Foam shearing tool connecting device
By designing a connecting device including a shell, connector, ball valve and screw, the stress concentration problem of foam shear tooling on the test machine is solved, and the accurate evaluation of foam shear performance and improvement of testing efficiency is achieved.
Patent Information
- Application Number
- CN202421796586.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-29
AI Technical Summary
Existing foam shear tools are prone to stress concentration when connected to the test machine, resulting in inaccurate evaluation of foam shear performance.
A connecting device including a housing, a connecting head, a ball valve and a screw is designed to achieve a stable connection between the foam shear tool and the test machine through a threaded connection and a locking ring, and allows 360 degrees of rotation and up and down movement to avoid stress concentration.
It effectively avoids stress concentration, ensures the true evaluation of foam shear performance, and improves testing efficiency and accuracy.
Smart Images
Figure CN223091668U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of composite material testing, in particular to a foam shear tooling connection device. Background Art
[0002] As one of the main mechanical property tests of composite materials, the principle of foam shear test is to bond the foam onto the shear tooling, and then connect the shear tooling to the testing machine through an adapter to test the shear performance of the core material.
[0003] Since the foam is manually bonded onto the shear tooling, there will inevitably be a certain error between the left and right end faces of the bonded foam shear tooling. At this time, when using a fixed adapter to connect the shear tooling and then install it on the testing machine, due to the multi-link structure and the immovable adapter, there will be a certain torque on the upper and lower joints of the shear tooling on the testing machine, resulting in stress concentration, loss of specimen strength, and inability to evaluate the foam shear performance well, which affects the foam shear test. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a foam shear tooling connection device, which can effectively avoid the stress concentration problem of the foam shear tooling and truly and effectively evaluate the foam shear performance.
[0005] The purpose of the utility model can be achieved by adopting the following technical solutions:
[0006] A foam shear tooling connection device includes a housing, a connection head, a ball valve and a screw. The housing is of a hollow structure, and its inner upper part is processed with internal threads. One end of the connection head extends into the housing and is connected with the internal threads of the housing, and the other end is used for connecting with the testing machine. The ball valve is arranged in the lower part of the housing. One end of the screw is connected with the ball valve, and the other end extends downward and penetrates through the housing. The part of the screw extending out of the housing is processed with external threads for connecting with the foam shear tooling.
[0007] Further, it also includes a locking ring. The connection head is processed with external threads for installing the locking ring. The locking ring is installed on the connection head through the external threads, and the connection device is locked with the testing machine through the locking ring.
[0008] Further, the connection head is connected with the testing machine through a pin hole.
[0009] Further, the ball valve is of a hemispherical structure.
[0010] Further, a limiting block for preventing the ball valve from coming out is arranged inside the housing and below the ball valve.
[0011] Further, the side of the limiting block in contact with the ball valve has a curved surface structure, which is matched with the hemispherical structure of the ball valve.
[0012] Further, the length of the external thread of the screw is greater than 10 mm.
[0013] Compared with the prior art, the present utility model has the following advantages and beneficial effects:
[0014] The connecting device of the present utility model has the advantages of simple structure, simple operation, convenient disassembly and installation, etc., can effectively avoid the stress concentration problem of the foam shearing tooling, truly and effectively evaluate the foam shearing performance, and improve the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic three-dimensional structure view of the connecting device of the present utility model.
[0016] Figure 2 is a front view of the connecting device of the present utility model.
[0017] Figure 3 is Figure 2 a sectional view taken along line A-A of
[0018] Figure 4 is a schematic connection view of the connecting device of the present utility model and the foam shearing tooling. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0020] Embodiment:
[0021] As Figures 1 to 4 shown, this embodiment provides a connecting device for a foam shearing tooling, including a housing 1, a connecting head 2, a ball valve 3 and a screw 4. The housing 1 has a hollow structure, and an internal thread is machined on its upper inner part. One end of the connecting head 2 extends into the housing 1 and is connected to the internal thread of the housing 1. The other end is machined with a pin hole 201 for connecting to a testing machine. The ball valve 3 is arranged at the lower inner part of the housing 1. One end of the screw 4 is welded to the ball valve 3, and the other end extends downward and passes through the housing 1. The part of the screw 4 extending out of the housing 1 is machined with an external thread for connecting to the foam shearing tooling 7.
