Honeycomb sandwich structure plane stretching glue joint clamp positioning tool

Abstract

The utility model discloses a positioning tool of a honeycomb sandwich structure plane stretching glue joint clamp. The positioning tool comprises a positioning assembly and a pressurizing assembly. The positioning assembly is used for clamping, positioning and mounting the honeycomb sandwich structure sample; the pressurizing assembly is matched with the positioning assembly and is used for applying pressure to the honeycomb sandwich structure sample and pressing the adhesive film between the honeycomb sandwich piece and the loading block; and during heating, the positioning assembly is used for preventing the loading block from generating relative displacement, and the honeycomb sandwich piece and the loading block are pressed and bonded tightly by the pressurizing assembly. According to the utility model, the position pins are tightly attached to the periphery of the sample to prevent the sample and the loading block from generating relative displacement, and meanwhile, a certain pressure is applied between the test block and the adhesive film through the tool to ensure that the test block and the loading block are tightly combined. The device is reliable in positioning, convenient to operate, adjustable in screwing torque and simple to operate, and has good practical value.

Description

Technical Field

[0001] The utility model relates to a positioning tool for a flat tensile bonding fixture of a honeycomb sandwich structure. Background Art

[0002] During the flat tensile test process of a honeycomb sandwich structure (specimen), the upper and lower panels of the honeycomb sandwich part need to be bonded and cured with the upper and lower loading blocks through an adhesive film to form an integral specimen to be tested. Then, after being connected to the testing machine fixture through positioning pins, a tensile test is carried out to verify the mechanical properties of the honeycomb or the bonding performance between the honeycomb and the panel.

[0003] However, the adhesive film between the honeycomb sandwich structure and the loading block will soften during the heating process, and the resin of the adhesive film will undergo relative flow, resulting in relative displacement between the loading block and the honeycomb sandwich structure. The position of the loading block changes to make the bonding surface of the specimen complete, and the change in the position of the loading block will change its coaxiality, leading to test failure. In addition, the traditional method of bonding the honeycomb sandwich structure and the loading block through an adhesive film is to use high-temperature tape to wind the loading block and the specimen to prevent relative displacement during the heating process as much as possible, but actually, the occurrence of slippage cannot be fundamentally solved; and due to the uneven surface of the specimen, there will be unbonded or weakly bonded situations between the loading block and the adhesive film, which will also affect the authenticity of the test results.

[0004] Therefore, how to solve the bonding fastness and position accuracy between the honeycomb sandwich structure and the loading block and ensure the accuracy of the flat tensile test results is still an urgent problem to be solved. Summary of the Utility Model

[0005] Aiming at the problems that the relative displacement between the loading block and the honeycomb sandwich structure caused by the flow of the adhesive film between the honeycomb sandwich structure and the loading block, and the unbonded or weakly bonded situations between the loading block and the adhesive film, etc., the utility model provides a positioning tool for a flat tensile bonding fixture of a honeycomb sandwich structure. By arranging positioning pins closely around the specimen, the relative displacement between the specimen and the loading block is prevented. At the same time, a certain pressure is applied between the test block and the adhesive film through the tooling to ensure the close combination between the test block and the loading block. The specific technical solutions are as follows:

[0006] A positioning tool for a flat tensile bonding fixture of a honeycomb sandwich structure includes a positioning component and a pressurizing component; the positioning component is used for clamping and positioning the honeycomb sandwich structure specimen; the pressurizing component cooperates with the positioning component to apply pressure to the honeycomb sandwich structure specimen to press the adhesive film between the honeycomb sandwich part and the loading block; during heating, the positioning component is used to prevent the relative displacement of the loading block, and the pressurizing component presses the honeycomb sandwich part and the loading block tightly and bonds them closely.

[0007] The aforesaid positioning tool for the flat tensile bonding fixture of the honeycomb sandwich structure, wherein the positioning component includes a base plate and a plurality of positioning pins; a placement position for the honeycomb sandwich structure specimen is provided on the base plate, and positioning holes for installing the positioning pins are provided around the placement position of the honeycomb sandwich structure specimen; the positioning pins are tightly installed in the positioning holes on the base plate against the honeycomb sandwich structure specimen to clamp and position the installation of the honeycomb sandwich structure specimen.

[0008] Preferably, for the aforesaid positioning tool for the flat tensile bonding fixture of the honeycomb sandwich structure, there are four positioning pins, which are respectively arranged around the honeycomb sandwich structure specimen to prevent relative displacement in any direction of the loading block.

