Electromagnetic pulse warm forming device for aluminum-magnesium alloy thin-walled precision stamping part

Abstract

The application relates to the technical field of metal plastic working, in particular to an electromagnetic pulse warm forming device for aluminum-magnesium alloy thin-wall precision stamping parts, which comprises an electromagnetic stamping forming device composed of an upper die, a lower die and an electromagnetic coil arranged in the upper die, a workpiece cavity is arranged in the upper die and the lower die, a hydraulic telescopic rod is arranged between the upper die and the lower die, a positioning rod is fixed to the bottom side of the upper die, and a positioning groove matched with the positioning rod is arranged in the lower die. The electromagnetic pulse warm forming device for aluminum-magnesium alloy thin-wall precision stamping parts is matched with the lubricating action and the die closing process, so that the lubricant can be pumped into the workpiece cavity at the moment after the die closing and before the forming, the volatilization or dripping waste of the lubricant caused by early lubrication is avoided, and the lubricant is directly guided to the workpiece cavity of the lower die through the channel in the lifting rod. The lubricant can be directly and uniformly delivered to the forming area, instead of being sprayed at will, so that the lubricating efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of metal plastic processing technology, and in particular to an electromagnetic pulse thermoforming device for thin-walled precision stamping parts of aluminum-magnesium alloy. Background Technology

[0002] Aluminum-magnesium alloys are widely used in aerospace, automotive lightweighting, and 3C electronic products due to their low density, high specific strength, and good corrosion resistance. However, aluminum-magnesium alloys have relatively low forming limits at room temperature, especially for thin-walled, complex-structured precision stamped parts. Traditional stamping processes are prone to cracking, large springback, and difficulty in controlling dimensional accuracy. To overcome these challenges, thermoforming technology is often used to improve the plasticity of the material and reduce yield stress through heating. Meanwhile, electromagnetic pulse forming, as a high-energy-rate forming method, utilizes pulsed magnetic field force to drive high-speed deformation of the blank, which can significantly improve the forming limit of the material and suppress springback.

[0003] Existing forming devices that combine electromagnetic pulses and thermal effects, such as sheet metal thermoforming devices based on induced high-frequency electromagnetic fields, while achieving a combination of non-contact heating and forming, still have some shortcomings in practical applications. Firstly, regarding the precision fit of the molds, the mold-closing guide structure of the upper and lower molds is prone to wear under long-term high-temperature and high-frequency impact conditions, leading to decreased positioning accuracy and affecting the uniformity of wall thickness and dimensional tolerances of the stamped parts. Secondly, during the forming process, to reduce friction, improve the surface quality of parts, and extend mold life, lubrication of the workpiece cavity of the mold is necessary. However, traditional lubrication methods are mostly manual spraying or timed and quantitative automatic spraying, which not only makes it difficult to accurately control the timing of lubrication, such as performing it instantaneously after mold closing and before forming, but also results in lubricant dripping or splashing, causing waste and environmental pollution. Finally, the existing devices have low structural integration, failing to cleverly link the mold-closing action with the auxiliary lubrication function, increasing the complexity and cost of the control system. Therefore, an electromagnetic pulse thermoforming device for thin-walled precision stamped parts of aluminum-magnesium alloys is proposed to solve the problems mentioned above. Summary of the Invention

[0004] In order to improve the production efficiency, forming quality and yield of aluminum-magnesium alloy thin-walled precision stamping parts, this application provides an electromagnetic pulse thermoforming device for aluminum-magnesium alloy thin-walled precision stamping parts. It has the advantages of long-term high-precision mold closing guidance, and at the same time realizes the synchronous and efficient lubrication function with mold closing action, thus solving the problems mentioned above.

