A metal matrix composite material hardness testing device

Abstract

The present invention discloses a metal-based composite material hardness testing device, comprising a base, a shield and a box door, the shield being mounted on the upper wall of the base, the box door being movably mounted at the opening of the shield, and a testing structure being provided on the base; the beneficial effect of the present invention is that an annular water bag is arranged between a main placement seat and a center buckle seat for supporting a sample, and before placing the sample, water is injected into the annular water bag through a water control component, and the annular water bag supported by a plurality of limiting telescopic rods is inflated so that the upper wall of the annular water bag is higher than the upper wall of the main placement seat and the center buckle seat, and the sample is placed on the annular water bag, and the clamping part works to push the sample to move on the annular water bag until the sample is clamped, and the annular water bag plays a role of isolating the sample from the main placement seat and the center buckle seat, and when the placed sample is moved, the sample, the main placement seat and the center buckle seat are prevented from wearing each other, thereby ensuring the quality of the sample and the quality of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of hardness testing equipment, in particular to a hardness testing device for metal-based composite materials. Background Art

[0002] Metal matrix composites (MMCs) are composite materials composed of a metal or its alloy as a matrix, artificially bonded with one or more metal or non-metal reinforcements. The reinforcements are mostly inorganic non-metals, such as ceramics, carbon, graphite, and boron, though metal wire can also be used. Together with polymer-based composites, ceramic-based composites, and carbon / carbon composites, MMCs constitute the modern composite material system.

[0003] In existing hardness testing instruments, the support table for placing samples is in direct contact with the samples. When the samples are clamped, the samples move on the support table, which can easily cause mutual wear between the two and affect the quality of both. After testing one position, if other positions of the sample are to be tested again, the operator needs to move the sample and fix it again, and only one sample can be tested for hardness at a time, which reduces the work efficiency. In view of this, in-depth research was conducted on the above problems, which led to the creation of this case. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems. A metal-based composite material hardness testing device is designed to solve the problem that in the existing hardness testing instrument, the support table for placing the sample is in direct contact with the sample. When the sample is clamped, the sample moves on the support table, which easily causes mutual wear between the two and affects the quality of both. After testing one position, if other positions of the sample are to be tested again, the operator needs to move the sample and fix it again, and only one sample can be tested for hardness at a time, resulting in low work efficiency.

[0005] The technical solution of the present invention to achieve the above-mentioned purpose is: a metal matrix composite material hardness testing device, comprising a base, a shield and a box door, wherein the shield is mounted on the upper wall of the base, and the box door is movably mounted at the opening of the shield, characterized in that a detection structure is provided on the base;

[0006] The detection structure includes: two slides, two sliding seats, two racks, two first hydraulic cylinders, two placement parts, two clamping parts, a transposition part, two second hydraulic cylinders, a connecting plate and two measuring parts;

[0007] The two slides are embedded in the upper wall of the base, the two sliding seats are movably mounted on the two slides, the two racks are mounted on the opposite walls of the two sliding seats, the two first hydraulic cylinders are respectively mounted on the upper walls of the two sliding seats, the two placement parts are mounted on the telescopic ends of the two first hydraulic cylinders, the two clamping parts are respectively mounted on the fixed ends of the two first hydraulic cylinders, the transposition part is mounted on the upper wall of the base, the two second hydraulic cylinders are mounted on the upper wall of the base, the connecting plate is mounted on the telescopic ends of the two second hydraulic cylinders, and the two measuring parts and the two slides are mounted on the connecting plate corresponding to each other;

[0008] The two placement parts each include: a main placement seat, an annular groove, two first semi-arc grooves, an annular water bag, a plurality of limiting telescopic rods, a water tank, a water control component, a central buckle seat, two second semi-arc grooves and a positioning component;

[0009] The main placement seat is installed on the telescopic end of the first hydraulic cylinder, the annular groove is opened on the main placement seat, the two first semi-arc grooves are opened on the main placement seat, the annular water bag is installed on the annular groove, and several of the limiting telescopic rods are inserted into the annular water bag in an array, and several of the limiting telescopic rods are installed on the annular groove, the water tank is installed in the center of the main placement seat, the water control component is installed on the water tank and the annular water bag, the center buckle seat is installed on the main placement seat, the two second semi-arc grooves and the two first semi-arc grooves are opened on the center buckle seat corresponding to each other, and the positioning component is installed on the main placement seat and the center buckle seat.

