A true triaxial multi-field coupling hopkinson pressure bar

Abstract

The utility model relates to Hopkinson pressure bar technical field especially relates to a true triaxial multi -field coupling Hopkinson pressure bar, including X -axis Hop pressure pole, Y -axis Hop pressure pole, Z -axis Hop pressure pole and test block, X -axis Hop pressure pole, Y -axis Hop pressure pole and Z -axis Hop pressure pole respectively through two X -axis pressure plate, two Y -axis pressure plate and two Z -axis pressure plate are limited to the six sides of test block, be provided with adjusting mechanism on X -axis pressure plate, Y -axis pressure plate and Z -axis pressure plate. The utility model first puts test block into lower Z -axis pressure plate, and lets two Y -axis pressure plate move to test block, drives lower Z -axis pressure plate to move upwards again, until lower collision sensor is triggered by lower Z -axis pressure plate, drives upper Z -axis pressure plate to move downwards after, until upper collision sensor is triggered by upper Z -axis pressure plate, if infrared receiver receives the infrared signal that infrared emitter sent at this moment, drives two X -axis pressure plate to move to test block, and then adjusts test block to triaxial center point place.

Description

Technical Field

[0001] This utility model relates to the field of Hopkinson compression bar technology, and in particular to a true triaxial multi-field coupled Hopkinson compression bar. Background Technology

[0002] The Hopkinson bar is a physical performance testing instrument used in the fields of mechanics, engineering and technology, materials science, and mechanical engineering. The Hopkinson bar experiment can measure the stress-strain curve of a material at a high strain rate. The measured stress-strain curve is the key to studying the dynamic mechanical properties of the material specimen.

[0003] When using a triaxial Hopkinson bar to test the six sides of a test block, three Hopkinson bars with different axes simultaneously test the six sides of the test block to obtain the experimental results of the test block under triaxial multi-field coupling. If the test block is not at the triaxial center point of the triaxial Hopkinson bar, the three Hopkinson bars with different axes will not be able to impact the test block with the same stroke. However, the existing triaxial Hopkinson bar lacks an adjustment component to adjust the test block to be at the triaxial center point, which can easily lead to errors in the experimental results of the test block under triaxial multi-field coupling. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that the lack of an adjustment component to adjust the test block to the center point of the three axes easily leads to errors in the experimental results of the test block under three-axis multi-field coupling, and to propose a true three-axis multi-field coupling Hopkinson pressure bar.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A true triaxial multi-field coupled Hopkinson pressure bar includes an X-axis Hopkinson pressure bar, a Y-axis Hopkinson pressure bar, a Z-axis Hopkinson pressure bar, and a test block. The X-axis Hopkinson pressure bar, Y-axis Hopkinson pressure bar, and Z-axis Hopkinson pressure bar are respectively used to limit the installation of the test block on six sides via two X-axis pressure plates, two Y-axis pressure plates, and two Z-axis pressure plates. The X-axis pressure plates, Y-axis pressure plates, and Z-axis pressure plates are provided with adjustment mechanisms for adjusting the test block to be located at the triaxial center point.

[0006] Preferably, the X-axis Hope bar, Y-axis Hope bar, and Z-axis Hope bar are all composed of an impact bar, an incident bar, a transmission bar, and a buffer, and an X-axis mounting bracket, a Y-axis mounting bracket, and a Z-axis mounting bracket are respectively installed on one side of the X-axis Hope bar, Y-axis Hope bar, and Z-axis Hope bar.

[0007] Preferably, the X-axis Hope pressure bar, Y-axis Hope pressure bar, and Z-axis Hope pressure bar are respectively mounted to the X-axis mounting bracket, Y-axis mounting bracket, and Z-axis mounting bracket via a first bracket, a second bracket, and a third bracket. The first bracket, the second bracket, and the third bracket are respectively connected to the X-axis pressure plate, the Y-axis pressure plate, and the Z-axis pressure plate. The X-axis mounting bracket, the Y-axis mounting bracket, and the Z-axis mounting bracket are all connected to the first bracket, the second bracket, and the third bracket via cylinders.

[0008] Preferably, the X-axis pressure plate, Y-axis pressure plate and Z-axis pressure plate are all provided with through holes, and the incident rod and the transmission rod are slidably fitted into the through holes.

