Lap joint shear sample preparation tool

Abstract

The utility model discloses a lap joint shear sample preparation tool which comprises a first base, first check blocks are arranged on the two sides of the upper surface of the first base, a first installation groove is defined between the two first check blocks and the upper surface of the first base, and the first installation groove is used for installing a first sample to be bonded; the second base is arranged opposite to the first base, second check blocks are arranged on the two sides of the upper surface of the second base, a second mounting groove is defined between the two second check blocks and the upper surface of the second base, and a second to-be-bonded sample is mounted in the second mounting groove; the first cover plate covers the two first check blocks so as to press the first to-be-bonded sample, after the first to-be-bonded sample and the second to-be-bonded sample are bonded together through the adhesive, a sample preparation worker can use a scraper blade and other tools to scrape off overflowing glue in a bonding area, and therefore rapid sample preparation of the lap joint shear sample is achieved, the sample preparation quality is guaranteed, and meanwhile the sample preparation efficiency is improved. And the sample preparation efficiency is also improved.

Description

Technical Field

[0001] The utility model relates to the field of lap shear performance testing, in particular to a lap shear test specimen preparation tool. Background Art

[0002] When performing tensile shear tests on adhesive samples in accordance with methods such as GB / T7124-2008, it is necessary to apply the adhesive to be cured on the overlapped area of ​​the sample to measure the tensile shear strength of the adhesive. Due to the bonding process requirements of the adhesive, it is necessary to apply the adhesive on the overlapped position of the sample at room temperature, apply a certain pressure after overlapping the two samples, and cure them at a certain temperature before they can be used for testing. In traditional sample preparation methods, most of them use isolation tape to isolate the non-bonded area, and then coat the bonding area. After coating, use hard silk threads and other items to maintain the thickness of the bonding area, and use dovetail clamps to clamp the bonding area. This method is simple and easy to operate, but it is generally only suitable for adhesives that are liquid at room temperature or adhesives with good shaping ability. In the adhesive pasting process, since the adhesive needs to be bonded before curing, and the uncured silicone rubber adhesive at room temperature (such as GD414, which is colloid at room temperature) is not sticky or has poor viscosity, at this time, it is necessary to use some method to fix the sample. Although the traditional method is feasible, during the bonding process, since the adhesive is in a soft state and cannot be shaped, the thickness of the bonding area cannot be accurately controlled, and overflow will occur when pressure is applied. It is impossible to guarantee the size and thickness of the bonding area, and it is impossible to ensure that there is enough adhesive to fully cover the bonding area, resulting in unsatisfactory sample bonding quality. In addition, different testers use different sample preparation methods, and different proficiency levels make the final positioning effect of the sample uncontrollable. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a lap shear specimen preparation tool, which can simplify the bonding process and facilitate the test personnel to bond the specimen, thereby ensuring the bonding quality of the lap shear specimen and improving the test accuracy.

[0004] According to an embodiment of the utility model, a lap shear specimen preparation tool comprises: a first base, first blocks are arranged on both sides of the upper surface of the first base, a first installation groove is defined between the two first blocks and the upper surface of the first base, and the first installation groove is used to install a first sample to be bonded; a second base is arranged opposite to the first base, second blocks are arranged on both sides of the upper surface of the second base, a second installation groove is defined between the two second blocks and the upper surface of the second base, and the second installation groove is used to install a second sample to be bonded; a first cover plate is arranged on the two first blocks for pressing The first sample to be bonded is held; a second cover plate is covered on the two second stoppers and is used to press the second sample to be bonded; wherein one end of the first sample to be bonded is flush with the side wall of the first base away from the second base, and the other end of the first sample to be bonded extends between the first base and the second base; one end of the second sample to be bonded is flush with the side wall of the second base away from the first base, and the other end of the second sample to be bonded extends between the first base and the second base, and the other end of the first sample to be bonded is bonded to the other end of the second sample to be bonded by an adhesive.

