Clamping device for tensile test of composite material

Abstract

The utility model discloses a composite material tensile test clamping device which comprises a workbench and a connecting plate, the outer side wall of the connecting plate is fixedly connected with a motor, and the output end of the motor is fixedly connected with a threaded rod. In the actual use process, after the motor on the connecting plate is started, the threaded rod is driven to rotate, the rotation of the threaded rod drives the connecting sleeve to start to move and drives one end of the first connecting rod and one end of the second connecting rod on the two sides to move upwards, and the first connecting rod is limited on the positioning column through the rotating rod, so that when the connecting sleeve moves upwards, the second connecting rod is driven to move upwards. The other end of the first connecting rod rotates towards the middle, and in the process that the other end of the first connecting rod rotates towards the middle, the clamping plate is driven to move towards the middle, so that the clamping effect on the composite material is achieved, and a first anti-skid pad on the clamping plate can effectively prevent the composite material from being disengaged; by means of the matching mode, the problems that in an existing device, clamping of the composite materials is not firm, and slipping is prone to occurring are solved, and effective clamping and fixing of the different composite materials are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material testing, in particular to a composite material tensile test clamping device. Background Art

[0002] A test clamping device for composite material tension is an important device specially designed for composite material tension testing. With its precise structure and reliable performance, it provides a solid guarantee for accurately evaluating the mechanical properties of composite materials. This clamping device is usually made of high-strength materials and has excellent rigidity and stability, and can withstand the huge tensile force generated by composite materials during tension. Its design fully considers the characteristics of composite materials and can firmly clamp composite material specimens of various shapes and sizes to ensure that the specimens will not slip or be damaged during the test. In the composite material tension test, this clamping device can accurately transmit the tensile force, allowing the specimen to be stretched under specified conditions, thereby obtaining important mechanical parameters of the composite material such as tensile strength and elastic modulus;

[0003] A search revealed Chinese patent publication number CN106932276B, which discloses an axial tensile testing device for cement-based composite material specimens. The patent describes a technical solution in which embedded screws and bonded steel sheets are used to reduce stress concentration and irregular fractures at both ends of the specimen during tensile testing. Steel sheets are bonded around the ends of the specimen and connected to an external tensile device via bolts, resulting in a uniform tensile stress distribution. The frame assembly significantly improves the overall rigidity of the testing machine.

[0004] In this solution, although a uniform distribution of tensile stress is achieved, when stretching different composite materials, the two ends of the composite materials must be fixed first, and the clamping components of the device cannot be adjusted, resulting in that it can only adapt to composite materials of the same size. Different composite materials need to replace the corresponding clamps, and the practical scope is small, thereby reducing the work efficiency. In order to solve this technical problem, the utility model proposes a test clamping device for composite material stretching. Utility Model Content

[0005] (1) Technical problems solved

[0006] In this solution, although a uniform distribution of tensile stress is achieved, when stretching different composite materials, the two ends of the composite materials must be fixed first, and the clamping components of the device cannot be adjusted, resulting in that it can only adapt to composite materials of the same size. Different composite materials need to replace the corresponding clamps, and the practical scope is small, thereby reducing the work efficiency. In order to solve this technical problem, the utility model proposes a test clamping device for composite material stretching.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a test clamping device for composite material stretching, comprising a workbench and a connecting plate, the outer wall of the connecting plate is fixedly connected to a motor, the output end of the motor is fixedly connected to a threaded rod, the outer wall of the threaded rod is threadedly connected to a connecting sleeve, both side walls of the connecting sleeve are rotatably connected to a connecting rod, the other end of each connecting rod is rotatably connected to a splint, the other end of each splint is fixedly connected to an anti-slip pad, the outer wall of the connecting plate is fixedly connected to a pair of positioning columns, the outer wall of each positioning column is rotatably connected to a rotating rod, and at the same time, the other end of the rotating rod is rotatably connected to the middle part of the connecting rod, both sides of the connecting sleeve are rotatably connected to a connecting rod two, and the other end of the connecting rod two is rotatably connected to the inside of the splint.

