Magnetostrictive material performance testing device

Abstract

The utility model relates to the field of rare earth material research and test, and provides a magnetostrictive material performance testing device, which comprises a fixed base, a fixed base, a fixed base and a movable base, the temperature-controllable testing mechanism is configured on the mounting position, is internally provided with an accommodating space and can provide required temperature and magnetic field for the to-be-tested material; the to-be-tested material mounting mechanism is configured in the accommodating space and is provided with a placement space, and the placement space is used for accommodating the to-be-tested material; the universal stretcher is arranged on the fixed base and is connected with the to-be-tested material mounting mechanism; and the displacement detection mechanism is used for detecting the displacement generated by the to-be-detected material. The device can be used for measuring the output characteristics of the material under the action of coupling variables, is easy to install and low in cost, avoids the problem that a certain variable is ignored in the test process of the existing test equipment, and ensures the reliability of test data.

Description

Technical Field

[0001] The utility model relates to the field of rare earth material research and testing, and in particular to a magnetostrictive material performance testing device. Background Art

[0002] Rare earth giant magnetostrictive materials and their devices are of major national concern. In recent years, the National Key R&D Program has launched a key project on "Rare Earth New Materials." This initiative addresses the urgent demand for rare earth new materials in fields such as next-generation information technology, aerospace, advanced rail transit, energy-saving and new energy vehicles, high-end medical devices, and advanced manufacturing. The program aims to develop rare earth new materials that are unique to my country's resources and meet urgent technological needs. The program also aims to strengthen the foundation of cutting-edge rare earth new materials technologies, as well as their engineering and application. This will enhance original innovation capabilities and high-end applications.

[0003] However, the material properties of rare earth giant magnetostrictive materials are complex, and their physical properties are affected by the coupling of external magnetic field, loading stress and working environment temperature. Most existing testing devices for rare earth giant magnetostrictive materials can only meet the needs of testing one or two variables. Therefore, it is urgent to design a testing device that can meet the needs of coupling detection of various variables. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a device for testing the performance of magnetostrictive materials.

[0005] According to the utility model, a magnetostrictive material performance testing device is provided, comprising:

[0006] A fixed base with a mounting position;

[0007] A temperature-controllable testing mechanism, which is arranged at the installation position and has an internal accommodation space, and is capable of providing the required temperature and magnetic field for the material to be tested;

[0008] A test material installation mechanism is arranged in the accommodating space and has a placement space, wherein the placement space is used to accommodate the test material;

[0009] A universal stretching machine, arranged on the fixed base and connected to the mounting mechanism for the material to be tested;

[0010] The displacement detection mechanism is used to detect the displacement generated by the material to be tested, wherein the stress required to be loaded on the material to be tested is loaded by the material to be tested mounting mechanism and / or a universal stretching machine.

[0011] Preferably, the material to be tested installation mechanism includes a material to be tested fixing component and a fixing bracket, the fixing bracket is configured on the installation position, the material to be tested fixing component is set on the fixing bracket, the material to be tested fixing component has a placement space, and the material to be tested is configured in the placement space.

[0012] Preferably, the material fixing assembly to be tested is provided with a stress loading assembly, an output assembly, and an electromagnetic coil driver. The output assembly and the stress loading assembly are respectively arranged at the top and bottom of the material fixing assembly to be tested. The electromagnetic coil driver provides a stable electromagnetic field for the material to be tested and is connected to a controllable current source arranged outside the material fixing assembly to be tested.

[0013] Preferably, the temperature-controllable testing mechanism has an external shell, which includes an insulating top plate, an insulating bottom plate, an insulating front plate, an insulating front plate, and insulating side plates arranged at the front end, respectively. The insulating top plate, the insulating front plate, the insulating side plates, and the insulating bottom plate together form a closed external shell.

[0014] Preferably, the temperature-controllable test mechanism is provided with a temperature control component, and the temperature inside the controllable test mechanism is controlled in real time by the temperature control component.