[0005] A lap shear specimen preparation tool according to an embodiment of the utility model has at least the following beneficial effects: by arranging the first mounting groove and the second mounting groove on the upper surface of the first base and the second base, and arranging the first stopper and the second stopper on both sides of the first mounting groove and the second mounting groove, the first specimen to be bonded and the second specimen to be bonded can be installed in the first mounting groove and the second mounting groove, and fixed by the first stopper and the second stopper, so that the installation and fixation of the specimens become more convenient; and, the first specimen to be bonded and the second specimen to be bonded are pressed by the first cover plate and the second cover plate to prevent the first specimen to be bonded and the second specimen to be bonded from moving, further ensuring that the bonding areas of the two can be aligned, thereby simplifying the bonding process and facilitating the test personnel to bond the specimens, thereby ensuring the bonding quality of the lap shear specimens to a certain extent and improving the test accuracy. Moreover, since the bonding areas of the first sample to be bonded and the second sample to be bonded are both located outside the first base and the second base, after the first sample to be bonded and the second sample to be bonded are bonded together by the adhesive, the sample preparation personnel can use tools such as scrapers to scrape off the overflowed glue in the bonding area, thereby realizing rapid sample preparation of lap shear samples, which ensures the sample preparation quality and improves the sample preparation efficiency.

[0006] According to some embodiments of the utility model, the first cover plate includes a first top plate and a first boss, the first boss is arranged on the lower surface of the first top plate, the first top plate covers the upper surfaces of the two first blocks, the first boss is located in the first mounting groove between the two first blocks, and is used to press the first sample to be bonded; the second cover plate includes a second top plate and a second boss, the second boss is arranged on the lower surface of the second top plate, the second top plate covers the upper surfaces of the two second blocks, the second boss is located in the second mounting groove between the two second blocks, and is used to press the second sample to be bonded.

[0007] According to some embodiments of the utility model, a first threaded hole is provided on the upper surface of the first stopper, and a second threaded hole matching the first threaded hole is provided on the first top plate; a third threaded hole is provided on the upper surface of the second stopper, and a fourth threaded hole matching the third threaded hole is provided on the second top plate.

[0008] According to some embodiments of the utility model, the first base includes a first supporting seat and a first mounting seat, the first mounting seat is arranged on the first supporting seat, the first blocks are arranged on both sides of the upper surface of the first mounting seat, and the first mounting groove is formed between the two first blocks and the upper surface of the first mounting seat; the second base includes a second supporting seat and a second mounting seat, the second mounting seat is arranged on the second supporting seat, the second blocks are arranged on both sides of the upper surface of the second mounting seat, and the second mounting groove is formed between the two second blocks and the upper surface of the second mounting seat.

[0009] According to some embodiments of the present invention, the first support seat and the first mounting seat are integrally formed; the second support seat and the second mounting seat are integrally formed.

[0010] According to some embodiments of the present invention, one end of the first stopper is flush with the side wall of the first base away from the second base, and the other end of the first stopper extends between the first base and the other end of the first sample to be bonded; one end of the second stopper is flush with the side wall of the second base away from the first base, and the other end of the second stopper extends between the second base and the other end of the second sample to be bonded.

[0011] According to some embodiments of the present invention, the first stop block is integrally formed with the first base, and the second stop block is integrally formed with the second base.

[0012] According to some embodiments of the utility model, a first through hole is formed on the side wall of the first stopper, and the first through holes of the two first stoppers are arranged opposite to each other; a second through hole is formed on the side wall of the second stopper, and the second through holes of the two second stoppers are arranged opposite to each other.

[0013] According to some embodiments of the present invention, the bottom of the first base is padded with a gasket of preset thickness, or the bottom of the second base is padded with the gasket of preset thickness.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 Schematic diagram of the lap shear specimen preparation tooling of the utility model embodiment Figure 1 ;

[0017] Figure 2 Schematic diagram of the lap shear specimen preparation tooling of the utility model embodiment Figure 2 ;

[0018] Figure 3 for Figure 2 An exploded view of the lap shear specimen preparation tool is shown;

[0019] Figure 4 for Figure 1 A schematic diagram of the structure of the base is shown.

