A composite loading device for shape memory performance testing

Abstract

The utility model relates to material science and engineering technical field discloses a kind of composite loading device for shape memory performance test, including bottom plate, the bottom plate top is fixedly connected with mounting bracket, the first hydraulic cylinder is fixedly connected with the center position at the top of mounting bracket inner wall, the first hydraulic cylinder bottom is fixedly connected with pressure block, the bottom plate bottom center position is fixedly connected with cylinder, the cylinder top is fixedly connected with pivot, the pivot top is fixedly connected with vacuum chuck.In the utility model, by setting cylinder and vacuum chuck on bottom plate, the plate material used for testing is driven to the position of second hydraulic cylinder by cylinder, and the top of connecting rod, respectively, stretching, extruding and bending, so that the plate material is driven to change test position by cylinder, solve the problem that manual replacement test instrument is needed when shape memory test is carried out to plate.

Description

Technical Field

[0001] This utility model relates to the field of materials science and engineering technology, and in particular to a composite loading device for testing shape memory performance. Background Technology

[0002] Specialized equipment used to evaluate the shape memory properties of shape memory composite materials under stress conditions, such as deformation capacity, recovery capacity, and response temperature. Its core function is to apply a controllable mechanical load to the sample and, in conjunction with a temperature-controlled environment, observe and record the deformation and recovery process of the material.

[0003] Current composite loading devices for shape memory performance testing test the material by setting up various fixtures and pressure devices. During the test, the temperature range needs to be switched manually, the load mode needs to be adjusted or the fixtures need to be replaced, which makes it difficult to achieve continuous testing under multiple working conditions. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a composite loading device for shape memory performance testing, which aims to improve the problem of manually changing the testing instrument when performing shape memory testing on sheet materials.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a composite material loading device for shape memory performance testing, comprising a base plate, a mounting frame fixedly connected to the top of the base plate, a first hydraulic cylinder fixedly connected to the center of the top of the inner wall of the mounting frame, a pressure block fixedly connected to the bottom of the first hydraulic cylinder, a cylinder fixedly connected to the center of the bottom of the base plate, a rotating shaft fixedly connected to the top of the cylinder, a vacuum suction cup fixedly connected to the top of the rotating shaft, motors fixedly connected to the grooves on both sides of the inner wall of the mounting frame, lead screws fixedly provided at the output ends of the two motors, connecting blocks threadedly connected to the outer surfaces of the four lead screws, connecting rods fixedly connected between two adjacent connecting blocks, second hydraulic cylinders fixedly connected to both sides of the inner wall of the mounting frame, mechanical grippers provided on opposite sides of the two second hydraulic cylinders, a plate provided between the two mechanical grippers, and a quick-release assembly provided between the second hydraulic cylinders and the mechanical grippers.

[0006] Preferably, the quick-release assembly includes two magnets, which are fixedly connected to opposite sides of the two mechanical grippers respectively. Each of the output ends of the two second hydraulic cylinders is fixedly connected to a connecting base. Each of the top and bottom of the two connecting bases is fixedly connected to a connecting piece. Each of the two adjacent connecting pieces is fixedly connected to a plurality of locking shafts on opposite sides. Each of the front sides of the two connecting bases is fixedly connected to a control button.

[0007] Preferably, the maximum extension height of the cylinder is higher than that of the connecting rod, and the vacuum suction cup is in close contact with the plate.

[0008] Preferably, the second hydraulic cylinder is positioned at a height lower than the connecting rod, and the mechanical gripper is in close contact with the plate.

[0009] Preferably, the cylinder and the first hydraulic cylinder are in the same vertical position, and the output end of the first hydraulic cylinder is lower than the connecting rod at its maximum extension.

[0010] Preferably, the opposite sides of the two adjacent lead screws are rotatably connected to the front and rear sides of the mounting bracket groove.

[0011] Preferably, the mechanical gripper has four sliding grooves on the side adjacent to the connecting base, and the shape of the mounting part of the connecting base matches the shape of the mounting part of the mechanical gripper.

[0012] Preferably, the engaging shaft passes through the base, and the upper and lower sets of engaging shafts are tightly fitted with the grooves on the upper and lower sides of the mechanical gripper.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, by setting a cylinder and a vacuum suction cup on the base plate, the test plate is driven by the cylinder to the position of the second hydraulic cylinder and the top of the connecting rod, and is stretched, squeezed and bent respectively. This allows the test position of the plate to be changed by the cylinder, which solves the problem of manually changing the test instrument when performing shape memory test on the plate.

