Wide-temperature-range dynamic variable-frequency pressure-coupled high-pressure torsion processing equipment

Abstract

The present application relates to the technical field of plastic working of metal materials, in particular to a wide-temperature-range dynamic variable-frequency pressure-coupled high-pressure torsion processing equipment, which comprises a support seat and further comprises: a bearing mechanism installed on the support seat; an environment mechanism installed on the bearing mechanism; a torsion mechanism installed on the support seat and used for adjusting the torsion torque; the environment mechanism comprises a double-layer furnace shell, a heating assembly, a refrigeration assembly and a circulating assembly; the double-layer furnace shell is installed on the torsion mechanism, the heating assembly is located outside the support seat and is used for heating a mold in the bearing mechanism; the pressure of the present application can be adapted in real time according to the plasticity change of the material at different temperatures, the problems of stress concentration and insufficient deformation are avoided, the material grain is refined to submicron or even nanometer level, and the distribution of defects such as dislocation and stacking fault is more reasonable; the yield strength and fatigue resistance of the material are improved, the plasticity is maintained well, and the comprehensive mechanical properties are significantly optimized.

Description

Technical Field

[0001] This invention relates to the field of metal material plastic processing technology, specifically to a wide-temperature-range dynamic frequency conversion pressure coupling high-pressure torsion processing equipment. Background Technology

[0002] Grain refinement and micro-defect control of metallic materials are the core approaches to improving their mechanical properties. High-pressure torsion, as a typical large plastic deformation technology, can refine material grains to submicron or even nanoscale through the combined action of axial high pressure and tangential shear. At the same time, it introduces defects such as high-density dislocations and stacking faults, which significantly improves the strength, toughness and fatigue resistance of the material. It is widely applicable to the demand for high-performance metallic materials in aerospace, medical devices, energy and chemical industries, such as the strengthening treatment of key structural materials such as titanium alloys, nickel-based superalloys and magnesium alloys.

[0003] Existing high-pressure torsion equipment still has shortcomings in terms of temperature coverage and pressure control: In terms of temperature, the operating temperature of most equipment is limited to the range of room temperature to 400℃. For example, the electric field-assisted high-pressure torsion testing machine disclosed in Chinese patent CN107764664A can reach a maximum temperature of 800℃, but the lower limit of the temperature is only room temperature, which cannot meet the low-temperature processing requirements of the liquid nitrogen temperature range (-196℃); the high-temperature high-pressure torsion equipment disclosed in Chinese patent CN222994207U also only focuses on high-temperature working conditions and lacks extreme low-temperature adaptation design; In terms of pressure control, existing equipment generally adopts a constant pressure output mode. For example, the pressure control of the multi-functional high-pressure torsion forming machine disclosed in Chinese patent CN108526282A is a fixed gear, and the pressure output of the high-pressure torsion equipment disclosed in Chinese patent CN111346956A is a constant value. Neither can be dynamically and continuously adjusted according to the real-time plasticity of the material at different temperatures, resulting in easy cracking during high-temperature processing and insufficient deformation during low-temperature processing.

[0004] In summary, existing technologies lack solutions that can cover a wide temperature range from -196℃ to 600℃ and have dynamic frequency conversion pressure control capabilities, which limits the application of high-pressure torsion processes under extreme conditions. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a wide-temperature-range dynamic frequency conversion pressure coupling high-pressure torsion processing equipment.

[0006] The technical solution of this invention: A wide-temperature-range dynamic frequency conversion pressure coupling high-pressure torsion processing equipment, including a support base, and further including: a bearing mechanism mounted on the support base; an environmental mechanism mounted on the bearing mechanism; a torsion mechanism mounted on the support base and used to adjust the torsional torque; the environmental mechanism includes a double-layer furnace shell, a heating component, a cooling component, and a circulation component; the double-layer furnace shell is mounted on the torsion mechanism, the heating component is located outside the support base and is used to heat the mold inside the bearing mechanism; the cooling component is mounted on the double-layer furnace shell and is used for temperature detection and cooling; the circulation component is mounted on the double-layer furnace shell and is used for circulating cooling; the heating component heats the mold, and the cooling component lowers the temperature.