[0015] Preferably, the temperature control assembly includes a temperature heater and a temperature sensor arranged inside the external shell, and a temperature controller arranged outside the external shell, and the temperature heater and the temperature sensor are connected to the temperature controller via a connecting cable.

[0016] Preferably, the outer shell is made of heat-insulating material, and the heat-insulating top plate is made of transparent material.

[0017] Preferably, the universal stretching machine includes a stretching machine bracket, a movable component, a tension and pressure loading component and a force sensor, the lower end of the stretching machine bracket is set on the fixed base, the movable component is configured at the upper end of the stretching machine bracket, the top end of the tension and pressure loading component is configured on the movable component, the bottom end of the tension and pressure loading component is connected to the top end of the test material fixing component of the test material fixing component, and the force sensor is arranged between the tension and pressure loading component and the test material fixing component.

[0018] Preferably, the two ends of the movable component can slide up and down along the stretching machine bracket under the drive of the power source, thereby driving the tensile and compressive loading components to move closer to or away from the fixed component of the material to be tested, thereby changing the stress loaded on the material to be tested.

[0019] Preferably, the output assembly includes a guide bearing and an output shaft passing through the guide bearing, the guide bearing provides axial movement limit for the output shaft, one end of the output shaft is connected to the material to be tested, and the other end of the output shaft is connected to the universal stretching machine;

[0020] The stress loading assembly includes a structural part with a nut, a loading bolt that cooperates with the nut thread, and a butterfly spring arranged at the end of the loading bolt. By rotating the position of the loading bolt on the structural part, the pre-compression stress loaded by the butterfly spring on the material to be tested can be adjusted to achieve the adjustment of the preload force.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The utility model aims to measure the output characteristics of rare earth giant magnetostrictive materials under the influence of magnetic field, stress and temperature coupling, and is simple to install and low in cost. It avoids the problem of existing test equipment ignoring a certain variable during the test process, ensures the reliability of test data, and provides a reliable device for the research and calibration of rare earth giant magnetostrictive materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of the outer shell of the temperature controllable test mechanism;

[0026] Figure 3 Schematic diagram of the internal structure of the temperature controllable test mechanism;

[0027] Figure 4 It is a structural diagram of the installation mechanism of the material to be tested;

[0028] Figure 5 This is a schematic structural diagram of Example 2;

[0029] Figure 6 It is a structural diagram of a universal stretching machine;

[0030] Figure 7 This is a schematic structural diagram of Example 3;

[0031] Figure 8 Schematic diagram of the structural cross-section of the fixing component of the material to be tested.

[0032] The figure shows:

[0033] Temperature controlled testing facility 1

[0034] Insulation roof 11

[0035] Insulation front panel 12

[0036] Insulation side panels 13

[0037] Insulation base plate 14

[0038] Wire module 15

[0039] Temperature heater 16

[0040] Temperature sensor 17

[0041] Temperature controller 18

[0042] Temperature monitor 19

[0043] Universal stretching machine 2

[0044] Stretching machine bracket 21

[0045] Removable component 22

[0046] Tension and pressure loading components 23

[0047] Force sensor 24

[0048] Displacement detection mechanism 3

[0049] Fixed base 4

[0050] Material installation mechanism 5

[0051] Material to be tested 50

[0052] Material fixing component 51

[0053] Fixed bracket 52

[0054] Controllable current source 53

[0055] Electromagnetic coil driver 54

[0056] Output component 55

[0057] Stress loading component 56 DETAILED DESCRIPTION

[0058] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art further understand the present invention, but are not intended to limit the present invention in any way. It should be noted that a person skilled in the art may make various variations and improvements without departing from the scope of the present invention. Such variations and improvements are all within the scope of protection of the present invention.

