Bonding tool for tensile test of core material

Abstract

The utility model relates to the technical field of core material tensile sample preparation, in particular to a bonding tool for a core material tensile test, which comprises a vertically arranged plate-shaped base, a lower clamping plate is horizontally and detachably mounted on the front side surface of the base, and an upper clamping plate is arranged above the lower clamping plate at an interval; a plurality of upper limiting grooves are formed in the lower surface of the upper clamping plate at intervals, and lower limiting grooves in one-to-one correspondence with the upper limiting grooves are formed in the upper surface of the lower clamping plate at intervals; the upper clamping plate and the lower clamping plate are fixed through a plurality of interval adjusting devices which are arranged at intervals; by means of the structural design of the detachable base, the upper clamping plate, the lower clamping plate and the distance adjusting device, the problems that in the prior art, in the preparation process of core material tensile samples, the core material tensile samples are not aligned easily, and the needed storage space is large are solved.

Description

Technical Field

[0001] This utility model relates to the field of core material tensile specimen preparation technology, and in particular to an adhesive tooling for core material tensile testing. Background Technology

[0002] Composite sandwich structures have advantages such as light weight, high strength, heat insulation and wave absorption. With proper design, they can significantly improve structural strength and reduce structural weight, thus leading to their rapid development in the automotive industry, aerospace, wind power generation and other fields. However, selecting a suitable core material is a key step in preparing high-performance composite sandwich structures. Therefore, the evaluation of the mechanical properties of the core material is of great significance. Among them, tensile testing is an important indicator for core material selection.

[0003] During core material tensile testing, the test results among samples in the same group often differ greatly. This is not only related to the differences in the samples themselves, but more importantly, it is constrained by the manufacturing precision of the core material tensile test specimens. In traditional testing methods, due to the lack of an effective positioning device, it is difficult to ensure that the axis of the core material sample and the test fixture are completely coincident, resulting in uneven stress distribution, which affects the accuracy and repeatability of the test results and reduces the reliability of the data.

[0004] Currently, the common method for preparing core tensile test specimens is to manually bond the test fixture to the sample using adhesive. However, this method of alignment by hand is not accurate enough and depends on the operator's skill, so misalignment often occurs. Moreover, during the curing process of the adhesive, the lack of a positioning device may cause slight displacement of the sample, resulting in the specimen not meeting the standard. This can lead to twisting during the tensile process, causing data deviation.

[0005] For example, Chinese patent CN220251481U provides a bonding fixture for core material tensile testing, which mainly discloses a base plate with multiple positioning grooves spaced apart for positioning core material components. The base plate also has limiting screw holes spaced apart circumferentially along each positioning groove, and limiting screws are screwed into each limiting screw hole. It also includes a pressure plate that passes through each limiting screw. However, the following problems exist: First, there is a possibility of uneven output pressure among the hydraulic cylinders. When the output pressure is uneven, the limiting screws and pressure plates will be stuck when they pass through. Second, when it is not necessary to prepare core material tensile test specimens, the above fixture cannot be completely disassembled into multiple plates and screws, which is inconvenient for storage.

[0006] Therefore, in order to address the above problems, this utility model urgently needs to provide an adhesive tooling for core material tensile testing. Utility Model Content

[0007] The purpose of this invention is to provide an adhesive fixture for core material tensile testing. The fixture is designed with a detachable base, upper clamping plate, lower clamping plate, and spacing adjustment device to solve the problems of misalignment and large storage space required in the preparation of core material tensile specimens in the prior art.

[0008] An adhesive fixture for core material tensile testing includes a vertically arranged plate-shaped base, a lower clamping plate that is horizontally and detachably installed on the front side of the base, and an upper clamping plate spaced above the lower clamping plate; the lower surface of the upper clamping plate is provided with a plurality of upper limit grooves spaced apart, and the upper surface of the lower clamping plate is provided with lower limit grooves that correspond one-to-one with each upper limit groove.

[0009] The upper and lower clamping plates are fixed together by multiple spaced-apart adjustment devices.

[0010] Furthermore, the spacing adjustment device is a screw, which passes through the upper clamping plate and the lower clamping plate and is then screwed and fixed to a nut.