[0007] Preferably, the heating assembly includes a slide rail bracket, a pure copper electrode, an induction heating coil, an insulation ring, a first driving device, and a second driving device. The slide rail bracket is located outside the support base, and the first driving device is mounted on the slide rail bracket. The second driving device is mounted on the moving end of the first driving device. The pure copper electrode is mounted on the driving end of the second driving device and is connected to the induction heating coil. The induction heating coil moves to the outer periphery of the mold inside the double-layer furnace shell to heat the mold.

[0008] Preferably, the refrigeration assembly includes a thermocouple temperature measuring element, a composite resistance vacuum gauge molecular pump, and a cryogenic medium container; the thermocouple temperature measuring element is installed outside the double-layer furnace shell and is used for temperature acquisition; the composite resistance vacuum gauge molecular pump is installed outside the double-layer furnace shell and is used for vacuuming inside the double-layer furnace shell; the cryogenic medium container is placed inside the double-layer furnace shell and is used for temperature reduction.

[0009] Preferably, the circulation assembly includes a water cooling system, a furnace shell water inlet, a furnace shell water outlet, a pressure head water outlet, and a pressure head water inlet; the water cooling system is located outside the support base; the furnace shell water inlet connects to the bottom of the double-layer furnace shell, and the furnace shell water outlet connects to the top of the double-layer furnace shell; cooling water enters the double-layer furnace shell from the furnace shell water inlet and then exits from the furnace shell water outlet; the pressure head water inlet is installed at the top of the upper pressure head, and the pressure head water outlet is installed inside the upper pressure head and connected to the pressure head water inlet through the upper pressure head.

[0010] Preferably, the supporting mechanism includes an upper crossbeam panel, a column, a front furnace door, a furnace frame, and a rear furnace door; the column is installed on the top of the support base; the upper crossbeam panel is fitted onto the column; both the front and rear furnace doors are installed on the double-layer furnace shell, and the heating components enter the double-layer furnace shell through the rear furnace door; the furnace frame is installed on the column, and the double-layer furnace shell is supported on the furnace frame.

[0011] Preferably, the torsion mechanism includes a four-column hydraulic press, an upper pressure head, a lower pressure head, a lower crossbeam panel, a rotary reducer, and an actuator; the rotary reducer is installed inside the support base; the four-column hydraulic press is installed on the columns; the upper pressure head is installed on the upper crossbeam panel; the lower pressure head is installed on the lower crossbeam panel; the lower crossbeam panel is installed on the support base and sleeved with the rotary reducer; the actuator is installed inside the double-layer furnace shell; the output shaft of the rotary reducer passes through the lower crossbeam panel and is connected to the lower pressure head.

[0012] Preferably, the execution components include an upper anvil, a lower anvil, an upper mold, and a lower mold; the upper anvil is mounted on the upper pressure head, a pressure sensor is mounted on the upper anvil, and it moves up and down with the upper pressure head; the lower anvil is mounted on the lower pressure head and rotates with the lower pressure head; an insulation ring is placed on the lower anvil; the lower mold is fitted inside the lower anvil; and the upper mold is placed on the upper mold.

[0013] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects: The cryogenic medium container provides liquid nitrogen circulation cooling and electric heating through a heating module consisting of pure copper electrodes, induction heating coils, and insulation rings, enabling the equipment to cover a wide temperature range. It can achieve low-temperature toughness control and defect freezing of materials at liquid nitrogen temperatures, and also meet the large plastic deformation requirements of medium and high temperature alloys. It breaks through the temperature adaptability limitations of traditional equipment, and a single device can complete material strengthening treatment under different temperature conditions.

[0014] This invention uses a four-column hydraulic press to drive an upper pressure head to apply downward pressure. A proportional control valve and pressure sensor are used to dynamically adjust the axial pressure via frequency conversion. Simultaneously, a rotary reducer drives a lower rotary reducer and a lower die to perform torsional motion relative to the upper anvil and upper die. The pressure can be adjusted in real time according to the plasticity changes of the material at different temperatures, avoiding stress concentration and insufficient deformation. This refines the material grains to submicron or even nanometer scale, resulting in a more rational distribution of defects such as dislocations and stacking faults. The invention improves the material's yield strength and fatigue resistance while maintaining good plasticity, significantly optimizing overall mechanical properties.