[0010] Preferably, the water control component includes: a water pump, a water inlet pipe, a water outlet pipe and a water outlet valve;

[0011] The water pump is installed inside the water tank, the water inlet pipe is inserted on the side wall of the water tank, and one end of the water inlet pipe is connected to the water pump, and the other end of the water inlet pipe is inserted on the annular water bag, one end of the water outlet pipe is inserted on the side wall of the water tank, and the other end of the water outlet pipe is inserted on the annular water bag, the water outlet valve is installed at one end of the water outlet pipe, and the two first semi-arc grooves and the two second semi-arc grooves are used to limit the water inlet pipe and the water outlet pipe.

[0012] Preferably, a rubber coating layer is provided between the annular groove and the annular water bag.

[0013] Preferably, the positioning assembly includes: four grooves and four clamping blocks;

[0014] The four grooves are opened on the main placement seat, and the four clamping blocks are matched with the four grooves and installed on the central buckle seat.

[0015] Preferably, the two clamping parts each include: four L-shaped brackets, four first cylinders, four clamping plates and four pairs of first guide rods;

[0016] The four L-shaped brackets are installed in a circular array on the fixed end of the first hydraulic cylinder, the four first cylinders are respectively inserted on the four L-shaped brackets, the four clamps are installed on the four telescopic ends of the first cylinders, four pairs of the first guide rods are installed on the four clamps, and the four pairs of the first guide rods are movably inserted on the four L-shaped brackets.

[0017] Preferably, a second guide rod is movably installed on each of the four L-shaped brackets, one end of the second guide rod is fixedly mounted on the lower wall of the main placement seat, and the other end of the second guide rod is movably installed on the upper wall of the sliding seat.

[0018] Preferably, the shifting unit includes: a motor, a driving gear, a rotating shaft and a driven gear;

[0019] The motor is mounted on the base, the driving gear is sleeved on the motor driving end, the rotating shaft is movably inserted on the base, the driven gear and the driving gear are mounted on the rotating shaft in meshing relationship with each other, and the driven gear and the driving gear are respectively meshed with the two racks.

[0020] Preferably, the two measuring parts each include: a fixed sleeve, a hardness tester, an isolation sleeve, an iron sleeve, two limit plates, a pressure sensor and a clamping assembly;

[0021] The fixed sleeve is inserted into the connecting plate, the hardness tester is movably inserted into the fixed sleeve, the isolation sleeve is sleeved on the hardness tester, the iron sleeve is sleeved on the isolation sleeve, the two limit plates are longitudinally sleeved on the iron sleeve, and the two limit plates are located inside the fixed sleeve, the pressure sensor is installed on the upper wall of the two limit plates, and the clamping assembly is installed on the inner wall of the fixed sleeve.

[0022] Preferably, the clamping assembly includes: four second cylinders and four electromagnets;

[0023] The four second cylinders are installed on the inner wall surface of the fixed sleeve in a circular array, and the four electromagnets are respectively installed on the four telescopic ends of the second cylinders.

[0024] Preferably, a plurality of protective telescopic rods are provided between the fixed sleeve and the iron sleeve.

[0025] The metal matrix composite material hardness testing device manufactured using the technical solution of the present invention has the following beneficial effects:

[0026] 1. An annular water bag is set between the main placement seat and the center buckle seat for supporting the sample. Before placing the sample, water is injected into the annular water bag through the water control component. The annular water bag supported by multiple limiting telescopic rods is inflated, so that the upper wall of the annular water bag is higher than the upper wall of the main placement seat and the center buckle seat. The sample is placed on the annular water bag, and the clamping part works to push the sample to move on the annular water bag until the sample is clamped. The annular water bag plays a role in isolating the sample from the main placement seat and the center buckle seat. When the placed sample is moved, it prevents the sample and the main placement seat and the center buckle seat from wearing each other, thereby ensuring the quality of the sample and the quality of the equipment. After the sample is clamped, the water outlet valve is opened, and the water in the annular water bag flows back to the water tank through the water outlet pipe. The height of the annular water bag becomes smaller, and the first cylinder extends, so that the main placement seat and the center buckle seat fit the sample to support the sample;

