V-notch hydraulic tensile shear clamp

Abstract

The utility model relates to the field of hydraulic tensile shearing test fixture, disclose a V type notch hydraulic tensile shearing fixture, including upper clamping concrete, sample and lower clamping concrete, the upper clamping concrete and lower clamping concrete upside down both ends are fixed with the handle at the edge, the upper clamping concrete and lower clamping concrete opposite side fixedly set up with the jack, the lower clamping concrete front end fixedly set up with the centring block, the upper clamping concrete front end fixedly set up with the upper joint, the lower clamping concrete rear end fixedly set up with the lower joint, the upper joint and lower joint outside all are threadedly equipped with lock nuts. In the utility model, through optimization design and stable clamping system, the fixture significantly reduces the skidding phenomenon in the test, ensures the accuracy of test result, effectively improves the consistency of test result, simultaneously, the simple operation design of fixture not only shortens the preparation time, but also improves the test efficiency, reduces the working strength of operating personnel.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic tensile shear test fixtures, and in particular to a V-notch hydraulic tensile shear fixture. Background Technology

[0002] The standard ASTM D7078 / D7078M, "Standard Test Method for Determining Shear Properties of Composite Materials by V-Notch Shear Method", provides a method for determining the shear properties of high-modulus fiber-reinforced composite materials by clamping the two ends of a V-notch specimen onto two pairs of loading rails.

[0003] In the process of realizing this application, the inventors discovered the following problems with the prior art: With the rapid development of modern science and technology and the gradual improvement of the performance of composite materials, the traditional manual V-notch shearing fixture can no longer meet the current needs, and there are problems such as slippage during the test and the complexity of the sample installation process.

[0004] Therefore, those skilled in the art have provided a V-notch hydraulic tensile shearing fixture to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a V-notch hydraulic stretching and shearing fixture. This invention is simple to operate, quick to use, and provides stable data.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A V-notch hydraulic tensile shear fixture includes an upper clamping body, a sample, and a lower clamping body. Handles are fixedly provided at the upper and lower ends of the upper and lower clamping bodies near their edges. A jack is fixedly provided on the opposite side of the upper and lower clamping bodies. A centering block is fixedly provided at the front end of the lower clamping body.

[0008] The upper clamp is fixedly provided with an upper connector at its front end, and the lower clamp is fixedly provided with a lower connector at its rear end. Both the upper connector and the lower connector are threaded with locking nuts on their outer sides.

[0009] Furthermore, the upper ends of the two jack piston rods are fixedly provided with movable jaws, and the inner ends of the upper clamping body and the lower clamping body are both fixedly provided with fixed jaws.

[0010] Furthermore, the sample is placed between two moving jaws and two fixed jaws, and the handle is designed with a curved surface.

[0011] Furthermore, the centering block is V-shaped and contacts one side of the sample.

[0012] Furthermore, a guide rod is connected between the upper clamping body and the lower clamping body, and a scale line is provided at the upper end of the guide rod.

[0013] Furthermore, a connecting plate is fixedly provided at the edge of the upper clamping body and the lower clamping body on opposite sides.

[0014] This utility model has the following beneficial effects:

[0015] This invention presents a V-notch hydraulic tensile shear fixture, which is simple to operate, quick to use, provides stable data, and features an optimized structure. It is specifically designed for tensile shear testing of V-notch composite material specimens. Through optimized design and a stable clamping system, this fixture significantly reduces slippage during testing, ensuring the accuracy of test results and effectively improving the consistency of results. Furthermore, the fixture's easy-to-use design not only shortens preparation time but also improves testing efficiency and reduces the workload of operators. Attached Figure Description

[0016] Figure 1 This is an overall isometric schematic diagram of the present invention;

[0017] Figure 2 This is an isometric schematic diagram of the upper connector, upper clamping body, jack, sample, and centering block of this utility model;

[0018] Figure 3 This is an isometric schematic diagram of the upper connector, handle, upper clamping body, jack and centering block of this utility model.

[0019] Figure 4 This is a top view of the entire utility model;

[0020] Figure 5 This is a schematic diagram illustrating the installation of this utility model.