[0015] This invention utilizes the coordinated control of the main control cabinet and power supply cabinet, integrating a composite resistance vacuum gauge molecular pump to provide a vacuum environment. Cooling water circulates through a water-cooling system, furnace shell inlet, and furnace shell outlet to cool the double-layer furnace shell. Cooling water then circulates through the pressure head inlet and outlet to cool the upper and lower pressure heads, ensuring that the surface temperature of the double-layer furnace shell does not become excessive and that the pressure heads do not fail during hot processing. It eliminates the need for a combined "high-pressure torsion + subsequent heat treatment" process, achieving coordinated temperature-pressure-torsion control within a single device. This simplifies process steps, significantly reduces maintenance costs, and makes it suitable for large-scale industrial applications. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the double-layer furnace shell proposed in this invention; Figure 3 This is a schematic diagram of the structure of the cryogenic medium container proposed in this invention; Figure 4 This is a schematic diagram of the upper pressure head proposed in this invention; Figure 5 This is a schematic diagram of the structure of the drive device proposed in this invention; Figure 6 This is a schematic diagram of the lower anvil structure proposed in this invention; Attached reference numerals: 1. Main control cabinet; 2. Power supply cabinet; 3. Four-column hydraulic press; 4. Upper crossbeam panel; 5. Upper pressure head; 6. Column; 7. Double-layer furnace shell; 8. Front furnace door; 9. Furnace frame; 10. Lower pressure head; 11. Lower crossbeam panel; 12. Rotary reducer; 13. Water cooling system; 14. Slide rail bracket; 15. Rear furnace door; 16. Thermocouple temperature measuring element; 17. Composite resistance vacuum gauge molecular pump; 18. Pure copper electrode; 19. Induction heating coil; 20. Insulation ring; 21. Upper anvil; 22. Lower anvil; 23. Upper mold; 24. Lower mold; 25. Low-temperature medium container; 26. Furnace shell water inlet; 27. Furnace shell water outlet; 28. Pressure head water outlet; 29. ​​Pressure head water inlet; 30. Drive device one; 31. Drive device two; 32. Support base. Detailed Implementation

[0017] Example 1, as Figures 1-6 As shown, the present invention proposes a wide-temperature-range dynamic frequency conversion pressure coupling high-pressure torsion processing equipment, including a support base 32, and further including: a bearing mechanism mounted on the support base 32; an environmental mechanism mounted on the bearing mechanism; a torsion mechanism mounted on the support base 32 and used to adjust the torsional torque; the environmental mechanism includes a double-layer furnace shell 7, a heating component, a cooling component, and a circulation component; the double-layer furnace shell 7 is mounted on the torsion mechanism, the heating component is located outside the support base 32 and is used to heat the mold inside the bearing mechanism; the cooling component is mounted on the double-layer furnace shell 7 and is used for temperature detection and cooling; the circulation component is mounted on the double-layer furnace shell 7 and is used for circulating cooling; the heating component heats the mold, and the cooling component lowers the temperature.