[0005] This application provides an electromagnetic pulse thermoforming device for thin-walled precision stamping parts of aluminum-magnesium alloy, which adopts the following technical solution: An electromagnetic pulse thermoforming device for thin-walled precision stamping parts of aluminum-magnesium alloy includes an upper die, a lower die, and an electromagnetic stamping forming equipment consisting of an electromagnetic coil disposed inside the upper die. Both the upper die and the lower die have workpiece cavities inside. A hydraulic telescopic rod is disposed between the upper die and the lower die. A positioning rod is fixed on the bottom side of the upper die, and a positioning groove adapted to the positioning rod is disposed inside the lower die. The positioning groove is provided with an abutting component, and the bottom side of the lower mold is provided with an infusion mechanism and a connecting plate that cooperate with the abutting component. The upper mold and the lower mold are driven to close by a hydraulic telescopic rod. At this time, the positioning rod is inserted into the positioning groove to achieve positioning. The infusion mechanism includes a lifting assembly, a guiding assembly, and a pumping assembly. The lifting assembly is connected to the abutting assembly via a connecting plate and achieves synchronous lifting. During the lifting process, the guiding assembly drives the pumping assembly to lubricate the workpiece cavity of the lower mold. The lifting assembly includes a circular block and a lifting rod fixed to the bottom side of the circular block and penetrating the interior of the lower mold. The lifting rod has a channel inside that communicates with the pumping assembly, and a guide groove inside that abuts and cooperates with the guide assembly.

[0006] Optionally: the electromagnetic coil is arranged around the outside of the workpiece cavity of the upper mold, and a material gripping device is arranged inside the upper mold. The material gripping device includes a suction plate located on the workpiece cavity inside the upper mold, and a vacuum tube extending to the outside of the upper mold is fixed on one side of the suction plate.

[0007] Optionally: The lower mold has an internal receiving groove for use with the lifting assembly, the hydraulic telescopic rod is fixed to the outer wall of the lower mold, and its output end is fixed to the outer wall of the upper mold.

[0008] Optionally, the abutment assembly includes a receiving platform slidably disposed inside the positioning groove, a guide rod extending to the outside of the lower mold is fixed to the bottom side of the receiving platform, and a return spring fixed to the bottom side of the lower mold is provided on the outer surface of the guide rod.

[0009] Optionally: the bottom ends of the guide rod and the lifting rod are fixed to both sides of the connecting plate, and the lower mold is provided with a positioning component for use in conjunction with the lifting of the guide rod, wherein the positioning component is used to fix the pumping component.

[0010] Optional: The positioning component includes a hollow tube with a Z-shaped shape, one end of which is connected to the positioning groove, and the other end has a sliding abutment block. A return spring is fixed between the abutment block and the end of the tube. The receiving platform is positioned higher than the end of the through pipe. By sliding the receiving platform inside the positioning groove, the gas inside the through pipe is pressurized and delivered, and the sliding contact block abuts against the pumping component.

[0011] Optionally, the guide assembly includes a mounting base fixed to the bottom side of the lower mold. A guide rod is detachably installed inside the mounting base. The guide rod abuts against the guide groove, wherein the guide groove is composed of a straight groove and a spiral groove. Through the abutting cooperation between the guide rod and the guide groove, the lifting rod rotates during lifting.

[0012] Optionally, the guide assembly further includes a rotating sleeve rotatably mounted on the bottom side of the mounting base. Both the rotating sleeve and the mounting base are hollow, and the lifting rod passes through the interior of the mounting base and the rotating sleeve. The rotating sleeve is splinedly connected to the lifting rod, and a cam for driving the pumping assembly is fixed on the outer surface of the rotating sleeve.

[0013] Optional: The pumping assembly includes a hollow cylinder with a piston extending outwardly slidably disposed inside the cylinder. A ball bearing that abuts against a cam is rotatably mounted at the end of the piston, and a return spring fixed to one side of the cylinder is mounted on the outer surface of the piston. Two valve tubes are mounted on the outer wall of the cylinder, and an infusion tube is installed between the end of one of the valve tubes and the bottom end of the lifting rod. The bottom side of the lower mold is fixed with a guide rail, and the cylinder is slidably connected to the guide rail.

[0014] Optionally, the infusion mechanism further includes an air supply component disposed inside the lower mold. The air supply component includes a push block. The lower mold has a through groove communicating with the positioning groove. The push block is slidably disposed in the through groove, and one side of it is fixed to the outer wall of the lifting rod. The lower mold also has a valve groove communicating with the through groove and the receiving groove respectively.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. In this invention, the lubrication action is coordinated with the mold closing process, ensuring that the lubricant is pumped into the workpiece cavity precisely after mold closing and before forming, avoiding premature lubrication that would lead to evaporation or dripping waste. The lubricant is then directly guided to the workpiece cavity of the lower mold through a channel inside the lifting rod. This allows the lubricant to be delivered directly and evenly to the area to be formed, rather than being sprayed randomly, thus improving lubrication efficiency.