[0027] 2. Two groups of testing stations are set up to improve the testing efficiency. At the same time, the two groups of testing stations are moved by the transposition part so that the other position of the sample is aligned with the measuring part for hardness testing. There is no need to manually adjust the position, which improves work efficiency.

[0028] 3. The hardness tester is limited by two limit plates, and there is a space for it to move up and down in the fixed sleeve. It can test two samples with different thicknesses at the same time, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the main cross-sectional structure of a metal matrix composite material hardness testing device according to the present invention.

[0030] Figure 2 This is a schematic top-down cross-sectional structural diagram of a metal matrix composite material hardness testing device according to the present invention.

[0031] Figure 3 This is a schematic diagram of the three-dimensional structure of the placement part of the metal matrix composite material hardness testing device described in the present invention.

[0032] Figure 4 This is an exploded view of the placement portion of a metal matrix composite material hardness testing device according to the present invention.

[0033] Figure 5 This is an exploded view from a bottom angle of the placement portion of a metal matrix composite material hardness testing device according to the present invention.

[0034] Figure 6 The figure is a schematic top view of the clamping portion of a metal matrix composite material hardness testing device according to the present invention.

[0035] Figure 7 The figure is a schematic top view and cross-sectional structure diagram of the measuring portion of a metal matrix composite material hardness testing device according to the present invention.

[0036] Figure 8 For the present invention Figure 1 A schematic diagram of the partially enlarged structure of the metal matrix composite material hardness testing device at position A.

[0037] Figure 9 For the present invention Figure 1 Schematic diagram of the partially enlarged structure at position B of the metal-based composite material hardness testing device.

[0038] Figure 10 For the present invention Figure 1 A schematic diagram of the partially enlarged structure at position C of the metal matrix composite material hardness testing device.

[0039] In the figure: 1. base, 2. protective cover, 3. box door, 4. slide, 5. sliding seat, 6. rack, 7. first hydraulic cylinder, 8. second hydraulic cylinder, 9. connecting plate, 10. main placement seat, 11. annular water bag, 12. limiting telescopic rod, 13. water tank, 14. center buckle seat, 15. water pump, 16. water inlet pipe, 17. water outlet pipe, 18. water outlet valve, 19. rubber coating layer, 20. block, 21. L-shaped bracket, 22. first cylinder, 23. splint, 24. first guide rod, 25. second guide rod, 26. motor, 27. driving gear, 28. rotating shaft, 29. driven gear, 30. fixed sleeve, 31. hardness tester, 32. isolation sleeve, 33. iron sleeve, 34. limiting plate, 35. pressure sensor, 36. second cylinder, 37. electromagnet, 38. protective telescopic rod. DETAILED DESCRIPTION

[0040] The present invention will be described in detail below with reference to the accompanying drawings. Figure 1-10 As shown, a device for detecting the hardness of metal matrix composite materials.

[0041] Through the use of wires by those skilled in the art, all electrical components in this case are connected to their corresponding power supplies, and appropriate controllers should be selected according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the following working principle, in which the electrical components are electrically connected in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0042] Embodiment: A metal matrix composite material hardness testing device comprises a base 1, a shield 2 and a door 3, wherein the shield 2 is mounted on the upper wall of the base 1, the door 3 is movably mounted at the opening of the shield 2, and a detection structure is provided on the base 1;

[0043] It should be noted that: the base 1 is used to install the detection structure, the shield 2 shields and protects the detection structure and the metal matrix composite material sample to prevent the sample and the detection structure from being damaged by foreign objects colliding with the sample during the test, and the box door 3 is used to place and take out the metal matrix composite material sample;

