Preparation device and method of graphene composite aluminum rod

Abstract

The application discloses a kind of preparation device and method of graphene composite aluminum rod, it is related to the technical field of composite material forming processing device.The present application includes the mixing tank being set on processing table, further include: mixing unit, it is set in mixing tank, including stirring assembly and aeration assembly;Wherein stirring assembly is provided with lower spiral blade and upper spiral blade to the stirring mixing of graphene powder and aluminum powder and forms mixed powder;Punching unit is set on processing table, including pre-pressing component, stamping component and segmented component.Advantages are that: the present application realizes the uniform mixing of aluminum powder and graphene powder by inert gas flow and two-way spiral blade, avoids the stratification of aluminum powder and graphene powder, then pre-pressing component is discharged in advance to reduce the internal air of mixed powder to reduce forming defects, then cooperate segmented stamping to guarantee the density of long rod and the uniformity of electric conduction, meet the use requirement of 5G base station, server and the like electrically conductive connecting rod.

Description

Technical Field

[0001] This invention relates to the technical field of composite material molding and processing equipment, and in particular to an apparatus and method for preparing graphene composite aluminum rods. Background Technology

[0002] Graphene-composite aluminum rods combine the lightweight and easy-to-process advantages of aluminum with the ultra-high conductivity, high strength, and high thermal conductivity of graphene, making them a new generation of core materials to replace traditional pure aluminum and copper conductive rods. With the large-scale deployment of 5G base stations, the continuous upgrading of data center computing power, and the rapid popularization of high-power new energy power supplies, the requirements for lightweight, low-loss, and high-reliability conductive connecting rods are becoming increasingly stringent, demanding technical standards far exceeding those for traditional materials in terms of component uniformity, density, and overall rod conductivity consistency.

[0003] Existing graphene composite aluminum rod preparation devices mostly use single mechanical stirring in the mixing stage, which is difficult to overcome the problem of stratification due to the density difference between aluminum powder and graphene. It is also prone to graphene sheet damage and aluminum powder oxidation, and there is a risk of dust explosion. Insufficient pre-pressing and venting can easily lead to porosity and delamination defects in the green blank after stamping. The stamping process mostly uses a hydraulic stamping structure, which cannot withstand high-frequency impact and is prone to sealing oil leakage and pressure instability. When forming long rods, due to the large axial density gradient, there is interfacial resistance in the splicing structure, which is difficult to meet the requirements of high-end conductive components.

[0004] Therefore, there is an urgent need to design a preparation device and method for graphene composite aluminum rods to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an apparatus and method for preparing graphene composite aluminum rods, solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a preparation apparatus for graphene composite aluminum rods, comprising a mixing tank disposed on a processing table, and further comprising: A mixing unit, located inside a mixing tank, includes a stirring assembly and an aeration assembly; The stirring assembly is equipped with a lower spiral blade and an upper spiral blade to stir and mix graphene powder and aluminum powder to form a mixed powder. The gas filling assembly is equipped with multiple high-pressure nozzles that fill the mixing tank with high-speed inert gas. The stamping unit, mounted on the processing table, includes a pre-pressing assembly, a stamping assembly, and a segmentation assembly; The pre-compression component includes an arc-shaped pressure block that performs preliminary extrusion of the mixed powder to remove gas from the mixed powder; the stamping component includes a stamping block that stamps the mixed powder; and the segmentation component is used to achieve segmented stamping of the mixed powder.

[0007] Preferably, a controller is fixedly installed on the processing table, a PLC controller is fixedly installed on the controller, a control panel is fixedly installed on the PLC controller, and the control panel and the PLC controller are electrically connected. The control panel uses a PLC controller to control the start-up and operation status of the mixing unit and the stamping unit.

[0008] Preferably, the stirring assembly includes a first transmission rod rotatably connected inside the mixing tank, a connecting frame fixedly mounted on the first transmission rod, a scraper fixedly mounted on the first transmission rod, the scraper being used to scrape off the mixed powder adhering to the inner wall of the mixing tank, the lower spiral blade being fixedly mounted on the connecting frame, and the upper spiral blade being located around the lower spiral blade and fixedly mounted on the connecting frame. A first rotating motor is fixedly installed at the top of the mixing tank, and the drive end of the first rotating motor is fixedly connected to the first transmission rod.

[0009] Preferably, the inflation assembly includes an air tank fixedly installed on the processing table, the air outlet of the air tank is fixedly connected to a first air supply pipe, and a plurality of high-pressure nozzles are fixedly installed inside the mixing tank, with the high-pressure nozzles and the first air supply pipe being fixedly connected. A reflux mechanism is provided at the top of the inside of the mixing tank.

[0010] Preferably, the reflux mechanism includes several exhaust ports opened at the top of the inside of the mixing tank, each exhaust port is fixedly installed with a filter plate for filtering the mixed powder, the air inlet of the gas storage tank is fixedly installed with a booster pump, each exhaust port and the booster pump are fixedly connected to a second gas supply pipe, the second gas supply pipe is provided with a three-way solenoid valve, and the three-way solenoid valve is fixedly connected to a gas supply pipe for replenishing inert gas; A brush holder is fixedly installed on the first transmission rod. The brush holder is used to brush off the mixed powder adhering to the surface of the filter plate.

