Large scale oscillating hot press sintering furnace apparatus

Abstract

The utility model discloses a large -scale oscillation hot pressing sintering furnace device, including host computer, servo hydraulic system, oil cooling system, water cooling system and electrical and control system, servo hydraulic system links with actuator, is controlled to actuator through the servo valve and dynamic controller of parallel connection, and oil cooling system links with servo hydraulic system, provides circulation cooling for the hydraulic oil in oil tank, and electrical and control system links with high temperature furnace, and water cooling system links with high temperature furnace through the pipeline, provides cooling water for high temperature furnace, and electrical and control system links with actuator, high temperature furnace, hydraulic system, oil cooling system and water cooling system. The utility model greatly promotes equipment utilization and production efficiency, and its simple structure is convenient for implementation, and greatly reduces energy consumption and equipment cost.

Description

Technical Field

[0001] This utility model relates to material sintering equipment, and more particularly to a large-scale oscillating hot pressing sintering furnace device. Background Technology

[0002] Pressure sintering is an important method for preparing high-performance materials in the fields of ceramics and powder metallurgy. Applying axial mechanical pressure during sintering, the coupling of pressure and temperature accelerates the densification process and effectively inhibits grain growth. Simultaneously, pressure sintering can lower the sintering temperature, shorten the sintering time, and significantly reduce energy consumption, demonstrating a significant cost advantage in the production of high-performance materials and components with simple shapes. Pressure sintering furnaces generally employ a unidirectional loading method, relying on a hydraulic pump station to drive cylinders to provide pressure. The pressure and loading speed are controlled by adjusting the oil pressure and flow rate through proportional valves. Spark plasma sintering furnaces have modified the heating method based on hot-press sintering furnaces, but the pressure loading method still follows the design of hot-press sintering furnaces. In recent years, technologies such as mechanical vibration, microwave vibration, hydraulic vibration, electromagnetic resonance, and ultrasonic vibration have been introduced into the field of hot-press sintering, and oscillating hot-press sintering technology has gradually emerged. However, the loading pressure of currently developed oscillating hot-press sintering furnaces is limited, making it impossible to prepare large-size high-performance materials and components. On the other hand, when pressurization is achieved through a combination of static and dynamic pressure, the amplitude and frequency of the output oscillating pressure cannot be precisely controlled after the load on the pressure system is amplified. Furthermore, oscillating hot-pressing sintering furnaces with a single furnace body can only operate intermittently, resulting in low overall production efficiency and limiting their industrial application. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a large-scale oscillating hot pressing sintering furnace device.

[0004] This utility model discloses a large-scale oscillating hot pressing sintering furnace device, which includes a main unit, a servo hydraulic system, an oil cooling system, a water cooling system, and an electrical and control system.

[0005] The main unit is supported by a four-column main frame for strength and rigidity. The upper crossbeam of the main frame is equipped with actuators, and the lower crossbeam of the main frame is equipped with a movable working platform. Two high-temperature furnaces are installed on the movable working platform. The high-temperature furnaces are firmly fixed to the pressure plate by supports. The pressure plate and the slide rail system are connected together. Two sets of drive systems are symmetrically arranged on the slide rail system. The pressure plate is moved on the slide rail by a motor drive mechanism and a screw transmission mechanism, so as to realize the switching of the high-temperature furnace between different work positions.

[0006] The servo hydraulic system achieves a stable supply of high-flow oil through n sets of parallel servo motor pumps; the motor pumps are fixed on the outer shell of the oil tank, and the oil tank is designed with an inspection port; the hydraulic oil output by the pump enters the valve plate after passing through a filter, and the relief valve and check valve are both fixed on the valve plate to regulate the hydraulic pressure and flow; the hydraulic oil with constant pressure and flow is connected to the actuator through the main unit's oil outlet interface via a high-pressure oil pipe, and the return oil from the actuator flows into the main unit's return oil interface through the high-pressure oil pipe, and the return oil flows into the oil tank after passing through the return oil filter.