[0020] A first base 100, a first stopper 110, and a first threaded hole 111;

[0021] The second threaded hole 112, the first through hole 113, and the first mounting groove 120;

[0022] A first support seat 130, a first mounting seat 140, and a gasket 150;

[0023] A second base 200, a second stopper 210, and a third threaded hole 211;

[0024] The fourth threaded hole 212, the second through hole 213, and the second mounting groove 220;

[0025] A second supporting seat 230 and a second mounting seat 240;

[0026] A first cover plate 300, a first top plate 310, and a first boss 320;

[0027] A second cover plate 400, a second top plate 410, and a second boss 420;

[0028] A first sample 500 to be bonded and a second sample 600 to be bonded. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "more" is two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Reference Figures 1 to 4A lap shear specimen preparation tool, comprising: a first base 100, a second base 200, a first cover plate 300 and a second cover plate 400; the first base 100 and the second base 200 are arranged opposite to each other, first blocks 110 are arranged on both sides of the upper surface of the first base 100, a first installation groove 120 is defined between the two first blocks 110 and the upper surface of the first base 100, and the first installation groove 120 is used to install a first sample 500 to be bonded; second blocks 210 are arranged on both sides of the upper surface of the second base 200, and the two second blocks 210 A second mounting groove 220 is defined between the first base 100 and the upper surface of the second base 200, and the second mounting groove 220 is used to install the second sample 600 to be bonded; the first cover plate 300 is covered on the two first stoppers 110, and is used to press the first sample 500 to be bonded; the second cover plate 400 is covered on the two second stoppers 210, and is used to press the second sample 600 to be bonded; wherein one end of the first sample 500 to be bonded is flush with the side wall of the first base 100 away from the second base 200, and the other end of the first sample 500 to be bonded extends to the first base 100 and the second base 2 00; one end of the second sample 600 to be bonded is flush with the side wall of the second base 200 away from the first base 100, the other end of the second sample 600 to be bonded extends between the first base 100 and the second base 200, and the other end of the first sample 500 to be bonded is bonded to the other end of the second sample 600 to be bonded by an adhesive, the first base 100 and the second base 200 are symmetrically arranged on the left and right sides, respectively used to clamp and fix the first sample 500 to be bonded and the second sample 600 to be bonded, the front and rear sides of the upper surface of the first base 100 A first stopper 110 is provided, and a first mounting groove 120 is formed between the two first stoppers 110 and the upper surface of the first base 100. The first mounting groove 120 is used to place the first sample 500 to be bonded, and the first stoppers 110 on both sides are used to prevent the first sample 500 to be bonded from moving in the first mounting groove 120; the left end of the first sample 500 to be bonded is flush with the left side wall of the first base 100, and the right end of the first sample 500 to be bonded extends all the way to the outside of the right side wall of the first base 100, and is located between the first base 100 and the second base 200.After the first sample 500 to be bonded is placed in the first mounting groove 120, the first cover plate 300 can be covered on the upper surfaces of the two first stoppers 110, so that the first sample 500 to be bonded is clamped between the bottom surface of the first cover plate 300 and the upper surface of the first base 100, thereby fixing the first sample 500 to be bonded; it can be understood that similarly, the second base 200 is provided with second stoppers 210 on both the front and rear sides of the upper surface, and the space between the two second stoppers 210 and the second base The upper surface of 200 forms a second mounting groove 220, and the second mounting groove 220 is used to place the second sample 600 to be bonded, and the second stoppers 210 on both sides are used to prevent the second sample 600 to be bonded from moving in the second mounting groove 220; the right end of the second sample 600 to be bonded is flush with the right side wall of the second base 200, and the left end of the second sample 600 to be bonded extends to the outside of the left side wall of the second base 200 until it can contact the right end of the first sample 500 to be bonded. After the second sample 600 to be bonded is placed in the second mounting groove 220, the second cover plate 400 can be covered on the upper surfaces of the two second stoppers 210, so that the second sample 600 to be bonded is clamped between the bottom surface of the second cover plate 400 and the upper surface of the second base 200, so as to fix the second sample 600 to be bonded. Finally, adhesive can be applied to the bonding area at the right end of the first sample 500 to be bonded or the bonding area at the left end of the second sample 600 to be bonded, and after the bonding area of ​​the first sample 500 to be bonded is aligned with the bonding area of ​​the second sample 600 to be bonded, the two can be bonded together by the adhesive. By providing the first mounting groove 120 and the second mounting groove 220 on the upper surfaces of the first base 100 and the second base 200, and providing the first stoppers 110 and the second stoppers 210 on the front and rear sides of the first mounting groove 120 and the second mounting groove 220, the first sample 500 to be bonded and the second sample 600 to be bonded can be bonded together. The installation and fixation of the two samples 600 to be bonded become more convenient; moreover, the first cover plate 300 and the second cover plate 400 press the first sample 500 to be bonded and the second sample 600 to be bonded to prevent the first sample 500 to be bonded and the second sample 600 to be bonded from moving, further ensuring that the bonding areas of the two can be aligned, thereby simplifying the bonding process and facilitating the test personnel to bond the samples, thereby ensuring the bonding quality of the overlap shear sample to a certain extent and improving the test accuracy. Since the bonding areas of the first sample 500 to be bonded and the second sample 600 to be bonded are both located outside the first base 100 and the second base 200, after the first sample 500 to be bonded and the second sample 600 to be bonded are bonded by the adhesive, the sample preparation personnel can use tools such as scrapers to scrape off the overflow glue in the bonding area, thereby realizing the rapid sample preparation of the overlap shear sample, ensuring the sample preparation quality while also improving the sample preparation efficiency.