[0011] Preferably, the pre-compression assembly includes a conveying pipe fixedly connected to the outlet of the mixing tank, a spiral conveying rod is provided inside the conveying pipe, one end of the spiral conveying rod is fixedly connected to one end of the first transmission rod, and a pre-compression chamber is fixedly connected to one end of the conveying pipe. A first spring telescopic frame is fixedly installed at one end of the spiral conveyor rod, and an arc-shaped pressure block is fixedly installed on the first spring telescopic frame. A telescopic chamber is fixedly connected to the pre-compression chamber. A second spring telescopic frame is fixedly installed inside the telescopic chamber, and a support plate is fixedly installed on the second spring telescopic frame. The pre-compression chamber is slidably connected to a movable tube, and a first electric push rod is fixedly installed on the pre-compression chamber. The telescopic end of the first electric push rod is fixedly connected to the movable tube, and two baffles are fixedly installed on the movable tube, and the two baffles are slidably connected to the pre-compression chamber.

[0012] Preferably, the stamping assembly includes a vibrating frame fixedly mounted on a processing table, a sliding frame slidably connected to the vibrating frame, an adjustment groove provided on the sliding frame, two adjustment blocks slidably connected to the adjustment groove, a bidirectional lead screw rotatably connected to the adjustment groove and threadedly engaged with the two adjustment blocks, a servo motor fixedly mounted on the sliding frame, the drive end of the servo motor being fixedly connected to the bidirectional lead screw, and the stamping block being fixedly mounted on the sliding frame; The vibration frame is equipped with a power mechanism.

[0013] Preferably, the power mechanism includes two eccentric wheels rotatably connected to the vibration frame, and each of the two eccentric wheels is provided with a ball joint transmission rod between it and the corresponding adjusting block; A second rotating motor is fixedly installed on the vibration frame, and a gear is rotatably connected to the vibration frame. The drive end of the second rotating motor and the gear are fixedly connected. Both eccentric wheels are provided with racks that mesh with the gears.

[0014] Preferably, the segmented assembly includes a segmented chamber disposed on the pre-compression chamber, the segmented chamber having a plurality of sliding openings, each of the sliding openings being slidably connected to an adjusting plate, and a plurality of second electric push rods being fixedly installed on the segmented chamber, the telescopic end of each second electric push rod being fixedly connected to a corresponding adjusting plate.

[0015] A production mixing method for a graphene composite aluminum rod preparation apparatus, used in the aforementioned graphene composite aluminum rod preparation apparatus, includes the following steps: S1. Add graphene powder and aluminum powder into a mixing tank to prepare for the mixing process; S2. Start the stirring assembly to stir the powder through the lower and upper spiral blades. Then turn on the aeration assembly to inject high-speed inert gas into the mixing tank through the high-pressure nozzle to assist in mixing. S3. The uniformly mixed powder is conveyed to the stamping unit, where the powder is initially squeezed by the arc-shaped pressure block of the pre-pressing component to expel the gas inside the powder. S4. Use segmented components to perform segmented stamping of the degassed mixed powder; S5. The segmented powder is stamped by the stamping block of the stamping component to obtain the graphene composite aluminum rod.

[0016] This invention provides an apparatus and method for preparing graphene-composite aluminum rods. It has the following beneficial effects: 1. When preparing graphene composite aluminum rods, this preparation device uses a stirring component and a gas-filling component to mix the aluminum powder and graphene powder in the mixing tank. The high-speed inert gas will disperse the aluminum powder and graphene powder in the mixing tank, offset the stratification caused by density difference, and gently disperse the soft agglomerates of graphene. This avoids excessive shearing during stirring and damage to the sheets. At the same time, the inert gas can prevent the aluminum powder from oxidizing and eliminate the risk of dust explosion.

[0017] 2. When preparing graphene composite aluminum rods, this preparation device uses an arc-shaped pressure block on the pre-pressing component to initially compress the mixed powder, thereby expelling the trapped air inside the mixed powder in advance and avoiding defects such as air holes and delamination during stamping. In addition, the second spring telescopic frame provides flexible support to ensure uniform pre-pressure, improve the density and structural integrity of the green blank, and lay the foundation for subsequent stamping.

[0018] 3. When preparing graphene composite aluminum rods, the eccentric wheel and ball joint drive pure mechanical structure on the stamping component of this preparation device are inherently resistant to high-frequency impacts and have no sealing oil leakage or pressure instability problems compared with traditional hydraulic stamping. Furthermore, the stamping stroke and pressure are finely adjusted by the bidirectional lead screw, so that the mixed powder forming accuracy is high and it can meet the densification requirements of the mixed powder.

[0019] 4. When preparing graphene composite aluminum rods, this preparation device achieves segmented stamping of mixed powders through segmented components, which solves the problem of uneven axial density of long rod-shaped aluminum rods during stamping, ensuring that the graphene is evenly distributed throughout the rod without splicing seams or interface resistance, thereby meeting the high reliability requirements of conductive connection rods for 5G base stations, servers, and high-power power supplies.