[0015] 2. In this utility model, by setting a magnet between the mechanical gripper and the connecting base, the mechanical gripper can be quickly attracted to the connecting base by magnetic attraction during installation. The connecting base pushes the connector and the locking shaft to lock the mechanical gripper onto the connecting base, which solves the problem of cumbersome replacement of mechanical grippers when testing plates of different material specifications. Attached Figure Description

[0016] Figure 1 This is a perspective view of a composite loading device for testing shape memory performance according to the present invention.

[0017] Figure 2 This is a schematic diagram of a lead screw for a composite loading device used for shape memory performance testing, as proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of a pressure block for a composite material loading device for testing shape memory performance, as proposed in this utility model.

[0019] Figure 4 This is a schematic diagram of a magnet in a composite loading device for testing shape memory performance, as proposed in this utility model.

[0020] Figure 5 This is a schematic diagram of the clamping shaft of a composite loading device for shape memory performance testing proposed in this utility model.

[0021] Legend:

[0022] 1. Base plate; 2. Mounting bracket; 3. Cylinder; 4. Connecting rod; 5. Connecting block; 6. Motor; 7. Lead screw; 8. First hydraulic cylinder; 9. Pressure block; 10. Plate; 11. Second hydraulic cylinder; 12. Mechanical gripper; 13. Connecting base; 14. Connecting piece; 15. Engaging shaft; 16. Control button; 17. Magnet; 18. Rotating shaft; 19. Vacuum suction cup. Detailed Implementation

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

[0024] Reference Figures 1-3 This utility model provides an embodiment of a composite material loading device for shape memory performance testing, comprising a base plate 1, a mounting frame 2 fixedly connected to the top of the base plate 1, a first hydraulic cylinder 8 fixedly connected to the center of the top of the inner wall of the mounting frame 2, a pressure block 9 fixedly connected to the bottom of the first hydraulic cylinder 8, a cylinder 3 fixedly connected to the center of the bottom of the base plate 1, a rotating shaft 18 fixedly connected to the top of the cylinder 3, a vacuum suction cup 19 fixedly connected to the top of the rotating shaft 18, motors 6 fixedly connected to the grooves on both sides of the inner wall of the mounting frame 2, lead screws 7 fixedly provided at the output ends of the two motors 6, connecting blocks 5 threadedly connected to the outer surfaces of the four lead screws 7, connecting rods 4 fixedly connected between two adjacent connecting blocks 5, second hydraulic cylinders 11 fixedly connected to both sides of the inner wall of the mounting frame 2, mechanical grippers 12 provided on opposite sides of the two second hydraulic cylinders 11, a plate 10 provided between the two mechanical grippers 12, and a quick-release assembly provided between the second hydraulic cylinders 11 and the mechanical grippers 12.

[0025] Specifically, by setting a cylinder 3 at the bottom of the base plate 1, when performing a memory test on the sheet material 10, the sheet material 10 is first placed on top of the cylinder 3, and the vacuum suction cup 19 adsorbs the sheet material 10. The extension of the cylinder 3 moves the sheet material 10 to the position of the second hydraulic cylinder 11. The second hydraulic cylinder 11 is activated, which moves the mechanical gripper 12 to the position of the sheet material 10 to clamp it. After both ends of the sheet material 10 are clamped, the vacuum suction cup 19 closes to release the adsorption, and the sheet material 10 is then held by the mechanical gripper 12 and the second hydraulic cylinder 11. Under the control of 1, tensile and extrusion tests are performed. After the test is completed, the vacuum suction cup 19 re-adsorbs the plate 10, the mechanical gripper 12 relaxes and retracts, the cylinder 3 continues to lift the plate 10 upward until the height exceeds the connecting rod 4, and then the rotating shaft 18 drives the plate 10 to rotate 90 degrees. Then the cylinder 3 retracts, the vacuum suction cup 19 releases the adsorption, and the first hydraulic cylinder 8 drives the pressure block 9 to move downward to perform a bending test on the plate 10. This solves the problem of manually changing the testing instrument when performing shape memory tests on the plate 10.

[0026] Reference Figures 4-5 The quick-release assembly includes two magnets 17, which are fixedly connected to the opposite sides of the two mechanical grippers 12 respectively. The output ends of the two second hydraulic cylinders 11 are fixedly connected to the connecting bases 13. The top and bottom of the two connecting bases 13 are fixedly connected to the connecting parts 14. The two adjacent connecting parts 14 are fixedly connected to the opposite sides of the connecting parts 14 with multiple locking shafts 15. The front side of the two connecting bases 13 is fixedly connected to the control button 16.

