Power converter die casting device and die casting method thereof

Abstract

The invention discloses a power converter die-casting device and a die-casting method thereof, relates to the technical field of die-casting devices, and aims to solve the problems that a smelting furnace of the die-casting device adopts argon rotary blowing refining, the efficiency is low, vortex slag entrapment can be generated, meanwhile, a ceramic filter screen needs to be matched for filtering, but the ceramic filter screen is quick to block and needs to be frequently replaced, and the cost is high. A smelting furnace is arranged at the upper end of one side of the die-casting device, a traveling wave electromagnetic field generator is fixedly installed below the smelting furnace, a stirring shaft is rotatably installed in the smelting furnace, the outer portion of the upper end of the stirring shaft is fixedly sleeved with a slag discharging mechanism, and a slag collecting box is installed at the lower end of the slag discharging mechanism. And a negative pressure pump is arranged at the upper end of the slag discharging mechanism, a porous ceramic suction nozzle is installed at the bottom of the interior of the slag collecting box, and two pulse ultrasonic sensors are symmetrically and obliquely installed in the middle of the inner wall of the smelting furnace.

Description

Technical Field

[0001] This invention relates to the field of die-casting equipment technology, and in particular to a power converter die-casting device and its die-casting method. Background Technology

[0002] The power converter die-casting unit is a specialized piece of equipment for die-casting core components of power converters, such as housings, heat dissipation structures, and internal support frames. It integrates key functions such as metal melting, precision mold control, pressure injection, and molding cooling to meet the stringent requirements of power converters for component dimensional accuracy, structural strength, and heat dissipation performance. This unit typically consists of a die-casting machine, a mold system, a melting and holding furnace, a hydraulic control system, a cooling system, and automated auxiliary equipment. During operation, lightweight, high-strength metal materials such as aluminum alloys and magnesium alloys are first heated to a molten state in the melting furnace. Then, the molten metal is injected into a precisely designed mold cavity at high pressure and high speed through the die-casting machine's injection mechanism. The metal rapidly cools and solidifies within the mold, ultimately obtaining a casting that conforms to the design parameters of the power converter component. Its core advantage lies in its ability to achieve one-time molding of complex structures, significantly improving production efficiency. At the same time, by precisely controlling the injection speed, pressure, and mold temperature, it ensures that the internal structure of the casting is dense and the surface finish is high, effectively reducing subsequent processing steps. In addition, in response to the special requirements of power converters such as heat dissipation and insulation, the device can be used with special molds to realize structural designs such as heat dissipation fins and insert integration, enhancing the functionality and reliability of components. It is widely used in the mass production of power conversion equipment such as switching power supplies, inverters, and charging piles, and is a key piece of equipment in the power converter manufacturing process to ensure component quality and production efficiency.

[0003] Chinese Patent Publication No. CN217595873U discloses a magnesium alloy rod extrusion casting production apparatus, including a support frame. A hydraulic piston rod is hinged to the bottom surface of the inner wall of the support frame via a hinge seat. A steel bell-shaped sealing piston head is fixedly connected to the output end of the hydraulic piston rod. A die is fixedly connected to the inner wall of the support frame, and the die is slidably connected to the steel bell-shaped sealing piston head. A feeding port is provided through the surface and inner wall of the die, and an argon gas inlet is provided on the surface of the support frame. This apparatus facilitates the extrusion casting production of magnesium alloy rods, resulting in extruded magnesium rods with uniform composition, fine internal structure, and improved mechanical properties. It is suitable for direct refining from crude magnesium, eliminating the burning loss and energy consumption of secondary remelting. The production method is simple, improving automation and efficiency. Furthermore, the extruded magnesium rods significantly improve the mechanical properties of the material and can be directly used in the forging production of large wheel hubs.