[0016] 2. In this invention, the workpiece cavity is fully lubricated before forming, which significantly reduces the friction between the aluminum-magnesium alloy billet and the mold surface during high-speed deformation. This facilitates material flow, thereby reducing localized tearing and surface scratches caused by friction, and improving the surface quality and yield of stamped parts.

[0017] 3. The present invention, through the setting of the receiving platform and the return spring, provides a buffer when the positioning rod is inserted into the positioning groove, reducing the impact and wear on the mold guide structure during high-speed mold closing, and maintaining the mold closing accuracy for a long time. At the same time, during the buffering process, liquid is delivered and air is extracted from the workpiece cavity. For thermoforming, the lower mold is usually at a high temperature. The air extraction action can extract the hot air in the workpiece cavity, which helps to slightly reduce the cavity temperature or remove the oxidizing atmosphere generated by heating before the start of the next cycle, thus improving the working environment.

[0018] 4. In this invention, the movement of the push block in the through groove acts as a pump, not only drawing air from the workpiece cavity when the mold is closed, but more importantly, when the lifting rod moves rapidly, the connection between the valve groove and the receiving groove balances the air pressure changes inside the receiving groove caused by the lifting of the circular block, preventing movement jamming caused by air resistance or air cushion effect, making the movement of the lifting component more sensitive and smooth. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of the entire application; Figure 2 This is a cross-sectional view of this application; Figure 3 This is a cross-sectional view of the upper mold of this application; Figure 4 This is a cross-sectional view of the lower mold of this application; Figure 5 This is a cross-sectional view of the infusion mechanism and the contact component of this application; Figure 6 This is a partial structural diagram of the infusion mechanism of this application; Figure 7 This is a cross-sectional view of the pumping assembly of this application; Figure 8 This application Figure 5 A magnified structural diagram of structure A is shown.

[0020] Explanation of reference numerals in the attached figures: 1. Electromagnetic stamping forming equipment; 11. Upper die; 12. Lower die; 121. Receiving groove; 13. Workpiece cavity; 14. Hydraulic telescopic rod; 15. Positioning rod; 16. Positioning groove; 17. Electromagnetic coil; 2. Material gripping device; 21. Suction plate; 22. Vacuum tube; 3. Abutment assembly; 31. Receiving platform; 32. Guide rod; 33. Return spring 1; 4. Liquid delivery mechanism; 41. Lifting assembly; 411. Circular block; 412. Lifting rod; 413. Channel; 42. Guide 421. Guide assembly; 422. Mounting base; 423. Guide rod; 424. Rotary sleeve; 425. Cam; 43. Pumping assembly; 431. Cylinder; 432. Piston; 433. Ball bearing; 434. Second return spring; 44. Positioning assembly; 441. Through pipe; 442. Abutment block; 443. Third return spring; 45. Guide rail; 46. Infusion pipe; 47. Gas supply component; 471. Push block; 472. Through groove; 473. Valve groove; 48. Guide groove; 5. Connecting plate. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0022] An electromagnetic pulse thermoforming apparatus for thin-walled precision stamped parts of aluminum-magnesium alloys; please refer to [link to relevant documentation]. Figures 1 to 8 The system includes an electromagnetic stamping forming apparatus 1, which serves as the base. The electromagnetic stamping forming apparatus 1 includes an upper die 11, a lower die 12, and an electromagnetic coil 17 disposed inside the upper die 11. Specifically, the electromagnetic coil 17 is arranged around the outside of the workpiece cavity 13 of the upper die 11 to generate a pulsed magnetic field concentrated in the workpiece cavity 13 when energized. Both the upper die 11 and the lower die 12 have workpiece cavities 13 corresponding to the outline of the workpiece to be processed, and the workpiece cavities 13 are equipped with heating functions. A hydraulic telescopic rod 14 is disposed between the upper die 11 and the lower die 12. The hydraulic telescopic rod 14 is fixed to the outer wall of the lower die 12, and its output end is fixed to the outer wall of the upper die 11, used to drive the upper die 11 to move up and down relative to the lower die 12, realizing the opening and closing of the die.

[0023] It is worth mentioning that the instantaneous strong magnetic field generated after energizing induces eddy currents inside the aluminum-magnesium alloy workpiece and rapidly heats it, keeping the workpiece in a warm state. This significantly reduces the deformation resistance of the aluminum-magnesium alloy and improves the material's plasticity. Combined with electromagnetic pulse force, high-speed forming is achieved, making it suitable for processing ultra-thin-walled, complex curved, and high-precision aluminum-magnesium alloy stamping parts. The forming quality is high, while effectively reducing the springback of the workpiece after forming and reducing subsequent correction processes.