[0044] In the specific implementation process, the detection structure can preferably adopt the following structure, which includes: two slides 4, two sliding seats 5, two racks 6, two first hydraulic cylinders 7, two placement parts, two clamping parts, a transposition part, two second hydraulic cylinders 8, a connecting plate 9 and two measuring parts; the two slides 4 are embedded in the upper wall surface of the base 1, the two sliding seats 5 are movably installed on the two slides 4, the two racks 6 are installed on the opposite walls of the two sliding seats 5, the two first hydraulic cylinders 7 are respectively installed on the upper walls of the two sliding seats 5, the two placement parts are installed on the telescopic ends of the two first hydraulic cylinders 7, the two clamping parts are respectively installed on the fixed ends of the two first hydraulic cylinders 7, the transposition part is installed on the upper wall surface of the base 1, the two second hydraulic cylinders 8 are installed on the upper wall surface of the base 1, the connecting plate 9 is installed on the telescopic ends of the two second hydraulic cylinders 8, and the two measuring parts are installed on the connecting plate 9 corresponding to the two slides 4;

[0045] It should be noted that: two samples are placed on the two placement parts respectively, the two clamping parts work to clamp the two samples, the two second hydraulic cylinders 8 contract, and the connecting plate 9 drives the two measuring parts to descend to fit the samples, and the hardness test of the samples is performed;

[0046] In the specific implementation process, the two placement parts can preferably adopt the following structure, which includes: a main placement seat 10, an annular groove, two first semi-arc grooves, an annular water bag 11, several limiting telescopic rods 12, a water tank 13, a water control component, a center buckle seat 14, two second semi-arc grooves and a positioning component; the main placement seat 10 is installed on the telescopic end of the first hydraulic cylinder 7, the annular groove is opened on the main placement seat 10, the two first semi-arc grooves are opened on the main placement seat 10, the annular water bag 11 is installed on the annular groove, several limiting telescopic rods 12 are inserted into the annular water bag 11 in an array, and several limiting telescopic rods 12 are installed on the annular groove, the water tank 13 is installed at the center of the main placement seat 10, the water control component is installed on the water tank 13 and the annular water bag 11, the center buckle seat 14 is installed on the main placement seat 10, the two second semi-arc grooves and the two first semi-arc grooves are opened on the center buckle seat 14 corresponding to each other, and the positioning component is installed on the main placement seat 10 and the center buckle seat 14;

[0047] It should be noted that the central buckle seat 14 is connected to the main placement seat 10 through a positioning assembly and is used to place samples. Before placing the samples, the water control assembly works to allow water in the water tank 13 to flow into the annular water bag 11. As the water level in the annular water bag 11 gradually increases, the plurality of limiting telescopic rods 12 extend and the annular water bag 11 swells, making the upper wall of the annular water bag 11 higher than the upper walls of the main placement seat 10 and the central buckle seat 14, and the sample is placed on the annular water bag 11;

[0048] In the specific implementation process, the water control component can preferably adopt the following structure, which includes: a water pump 15, a water inlet pipe 16, a water outlet pipe 17 and a water outlet valve 18; the water pump 15 is installed inside the water tank 13, the water inlet pipe 16 is inserted on the side wall of the water tank 13, and one end of the water inlet pipe 16 is connected to the water pump 15, and the other end of the water inlet pipe 16 is inserted on the annular water bag 11, one end of the water outlet pipe 17 is inserted on the side wall of the water tank 13, and the other end of the water outlet pipe 17 is inserted on the annular water bag 11, and the water outlet valve 18 is installed at one end of the water outlet pipe 17, and the two first semi-arc grooves and the two second semi-arc grooves are used to limit the water inlet pipe 16 and the outlet pipe 17;

[0049] It should be noted that: the water valve is closed, the water pump 15 is working, and the water in the water tank 13 enters the annular water bag 11 through the water inlet pipe 16, causing the annular water bag 11 to bulge;

[0050] As a preference, further, a rubber coating layer 19 is provided between the annular groove and the annular water bag 11 for fixing the annular water bag 11;