[0011] Furthermore, the base has multiple fastening holes that penetrate the base along its length, and each fixing screw passes through the fastening hole and is screwed to the lower clamping plate.

[0012] Furthermore, the spacing adjustment devices are evenly distributed along the length of the upper clamping plate.

[0013] Furthermore, both the upper limit slot and the lower limit slot are rectangular.

[0014] Furthermore, each upper limit groove and each lower limit groove is a square with a side length of 50mm.

[0015] Furthermore, the front side of the base is coated with a release agent.

[0016] Furthermore, the front side of the base is provided with multiple height marking lines at height intervals.

[0017] Furthermore, each upper limit groove is equally spaced along the length of the upper clamping plate, and each lower limit groove is equally spaced along the length of the lower clamping plate.

[0018] Furthermore, the upper clamping plate has six upper limit grooves evenly distributed along its length, and the lower clamping plate has six lower limit grooves evenly distributed along its length.

[0019] The bonding fixture for core material tensile testing provided by this utility model has the following advantages compared with the prior art:

[0020] 1. This utility model provides an adhesive fixture for core material tensile testing, used to precisely align the testing fixture with the sample to be tested, and firmly fix the sample position during the adhesive curing process. This effectively solves the problems of inaccurate alignment and unstable fixation in existing technologies, thereby improving test accuracy. Through a unique positioning structure and adhesive method, precise alignment of the core material sample and the testing fixture is achieved, significantly improving the reliability and consistency of test data, increasing the precision of sample preparation, effectively reducing the dispersion of test data, and making sample preparation more standardized, providing a reliable guarantee for high-quality testing. At the same time, it simplifies the operation process and improves work efficiency. The upper and lower limiting grooves in this utility model can be machined according to the dimensions of the tensile fixture, ensuring that the entire sample is within the limiting grooves. Six samples can be prepared simultaneously, ensuring accurate sample positioning during the adhesive process, reducing deviations, and improving the reliability of test results. By controlling the tightening force or tightening distance of each screw, uniform force on each screw can be ensured, allowing for precise adjustment of the pressure during the adhesive process, avoiding sample damage or weak adhesion due to uneven force.

[0021] 2. In this utility model, the base, upper clamping plate, lower clamping plate, and spacing adjustment device are all detachable, so that they can be removed separately when not in use to form an assembly of multiple plates and multiple rods. This saves storage space. When needed, they can be assembled by simply connecting them with screws, making the operation simple. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram (front view) of the bonding fixture used for core material tensile testing as described in this utility model;

[0024] Figure 2 This is a schematic diagram (rear view) of the bonding fixture used for core material tensile testing as described in this utility model;

[0025] Figure 3 This is a schematic diagram (three-dimensional view) of the core material tensile specimen described in this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Nut; 2. Upper clamping plate; 3. Base; 4. Lower clamping plate; 5. Upper limit groove; 6. Lower limit groove; 7. Screw; 8. Fixing screw; 9. Tensile tooling; 10. Sample. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 limitations on this utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] like Figure 1 , Figure 2 As shown, the present invention provides an adhesive fixture for core material tensile testing, including a vertically arranged plate-shaped base 3, a lower clamping plate 4 horizontally and detachably installed on the front side of the base 3, and an upper clamping plate 2 spaced above the lower clamping plate 4; a plurality of upper limit grooves 5 are spaced on the lower surface of the upper clamping plate 2, and a lower limit groove 6 corresponding to each upper limit groove 5 is spaced on the upper surface of the lower clamping plate 4.

[0032] The upper clamping plate 2 and the lower clamping plate 4 are fixed by a plurality of spaced spacing adjustment devices.