[0020] In summary, this invention achieves uniform mixing of aluminum powder and graphene powder through inert airflow combined with bidirectional spiral blades, avoiding the separation of aluminum powder and graphene powder. The pre-pressing component removes internal air from the mixed powder in advance to reduce molding defects. Furthermore, segmented stamping ensures the density and conductivity uniformity of the long rod, meeting the requirements for conductive connecting rods in 5G base stations, servers, and other applications.

[0021] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0022] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a graphene composite aluminum rod preparation device proposed in this invention; Figure 2 for Figure 1A schematic diagram of the structure after rotation at a certain angle; Figure 3 for Figure 2 A schematic diagram of the structure of the removal processing table; Figure 4 for Figure 3 A schematic diagram of the structure after rotation at a certain angle; Figure 5 for Figure 3 Schematic diagram of the structure of the mixing tank and the gas storage tank; Figure 6 for Figure 5 Schematic diagram of the internal structure of the mixing tank; Figure 7 for Figure 6 Schematic diagram of the reflux mechanism; Figure 8 for Figure 3 Schematic diagram of the internal structure of the conveying pipe, pre-compression chamber and expansion chamber; Figure 9 for Figure 4 Schematic diagram of the structure of the vibration frame and the segmented chamber; Figure 10 for Figure 9 Schematic diagram of the internal structure of the vibration frame; Figure 11 for Figure 10 Enlarged view of the node at point A in the middle; Figure 12 for Figure 9 Schematic diagram of the internal structure of the middle section chamber; Figure 13 for Figure 12 A schematic diagram of the structure of the adjustment plate.

[0023] In the diagram: 1. Processing table; 2. Controller; 3. Mixing tank; 4. Second electric push rod; 5. First transmission rod; 6. Connecting frame; 7. Downward spiral blade; 8. Upward spiral blade; 9. High-pressure nozzle; 10. First air supply pipe; 11. Filter plate; 12. Second air supply pipe; 13. Air storage tank; 14. Booster pump; 15. Brush holder; 16. First rotating motor; 17. Scraper; 18. Conveying pipe; 19. Spiral conveying rod; 20. First spring telescopic frame; 21. Arc-shaped pressure block ; 22. Pre-compression chamber; 23. Telescopic chamber; 24. Second spring telescopic frame; 25. Support plate; 26. First electric push rod; 27. Moving tube; 28. Baffle; 29. ​​Vibration frame; 30. Sliding frame; 31. Adjusting groove; 32. Adjusting block; 33. Bidirectional lead screw; 34. Servo motor; 35. Stamping block; 36. Gear; 37. Eccentric wheel; 38. Rack; 39. Ball joint transmission rod; 40. Second rotary motor; 41. Segmentation chamber; 42. Slide opening; 43. Adjusting plate. Detailed Implementation

[0024] 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.

[0025] Example 1: Refer to Figure 1 - Figure 4 A preparation apparatus for graphene composite aluminum rods includes a mixing tank 3 mounted on a processing table 1. The processing table 1 provides a rigid load-bearing foundation for the entire apparatus, absorbs vibration and impact during the stamping process, ensures the stability of equipment operation, and avoids forming accuracy deviations caused by vibration. The preparation apparatus also includes: A mixing unit, located inside the mixing tank 3, includes a stirring assembly and an aeration assembly; The stirring assembly is equipped with a lower spiral blade 7 and an upper spiral blade 8 for stirring and mixing graphene powder and aluminum powder to form a mixed powder. The stirring assembly uses the lower spiral blade 7 and the upper spiral blade 8 to rotate and stir the graphene powder and aluminum powder, so that the two powders form a convective motion in the tank, which can make the powder mix more evenly and fully, reduce agglomeration and stratification, and ensure the consistency of the raw materials for subsequent molding. The inflation component is equipped with multiple high-pressure nozzles 9 that inject high-speed inert gas into the mixing tank 3. The inflation component introduces high-speed inert gas into the mixing tank 3 through the high-pressure nozzles 9, which disperses the aluminum powder and graphene powder while stirring, effectively offsetting the stratification caused by density difference, preventing aluminum powder oxidation and dust explosion, and protecting the graphene sheets from damage.

[0026] The stamping unit is mounted on the processing table 1 and includes a pre-pressing assembly, a stamping assembly, and a segmentation assembly. The pre-pressing component is equipped with an arc-shaped pressure block 21 that performs preliminary extrusion of the mixed powder to remove gas from the mixed powder. The pre-pressing component relies on the arc-shaped pressure block 21 to perform preliminary extrusion of the mixed powder, and to remove the air trapped inside the powder before formal stamping, so as to avoid defects such as pores and delamination in the final product and improve the density and structural integrity of the green body. The stamping assembly is equipped with a stamping block 35 for stamping the mixed powder. The stamping assembly applies a stamping force to the mixed powder through the stamping block 35, compacting the loose powder into a dense structure. Compared with ordinary structures, it is more stable and reliable, less prone to pressure instability, and can ensure that the aluminum rod is dense and uniform as a whole, with sufficient structural strength. The segmented assembly is used to achieve segmented stamping of the mixed powder. The segmented assembly stamps the mixed powder in segments, making the axial density of the long rod-shaped blank more uniform. This ensures that the graphene is uniformly distributed in the rod and has no interface resistance, which can better meet the usage requirements of conductive connection rods for 5G base stations, servers, and high-power power supplies.