[0051] In the specific implementation process, the positioning assembly can preferably adopt the following structure, which includes: four grooves and four clamping blocks 20; the four grooves are opened on the main placement seat 10, and the four clamping blocks 20 are installed on the central buckle seat 14 in a matching manner with the four grooves;

[0052] It should be noted that: align the four clamping blocks 20 on the central buckle seat 14 with the four grooves on the main placement seat 10, and insert the four clamping blocks 20 into the four grooves to connect the main placement seat 10 with the central buckle seat 14;

[0053] In a specific implementation, both clamping parts may preferably adopt the following structure, which includes: four L-shaped brackets 21, four first cylinders 22, four clamping plates 23, and four pairs of first guide rods 24; the four L-shaped brackets 21 are installed in a circular array on the fixed end of the first hydraulic cylinder 7, the four first cylinders 22 are respectively inserted into the four L-shaped brackets 21, the four clamping plates 23 are installed at the telescopic ends of the four first cylinders 22, the four pairs of first guide rods 24 are installed on the four clamping plates 23, and the four pairs of first guide rods 24 are movably inserted into the four L-shaped brackets 21;

[0054] It should be noted that: after the sample is placed on the annular water bag 11, the four first cylinders 22 extend, so that the four clamps 23 push the sample to move on the annular water bag 11 until the sample is clamped. The annular water bag 11 serves to isolate the sample from the main placement seat 10 and the center buckle seat 14. When the sample is placed and moved, it prevents the sample and the main placement seat 10 and the center buckle seat 14 from wearing each other, ensuring the quality of the sample and the quality of the equipment. The first guide rod 24 serves to protect the telescopic end of the first cylinder 22. After the sample is clamped, the water outlet valve 18 is opened, and the water in the annular water bag 11 flows back to the water tank 13 through the outlet pipe 17. The height of the annular water bag 11 becomes smaller, and then the first cylinder 22 extends, so that the main placement seat 10 and the center buckle seat 14 fit the sample to support the sample;

[0055] As a preferred embodiment, further, a second guide rod 25 is movably mounted on each of the four L-shaped brackets 21. One end of the second guide rod 25 is fixedly mounted on the lower wall of the main placement seat 10, and the other end of the second guide rod 25 is movably mounted on the upper wall of the sliding seat 5 to balance the main placement seat 10 and then perform hardness testing.

[0056] In a specific implementation, the transposition portion may preferably adopt the following structure, which includes: a motor 26, a driving gear 27, a rotating shaft 28, and a driven gear 29; the motor 26 is mounted on the base 1, the driving gear 27 is sleeved on the driving end of the motor 26, the rotating shaft 28 is movably inserted on the base 1, and the driven gear 29 and the driving gear 27 are mounted on the rotating shaft 28 so as to mesh with each other, and the driven gear 29 and the driving gear 27 are respectively meshed with the two racks 6;

[0057] It should be noted that after testing the hardness of a point, the motor 26 starts to work, driving the driving gear 27 to rotate, and the driven gear 29 rotates accordingly, and the two sliding seats 5 move on the two slide grooves 4 through the two racks 6, so that another position of the sample is aligned with the measuring part, and then the hardness test is carried out;

[0058] In the specific implementation process, both measuring parts can preferably adopt the following structure, which includes: a fixed sleeve 30, a hardness tester 31, an isolation sleeve 32, an iron sleeve 33, two limit plates 34, a pressure sensor 35 and a clamping assembly; the fixed sleeve 30 is inserted into the connecting plate 9, the hardness tester 31 is movably inserted into the fixed sleeve 30, the isolation sleeve 32 is sleeved on the hardness tester 31, the iron sleeve 33 is sleeved on the isolation sleeve 32, the two limit plates 34 are longitudinally sleeved on the iron sleeve 33, and the two limit plates 34 are located inside the fixed sleeve 30, the pressure sensor 35 is installed on the upper wall surface of the two limit plates 34, and the clamping assembly is installed on the inner wall surface of the fixed sleeve 30;