[0009] Preferably, the splints on both sides are centrally symmetrical, and the anti-slip pads on both sides correspond to each other.

[0010] Preferably, the top of the workbench is fixedly connected to a base, a nut is fixedly connected inside the base, and a threaded column is threadedly connected inside the nut, and a handle is fixedly connected to the outer side wall of the threaded column.

[0011] Preferably, the threaded column passes through the base and extends to the outside of the base.

[0012] Preferably, a slider is slidably connected to the top of the base, a connecting tube is fixedly connected inside the slider, and a threaded column is rotatably connected inside the connecting tube, and at the same time, a second anti-slip pad is fixedly connected to the base and the inner wall of the slider.

[0013] Preferably, the four corners of the workbench are fixedly connected to support rods, the top of the support rods is fixedly connected to a top plate, the top of the top plate is fixedly connected to an electric push rod, the connecting plate is fixedly connected to the output end of the electric push rod, and at the same time, a pair of positioning rods are fixedly connected to the top of the connecting plate, and the positioning rods pass through the top plate and extend to the outside of the top plate, and the positioning rods are slidably connected inside the top plate.

[0014] (3) Beneficial effects

[0015] The utility model provides a test clamping device for composite material tensioning, which has the following beneficial effects:

[0016] (1) After the motor on the connecting plate is started, it drives the threaded rod to rotate. As the threaded rod rotates, the connecting sleeve starts to move. When the connecting sleeve moves up, it drives one end of the connecting rod 1 and the connecting rod 2 on both sides to move up. Since the connecting rod 1 is limited on the positioning column by the rotating rod, when the connecting sleeve moves up, the other end of the connecting rod 1 will rotate toward the middle. In the process of the other end of the connecting rod 1 rotating toward the middle, it will drive the splint to move toward the middle, thereby achieving a clamping effect on the composite material. The anti-slip pad 1 on the splint can effectively prevent the composite material from detaching. This coordination method solves the problem of loose clamping and easy slipping of composite materials in existing devices, realizes effective clamping and fixation of different composite materials, ensures that the composite material can be stably fixed when various operations are performed on the composite material, and improves the reliability of operation and work efficiency.

[0017] (2) When the handle is turned, the threaded column will be driven to rotate, and the nut will limit the rotation of the threaded column, ensuring that the threaded column moves in a specific direction. When the threaded column moves, it will drive the slider on the connecting tube to move back and forth. When the composite material is placed on the base, the composite material can be quickly positioned through the cooperation between the slider and the anti-slip pad 2 on the base. This cooperation method solves the problems of difficult positioning and inconvenient operation of the composite material in the existing device, can quickly and accurately fix the position of the composite material, improve work efficiency, and provide convenient conditions for subsequent processing, testing and other operations of the composite material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall side structure of the utility model;

[0020] Figure 3 This is a side structural diagram of the utility model;

[0021] Figure 4 It is a side structural diagram of the utility model.

[0022] In the figure: 1. Workbench; 2. Support rod; 3. Top plate; 4. Connecting plate; 5. Motor; 6. Threaded rod; 7. Positioning column; 8. Rotating rod; 9. Connecting sleeve; 10. Connecting rod 1; 11. Clamp; 12. Connecting rod 2; 13. Anti-slip pad 1; 14. Base; 15. Nut; 16. Threaded column; 17. Slider; 18. Anti-slip pad 2; 19. Connecting tube; 20. Electric push rod; 21. Positioning rod; 22. Turning handle. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] See also Figure 1-4 , the utility model provides a technical solution:

[0025] Embodiment 1: A test clamping device for tensile testing of composite materials, including a workbench 1 and a connecting plate 4, the outer side wall of the connecting plate 4 is fixedly connected to a motor 5, the output end of the motor 5 is fixedly connected to a threaded rod 6, the outer side wall of the threaded rod 6 is threadedly connected to a connecting sleeve 9, both side walls of the connecting sleeve 9 are rotatably connected to a connecting rod 10, the other end of each connecting rod 10 is rotatably connected to a splint 11, the other end of each splint 11 is fixedly connected to an anti-slip pad 13, the outer side wall of the connecting plate 4 is fixedly connected to a pair of positioning columns 7, the outer side wall of each positioning column 7 is rotatably connected to a rotating rod 8, and at the same time, the other end of the rotating rod 8 is rotatably connected to the middle of the connecting rod 10, both sides of the connecting sleeve 9 are rotatably connected to a connecting rod 2 12, the other end of the connecting rod 2 12 is rotatably connected to the inside of the splint 11, the splints 11 on both sides are centrally symmetrical, and the anti-slip pads 13 on both sides correspond to each other.

