Ultrahigh-temperature monofilament mechanical loading platform, vacuum test device and test method

Abstract

The invention discloses an ultra-high-temperature monofilament mechanical loading platform, a vacuum test device and a test method, and relates to the technical field of detection devices, in particular to an ultra-high-temperature monofilament mechanical loading platform comprising a tension loading module comprising two groups of moving cross beams moving oppositely or oppositely, a driving module for driving the moving cross beams to move, and a monofilament clamp, the movable cross beam is connected with the monofilament clamp through a sensor assembly; according to the ultrahigh-temperature monofilament mechanical loading platform, the vacuum test device and the test method, heat radiation generated by heating of the heating body is adopted to heat the workpiece, the problem of limitation on the material quality of the workpiece and the problem of uneven heating in the workpiece test process are solved, the heat preservation module is additionally arranged, the test temperature can be continuously increased, and the test efficiency is improved. According to the clamping tool, the ultrahigh-temperature environment of 2000 DEG C in a narrow space can be achieved, meanwhile, the groove body horizontally arranged in the heating body is adopted for bearing a workpiece, the influence of the clamping tool on workpiece drawing force measurement is reduced, the testing precision is guaranteed, and then the effectiveness of a testing result is promoted to be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and more specifically, to an ultra-high temperature monofilament mechanical loading platform. In addition, the present invention also relates to a vacuum testing device including the ultra-high temperature monofilament mechanical loading platform. At the same time, the present invention also relates to a testing method applied to the vacuum testing device. Background Art

[0002] In recent years, with the development of national economy, aerospace technology, national defense and military industry, monofilament materials such as carbon fiber, silicon carbide ceramic fiber and glass fiber are increasingly used in composite materials. As the main load-bearing skeleton of composite materials, the performance of monofilament fiber determines the excellent performance of the material. Therefore, the research on the mechanical properties of monofilament materials in extremely complex environments is becoming more and more critical, and the mechanical response of the material is relatively closely related to the ambient temperature.

[0003] The high temperature testing machine in the prior art has the following disadvantages:

[0004] 1. The temperature can only reach 1500℃, and the test conditions for higher temperatures cannot be met;

[0005] 2. There are some restrictions on the material properties of the single-filament sample. When using the electric heating method, the sample needs to be a conductive material;

[0006] 3. If the workpiece is heated by electricity, the end of the workpiece needs to be powered by the clamping body, which causes differences in the heat dissipation performance of the clamping part and the non-clamping part of the workpiece. At the same time, when the workpiece is stretched and the diameter is changed, the resistance values ​​at different positions are different, that is, the heat generation at different positions is different, resulting in uneven heating of the workpiece, which in turn leads to inaccurate test results of its tensile performance at high temperature;

[0007] 4. Most of the existing single-wire testing devices are vertical structures, and the workpiece is electrically heated, that is, a power supply wire assembly needs to be added to the clamping end of the workpiece, which has a certain gravity, affecting the accuracy of the internal sensor in measuring the pull-out force of the workpiece.

[0008] In summary, how to solve the problems that the existing test equipment cannot reach higher test temperatures, and solve the problems of workpiece material limitations, uneven heating of the workpiece, and inaccurate pull-out force detection, and the ultra-high temperature single-wire mechanical loading platform are issues that technical personnel in this field urgently need to solve. Summary of the invention

[0009] In view of this, the purpose of the present invention is to provide an ultra-high temperature single-filament mechanical loading platform, which uses the thermal radiation generated by the heating body to heat the workpiece, thereby solving the problem of limitation on the material of the workpiece and the problem of uneven heating of the workpiece during testing. In addition, a thermal insulation module is added to facilitate the continued increase in the test temperature, and an ultra-high temperature environment of 2000°C can be achieved in a narrow space. At the same time, a horizontally arranged groove body in the heating body is used to support the workpiece, reducing the influence of the clamping tooling on the measurement of the workpiece pulling force, ensuring the test accuracy, and thereby promoting the improvement of the effectiveness of the test results.

[0010] Another object of the present invention is to provide a test device including the ultra-high temperature monofilament mechanical loading platform, including the ultra-high temperature monofilament mechanical loading platform, having the same technical features and being able to achieve the same effects;

[0011] Another object of the present invention is to provide a test method applied to the above test device, which can accurately measure the mechanical properties of the workpiece in a high temperature environment.