[0024] To achieve automated production, a material gripping device 2 is installed inside the upper mold 11. The material gripping device 2 includes a suction plate 21 located on the workpiece cavity 13 inside the upper mold 11. A vacuum tube 22 extending to the outside of the upper mold 11 is fixed to one side of the suction plate 21. This vacuum tube is used to hold the formed workpiece during mold opening or loading, facilitating automated unloading. It should be noted that a high-temperature resistant buffer pad (not shown in the figure) is provided on the surface of the suction plate 21 of the material gripping device 2. This buffer pad can prevent the suction plate 21 from directly and rigidly contacting the high-temperature workpiece, preventing scratches on the workpiece surface, and improving the sealing of the suction.

[0025] To achieve high-precision mold closing guidance, a positioning rod 15 protrudes downward from the bottom side of the upper mold 11, and a positioning groove 16 is opened on the top of the lower mold 12, which precisely matches the position and size of the positioning rod 15. During the mold closing process, the positioning rod 15 is inserted into the positioning groove 16 to ensure precise alignment of the upper and lower molds 12.

[0026] A retaining assembly 3 is provided within the positioning groove 16. The retaining assembly 3 includes a receiving platform 31 slidably disposed within the positioning groove 16. A guide rod 32 extending to the outside of the lower mold 12 is fixed to the bottom side of the receiving platform 31. A return spring 33, fixed to the bottom side of the lower mold 12, is provided on the outer surface of the guide rod 32. When the positioning rod 15 is inserted into the positioning groove 16 and presses down on the receiving platform 31, the return spring 33 is compressed; when the mold opening positioning rod 15 is pulled out, the return spring 33 drives the receiving platform 31 to return to its original position. In addition, the arrangement of the receiving platform 31 and the return spring 33 provides a buffer when the positioning rod 15 is inserted into the positioning groove 16, reducing the impact and wear on the mold guide structure during high-speed mold closing, and maintaining mold closing accuracy over a long period of time.

[0027] The bottom side of the lower mold 12 is provided with an infusion mechanism 4 and a connecting plate 5. The bottom end of the guide rod 32 is fixedly connected to one side of the connecting plate 5. The infusion mechanism 4 includes a lifting assembly 41, a guiding assembly 42, and a pumping assembly 43. The lifting assembly 41 is connected to the abutment assembly 3 through the connecting plate 5 and achieves synchronous lifting.

[0028] Specifically, the lifting assembly 41 includes a circular block 411 and a lifting rod 412 fixed to the bottom side of the circular block 411 and penetrating the interior of the lower mold 12. The lower mold 12 has a receiving groove 121 inside that cooperates with the circular block 411, providing space for the circular block 411 to rise. The bottom end of the lifting rod 412 is fixedly connected to the other side of the connecting plate 5. The lifting rod 412 has a channel 413 inside that communicates with the pumping assembly 43. The upper port of the channel 413 communicates with the bottom surface of the circular block 411. The circular block 411 is hollow inside and has a liquid inlet on its side for guiding lubricant to the top of the circular block 411 and then flowing into the workpiece cavity 13. The lifting rod 412 has a guide groove 48 inside that abuts against the guide assembly 42. The guide groove 48 is composed of a combination of a straight groove and a spiral groove. Through the abutting cooperation between the guide assembly 42 and the guide groove 48, the lifting rod 412 achieves a composite motion of first linear movement and then rotation during lifting. It should be noted that the spiral groove portion of the guide groove 48 has a variable lead angle. By changing the lead angle of the spiral groove, the rotational speed of the lifting rod 412 at different stages of descent can be controlled, thereby changing the frequency and speed of the cam 424 driving the pumping assembly 43, achieving precise adjustment of the lubricant pumping flow rate curve to adapt to the special requirements of different workpieces for lubrication amount and lubrication timing.