[0027] A controller 2 is fixedly installed on the processing table 1, a PLC controller is fixedly installed on the controller 2, a control panel is fixedly installed on the PLC controller, and the control panel and the PLC controller are electrically connected. The control panel uses a PLC controller to control the start-up and operation status of the mixing unit and the stamping unit, thereby achieving linkage between various processes.

[0028] Example 2: Refer to Figure 5 - Figure 7 The technical solution that differs from that of Embodiment 1 is as follows: the stirring assembly includes a first transmission rod 5 rotatably connected inside the mixing tank 3. The mixing tank 3 is provided with a sealed feed port at the top and a conical discharge port at the bottom. The mixing tank 3 is used to provide a sealed mixing space, isolate external air, ensure the stability of the inert gas atmosphere, and has a smooth inner wall that does not easily stick to powder, making it easy for powder to be discharged. The first transmission rod 5 is a solid alloy steel rod used to transmit rotational power. The coaxial transmission has no phase difference, ensuring the synchronization of the movement of each component and high transmission efficiency. A connecting frame 6 is fixedly installed on the first transmission rod 5, and a scraper 17 is fixedly installed on the first transmission rod 5. The scraper 17 is used to scrape off the mixed powder adhering to the inner wall of the mixing tank 3. The lower spiral blade 7 is fixedly installed on the connecting frame 6. The connecting frame 6 is used to fix the upper spiral blade 8, the lower spiral blade 7, and the scraper 17 on the same axis to ensure smooth operation without shaking and to prevent the various parts from colliding with the tank wall. The scraper 17 is used to scrape off the mixed powder adhering to the inner wall of the mixing tank 3 to prevent the mixed powder from adhering and clumping for a long time. The upper spiral blade 8 is located around the lower spiral blade 7 and is fixedly mounted on the connecting frame 6. The lower spiral blade 7 is located in the central area, and the upper spiral blade 8 surrounds it and rotates in the opposite direction. When the first transmission rod 5 drives both to rotate synchronously, the downward spiral blade 7 pushes the aluminum powder and graphene powder at the bottom of the mixing tank 3 upward to form a central upward flow, while the upward spiral blade 8 pushes the powder near the tank wall downward to form an outer downward flow. Together, they construct a continuously circulating three-dimensional convective stirring flow field, eliminating the stirring dead angle in the mixing tank 3, and effectively counteracting the stratification tendency of aluminum powder and graphene caused by the density difference, achieving uniform mixing of the two powders. Moreover, the shear force during the stirring process is gentle and will not excessively damage the graphene sheet structure. A first rotating motor 16 is fixedly installed at the top of the mixing tank 3. The drive end of the first rotating motor 16 is fixedly connected to the first transmission rod 5. The first rotating motor 16 is used to provide a unified power source for the stirring, scraping, dust removal and feeding processes. It drives multiple components to operate synchronously through a single motor, resulting in a compact structure.

[0029] In a further embodiment, the gas filling assembly includes a gas storage tank 13 fixedly installed on the processing table 1. The gas storage tank 13 is a carbon steel pressure vessel used to store inert gas and provide a stable high-pressure gas source so that the high-pressure nozzle 9 can continuously and stably spray gas. The outlet of the gas storage tank 13 is fixedly connected to a first gas supply pipe 10. The first gas supply pipe 10 is used to transport high-pressure argon gas from the gas storage tank 13 to the high-pressure nozzle 9. Several high-pressure nozzles 9 are fixedly installed inside the mixing tank 3, and the high-pressure nozzles 9 and the first gas supply pipe 10 are fixedly connected. The high-pressure nozzle 9 is used to spray high-speed inert gas to form a rotating fluidized bed, which thoroughly disperses aluminum powder and graphene powder, offsets the density difference stratification, and gently disperses the soft agglomerates of graphene. The nozzle holes on the high-pressure nozzle 9 are set at a certain angle upward, and the airflow sprayed upward can diffuse and tumble from bottom to top, fully dispersing the graphene powder and aluminum powder.

[0030] In a further embodiment, a reflux mechanism is provided at the top of the mixing tank 3. The reflux mechanism includes several exhaust ports opened at the top of the mixing tank 3. Each exhaust port is fixedly installed with a filter plate 11 for filtering mixed powder. The filter plate 11 is used to filter mixed powder in the gas and trap ultrafine powder. The filter plate 11 is only permeable to air and not to powder, so as to prevent powder from being lost with the gas. A booster pump 14 is fixedly installed at the air inlet of the gas storage tank 13. The booster pump 14 pressurizes the return gas to maintain the system circulation pressure. A second gas supply pipe 12 is fixedly connected between each exhaust port and the booster pump 14. The second gas supply pipe 12 is used to deliver the filtered return gas to the booster pump 14 to form a complete gas circulation loop and reduce the consumption of inert gas. A three-way solenoid valve is installed on the second gas supply pipe 12. A gas supply pipe for replenishing inert gas is fixedly connected to the three-way solenoid valve. The three-way solenoid valve is used to control the switching between return gas and replenished inert gas. A brush holder 15 is fixedly installed on the first transmission rod 5. The brush holder 15 is used to brush off the mixed powder adhering to the surface of the filter plate 11, prevent the filter plate 11 from clogging, and ensure smooth gas return.