[0004] The existing technical solutions mentioned above have the following drawbacks: power converters require high purity of molten aluminum, but the furnace of the die-casting device uses argon rotary spray refining, which is inefficient and produces vortex slag. At the same time, it needs to be used with ceramic filters for filtration, but ceramic filters clog quickly and need to be replaced frequently, increasing downtime costs. Therefore, we propose a power converter die-casting device and its die-casting method to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a power converter die-casting device and its die-casting method, in order to solve the problems mentioned in the background art, such as the low efficiency of argon rotary blowing refining furnace, the generation of vortex slag, and the need for ceramic filter screen for filtration, which leads to rapid clogging and frequent replacement, increasing downtime costs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a power converter die-casting device, comprising a die-casting device and a die-casting control system, wherein a furnace is provided at the upper end of one side of the die-casting device, a traveling wave electromagnetic field generator is fixedly installed below the furnace, a stirring shaft is rotatably installed inside the furnace, a slag discharge mechanism is fixedly fitted on the outer side of the upper end of the stirring shaft, a slag collection box is installed at the lower end of the slag discharge mechanism, a negative pressure pump is provided at the upper end of the slag discharge mechanism, a multi-hole ceramic suction nozzle is installed at the bottom inside the slag collection box, and two pulse ultrasonic sensors are symmetrically and obliquely installed at the middle position of the inner wall of the furnace.

[0007] Preferably, an injection mechanism is provided on one side below the furnace, a fixed mold is provided at the upper end of the die-casting device, and a moving mold is slidably installed on one side of the fixed mold, with the moving mold located on one side of the injection mechanism.

[0008] Preferably, a robotic arm slide rail is installed on one side of the die-casting device, a robotic arm is slidably installed above the robotic arm slide rail, and a Bernoulli suction cup is installed on one side of the upper end of the robotic arm.

[0009] Preferably, a vision inspection table is installed on one side of the robotic arm, a material support screw is installed at the lower middle position inside the vision inspection table, a material support plate is driven and installed above the material support screw, a detection first screw is installed on the upper inner wall inside the vision inspection table, a detection second screw is driven and installed below the detection first screw, a mounting base is driven and installed below the detection second screw, and a camera and a D-contour sensor are respectively installed below the mounting base.

[0010] Preferably, a stirring motor is installed at the upper center of the furnace, the output end of the stirring motor is driven to the stirring shaft, and a stirring paddle is fixedly fitted on the outside of the stirring shaft.

[0011] Preferably, the upper end of the slag discharge mechanism is provided with a slag discharge mechanism fixing frame, one end of the slag discharge mechanism fixing frame is fixedly fitted onto the outside of the upper end of the stirring shaft, and symmetrical electric telescopic cylinders for the slag discharge mechanism are installed below the slag discharge mechanism fixing frame. The upper end of the electric telescopic cylinder for the slag discharge mechanism is fixedly connected to the slag discharge mechanism fixing frame, and the lower end of the electric telescopic cylinder for the slag discharge mechanism is fixedly connected to the upper end of the slag collection box.

[0012] Preferably, the air inlet of the negative pressure pump is sealed to the porous ceramic nozzle via a suction pipe, and the air outlet of the negative pressure pump is sealed to the negative pressure tank via a connecting pipe.

[0013] Preferably, the slag collection box has a slag collection nozzle at its front end, and a slag collection groove is formed inside the slag collection box. The lower end of the slag collection groove, away from the slag collection nozzle, gradually decreases in height, and the porous ceramic suction nozzle is located at the lower end inside the slag collection groove.

[0014] Preferably, the die-casting control system is internally equipped with a control unit, and the camera, D-profile sensor and pulse ultrasonic sensor are electrically connected to the control unit. The control unit is electrically connected to the robotic arm, Bernoulli suction cup, negative pressure pump and slag discharge mechanism electric telescopic cylinder.

[0015] A die-casting method for a power converter die-casting apparatus includes the following steps:

[0016] Step 1: The furnace melts raw materials such as aluminum alloy or magnesium alloy. During this process, the stirring motor drives the stirring shaft and stirring paddle to rotate, so that the composition of the molten metal is uniformly fused. The pulse ultrasonic sensor is immersed in the solution and emits a 100-MHz high-frequency pulse ultrasonic wave. When the sound wave encounters slag particles, it generates a scattered echo. By analyzing the echo intensity and delay, a three-dimensional slag particle distribution map of the melt is constructed in real time.