[0012] In order to achieve the above object, the present invention provides the following technical solutions:

[0013] An ultra-high temperature single-filament mechanical loading platform, comprising:

[0014] A tension loading module, comprising two sets of movable beams moving relative to or towards each other, a driving module driving the movable beams to move, and a monofilament clamp, wherein the movable beams are connected to the monofilament clamp via a sensor assembly;

[0015] The high-temperature loading module comprises a heating body and a heat preservation module for heat preservation of the heating body. The surface of the heating body is provided with a groove for holding workpieces. The center line of the groove is arranged horizontally and overlaps with the connection line of the two groups of monofilament clamps.

[0016] Preferably, the driving module includes at least two groups of parallel arranged screw assemblies, the rotating part of the screw assembly is connected to the motor power through a synchronous transmission mechanism, the sliding part of the screw assembly is fixedly connected to the moving beam, and the sliding part threads corresponding to the two groups of moving beams have opposite rotation directions.

[0017] Preferably, the tension loading module further comprises a base plate, the rotating portion of the lead screw assembly is mounted to rotate relative to the base plate, and a linear rail is provided in the base plate to guide the movement direction of the moving beam;

[0018] The high temperature loading module is fixedly connected to the base plate.

[0019] Preferably, the heat preservation module comprises a heat preservation body and a heat preservation board, the heating body is embedded in the heat preservation body, and the heat preservation board is used to cover the heating body;

[0020] The high temperature loading module is externally wrapped with a shielding cover.

[0021] Preferably, the monofilament clamp comprises a clamp body and a clamp pressure plate, the contact surfaces of the clamp body and the clamp pressure plate are provided with mutually meshing tooth patterns for increasing the friction between the workpiece, and the clamp body or the clamp pressure plate is connected and fixed to the sensor assembly via an insulating connector.

[0022] A vacuum testing device comprises any one of the ultra-high temperature single-filament mechanical loading platforms described above.

[0023] Preferably, it also includes an atmosphere environment box, and the ultra-high temperature monofilament mechanical loading platform is fixedly arranged in the atmosphere environment box;

[0024] The atmosphere environment box is connected to a vacuum module for internal vacuuming;

[0025] The surface of the heat preservation module is provided with an observation hole corresponding to the tank body, and the outer wall of the atmosphere environment box is provided with an observation window corresponding to the position of the observation hole;

[0026] An in-situ observation module is fixedly arranged outside the observation window.

[0027] Preferably, the in-situ observation module comprises a clamping plate and an infrared thermometer, the clamping plate is fixedly engaged with the observation window, and the infrared thermometer is fixedly connected to the clamping plate via a supporting assembly and a cross slide.

[0028] Preferably, a metal vacuum resistance gauge and a thermocouple temperature sensor are provided in the atmosphere environment box, the metal vacuum resistance gauge is used to detect the vacuum degree in the atmosphere environment box, and the thermocouple temperature sensor is used to detect the ambient temperature of key positions in the atmosphere environment box.

[0029] A test method, applied to any one of the vacuum test devices described above, comprising the following steps:

[0030] The two ends of the workpiece are fixedly connected to the monofilament clamp, and the workpiece is placed in the slot;

[0031] Controlling the vacuum pumping module to evacuate the atmosphere environment box to a set vacuum degree, then stopping the vacuum pumping, and maintaining the atmosphere environment box at the set vacuum degree;

[0032] After controlling the heating body to heat to a set temperature, the set temperature is maintained;

[0033] Controlling the driving module in the tension loading module to drive the two groups of movable beams to move toward each other until the workpiece breaks;

[0034] The sensor assembly is controlled to detect the force data of the workpiece.