[0007] The oil cooling system is connected to the cold oil outlet and cold oil return ports on the servo hydraulic system via oil pipes. The oil cooling system circulates and cools the oil in the tank to ensure that the oil temperature in the tank remains stable at a constant temperature, which is beneficial for outputting a large flow of hydraulic oil with constant pressure.

[0008] The water cooling system is connected to the high-temperature furnace through pipelines to provide cold water to the furnace, enabling the sealing elements on the furnace body to work stably for a long time. At the same time, it can also remove heat from the furnace body during the cooling process, causing the furnace body temperature to drop continuously.

[0009] The electrical and control system is connected to the high-temperature furnace. It consists of a high-power three-phase AC transformer, power controller, temperature controller, and thermocouples or infrared temperature measuring devices to form a heating system that provides a uniform temperature field to the furnace body. The electrical and control system is also connected to the actuator, high-temperature furnace, servo hydraulic system, oil cooling system, and water cooling system to set and program the oscillation pressure, oscillation amplitude, oscillation frequency, heating and cooling regime, atmospheric environment, hydraulic system pressure, hydraulic system flow rate, oil temperature, and water temperature.

[0010] Furthermore, the movable work platform is also equipped with a lifting mechanism and a locking mechanism; after the lifting mechanism descends, the pressure plate and the lower crossbeam of the main frame fit together, and the locking mechanism closes to fix the pressure plate and the high-temperature furnace on the lower crossbeam; after the locking mechanism is released, the lifting mechanism rises and allows the pressure plate to separate from the lower crossbeam of the main frame, so that the pressure plate and the high-temperature furnace fixed on it can move on the work platform.

[0011] Furthermore, the motor drive mechanism and the lead screw transmission mechanism are installed on both sides of the movable work platform. The ball screw of the lead screw transmission mechanism is driven by the motor to move back and forth, thereby moving the pressure plate on the movable work platform, thereby driving the high-temperature furnace on the pressure plate to switch between different work stations. The different work stations are the oscillating hot pressing work station and the heating and cooling work station. The high-temperature furnace enters the oscillating hot pressing work station in staggered time according to the designed process rhythm.

[0012] Furthermore, the high-temperature furnace is equipped with an upper pressure head and a lower pressure head. The upper pressure head is tightly connected to the actuator, and the lower pressure head is connected to the pressure plate on the movable worktable.

[0013] Furthermore, the high-temperature furnace is connected to its corresponding vacuum pump unit, and a low vacuum is provided inside the furnace by opening different valves and vacuum pumps: 10 3 -10 -1 Pa, Medium vacuum: 10 -1 -10 -4 Pa, High vacuum: 10 -4 -10 -7 Pa represents three different environments.

[0014] Furthermore, the high-temperature furnace is connected to its corresponding atmosphere system, and argon, nitrogen, hydrogen and mixed gas are introduced into the furnace body to provide a special atmosphere for the sintering of samples in the furnace body, and to accelerate the cooling rate of the furnace body by using compressed gas.

[0015] Furthermore, the water-cooled electrodes on the high-temperature furnace are connected to their corresponding heating elements, transformers, and power controllers. Based on the data fed back by the thermocouples, the power controller adjusts the output power of the transformer to control the heating and cooling rates of the high-temperature furnace.

[0016] Furthermore, the high-temperature furnace is connected to its corresponding water-cooling system. Circulating cooling water flows in the furnace shell interlayer, water-cooled electrodes, and upper and lower pressure heads of the high-temperature furnace body, so that the furnace shell temperature, electrode temperature and upper and lower pressure head temperature are maintained within a safe range of 30-100℃, ensuring the airtightness and structural strength of the furnace body.

[0017] Furthermore, the servo hydraulic system consists of n parallel pump groups and hydraulic valve groups with a flow rate of Q, where n≥4; each pump group includes an independent servo motor and oil pump; the hydraulic oil with a flow rate of m*Q is stably output to the hydraulic cylinder through the n parallel pump groups and hydraulic valve groups, and the hydraulic pressure is precisely adjusted between 20-50MPa.