[0029] The guide assembly 42 includes a mounting base 421 fixed to the bottom side of the lower mold 12. A guide rod 422 is detachably mounted inside the mounting base 421, and the guide rod 422 abuts against the guide groove 48. The guide assembly 42 also includes a rotating sleeve 423 rotatably mounted to the bottom side of the mounting base 421 via a bearing. Both the rotating sleeve 423 and the mounting base 421 are hollow, and a lifting rod 412 passes through the interior of the mounting base 421 and the rotating sleeve 423. The rotating sleeve 423 and the lifting rod 412 are connected by a spline, allowing the lifting rod 412 to slide up and down relative to the rotating sleeve 423 and also drive the rotating sleeve 423 to rotate synchronously. The outer surface of the rotating sleeve 423 is fixed with a cam 424 for driving the pumping assembly 43. It should be noted that the side of the cam 424 is arranged in an annular wave shape, and by replacing the cam 424 with different profiles, the reciprocating stroke of the piston 432 can be changed, thereby adjusting the volume of lubricant pumped in a single pump. It can be applied to workpieces of different sizes and shapes, significantly improving the versatility and flexibility of the equipment.

[0030] The pumping assembly 43 includes a hollow cylinder 431. A guide rail 45 is fixed to the bottom side of the lower mold 12, and the cylinder 431 is slidably connected to the guide rail 45 to ensure that the pumping assembly 43 can smoothly approach or move away from the cam 424. A piston 432 is slidably disposed inside the cylinder 431 and extends outward therefrom. A ball bearing 433 is rotatably mounted at the end of the piston 432 to abut against the cam 424 to reduce friction. A return spring 434 is fixed to one side of the cylinder 431 and mounted on the outer surface of the piston 432. Two one-way valve pipes are installed on the outer wall of the cylinder 431. One is an inlet valve pipe connected to an external lubricant storage tank; the other is an outlet valve pipe, which is a check valve. A flexible infusion pipe 46 is installed between its end and the bottom end of the lifting rod 412, communicating with the channel 413 of the lifting rod 412.

[0031] To achieve precise positioning and unlocking of the pumping assembly 43, a positioning assembly 44 is installed inside the lower mold 12 to cooperate with the lifting and lowering of the guide rod 32. The positioning assembly 44 includes a hollow tube 441 with a Z-shaped shape. One end of the tube 441 is connected to the side wall of the positioning groove 16, and the other end has a sliding abutment block 442. A return spring 443 is fixed between the abutment block 442 and the inner wall of the end of the tube 441. The initial position of the receiving platform 31 in the positioning groove 16 is higher than the end opening of the tube 441. By sliding the receiving platform 31 inside the positioning groove 16, the tube 441 is pressurized and supplied with air, allowing the abutment block 442 to slide and abut against the end of the cylinder 431 of the pumping assembly 43, thereby locking the pumping assembly 43 in the pre-working position at the initial stage of mold closing.

[0032] To optimize the airflow and pressure balance inside the lower mold 12 and assist in workpiece unloading, the liquid delivery mechanism 4 also includes an air delivery component 47 disposed inside the lower mold 12. The air delivery component 47 includes a pusher block 471. A through groove 472 communicating with the positioning groove 16 is provided inside the lower mold 12. The pusher block 471 is slidably disposed in the through groove 472, and one side of it is fixed to the outer wall of the lifting rod 412. A valve groove 473 communicating with the through groove 472 and the receiving groove 121 is also provided inside the lower mold 12. A one-way valve (not shown in the figure) is provided at the connection between the through groove 472 and the valve groove 473, and at the connection between the valve groove 473 and the receiving groove 121. When the lifting rod 412 moves downward, the pushing block 471 slides downward in the through groove 472, and draws air from the workpiece cavity 13 through the one-way valve in the valve groove 473, thereby assisting in the positioning of the blank and the discharge of hot air. When the lifting rod 412 moves upward, the pushing block 471 slides upward, and delivers gas to the workpiece cavity 13 through the one-way valve in the valve groove 473, thereby assisting in the ejection of the formed workpiece.