[0035] Compared with the prior art, the ultra-high temperature monofilament mechanical loading platform provided by the present invention has at least the following beneficial effects:

[0036] 1. The workpiece is heated by the heat radiation generated by the heating body, thereby solving the limitation of the material of the workpiece, so that it can be measured without conducting electricity; at the same time, the problem of uneven heating caused by different heat dissipation performance of the workpiece at different positions due to clamping, or different heat generation due to drawing and diameter reduction is solved, thereby ensuring the accuracy of the workpiece performance test;

[0037] 2. Adding a heat preservation module outside the heating body can reduce the heat loss of the heating body, which helps to increase the test environment temperature, thereby measuring the mechanical properties of the workpiece at a higher temperature, ensuring the ultra-high temperature of 2000℃ in the sample area, and avoiding the impact of heat radiation on the life of the equipment loading and measuring unit;

[0038] 3. The workpiece is supported by a horizontally arranged trough, and combined with the heating method of the heating body, the problem of inaccurate force measurement caused by the need to clamp the power supply wire of the workpiece is effectively solved, and the mechanical measurement accuracy is effectively improved.

[0039] The test device provided by the present invention includes the above-mentioned ultra-high temperature single-filament mechanical loading platform and has the same beneficial effects.

[0040] The test method provided by the present invention, applied to the above-mentioned test device, can quickly and accurately evaluate the mechanical properties of the material in an ultra-high temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0042] Figure 1 This is a schematic structural diagram of a specific ultra-high temperature single-filament mechanical loading platform provided by the present invention;

[0043] Figure 2 A top view of a specific ultra-high temperature single-filament mechanical loading platform provided by the present invention;

[0044] Figure 3 A top view of a specific high-temperature loading module provided by the present invention;

[0045] Figure 4 A schematic diagram of the structure of a specific atmosphere environment box provided by the present invention;

[0046] Figure 5 A partial cross-sectional view of a specific atmosphere environment box provided by the present invention;

[0047] Figure 6 This is a schematic diagram of the structure of a specific in-situ observation module provided by the present invention;

[0048] Figure 7 A schematic diagram of the structure of a specific vacuum test device provided by the present invention;

[0049] Figure 8 A schematic diagram of a specific test method provided by the present invention;

[0050] Fig. 9 This is a schematic structural diagram of a specific auxiliary installation tool provided by the present invention.

[0051] Figure 1-Figure 9 middle:

[0052] 1. Tension loading module; 11. Bottom plate; 12. Screw assembly; 13. Moving beam; 14. Motor; 15. Synchronous transmission mechanism; 16. Tail stock; 17. Linear rail; 18. Single wire clamp; 19. Clamp pressure plate;

[0053] 2. High temperature loading module; 21. Shielding cover; 22. Bracket; 23. Insulation body; 24. Heating body; 25. Insulation board; 26. Observation hole;

[0054] 3. Sensor assembly;

[0055] 4. Atmosphere environment box; 41. Water cooling joint; 42. Electrode assembly; 43. Aviation plug assembly; 44. Metal vacuum resistance gauge; 45. Vacuum clamp; 46. Observation window; 47. Thermocouple temperature sensor;

[0056] 5. In-situ observation module; 51. Clamp; 52. Cross slide; 53. Cushion block; 54. Connecting plate; 55. Infrared thermometer;

[0057] 6. Vacuum pump module; 61. Mechanical pump; 62. Molecular pump;

[0058] 7. Electrical and water cooling control module; 71. Control module; 72. Power module; 73. Water cooling module;

[0059] 8. Positioning block; 9. Connecting handle. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] The core of the present invention is to provide an ultra-high temperature single-filament mechanical loading platform, which uses the heat radiation generated by the heating body to heat the workpiece, thereby solving the problem of limitation on the material of the workpiece and the problem of uneven heating of the workpiece during the test. In addition, a heat preservation module is added to facilitate the continued increase in the test temperature, and an ultra-high temperature environment of 2000°C can be achieved in a small space. At the same time, a horizontally arranged groove body in the heating body is used to support the workpiece, reducing the influence of the clamping tooling on the measurement of the workpiece pulling force, ensuring the test accuracy, and thereby promoting the improvement of the effectiveness of the test results.

[0062] Another core of the present invention is to provide a test device including the above-mentioned ultra-high temperature single-filament mechanical loading platform, including the above-mentioned ultra-high temperature single-filament mechanical loading platform, having the same technical features and being able to achieve the same effects.

[0063] Another core of the present invention is to provide a test method applied to the above test device, which can accurately measure the mechanical properties of the workpiece in a high temperature environment.