[0018] The heating assembly includes a slide rail bracket 14, a pure copper electrode 18, an induction heating coil 19, a heat preservation ring 20, a drive device 1 30, and a drive device 2 31. The slide rail bracket 14 is located outside the support base 32, and the drive device 1 30 is mounted on the slide rail bracket 14. The drive device 2 31 is mounted on the moving end of the drive device 1 30. The pure copper electrode 18 is mounted on the driving end of the drive device 2 31 and is connected to the induction heating coil 19. The induction heating coil 19 moves to the outer periphery of the mold inside the double-layer furnace shell 7 to heat the mold. Both the drive device 1 30 and the drive device 2 31 can be cylinders. When heating is required, the slide rail bracket 14 is moved to the vicinity of the support base 32, and the drive device 2 31 is aligned with the rear furnace door 15. The rear furnace door 15 on the double-layer furnace shell 7 is removed, and then the drive device 1 30 is started to drive the rear furnace door on the drive device 2 31. Door 15 moves to the rear furnace door 15 on the double-layer furnace shell 7. At this time, the induction heating coil 19 moves between the upper anvil 21 and the lower anvil 22, and the center of the induction heating coil 19, the insulation ring 20 and the upper anvil 21 are located on the same vertical axis. Then, the upper mold 23 and the lower mold 24 are placed on the lower anvil 22, and the insulation ring 20 is fitted around the outer periphery of the upper mold 23 and the lower mold 24. The position of the induction heating coil 19 is finely adjusted by the drive device 2 31. Then, the induction heating coil 19 rapidly heats the upper mold 23 and the lower mold 24. The total power during heating is ≤10kW. The temperature measuring end of the thermocouple measuring element 16 is moved to the insulation ring 20 and inserted into the through hole of the insulation ring 20 to detect the temperature near the upper mold 23 and the lower mold 24. The temperature measuring range is -200℃ to 650℃, and the temperature control accuracy is ±1℃.

[0019] The refrigeration system includes a thermocouple temperature sensor 16, a composite resistance vacuum gauge molecular pump 17, and a cryogenic medium container 25. The thermocouple temperature sensor 16 is installed outside the double-layer furnace shell 7 and is used for temperature acquisition. The composite resistance vacuum gauge molecular pump 17 is installed outside the double-layer furnace shell 7 and is used to create a vacuum inside the double-layer furnace shell 7. The cryogenic medium container 25 is placed inside the double-layer furnace shell 7 and is used for temperature reduction. During refrigeration, the cryogenic medium container 25 is placed inside the double-layer furnace shell 7. The cryogenic medium container 25 is equipped with pipes, and liquid nitrogen flows through the pipes inside the cryogenic medium container 25 to form a circulating refrigeration loop, which can achieve a stable temperature as low as -196℃. The cooling rate can be adjusted within the range of 5~20℃ / min. The molecular pump 17 and the double-layer furnace shell 7 are connected by a bellows and are isolated by a high-vacuum baffle valve. A composite vacuum gauge is also installed on the double-layer furnace shell 7. The composite vacuum gauge consists of an ionization vacuum gauge tube and a resistance vacuum silicon, and the measurement range is 1.0×10-5Pa~1.0×105Pa. The ZDF-Ⅲ series resistance / ionization composite vacuum gauge is based on the combination of the low-vacuum measurement resistance unit ZJ-52T resistance gauge and the high-vacuum measurement ionization unit ZJ-27 ionization gauge technology to complete the continuous measurement and control of gas pressure.

[0020] The circulation assembly includes a water cooling system 13, a furnace shell water inlet 26, a furnace shell water outlet 27, a pressure head water outlet 28, and a pressure head water inlet 29. The water cooling system 13 is located outside the support base 32. The furnace shell water inlet 26 is connected to the bottom end of the double-layer furnace shell 7, and the furnace shell water outlet 27 is connected to the top of the double-layer furnace shell 7. Cooling water enters the double-layer furnace shell 7 from the furnace shell water inlet 26 and then exits from the furnace shell water outlet 27. The pressure head water inlet 29 is installed at the top of the upper pressure head 5, and the pressure head water outlet 28 is installed inside the upper pressure head 5 and is connected to the pressure head water inlet 29 through the upper pressure head 5.

