Auxiliary sample bonding tool for core material tensile shear test

Abstract

The utility model relates to an auxiliary sample bonding tool for a core material tensile shear test. Comprising a bottom plate, vertical plates are arranged on the two side edges of the bottom plate in the length direction, a jackscrew used for abutting against a bonding plate is installed on at least one vertical plate in a penetrating mode, positioning plates used for being in matched butt joint with a groove in one end of the bonding plate are arranged between the two vertical plates at intervals, and a moving gap used for moving of the bonding plate is formed between the two positioning plates. Through the structural design of the sample auxiliary bonding tool, the problems that in the prior art, when a core material and a testing tool are fixed in a manual bonding mode, the centering precision is low, the parallelism of two bonding plates and an adhesive layer are not uniform, visual adjustment depends on operators, strict parallelism of a sample and the stress axis of the tool is difficult to guarantee, and the working efficiency is high are solved. And the stress distribution is not uniform.

Description

Technical Field

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

[0002] Fiber-reinforced composite materials are currently considered the only structural materials capable of solving infrastructure corrosion problems and achieving long service life and high performance, leading to their rapid development in the automotive, aerospace, and wind power industries. Simultaneously, with the continuous expansion of the composite materials field, the application range of sandwich structures is also constantly expanding. The key to designing composite sandwich structures is selecting a suitable core material. Tensile-shear testing is a crucial indicator for core material selection.

[0003] like Figure 1 As shown, in existing methods, two adhesive plates 5 are first bonded to opposite sides of the sample 7 with adhesive before testing. After curing, material mechanics testing is performed. However, in material mechanics testing, the data dispersion of core material tensile and shear tests has always been a significant factor affecting test accuracy. Studies have shown that this phenomenon is not only related to the non-uniformity of the material itself, but more importantly, traditional core material testing methods suffer from significant tooling-sample alignment deviations. Current testing procedures typically use manual bonding to fix the core material and testing tooling, which has inherent drawbacks including:

[0004] 1) The centering accuracy is low, relying on visual adjustment by the operator, making it difficult to ensure that the sample is strictly parallel to the force axis of the tooling, resulting in uneven stress distribution;

[0005] 2) Poor curing stability: the adhesive may cause slight displacement of the sample during the curing process, which further aggravates data fluctuations;

[0006] 3) Insufficient repeatability: the coefficient of variation of tests conducted by different operators or batches seriously affects the reliability of the data.

[0007] Therefore, in order to address the above problems, this utility model urgently needs to provide a sample auxiliary bonding fixture for core material tensile shear testing. Utility Model Content

[0008] The purpose of this utility model is to provide a sample auxiliary bonding fixture for core material tensile shear testing. The design of the sample auxiliary bonding fixture structure solves the technical problems in the prior art, which involve fixing the core material and the test fixture by manual bonding, resulting in low centering accuracy, uneven parallelism of the two bonding plates, uneven adhesive layer, reliance on visual adjustment by the operator, difficulty in ensuring strict parallelism between the force axis of the sample and the fixture, and uneven stress distribution.

[0009] This utility model provides a sample auxiliary bonding fixture for core material tensile shear testing, including a base plate, with upright plates on both sides of the base plate along its length, wherein at least one upright plate is fitted with a top screw for abutting the bonding plate, and a positioning plate is provided between the two upright plates for matching and engaging with a groove at one end of the bonding plate, and a moving gap is provided between the two positioning plates for moving the bonding plate.

[0010] Furthermore, the height of the positioning plate is less than the depth of the groove in the adhesive plate.

[0011] Furthermore, multiple weight-reducing elongated holes are spaced apart on the base plate located at the movement gap.

[0012] Furthermore, two top screws are spaced apart on one of the upright plates.

[0013] Furthermore, the thickness of the upright plate is greater than the thickness of the base plate.

[0014] Furthermore, the base plate, upright plate, and positioning plate are all made of metal.

[0015] Furthermore, the base plate is square in shape.

[0016] Furthermore, the distance between the outer edge of each positioning plate and the outer edge of the adjacent base plate is 5-10cm.

[0017] Furthermore, the distance between the outer edge of each upright plate and the outer edge of the adjacent bottom plate is 5-10cm.

[0018] Furthermore, the base plate, positioning plate, and upright plate are integrally formed.