[0064] Please refer to Figure 1-Figure 3 , an ultra-high temperature single-filament mechanical loading platform, comprising:

[0065] The tension loading module 1 includes two sets of movable beams 13 that move relative to or toward each other, a driving module that drives the movable beams 13 to move, and a monofilament clamp 18. The movable beam 13 is connected to the monofilament clamp 18 through a sensor assembly 3.

[0066] The high temperature loading module 2 includes a heating body 24 and a heat preservation module for heat preservation of the heating body 24. The surface of the heating body 24 is provided with a groove for holding the workpiece. The center line of the groove is arranged horizontally and overlaps with the connection line of the two groups of monofilament clamps 18.

[0067] like Figure 3 As shown, the heating body 24 is used to heat the workpiece by heat radiation, so that the workpiece is heated from the outside, ensuring that it is heated evenly, and there will be no uneven heating due to different heat dissipation conditions or force changes of the workpiece, thereby ensuring that the workpiece is heated evenly throughout the mechanical test process, and the mechanical test results are true and accurate;

[0068] At the same time, the workpiece is heated by thermal radiation to solve the heating problem of insulating materials, so that the test workpiece is not limited by the conductive properties of the material, and is suitable for testing workpieces of more materials;

[0069] Moreover, by adding a heat preservation module outside the heating body 24, the heat loss of the heating body 24 is reduced, so that the heat generated by the heating body 24 acts more on the workpiece, thereby increasing the test temperature of the workpiece, and then the mechanical properties of the workpiece at a higher temperature can be measured, such as measuring the mechanical properties of the workpiece under a 3000°C environment;

[0070] In addition, the horizontally arranged groove in the heating body 24 supports the workpiece, reducing the influence of the workpiece fixture's own gravity on the pull-out force test of the workpiece, thereby ensuring the accuracy of the test results;

[0071] like Figure 1 and Figure 2 As shown, the tension loading module 1 adopts two groups of movable beams 13 that move relative to or toward each other to apply forces to both ends of the workpiece at the same time, so that the workpiece can be deformed evenly during the test process, that is, the center position remains unchanged, which is convenient for in-situ test measurement. Compared with the traditional unilateral force on the workpiece, the center of the workpiece is shifted, and the measuring point of the workpiece is changed, resulting in changes in the temperature monitoring point of the workpiece, affecting the accuracy of the test temperature detection, and thus affecting the validity of the test results.

[0072] In some embodiments, the driving module includes at least two sets of parallel arranged screw assemblies 12, the rotating part of the screw assembly 12 is connected to the motor 14 through a synchronous transmission mechanism 15, the sliding part of the screw assembly 12 is fixedly connected to the moving beam 13, and the sliding part threads corresponding to the two sets of moving beams 13 have opposite rotation directions;

[0073] like Figure 1 and Figure 2 As shown, the rotating parts of the two groups of screw assemblies 12 are synchronously driven to rotate by the motor 14 to ensure that their rotation speeds are equal. At the same time, the two groups of screw assemblies 12 are used to drive the moving beam 13 to move to ensure the smoothness of its movement. Moreover, the two groups of moving beams 13 are combined with the screw assemblies 12 through opposite spiral rotation directions, so that the two groups of moving beams 13 can move synchronously in opposite directions, ensuring that forces can be applied to both ends of the workpiece at the same time, and then ensuring that the center point of the workpiece does not move when the workpiece is deformed by force, thereby facilitating the realization of in-situ test measurement and ensuring the accuracy of the test results.

[0074] In some embodiments, the tension loading module 1 further includes a base plate 11, the rotating portion of the lead screw assembly 12 is rotatably mounted relative to the base plate 11, and a linear rail 17 is provided in the base plate 11 to guide the movement direction of the moving beam 13;

[0075] The high temperature loading module 2 is fixedly connected to the base plate 11;

[0076] like Figure 1 and Figure 2 As shown, a crossbeam and a tailstock 16 are respectively arranged at both ends of the base plate 11, and both ends of the rotating part of the screw assembly 12 are rotatably mounted on the crossbeam and the tailstock 16, respectively, and the motor 14 is fixedly connected to the crossbeam, and a cover for protecting the synchronous transmission mechanism 15 is arranged at the crossbeam to increase its protection performance;

[0077] At the same time, a linear rail 17 is arranged on the bottom plate 11, so that the moving beam 13 and the linear rail 17 are slidably installed to guide the moving beam 13 to slide smoothly;

[0078] At the same time, the high temperature loading module 2 is fixedly connected to the bottom plate 11 to ensure that the heating body 24 and the heat preservation module will not be displaced due to force during the test.