[0033] Combined with appendix Figures 1-8 The working principle of the above embodiments is as follows: Initially, the upper mold 11 is in a high position, the hydraulic telescopic rod 14 is in an extended state, the receiving platform 31 in the positioning groove 16 is in the highest position under the action of the return spring 33, and the lifting assembly 41 is also in the highest position through the connecting plate 5. At this time, the relative position of the guide groove 48 on the lifting rod 412 and the guide rod 422 makes the lifting rod 412 in a specific angle. The protruding part of the cam 424 is away from the ball 433 of the pumping assembly 43. When the positioning assembly 44 has not yet worked, the cylinder 431 can slide freely along the guide rail 45, but usually stays in a position close to the cam 424 due to gravity or slight friction. Then, the mold is closed and pre-lubrication is initiated. By activating the hydraulic telescopic rod 14, the upper mold 11 is pushed downward. First, the positioning rod 15 is inserted into the positioning groove 16 and presses against the receiving platform 31. The receiving platform 31 begins to move downward. Through the guide rod 32 and the connecting plate 5, the lifting rod 412 moves downward synchronously. The lifting rod 412 continues to move downward. Since the guide rod 422 is stuck in the straight groove of the guide groove 48, the lifting rod 412 initially only moves downward in a straight line. When the guide rod 422 moves to the spiral groove section, the lifting rod 412 is forced to start rotating. The rotational motion is transmitted to the rotating sleeve 423 through the spline, which drives the cam 424 to rotate synchronously. The rotating cam 424 pushes the ball 433 that is opposed to it, thereby pushing the piston 432 to compress into the cylinder 431. After the cam 424 protrusion rotates, the return spring 434 pushes the piston 432 back. This process repeats, and the piston 432 reciprocates inside the cylinder 431, drawing the lubricant from the inlet pipe and pumping it out from the outlet pipe. The lubricant is then transported through the delivery pipe 46 and the channel 413 of the lifting rod 412 to the top of the circular block 411 and evenly sprayed into the workpiece cavity 13 of the lower mold 12. As the lifting rod 412 continues to descend and rotate, the pumping assembly 43 completes several pumping cycles to ensure that the workpiece cavity 13 is adequately lubricated. When the lifting rod 412 reaches its lowest point, mold closing is complete. At this time, the upper mold 11 and the lower mold 12 are tightly fitted together. A powerful pulsed current is instantaneously applied to the electromagnetic coil 17, generating a pulsed magnetic field that drives the blank to be formed at extremely high speed, fitting into the mold cavity. During this process, since the mold closing action has been completed and the lubricant has been evenly distributed, friction during forming can be effectively reduced, improving material flowability and surface quality.

[0034] In the initial stage of mold closing, the receiving platform 31 moves down a short distance, its side wall is temporarily closed and the air in the through pipe 441 is compressed, triggering the positioning component 44 to move, the abutment block 442 extends, pushes the cylinder 431 to and locks it in the working position, so that the ball 433 is aligned with the cam 424, thereby driving the pumping component 43 to work.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electromagnetic pulse thermoforming device for thin-walled precision stamped parts of aluminum-magnesium alloy, comprising an upper die (11), a lower die (12), and an electromagnetic stamping forming device (1) consisting of an electromagnetic coil (17) disposed inside the upper die (11), characterized in that: Both the upper mold (11) and the lower mold (12) have workpiece cavities (13) inside. A hydraulic telescopic rod (14) is provided between the upper mold (11) and the lower mold (12). A positioning rod (15) is fixed on the bottom side of the upper mold (11), and a positioning groove (16) that matches the positioning rod (15) is provided inside the lower mold (12). The positioning groove (16) is provided with an abutment component (3), and the bottom side of the lower mold (12) is provided with an infusion mechanism (4) and a connecting plate (5) that cooperate with the abutment component (3). The upper mold (11) and the lower mold (12) are driven to close by a hydraulic telescopic rod (14). At this time, the positioning rod (15) is inserted into the positioning groove (16) to achieve positioning. The infusion mechanism (4) includes a lifting assembly (41), a guiding assembly (42), and a pumping assembly (43). The lifting assembly (41) is connected to the abutting assembly (3) via a connecting plate (5) and achieves synchronous lifting. During the lifting process, the lifting assembly (41) uses the guiding assembly (42) to drive the pumping assembly (43) to lubricate the workpiece cavity (13) of the lower mold (12). The lifting assembly (41) includes a circular block (411) and a lifting rod (412) fixed to the bottom side of the circular block (411) and penetrating the interior of the lower mold (12). The lifting rod (412) has a channel (413) that communicates with the pumping assembly (43) and a guide groove (48) that abuts and cooperates with the guide assembly (42).

2. The electromagnetic pulse thermoforming device for thin-walled precision stamping parts of aluminum-magnesium alloy according to claim 1, characterized in that: The electromagnetic coil (17) is arranged around the outside of the workpiece cavity (13) of the upper mold (11). The upper mold (11) is provided with a material gripping device (2). The material gripping device (2) includes a suction plate (21) located on the workpiece cavity (13) inside the upper mold (11). A vacuum tube (22) extending to the outside of the upper mold (11) is fixed on one side of the suction plate (21).