[0018] Furthermore, the hydraulic cylinders are equipped with m (m≥2) parallel flow rates F. x The system consists of servo valves and several accumulators, which are fixed to the hydraulic cylinders via valve plates. The control signal lines of all servo valves are connected in parallel to a dynamic servo controller. The number of servo valves, m, and the flow rate of each servo valve are determined based on the load and dynamic characteristics of the large-scale oscillating hot pressing sintering furnace. The flow rate F of the servo valves is 1.2-1.5 times (n*Q) / m. The AI ​​program autonomously optimizes and selects the numbers of the servo valves to be opened and closed, and precisely controls the output of the hydraulic cylinders through m parallel servo valves, thereby applying an oscillation pressure of 0-200MPa to the sample to be sintered at an oscillation frequency of 0-50Hz through the upper pressure head.

[0019] The beneficial technical effects of this utility model compared with the prior art are as follows:

[0020] This invention, by incorporating a movable worktable, enables two high-temperature furnaces to share a single oscillating pressure system, thereby reducing the idle time of the oscillating pressure system and significantly improving equipment utilization and production efficiency. The use of n (n≥4) parallel pump sets amplifies the flow rate of the servo hydraulic pump station, ensuring stable pressure and flow throughout the hydraulic pipeline. The installation of m (m≥2) parallel servo valves on the hydraulic cylinders ensures precise control of the oscillating pressure and frequency output from the high-load hydraulic cylinders. This large-scale oscillating hot-pressing sintering furnace has a simple structure, is easy to implement, significantly reduces energy consumption and equipment costs, and greatly improves production efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the large-scale oscillating hot pressing sintering furnace device of this utility model.

[0022] Figure 2 This is a schematic diagram of the main structure of the large-scale oscillating hot pressing sintering furnace device of this utility model.

[0023] Figure 3 This is a schematic diagram of the servo hydraulic system of the oscillating hot pressing sintering furnace device of this utility model.

[0024] In the diagram: 1-Main unit; 2-Servo hydraulic system; 3-Oil cooling system; 4-Water cooling system; 5-Electrical and control system; 6-Actuator; 7-Main unit frame; 8-High temperature furnace; 9-Pressure plate; 10-Slide rail system; 11-Motor drive mechanism; 12-Screw transmission mechanism; 13-Motor pump set; 14-Oil tank inspection port; 15-Filter; 16-Oil tank; 17-Cold oil outlet port; 18-Cold oil return port; 19-Main unit oil outlet port; 20-Main unit oil return port; 21-Return oil filter; 22-Relief valve; 23-Check valve; 24-Cabinet; 25-Electrical mounting plate. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] This utility model relates to a large-scale oscillating hot pressing sintering furnace device, such as... Figure 1 As shown, it includes a main unit 1, a servo hydraulic system 2, an oil cooling system 3, a water cooling system 4, and an electrical and control system 5.

[0027] like Figure 2As shown, the main unit 1 is supported by a four-column main unit frame 7 for strength and rigidity. The upper crossbeam of the main unit frame 7 is equipped with an actuator 6, and the lower crossbeam of the main unit frame 7 is equipped with a movable working platform. Two high-temperature furnaces 8 are installed on the movable working platform. The high-temperature furnaces 8 are firmly fixed to the pressure plate 9 by supports. The pressure plate 9 is connected to the slide rail system 10. Two sets of drive systems are symmetrically arranged on the slide rail system 10. The pressure plate 9 is moved on the slide rail by the motor drive mechanism 11 and the screw transmission mechanism 12, so as to realize the switching of the high-temperature furnace 8 between different work positions.

[0028] like Figure 3 As shown, the servo hydraulic system 2 achieves a stable supply of high-flow oil through n sets of parallel servo motor pump sets 13; the motor pump sets 13 are fixed on the outer shell of the oil tank 16, and the oil tank 16 is designed with an oil tank inspection port 14; the hydraulic oil output by the oil pump enters the valve plate through the filter 15, and the overflow valve 22 and the check valve 23 are both fixed on the valve plate to regulate the hydraulic pressure and flow; the hydraulic oil with constant pressure and flow is connected to the actuator 6 through the main unit oil outlet interface 19 and the high-pressure oil pipe, and the return oil on the actuator 6 flows into the main unit return oil interface 20 through the high-pressure oil pipe, and the return oil flows into the oil tank 16 after passing through the return oil filter 21.

