A tension test fixture

Abstract

The utility model relates to a kind of tension test tool, including bottom plate, and with the detachable connection cover plate of bottom plate, the accommodating space with accommodating product between the bottom plate with the cover plate, limit slot is equipped in the accommodating space, and at least part is placed in the pull head of limit slot and with the pull rod of detachable connection of pull head, still be equipped with when being in the pressure maintaining component of pressure maintaining state on the bottom plate and / or the cover plate press on the pull head.Optimal advantage is that: the scheme utilizes limit slot to ensure that test execution piece position is unified to guarantee data accuracy, and constant pressure is maintained by means of pressure maintaining component, so that pressure head can be fully fixed with product test area, solve the problem of unreliable test result caused by product fixation instability, test point variation and pressure attenuation in prior art.

Description

Technical Field

[0001] This utility model belongs to the field of testing fixtures, and in particular relates to a tensile testing fixture. Background Technology

[0002] In existing technologies, tensile testing fixtures lack specific limiting structures, making it impossible to unify the force application points of the test actuators, resulting in unstable test data. Furthermore, the lack of specific pressure plates or pressure-holding components makes it difficult to maintain constant pressure, causing the pull head and product to be loosely fixed, further affecting the accuracy and repeatability of test results. Utility Model Content

[0003] The purpose of this utility model is to provide a tensile testing fixture that can solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A tensile testing fixture includes a base plate and a cover plate detachably connected to the base plate. The base plate and the cover plate have a receiving space for accommodating a product. A limiting groove is provided in the receiving space, and a pull head and a pull rod detachably connected to the pull head are at least partially placed in the limiting groove. A pressure holding component is also provided on the base plate and / or the cover plate, which presses against the pull head when in a pressure holding state.

[0005] Furthermore, a number of limiting members are provided within the accommodating space, and each of the limiting members is connected to the inner wall of the accommodating space to form a limiting groove.

[0006] Furthermore, the top surface of the pull head protrudes beyond the top surface of the cover plate.

[0007] Furthermore, a fixing adhesive layer is provided on the end face of the pull head near the base plate.

[0008] Furthermore, the pressure-holding assembly includes a pressure-holding plate hinged to the cover plate and a pressure-holding buckle plate hinged to the cover plate. In the pressure-holding state, the pressure-holding buckle plate is fastened to the pressure-holding plate, such that the pressure-holding plate is at least partially always in contact with the pull head.

[0009] Furthermore, the pressure-holding buckle plate and the pressure-holding plate are connected by at least one elastic element, which is either a spring or an elastic plunger.

[0010] Furthermore, the end face of the pressure plate that contacts the pull head is provided with a pressure-holding adhesive layer.

[0011] Furthermore, a positioning component is provided between the base plate and the cover plate, with at least a portion of the positioning component located on the base plate and at least a portion of the positioning component located on the cover plate.

[0012] Furthermore, the positioning component includes a plurality of positioning posts disposed on either the base plate or the cover plate, and positioning holes corresponding to each positioning post.

[0013] Furthermore, the cover plate and the base plate are detachably connected by at least one fastener, snap-fit ​​connector, or threaded assembly.

[0014] Compared with existing technologies, the advantages of this application are as follows: This solution uses a limiting groove to ensure the uniformity of the test execution part position to ensure data accuracy, and uses a pressure holding component to maintain constant pressure so that the pressure head can be fully fixed with the product test area, thus solving the problems of unstable product fixation, test point variation and pressure decay caused by existing technologies and unreliable test results. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main assembly of a tensile testing fixture according to the present invention; Figure 2 Two schematic diagrams illustrating the main assembly of a tensile testing fixture according to this utility model; Figure 3 This is an exploded schematic diagram of the main body of a tensile testing fixture according to the present invention; Figure 4 This is a schematic diagram of the main assembly of the test execution component of this utility model.