[0026] When the composite material is facing between the anti-slip pads 13 on both sides, the motor 5 on the connecting plate 4 is started. Under the action of the motor 5, the threaded rod 6 is driven to rotate. As the threaded rod 6 rotates, the connecting sleeve 9 will be driven to move upward. In the process of the connecting sleeve 9 moving upward, it will drive the connecting rod 1 10 and one end of the connecting rod 2 12 on both sides to move upward. Since the connecting rod 10 is limited on the positioning column 7 by the rotating rod 8, when the connecting sleeve 9 moves upward, the other end of the connecting rod 10 will rotate toward the middle. When the other end of the connecting rod 10 rotates toward the middle, it will drive the splint 11 to move toward the middle, thereby achieving a clamping effect. Through this clamping method, combined with the anti-slip pad 13, the composite material can be effectively prevented from detaching, ensuring that the composite material can be stably fixed during the operation of the composite material, providing reliable protection for subsequent processing, testing and other operations.

[0027] Example 2: The difference between this example and Example 1 is that the top of the workbench 1 is fixedly connected to a base 14, a nut 15 is fixedly connected inside the base 14, and a threaded column 16 is threadedly connected inside the nut 15, and a turning handle 22 is fixedly connected to the outer wall of the threaded column 16, and the threaded column 16 passes through the base 14 and extends to the outside of the base 14, and a slider 17 is slidably connected to the top of the base 14, and a connecting tube 19 is fixedly connected inside the slider 17, and the threaded column 16 is rotatably connected in the connecting tube 19, and the base 14 and the inner side wall of the slider 17 are fixedly connected to an anti-slip pad 2 18, and the four corners of the workbench 1 are fixedly connected to support rods 2, and the top of the support rod 2 is fixedly connected to a top plate 3, and the top of the top plate 3 is fixedly connected to an electric push rod 20, and the connecting plate 4 is fixedly connected to the output end of the electric push rod 20, and a pair of positioning rods 21 are fixedly connected to the top of the connecting plate 4, and the positioning rods 21 pass through the top plate 3 and extend to the outside of the top plate 3, and the positioning rods 21 are slidably connected in the top plate 3.

[0028] The composite material is placed on the base 14 and the handle 22 is turned. This action drives the threaded post 16 to rotate. As the threaded post 16 rotates, it is restrained by the nut 15, allowing it to move left and right on the base 14. The movement of the threaded post 16 also drives the slider 17 on the connecting cylinder 19 back and forth. The interaction between the base 14 and the anti-slip pad 18 on the slider 17 allows for rapid positioning of the composite material, greatly improving work efficiency. Next, the electric push rod 20 is activated, driving the connecting plate 4 downward. Once it reaches the position where the composite material is positioned, the push rod 20 is activated again, driving the connecting plate 4 upward, thereby beginning to stretch the composite material upward. Furthermore, the positioning rod 21 limits the connecting plate 4 during movement to prevent angular deviation. During this process, the shape of the composite material is carefully observed; any cracks are considered unacceptable. This operational process effectively tests the tensile properties of the composite material to ensure that its quality meets requirements.