[0021] The supporting structure includes an upper crossbeam panel 4, a column 6, a front furnace door 8, a furnace frame 9, and a rear furnace door 15; the column 6 is installed on the top of the support base 32; the upper crossbeam panel 4 is fitted onto the column 6; both the front furnace door 8 and the rear furnace door 15 are installed on the double-layer furnace shell 7, and the heating components enter the double-layer furnace shell 7 through the rear furnace door 15; the furnace frame 9 is installed on the column 6, and the double-layer furnace shell 7 is supported on the furnace frame 9; the front furnace door 8 is connected to the double-layer furnace shell 7 by a hinge, adopts a manual front opening method, and is equipped with a manual locking device; the front furnace door 8 is also equipped with... It has a high-temperature resistant transparent glass observation hole; there are two rear furnace doors 15, which are respectively connected to the output end of the second drive device 31 and the double-layer furnace shell 7. The pure copper electrode 18 is installed on the rear furnace door 15 on the output end of the second drive device 31; when the heating component is needed, the rear furnace door 15 on the double-layer furnace shell 7 is removed, and then the rear furnace door 15 on the second drive device 31 is connected to the double-layer furnace shell 7 to seal the inner cavity of the double-layer furnace shell 7; when the cooling component is used, the rear furnace door 15 on the double-layer furnace shell 7 is used.

[0022] Example 2, as Figures 1-6 As shown, the present invention proposes a wide-temperature-range dynamic frequency conversion pressure coupling high-pressure torsion processing equipment. Compared with Embodiment 1, the torsion mechanism in this embodiment includes a four-column hydraulic press 3, an upper pressure head 5, a lower pressure head 10, a lower crossbeam panel 11, a rotary reducer 12, and an execution component. The rotary reducer 12 is installed in the support base 32; the four-column hydraulic press 3 is installed on the column 6; the upper pressure head 5 is installed on the upper crossbeam panel 4; the lower pressure head 10 is installed on the lower crossbeam panel 11; the lower crossbeam panel 11 is installed on the support base 32 and sleeved with the rotary reducer 12; the execution component is installed in the double-layer furnace shell 7; the output shaft of the rotary reducer 12 passes through the lower crossbeam panel 11 and is connected to the lower pressure head 10; the maximum output pressure of the four-column hydraulic press 3 is 300 tons, the working pressure range is 3~300 tons, and the pressure fluctuation accuracy is ≤±0.5%; the proportional control valve response time is ≤50ms, which can realize stepless adjustment of the dynamic pressure change range from 0~50%, that is, the pressure can be adapted in real time within ±50% of the set value.

[0023] The execution components include an upper anvil 21, a lower anvil 22, an upper mold 23, and a lower mold 24. The upper anvil 21 is mounted on the upper pressure head 5, and a pressure sensor is installed on the upper anvil 21, which moves up and down with the upper pressure head 5. The lower anvil 22 is mounted on the lower pressure head 10 and rotates with the lower pressure head 10. The insulation ring 20 is placed on the lower anvil 22. The lower mold 24 is fitted inside the lower anvil 22. The upper mold 23 is placed on the upper mold 24. The pressure sensor has a range of 0~350 tons, provides real-time feedback of pressure data, and forms a closed-loop control to ensure that the pressure output is consistent with the set curve.

[0024] Both the upper mold 23 and the lower mold 24 are made of WC-Co cemented carbide with a hardness ≥ HRA90 and a compressive strength ≥ 3000 MPa. The working surfaces are roughened with a surface roughness Ra = 3.2~6.3 μm to enhance friction with the workpiece and prevent slippage during twisting. The diameter is 200 mm and the flatness of the working surface is ≤ 0.02 mm to ensure uniform pressure transmission.

[0025] The rotary reducer 12 is driven by hydraulic pressure, with a speed adjustment range of 0.1~10rpm, a transmission ratio of 1:100, and a maximum output torque of 5000Nm. The output shaft of the rotary reducer 12 is rigidly connected to the lower pressure head 10 by bolts, and the lower pressure head 10 is rigidly connected to the lower anvil 22 by bolts. The transmission efficiency is ≥95%, and the torsion count control accuracy is ±0.1 turns.

[0026] This application also includes a main control cabinet 1 and a power supply cabinet 2. The main control cabinet 1 is equipped with a 10-inch touch screen, which can set temperature curves (heating rate, holding temperature, holding time), pressure parameters (target pressure, change range, change frequency), and torsional parameters (speed, number of torsional revolutions, direction of rotation), and displays the equipment operating status (temperature, pressure, torque, number of torsional revolutions, running time) in real time. The system has a built-in standard process database for more than 10 materials such as titanium alloy, nickel-based high-temperature alloy, and magnesium alloy, which can automatically match the optimal parameters. It also supports the storage and retrieval of custom parameters, and can store up to 100 sets of process schemes. Power supply is then controlled through the power supply cabinet 2.