[0031] Example 3: Refer to Figure 8 - Figure 13 The difference between this embodiment and embodiment two is that the pre-compression component includes a conveying pipe 18 fixedly connected to the outlet of the mixing tank 3. The conveying pipe 18 is used to connect the outlet of the mixing tank 3 and the pre-compression chamber 22 to convey the mixed powder. An electromagnetic valve is provided on the conveying pipe 18. A spiral conveying rod 19 is provided inside the conveying pipe 18. One end of the spiral conveying rod 19 is fixedly connected to one end of the first transmission rod 5. One end of the conveying pipe 18 is fixedly connected to the pre-compression chamber 22. The spiral conveying rod 19 is used to quantitatively convey the mixed powder to the pre-compression chamber 22. The spiral conveying rod 19 is synchronously linked with the stirring process to ensure that the amount of powder in each section is consistent. The pre-compression chamber 22 is used to provide a pre-compression sealed space to provide a foundation for subsequent stamping. One end of the spiral conveyor rod 19 is fixedly installed with a first spring telescopic frame 20, and the arc-shaped pressure block 21 is fixedly installed on the first spring telescopic frame 20. The first spring telescopic frame 20 is used to provide elastic support for the arc-shaped pressure block 21 to achieve flexible pre-pressing and avoid aluminum powder cold welding agglomeration caused by hard extrusion. The arc-shaped pressure block 21 is used to perform preliminary extrusion on the mixed powder to make the pre-pressure evenly distributed and to expel the gas inside the mixed powder in advance, so as to avoid the occurrence of air holes and delamination defects during stamping. A telescopic chamber 23 is fixedly connected to the pre-compression chamber 22. A second spring telescopic frame 24 is fixedly installed inside the telescopic chamber 23. A support plate 25 is fixedly installed on the second spring telescopic frame 24. The telescopic chamber 23 is used to install the second spring telescopic frame 24 and the support plate 25 to ensure the straightness of the axial movement of the support plate 25. The second spring telescopic frame 24 is used to provide reverse flexible support for the support plate 25 to offset the pre-compression impact force and ensure uniform pre-compression. The support plate 25 is used to support the powder in the pre-compression chamber 22 and bear the pre-compression. The pre-compression chamber 22 is slidably connected to a movable tube 27. A first electric push rod 26 is fixedly installed on the pre-compression chamber 22. The telescopic end of the first electric push rod 26 is fixedly connected to the movable tube 27. Two baffles 28 are fixedly installed on the movable tube 27, and the two baffles 28 are slidably connected to the pre-compression chamber 22. Before the pre-pressing process begins, the moving pipe 27 is coaxially aligned with the conveying pipe 18 and the telescopic chamber 23. The second spring telescopic frame 24 is in a naturally extended state, pushing the support plate 25 through the inner cavity of the moving pipe 27 and extending into the discharge end of the conveying pipe 18 to form a receiving surface. When the screw conveyor 19 continuously feeds the mixed powder into the conveying pipe 18, the powder accumulates on the support plate 25. As the amount of powder increases, gravity gradually overcomes the elastic force of the second spring telescopic frame 24, pushing the support plate 25 to move slowly downward. When the support plate 25 is completely lowered into the telescopic chamber 23, the inner cavity of the moving tube 27 is just filled with a fixed amount of mixed powder, completing the pre-pressing feeding. At this time, the first electric push rod 26 is activated, pushing the moving tube 27 to move horizontally towards the stamping assembly. Two baffles 28 fixed on the moving tube 27 move synchronously. The baffle 28 on the side closer to the conveying tube 18 immediately closes the outlet of the conveying tube 18 to prevent the mixed powder in the conveying tube 18 from leaking out. The baffle 28 on the side closer to the telescopic chamber 23 blocks the end face of the support plate 25, restricts the second spring telescopic frame 24 from rebounding, keeps the support plate 25 in the telescopic chamber 23, and ensures that the pre-pressed powder in the moving tube 27 is completely transferred to the stamping station for subsequent stamping and forming.

[0032] In a further embodiment, the stamping assembly includes a vibrating frame 29 fixedly mounted on the processing table 1, and a sliding frame 30 slidably connected to the vibrating frame 29. The vibrating frame 29 is used to support the sliding frame 30 and absorb the vibration during stamping to ensure stamping accuracy. The sliding frame 30 is used to drive the stamping block 35 to perform linear reciprocating motion. The sliding frame 30 is provided with an adjustment groove 31, and two adjustment blocks 32 are slidably connected to the adjustment groove 31. The adjustment blocks 32 slide on the adjustment groove 31 to change the stamping stroke. A bidirectional lead screw 33 is rotatably connected to the adjustment groove 31 and is threadedly engaged with the two adjustment blocks 32. The bidirectional lead screw 33 is used to drive the two adjustment blocks 32 to move in opposite directions or in the opposite direction, which can finely adjust the stamping stroke and meet the high-precision forming requirements. A servo motor 34 is fixedly installed on the sliding frame 30. The drive end of the servo motor 34 is fixedly connected to the bidirectional lead screw 33. The servo motor 34 is used to drive the bidirectional lead screw 33 to rotate, so as to precisely control the position of the adjusting block 32. The stamping block 35 is fixedly installed on the sliding frame 30 to apply stamping load to the segmented powder to achieve densification molding.