[0079] In some embodiments, the heat preservation module includes a heat preservation body 23 and a heat preservation board 25, the heating body 24 is embedded in the heat preservation body 23, and the heat preservation board 25 is used to cover the heating body 24;

[0080] The high temperature loading module 2 is externally wrapped with a shielding cover 21;

[0081] like Figure 2 and Figure 3 As shown, the heat preservation module adopts the form of a combination of a heat preservation body 23 and a heat preservation board 25. The heat preservation body 23 half-wraps the heating body 24, leaking out of the trough body, which is convenient for the arrangement of the workpiece, wherein the trough body also half-wraps the workpiece, which is conducive to its uniform heating, and then the heat preservation board 25 is used to cover the heating body 24, so as to achieve full coverage of the heating body 24 and the workpiece, thereby reducing the heat loss of the heating body 24 and the workpiece, so that the workpiece can reach a higher test temperature;

[0082] At the same time, a shielding cover 21 is wrapped around the outside of the high-temperature loading module 2, and the high-temperature loading module 2 is fixed in the shielding cover 21 through a bracket 22, so as to further isolate the heat radiation from propagating outward, reduce the heat loss of the heating body 24, and avoid the influence of high temperature on other components.

[0083] In some embodiments, the monofilament clamp 18 includes a clamp body and a clamp pressure plate 19, and the contact surfaces of the clamp body and the clamp pressure plate 19 are provided with mutually meshing tooth patterns to increase the friction between the workpiece and the clamp body or the clamp pressure plate 19 is connected and fixed to the sensor assembly 3 through an insulating connector;

[0084] like Figure 2 and Figure 3As shown, the monofilament clamp 18 includes a clamp plate 19 and a clamp body, and mutually meshing tooth patterns are provided between the contact surfaces of the clamp plate 19 and the clamp body, so that the workpiece is clamped between the clamp body and the clamp plate 19. The workpiece interacts with the tooth patterns to increase the contact area, thereby increasing the friction force. In order to avoid wear of the workpiece during the clamping process, a kraft paper pad can be added between the clamp body and the clamp plate 19 to isolate the workpiece and avoid direct contact and wear between the workpiece and the clamp body or the clamp plate 19.

[0085] At the same time, the fixture body is connected to the sensor assembly 3 through a combination of insulating screws and insulating nuts. When the movable crossbeam 13 moves, the single-wire fixture 18 is driven to move through the sensor assembly 3. During the process, an insulator is used to connect the single-wire fixture 18 and the sensor assembly 3, which effectively avoids the current caused by the conduction of the workpiece from being transmitted from the heating module to the sensor assembly 3, thereby avoiding the other parts in the equipment from being energized and ensuring the safety of the test operation.

[0086] At the same time Figure 3 As shown, heat dissipation structures are provided on both sides of the single-wire clamp 18 to dissipate heat from the single-wire clamp 18, thereby avoiding the problem of decreased clamping force due to high temperature of the single-wire clamp 18, which in turn causes decreased accuracy of the test results;

[0087] Specifically, comb-tooth-shaped heat dissipation structures are provided on both sides of the clamp body so that the heat transferred from the workpiece to the single-wire clamp 18 can be quickly dissipated.

[0088] In practical applications, because the workpiece is a single wire with a small diameter, there is a problem of low test success rate due to incorrect clamping. Therefore, additional auxiliary installation tooling is required during actual clamping;

[0089] like Fig. 9 As shown, the auxiliary installation tooling includes a positioning block 8 and a connecting handle 9. In the preparation stage, the connecting blocks in the two groups of monofilament clamps 18 are first fixedly installed in the corresponding positions in the positioning block 8, so that the spacing between the two groups of connecting blocks matches the length of the workpiece, and then the clamp body is fixed to the connecting block, the clamp pressure plate 19 is fixed to the clamp body, and the workpiece is clamped between the clamp pressure plate 19 and the clamp body, and the monofilament workpiece is fixed by laying kraft paper between the clamp pressure plate 19 and the clamp body, and then, the clamp pressure plates 19 at both ends are connected and fixed by using the connecting handle 9;