[0009] Preferably, for the aforesaid positioning tool for the flat tensile bonding fixture of the honeycomb sandwich structure, the positioning pins are in the form of quadrangular prisms.

[0010] Preferably, for the aforesaid positioning tool for the flat tensile bonding fixture of the honeycomb sandwich structure, the support height of the positioning pins is slightly less than the height of the honeycomb sandwich structure specimen.

[0011] Preferably, for the aforesaid positioning tool for the flat tensile bonding fixture of the honeycomb sandwich structure, the pressurizing component includes an upper pressing plate, a pressurizing position for the honeycomb sandwich structure specimen is provided on the upper pressing plate, and bolt through holes connected to the positioning pins are provided around the pressurizing position of the honeycomb sandwich structure specimen. One end of the positioning pin is provided with a threaded hole, and a bolt passes through the bolt through hole of the upper pressing plate and is screwed tightly with the threaded hole at the end of the positioning pin to apply pressure to the honeycomb sandwich structure specimen.

[0012] Preferably, for the aforesaid positioning tool for the flat tensile bonding fixture of the honeycomb sandwich structure, a plurality of placement positions for the honeycomb sandwich structure specimens are provided on the base plate, and the positioning pins between adjacent placement positions for the honeycomb sandwich structure specimens are shared.

[0013] Preferably, for the aforesaid positioning tool for the flat tensile bonding fixture of the honeycomb sandwich structure, the positioning tool further includes a torque wrench, which is used to tighten the bolts to apply a fixed torque value to the honeycomb sandwich structure specimen.

[0014] Preferably, for the aforesaid positioning tool for the flat tensile bonding fixture of the honeycomb sandwich structure, the positioning tool further includes a pressure detector, which is located between the upper pressing plate and the loading block and is used to detect the magnitude of the pressure applied by the upper pressing plate to the honeycomb sandwich structure specimen.

[0015] The beneficial effects of the present utility model:

[0016] 1) By arranging positioning pins closely around the specimen, the present utility model prevents relative displacement between the specimen and the loading block. At the same time, a certain pressure is applied between the test block and the adhesive film through the tooling to ensure a tight combination between the test block and the loading block.

[0017] 2) The utility model applies a torque with a fixed value through a torque wrench to ensure that the adhesive film between the honeycomb sandwich part and the loading block is tightly pressed. During the subsequent heating process, as the resin flows, all gaps can be filled with the adhesive film, ensuring a tight bond between the loading block and the honeycomb sandwich part, and solving the problems of slip during the curing process and weak bonding due to uneven stress on the adhesive film in the existing plane tensile test of honeycomb sandwich parts.

[0018] 3) The positioning of the utility model is reliable, the operation is convenient, and the tightening torque is adjustable; and this positioning tooling can be used immediately after being installed, without adjustment, the operation is simple, without other auxiliary actions. After the curing is completed, simply loosen the bolt and remove the positioning pin to achieve unlocking and resetting, which has good practical value. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the positioning tooling for the plane tensile bonding fixture of the honeycomb sandwich structure of the utility model;

[0020] Figure 2 It is a front view of the positioning tooling for the plane tensile bonding fixture of the honeycomb sandwich structure of the utility model;

[0021] Figure 3 It is a top view of the positioning tooling for the plane tensile bonding fixture of the honeycomb sandwich structure of the utility model;

[0022] Figure 4 It is a side view of the positioning tooling for the plane tensile bonding fixture of the honeycomb sandwich structure of the utility model.

[0023] In the figure: 1. Positioning component; 11. Base plate; 10. Placement position for the honeycomb sandwich structure specimen; 12. Positioning pin; 13. Positioning hole; 2. Pressurizing component; 21. Upper pressure plate; 20. Pressurizing position for the honeycomb sandwich structure specimen; 22. Bolt through-hole; 23. Threaded hole; 3. Honeycomb sandwich structure specimen; 31. Honeycomb sandwich part; 33. Loading block. Detailed Embodiment

[0024] To make the objectives, technical solutions, and advantages of the utility model clearer, the technical solutions of the utility model will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings. Embodiment

[0025] This embodiment is a positioning tooling for the plane tensile bonding fixture of the honeycomb sandwich structure, as Figures 1 to 4As shown in the figure, it includes a positioning component 1 and a pressing component; the positioning component 1 is used to clamp and position the honeycomb sandwich structure specimen 3; the pressing component 2 cooperates with the positioning component 1 to apply pressure to the honeycomb sandwich structure specimen 3 to press the adhesive film between the honeycomb sandwich part 31 and the loading block 33; during heating, the positioning component 1 is used to prevent relative displacement of the loading block 33, and the pressing component 2 presses the honeycomb sandwich part 31 and the loading block 33 tightly together for close bonding.