[0017] Step Two: When slag particles are detected in the solution, the pulsed ultrasonic sensor sends a signal to the control unit. The control unit then activates the traveling wave electromagnetic field generator, which generates a switching current. The three-phase current synthesizes a directional moving magnetic field. The moving magnetic field interacts with the induced eddy currents to generate a directional electromagnetic force. The traveling wave magnetic field penetrates the molten aluminum, inducing closed eddy currents within the melt. The eddy currents interact with the magnetic field, causing the magnetic field to move vertically and oscillate periodically in the vertical direction. Under this vertical oscillation, the slag particles move relative to each other due to density differences and Stokes resistance. The slag particles have high inertia and lag behind the movement of the molten aluminum, causing them to continuously float and accumulate, forming a high-concentration slag layer. At this point, the control unit controls the slag removal mechanism to perform slag removal operations. The control unit controls the electric telescopic cylinder of the slag removal mechanism to extend, so that the lower end of the slag collection nozzle of the slag collection box is lower than the solution surface by millimeters, thereby collecting the slag particles on the solution surface. The slag particles flow into the slag collection tank along with a small amount of molten liquid. The negative pressure pump is then activated, generating negative pressure to draw the molten liquid containing slag particles into the negative pressure tank through the suction pipe and connecting pipe.

[0018] Step 3: The purified molten metal is precisely delivered to the injection chamber of the injection mechanism by a high-precision quantitative molten metal supply system, ensuring that the supply amount matches the casting requirements each time. Then, the injection mechanism uses a vacuum-assisted multi-stage injection filling system to inject the molten metal into the mold cavity composed of a fixed mold and a moving mold at a preset speed and pressure. The dynamically adjustable mold exhaust system dynamically adjusts the exhaust baffle according to the air pressure in the cavity to efficiently discharge gas. The intelligent mold system with zoned temperature control accurately controls the temperature of different areas of the mold to ensure that the molten metal cools and forms quickly.

[0019] Step 4: After molding, the moving mold opens, and the robotic arm moves along the robotic arm slide rail. It picks up the casting using a Bernoulli suction cup and transfers it to the top of the support plate on the vision inspection table. The support plate is moved into the vision inspection table by the support screw. The extended electric telescopic cylinder of the vision inspection table pushes the sliding plate down, thereby bringing the camera and D-profile sensor closer to the casting. The first and second detection screws move in coordination, causing the mounting base to move back and forth and left and right. This allows the camera and D-profile sensor on the mounting base to perform a comprehensive inspection of the casting. The inspection data is fed back to the control unit of the die-casting control system in real time. If the casting is unqualified, the control unit automatically adjusts the next injection parameters based on the unqualified parameters, adjusting the pressure replenishment time, mold temperature, and cooling time to reduce the outflow of defective products.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This invention significantly improves the purity of molten metal through the collaborative working mechanism of the furnace purification system. Closed-loop control of the traveling wave electromagnetic field and pulsed ultrasonic sensor efficiently separates and removes slag particles from the molten metal, preventing impurities from affecting the quality of castings. This results in a denser internal structure for the formed power converter components, reducing performance risks caused by inclusion defects and ensuring the stability of components during long-term use. Precise operation control of the slag removal mechanism optimizes the slag removal process, ensuring slag removal is completed without disrupting the normal smelting rhythm. The precise positioning of the slag collecting nozzle and the slag-molten metal separation design improve slag removal efficiency, reduce molten metal waste, lower raw material consumption, and avoid operational errors and safety risks associated with manual slag removal, making the production process more stable and safer.