[0090] After the preparation is completed, the workpiece is transferred, the connection between the connecting block and the positioning block 8 is removed, the connecting handle 9 is taken, and the workpiece and the single-wire clamp 18 are transferred to the work station together. After the workpiece is placed in the groove on the surface of the heating body 24, the sensor assembly 3 and the connecting block are connected, and then the connecting handle 9 is removed, and the insulation board 25 is covered to complete the clamping of the entire workpiece.

[0091] It is worth noting that the clamp body and the clamp pressure plate 19 are preferably flexible buffer-type pads, which can avoid clamping failure and improve the success rate of the test; and in the preparation process, by adding a positioning block 8, the single-wire clamp 18 can be positioned, limited and supported for the single-wire workpiece, ensuring that the spacing between the two ends of the single-wire workpiece is accurate, thereby improving the success rate of the test.

[0092] In addition to the ultra-high temperature single-filament mechanical loading platform disclosed in the above-mentioned embodiments, the present invention also provides a vacuum testing device including the ultra-high temperature single-filament mechanical loading platform.

[0093] In some embodiments, Figure 4-Figure 7 As shown, the vacuum test device also includes an atmosphere environment box 4, and the ultra-high temperature single-filament mechanical loading platform is fixedly arranged in the atmosphere environment box 4;

[0094] The atmosphere environment box 4 is connected to a vacuum module 6 for internal vacuuming;

[0095] The surface of the heat preservation module is provided with an observation hole 26 corresponding to the tank body, and the outer wall of the atmosphere environment box 4 is provided with an observation window 46 corresponding to the position of the observation hole 26;

[0096] An in-situ observation module 5 is fixedly arranged outside the observation window 46;

[0097] like Figure 4 and Figure 5 As shown, the ultra-high temperature single-filament mechanical loading platform is arranged in the atmosphere environment box 4, which can simulate the high temperature mechanical properties of the workpiece under different environments, such as evacuating the atmosphere environment box 4 to achieve mechanical property testing of the workpiece under vacuum and high temperature environment;

[0098] At the same time, the vacuum module 6 of the atmosphere environment box 4 includes a mechanical pump 61 and a molecular pump 62, both of which are connected to the atmosphere environment box 4 through an air duct. By selectively starting the mechanical pump 61 or the molecular pump 62, the atmosphere environment box 4 can reach different degrees of vacuum state, wherein the mechanical pump 61 can achieve high vacuum environment requirements, and the molecular pump 62 can meet the low vacuum environment conditions of the test;

[0099] In addition, if Figure 7As shown, the vacuum test device also includes an electrical and water-cooling control module 7, which includes a control module 71, a power module 72, and a water-cooling module 73, which are respectively connected to the aviation plug assembly 43, the electrode assembly 42 and the water-cooling joint 41 of the atmosphere environment box 4 to perform signal transmission, power transmission and circulating water heat dissipation; wherein the control module 71 is used to complete the control and data reception analysis of the tension loading module 1, the vacuum pumping module 6, the high-temperature loading module 2, the sensor assembly 3, and the in-situ observation module 5, the power module 72 provides a stable voltage input for the above modules, and the water-cooling module 73 provides heat dissipation capacity for the other modules in the above modules except the high-temperature loading module 2, so that they can maintain a suitable working temperature during work and thus work stably. The above working methods are all prior art and will not be repeated here;

[0100] At the same time, when designing the high-temperature loading module 2, an observation hole 26 is set at the position corresponding to the center of the heat preservation module and the workpiece, and an observation window 46 is set on the surface of the atmosphere environment box 4 at the position corresponding to the observation hole 26, combined with the force applied at both ends of the tension loading module 1, so that the center point position of the workpiece does not change during deformation, and then the in-situ observation module 5 can perform in-situ observation of the center point of the workpiece through the observation window 46 and the observation hole 26;

[0101] The observation hole 26 is opened on the insulation board 25, which is used to expose the heating body 24 at the corresponding position and the workpiece in the groove at the corresponding position, so that the detection object of the in-situ observation module 5 is changed to the heating body 24 and the workpiece at the corresponding position of the observation hole 26, thereby increasing the area of ​​the observed position, thereby reducing the problem of large deviation between the observed temperature and the actual temperature caused by the change of the observation point, which helps to reduce the error of the actual temperature measurement value of the workpiece.