[0059] It should be noted that: the hardness tester 31 can have a space for moving up and down in the fixed sleeve 30 through the limitation of the two limit plates 34. When the height values ​​of the two samples are the same, the second hydraulic cylinder 8 contracts to make the hardness tester 31 fit the sample. When the pressure sensor 35 detects the pressure value, the second hydraulic cylinder 8 stops contracting. At this time, the upper limit plate 34 fits the fixed sleeve 30 and reaches the limit position. Then the clamping assembly clamps the hardness tester 31, and the hardness tester 31 performs hardness testing. When the height values ​​of the two samples are different, the second hydraulic cylinder 8 contracts to make one of the two pressure sensors 35 detect the pressure value. The second hydraulic cylinder 8 stops contracting. At this time, the hardness tester 31 on the side of the pressure sensor 35 that detects the pressure value fits on the higher sample, and the other hardness tester 31 fits on the shorter sample to perform hardness testing.

[0060] In a specific implementation, the clamping assembly may preferably adopt the following structure, which includes: four second cylinders 36 and four electromagnets 37; the four second cylinders 36 are installed in a circular array on the inner wall of the fixed sleeve 30, and the four electromagnets 37 are respectively installed on the telescopic ends of the four second cylinders 36;

[0061] It should be noted that: the four second cylinders 36 are extended, the four electromagnets 37 are energized, clamping the iron sleeve 33 to fix the hardness tester 31, and the isolation sleeve 32 is used to isolate the iron sleeve 33 from the hardness tester 31;

[0062] Preferably, further, a plurality of protective telescopic rods 38 are provided between the fixed sleeve 30 and the iron sleeve 33 for protecting the telescopic end of the cylinder.

[0063] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Any changes that may be made to certain parts thereof by those skilled in the art all reflect the principles of the present invention and fall within the scope of protection of the present invention.

Claims

1. A metal matrix composite material hardness testing device, comprising a base (1), a shield (2) and a door (3), wherein the shield (2) is mounted on the upper wall of the base (1), and the door (3) is movably mounted at the opening of the shield (2), characterized in that: The base (1) is provided with a detection structure; The detection structure comprises: two slide grooves (4), two sliding seats (5), two racks (6), two first hydraulic cylinders (7), two placement parts, two clamping parts, a transposition part, two second hydraulic cylinders (8), a connecting plate (9) and two measuring parts; The two slide grooves (4) are embedded in the upper wall surface of the base (1), the two sliding seats (5) are movably installed on the two slide grooves (4), the two racks (6) are installed on the opposite wall surfaces of the two sliding seats (5), the two first hydraulic cylinders (7) are installed on the upper wall surfaces of the two sliding seats (5), the two placement parts are installed on the telescopic ends of the two first hydraulic cylinders (7), the two clamping parts are installed on the fixed ends of the two first hydraulic cylinders (7), the transposition part is installed on the upper wall surface of the base (1), the two second hydraulic cylinders (8) are installed on the upper wall surface of the base (1), the connecting plate (9) is installed on the telescopic ends of the two second hydraulic cylinders (8), and the two measuring parts and the two slide grooves (4) are installed on the connecting plate (9) in correspondence with each other; The two placement parts each include: a main placement seat (10), an annular groove, two first semi-arc grooves, an annular water bag (11), a plurality of position-limiting telescopic rods (12), a water tank (13), a water control component, a central buckle seat (14), two second semi-arc grooves, and a positioning component; The main placement seat (10) is installed on the telescopic end of the first hydraulic cylinder (7), the annular groove is opened on the main placement seat (10), two of the first semi-arc grooves are opened on the main placement seat (10), the annular water bag (11) is installed on the annular groove, a plurality of the limiting telescopic rods (12) are inserted into the annular water bag (11) in an array, and a plurality of the limiting telescopic rods (12) are installed on the annular groove, the water tank (13) is installed at the center of the main placement seat (10), the water control component is installed on the water tank (13) and the annular water bag (11), the center buckle seat (14) is installed on the main placement seat (10), two of the second semi-arc grooves and two of the first semi-arc grooves are opened on the center buckle seat (14) corresponding to each other, and the positioning component is installed on the main placement seat (10) and the center buckle seat (14); The two clamping parts each comprise: four L-shaped brackets (21), four first cylinders (22), four clamping plates (23), and four pairs of first guide rods (24); The four L-shaped brackets (21) are mounted on the fixed end of the first hydraulic cylinder (7) in a circular array, the four first cylinders (22) are respectively inserted on the four L-shaped brackets (21), the four clamps (23) are mounted on the telescopic ends of the four first cylinders (22), the four pairs of the first guide rods (24) are mounted on the four clamps (23), and the four pairs of the first guide rods (24) are movably inserted on the four L-shaped brackets (21).