[0029] The oil cooling system 3 is connected to the cold oil outlet port 17 and cold oil return port 18 on the servo hydraulic system 2 via oil pipes. The oil cooling system 3 circulates and cools the oil in the oil tank 16 to ensure that the oil temperature in the oil tank 16 is stable at a constant temperature, which is conducive to the output of a large flow of hydraulic oil with constant pressure.

[0030] The water cooling system 4 is connected to the high-temperature furnace 8 through pipelines to provide cold water to the high-temperature furnace 8, so that the sealing elements on the furnace body can work stably for a long time. At the same time, it can also remove the heat inside the furnace body during the cooling process, so that the furnace body temperature continues to drop.

[0031] The electrical and control system 5 is connected to the high-temperature furnace 8. It forms a heating system through a high-power three-phase AC transformer, power controller, temperature controller, and thermocouple or infrared temperature measuring device to provide a uniform temperature field to the furnace body. The electrical and control system 5 is connected to the actuator 6, the high-temperature furnace 8, the servo hydraulic system 2, the oil cooling system 3, and the water cooling system 4. It sets and programs the oscillation pressure, oscillation amplitude, oscillation frequency, heating and cooling regime, atmospheric environment, hydraulic system pressure, hydraulic system flow, oil temperature, and water temperature.

[0032] Furthermore, the high-temperature furnace 8 is equipped with water-cooled electrodes, thermocouples, and a furnace door; the high-temperature furnace 8 contains a heating element and an insulation layer; the water-cooled electrodes, heating element, transformer, and power controller on the high-temperature furnace 8 are connected.

[0033] Furthermore, the movable work platform is also equipped with a lifting mechanism and a locking mechanism; after the lifting mechanism descends, the pressure plate 9 and the lower crossbeam of the main frame 7 are attached together, and the locking mechanism is closed to fix the pressure plate 9 and the high-temperature furnace 8 on the lower crossbeam; after the locking mechanism is released, the lifting mechanism rises and the pressure plate 9 is separated from the lower crossbeam of the main frame 7, so that the pressure plate 9 and the high-temperature furnace 8 fixed on it can move on the work platform.

[0034] Furthermore, the motor drive mechanism 11 and the lead screw transmission mechanism 12 are installed on both sides of the movable work platform. The ball screw of the motor drive mechanism 12 moves back and forth, thereby driving the pressure plate 9 on the movable work platform to switch between different work stations. The different work stations are the oscillating hot pressing work station and the heating and cooling work station. The high temperature furnace 8 enters the oscillating hot pressing work station in staggered time according to the designed process rhythm.

[0035] Furthermore, the high-temperature furnace 8 is equipped with an upper pressure head and a lower pressure head. The upper pressure head is tightly connected to the hydraulic cylinder on the actuator (6), and the lower pressure head is connected to the pressure plate 9 on the movable workbench. The hydraulic cylinder is connected to the servo control system and the servo hydraulic pump station.

[0036] The servo hydraulic system can provide a stable oil source with a high flow rate of ≥200L / min through parallel motor pump sets. The pressure output load is ≥1000KN, and the oscillation pressure frequency is adjustable within the range of 0-50Hz. The oscillation pressure can quickly remove closed pores in the sintered body at high temperature by stimulating plastic deformation and atomic diffusion. It also inhibits grain growth by forming straight grain boundaries, low-energy interfaces, and crystal defects, thus significantly improving the density and mechanical properties of the material.

[0037] Furthermore, the high-temperature furnace 8 is connected to its corresponding vacuum pump unit, and a low vacuum is provided inside the furnace by opening different valves and vacuum pumps: 10 3 -10 -1 Pa, Medium vacuum: 10 -1 -10 -4 Pa, High vacuum: 10 -4 -10 -7 Pa represents three different environments.