[0021] Legend:

[0022] 1. Upper connector; 2. Locking nut; 3. Handle; 4. Upper clamp; 5. Jack; 6. Sample; 7. Centering block; 8. Connecting plate; 9. Lower clamp; 10. Lower connector. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1-5One embodiment provided by this utility model:

[0025] A V-notch hydraulic tensile shear fixture includes an upper clamp 4, a sample 6, and a lower clamp 9. Handles 3 are fixedly installed at the edges of both ends of the upper and lower clamps 4 and 9. Jacks 5 are fixedly installed on opposite sides of the upper and lower clamps 4 and 9. A centering block 7 is fixedly installed at the front end of the lower clamp 9. An upper connector 1 is fixedly installed at the front end of the upper clamp 4, and a lower connector 10 is fixedly installed at the rear end of the lower clamp 9. Locking nuts 2 are threaded onto the outer sides of both the upper and lower connectors 1 and 10. Movable jaws are fixedly installed at the upper ends of the piston rods of the two jacks 5, and fixed jaws are fixedly installed at the inner ends of both the upper and lower clamps 4 and 9. The sample 6 is placed between the two movable jaws and the two fixed jaws. The handles 3 are curved, and the centering block 7 is V-shaped and contacts one side of the sample 6. A guide rod connects the upper and lower clamps 4 and 9, with a scale line at its upper end. A connecting plate 8 is fixedly installed at the edge of opposite sides of the upper and lower clamps 4 and 9.

[0026] Specifically, during installation, the fixture is mounted on the lower connector 10 of the testing machine, the pin is inserted, and the locking nut 2 is tightened. The connecting plates 8 on both sides of the fixture are removed. The position of the middle crossbeam is moved so that the upper fixture is close to the upper connector 1. The upper fixture is then mounted into the upper connector 1, the pin is inserted, and the locking nut 2 is tightened. Then, the oil pipes of the oil source are connected to the connectors of the upper and lower fixtures respectively. The middle crossbeam is moved upward to the upper scale line position, and the centering block 7 is placed in the positioning groove of the lower fixture. After the sample 6 is placed on the centering block 7, the clamping button on the oil source manual control box is pressed to clamp the sample 6 with the lower fixture. Next, the force value is zeroed, and the middle crossbeam is moved downwards until the upper clamp coincides with the long scale on the guide rod. Then, the clamping button on the oil source control box is pressed again to clamp the upper clamp to fix the sample 6. Through optimized design and stable clamping system, the clamp significantly reduces slippage during the test, ensures the accuracy of the test results, and effectively improves the consistency of the test results. At the same time, the simple operation design of the clamp not only shortens the preparation time but also improves the testing efficiency and reduces the workload of the operators.

[0027] Working Principle: During installation, install the fixture onto the lower connector 10 of the testing machine, insert the pin, tighten the locking nut 2, remove the connecting plates 8 on both sides of the fixture, move the middle crossbeam to bring the upper fixture closer to the upper connector 1, install the upper fixture into the upper connector 1, insert the pin, and tighten the locking nut 2. Then, connect the oil pipe of the oil source to the connectors of the upper and lower fixtures respectively, move the middle crossbeam upward to the upper scale line position, and place the centering block 7 in the positioning groove of the lower fixture. After the sample 6 is placed on the centering block 7, press the clamping button on the oil source manual control box to clamp the sample 6 with the lower fixture. Next, zero the force value, move the middle crossbeam downward until the upper fixture coincides with the long scale on the guide rod, and then press the clamping button on the oil source manual control box again to clamp the upper fixture to fix the sample 6.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A V-notch hydraulic tensile shear fixture, comprising an upper clamping body (4), a sample (6), and a lower clamping body (9), characterized in that: The upper clamping body (4) and the lower clamping body (9) are fixedly provided with handles (3) at the upper and lower ends near the edges. The upper clamping body (4) and the lower clamping body (9) are fixedly provided with jacks (5) on opposite sides. The lower clamping body (9) is fixedly provided with a centering block (7) at the front end. The upper clamping body (4) is fixedly provided with an upper connector (1) at its front end, and the lower clamping body (9) is fixedly provided with a lower connector (10) at its rear end. Both the upper connector (1) and the lower connector (10) are threaded with locking nuts (2) on their outer sides.

2. The V-notch hydraulic tension shearing fixture according to claim 1, characterized in that: The upper ends of the piston rods of the two jacks (5) are fixedly provided with movable jaws, and the inner ends of the upper clamping body (4) and the lower clamping body (9) are fixedly provided with fixed jaws.

3. The V-notch hydraulic tension shearing fixture according to claim 1, characterized in that: The sample (6) is placed between two moving jaws and two fixed jaws, and the handle (3) is designed with a curved surface.

4. The V-notch hydraulic tension shearing fixture according to claim 1, characterized in that: The centering block (7) is V-shaped and is in contact with one side of the sample (6).

5. A V-notch hydraulic tension shearing fixture according to claim 1, characterized in that: A guide rod is connected between the upper clamping body (4) and the lower clamping body (9), and a scale line is provided on the upper end of the guide rod.

6. The V-notch hydraulic tension shearing fixture according to claim 1, characterized in that: A connecting plate (8) is fixedly provided on the opposite edge of the upper clamping body (4) and the lower clamping body (9).

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