[0059] Example 1:

[0060] The utility model provides a magnetostrictive material performance testing device for measuring the output characteristics of rare earth giant magnetostrictive materials under the coupling influence of external magnetic field, loading stress and ambient temperature, such as Figure 1 As shown, the apparatus comprises a temperature-controllable testing mechanism 1, a universal stretching machine 2, a displacement detection mechanism 3, a fixed base 4, and a test material mounting mechanism 5. The fixed base 4 has a mounting position. The temperature-controllable testing mechanism 1 is configured on the mounting position. The temperature-controllable testing mechanism 1 has an internal accommodation space capable of providing the required temperature and magnetic field for the test material 50. The test material 50 is a magnetostrictive material. The test material mounting mechanism 5 is used to mount and secure the test material 50, that is, the test material mounting mechanism 5 is mounted in the internal accommodation space of the temperature-controllable testing mechanism 1. The universal stretching machine 2 is configured on the fixed base 4 and connected to the test material mounting mechanism 5. The displacement detection mechanism 3 is used to detect the displacement of the test material 50. The specific structure of the displacement detection mechanism 3 adopts existing technology, preferably a solid sensor for detecting strain changes such as a laser displacement sensor or an eddy current sensor. The universal stretching machine 2 and the displacement detection mechanism 3 are both directly or indirectly fixed to the fixed base 4. The stress required to be applied to the test material 50 is applied by the test material mounting mechanism 5 or the universal stretching machine 2.

[0061] like Figure 2 As shown, the temperature-controllable test mechanism 1 has an external shell, which includes an insulating top plate 11, an insulating front plate 12, insulating side plates 13 and an insulating bottom plate 14. The insulating top plate 11, the insulating front plate 12, the insulating side plates 13 and the insulating bottom plate 14 are all made of materials with good thermal insulation properties. For example, the external shell is composed of an integrally formed material with good thermal insulation properties. Specifically, the thermal insulation material can be a material with low thermal conductivity and high temperature resistance such as graphite material, polyurethane foam material, gypsum board, etc. The insulating top plate 11 is made of transparent material, which can observe the internal situation of the test box in real time; a wire module 15 is installed on the external shell, and the wire module 15 is used to lead out the connecting cables between the internal components and the external components, such as Figure 3 As shown, the temperature control component includes a temperature heater 16, a temperature sensor 17, a temperature controller 18 and a temperature monitor 19. A accommodating space is formed inside the external shell. The temperature heater 16, the temperature sensor 17 and the temperature monitor 19 are arranged inside the accommodating space. The temperature controller 18 is arranged outside the external shell. The temperature heater 16, the temperature sensor 17 and the temperature monitor 19 are all connected to the temperature controller 18 through connecting cables. The connecting cables all enter and exit through the wire module 15. The temperature control component controls the temperature inside the temperature-controllable test mechanism 1 in real time.

[0062] like Figure 6As shown, the universal stretching machine 2 includes a stretching machine frame 21, a movable assembly 22, a tensile and compressive loading assembly 23, and a force sensor 24. The lower end of the stretching machine frame 21 is mounted on a fixed base 4, the movable assembly 22 is mounted on the upper end of the stretching machine frame 21, the top end of the tensile and compressive loading assembly 23 is mounted on the movable assembly 22, and the bottom end of the tensile and compressive loading assembly 23 is connected to the top end of the test material fixed assembly 51. Driven by a power source, the ends of the movable assembly 22 can slide up and down along the stretching machine frame 21, thereby driving the tensile and compressive loading assembly 23 toward or away from the test material fixed assembly 51, thereby varying the stress applied to the test material 50. By controlling the movable assembly 22, the stress applied by the tensile and compressive loading assembly 23 to the test rare earth giant magnetostrictive material is adjusted in real time and detected in real time by the force sensor 24. The power source can be implemented using a conventional drive device.