[0016] In the figure, the components are: base plate 1, cover plate 2, test execution component 3, pull head 31, fixing adhesive layer 311, pull rod 32, limiting groove 4, limiting component 5, pressure holding component 6, pressure holding plate 61, pressure holding adhesive layer 611, pressure holding buckle plate 62, elastic element 63, and positioning component 7. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0018] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0021] Example 1

[0022] like Figures 1-3 As shown, a tensile testing fixture includes a base plate 1 and a cover plate 2 detachably connected to the base plate 1. A receiving space for accommodating a product is located between the base plate 1 and the cover plate 2, with the tested area of ​​the product exposed externally. A plurality of limiting members 5 are provided within the receiving space, and the limiting members 5 are connected to the inner wall of the receiving space to form a limiting groove 4. The tensile testing fixture also includes a test execution member 3, at least partially placed within the limiting groove 4. In this embodiment, the tested area of ​​the product is located below the limiting groove 4, and the test execution member 3 contacts the tested product within the limiting groove 4. Figure 4 As shown, the test execution component 3 includes a pull head 31 and a pull rod 32 detachably connected to the pull head 31. The pull head 31 is placed in a limiting groove 4, and the limiting groove 4 is contoured to the pull head 31 to ensure accurate positioning without deviation. A fixing adhesive layer 311 is provided on the end face of the pull head 31 near the base plate 1. In this embodiment, the fixing adhesive layer 311 is 8540 adhesive. The fixing adhesive layer 311 is used to bond and fix the product to the test area to ensure that there is no relative displacement between the pull head 31 and the product during the test. The end of the pull rod 32 is connected to an external tensioning device, and a tension force is applied in a direction perpendicular to the base plate 1. The tension force is transmitted to the pull head 31 through the pull rod 32, thereby performing a tensile test on the test area of ​​the product.

[0023] like Figure 2As shown, a pressure holding assembly 6 is also provided on the cover plate 2. The pressure holding assembly 6 is at least partially in contact with the test execution component 3. The pressure holding assembly 6 includes a pressure holding plate 61 and a pressure holding buckle plate 62. In the pressure holding state, the pressure holding buckle plate 62 abuts against the pressure holding plate 61, so that the pressure holding plate 61 is at least partially in contact with the pull head 31. The top surface of the pull head 31 protrudes from the top surface of the cover plate 2, so that the pressure holding plate 61 always fully abuts against all the pull heads 31 during the pressure holding process. The pressure holding assembly 6 provides downward pressure during the test process, which is directly applied to the upper surface of the pull head 31 through the pressure holding plate 61.

[0024] To further ensure the stability of the aforementioned pressure, at least one elastic element 63 is connected between the pressure-holding buckle 62 and the pressure-holding plate 61. The elastic element 63 can be either a spring or an elastic plunger. In this embodiment, the elastic element 63 is an elastic plunger, making the pressure applied by the pressure-holding plate 61 to the pull head 41 a dynamic and adaptive constant force. When the pressure-holding buckle 62 is locked, the elastic plunger is in a compressed state, and the rebound force it generates is continuously transmitted to the upper surface of the pull head 41 through the pressure-holding plate 61. At the same time, the end face of the pressure-holding plate 61 that contacts the pull head 31 is provided with a pressure-holding rubber layer 611, which is made of a flexible material. After the pull head 41 is initially positioned in the test area of ​​the product by fixing the rubber layer, the pressure generated by the elastic plunger 63 is evenly transmitted to the upper surface of all pull heads 41 through the pressure-holding plate 61 and the pressure-holding rubber layer 611.

[0025] A positioning component 7 is also provided between the cover plate 2 and the base plate 1. At least a portion of the positioning component 7 is located on the base plate 1, and at least a portion of the positioning component 7 is located on the cover plate 2. In this embodiment, the positioning component 7 includes a positioning post and a positioning hole. The positioning component 7 is used to ensure that the cover plate 2 and the base plate 1 can be quickly and accurately aligned when closed. Specifically, the positioning post is fixedly installed at a preset position on the base plate 1, and the corresponding positioning hole is set at the corresponding position on the cover plate 2. When the cover plate 2 is closed, the positioning post can be smoothly inserted into the positioning hole, thereby constraining the relative position of the two in the circumferential and radial directions, effectively preventing the cover plate 2 from shifting or rotating. At the same time, the cover plate 2 and the base plate 1 are detachably connected by at least one fastener, a snap-fit ​​connector, or a threaded assembly. The fastener is preferably a bolt or a knurled nut. This connection method can provide a stable and reliable locking force, ensuring the rigidity of the overall structure formed by the base plate 1 and the cover plate 2 during the test, preventing loosening or deformation due to force, thereby ensuring the stability of the test environment.

[0026] Example 2

[0027] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference lies in that, for the tensile testing fixture described in Embodiment 1, this embodiment describes the steps for using a tensile testing fixture.