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

[0020] 1. The auxiliary bonding fixture for core material tensile shear testing provided by this utility model includes a base plate, with upright plates on both sides along the length of the base plate for limiting and reinforcing. Positioning plates are spaced between the two upright plates for mating with grooves at one end of the bonding plates. A movement gap is provided between the two positioning plates for moving the bonding plates. After the test sample is bonded to the two bonding plates, the grooves at one end of each bonding plate align with the positioning plates, achieving positioning of the bonding plates. The bonding plates can slide linearly along the positioning plates on the base plate without displacement. The other end of the bonding plates can move freely within the movement gap. The auxiliary bonding fixture for the test sample is precisely centered. High precision ensures the parallelism of the bonding plate and the uniformity of the adhesive layer, eliminating the need for visual adjustments by operators. It guarantees strict parallelism between the sample and the force axis of the tooling, resulting in uniform stress distribution. Multiple test samples can be placed simultaneously. After placement, a set screw is threaded onto the upright plate and tightened. One end of the set screw abuts against the bonding plate and applies pressure. Through the push of the set screw, the bonding force is precisely controlled, ensuring uniform force and preventing sample damage or weak adhesion due to uneven force. Excess adhesive is squeezed out, improving the accuracy and consistency of sample bonding, ensuring the reliability of test results, simplifying the operation process, and improving work efficiency.

[0021] 2. This utility model uses a sample-assisted bonding tooling structure design. The tooling design fully considers the convenience of subsequent operations, such as glue collection, handling and sampling, which significantly improves work efficiency and reduces the difficulty of operation.

[0022] 3. The sample auxiliary bonding fixture provided by this utility model has multiple weight-reducing elongated holes spaced apart on the base plate, which can reduce the weight of the base plate and facilitate handling. Attached Figure Description

[0023] 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.

[0024] Figure 1 A structural diagram showing the existing adhesive plate bonded to the sample as a single unit;

[0025] Figure 2 This is the auxiliary bonding fixture for core material tensile shear testing as described in this utility model.

[0026] Figure 3 This is an assembly diagram of the auxiliary bonding fixture and bonding plate for core material tensile shear testing as described in this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Base plate; 2. Vertical plate; 3. Positioning plate; 4. Top screw; 5. Adhesive plate; 6. Weight-reducing elongated hole; 7. Sample. Detailed Implementation

[0029] 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.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] 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.

[0032] like Figure 2 , Figure 3 As shown in the figure, this embodiment provides a sample auxiliary bonding fixture for core material tensile shear testing, including a base plate 1, with upright plates 2 provided on both sides of the base plate 1 along the length direction, wherein at least one upright plate 1 is fitted with a top screw 4 for abutting the bonding plate, and a positioning plate for matching and engaging with a groove at one end of the bonding plate is provided between the two upright plates 2, and a moving gap is provided between the two positioning plates 3 for moving the bonding plate.

[0033] This utility model provides a sample auxiliary bonding fixture for core material tensile shear testing, comprising a base plate 1, with upright plates 2 on both sides along the length of the base plate 1 for limiting and reinforcing. Positioning plates 3 are spaced apart between the two upright plates 2 for matching and engaging with grooves at one end of the bonding plates. A movement gap is provided between the two positioning plates 3 for moving the bonding plates. After the test sample is bonded to the two bonding plates 5, the grooves at one end of each bonding plate 5 engage with the positioning plates, achieving positioning of the bonding plates 5. The bonding plates 5 can slide linearly along the positioning plates 3 on the base plate without displacement. The other end of the bonding plates 5 can move freely within the movement gap. With high centering precision, it ensures the parallelism of the bonding plate and the uniformity of the adhesive layer, eliminating the need for visual adjustments by operators. It guarantees strict parallelism between the sample and the force axis of the tooling, resulting in uniform stress distribution. Multiple test samples can be placed simultaneously. After the test samples are placed, the set screw 4 is threaded onto the upright plate 1 and tightened. One end of the set screw 4 abuts against the bonding plate and applies a certain pressure. Through the push of the set screw 4, the bonding force can be precisely controlled, ensuring uniform force and avoiding sample damage or weak bonding caused by uneven force. Excess adhesive is squeezed out, which improves the accuracy and consistency of sample bonding, ensures the reliability of test results, simplifies the operation process, and improves work efficiency.

[0034] like Figure 3 As shown, in this embodiment, the height of the positioning plate 3 is less than the depth of the groove of the adhesive plate 5, ensuring that the bottom surface of the adhesive plate located at the moving gap is in complete contact with the base plate, thus ensuring support for the adhesive plate.