[0034] Reference Figure 1The first cover plate 300 includes a first top plate 310 and a first boss 320, the first boss 320 is arranged on the lower surface of the first top plate 310, the first top plate 310 is covered on the upper surfaces of the two first blocks 110, the first boss 320 is located in the first mounting groove 120 between the two first blocks 110, and is used to press the first sample 500 to be bonded; the second cover plate 400 includes a second top plate 410 and a second boss 420, the second boss 420 is arranged on the lower surface of the second top plate 410, the second top plate 410 is covered on the upper surfaces of the two second blocks 210, the second boss 420 is located in the second mounting groove 220 between the two second blocks 210, and is used to press the second sample 600 to be bonded. The first boss 320 is located in the middle area of ​​the lower surface of the first top plate 310, and the front and rear sides of the first top plate 310 protrude from the front and rear sides of the first boss 320. The size of the first boss 320 is adapted to the size of the first mounting groove 120, so that when the first top plate 310 is covered on the upper surfaces of the two first stoppers 110, the first boss 320 can be located between the two first stoppers 110, and the first sample to be bonded 500 in the first mounting groove 120 is pressed tightly. It can be understood that In the embodiment, the second boss 420 is located in the middle area of ​​the lower surface of the second top plate 410, and the front and rear sides of the second top plate 410 protrude from the front and rear sides of the second boss 420. The size of the second boss 420 is adapted to the size of the second mounting groove 220, so that when the second cover plate 400 is covered on the upper surfaces of the two second blocks 210, the second boss 420 can be located between the two second blocks 210 to press the second sample 600 to be bonded in the second mounting groove 220.

[0035] Reference Figure 4The first stopper 110 is provided with a first threaded hole 111 on its upper surface, and the first top plate 310 is provided with a second threaded hole 112 matched with the first threaded hole 111; the second stopper 210 is provided with a third threaded hole 211 on its upper surface, and the second top plate 410 is provided with a fourth threaded hole 212 matched with the third threaded hole 211. Specifically, the upper surfaces of the two first stoppers 110 are provided with a first threaded hole 111, and two second threaded holes 112 matched with the two first threaded holes 111 are provided at corresponding positions of the first top plate 310. When the first top plate 310 is covered on the upper surfaces of the two first stoppers 110, bolts can be screwed into the first threaded hole 111 and the second threaded hole 112, thereby fixing the first cover plate 300 and the first stopper 110, and allowing the first cover plate 300 to press the first sample 500 to be bonded, which can be rationally It is understood that, similarly, the upper surfaces of the two second blocks 210 are each provided with a third threaded hole 211, and two fourth threaded holes 212 matched with the two third threaded holes 211 are provided at corresponding positions of the second top plate 410. When the second top plate 410 is covered on the upper surfaces of the two second blocks 210, bolts can be screwed into the third threaded holes 211 and the fourth threaded holes 212, thereby fixing the second cover plate 400 and the second block 210, and allowing the second cover plate 400 to press the second sample 600 to be bonded.