[0102] In some embodiments, the in-situ observation module 5 includes a clamping plate 51 and an infrared thermometer 55, the clamping plate 51 is fixedly connected to the observation window 46, and the infrared thermometer 55 is fixedly connected to the clamping plate 51 through a support assembly and a cross slide 52;

[0103] like Figure 6 As shown, the clamping plate 51 is an annular structure, which is clamped on the outside of the observation window 46, so that the in-situ observation module 5 is fixedly connected to the atmosphere environment box 4, and a cross slide 52 is arranged on the clamping plate 51, so that the infrared thermometer 55 installed thereon can be adjusted in the horizontal plane, and then the measuring area of ​​the infrared thermometer 55 is adjusted, so as to facilitate the temperature measurement of the workpiece in the observation hole 26. At the same time, by adding a supporting component including a cushion block 53 and a connecting plate 54, the infrared thermometer 55 can maintain a reasonable distance from the observation window 46 to avoid mutual interference.

[0104] In some embodiments, a metal vacuum resistor gauge 44 and a thermocouple temperature sensor 47 are provided in the atmosphere environment box 4. The metal vacuum resistor gauge 44 is used to detect the vacuum degree in the atmosphere environment box 4, and the thermocouple temperature sensor 47 is used to detect the ambient temperature in the atmosphere environment box 4.

[0105] like Figure 4 and Figure 5 As shown, a metal vacuum resistor gauge 44 is added at the interface of the atmosphere environment box 4 through a vacuum clamp 45 to ensure the sealing of the connection. At the same time, the vacuum degree in the atmosphere environment box 4 is directly obtained by using the metal vacuum resistor gauge 44, and combined with the output of the vacuum pumping module 6, a closed-loop control is realized;

[0106] At the same time, a plug hole is set on the side of the atmosphere environment box 4, and a thermocouple temperature sensor 47 is inserted to detect the ambient temperature in the atmosphere environment box 4, which is combined with the output of the water cooling module 73 to achieve closed-loop control.

[0107] In addition to the ultra-high temperature monofilament mechanical loading platform and vacuum testing device disclosed in the above embodiments, the present invention also provides a testing method applied to the above vacuum testing device, comprising the following steps:

[0108] The two ends of the workpiece are fixedly connected to the monofilament clamp 18, and the workpiece is placed in the tank;

[0109] Control the vacuum pumping module 6 to evacuate the atmosphere environment box 4 to a set vacuum degree, then stop evacuating the atmosphere environment box 4 and keep the atmosphere environment box 4 at the set vacuum degree;

[0110] After controlling the heating body 24 to heat to a set temperature, the set temperature is maintained;

[0111] Controlling the driving module in the tension loading module 1 to drive the two groups of moving beams 13 to move toward each other until the workpiece breaks;

[0112] The sensor assembly 3 is controlled to detect the force data of the workpiece.

[0113] like Figure 8 As shown, after the workpiece is fixed by the single-wire clamps 18 at both ends, it is in a straightened state and placed in the slot body, and then the insulation board 25 is installed to cover it to complete the clamping of the workpiece; then the ultra-high temperature single-wire mechanical loading platform is placed in the atmosphere environment box 4 as a whole, and then the atmosphere environment box 4 is evacuated, and the heating body 24 is started to do work and heat. After reaching the set temperature, the tension loading module 1 is controlled to do work to detect the mechanical properties of the workpiece.

[0114] Through this test method, the mechanical properties of a single-wire workpiece with a diameter of 0.01 mm at 3000°C can be quickly completed, and the test results are accurate and effective.