[0022] 2. This invention's multi-dimensional collaborative visual inspection system enables comprehensive, blind-spot-free inspection of castings, capturing potential defects on the surface and inside the castings. This efficient inspection method ensures timely identification of defective products, preventing them from flowing into subsequent processes, reducing rework costs, and providing accurate data for adjusting production parameters, thus contributing to continuous improvement in product quality. The adaptive parameter adjustment function of the control unit enables the equipment to intelligently optimize the production process, automatically adjusting relevant parameters based on real-time inspection data, reducing manual intervention, improving the stability and consistency of the production process, and reducing quality fluctuations caused by human error. The fault self-diagnosis mechanism improves equipment reliability and maintenance efficiency, enabling rapid identification and response to equipment anomalies, timely remedial measures, reducing production interruptions caused by equipment failures, ensuring production continuity, and reducing economic losses from downtime. Attached Figure Description

[0023] Figure 1 This is the front view of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the visual inspection station in this invention;

[0025] Figure 3 This is a schematic diagram of the furnace structure in this invention;

[0026] Figure 4 This is a schematic diagram of the slag collection box in this invention;

[0027] Figure 5 This is a schematic diagram illustrating the principle of the present invention.

[0028] In the diagram: 1. Die-casting device; 2. Furnace; 3. Injection mechanism; 4. Fixed mold; 5. Moving mold; 6. Robotic arm; 7. Robotic arm slide rail; 8. Bernoulli suction cup; 9. Vision inspection table; 10. Material support screw; 11. Material support plate; 12. Vision inspection table electric telescopic cylinder; 13. Sliding plate; 14. First detection screw; 15. Second detection screw; 16. Mounting base; 17. Camera; 18. 3D contour sensor; 19. Stirring motor; 20. Stirring shaft; 21. Stirring paddle; 22. Slag discharge mechanism; 23. Slag discharge mechanism fixing frame; 24. Negative pressure pump; 25. Connecting pipe; 26. Suction pipe; 27. Slag discharge mechanism electric telescopic cylinder; 28. Slag collection box; 29. ​​Slag collection nozzle; 30. Multi-hole ceramic suction nozzle; 31. Slag collection trough; 32. Die-casting control system; 33. Control unit; 34. Pulse ultrasonic sensor; 35. Traveling wave electromagnetic field generator. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Please see Figure 1-5 An embodiment of the present invention provides a power converter die-casting device, including a die-casting device 1 and a die-casting control system 32. A furnace 2 is provided at the upper end of one side of the die-casting device 1. A traveling wave electromagnetic field generator 35 is fixedly installed below the furnace 2. A stirring shaft 20 is rotatably installed inside the furnace 2. A slag discharge mechanism 22 is fixedly fitted on the outside of the upper end of the stirring shaft 20. A slag collection box 28 is installed at the lower end of the slag discharge mechanism 22. A negative pressure pump 24 is provided at the upper end of the slag discharge mechanism 22. A porous ceramic suction nozzle 30 is installed at the bottom inside the slag collection box 28. Two pulse ultrasonic sensors 34 are symmetrically and obliquely installed at the middle position of the inner wall of the furnace 2.

[0031] These structures work together to detect slag particles in the molten metal using a pulsed ultrasonic sensor 34, promote slag particle aggregation using a traveling wave electromagnetic field generator 35, and remove slag particles in collaboration with a slag discharge mechanism 22, a slag collection box 28, a negative pressure pump 24, and a porous ceramic suction nozzle 30. This effectively improves the purity of the molten metal, reduces the impact of impurities on the quality of the power converter components, and ensures stable component performance. At the same time, the stirring shaft 20 helps to mix the molten metal evenly, laying the foundation for high-quality die casting.

[0032] Please see Figure 1 A pressure injection mechanism 3 is provided on one side below the furnace 2. A fixed mold 4 is provided at the upper end of the die casting device 1. A movable mold 5 is slidably installed on one side of the fixed mold 4. The movable mold 5 is located on one side of the pressure injection mechanism 3. A robotic arm slide rail 7 is installed on one side of the die casting device 1. A robotic arm 6 is slidably installed above the robotic arm slide rail 7. A Bernoulli suction cup 8 is installed on one side of the upper end of the robotic arm 6.