[0026] Specifically, for the positioning tooling of the flat tensile bonding fixture of the honeycomb sandwich structure in this embodiment, the positioning component 1 includes a base plate 11 and several positioning pins 12; a placement position 10 for the honeycomb sandwich structure specimen is provided on the base plate 11, and positioning holes 13 for installing the positioning pins 12 are provided around the placement position 10 of the honeycomb sandwich structure specimen; the positioning pins 12 are closely attached to the honeycomb sandwich structure specimen 3 and installed in the positioning holes 13 on the base plate 11 to clamp and position the honeycomb sandwich structure specimen 3. Preferably, there are four positioning pins 12, which are respectively arranged around the honeycomb sandwich structure specimen 3 to prevent relative displacement of the loading block 33 in any direction. Further preferably, the positioning pins 12 are in the form of quadrangular prisms to better fit the honeycomb sandwich structure specimen 3 for limiting.

[0027] Moreover, for the positioning tooling of the flat tensile bonding fixture of the honeycomb sandwich structure in this embodiment, the pressing component 2 includes an upper pressing plate 21. A pressing position 20 for the honeycomb sandwich structure specimen is provided on the upper pressing plate 21, and bolt through-holes 22 connected to the positioning pins 12 are provided around the pressing position 20 of the honeycomb sandwich structure specimen. One end of the positioning pin 12 is provided with a threaded hole 23, and a bolt passes through the bolt through-hole 22 of the upper pressing plate 21 and is screwed tightly with the threaded hole 23 at the end of the positioning pin 12 to apply pressure to the honeycomb sandwich structure specimen 3. And the supporting height of the positioning pin 12 is slightly less than the height of the honeycomb sandwich structure specimen 3 to facilitate the upper pressing plate 21 to apply pressure.

[0028] In addition, for the positioning tooling of the flat tensile bonding fixture of the honeycomb sandwich structure in this embodiment, multiple placement positions 10 for the honeycomb sandwich structure specimen can be provided on the base plate 11, and the positioning pins 12 between adjacent placement positions 10 for the honeycomb sandwich structure specimen can be shared, that is, two bolt through-holes can be provided in the upper part of the positioning pin in the middle position for the installation of the upper pressing plate 21.

[0029] In addition, for the honeycomb sandwich structure plane tensile bonding fixture positioning tooling described in this embodiment, the positioning tooling further includes a torque wrench, which is used to tighten the bolts to apply a torque with a fixed force value to the honeycomb sandwich structure specimen 3, so as to realize the loading and release of the applied pressure. And between the upper pressing plate 21 and the loading block 33, a pressure detector can also be provided to detect the magnitude of the pressure applied by the upper pressing plate 21 to the honeycomb sandwich structure specimen 3, so as to ensure that the adhesive film between the honeycomb sandwich part 31 of the honeycomb sandwich structure specimen 3 and the loading block 33 is tightly pressed.

[0030] The working principle of the present utility model: The positioning pins are installed in the positioning holes of the base plate. After the honeycomb sandwich specimen and the loading block are bonded through the adhesive film to form a specimen as a whole, it is placed between the four positioning pins. The upper pressing plate is placed on the upper surface of the specimen as a whole. The bolts pass through the positioning holes of the upper pressing plate and are screwed tightly after being connected to the threaded holes at the upper ends of the positioning pins. A torque with a fixed force value is applied through the torque wrench to ensure that the adhesive film between the honeycomb sandwich part and the loading block is tightly pressed. During the subsequent heating process, as the resin flows, all gaps can be filled with the adhesive film to ensure a tight bond between the loading block and the honeycomb sandwich part. After the upper and lower panels of the honeycomb sandwich part are bonded and cured with the upper and lower loading blocks, it is then connected to the testing machine fixture for tensile testing to verify the mechanical properties of the honeycomb or the bonding performance between the honeycomb and the panel.