[0033] In a further embodiment, a power mechanism is provided on the vibration frame 29. The power mechanism includes two eccentric wheels 37 rotatably connected to the vibration frame 29. The eccentric wheels 37 are used to convert rotational motion into linear reciprocating motion. The eccentric wheels 37 are purely mechanical structures that can withstand high-frequency impacts and have no hydraulic system sealing leakage or pressure instability problems, which greatly improves the service life of the equipment. A ball joint transmission rod 39 is provided between each of the two eccentric wheels 37 and the corresponding adjusting block 32. The ball joint transmission rod 39 is used to connect the eccentric wheels 37 and the adjusting block 32, converting the circular motion of the eccentric wheels 37 into the linear motion of the sliding frame 30. A second rotary motor 40 is fixedly installed on the vibration frame 29. A gear 36 is rotatably connected to the vibration frame 29, and the drive end of the second rotary motor 40 is fixedly connected to the gear 36. Each of the two eccentric wheels 37 is provided with a rack 38 that meshes with the gear 36. The cooperation between the gear 36 and the rack 38 transmits the power of the second rotary motor 40 to the two eccentric wheels 37, ensuring that the two eccentric wheels 37 rotate synchronously.

[0034] In a further embodiment, the segmented assembly includes a segmented chamber 41 disposed on the pre-compression chamber 22. The segmented chamber 41 is used to provide segmented stamping space. The segmented chamber 41 has a plurality of sliding openings 42. Each sliding opening 42 is slidably connected to an adjusting plate 43. A plurality of second electric push rods 4 are fixedly installed on the segmented chamber 41. The telescopic end of each second electric push rod 4 is fixedly connected to the corresponding adjusting plate 43. Each adjusting plate 43 has a drop hole with the same diameter as the aluminum rod. When the mixed powder is stamped, the uppermost second electric push rod 4 pushes the adjustment plate 43 to move, so that the drop hole on the adjustment plate 43 is completely aligned with the axial channel of the segment chamber 41, and the stamped first section of aluminum rod falls to the receiving surface of the adjacent adjustment plate 43 below under the action of gravity. The conveying pipe 18 transfers the new pre-compressed mixed powder to the first aluminum rod again, and the stamping block 35 moves down again to apply the stamping load, which not only compacts the new mixed powder into the second aluminum rod, but also presses the lower end face of the newly formed second aluminum rod with the upper end face of the already formed first aluminum rod below through the stamping pressure, so as to achieve a seamless bonding between the two sections. Repeat the above steps. After each section of aluminum rod is stamped, the corresponding adjustment plate 43 moves sequentially, causing the formed aluminum rods to fall and stack one by one, eventually forming a complete long rod-shaped graphene composite aluminum rod.

[0035] The specific working principle of this preparation device is as follows: The proportioned graphene powder and aluminum powder are fed into the sealed feed port at the top of the mixing tank 3. The equipment is started through the control panel of the controller 2. The first rotating motor 16 starts first, driving the first transmission rod 5 to synchronously drive the connecting frame 6, the lower spiral blade 7, the upper spiral blade 8, the scraper 17 and the brush frame 15 to rotate at a uniform speed. At the same time, the gas storage tank 13 and the booster pump 14 are started, and the gas filling component and the reflux mechanism start to operate, and an inert gas atmosphere is quickly established in the mixing tank 3. The downward spiral blade 7 located in the center pushes the denser aluminum powder at the bottom of the tank upward to form a central upward flow, while the upward spiral blade 8 on the periphery pushes the powder near the tank wall downward to form a peripheral downward flow. Together, they construct a continuously circulating three-dimensional convective stirring flow field, eliminating the stirring dead zone inside the tank. Meanwhile, the high-pressure inert gas in the gas storage tank 13 is transported to the high-pressure nozzle 9 at the bottom of the mixing tank 3 through the first gas supply pipe 10. The nozzle sprays high-speed swirling gas at an angle upward, which tumbles and disperses the powder from bottom to top, forming a local fluidized bed. This completely eliminates the density difference between aluminum powder and graphene, gently disperses the soft agglomerates of graphene without damaging the sheet structure. After the mixed gas is filtered by the top filter plate 11 to retain the powder, it is pressurized by the booster pump 14 and flows back to the gas storage tank 13 through the second gas supply pipe 12. The brush frame 15 rotates with the transmission rod to continuously clean the powder adhering to the surface of the filter plate 11 and prevent blockage. After mixing, the solenoid valve on the conveying pipe 18 is opened, and the spiral conveying rod 19 rotates synchronously with the first transmission rod 5, quantitatively conveying the mixed powder into the conveying pipe 18 to pre-compress the mixed powder. The mixed powder conveyed by the spiral conveying rod 19 accumulates on the support plate 25. During this process, the spiral conveying rod 19 continues to rotate, driving the arc-shaped pressure block 21 to rotate. The powder is initially squeezed by the flexible support of the first spring telescopic frame 20 to expel air from the mixed powder and avoid the generation of air holes and delamination defects during stamping. As the mixed powder continuously accumulates on the support plate 25, the gravity of the mixed powder gradually overcomes the elastic force of the second spring telescopic frame 24, pushing the support plate 25 to move slowly downward. When the support plate 25 is completely lowered into the telescopic chamber 23, the inner cavity of the moving tube 27 is just filled with a quantitative amount of mixed powder, achieving precise quantitative feeding. At this time, the first electric push rod 26 is activated, pushing the moving tube 27 to move horizontally towards the stamping station. The two baffles 28 fixed on the moving tube 27 move synchronously. The baffle 28 on the side closer to the conveying tube 18 closes the outlet of the conveying tube 18 to prevent subsequent powder leakage. The baffle 28 on the side closer to the telescopic chamber 23 blocks the end face of the support plate 25, restricting the rebound of the second spring telescopic frame 24 and ensuring the complete transfer of the pre-pressed powder.