[0033] The injection mechanism 3 injects molten metal into the cavity composed of the fixed mold 4 and the moving mold 5 to complete the molding. The robotic arm 6 moves along the robotic arm slide rail 7 and uses the Bernoulli suction cup 8 to accurately grasp and transfer the casting, reducing manual intervention, avoiding damage to the casting during the transfer process, improving the continuity and efficiency of production, and ensuring that the molded parts can smoothly enter the next stage.

[0034] Please see Figure 2 A vision inspection table 9 is installed on one side of the robotic arm 6. A material support screw 10 is installed at the lower middle position inside the vision inspection table 9. A material support plate 11 is installed above the material support screw 10. A detection first screw 14 is installed on the upper inner wall inside the vision inspection table 9. A detection second screw 15 is installed below the detection first screw 14. A mounting base 16 is installed below the detection second screw 15. A camera 17 and a 3D contour sensor 18 are installed below the mounting base 16.

[0035] The material support screw 10 drives the material support plate 11 to adjust the position of the casting. The detection first screw 14 and the detection second screw 15 work together to drive the mounting base 16 to move, so that the camera 17 and the 3D contour sensor 18 can perform all-round inspection of the casting, promptly detect surface and internal defects of the casting, avoid defective products from being transferred, provide a basis for adjusting production parameters, and help improve product quality.

[0036] Please see Figure 3-4 A stirring motor 19 is installed at the upper center of the furnace 2. The output end of the stirring motor 19 is connected to the stirring shaft 20. A stirring paddle 21 is fixedly fitted onto the outside of the stirring shaft 20. A slag discharge mechanism fixing frame 23 is provided at the upper end of the slag discharge mechanism 22. One end of the slag discharge mechanism fixing frame 23 is fixedly fitted onto the outside of the upper end of the stirring shaft 20. Slag discharge mechanism electric telescopic cylinders 27 are symmetrically installed below the slag discharge mechanism fixing frame 23. The upper end of the slag discharge mechanism electric telescopic cylinder 27 is fixedly connected to the slag discharge mechanism fixing frame 23, and the lower end of the slag discharge mechanism electric telescopic cylinder 27 is fixedly connected to the upper end of the slag collection box 28. The air inlet of the negative pressure pump 24 is sealed to the porous ceramic suction nozzle 30 through a suction pipe 26, and the air outlet of the negative pressure pump 24 is sealed to the negative pressure tank through a connecting pipe 25. A slag collection nozzle 29 is provided at the front end of the slag collection box 28, and a slag collection groove 31 is opened inside the slag collection box 28. The height of the lower end of the slag collection tank 31, away from the slag collection nozzle 29, gradually decreases, and the porous ceramic suction nozzle 30 is located at the lower end inside the slag collection tank 31.

[0037] The stirring motor 19 drives the stirring shaft 20 and the stirring paddle 21 to rotate, making the composition of the molten metal uniform; the slag discharge mechanism fixing frame 23 fixes the slag discharge mechanism 22, the electric telescopic cylinder 27 of the slag discharge mechanism adjusts the position of the slag collection box 28, the slag collection nozzle 29 and the slag collection trough 31 collect slag particles, and the negative pressure pump 24 sucks in the slag particles for processing through the suction pipe 26 and the porous ceramic suction nozzle 30, thereby improving the slag discharge efficiency, reducing the waste of molten metal, and ensuring the quality of molten metal.

[0038] Please see Figure 5 The die-casting control system 32 is equipped with a control unit 33. The camera 17, 3D contour sensor 18 and pulse ultrasonic sensor 34 are electrically connected to the control unit 33. The control unit 33 is electrically connected to the robotic arm 6, Bernoulli suction cup 8, negative pressure pump 24 and slag discharge mechanism electric telescopic cylinder 27.