[0009] Preferably, the adjustment mechanism includes an L-shaped stop block integrally formed on the Z-axis pressure plate and used for initial positioning of the test block. The X-axis pressure plate and the Y-axis pressure plate are respectively equipped with a matching infrared emitter and an infrared receiver. Both the upper and lower ends of the Y-axis pressure plate are equipped with collision sensors for detecting collisions with the Z-axis pressure plate.

[0010] Preferably, the infrared emitter is mounted on the X-axis pressure plate via a mounting plate, the Y-axis pressure plate has a placement groove on its side end, and the mounting plate is integrally formed with a connecting rod that is slidably connected to the placement groove.

[0011] Compared with the prior art, the present invention has the following advantages: This invention first places the test block at the lower Z-axis pressure plate and moves the two Y-axis pressure plates toward the test block. Then, it drives the lower Z-axis pressure plate to move upward until the lower collision sensor is triggered by the lower Z-axis pressure plate. After that, it drives the upper Z-axis pressure plate to move downward until the upper collision sensor is triggered by the upper Z-axis pressure plate. At this time, if the infrared receiver receives the infrared signal emitted by the infrared transmitter, it drives the two X-axis pressure plates to move toward the test block until the two X-axis pressure plates are blocked by the test block and cannot move further. This adjusts the test block to the center point of the three axes, avoiding errors in the experimental results of three-axis multi-field coupling due to the test block not being located at the center point of the three axes. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a true triaxial multi-field coupled Hopkinson pressure bar proposed in this utility model; Figure 2 This is a schematic diagram of the first, second, and third supports of a true triaxial multi-field coupled Hopkinson pressure bar proposed in this utility model. Figure 3 In this utility model Figure 2 Enlarged schematic diagram of part A; Figure 4 In this utility model Figure 2 Enlarged diagram of part B; Figure 5This is a schematic diagram of the Z-axis pressure plate structure of a true triaxial multi-field coupled Hopkinson pressure bar proposed in this utility model; Figure 6 This is a schematic diagram of the X-axis pressure plate structure of a true triaxial multi-field coupled Hopkinson pressure bar proposed in this utility model; Figure 7 This is a schematic diagram of the Y-axis pressure plate structure of a true triaxial multi-field coupled Hopkinson pressure bar proposed in this utility model.

[0013] In the diagram: 1. X-axis Hope pressure bar; 2. Y-axis Hope pressure bar; 3. Z-axis Hope pressure bar; 4. Test block; 5. X-axis pressure plate; 6. Y-axis pressure plate; 7. Z-axis pressure plate; 8. X-axis mounting bracket; 9. Y-axis mounting bracket; 10. Z-axis mounting bracket; 11. First bracket; 12. Second bracket; 13. Third bracket; 14. Through hole; 15. L-shaped stop; 16. Infrared transmitter; 17. Infrared receiver; 18. Collision sensor; 19. Mounting plate; 20. Connecting rod; 21. Placement slot. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figures 1-7 A true triaxial multi-field coupled Hopkinson pressure bar includes an X-axis Hopkinson pressure bar 1, a Y-axis Hopkinson pressure bar 2, a Z-axis Hopkinson pressure bar 3, and a test block 4. The test block 4 has a cubic structure to facilitate simultaneous Hopkinson pressure bar experiments on all six sides of the test block 4. The X-axis Hopkinson pressure bar 1, the Y-axis Hopkinson pressure bar 2, and the Z-axis Hopkinson pressure bar 3 are respectively installed by two X-axis pressure plates 5, two Y-axis pressure plates 6, and two Z-axis pressure plates 7 to limit the six sides of the test block 4. The X-axis pressure plates 5, Y-axis pressure plates 6, and Z-axis pressure plates 7 are provided with adjustment mechanisms to adjust the test block 4 to be located at the triaxial center point, so as to avoid errors in the triaxial multi-field coupling experimental results due to the test block 4 not being located at the triaxial center point.