[0036] When the pre-pressed powder is transferred to the adjusting plate 43, the second rotating motor 40 is started. The second rotating motor 40 drives the gear 36 to rotate. The gear 36 meshes with the rack 38 on the two eccentric wheels 37, causing the two eccentric wheels 37 to rotate synchronously in opposite directions. The circular motion of the eccentric wheels 37 is converted into the linear reciprocating motion of the sliding frame 30 along the vibrating frame 29 through the ball joint transmission rod 39. This, in turn, drives the stamping block 35 to generate high-frequency impact stamping, completing the densification forming of the first section of aluminum rod. During the stamping process, the servo motor 34 drives the bidirectional lead screw 33 to rotate, which can precisely adjust the distance between the two adjusting blocks 32, finely adjust the stamping stroke and pressure, and ensure the forming accuracy. After the first stamping is completed, the uppermost second electric push rod 4 drives the connected adjustment plate 43 to move, so that the drop hole on the adjustment plate 43 is aligned with the axial channel of the segment chamber 41, and the stamped first aluminum rod falls to the bearing surface of the adjacent adjustment plate 43 below under the action of gravity. At this time, the first electric push rod 26 pushes a pre-compressed mixed powder again, and transfers the pre-compressed mixed powder to the receiving surface of the uppermost adjusting plate 43. The stamping block 35 moves down again to apply a stamping load, which not only compacts the new mixed powder into the second aluminum rod, but also presses the lower end face of the newly formed second aluminum rod with the upper end face of the already formed first aluminum rod below through the stamping pressure, so as to achieve a seamless bonding between the two sections. Repeat the above steps. After each section of aluminum rod is stamped, the corresponding adjustment plate 43 expands and contracts sequentially, causing the formed aluminum rods to fall and stack one by one, eventually forming a complete long rod-shaped graphene composite aluminum rod. The processed graphene composite aluminum rod is discharged from the segmentation chamber 41 and enters the subsequent processing steps.

[0037] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A preparation apparatus for graphene composite aluminum rods, comprising a mixing tank (3) disposed on a processing table (1), characterized in that, Also includes: A mixing unit, located inside a mixing tank (3), includes a stirring assembly and an aeration assembly; The stirring assembly is equipped with a downward spiral blade (7) and an upward spiral blade (8) for stirring and mixing graphene powder and aluminum powder to form a mixed powder. The gas filling assembly is equipped with multiple high-pressure nozzles (9) for filling the mixing tank (3) with high-speed inert gas. The stamping unit is set on the processing table (1) and includes a pre-pressing assembly, a stamping assembly and a segmentation assembly; The pre-compression component is equipped with an arc-shaped pressure block (21) for initially compressing the mixed powder and removing gas from the mixed powder, the stamping component is equipped with a stamping block (35) for stamping the mixed powder, and the segmentation component is used to realize the segmented stamping of the mixed powder.

2. The apparatus for preparing a graphene composite aluminum rod according to claim 1, characterized in that, A controller (2) is fixedly installed on the processing table (1), a PLC controller is fixedly installed on the controller (2), a control panel is fixedly installed on the PLC controller, and the control panel and the PLC controller are electrically connected. The control panel uses a PLC controller to control the start-up and operation status of the mixing unit and the stamping unit.

3. The apparatus for preparing a graphene composite aluminum rod according to claim 1, characterized in that, The stirring assembly includes a first transmission rod (5) rotatably connected inside the mixing tank (3), a connecting frame (6) fixedly installed on the first transmission rod (5), a scraper (17) fixedly installed on the first transmission rod (5), the scraper (17) being used to scrape off the mixed powder adhering to the inner wall of the mixing tank (3), the lower spiral blade (7) being fixedly installed on the connecting frame (6), and the upper spiral blade (8) being located around the lower spiral blade (7) and fixedly installed on the connecting frame (6); The mixing tank (3) is fixedly installed with a first rotating motor (16) at the top, and the drive end of the first rotating motor (16) is fixedly connected to the first transmission rod (5).