[0033] 1. This utility model provides an adhesive fixture for core material tensile testing, used to precisely align the testing fixture with the sample to be tested, and firmly fix the sample position during the adhesive curing process. This effectively solves the problems of inaccurate alignment and unstable fixation existing in the prior art, thereby improving the accuracy of the test. Through a unique positioning structure and adhesive method, precise alignment of the core material sample and the testing fixture is achieved, significantly improving the reliability and consistency of the test data, increasing the preparation accuracy of the sample 10, effectively reducing the dispersion of the test data, making sample preparation more standardized, and providing a reliable guarantee for high-quality testing; at the same time, it simplifies the operation process and improves work efficiency. The upper limit groove 5 and lower limit groove 6 in the model can be machined according to the size of the tensile fixture, thereby ensuring that the upper and lower specimens 10 are fixed in the upper limit groove 5 and lower limit groove 6 respectively. At this time, by applying pressure vertically through each spacing adjustment device, it can be ensured that the pressure on each specimen 10 and the tensile fixture 9 is perpendicular to each bonding surface. Furthermore, six samples can be prepared simultaneously through multiple limit grooves, ensuring that the sample position is accurate during the bonding process, reducing deviations, and improving the reliability of test results. By controlling the tightening force or tightening distance of each screw 7 and nut 1, it can be ensured that each screw 7 is subjected to uniform force, and the pressure during the bonding process can be precisely adjusted to avoid sample damage or weak bonding due to uneven force.

[0034] 2. In this utility model, the base 3, upper clamping plate 2, lower clamping plate 4, and spacing adjustment device are all detachable, so that they can be removed separately when not in use to form an assembly of multiple plates and multiple rods. This saves storage space. When needed, they can be assembled by simply connecting them with screws, making the operation simple.

[0035] like Figure 1 As shown, the spacing adjustment device is a screw 7, which passes through the upper clamping plate 2 and the lower clamping plate 4 and is then screwed and fixed to the nut 1.

[0036] like Figure 2 As shown, the base 3 has multiple fastening holes that penetrate the base 3 along its length, and each fixing screw 8 passes through the fastening hole and is screwed to the lower clamping plate 4.

[0037] like Figure 1 As shown, the spacing adjustment devices are evenly distributed along the length of the upper clamping plate 2.

[0038] In this invention, by distributing the spacing adjustment devices at equal intervals, the pressure applied by the spacing adjustment devices to the upper clamping plate 2 and the lower clamping plate 4 can be uniformly controlled, ensuring that the tensile test specimens of each core material are subjected to uniform force and improving the accuracy of the test.

[0039] In this embodiment, both the upper limit slot 5 and the lower limit slot 6 are rectangular.

[0040] In this embodiment, each upper limit groove 5 and each lower limit groove 6 is a square with a side length of 50mm.

[0041] In this embodiment, the front side of the base 3 is coated with a release agent.

[0042] In this embodiment, the front side of the base 3 is provided with multiple height marking lines at height intervals.

[0043] In this invention, when pressure is applied to each test assembly by shortening the distance between the upper clamping plate 2 and the lower clamping plate 4, the position of the upper clamping plate 2 can be marked by each height marking line to avoid the upper clamping plate 2 from tilting during the pressure application process.

[0044] like Figure 1 As shown, each upper limit groove 5 is distributed at equal intervals along the length direction of the upper clamping plate 2, and each lower limit groove 6 is distributed at equal intervals along the length direction of the lower clamping plate 4.

[0045] like Figure 1 As shown, the upper clamping plate 2 has 6 upper limit grooves 5 evenly distributed along its length, and the lower clamping plate 4 has 6 lower limit grooves 6 evenly distributed along its length.

[0046] The embodiments of this utility model include the following steps:

[0047] 1) When the bonding fixture for core material tensile testing described in this utility model is required, the base 3 and the lower clamping plate 4 are assembled by fixing screws 8, and the upper clamping plate 2 and the lower clamping plate 4 are connected by the spacing adjustment device; the test assembly consisting of the sample 10 and the tensile fixture 9 is placed between the upper limit groove 5 and the lower limit groove 6, and the distance between the upper clamping plate 2 and the lower clamping plate 4 is gradually shortened by each spacing adjustment device, and each test assembly is uniformly pressurized. After curing, the core material tensile sample is obtained.

[0048] 2) When the tooling is not needed, remove each spacing adjustment device and unscrew the fixing screw 8 to obtain a combination of plate and rod consisting of spacing adjustment device, fixing screw 8, upper clamping plate 2, lower clamping plate 4, and base 3, which significantly reduces the storage space occupied by the tooling and makes it easier to store the tooling.