[0027] In summary, in this application, the upper pressure head 5 is opened, the lower mold 24 is tightly fitted onto the lower anvil 22, and the upper mold 23 is tightly fitted onto the upper anvil 21. The workpiece is then fixed in the pre-reserved slot of the lower mold 24, ensuring that the workpiece, upper mold 23, and lower mold 24 are on the same axis. If heat treatment is required, drive device one 30 and drive device two 31 are activated to transport the induction heating coil 19 on the pure copper electrode 18 through the rear furnace door 15 to the upper mold 23, and the position of the induction heating coil 19 is adjusted. Then, the front furnace door 8 is closed, and induction heating is activated. The coil 19 is heated, and the temperature is monitored by the thermocouple temperature measuring element 16. Then, the four-column hydraulic press 3 is started, which drives the upper pressure head 5 to slowly press down, so that the upper mold 23 contacts the workpiece and begins to apply pressure. The pressure sensor provides real-time feedback of pressure data. Then, the rotary reducer 12 is started, and the lower mold 24 is driven to rotate through the lower pressure head 10, while the upper mold 23 remains fixed. The workpiece undergoes large plastic deformation under the combined action of axial pressure and tangential shear force. During the processing, the system collects pressure, temperature, torque, and torsion rotation data in real time, generates dynamic curves, and stores them.

[0028] When working at low temperatures, the front furnace door 8 is opened and the induction heating coil 19 is removed. The double-layer furnace shell 7 is sealed using the rear furnace door 15 on the double-layer furnace shell 7. Then, the low-temperature medium container 25 is placed inside the double-layer furnace shell 7, so that the lower anvil 22 is located in the middle of the low-temperature medium container 25. Subsequently, a circulating refrigeration circuit is formed through the liquid nitrogen spray port and reflux channel provided in the low-temperature medium container 25, thereby enabling processing in a low-temperature environment.

[0029] After processing, cooling water enters the furnace shell water inlet 26 from the water cooling system 13 and flows into the double-layer furnace shell 7 to cool the double-layer furnace shell 7. Then, it is discharged from the furnace shell water outlet 27. At the same time, cooling water enters the upper pressure head 5 from the pressure head water inlet 29 to cool the upper pressure head 5. Then, it is discharged from the pressure head water outlet 28. This achieves rapid cooling of the double-layer furnace shell 7 and the low-temperature medium container 25. During the cooling process, the upper mold 23 maintains pressure to prevent stress concentration when the workpiece cools and shrinks. After the pressure is released, the front furnace door 8 is opened, the workpiece is taken out, and the processing is completed.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A wide-temperature-range dynamic frequency conversion pressure coupling high-pressure torsion processing equipment, comprising a support base (32), characterized in that, Also includes: The load-bearing mechanism is mounted on the support base (32); An environmental device, which is installed on a load-bearing structure; A torsion mechanism, which is mounted on a support (32) and is used to adjust the torsional torque; The environmental structure includes a double-layer furnace shell (7), a heating component, a cooling component, and a circulation component; the double-layer furnace shell (7) is mounted on the torsion mechanism, the heating component is located outside the support base (32) and is used to heat the mold inside the bearing mechanism; the cooling component is mounted on the double-layer furnace shell (7) and is used for temperature detection and cooling; the circulation component is mounted on the double-layer furnace shell (7) and is used for circulating cooling; the heating component heats the mold and the cooling component lowers the temperature.

2. The wide-temperature-range dynamic frequency conversion pressure coupling high-pressure torsion processing equipment according to claim 1, characterized in that, The heating assembly includes a slide rail bracket (14), a pure copper electrode (18), an induction heating coil (19), a heat preservation ring (20), a drive device one (30), and a drive device two (31); the slide rail bracket (14) is located outside the support base (32), and the drive device one (30) is installed on the slide rail bracket (14); the drive device two (31) is installed on the moving end of the drive device one (30); the pure copper electrode (18) is installed on the driving end of the drive device two (31), and the pure copper electrode (18) is connected to the induction heating coil (19); the induction heating coil (19) moves to the outer periphery of the mold inside the double-layer furnace shell (7) to heat the mold.