2. A metal matrix composite material hardness testing device according to claim 1, characterized in that: The water control assembly comprises: a water pump (15), a water inlet pipe (16), a water outlet pipe (17), and a water outlet valve (18); The water pump (15) is installed inside the water tank (13), the water inlet pipe (16) is inserted on the side wall of the water tank (13), and one end of the water inlet pipe (16) is connected to the water pump (15), and the other end of the water inlet pipe (16) is inserted on the annular water bag (11), one end of the water outlet pipe (17) is inserted on the side wall of the water tank (13), and the other end of the water outlet pipe (17) is inserted on the annular water bag (11), and the water outlet valve (18) is installed on one end of the water outlet pipe (17), and the two first semi-arc grooves and the two second semi-arc grooves are used to limit the water inlet pipe (16) and the water outlet pipe (17).

3. The metal matrix composite material hardness testing device according to claim 1, characterized in that: A rubber coating layer (19) is provided between the annular groove and the annular water bag (11).

4. The metal matrix composite material hardness testing device according to claim 1, characterized in that: The positioning assembly comprises: four grooves and four clamping blocks (20); The four grooves are opened on the main placement seat (10), and the four clamping blocks (20) are mounted on the central buckle seat (14) in a matching manner with the four grooves.

5. The metal matrix composite material hardness testing device according to claim 1, characterized in that: A second guide rod (25) is movably mounted on each of the four L-shaped brackets (21), one end of the second guide rod (25) is fixedly mounted on the lower wall of the main placement seat (10), and the other end of the second guide rod (25) is movably mounted on the upper wall of the sliding seat (5).

6. The metal matrix composite material hardness testing device according to claim 1, characterized in that: The transposition part includes: a motor (26), a driving gear (27), a rotating shaft (28) and a driven gear (29); The motor (26) is mounted on the base (1), the driving gear (27) is sleeved on the driving end of the motor (26), the rotating shaft (28) is movably inserted on the base (1), the driven gear (29) and the driving gear (27) are mounted on the rotating shaft (28) in a manner that they mesh with each other, and the driven gear (29) and the driving gear (27) are respectively meshed with the two racks (6).

7. The metal matrix composite material hardness testing device according to claim 1, characterized in that: The two measuring parts each include: a fixed sleeve (30), a hardness tester (31), an isolation sleeve (32), an iron sleeve (33), two limit plates (34), a pressure sensor (35) and a clamping assembly; The fixed sleeve (30) is inserted into the connecting plate (9), the hardness tester (31) is movably inserted into the fixed sleeve (30), the isolation sleeve (32) is sleeved on the hardness tester (31), the iron sleeve (33) is sleeved on the isolation sleeve (32), the two limiting plates (34) are longitudinally sleeved on the iron sleeve (33), and the two limiting plates (34) are located inside the fixed sleeve (30), the pressure sensor (35) is installed on the upper wall of the two limiting plates (34), and the clamping assembly is installed on the inner wall of the fixed sleeve (30).

8. The metal matrix composite material hardness testing device according to claim 7, characterized in that: The clamping assembly comprises: four second cylinders (36) and four electromagnets (37); The four second cylinders (36) are mounted in a circular array on the inner wall of the fixed sleeve (30), and the four electromagnets (37) are respectively mounted on the telescopic ends of the four second cylinders (36).

9. The metal matrix composite material hardness testing device according to claim 8, characterized in that: A plurality of protective telescopic rods (38) are provided between the fixed sleeve (30) and the iron sleeve (33).

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