[0031] Generally speaking, the present utility model prevents relative displacement of the specimen and the loading block by arranging positioning pins closely around the specimen. At the same time, a certain pressure is applied between the test block and the adhesive film through the tooling to ensure a tight combination between the test block and the loading block. A torque with a fixed force value is applied through the torque wrench to ensure that the adhesive film between the honeycomb sandwich part and the loading block is tightly pressed. During the subsequent heating process, as the resin flows, all gaps can be filled with the adhesive film to ensure a tight bond between the loading block and the honeycomb sandwich part, solving the problems of slippage during the curing process and weak bonding due to uneven force on the adhesive film in the existing plane tensile testing of honeycomb sandwich parts. Moreover, the positioning of the present utility model is reliable, the operation is convenient, and the tightening torque is adjustable; and this positioning tooling can be used immediately after being installed, without adjustment, the operation is simple, and there are no other auxiliary actions. After the curing is completed, simply loosen the bolts and remove the positioning pins to achieve unlocking and resetting, which has good practical value.

[0032] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A positioning tool for a flat tensile bonding fixture of a honeycomb sandwich structure, characterized in that: It includes a positioning component (1) and a pressing component; The positioning component (1) is used for clamping and positioning the honeycomb sandwich structure specimen (3); The pressing component (2) cooperates with the positioning component (1) and is used for applying pressure to the honeycomb sandwich structure specimen (3) to tightly press the adhesive film between the honeycomb sandwich part (31) and the loading block (33); During heating, the positioning component (1) is used to prevent relative displacement of the loading block (33), and the pressing component (2) tightly presses and adheres the honeycomb sandwich part (31) and the loading block (33) together for tight bonding.

2. The positioning tooling of the flat tensile bonding fixture for the honeycomb sandwich structure according to claim 1, characterized in that: The positioning component (1) includes a base plate (11) and several positioning pins (12); The base plate (11) is provided with a honeycomb sandwich structure specimen placement position (10), and positioning holes (13) for installing the positioning pins (12) are provided around the honeycomb sandwich structure specimen placement position (10); The positioning pins (12) are closely attached to the honeycomb sandwich structure specimen (3) and are installed in the positioning holes (13) on the base plate (11) to clamp and position the honeycomb sandwich structure specimen (3).

3. The positioning tooling of the flat tensile bonding fixture for the honeycomb sandwich structure according to claim 2, characterized in that: There are four positioning pins (12), which are respectively arranged around the honeycomb sandwich structure specimen (3) to prevent relative displacement of the loading block (33) in any direction.

4. The positioning tooling of the flat tensile bonding fixture for the honeycomb sandwich structure according to claim 3, characterized in that: The positioning pins (12) are in the form of quadrangular prisms.

5. The positioning tooling of the flat tensile bonding fixture for the honeycomb sandwich structure according to claim 4, characterized in that: The support height of the positioning pins (12) is slightly less than the height of the honeycomb sandwich structure specimen (3).

6. The positioning tooling of the flat tensile bonding fixture for the honeycomb sandwich structure according to claim 5, characterized in that: The pressing component (2) includes an upper pressing plate (21). The upper pressing plate (21) is provided with a honeycomb sandwich structure specimen pressing position (20), and bolt through-holes (22) connected to the positioning pins (12) are provided around the honeycomb sandwich structure specimen pressing position (20). One end of the positioning pin (12) is provided with a threaded hole (23). Bolts pass through the bolt through-holes (22) of the upper pressing plate (21) and are screwed tightly with the threaded holes (23) at the ends of the positioning pins (12) to apply pressure to the honeycomb sandwich structure specimen (3).

7. The positioning tooling of the flat tensile bonding fixture for the honeycomb sandwich structure according to claim 6, characterized in that: Multiple honeycomb sandwich structure specimen placement positions (10) are arranged on the base plate (11), and the positioning pins (12) between adjacent honeycomb sandwich structure specimen placement positions (10) are shared.

8. The positioning tooling for the flat tensile bonding fixture of the honeycomb sandwich structure according to claim 7, characterized in that: This positioning tooling further includes a torque wrench, which is used to tighten the bolts to apply a fixed torque value to the honeycomb sandwich structure specimen (3).

9. The positioning tooling of the flat tensile bonding fixture for the honeycomb sandwich structure according to claim 8, characterized in that: This positioning tooling further includes a pressure detector, which is located between the upper pressing plate (21) and the loading block (33) and is used to detect the magnitude of the pressure applied by the upper pressing plate (21) to the honeycomb sandwich structure specimen (3).

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