[0039] The control unit 33 receives detection data from the camera 17, the 3D contour sensor 18, and the pulse ultrasonic sensor 34, and controls the robotic arm 6, the Bernoulli suction cup 8, the negative pressure pump 24, and the electric telescopic cylinder 27 of the slag discharge mechanism to work together to achieve intelligent control of each link, reduce human operation errors, improve the stability and consistency of the production process, and ensure the efficient operation of the equipment.

[0040] A die-casting method for a power converter die-casting apparatus includes the following steps:

[0041] Step 1: Furnace 2 melts raw materials such as aluminum alloy or magnesium alloy. During this process, stirring motor 19 drives stirring shaft 20 and stirring paddle 21 to rotate, so that the composition of the molten metal is uniformly fused. Pulse ultrasonic sensor 34 is immersed in the solution and emits 5-10MHz high-frequency pulse ultrasonic waves. When the sound waves encounter slag particles, they generate scattered echoes. By analyzing the echo intensity and delay, a three-dimensional slag particle distribution map of the melt is constructed in real time.

[0042] Step 2: When slag particles are detected in the solution, the pulsed ultrasonic sensor 34 sends a signal to the control unit 33. The control unit 33 controls the traveling wave electromagnetic field generator 35 to turn on, and the traveling wave electromagnetic field generator 35 generates a switching frequency current. The three-phase current synthesizes a directional moving magnetic field. The moving magnetic field interacts with the induced eddy current to generate a directional electromagnetic force. The traveling wave magnetic field penetrates the aluminum liquid and induces closed eddy currents in the melt. The eddy currents interact with the magnetic field. Due to the vertical movement of the magnetic field, it oscillates periodically in the vertical direction. Under the vertical oscillation, the slag particles move relative to each other due to density difference and Stokes resistance. The slag particles have a large inertia and lag behind the movement of the aluminum liquid. The slag particles continue to float and accumulate to form a high-concentration slag layer. At this time, the control unit 33 controls the slag discharge mechanism 22 to perform slag discharge operation. The control unit 33 controls the electric telescopic cylinder 27 of the slag discharge mechanism to extend, so that the lower end face of the slag collection nozzle 29 of the slag collection box 28 is 2 to 3 mm lower than the solution surface, thereby collecting the slag particles on the solution surface. The slag particles flow into the slag collection tank 31 with a small amount of melt. The negative pressure pump 24 is turned on. The negative pressure pump 24 generates negative pressure and sucks the melt containing slag particles into the negative pressure tank through the suction pipe 26 and the connecting pipe 25 in sequence.

[0043] Step 3: The purified molten metal is precisely delivered to the injection chamber of the injection mechanism 3 by the high-precision quantitative molten metal supply system, ensuring that the supply amount matches the casting requirements each time. Then, the injection mechanism 3 adopts a vacuum-assisted multi-stage injection filling system to inject the molten metal into the mold cavity composed of the fixed mold 4 and the moving mold 5 at a preset speed and pressure. The dynamically adjustable mold exhaust system dynamically adjusts the exhaust baffle according to the air pressure in the cavity to efficiently exhaust the gas. The intelligent mold system with zoned temperature control accurately controls the temperature of different areas of the mold to ensure that the molten metal cools and forms quickly.