[0063] like Figure 4 As shown, the test material mounting mechanism 5 includes a test material fixing assembly 51, a fixing bracket 52, and a controllable current source 53. The fixing bracket 52 is configured at the mounting position and preferably has an L-shaped cross-section. The test material fixing assembly 51 is disposed on the fixing bracket 52. The test material fixing assembly 51 has a placement space, and the test material 50 is disposed in the placement space. For example, the test material fixing assembly 51 comprises two supports fixed to the fixing bracket 52, and the gap between the two supports forms the placement space. An electromagnetic coil driver 54 is disposed on the test material fixing assembly 51. The electromagnetic coil driver 54 is arranged along the circumference of the test material 50. The electromagnetic coil driver 54 is connected to a controllable current source 53 disposed outside the test material fixing assembly 51. By controlling the controllable current source 53, the electromagnetic coil driver 54 can provide a stable electromagnetic field for the test material 50. The test sample of the magnetostrictive material to be tested is preferably in the shape of a rod, but can also be designed with a circular, rectangular or other polygonal cross-section. The electromagnetic coil driver 54 is preferably a multi-turn solenoid coil or other device that provides an electromagnetic field under the action of current or voltage. A stress loading assembly 56 is provided at the bottom of the test material fixing assembly 51 to provide a certain preload force for the test material 50. The stress loading assembly 56 in this embodiment includes a structural member with a nut, a loading bolt and a butterfly spring, such as Figure 8 As shown, by rotating the loading bolt on the structural member, the preload force can be adjusted by adjusting the preload stress applied by the butterfly spring to the cross-section of the test material 50. It should be noted that in actual applications, the stress loading assembly 56 can be arranged at either the bottom or the top of the test material 50. The specific design can be flexibly adjusted according to the actual application scenario to meet product needs.

[0064] Furthermore, an output component 55 is provided on the top of the material fixing component 51 to be tested, such as Figure 8As shown, the output component 55 includes an output shaft and a guide bearing. The output shaft passes through the guide bearing. The guide bearing provides axial movement limit for the output shaft. The output shaft is coaxially connected to the sample of the material to be tested 50. The stress loading component 56 makes the output shaft and the sample of the material to be tested 50 fit tightly, and directly transmits the output strain of the sample of the material to be tested 50. When the material to be tested 50 generates output under the action of the electromagnetic coil, the displacement detection mechanism 3 and / or the force sensor 24 extracts the detection data of displacement and / or force to obtain the output of displacement or force.

[0065] Example 2:

[0066] This embodiment is a preferred example of embodiment 1.

[0067] like Figure 5 As shown, the temperature-controllable testing mechanism 1 can be directly used in conjunction with the displacement detection mechanism 3 to measure the material properties of the material to be tested 50 at different temperatures; the stress is provided by the stress loading component 56.

[0068] Example 3:

[0069] This embodiment is a preferred example of Embodiment 1.

[0070] like Figure 7 As shown, the universal stretching machine 2 can be directly connected to the test material mounting mechanism 5 to measure the material properties of the test material 50 under different stress conditions. At this time, the stress is applied by the tension and pressure loading assembly 23.

[0071] by Figure 1 For example, the working principle of the present invention is as follows:

[0072] The material to be tested 50 is clamped onto the material to be tested fixing assembly 51, and the material to be tested mounting mechanism 5 is assembled to the inside of the external shell. According to the test requirements, stress is applied to the material to be tested 50 through the tension and pressure loading assembly 23, and the temperature inside the external shell is adjusted through the temperature control assembly, and the controllable current source 53 is controlled to make the electromagnetic coil driver 54 generate a magnetic field, and the various data collected are recorded. Test data is collected in multiple scenarios by changing the temperature, stress and magnetic field. The utility model is flexible in testing and can be directly connected to an external displacement and stress testing device, reducing the cost of the entire device and improving the applicability of the device. The temperature control assembly, stress loading assembly 56 and displacement detection mechanism 3 in the utility model can be used optionally, which ensures that the test device can adapt to different needs. Each component can be used by simple installation and connection, and the structure is flexible and highly applicable.

[0073] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0074] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A magnetostrictive material performance testing device, characterized in that: include: A fixed base (4) having a mounting position; A temperature-controllable testing mechanism (1), which is arranged on the installation position and has an internal accommodation space, and is capable of providing the required temperature and magnetic field for the material to be tested (50); A test material installation mechanism (5) is arranged in the accommodating space and has a placement space, wherein the placement space is used to accommodate the test material (50); A universal stretching machine (2) is arranged on the fixed base (4) and connected to the test material mounting mechanism (5); The displacement detection mechanism (3) is used to detect the displacement generated by the material to be tested (50), wherein the stress required to be loaded on the material to be tested (50) is loaded by the material to be tested mounting mechanism (5) and / or the universal stretching machine (2).