[0038] Furthermore, the high-temperature furnace 8 is connected to its corresponding atmosphere system, and argon, nitrogen, hydrogen and mixed gas are introduced into the furnace body to provide a special atmosphere for the sintering of samples in the furnace body, and to accelerate the cooling rate of the furnace body by using compressed gas.

[0039] Furthermore, the water-cooled electrodes on the high-temperature furnace 8 are connected to their corresponding heating elements, transformers, and power controllers respectively; based on the data fed back by the thermocouples, the output power of the transformer is adjusted by the power controller to control the heating and cooling rates of the high-temperature furnace 8.

[0040] Furthermore, the high-temperature furnace 8 is connected to its corresponding water-cooling system 4. Circulating cooling water flows in the furnace shell interlayer, water-cooled electrodes, and upper and lower pressure heads of the high-temperature furnace 8, so that the furnace shell temperature, electrode temperature and upper and lower pressure head temperature are maintained within a safe range of 30-100℃, ensuring the airtightness and structural strength of the furnace body.

[0041] Furthermore, the servo hydraulic system 2 consists of n parallel pump groups and hydraulic valve groups with a flow rate of Q, where n≥4; each pump group includes an independent servo motor and oil pump; the hydraulic oil with a flow rate of m*Q is stably output to the hydraulic cylinder through the n parallel pump groups and hydraulic valve groups, and the hydraulic pressure is precisely adjusted between 20-50MPa.

[0042] Furthermore, the hydraulic cylinders are equipped with m (m≥2) parallel flow rates F. x The system consists of servo valves and several accumulators, which are fixed to the hydraulic cylinders via valve plates. The control signal lines of all servo valves are connected in parallel to a dynamic servo controller. The number of servo valves, m, and the flow rate of each servo valve are determined based on the load and dynamic characteristics of the large oscillating hot pressing sintering furnace. The flow rate F of the servo valves is 1.2-1.5 times (n*Q) / m. The output of the hydraulic cylinders is precisely controlled by m parallel servo valves, thereby applying an oscillating pressure of 0-200MPa to the sample to be sintered at an oscillating frequency of 0-50Hz through the upper pressure head.

[0043] Furthermore, based on the oscillation pressure, oscillation pressure auxiliary value, and oscillation frequency required during the operation of the large oscillating hot pressing sintering furnace, the dynamic servo controller can autonomously optimize and select the numbers of the servo valves that need to be opened and closed through an AI program.

[0044] Furthermore, the servo hydraulic pump station is connected to an oil cooler, which can maintain the oil temperature in the pump station at a constant temperature, thereby improving the accuracy of the oscillation pressure and oscillation frequency output by the hydraulic cylinder.

[0045] Furthermore, the oscillation pressure, oscillation frequency, heating and cooling process, vacuum level, atmosphere pressure, circulating water temperature, and hydraulic oil temperature can all be monitored and controlled by specialized software, and the relevant data can be automatically stored, processed, and displayed.

[0046] Example 1:

[0047] The overall structure of a large-scale oscillating hot pressing sintering furnace device is as follows: Figure 1As shown, the system includes a main unit 1, a servo hydraulic system 2, an oil cooling system 3, a water cooling system 4, and an electrical and control system 5. The servo hydraulic system 2 is connected to the actuator 6, controlling it via parallel servo valves and a dynamic controller to ensure precise output of oscillation pressure, oscillation pressure amplitude, and oscillation frequency. The oil cooling system 3, connected to the servo hydraulic system, provides circulating cooling for the hydraulic oil in the tank, ensuring a stable oil temperature, which is beneficial for outputting a large flow of hydraulic oil with stable pressure. The electrical and control system 5 is connected to the high-temperature furnace 8, forming a heating system consisting of a high-power three-phase AC transformer, a power controller, a temperature controller, and thermocouples or infrared temperature measuring devices, providing a uniform temperature field within the furnace. The water cooling system 4, connected to the high-temperature furnace 8 via pipelines, provides cooling water to the furnace, enabling the sealing elements on the furnace body to operate stably for extended periods. It also removes heat from the furnace body during the cooling process, causing the furnace temperature to continuously decrease. The electrical and control system 5 is connected to the actuator 6, high-temperature furnace 8, hydraulic system 2, oil cooling system 3 and water cooling system 4, and can set and program the oscillation pressure, oscillation amplitude, oscillation frequency, heating and cooling regime, atmospheric environment, hydraulic system pressure, hydraulic system flow, oil temperature and water temperature.