3. The electromagnetic pulse thermoforming device for thin-walled precision stamping parts of aluminum-magnesium alloy according to claim 1, characterized in that: The lower mold (12) has an internal receiving groove (121) that works in conjunction with the lifting assembly (41). The hydraulic telescopic rod (14) is fixed to the outer wall of the lower mold (12), and its output end is fixed to the outer wall of the upper mold (11).

4. The electromagnetic pulse thermoforming device for thin-walled precision stamping parts of aluminum-magnesium alloy according to claim 1, characterized in that: The abutment component (3) includes a receiving platform (31) slidably disposed inside the positioning groove (16). A guide rod (32) extending to the outside of the lower mold (12) is fixed on the bottom side of the receiving platform (31). A reset spring (33) fixed to the bottom side of the lower mold (12) is provided on the outer surface of the guide rod (32).

5. The electromagnetic pulse thermoforming device for thin-walled precision stamping parts of aluminum-magnesium alloy according to claim 4, characterized in that: The bottom ends of the guide rod (32) and the lifting rod (412) are fixed to both sides of the connecting plate (5). The lower mold (12) is provided with a positioning component (44) for lifting and lowering the guide rod (32). The positioning component (44) is used to fix the pumping component (43).

6. The electromagnetic pulse thermoforming device for thin-walled precision stamping parts of aluminum-magnesium alloy according to claim 5, characterized in that: The positioning component (44) includes a hollow tube (441) with a Z-shaped shape. One end of the tube (441) is connected to the positioning groove (16), and the other end is slidably provided with an abutment block (442). A reset spring (443) is fixed between the abutment block (442) and the end of the tube (441). The receiving platform (31) is positioned higher than the end of the through pipe (441). By sliding the receiving platform (31) inside the positioning groove (16), the gas inside the through pipe (441) is pressurized and delivered, and the sliding contact block (442) abuts against the pumping component (43).

7. The electromagnetic pulse thermoforming device for thin-walled precision stamping parts of aluminum-magnesium alloy according to claim 1, characterized in that: The guide assembly (42) includes a mounting base (421) fixed to the bottom side of the lower mold (12). A guide rod (422) is detachably installed inside the mounting base (421). The guide rod (422) abuts against the guide groove (48). The guide groove (48) is composed of a straight groove and a spiral groove. The lifting rod (412) rotates during lifting by abutting against the guide rod (422) and the guide groove (48).

8. The electromagnetic pulse thermoforming device for thin-walled precision stamping parts of aluminum-magnesium alloy according to claim 7, characterized in that: The guide assembly (42) further includes a rotating sleeve (423) rotatably mounted on the bottom side of the mounting base (421). The rotating sleeve (423) and the mounting base (421) are both hollow inside, and the lifting rod (412) passes through the mounting base (421) and the rotating sleeve (423). The rotating sleeve (423) is splinedly connected to the lifting rod (412). The outer surface of the rotating sleeve (423) is fixed with a cam (424) for driving the pumping assembly (43).

9. The electromagnetic pulse thermoforming device for thin-walled precision stamping parts of aluminum-magnesium alloy according to claim 1, characterized in that: The pumping assembly (43) includes a hollow cylinder (431) with a piston (432) slidably extending outward inside the cylinder (431). The piston (432) has a ball (433) rotatably mounted at its end that abuts against a cam (424). The piston (432) has a return spring (434) fixed to one side of the cylinder (431) on its outer surface. Two valve tubes are installed on the outer wall of the cylinder (431), and an infusion tube (46) is installed between the end of one of the valve tubes and the bottom end of the lifting rod (412). The bottom side of the lower mold (12) is fixed with a guide rail (45), and the cylinder (431) is slidably connected to the guide rail (45).

10. The electromagnetic pulse thermoforming device for thin-walled precision stamping parts of aluminum-magnesium alloy according to claim 3, characterized in that: The infusion mechanism (4) also includes an air supply component (47) disposed inside the lower mold (12). The air supply component (47) includes a push block (471). The lower mold (12) has a through groove (472) communicating with the positioning groove (16). The push block (471) is slidably disposed in the through groove (472), and one side of it is fixed to the outer wall of the lifting rod (412). The lower mold (12) also has a valve groove (473) communicating with the through groove (472) and the receiving groove (121) respectively.

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