[0027] Specifically, by setting a connecting base 13 between the mechanical gripper 12 and the second hydraulic cylinder 11, when the mechanical gripper 12 needs to be replaced, the control button 16 on the connecting base 13 is pressed to control the push rod in the connecting base 13 to push out the two connecting parts 14, so that the locking shaft 15 on the connecting parts 14 is pulled out from the mechanical gripper 12 and the connecting base 13. After the mechanical gripper 12 loses its locking, it is easily pulled off. When installing the new mechanical gripper 12, the magnet 17 set on the mechanical gripper 12 automatically attracts it to the connecting base 13. Then, the control button 16 is pressed again, so that the two connecting parts 14 are pulled back by the push rod in the connecting base 13, so that the locking shaft 15 is inserted into the locking groove set on the connecting base 13 and the mechanical gripper 12. This solves the problem of the mechanical gripper 12 being troublesome to replace when testing plates 10 of different material specifications.

[0028] Reference Figure 3 The maximum extension height of cylinder 3 is higher than that of connecting rod 4, and vacuum suction cup 19 is tightly attached to plate 10.

[0029] Specifically, when the cylinder 3 extends fully and drives the plate 10 beyond the connecting rod 4, the plate 10 is rotated to be placed horizontally on the top of the two connecting rods 4, thereby achieving the purpose of placing the plate 10 on the connecting rod 4. The plate 10 is prevented from falling off by the suction of the vacuum suction cup 19.

[0030] Reference Figure 2 The second hydraulic cylinder 11 is positioned at a height lower than the connecting rod 4, and the mechanical gripper 12 is in close contact with the plate 10.

[0031] Specifically, when the sheet 10 is subjected to tensile and extrusion tests, the sheet 10 is lifted by the cylinder 3 to the height of the second hydraulic cylinder 11, and the second hydraulic cylinder 11 pushes the mechanical grippers 12 to both sides of the sheet 10 for clamping.

[0032] Reference Figure 2 The cylinder 3 and the first hydraulic cylinder 8 are in the same vertical position, and the output end of the first hydraulic cylinder 8 is lower than the connecting rod 4 at its maximum extension.

[0033] Specifically, by setting the vertical position of cylinder 3 to the same position as the first hydraulic cylinder 8, when cylinder 3 lifts the center position of plate 10 and places it on the connecting rod 4, the first hydraulic cylinder 8 drives the pressure block 9 to apply pressure to the center position of plate 10, thereby preventing plate 10 from tipping over during bending tests.

[0034] Reference Figure 2 The two adjacent lead screws 7 are rotatably connected to the front and rear sides of the groove of the mounting bracket 2 on opposite sides.

[0035] Specifically, the two connecting rods 4 are connected to the lead screw 7 via the connecting block 5. When the lead screw 7 is driven to rotate by the motor 6, the distance between the two lead screws 7 is adjusted to accommodate plates 10 of different widths.

[0036] Reference Figures 4-5 The mechanical gripper 12 has four sliding grooves on the side adjacent to the connecting base 13, and the shape of the mounting part of the connecting base 13 matches the shape of the mounting part of the mechanical gripper 12.

[0037] Specifically, at the contact position between the mechanical gripper 12 and the connecting base 13, one is provided with a sliding groove and the other with a protrusion. When the mechanical gripper 12 is magnetically connected to the connecting base 13 by the magnet 17, the sliding groove and protrusion respectively provided on the two are used to ensure the accuracy of its installation direction.

[0038] Reference Figures 4-5 The locking shaft 15 passes through and connects to the base 13, and the upper and lower sets of locking shafts 15 fit tightly with the grooves on the upper and lower sides of the mechanical gripper 12.

[0039] Specifically, after the mechanical gripper 12 is adsorbed onto the connecting base 13, the locking shaft 15 is inserted between the connecting base 13 and the mechanical gripper 12 to complete the fixation. Subsequently, when the mechanical gripper 12 is driven by the second hydraulic cylinder 11 to stretch the plate 10, multiple locking shafts 15 are provided between the mechanical gripper 12 and the second hydraulic cylinder 11 to ensure the connection between the two.

[0040] Working principle: When performing the memory test on the sheet 10, the sheet 10 is first placed on top of the cylinder 3. The vacuum suction cup 19 adsorbs the sheet 10. The extension of the cylinder 3 moves the sheet 10 to the position of the second hydraulic cylinder 11. The second hydraulic cylinder 11 starts and moves the mechanical gripper 12 to the position of the sheet 10 to clamp it. After both ends of the sheet 10 are clamped, the vacuum suction cup 19 closes and releases the adsorption. The sheet 10 is subjected to tensile and compressive tests under the control of the mechanical gripper 12 and the second hydraulic cylinder 11. After the test is completed, the vacuum suction cup 19 re-adsorbs the sheet 10, the mechanical gripper 12 relaxes and retracts, the cylinder 3 continues to lift the sheet 10 upward until the height exceeds the connecting rod 4, and the rotating shaft 18 drives the sheet 10 to rotate 90 degrees. Then the cylinder 3 retracts, the vacuum suction cup 19 releases the adsorption, and the first hydraulic cylinder 8 drives the pressure block 9 to move downward to perform a bending test on the sheet 10.