[0044] Step 4: After molding, the moving mold 5 opens, and the robotic arm 6 moves along the robotic arm slide rail 7. The Bernoulli suction cup 8 picks up the casting and transfers it to the material support plate 11 of the vision inspection table 9. The material support plate 11 is moved into the vision inspection table 9 by the material support screw 10. The electric telescopic cylinder 12 of the vision inspection table pushes the sliding plate 13 down, thereby driving the camera 17 and 3D contour sensor 18 to approach the casting. The detection first screw 14 and detection second screw 15 move in coordination, driving the mounting base 16 to move back and forth and left and right, allowing the camera 17 and 3D contour sensor 18 on the mounting base 16 to perform a comprehensive inspection of the casting. The inspection data is fed back to the control unit 33 of the die-casting control system 32 in real time. If it is unqualified, the control unit 33 automatically adjusts the next injection parameters according to the unqualified parameters, adjusting the pressure replenishment time, mold temperature and cooling time to reduce the outflow of defective products.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A power converter die-casting apparatus, comprising a die-casting device (1) and a die-casting control system (32), characterized in that: A furnace (2) is provided on the upper end of one side of the die-casting device (1). A traveling wave electromagnetic field generator (35) is fixedly installed below the furnace (2). A stirring shaft (20) is rotatably installed inside the furnace (2). A slag discharge mechanism (22) is fixedly fitted on the outside of the upper end of the stirring shaft (20). A slag collection box (28) is installed at the lower end of the slag discharge mechanism (22). A negative pressure pump (24) is provided at the upper end of the slag discharge mechanism (22). A multi-hole ceramic suction nozzle (30) is installed at the bottom inside the slag collection box (28). Two pulse ultrasonic sensors (34) are symmetrically and obliquely installed at the middle position of the inner wall of the furnace (2).

2. The power converter die-casting device according to claim 1, characterized in that: An injection mechanism (3) is provided on one side below the furnace (2), and a fixed mold (4) is provided at the upper end of the die casting device (1). A moving mold (5) is slidably installed on one side of the fixed mold (4), and the moving mold (5) is located on one side of the injection mechanism (3).

3. The power converter die-casting device according to claim 2, characterized in that: A robotic arm slide rail (7) is installed on one side of the die-casting device (1), and a robotic arm (6) is slidably installed above the robotic arm slide rail (7). A Bernoulli suction cup (8) is installed on one side of the upper end of the robotic arm (6).

4. The power converter die-casting device according to claim 3, characterized in that: A vision inspection table (9) is installed on one side of the robotic arm (6). A material support screw (10) is installed at the middle of the lower end inside the vision inspection table (9). A material support plate (11) is installed above the material support screw (10). A detection first screw (14) is installed on the upper inner wall inside the vision inspection table (9). A detection second screw (15) is installed below the detection first screw (14). A mounting base (16) is installed below the detection second screw (15). A camera (17) and a 3D contour sensor (18) are installed below the mounting base (16).

5. A power converter die-casting device according to claim 4, characterized in that: A stirring motor (19) is installed at the upper middle position of the furnace (2). The output end of the stirring motor (19) is connected to the stirring shaft (20) for transmission. A stirring paddle (21) is fixedly fitted on the outside of the stirring shaft (20).

6. A power converter die-casting apparatus according to claim 5, characterized in that: The upper end of the slag discharge mechanism (22) is provided with a slag discharge mechanism fixing frame (23). One end of the slag discharge mechanism fixing frame (23) is fixedly fitted onto the outside of the upper end of the stirring shaft (20). The lower end of the slag discharge mechanism fixing frame (23) is symmetrically installed with electric telescopic cylinders (27). The upper end of the electric telescopic cylinder (27) is fixedly connected to the slag discharge mechanism fixing frame (23), and the lower end of the electric telescopic cylinder (27) is fixedly connected to the upper end of the slag collection box (28).

7. A power converter die-casting apparatus according to claim 6, characterized in that: The air inlet of the negative pressure pump (24) is sealed to the porous ceramic nozzle (30) through a suction pipe (26), and the air outlet of the negative pressure pump (24) is sealed to the negative pressure tank through a connecting pipe (25).

8. A power converter die-casting apparatus according to claim 7, characterized in that: The slag collection box (28) is provided with a slag collection nozzle (29) at its front end, and a slag collection groove (31) is provided inside the slag collection box (28). The height of the lower end of the slag collection groove (31) away from the slag collection nozzle (29) gradually decreases, and the porous ceramic suction nozzle (30) is located at the lower end inside the slag collection groove (31).

9. A power converter die-casting device according to claim 8, characterized in that: The die-casting control system (32) is equipped with a control unit (33). The camera (17), 3D contour sensor (18) and pulse ultrasonic sensor (34) are electrically connected to the control unit (33). The control unit (33) is electrically connected to the robotic arm (6), Bernoulli suction cup (8), negative pressure pump (24) and slag discharge mechanism electric telescopic cylinder (27).