[0036] Reference Figure 1The first base 100 includes a first supporting seat 130 and a first mounting seat 140, the first mounting seat 140 is arranged on the first supporting seat 130, and first blocks 110 are arranged on both sides of the upper surface of the first mounting seat 140, and a first mounting groove 120 is defined between the two first blocks 110 and the upper surface of the first mounting seat 140; the second base 200 includes a second supporting seat 230 and a second mounting seat 240, the second mounting seat 240 is arranged on the second supporting seat 230, and second blocks 210 are arranged on both sides of the upper surface of the second mounting seat 240, and a second mounting groove 220 is defined between the two second blocks 210 and the upper surface of the second mounting seat 240. Specifically, it should be noted that the first mounting seat 140 and the first supporting seat 130 form an L-shape, the first mounting seat 140 is vertically arranged on the first supporting seat 130, the first supporting seat 130 is placed on the workbench, and plays the role of supporting the first mounting seat 140, and the upper surface of the first mounting seat 140 is used to define the first mounting groove 120, so that the first sample to be bonded 500 can be placed. It can be understood that the second mounting seat 240 and the second supporting seat 230 form an L-shape, the second mounting seat 240 is vertically arranged on the second supporting seat 230, the second supporting seat 230 is placed on the workbench, and plays the role of supporting the second mounting seat 240, and the upper surface of the second mounting seat 240 is used to define the second mounting groove 220, so that the second sample to be bonded 600 can be placed. Among them, the first supporting seat 130 and the first mounting seat 140 can be integrally formed, and the second supporting seat 230 and the second mounting seat 240 can also be integrally formed.

[0037] Reference Figure 1 One end, i.e. the left end, of the first stopper 110 is flush with the side wall, i.e. the left side wall, of the first base 100 away from the second base 200, and the other end, i.e. the right end, of the first stopper 110 extends between the first base 100 and the other end, i.e. the right end, of the first sample 500 to be bonded; one end, i.e. the right end, of the second stopper 210 is flush with the side wall, i.e. the right side wall, of the second base 200 away from the first base 100, and the other end, i.e. the left end, of the second stopper 210 extends between the second base 200 and the other end, i.e. the right end, of the second sample 600 to be bonded. Since the first stopper 110 extends to the outside of the upper surface of the first base 100 and the second stopper 210 extends to the outside of the upper surface of the second base 200, a larger area of ​​the first sample 500 and the second sample 600 to be bonded can be fixed, ensuring that the first sample 500 and the second sample 600 to be bonded are more stable. It should be noted that the first stopper 110 and the first base 100 can be integrally formed, and the second stopper 210 and the second base 200 can also be integrally formed.

[0038] In some embodiments, a first through hole 113 is provided on the side wall of the first stopper 110, and the first through holes 113 of the two first stoppers 110 are arranged opposite to each other; a second through hole 213 is provided on the side wall of the second stopper 210, and the second through holes 213 of the two second stoppers 210 are arranged opposite to each other. The first through hole 113 is located on the side wall of the upper surface portion of the first stopper 110 extending out of the first base 100, and the second through hole 213 is located on the side wall of the upper surface portion of the second stopper 210 extending out of the second base 200. It should be noted that after the first sample 500 to be bonded is placed inside the first mounting groove 120, the first sample 500 to be bonded can be clamped by setting bolts in the two first through holes 113, and after the second sample 600 to be bonded is placed inside the second mounting groove 220, the second sample 600 to be bonded can be clamped by setting bolts in the two second through holes 213.

[0039] In some embodiments, the bottom of the first base 100 is padded with a gasket 150 of a preset thickness, or the bottom of the second base 200 is padded with the gasket 150 of a preset thickness. When the first sample 500 to be bonded and the second sample 600 to be bonded are bonded by adhesive, it is necessary to form a bonding area of ​​a required thickness on the surfaces of the first sample 500 to be bonded and the second sample 600 to be bonded. By padding the gasket 150 of a certain thickness at the bottom of the first base 100 or the second base 200, a height difference can be created between the surfaces of the first sample 500 to be bonded and the second sample 600 to be bonded, and adhesive is coated in the area between the height difference, thereby satisfying the bonding area of ​​the required thickness.

[0040] According to the lap shear specimen preparation tooling of the embodiment of the utility model, the problem of being unable to position the lap length, thickness, parallelism and coaxiality generated during the sample preparation process can be avoided; at the same time, providing an open environment in the bonding area also avoids the problem of being unable to clean up excess colloid and difficult demolding after using molds and other tooling to prepare samples, which can not only ensure the accuracy of the test, but also improve the sample preparation efficiency.