2. The magnetostrictive material performance testing device according to claim 1, characterized in that: The material to be tested installation mechanism (5) comprises a material to be tested fixing assembly (51) and a fixing bracket (52), wherein the fixing bracket (52) is arranged on the installation position, and the material to be tested fixing assembly (51) is arranged on the fixing bracket (52).

3. The magnetostrictive material performance testing device according to claim 2, characterized in that: The material-to-be-tested fixing assembly (51) is provided with a stress loading assembly (56), an output assembly (55), and an electromagnetic coil driving body (54). The output assembly (55) and the stress loading assembly (56) are respectively provided at the top and the bottom of the material-to-be-tested fixing assembly (51). The electromagnetic coil driving body (54) provides a stable electromagnetic field for the material-to-be-tested (50) and is connected to a controllable current source (53) provided outside the material-to-be-tested fixing assembly (51).

4. The magnetostrictive material performance testing device according to claim 1, characterized in that: The temperature-controllable test mechanism (1) has an external shell, which includes a heat-insulating top plate (11) and a heat-insulating bottom plate (14) arranged at the top and bottom, respectively, a heat-insulating front plate (12) arranged at the front end, and heat-insulating side plates (13) surrounding the sides. The heat-insulating top plate (11), the heat-insulating front plate (12), the heat-insulating side plates (13), and the heat-insulating bottom plate (14) together form a closed box.

5. The magnetostrictive material performance testing device according to claim 4, characterized in that: The temperature-controllable test mechanism (1) is provided with a temperature control component, and the temperature inside the controllable test mechanism (1) is controlled in real time by the temperature control component.

6. The magnetostrictive material performance testing device according to claim 5, characterized in that: The temperature control assembly includes a temperature heater (16) and a temperature sensor (17) arranged inside the external shell, and a temperature controller (18) arranged outside the external shell. The temperature heater (16) and the temperature sensor (17) are connected to the temperature controller (18) via a connecting cable.

7. The magnetostrictive material performance testing device according to claim 4, characterized in that: The outer shell is made of a heat-insulating material, and the heat-insulating top plate (11) is made of a transparent material.

8. The magnetostrictive material performance testing device according to claim 2, characterized in that: The universal stretching machine (2) includes a stretching machine bracket (21), a movable component (22), a tension and pressure loading component (23) and a force sensor (24), wherein the lower end of the stretching machine bracket (21) is arranged on the fixed base (4), the movable component (22) is arranged on the upper end of the stretching machine bracket (21), the top end of the tension and pressure loading component (23) is arranged on the movable component (22), the bottom end of the tension and pressure loading component (23) is connected to the top end of the test material fixing component (51) of the test material fixing component (51), and the force sensor (24) is arranged between the tension and pressure loading component (23) and the test material fixing component (51).

9. The magnetostrictive material performance testing device according to claim 8, characterized in that: The two ends of the movable component (22) can slide up and down along the stretching machine bracket (21) under the drive of the power source, thereby driving the tensile and compressive loading component (23) to move closer to or away from the test material fixing component (51), thereby being able to change the stress loaded on the test material (50).

10. The magnetostrictive material performance testing device according to claim 3, characterized in that: The output assembly (55) includes a guide bearing and an output shaft passing through the guide bearing, the guide bearing provides an axial motion limit for the output shaft, one end of the output shaft is connected to the material to be tested (50), and the other end of the output shaft is connected to the universal stretching machine (2); The stress loading assembly (56) comprises a structural member with a nut, a loading bolt threadedly engaged with the nut, and a butterfly spring arranged at the end of the loading bolt. By rotating the position of the loading bolt on the structural member, the pre-compression stress applied by the butterfly spring on the material to be tested (50) can be adjusted, thereby achieving adjustment of the pre-load force.

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