[0041] When testing sheet materials 10 of different specifications, different mechanical grippers 12 need to be replaced according to the characteristics of sheet material 10. When replacing them, by pressing the control button 16 on the connecting base 13, the push rod in the connecting base 13 is controlled to push out the two connecting parts 14. After the mechanical gripper 12 loses the engagement of the locking shaft 15, it is easily pulled out. When installing the new mechanical gripper 12, the magnet 17 set on the mechanical gripper 12 automatically attracts it to the connecting base 13. Then, by pressing the control button 16 again, the two connecting parts 14 are pulled back by the push rod in the connecting base 13, so that the locking shaft 15 is inserted into the locking groove set on the connecting base 13 and the mechanical gripper 12, thereby completing the fixation. Subsequently, when the mechanical gripper 12 is driven by the second hydraulic cylinder 11 to stretch the sheet material 10, multiple locking shafts 15 are set between the mechanical gripper 12 and the second hydraulic cylinder 11 to ensure the connection between the two.

[0042] 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 composite loading device for shape memory performance testing, comprising a base plate (1), characterized in that: A mounting bracket (2) is fixedly connected to the top of the base plate (1). A first hydraulic cylinder (8) is fixedly connected to the center of the top of the inner wall of the mounting bracket (2). A pressure block (9) is fixedly connected to the bottom of the first hydraulic cylinder (8). A cylinder (3) is fixedly connected to the center of the bottom of the base plate (1). A rotating shaft (18) is fixedly connected to the top of the cylinder (3). A vacuum suction cup (19) is fixedly connected to the top of the rotating shaft (18). Motors (6) are fixedly connected to the grooves on both sides of the inner wall of the mounting bracket (2). The two motors (6) are fixedly connected to each other. Each output end is fixedly provided with a lead screw (7), and the outer surface of each of the four lead screws (7) is threaded with a connecting block (5). A connecting rod (4) is fixedly connected between two adjacent connecting blocks (5). A second hydraulic cylinder (11) is fixedly connected to both sides of the inner wall of the mounting bracket (2). A mechanical gripper (12) is provided on the opposite side of each of the two second hydraulic cylinders (11). A plate (10) is provided between the two mechanical grippers (12). A quick-release assembly is provided between the second hydraulic cylinder (11) and the mechanical gripper (12).

2. A composite loading device for shape memory performance testing according to claim 1, characterized in that: The quick-release assembly includes two magnets (17), which are fixedly connected to the opposite sides of the two mechanical grippers (12). The output ends of the two second hydraulic cylinders (11) are fixedly connected to a connecting base (13). The top and bottom of the two connecting bases (13) are fixedly connected to connectors (14). The two adjacent connectors (14) are fixedly connected to the opposite sides of the two connecting bases (14) with multiple locking shafts (15). The front side of the two connecting bases (13) is fixedly connected to a control button (16).

3. The composite loading device for shape memory performance testing according to claim 1, characterized in that: The maximum extension height of the cylinder (3) is higher than that of the connecting rod (4), and the vacuum suction cup (19) is tightly fitted with the plate (10).

4. A composite loading device for shape memory performance testing according to claim 1, characterized in that: The second hydraulic cylinder (11) is at a height lower than the connecting rod (4), and the mechanical gripper (12) is in close contact with the plate (10).

5. A composite loading device for shape memory performance testing according to claim 1, characterized in that: The cylinder (3) and the first hydraulic cylinder (8) are in the same vertical position, and the output end of the first hydraulic cylinder (8) is lower than the connecting rod (4) at its maximum extension.

6. A composite loading device for shape memory performance testing according to claim 1, characterized in that: The two adjacent lead screws (7) are rotatably connected to the front and rear sides of the groove of the mounting bracket (2) on opposite sides.

7. A composite loading device for shape memory performance testing according to claim 1, characterized in that: The mechanical gripper (12) has four sliding grooves on the side adjacent to the connecting base (13), and the shape of the mounting part of the connecting base (13) matches the shape of the mounting part of the mechanical gripper (12).

8. A composite loading device for shape memory performance testing according to claim 2, characterized in that: The locking shaft (15) passes through the connecting base (13), and the upper and lower sets of locking shafts (15) are closely fitted with the grooves on the upper and lower sides of the mechanical gripper (12).

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