with the sample tightening nut 2-1. Determine its position by adjusting the distance on the enveloping movable base 2-3 on the guide rail 3-8 inside the horizontal base 3-9, and fix it with the locking handle 2-5.

[0079] S2. Place the end of the fiber sample 5 with the test paper clamp on the lower clamping plate 1-3 of the covering movable base 2-3, move the upper clamping plate 1-2 to clamp the sample, fix the upper clamping plate 1-2 and the lower clamping plate 1-3 by adjusting the clamping plate screw 1-1, and turn the rocker handle 1-7 to change the position of the movable base 1-4 on the horizontal base 3-9 by the transmission screw 1-5.

[0080] S3. Install the dripping device 4 on the stand 3, and place the upper cylinder 4-2 of the knob body and the middle cylinder 4-3 of the knob body on the upper cylinder fixing block 3-1 and the middle cylinder fixing block 3-2 respectively to determine the initial position of the dripping device 4.

[0081] S4. Place the graduated sleeve 4-5 into the positioning groove of the clamping block 3-5, move the clamping block 3-5 to the position on the vertical slide 3-3, rotate the fastening bolt 3-4 to fix the clamping block 3-5, and determine the precise position of the dripping device 4.

[0082] S5. Rotate the knob cap 4-1 to push the screw 4-4 downward within the graduated sleeve 4-5, extruding a precisely sized matrix drop onto the surface of the fiber sample 5 to form the composite material 5-3.

Claims

1. A mechanism for preparing a test specimen for interfacial bonding strength of fiber composite materials, characterized in that, It includes a driveable base (1), a covered movable base (2), a stand (3), a dripping device (4), and a fiber sample (5); The stand (3) includes a horizontal base (3-9) and a vertical support (3-7) disposed at one end of the horizontal base (3-9). The driveable base (1) and the enclosed movable base (2) are both slidably disposed on the horizontal base (3-9). The dripping device (4) is installed on the vertical support (3-7). The fiber sample (5) is installed between the top of the driveable base (1) and the enclosed movable base (2). The dripping device (4) is positioned corresponding to the fiber sample (5). The horizontal base (3-9) is a rectangular base. A strip groove is provided on the upper surface of the horizontal base (3-9) along the length direction. A guide rail (3-8) is provided in the strip groove along the length direction. A transmission screw support seat (3-10) is fixedly provided at the end of the horizontal base (3-9) away from the vertical support (3-7). The position of the transmission base (1) and the enclosed movable base (2) on the horizontal base (3-9) is slidably adjusted by the guide rail (3-8). A vertical mounting plate is provided on the top of the vertical support (3-7), and an installation component for installing the dripping device (4) is provided on the vertical mounting plate; The installation assembly includes an upper cylinder fixing block (3-1), a middle cylinder fixing block (3-2), a vertical slide rail (3-3), a fastening bolt (3-4), a clamping block (3-5), and a tightening nut (3-6). The upper cylinder fixing block (3-1), the middle cylinder fixing block (3-2), and the vertical slide (3-3) are arranged sequentially from top to bottom on the vertical mounting plate. The clamping block (3-5) is slidably arranged on the vertical slide (3-3). The fastening bolt (3-4) locks the clamping block (3-5) on the vertical slide (3-3). The dripping device (4) passes through the upper cylinder fixing block (3-1), the middle cylinder fixing block (3-2), and the clamping block (3-5) in sequence and is locked by tightening the nut (3-6). The dripping device (4) includes, from top to bottom, a knob cap (4-1), an upper cylinder of the knob body (4-2), a middle cylinder of the knob body (4-3), a screw (4-4), a scale sleeve (4-5), and a probe (4-6). The upper end of the upper cylinder of the knob body (4-2) is connected to the knob cap (4-1) and forms a sleeve with the middle cylinder of the knob body (4-3), allowing it to move on the middle cylinder of the knob body (4-3). The middle cylinder of the knob body (4-3) is provided with an internally threaded cylinder and a screw sleeve fitted on the internally threaded cylinder. The spring outside the grooved cylinder forms a backlash-free nut. The upper end of the screw (4-4) is connected to the upper cylinder (4-2) of the knob body and the knob cap (4-1) in sequence through the backlash-free nut. The lower end of the screw (4-4) passes through the threaded holes on the upper cylinder fixing block (3-1) and the middle cylinder fixing block (3-2). The end of the screw (4-4) extends into the scale sleeve (4-5) and is connected to the piston of the scale sleeve (4-5). The top of the probe (4-6) is connected to the bottom of the scale sleeve (4-5). The clamping block (3-5) has a vertically arranged positioning groove on its outer side wall for placing the scale sleeve (4-5), and the clamping block (3-5) is locked in the positioning groove by tightening the nut (3-6); The transmittable base (1) includes a clamping plate adjusting screw (1-1), an upper clamping plate (1-2), a lower clamping plate (1-3), a movable base (1-4), and a linear drive mechanism; the movable base (1-4) is slidably disposed on the horizontal base (3-9), and the linear drive mechanism drives the movable base (1-4) to reciprocate on the horizontal base (3-9); the lower clamping plate (1-3) is fixed on the top of the movable base (1-4); the upper clamping plate (1-2) is disposed above the lower clamping plate (1-3) with adjustable height via the clamping plate adjusting screw (1-1); and a gap is formed between the upper clamping plate (1-2) and the lower clamping plate (1-3) for clamping one end of the fiber sample (5). The enclosed movable base (2) includes a sample tightening nut (2-1), a sample placement groove (2-2), an enclosed movable base (2-3), a second guide rail hole (2-4), and a locking handle (2-5). The bottom of the enclosed movable base (2-3) is provided with a sliding groove that slides onto the horizontal base (3-9). The sliding groove on the horizontal base (3-9) is locked onto the horizontal base (3-9) by the locking handle (2-5). The sample placement groove (2-2) is located at the top of the enclosed movable base (2-3). One end of the fiber sample (5) is locked in the sample placement groove (2-2) by the sample tightening nut (2-1). The second guide rail hole (2-4) is located at the bottom of the sliding groove and slides with the guide rail (3-8).