[0041] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A lap shear specimen preparation tool, characterized in that: include: A first base (100), wherein first blocks (110) are provided on both sides of an upper surface of the first base (100), and a first installation groove (120) is defined between the two first blocks (110) and the upper surface of the first base (100), and the first installation groove (120) is used to install a first sample (500) to be bonded; A second base (200) is arranged opposite to the first base (100), and second blocks (210) are arranged on both sides of the upper surface of the second base (200), and a second installation groove (220) is defined between the two second blocks (210) and the upper surface of the second base (200), and the second installation groove (220) is used to install a second sample (600) to be bonded; A first cover plate (300), which is disposed on the two first stoppers (110) and is used to press the first sample to be bonded (500); A second cover plate (400) is disposed on the two second stoppers (210) and is used to press the second sample to be bonded (600); One end of the first sample to be bonded (500) is flush with the side wall of the first base (100) away from the second base (200), and the other end of the first sample to be bonded (500) extends between the first base (100) and the second base (200); one end of the second sample to be bonded (600) is flush with the side wall of the second base (200) away from the first base (100), and the other end of the second sample to be bonded (600) extends between the first base (100) and the second base (200), and the other end of the first sample to be bonded (500) and the other end of the second sample to be bonded (600) are bonded by an adhesive.

2. The lap shear specimen preparation tool according to claim 1, characterized in that: The first cover plate (300) comprises a first top plate (310) and a first boss (320), wherein the first boss (320) is arranged on the lower surface of the first top plate (310), the first top plate (310) covers the upper surfaces of the two first stoppers (110), the first boss (320) is located in the first mounting groove (120) between the two first stoppers (110), and is used to press the first sample to be bonded (500); the second cover plate (400) comprises a second top plate (410) and a second boss (420), the second boss (420) is arranged on the lower surface of the second top plate (410), the second top plate (410) covers the upper surfaces of the two second stoppers (210), the second boss (420) is located in the second mounting groove (220) between the two second stoppers (210), and is used to press the second sample to be bonded (600).

3. The lap shear specimen preparation tool according to claim 2, characterized in that: The upper surface of the first stopper (110) is provided with a first threaded hole (111), and the first top plate (310) is provided with a second threaded hole (112) adapted to the first threaded hole (111); the upper surface of the second stopper (210) is provided with a third threaded hole (211), and the second top plate (410) is provided with a fourth threaded hole (212) adapted to the third threaded hole (211).

4. The lap shear specimen preparation tool according to claim 1, characterized in that: The first base (100) comprises a first supporting base (130) and a first mounting base (140), wherein the first mounting base (140) is arranged on the first supporting base (130), and the first stoppers (110) are arranged on both sides of the upper surface of the first mounting base (140), and the first mounting groove (120) is formed between the two first stoppers (110) and the upper surface of the first mounting base (140); the second base (200) comprises a second supporting base (230) and a second mounting base (240), and the second mounting base (240) is arranged on the second supporting base (230), and the second stoppers (210) are arranged on both sides of the upper surface of the second mounting base (240), and the second mounting groove (220) is formed between the two second stoppers (210) and the upper surface of the second mounting base (240).

5. The lap shear specimen preparation tool according to claim 4, characterized in that: The first support seat (130) and the first mounting seat (140) are integrally formed, and the second support seat (230) and the second mounting seat (240) are integrally formed.

6. The lap shear specimen preparation tool according to claim 1, characterized in that: One end of the first stopper (110) is flush with a side wall of the first base (100) away from the second base (200), and the other end of the first stopper (110) extends between the first base (100) and the other end of the first sample (500) to be bonded; one end of the second stopper (210) is flush with a side wall of the second base (200) away from the first base (100), and the other end of the second stopper (210) extends between the second base (200) and the other end of the second sample (600) to be bonded.

7. The lap shear specimen preparation tool according to claim 6, characterized in that: The first stopper (110) and the first base (100) are integrally formed, and the second stopper (210) and the second base (200) are integrally formed.

8. The lap shear specimen preparation tool according to claim 1, characterized in that: A first through hole (113) is formed on the side wall of the first stopper (110), and the first through holes (113) of the two first stoppers (110) are arranged opposite to each other; a second through hole (213) is formed on the side wall of the second stopper (210), and the second through holes (213) of the two second stoppers (210) are arranged opposite to each other.

9. The lap shear specimen preparation tool according to claim 1, characterized in that: The bottom of the first base (100) is padded with a gasket (150) of a preset thickness, or the bottom of the second base (200) is padded with the gasket (150) of a preset thickness.

Images