[0029] Working principle: when the staff needs to do a tensile test of the composite material, first place the composite material on the base 14, then turn the handle 22, and the threaded column 16 is driven to rotate under the action of the handle 22. When the threaded column 16 rotates, it is limited by the nut 15, so that the threaded column 16 will move left and right on the base 14, and when the threaded column 16 moves, it will drive the slider 17 on the connecting tube 19 to move back and forth. Through the cooperation between the base 14 and the anti-slip pad 2 18 on the slider 17, the composite material can be quickly positioned, which improves work efficiency. At this time, the electric push rod 20 is started, and the connecting plate 4 is driven downward by the action of the electric push rod 20. When it moves to the position of the composite material, and the composite material is facing between the anti-slip pad 1 13 on both sides, the motor 5 on the connecting plate 4 is started, and the motor 5 Under the action of , the threaded rod 6 is driven to rotate, and when the threaded rod 6 rotates, it will drive the connecting sleeve 9 to move upward. When the connecting sleeve 9 moves upward, it will drive one end of the connecting rod 10 and the connecting rod 2 12 on both sides to move upward. Since the connecting rod 10 is limited on the positioning column 7 by the rotating rod 8, the other end of the connecting rod 10 will rotate toward the middle. When the other end of the connecting rod 10 rotates toward the middle, it will drive the splint 11 to move toward the middle, thereby achieving a clamping effect, and then the anti-slip pad 13 is used to prevent the composite material from detaching. At this time, starting the electric push rod 20 will drive the connecting plate 4 to move upward, thereby starting to stretch the composite material upward, and the connecting plate 4 is limited by the positioning rod 21 when moving to prevent the connecting plate 4 from angular deviation when moving. At this time, observe the shape change of the composite material. If cracks appear, it is unqualified.

[0030] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

Claims

1. A test clamping device for tensile testing of composite materials, characterized by: The invention comprises a workbench (1) and a connecting plate (4), wherein the outer wall of the connecting plate (4) is fixedly connected to a motor (5), the output end of the motor (5) is fixedly connected to a threaded rod (6), the outer wall of the threaded rod (6) is threadedly connected to a connecting sleeve (9), both side walls of the connecting sleeve (9) are rotatably connected to a connecting rod (10), the other end of each connecting rod (10) is rotatably connected to a splint (11), the other end of each splint (11) is fixedly connected to an anti-slip pad (13), the outer wall of the connecting plate (4) is fixedly connected to a pair of positioning columns (7), the outer wall of each positioning column (7) is rotatably connected to a rotating rod (8), and the other end of the rotating rod (8) is rotatably connected to the middle of the connecting rod (10), both sides of the connecting sleeve (9) are rotatably connected to a connecting rod (12), and the other end of the connecting rod (12) is rotatably connected to the inside of the splint (11).

2. A composite material tensile test clamping device according to claim 1, characterized in that: The clamping plates (11) on both sides are centrally symmetrical, and the anti-slip pads (13) on both sides correspond to each other.

3. A composite material tensile test clamping device according to claim 1, characterized in that: The top of the workbench (1) is fixedly connected to a base (14), the interior of the base (14) is fixedly connected to a nut (15), and the interior of the nut (15) is threadedly connected to a threaded column (16), and the outer wall of the threaded column (16) is fixedly connected to a handle (22).

4. A composite material tensile test clamping device according to claim 3, characterized in that: The threaded column (16) passes through the base (14) and extends to the outside of the base (14).

5. A composite material tensile test clamping device according to claim 4, characterized in that: The top of the base (14) is slidably connected to a slider (17), the interior of the slider (17) is fixedly connected to a connecting tube (19), and the threaded column (16) is rotatably connected in the connecting tube (19), and at the same time, the base (14) and the inner side wall of the slider (17) are fixedly connected to a second anti-slip pad (18).

6. A composite material tensile test clamping device according to claim 1, characterized in that: The four corners of the workbench (1) are fixedly connected to support rods (2), the top of the support rods (2) is fixedly connected to a top plate (3), the top of the top plate (3) is fixedly connected to an electric push rod (20), the connecting plate (4) is fixedly connected to the output end of the electric push rod (20), and at the same time, a pair of positioning rods (21) are fixedly connected to the top of the connecting plate (4), and the positioning rods (21) pass through the top plate (3) and extend to the outside of the top plate (3), and the positioning rods (21) are slidably connected inside the top plate (3).

Images