4. The apparatus for preparing a graphene composite aluminum rod according to claim 3, characterized in that, The inflation assembly includes an air tank (13) fixedly installed on the processing table (1), the air outlet of the air tank (13) is fixedly connected to a first air supply pipe (10), and several high-pressure nozzles (9) are fixedly installed inside the mixing tank (3), and the high-pressure nozzles (9) and the first air supply pipe (10) are fixedly connected. The mixing tank (3) is equipped with a reflux mechanism at its top.

5. The apparatus for preparing a graphene composite aluminum rod according to claim 4, characterized in that, The reflux mechanism includes several exhaust ports opened at the top of the mixing tank (3). Each exhaust port is fixedly installed with a filter plate (11) for filtering the mixed powder. The air inlet of the gas storage tank (13) is fixedly installed with a booster pump (14). Each exhaust port and the booster pump (14) are connected together by a second gas supply pipe (12). The second gas supply pipe (12) is equipped with a three-way solenoid valve. The three-way solenoid valve is fixedly connected with a gas supply pipe for replenishing inert gas. A brush holder (15) is fixedly installed on the first transmission rod (5). The brush holder (15) is used to brush off the mixed powder adhering to the surface of the filter plate (11).

6. The apparatus for preparing a graphene composite aluminum rod according to claim 4, characterized in that, The pre-compression assembly includes a conveying pipe (18) fixedly connected to the outlet of the mixing tank (3). A spiral conveying rod (19) is provided inside the conveying pipe (18). One end of the spiral conveying rod (19) is fixedly connected to one end of the first transmission rod (5). One end of the conveying pipe (18) is fixedly connected to the pre-compression chamber (22). The spiral conveyor rod (19) is fixedly installed with a first spring telescopic frame (20) at one end, and the arc-shaped pressure block (21) is fixedly installed on the first spring telescopic frame (20). The pre-compression chamber (22) is fixedly connected to the telescopic chamber (23). The telescopic chamber (23) is fixedly installed inside the telescopic chamber (23). The second spring telescopic frame (24) is fixedly installed on the second spring telescopic frame (24). The pre-compression chamber (22) is slidably connected to a moving tube (27). A first electric push rod (26) is fixedly installed on the pre-compression chamber (22). The telescopic end of the first electric push rod (26) is fixedly connected to the moving tube (27). Two baffles (28) are fixedly installed on the moving tube (27), and the two baffles (28) are slidably connected to the pre-compression chamber (22).

7. The apparatus for preparing a graphene composite aluminum rod according to claim 6, characterized in that, The stamping assembly includes a vibrating frame (29) fixedly mounted on a processing table (1), a sliding frame (30) slidably connected to the vibrating frame (29), an adjustment groove (31) provided on the sliding frame (30), two adjustment blocks (32) slidably connected to the adjustment groove (31), a bidirectional lead screw (33) rotatably connected to the adjustment groove (31) and threadedly engaged with the two adjustment blocks (32), a servo motor (34) fixedly mounted on the sliding frame (30), the drive end of the servo motor (34) and the bidirectional lead screw (33) fixedly connected, and the stamping block (35) fixedly mounted on the sliding frame (30). The vibration frame (29) is equipped with a power mechanism.

8. The apparatus for preparing a graphene composite aluminum rod according to claim 7, characterized in that, The power mechanism includes two eccentric wheels (37) rotatably connected to the vibrating frame (29), and each of the two eccentric wheels (37) is provided with a ball joint transmission rod (39) between it and the corresponding adjusting block (32). A second rotating motor (40) is fixedly installed on the vibration frame (29). A gear (36) is rotatably connected to the vibration frame (29), and the drive end of the second rotating motor (40) and the gear (36) are fixedly connected. Both eccentric wheels (37) are provided with racks (38) that mesh with the gears (36).

9. The apparatus for preparing a graphene composite aluminum rod according to claim 7, characterized in that, The segmented assembly includes a segmented chamber (41) disposed on the pre-compression chamber (22). The segmented chamber (41) has several sliding openings (42). Each sliding opening (42) is slidably connected to an adjusting plate (43). Several second electric push rods (4) are fixedly installed on the segmented chamber (41). The telescopic end of each second electric push rod (4) is fixedly connected to the corresponding adjusting plate (43).

10. A production mixing method for a graphene composite aluminum rod preparation apparatus, used in the graphene composite aluminum rod preparation apparatus as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Add graphene powder and aluminum powder into the mixing tank (3) to prepare for the mixing process; S2. Start the stirring assembly and stir the powder with the lower spiral blade (7) and the upper spiral blade (8). Then turn on the gas filling assembly and fill the mixing tank (3) with high-speed inert gas through the high-pressure nozzle (9) to assist in mixing. S3. The uniformly mixed powder is conveyed to the stamping unit, and the powder is initially squeezed by the arc-shaped pressure block (21) of the pre-pressing component to expel the gas inside the powder. S4. Use segmented components to perform segmented stamping of the degassed mixed powder; S5. The segmented powder is stamped by the stamping block (35) of the stamping assembly to obtain the graphene composite aluminum rod.

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