[0016] Preferably, the X-axis Hope bar 1, Y-axis Hope bar 2, and Z-axis Hope bar 3 are all composed of an impact bar, an incident bar, a transmission bar, and a buffer. The X-axis Hope bar 1, Y-axis Hope bar 2, and Z-axis Hope bar 3 all strike the incident bar through the impact bar, and the incident bar impacts the test block 4 located between the incident bar and the transmission bar. At the same time, the buffer is used to buffer the impact force at the transmission bar, thereby obtaining the experimental results of the test block 4 under triaxial multi-field coupling. The X-axis Hope bar 1, Y-axis Hope bar 2, and Z-axis Hope bar 3 are respectively mounted on one side with an X-axis mounting bracket 8, a Y-axis mounting bracket 9, and a Z-axis mounting bracket 10.

[0017] Preferably, the X-axis Hope pressure bar 1, the Y-axis Hope pressure bar 2, and the Z-axis Hope pressure bar 3 are respectively mounted to the X-axis mounting bracket 8, the Y-axis mounting bracket 9, and the Z-axis mounting bracket 10 via the first bracket 11, the second bracket 12, and the third bracket 13. The first bracket 11, the second bracket 12, and the third bracket 13 are respectively connected to the X-axis pressure plate 5, the Y-axis pressure plate 6, and the Z-axis pressure plate 7. The X-axis mounting bracket 8, the Y-axis mounting bracket 9, and the Z-axis mounting bracket 10 are all connected to the first bracket 11 via cylinders. The second bracket 12 and the third bracket 13 are connected so that the first bracket 11, the second bracket 12 and the third bracket 13 can drive the X-axis pressure plate 5, the Y-axis pressure plate 6 and the Z-axis pressure plate 7 to move linearly through the cylinder, thereby adjusting the position of the X-axis pressure plate 5, the Y-axis pressure plate 6 and the Z-axis pressure plate 7; and since the X-axis pressure plate 5, the Y-axis pressure plate 6 and the Z-axis pressure plate 7 are all provided with through holes 14, so that the three incident rods and transmission rods of different axes can pass through the through holes 14 to abut against the test block 4.

[0018] Preferably, the adjustment mechanism includes an L-shaped stop 15 integrally formed on the Z-axis pressure plate 7 and used for initial positioning of the test block 4. The X-axis pressure plate 5 and Y-axis pressure plate 6 are respectively equipped with a matching infrared emitter 16 and an infrared receiver 17. Both ends of the Y-axis pressure plate 6 are equipped with collision sensors 18 for detecting collisions with the Z-axis pressure plate 7. When the test block 4 is placed on the lower Z-axis pressure plate 7, the two Y-axis pressure plates 6 are first moved toward the test block 4, and then the lower Z-axis pressure plate 7 is driven to move upward until the lower collision sensor 18 is triggered by the lower Z-axis pressure plate 7. Then, the upper Z-axis pressure plate 7 is driven to move downward until the upper collision sensor 18 is triggered by the upper Z-axis pressure plate 7. At this time, if the infrared receiver 17 receives the infrared signal emitted by the infrared emitter 16, The two X-axis pressure plates 5 are driven to move towards the test block 4 until they are blocked by the test block 4 and cannot move further. This adjusts the test block 4 to the center point of the three axes. The collision sensor 18, infrared emitter 16, and infrared receiver 17 can be controlled by the PLC system for automated operation. The infrared emitter 16 is mounted on the X-axis pressure plate 5 via the mounting plate 19. The Y-axis pressure plate 6 has a placement groove 21 on its side. The mounting plate 19 is integrally formed with a connecting rod 20 that slides through the placement groove 21. When the test block 4 is located at the center point of the three axes, the connecting rod 20 moves into the placement groove 21, thereby strengthening the connection between the X-axis pressure plate 5 and the Y-axis pressure plate 6 and improving the stability of the test block 4 in the X-axis pressure plate 5, Y-axis pressure plate 6, and Z-axis pressure plate 7.