[0022] Specifically, it further includes a locking ring 5. The connector 2 is machined with an external thread for installing the locking ring 5. The locking ring 5 is installed on the connector 2 through the external thread. The connecting device and the testing machine are locked together through the locking ring 5, so that the foam shearing tooling 7 and the testing machine can operate smoothly without clearance.
[0023] Specifically, the ball valve 3 has a hemispherical structure. Inside the housing 1 and below the ball valve 3, a limiting block 6 for preventing the ball valve 3 from coming out is provided. The side of the limiting block in contact with the ball valve 3 has a curved surface structure, and this curved surface structure matches the hemispherical structure of the ball valve 3.
[0024] Specifically, the length of the external thread of the screw 4 is greater than 10 mm. When installing the foam shearing tooling onto the testing machine through the connecting device, the position of the pin hole of the connecting device can be adjusted by adjusting the length of the threaded connection between the screw 4 and the foam shearing tooling 7, which is convenient for the testing machine and the connecting device to be connected by a pin.
[0025] The connecting device of the present utility model can achieve 360-degree rotation in the horizontal plane and can also move up and down. When the foam shearing tooling is installed onto the testing machine by using the connecting device, the foam shearing tooling can move in any direction, effectively solving stress concentration.
[0026] The connecting device of the present utility model will be described by taking an example with an existing fixed adapter:
[0027] Example 1: During the process of testing balsa wood shear specimens, since the density of the balsa wood body can reach 150 Kg / m 3 , the balsa wood is adhered to the shearing tooling, then connected through the connector, and finally installed on the testing machine. If a fixed adapter is used, the core material shearing tooling as a whole will be pulled very tightly, with a large torque, resulting in stress concentration. However, by using the connecting device of the present utility model, the stress can be effectively eliminated.
[0028] Example 2: When testing the cast shell and web PET specimens, since the specimens themselves are very hard, the specimens are adhered to the shearing tooling, and then with a fixed adapter, finally connected to the testing machine. The specimens will be pulled very tightly. However, by using the connecting device of the present utility model, the stress can be effectively eliminated.
[0029] Example 3: During the daily actual testing process, since the foam shearing tooling is made of steel sheets with a thickness of more than 1 cm, the self-weight of one set of foam shearing tooling can reach more than 6 Kg. If a fixed adapter is added, it will be even heavier. However, by using the connecting device of the present utility model, the specimens can be installed in sections, saving time and effort and improving work efficiency.
[0030] As described above, it is only a preferred embodiment of the utility model patent, but the protection scope of the utility model patent is not limited thereto. Any person skilled in the art within the scope disclosed by the utility model patent, according to the technical solution of the utility model patent and its inventive concept, makes equivalent substitutions or changes, and all belong to the protection scope of the utility model patent.
Claims
1. A connecting device for a foam shearing tooling, characterized in that: It includes a housing, a connector, a ball valve and a screw rod. The housing is of a hollow structure, and an internal thread is machined on the upper part of its interior. One end of the connector extends into the interior of the housing and is connected to the internal thread of the housing, and the other end is used to connect to a testing machine. The ball valve is arranged at the lower part of the interior of the housing. One end of the screw rod is connected to the ball valve, and the other end extends downward and passes through the housing. The part of the screw rod extending out of the housing is machined with an external thread for connecting to a foam shearing tooling.
2. The foam shearing tooling connection device according to claim 1, characterized in that: It further includes a locking ring. The connector is machined with an external thread for installing the locking ring. The locking ring is installed on the connector through the external thread, and the connecting device is locked to the testing machine through the locking ring.
3. The foam shearing tooling connection device according to claim 1, wherein: The connector is connected to the testing machine through a pin hole.
4. The foam shearing tooling connection device according to claim 1, characterized in that: The ball valve is of a hemispherical structure.
5. The foam shearing tooling connection device according to claim 1, characterized in that: A limiting block for preventing the ball valve from falling out is arranged inside the housing and on the lower side of the ball valve.
6. The foam shearing tooling connection device according to claim 5, characterized in that: The side of the limiting block in contact with the ball valve is of a curved surface structure, and this curved surface structure matches the hemispherical structure of the ball valve.
7. The foam shearing tooling connection device according to claim 1, wherein: The length of the external thread of the screw rod is greater than 10 mm.