2. The mechanism for preparing a fiber composite interfacial bonding strength test specimen according to claim 1, characterized in that, The linear drive mechanism includes a transmission screw (1-5), a threaded hole, a first guide rail hole (1-6), and a rotary drive mechanism. The transmission screw support (3-10) is provided with a threaded hole that mates with the transmission screw (1-5). The threaded hole is located on the movable base (1-4) and mates with the transmission screw (1-5). The first guide rail hole (1-6) is located at the bottom of the movable base (1-4). The guide rail (3-8) is slidably engaged with the first guide rail hole (1-6). The rotary drive mechanism is connected to the transmission screw (1-5).

3. The mechanism for preparing a fiber composite interfacial bonding strength test specimen according to claim 2, characterized in that, The rotary drive mechanism includes a drive motor or a manual drive mechanism. The manual drive mechanism is a rocker handle (1-7), which is located at the other end of the transmission screw (1-5) away from the movable base (1-4).

4. The mechanism for preparing a fiber composite material interfacial bonding strength test specimen according to claim 3, characterized in that, The fiber sample (5) includes a fiber (5-1) and a test paper clamp (5-2) disposed at one end of the fiber (5-1). The test paper clamp (5-2) is located between the upper clamp (1-2) and the lower clamp (1-3). The end of the fiber (5-1) away from the test paper clamp (5-2) is engaged with the sample placement groove (2-2). The matrix in the dripping device (4) is dripped onto the surface of the fiber (5-1) to form a composite material (5-3).

5. A method for using a test specimen preparation mechanism, comprising the mechanism for preparing a fiber composite material interfacial bonding strength test specimen according to any one of claims 1 to 4, characterized in that, Includes the following steps: S1. Place the end of the fiber sample (5) without the test paper clamp into the sample placement slot (2-2) and reinforce it with the sample tightening nut (2-1). Determine its position by adjusting the distance on the cover-type movable base (2-3) on the guide rail (3-8) in the horizontal base (3-9) and fix it with the locking handle (2-5). S2. Place the end of the fiber sample (5) with the test paper clamp on the lower clamp (1-3) of the covering movable base (2-3), move the upper clamp (1-2) to clamp the sample, fix the upper clamp (1-2) and the lower clamp (1-3) by adjusting the clamp screw (1-1), and turn the rocker handle (1-7) to make the transmission screw (1-5) change the position of the movable base (1-4) on the horizontal base (3-9); S3. Install the dripping device (4) on the stand (3), and place the upper cylinder (4-2) and the middle cylinder (4-3) of the knob body on the upper cylinder fixing block (3-1) and the middle cylinder fixing block (3-2) respectively to determine the initial position of the dripping device (4); S4. Place the graduated sleeve (4-5) into the positioning groove of the clamping block (3-5), move the clamping block (3-5) to the position on the vertical slide (3-3), rotate the fastening bolt (3-4) to fix the clamping block (3-5), and determine the precise position of the dripping device (4). S5. Rotate the knob cap (4-1) to push the screw (4-4) down inside the graduated sleeve (4-5) to extrude a precisely sized matrix drop onto the surface of the fiber sample (5) to form a composite material (5-3).

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