[0019] The functional principle of this utility model can be explained through the following operation methods: First, place the test block 4 into the L-shaped stop 15 of the lower Z-axis pressure plate 7 to initially limit the lower end of the test block 4. Then, drive the two second supports 12 and the two Y-axis pressure plates 6 towards the test block 4 using a cylinder until the two Y-axis pressure plates 6 are blocked by the test block 4 and cannot move further. Next, drive the lower Z-axis pressure plate 7 to move upward until the collision sensor 18 below the two Y-axis pressure plates 6 is triggered by the lower Z-axis pressure plate 7, thereby stopping the adjustment of the lower Z-axis pressure plate 7 and the two Y-axis pressure plates 6. Finally, drive the upper Z-axis pressure plate 7 to move downward until the two Y-axis pressure plates 6 are blocked by the test block 4 and cannot move further. The collision sensor 18 above the Y-axis pressure plate 6 is triggered by the Z-axis pressure plate 7 above to stop the adjustment of the Z-axis pressure plate 7 above. At the same time, the L-shaped stop block 15 above initially limits the upper end of the test block 4. If the infrared receivers 17 of the two Y-axis pressure plates 6 receive the infrared signals emitted by the infrared emitters 16 at the two X-axis pressure plates 5, they will drive the two X-axis pressure plates 5 to move toward the test block 4 until the two X-axis pressure plates 5 are blocked by the test block 4 and cannot move further. At the same time, the connecting rod 20 enters the placement groove 21, thereby adjusting the test block 4 to the triaxial center point.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A true triaxial multi-field coupled Hopkinson pressure bar, comprising an X-axis Hopkinson pressure bar (1), a Y-axis Hopkinson pressure bar (2), a Z-axis Hopkinson pressure bar (3), and a test block (4), characterized in that, The X-axis Hope pressure bar (1), Y-axis Hope pressure bar (2) and Z-axis Hope pressure bar (3) respectively limit the installation of the test block (4) on six sides through two X-axis pressure plates (5), two Y-axis pressure plates (6) and two Z-axis pressure plates (7). The X-axis pressure plates (5), Y-axis pressure plates (6) and Z-axis pressure plates (7) are provided with adjustment mechanisms for adjusting the test block (4) to be located at the center point of the three axes.

2. The true triaxial multi-field coupled Hopkinson bar according to claim 1, characterized in that, The X-axis Hope pressure bar (1), Y-axis Hope pressure bar (2) and Z-axis Hope pressure bar (3) are all composed of an impact bar, an incident bar, a transmission bar and a buffer. The X-axis Hope pressure bar (1), Y-axis Hope pressure bar (2) and Z-axis Hope pressure bar (3) are respectively mounted on one side with an X-axis mounting bracket (8), a Y-axis mounting bracket (9) and a Z-axis mounting bracket (10).

3. A true triaxial multi-field coupled Hopkinson bar according to claim 2, characterized in that, The X-axis Hope pressure bar (1), Y-axis Hope pressure bar (2) and Z-axis Hope pressure bar (3) are respectively installed to the X-axis mounting bracket (8), Y-axis mounting bracket (9) and Z-axis mounting bracket (10) through the first bracket (11), the second bracket (12) and the third bracket (13). The first bracket (11), the second bracket (12) and the third bracket (13) are respectively connected to the X-axis pressure plate (5), the Y-axis pressure plate (6) and the Z-axis pressure plate (7). The X-axis mounting bracket (8), the Y-axis mounting bracket (9) and the Z-axis mounting bracket (10) are all connected to the first bracket (11), the second bracket (12) and the third bracket (13) through cylinders.

4. A true triaxial multi-field coupled Hopkinson bar according to claim 3, characterized in that, The X-axis pressure plate (5), Y-axis pressure plate (6) and Z-axis pressure plate (7) are all provided with through holes (14), and the incident rod and the transmission rod are slidably fitted in the through holes (14).

5. A true triaxial multi-field coupled Hopkinson bar according to claim 3, characterized in that, The adjustment mechanism includes an L-shaped stop (15) integrally formed on the Z-axis pressure plate (7) and used for initial positioning of the test block (4). The X-axis pressure plate (5) and the Y-axis pressure plate (6) are respectively equipped with a matching infrared emitter (16) and an infrared receiver (17). Both the upper and lower ends of the Y-axis pressure plate (6) are equipped with collision sensors (18) for detecting collisions with the Z-axis pressure plate (7).

6. A true triaxial multi-field coupled Hopkinson bar according to claim 5, characterized in that, The infrared emitter (16) is mounted on the X-axis pressure plate (5) via the mounting plate (19). The Y-axis pressure plate (6) has a placement groove (21) on its side end. The mounting plate (19) is integrally formed with a connecting rod (20) that is slidably connected to the placement groove (21).

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