[0048] Example 2

[0049] The main structure of a large-scale oscillating hot pressing sintering furnace device is as follows: Figure 2As shown. The main unit 1 is supported by a four-column main unit frame 7 for strength and rigidity, on which two square high-temperature furnaces 8 with front-opening structures are installed. The high-temperature furnace 8 has a water-cooled jacket and can be circulated with cooling water. The high-temperature furnace is equipped with an upper pressure head, a lower pressure head, a bellows-structured vacuum flange, water-cooled electrodes, thermocouples, infrared thermometers, a vacuum interface, an atmosphere interface, and an observation window. The high-temperature furnace 8 is equipped with a square or ring-shaped heating element, which can be a molybdenum heating element, a tungsten heating element, or a graphite heating element. The heating element is externally equipped with a multi-layer insulation structure, including a metal heat shield and multiple layers of flexible graphite felt. The vacuum interface of the high-temperature furnace 8 is connected to a vacuum pump, a solenoid valve, and vacuum instruments. The vacuum pump can be a mechanical pump, a direct-drive pump, a diffusion pump, or a molecular pump, or multiple vacuum pumps can be used simultaneously. The atmosphere interface of the high-temperature furnace 8 can be connected to an external gas source system. The gas introduced can be dry air, argon, nitrogen, hydrogen, or a mixture of gases. The high-temperature furnace 8 is firmly fixed to the pressure plate 9 by a support. The pressure plate 9 is connected to the slide rail system 10. Two sets of drive systems are symmetrically arranged on the slide rail system 10. The pressure plate can be moved on the slide rail by the motor drive mechanism 11 and the screw transmission mechanism 12, so as to realize the switching of the high-temperature furnace 8 between different working positions. The slide rail is equipped with a locking system and a lifting system. When the high-temperature furnace is working in the oscillation and pressurization position, the lifting system descends, allowing the pressure plate to fall on the crossbeam of the main frame. The locking system fixes the pressure plate to prevent the furnace body from moving during the loading process. When the high-temperature furnace exits the oscillation and pressurization position, the locking system will unlock, the lifting system will rise, and the pressure plate, carrying the high-temperature furnace and its auxiliary equipment, can be moved to the heating and cooling position through the slide rail system 10.

[0050] Example 3

[0051] The structure of a servo hydraulic system for a large-scale oscillating hot pressing sintering furnace is as follows: Figure 3As shown. The hydraulic system 2 provides a stable oil supply of 800L / min through four sets of parallel servo motor pump sets 13. The motor pump sets are fixed on the outer shell of the oil tank 16, which is designed with an oil tank inspection port 14 for easy maintenance of the oil pump and other hydraulic components inside the oil tank. The hydraulic oil output from the oil pump enters the valve plate through the filter 15. The relief valve 22 and the check valve 23 are both fixed on the valve plate to regulate the hydraulic pressure and flow. The hydraulic oil with stable pressure and flow is connected to the actuator 6 through the main unit oil outlet port 19 and a high-pressure oil pipe. The return oil from the actuator 6 flows into the main unit return oil port 20 through the high-pressure oil pipe and passes through the return oil filter 2. The oil flows into the oil tank 16 after 1. The actuator 6 is equipped with 4 high-frequency servo valves and 2 accumulators. The control signal lines of the high-frequency servo valves are connected in parallel to a dynamic servo controller. The AI ​​program autonomously optimizes and selects the numbers of the servo valves to be opened and closed, and precisely controls the oscillation pressure, oscillation pressure auxiliary value and oscillation frequency of the hydraulic cylinder output through the dynamic servo controller. The oil cooling system 3 is connected to the cold oil outlet port 17 and cold oil return port 18 on the hydraulic system 2 through oil pipes. The oil cooling system 3 circulates and cools the oil in the oil tank 16 to ensure that the oil temperature in the oil tank 16 is stable at a constant temperature, which is conducive to the output pressure of a large flow of hydraulic oil.