[0035] like Figure 2 As shown, the base plate 1 located at the moving gap is provided with multiple weight-reducing elongated holes 6 at intervals to reduce the weight of the base plate 1 and facilitate glue collection.

[0036] In this invention, two top screws 4 are spaced apart on one of the vertical plates 2 to ensure the symmetry of the extrusion, to ensure the pushing force on the adhesive plate 5, to ensure uniform force distribution, and to squeeze out excess adhesive.

[0037] The thickness of the upright plate 2 of this invention is greater than the thickness of the base plate 1, which ensures the overall rigidity without increasing the overall weight too much.

[0038] The base plate 1, the upright plate 2, and the positioning plate 3 of this utility model are all made of metal.

[0039] The base plate 1 of this utility model is square in shape.

[0040] The distance between the outer edge of each positioning plate 3 and the outer edge of the adjacent base plate 1 is 5-10cm.

[0041] The distance between the outer edge of each upright plate 2 and the outer edge of the adjacent bottom plate 1 is 5-10cm.

[0042] The base plate 1, positioning plate 3 and upright plate 2 of this utility model are integrally formed.

[0043] Specific usage instructions for auxiliary bonding fixtures for core material tensile shear testing:

[0044] 1. Apply a release agent coating to base plate 1 for subsequent operations;

[0045] 2. Using adhesive, the two adhesive plates 5 are bonded together with the sample to obtain an assembly; the two adhesive plates 5 are located on both sides of the sample, clamping the sample, with one end of the grooved adhesive plate 5 away from the sample, such as... Figure 3 As shown;

[0046] 3. For example Figure 3 As shown, the assembly is placed on the base plate 1, and the grooves of each adhesive plate 5 are aligned with the positioning plate 3 to achieve the positioning of the adhesive plate 5, thus pushing the assembly to fit tightly against the side of the upright plate 2 away from the top screw.

[0047] 4. Repeat steps 2 and 3 to place 5 assemblies;

[0048] 5. Tighten the set screw 4 to ensure even force distribution, squeeze out excess adhesive, and use a scraper to remove excess adhesive;

[0049] 6. Move the base plate and place it in the oven to cure;

[0050] 7. After curing, loosen the top screw 4, remove the 5 assemblies, and perform mechanical tests on each one.

[0051] 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. A specimen-aided bonding fixture for core material tensile shear testing, characterized in that: Includes a base plate (1), and upright plates (2) are provided on both sides along the length direction of the base plate (1). At least one upright plate (2) is fitted with a top screw (4) for abutting the adhesive plate. A positioning plate for matching and engaging with the groove at one end of the adhesive plate is provided between the two upright plates (2). A moving gap for moving the adhesive plate is provided between the two positioning plates (3).

2. The specimen auxiliary bonding fixture for core material tensile shear testing according to claim 1, characterized in that: The height of the positioning plate (3) is less than the depth of the groove of the adhesive plate (5).

3. The specimen auxiliary bonding fixture for core material tensile shear testing according to claim 1, characterized in that: Multiple weight-reducing elongated holes (6) are spaced apart on the base plate (1) located at the moving gap.

4. The specimen auxiliary bonding fixture for core material tensile shear testing according to claim 1, characterized in that: Two top screws (4) are threaded at intervals on one of the upright plates (2).

5. The specimen auxiliary bonding fixture for core material tensile shear testing according to claim 1, characterized in that: The thickness of the upright plate (2) is greater than the thickness of the bottom plate (1).

6. The specimen auxiliary bonding fixture for core material tensile shear testing according to claim 1, characterized in that: The base plate (1), the upright plate (2) and the positioning plate (3) are all made of metal.

7. The specimen auxiliary bonding fixture for core material tensile shear testing according to claim 1, characterized in that: The base plate (1) is square in shape.

8. The specimen auxiliary bonding fixture for core material tensile shear testing according to claim 1, characterized in that: The distance between the outer edge of each positioning plate (3) and the outer edge of the adjacent base plate (1) is 5-10cm.

9. The specimen auxiliary bonding fixture for core material tensile shear testing according to claim 1, characterized in that: The distance between the outer edge of each upright plate (2) and the outer edge of the adjacent bottom plate (1) is 5-10cm.

10. The specimen auxiliary bonding fixture for core material tensile shear testing according to claim 1, characterized in that: The base plate (1), positioning plate (3) and upright plate (2) are integrally formed.

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