[0049] Example:

[0050] like Figure 1 , Figure 2As shown, this embodiment provides an adhesive fixture for core material tensile testing, including a vertically arranged plate-shaped base 3. A horizontal lower clamping plate 4 is detachably installed on the front side of the base 3 by fixing screws 8. An upper clamping plate 2 is arranged at intervals above the lower clamping plate 4. Multiple screws 7 are equally spaced between the upper clamping plate 2 and the lower clamping plate 4, and the other end of the screws 7 is screwed with nuts 1. Multiple upper limit grooves 5 are equally spaced on the lower surface of the upper clamping plate 2, and lower limit grooves 6 are equally spaced on the upper surface of the lower clamping plate 4, each corresponding to one of the upper limit grooves 5. Each upper limit groove 5 and each lower limit groove 6 is a square with a side length of 50mm.

[0051] For this example, the specific bonding method includes the following steps:

[0052] 1) Preparation: Before use, apply release agent evenly to the front side of base 3;

[0053] 2) Assembly fixture: Fix the base 3 to one side of the lower clamping plate 4 with fixing screws 8, then pass each screw 7 through the lower clamping plate 4 and the upper clamping plate 2 in sequence, and screw the nut 1 on the upper clamping plate 2.

[0054] 3) Preliminary bonding: Using a high-performance adhesive, a sample 10 is preliminarily bonded to the top and bottom of the tensile fixture 9 to obtain multiple test assemblies;

[0055] 4) Place the samples: Place each test assembly into the lower limit groove 6, so that within the same test assembly, the lower sample 10 is placed in the lower limit groove 6 and the upper sample 10 is placed in the upper limit groove 5.

[0056] 5) Apply pressure: Tighten each nut 1 and screw 7 in sequence to ensure that each test assembly is subjected to uniform force, squeeze out excess adhesive, and clean it with a scraper;

[0057] 6) Curing treatment: After bonding, the entire tooling is placed in an oven for curing. After curing, the sample is taken out for mechanical testing.

[0058] This invention can effectively improve the accuracy and consistency of sample bonding, ensure the reliability of test results, and simplify the operation process and improve work efficiency.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An adhesive bonding fixture for core material tensile testing, characterized in that: It includes a vertically arranged plate-shaped base (3), a lower clamping plate (4) is horizontally and detachably installed on the front side of the base (3), and an upper clamping plate (2) is arranged at intervals above the lower clamping plate (4); the lower surface of the upper clamping plate (2) is provided with multiple upper limit grooves (5) at intervals, and the upper surface of the lower clamping plate (4) is provided with lower limit grooves (6) that correspond one-to-one with each upper limit groove (5). The upper clamping plate (2) and the lower clamping plate (4) are fixed by a spacing adjustment device with multiple intervals.

2. The bonding fixture for core material tensile testing according to claim 1, characterized in that: The spacing adjustment device is a screw (7), which passes through the upper clamping plate (2) and the lower clamping plate (4) and is then screwed and fixed to the nut (1).

3. The bonding fixture for core material tensile testing according to claim 2, characterized in that: The base (3) has multiple fastening holes that penetrate the base (3) along its length, and each fixing screw (8) is screwed into the lower clamping plate (4) after passing through the fastening hole.

4. The bonding fixture for core material tensile testing according to claim 3, characterized in that: Each spacing adjustment device is evenly distributed along the length direction of the upper clamping plate (2).

5. The bonding fixture for core material tensile testing according to claim 4, characterized in that: Each upper limit slot (5) and each lower limit slot (6) is rectangular.

6. The bonding fixture for core material tensile testing according to claim 5, characterized in that: Each upper limit groove (5) and each lower limit groove (6) is a square with a side length of 50mm.

7. The bonding fixture for core material tensile testing according to claim 6, characterized in that: The front side of the base (3) is coated with a release agent.

8. The bonding fixture for core material tensile testing according to claim 7, characterized in that: The front side of the base (3) is provided with multiple height marking lines at height intervals.

9. The bonding fixture for core material tensile testing according to claim 8, characterized in that: Each upper limit groove (5) is evenly distributed along the length direction of the upper clamping plate (2), and each lower limit groove (6) is evenly distributed along the length direction of the lower clamping plate (4).

10. The bonding fixture for core material tensile testing according to claim 9, characterized in that: The upper clamping plate (2) has 6 upper limit grooves (5) evenly distributed along the length direction, and the lower clamping plate (4) has 6 lower limit grooves (6) evenly distributed along the length direction.

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