3. The wide-temperature-range dynamic frequency conversion pressure coupling high-pressure torsion processing equipment according to claim 1, characterized in that, The refrigeration assembly includes a thermocouple temperature measuring element (16), a composite resistance vacuum gauge molecular pump (17), and a cryogenic medium container (25); the thermocouple temperature measuring element (16) is installed outside the double-layer furnace shell (7) and is used for temperature acquisition; the composite resistance vacuum gauge molecular pump (17) is installed outside the double-layer furnace shell (7) and is used for vacuuming inside the double-layer furnace shell (7); the cryogenic medium container (25) is placed inside the double-layer furnace shell (7) and is used for temperature reduction.

4. The wide-temperature-range dynamic frequency conversion pressure coupling high-pressure torsion processing equipment according to claim 1, characterized in that, The circulation assembly includes a water cooling system (13), a furnace shell water inlet (26), a furnace shell water outlet (27), a pressure head water outlet (28), and a pressure head water inlet (29); the water cooling system (13) is located outside the support base (32); the furnace shell water inlet (26) is connected to the bottom end of the double-layer furnace shell (7), and the furnace shell water outlet (27) is connected to the top of the double-layer furnace shell (7); cooling water enters the double-layer furnace shell (7) from the furnace shell water inlet (26) and then exits from the furnace shell water outlet (27); The pressure head inlet (29) is installed at the top of the upper pressure head (5), and the pressure head outlet (28) is installed inside the upper pressure head (5) and is connected to the pressure head inlet (29) through the upper pressure head (5).

5. The wide-temperature-range dynamic frequency conversion pressure coupling high-pressure torsion processing equipment according to claim 1, characterized in that, The supporting structure includes an upper crossbeam panel (4), a column (6), a front furnace door (8), a furnace frame (9), and a rear furnace door (15); the column (6) is installed on the top of the support base (32); the upper crossbeam panel (4) is fitted on the column (6); the front furnace door (8) and the rear furnace door (15) are both installed on the double-layer furnace shell (7), and the heating components enter the double-layer furnace shell (7) through the rear furnace door (15); the furnace frame (9) is installed on the column (6), and the double-layer furnace shell (7) is supported on the furnace frame (9).

6. The wide-temperature-range dynamic frequency conversion pressure coupling high-pressure torsion processing equipment according to claim 5, characterized in that, The torsion mechanism includes a four-column hydraulic press (3), an upper pressure head (5), a lower pressure head (10), a lower crossbeam panel (11), a rotary reducer (12), and an actuator; the rotary reducer (12) is installed inside the support base (32); the four-column hydraulic press (3) is installed on the column (6); the upper pressure head (5) is installed on the upper crossbeam panel (4); the lower pressure head (10) is installed on the lower crossbeam panel (11); the lower crossbeam panel (11) is installed on the support base (32) and is sleeved with the rotary reducer (12); the actuator is installed inside the double-layer furnace shell (7); the output shaft of the rotary reducer (12) passes through the lower crossbeam panel (11) and is connected to the lower pressure head (10).

7. The wide-temperature-range dynamic frequency conversion pressure coupling high-pressure torsion processing equipment according to claim 1, characterized in that, The execution components include an upper anvil (21), a lower anvil (22), an upper mold (23), and a lower mold (24); the upper anvil (21) is mounted on the upper pressure head (5), and a pressure sensor is mounted on the upper anvil (21), which moves up and down with the upper pressure head (5); the lower anvil (22) is mounted on the lower pressure head (10) and rotates with the lower pressure head (10); the heat insulation ring (20) is placed on the lower anvil (22); the lower mold (24) is fitted inside the lower anvil (22); and the upper mold (23) is placed on the upper mold (24).

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