[0115] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0116] The ultra-high temperature monofilament mechanical loading platform, vacuum testing device and testing method provided by the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An ultra-high temperature monofilament mechanical loading platform, characterized in that: include: A tension loading module (1) comprises two groups of movable beams (13) that move relative to or towards each other, a driving module that drives the movable beams (13) to move, and a single-wire clamp (18), wherein the movable beams (13) are connected to the single-wire clamp (18) via a sensor assembly (3); A high-temperature loading module (2) comprises a heating body (24) and a heat preservation module for heat preservation of the heating body (24); a groove for holding workpieces is provided on the surface of the heating body (24); a center line of the groove is arranged horizontally and overlaps with a connection line of two groups of monofilament clamps (18).

2. The ultra-high temperature single-filament mechanical loading platform according to claim 1, characterized in that: The drive module comprises at least two groups of parallel arranged lead screw assemblies (12), the rotating part of the lead screw assembly (12) being connected to the power of the motor (14) via a synchronous transmission mechanism (15), the sliding part of the lead screw assembly (12) being fixedly connected to the moving crossbeam (13), and the thread rotation directions of the sliding parts corresponding to the two groups of moving crossbeams (13) are opposite.

3. The ultra-high temperature monofilament mechanical loading platform according to claim 2, characterized in that: The tension loading module (1) further comprises a base plate (11), the rotating portion of the lead screw assembly (12) being mounted to rotate relative to the base plate (11), and a linear rail (17) for guiding the movement direction of the moving beam (13) is provided in the base plate (11); The high temperature loading module (2) is fixedly connected to the base plate (11).

4. The ultra-high temperature single-filament mechanical loading platform according to claim 1, characterized in that: The heat-insulating module comprises a heat-insulating body (23) and a heat-insulating plate (25); the heating body (24) is embedded in the heat-insulating body (23); and the heat-insulating plate (25) is used to cover the heating body (24); The high-temperature loading module (2) is externally wrapped with a shielding cover (21).

5. The ultra-high temperature single-filament mechanical loading platform according to claim 1, characterized in that: The monofilament clamp (18) comprises a clamp body and a clamp pressure plate (19); contact surfaces of the clamp body and the clamp pressure plate (19) are provided with mutually meshing tooth-shaped patterns for increasing friction with a workpiece; the clamp body or the clamp pressure plate (19) is connected and fixed to the sensor assembly (3) via an insulating connector.

6. A vacuum testing device, characterized in that: It comprises the ultra-high temperature single-filament mechanical loading platform as described in any one of claims 1-5.

7. The vacuum testing device according to claim 6, characterized in that: It also includes an atmosphere environment box (4), wherein the ultra-high temperature single-filament mechanical loading platform is fixedly arranged in the atmosphere environment box (4); The atmosphere environment box (4) is connected to a vacuum module (6) for internal vacuuming; An observation hole (26) corresponding to the tank body is provided on the surface of the heat preservation module, and an observation window (46) corresponding to the position of the observation hole (26) is provided on the outer wall of the atmosphere environment box (4); An in-situ observation module (5) is fixedly arranged outside the observation window (46).

8. The vacuum testing device according to claim 7, characterized in that: The in-situ observation module (5) comprises a clamping plate (51) and an infrared thermometer (55); the clamping plate (51) is fixedly engaged with the observation window (46); and the infrared thermometer (55) is fixedly connected to the clamping plate (51) via a support assembly and a cross slide (52).

9. The vacuum testing device according to claim 7, characterized in that: A metal vacuum resistance gauge (44) and a thermocouple temperature sensor (47) are arranged in the atmosphere environment box (4); the metal vacuum resistance gauge (44) is used to detect the vacuum degree in the atmosphere environment box (4); and the thermocouple temperature sensor (47) is used to detect the ambient temperature in the atmosphere environment box (4).

10. A test method, characterized in that: Applicable to the vacuum testing device according to any one of claims 7 to 9, the testing method comprises the following steps: Fixedly connecting two ends of a workpiece to the monofilament clamp (18), and placing the workpiece in the slot; Controlling the vacuum pumping module (6) to evacuate the atmosphere environment box (4) to a set vacuum degree, then stopping the vacuum pumping, and maintaining the atmosphere environment box (4) at the set vacuum degree; After controlling the heating body (24) to heat to a set temperature, the set temperature is maintained; Controlling the driving module in the tension loading module (1) to drive the two groups of movable beams (13) to move towards each other until the workpiece breaks; The control sensor assembly (3) detects the force data of the workpiece.

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