Claims

1. A large-scale oscillating hot pressing sintering furnace apparatus, characterized in that, It includes a main unit (1), a servo hydraulic system (2), an oil cooling system (3), a water cooling system (4), and an electrical and control system (5); The main unit (1) is supported by a four-column main unit frame (7) for strength and rigidity. The upper crossbeam of the main unit frame (7) is equipped with an actuator (6), and the lower crossbeam of the main unit frame (7) is equipped with a movable working platform. Two high-temperature furnaces (8) are installed on the movable working platform. The high-temperature furnaces (8) are firmly fixed on the pressure plate (9) by the support. The pressure plate (9) and the slide rail system (10) are connected together. Two sets of drive systems are symmetrically arranged on the slide rail system (10). The pressure plate (9) is moved on the slide rail by the motor drive mechanism (11) and the screw transmission mechanism (12), so that the high-temperature furnace (8) can switch between different work positions. The servo hydraulic system (2) achieves a large flow rate and stable oil supply through n sets of parallel servo motor pump sets (13); the motor pump set (13) is fixed on the outer shell of the oil tank (16), and the oil tank (16) is designed with an oil tank maintenance port (14); the hydraulic oil output by the oil pump enters the valve plate through the filter (15), and the overflow valve (22) and the check valve (23) are both fixed on the valve plate to regulate the hydraulic pressure and flow rate; the hydraulic oil with constant pressure and flow rate is connected to the actuator (6) through the main unit oil outlet interface (19) and the high pressure oil pipe; the return oil on the actuator (6) flows into the main unit return oil interface (20) through the high pressure oil pipe; the return oil flows into the oil tank (16) after passing through the return oil filter (21); The oil cooling system (3) is connected to the cold oil outlet (17) and cold oil return (18) on the servo hydraulic system (2) through oil pipes. The oil cooling system (3) circulates and cools the oil in the oil tank (16) to ensure that the oil temperature in the oil tank (16) is stable at a constant temperature, which is conducive to outputting a large flow of hydraulic oil with constant pressure. The water cooling system (4) is connected to the high-temperature furnace (8) through pipelines to provide cold water to the high-temperature furnace (8), so that the sealing elements on the furnace body can work stably for a long time, and at the same time, it can remove the heat in the furnace body during the cooling process, so that the furnace body temperature continues to drop. The electrical and control system (5) is connected to the high-temperature furnace (8) and forms a heating system through a high-power three-phase AC transformer, power controller and temperature controller, as well as thermocouples or infrared temperature measuring devices to provide a uniform temperature field to the furnace body. The electrical and control system (5) is connected to the actuator (6), the high-temperature furnace (8), the servo hydraulic system (2), the oil cooling system (3) and the water cooling system (4) to set and program the oscillation pressure, oscillation amplitude, oscillation frequency, heating and cooling regime, atmospheric environment, hydraulic system pressure, hydraulic system flow, oil temperature and water temperature.

2. The large-scale vibrating hot pressing sintering furnace apparatus according to claim 1, characterized in that, The movable work platform is also equipped with a lifting mechanism and a locking mechanism. After the lifting mechanism is lowered, the pressure plate (9) and the lower crossbeam of the main frame (7) are attached together. The locking mechanism is closed to fix the pressure plate (9) and the high-temperature furnace (8) on the lower crossbeam. After the locking mechanism is released, the lifting mechanism rises and the pressure plate (9) is separated from the lower crossbeam of the main frame (7), so that the pressure plate (9) and the high-temperature furnace (8) fixed on it can move on the work platform.