[0028] First, place the base plate 1 stably on the workbench, ensuring it is stable and free from wobbling. Then, accurately place the product to be tested into the receiving space on the base plate 1, confirming that the area to be tested on the product is aligned with the limiting groove on the fixture. Next, lift the cover plate 2, aligning its positioning holes with the positioning pins 7 on the base plate 1, and slowly close the cover plate, ensuring the positioning assembly 7 is fully engaged, achieving initial precise positioning. Then, use knurled nuts or other manual fasteners to lock and secure the cover plate 2 to the base plate 1, thus firmly encapsulating the product inside the fixture.

[0029] After assembling the main tooling, take the slider 41, align the fixing adhesive layer at its lower end with the area to be tested on the product, and place each slider 41 into position one by one according to the guide of the upper limit groove of the cover plate 2, ensuring that the adhesive layer at the bottom of each slider 41 is in full and flat contact with the metal plate on the surface of the product. Next, perform the crucial pressure holding step: cover the slider 41 with the pressure holding plate 61 that has been placed in position, and operate the pressure holding buckle 62 to limit and lock it. At this time, the pressure holding plate 61 applies a uniform and stable downward pressure to all sliders 41 under the action of the elastic element 63. This state needs to be maintained for 24 hours to ensure that the fixing adhesive layer is fully cured and forms a strong and reliable bond.

[0030] After the adhesive layer has fully cured, the pressure-holding plate 62 can be released, and the pressure-holding plate 61 can be removed. Then, the tooling base 1, which has been integrated with the product, is securely installed onto the moving platform of the tensile testing machine using screws, and the moving platform itself is also rigidly connected and fixed to the push-pull force testing equipment. Afterward, the pull rod 42 and the corresponding pull head 41 are tightened with threads to form a complete test execution component.

[0031] Finally, adjust the testing equipment to ensure a reliable connection between the sensor connector of the tensile testing machine and the top of the tie rod 42, and complete the test.

[0032] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A tensile testing fixture, comprising a base plate (1) and a cover plate (2) detachably connected to the base plate (1), wherein the base plate (1) and the cover plate (2) have a receiving space for accommodating a product, characterized in that, The accommodating space is provided with a limiting groove (4), and a pull head (31) at least partially placed in the limiting groove (4) and a pull rod (32) detachably connected to the pull head (31). The base plate (1) and / or the cover plate (2) are also provided with a pressure holding component (6) that presses against the pull head (31) when in a pressure holding state.

2. The tensile testing fixture according to claim 1, characterized in that, A number of limiting members (5) are also provided in the accommodating space, and each of the limiting members (5) is connected to the inner wall of the accommodating space to form the limiting groove (4).

3. The tensile testing fixture according to claim 1, characterized in that, The top surface of the pull head (31) protrudes from the top surface of the cover plate (2).

4. The tensile testing fixture according to claim 1, characterized in that, The end face of the pull head (31) near the base plate (1) is provided with a fixing adhesive layer (311).

5. A tensile testing fixture according to claim 1, characterized in that, The pressure holding assembly (6) includes a pressure holding plate (61) hinged to the cover plate (2) and a pressure holding buckle plate (62) hinged to the cover plate (2). In the pressure holding state, the pressure holding buckle plate (62) is fastened to the pressure holding plate (61), such that the pressure holding plate (61) is at least partially always in contact with the pull head (31).

6. A tensile testing fixture according to claim 5, characterized in that, The pressure-holding buckle plate (62) and the pressure-holding plate (61) are connected by at least one elastic element (63), which is either a spring or an elastic plunger.

7. A tensile testing fixture according to claim 5, characterized in that, The end face of the pressure plate (61) that contacts the pull head (31) is provided with a pressure-holding adhesive layer (611).

8. A tensile testing fixture according to claim 1, characterized in that, A positioning component (7) is also provided between the base plate (1) and the cover plate (2), with at least a portion of the positioning component (7) located on the base plate (1) and at least a portion of the positioning component (7) located on the cover plate (2).

9. A tensile testing fixture according to claim 1, characterized in that, The positioning component (7) includes a plurality of positioning posts disposed on either the base plate (1) or the cover plate (2), and positioning holes corresponding to the positioning posts.

10. A tensile testing fixture according to claim 1, characterized in that, The cover plate (2) and the base plate (1) are detachably connected by at least one fastener, snap-fit ​​connector or threaded assembly.

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