10. A die-casting method based on the power converter die-casting apparatus according to claim 9, characterized in that, Includes the following steps: Step 1: The furnace (2) melts raw materials such as aluminum alloy or magnesium alloy. During this process, the stirring motor (19) drives the stirring shaft (20) and stirring paddle (21) to rotate, so that the metal liquid components are evenly fused. The pulse ultrasonic sensor (34) is immersed in the solution and emits 5-10MHz high-frequency pulse ultrasonic waves. When the sound waves encounter slag particles, they generate scattered echoes. By analyzing the echo intensity and delay, a three-dimensional slag particle distribution map of the melt is constructed in real time. Step 2: When slag particles are detected in the solution, the pulse ultrasonic sensor (34) sends a signal to the control unit (33), and the control unit (33) controls the traveling wave electromagnetic field generator (35) to turn on, and the traveling wave electromagnetic field generator (35) generates a switching frequency current. The three-phase current synthesizes a directional moving magnetic field. The moving magnetic field interacts with the induced eddy current to generate a directional electromagnetic force. The traveling wave magnetic field penetrates the aluminum liquid and induces closed eddy currents in the melt. The eddy currents interact with the magnetic field. Because the magnetic field moves vertically, it oscillates periodically in the vertical direction. Under the vertical oscillation, the slag particles move relative to each other due to the density difference and Stokes resistance. The slag particles have a large inertia and lag behind the movement of the aluminum liquid. The slag particles continue to float and accumulate to form a high-concentration slag layer. At this time, the control unit (33) controls the slag discharge mechanism (22) to perform slag discharge operation. The control unit (33) controls the electric telescopic cylinder (27) of the slag discharge mechanism to extend so that the lower end face of the slag collection nozzle (29) of the slag collection box (28) is 2 to 3 mm lower than the solution surface, thereby collecting the slag particles on the solution surface. The slag particles flow into the slag collection tank (31) with a small amount of melt. The negative pressure pump (24) is turned on. The negative pressure pump (24) generates negative pressure and sucks the melt containing slag particles into the negative pressure tank through the suction pipe (26) and the connecting pipe (25) in sequence. Step 3: The purified molten metal is precisely delivered to the injection chamber of the injection mechanism (3) by the high-precision quantitative molten metal supply system to ensure that the supply amount matches the casting requirements each time. Then, the injection mechanism (3) adopts a vacuum-assisted multi-stage injection filling system to inject the molten metal into the mold cavity composed of the fixed mold (4) and the moving mold (5) at a preset speed and pressure. The dynamically adjustable mold exhaust system dynamically adjusts the exhaust baffle according to the air pressure in the cavity to efficiently exhaust the gas. The intelligent mold system with zoned temperature control accurately controls the temperature of different areas of the mold to ensure that the molten metal cools and forms quickly. Step 4: After molding, the moving mold (5) opens, and the robotic arm (6) moves along the robotic arm slide rail (7). The Bernoulli suction cup (8) picks up the casting and transfers it to the top of the support plate (11) of the vision inspection table (9). The support plate (11) is moved into the vision inspection table (9) by the support screw (10). The extended electric telescopic cylinder (12) of the vision inspection table pushes the sliding plate (13) downwards, thereby bringing the camera (17) and 3D contour sensor (18) closer to the casting to detect the first trace. The lever (14) and the detection second lead screw (15) move together, driving the mounting base (16) to move back and forth and left and right, so that the camera (17) and 3D contour sensor (18) on the mounting base (16) can perform a comprehensive inspection of the casting. The inspection data is fed back to the control unit (33) of the die casting control system (32) in real time. If it is unqualified, the control unit (33) automatically adjusts the next injection parameters according to the unqualified parameters, adjusts the pressure replenishment time, mold temperature and cooling time, and reduces the outflow of defective products.

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