3. The large-scale oscillating hot pressing sintering furnace apparatus according to claim 1, characterized in that, The motor drive mechanism (11) and the lead screw transmission mechanism (12) are installed on both sides of the movable working platform. The ball screw of the lead screw transmission mechanism (12) is driven by the motor to move, and the pressure plate (9) on the movable working platform moves back and forth, thereby driving the high temperature furnace (8) on the pressure plate (9) to switch between different work positions. The different work positions are the oscillating hot pressing work position and the heating and cooling work position. The high temperature furnace (8) enters the oscillating hot pressing work position in staggered time according to the designed process rhythm.

4. The large-scale vibrating hot pressing sintering furnace apparatus according to claim 1, characterized in that, The high-temperature furnace (8) is equipped with an upper pressure head and a lower pressure head. The upper pressure head is tightly connected to the actuator (6), and the lower pressure head is connected to the pressure plate (9) on the movable workbench.

5. The large-scale oscillating hot pressing sintering furnace apparatus according to claim 1, characterized in that, The high-temperature furnace (8) is connected to its corresponding vacuum pump group, and a low vacuum is provided inside the furnace by opening different valves and vacuum pumps: 10 3 -10 -1 Pa, Medium vacuum: 10 -1 -10 -4 Pa, High vacuum: 10 -4 -10 -7 Pa represents three different environments.

6. The large-scale oscillating hot pressing sintering furnace apparatus according to claim 1, characterized in that, The high-temperature furnace (8) is connected to its corresponding atmosphere system, and argon, nitrogen, hydrogen and mixed gas are introduced into the furnace body to provide a special atmosphere for the sintering of the samples in the furnace body, and to accelerate the cooling rate of the furnace body by using compressed gas.

7. The large-scale vibrating hot pressing sintering furnace apparatus according to claim 1, characterized in that, The water-cooled electrodes on the high-temperature furnace (8) are connected to their corresponding heating elements, transformers, and power controllers respectively. Based on the data fed back by the thermocouples, the output power of the transformer is adjusted by the power controller to control the heating and cooling rates of the high-temperature furnace (8).

8. The large-scale oscillating hot pressing sintering furnace apparatus according to claim 1, characterized in that, The high-temperature furnace (8) is connected to its corresponding water cooling system (4). Circulating cooling water flows in the furnace shell interlayer, water-cooled electrodes, and upper and lower pressure heads of the high-temperature furnace (8) body, so that the furnace shell temperature, electrode temperature and upper and lower pressure head temperature are maintained within a safe range of 30-100℃, ensuring the airtightness and structural strength of the furnace body.

9. The large-scale vibrating hot pressing sintering furnace apparatus according to claim 1, characterized in that, The servo hydraulic system (2) consists of n parallel pump groups and hydraulic valve groups with a flow rate of Q, where n≥4; each pump group includes an independent servo motor and oil pump; the hydraulic oil with a flow rate of m*Q is stably output to the hydraulic cylinder through the n parallel pump groups and hydraulic valve groups, and the hydraulic pressure is precisely adjusted between 20-50MPa.

10. The large-scale vibrating hot pressing sintering furnace apparatus according to claim 1, characterized in that, The hydraulic cylinder is equipped with m parallel flow rates F x The system consists of servo valves and several accumulators, which are fixed to the hydraulic cylinders via valve plates. The control signal lines of all servo valves are connected in parallel to a dynamic servo controller. The number of servo valves, m, and the flow rate of each servo valve are determined based on the load and dynamic characteristics of the large-scale oscillating hot pressing sintering furnace. The flow rate F of the servo valves is 1.2-1.5 times (n*Q) / m. The AI ​​program autonomously optimizes and selects the numbers of the servo valves to be opened and closed, and precisely controls the output of the hydraulic cylinders through m parallel servo valves, thereby applying an oscillation pressure of 0-200MPa to the sample to be sintered at an oscillation frequency of 0-50Hz through the upper pressure head.

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