A neodymium iron boron forming device

Abstract

This invention discloses a neodymium iron boron (NdFeB) forming device, belonging to the field of powder metallurgy pressing technology. It includes a base support, a hydraulic support column, and a platform partition. A pressure detection die is fixedly installed at the midpoint of the bottom of the platform partition. A pressing mechanism for pressing and distributing alloy powder is configured on the bottom surface of the pressure detection die. Through the magnetic coupling of a centrifugal remixing mechanism and a ring-driven redistribution mechanism, the alloy powder is directly intervened within the mold cavity after being fed into the die. Unlike existing technologies that rely solely on external premixing, this device can redistribute particles within the mold cavity before pressing. Utilizing rotary stirring and selective adsorption based on real-time magnetic detection, it actively overcomes the stratification tendency that occurs between heavy NdFeB powder and light graphene powder after feeding and accumulation, restoring and maintaining a highly uniform distribution of the powder before densification. This ensures the consistency of the internal composition of the pressed blank and improves the yield of sintered products.

Description

Technical Field

[0001] This invention relates to the field of powder metallurgy pressing and molding technology, and more specifically, to a neodymium iron boron molding apparatus. Background Technology

[0002] The manufacturing process of neodymium iron boron (NdFeB) permanent magnets is a typical powder metallurgy process. The core raw material is NdFeB alloy powder. The basic preparation process of sintered NdFeB magnets includes batching, powder preparation, molding, sintering, and subsequent processing and magnetization. Among these, the molding process is the key step that determines the quality of the green blank and the final magnet performance. Existing molding devices typically include core components such as molds and upper pressure heads. Some designs also incorporate electromagnetic coils around the mold to provide an orientation magnetic field, allowing the powder to be densified under pressure while simultaneously aligning the grains.

[0003] However, in actual operation, existing pressing and molding equipment struggles to reconcile the mechanical transmission logic of pressing force with the distribution law of magnetic field orientation when handling alloy powders with multiple components and multiple physical fields. In the field of permanent magnet material preparation, graphene is commonly added to enhance phase modification in order to improve the conductivity and corrosion resistance of NdFeB magnets. However, during vertical pressing, due to the density difference between materials, lightweight graphene particles tend to suspend at the top of the powder flow under gravity, while heavy NdFeB alloy powder preferentially settles, resulting in a graphene content at the bottom of the mold cavity after material discharge that is much lower than at the top.

[0004] To address the issue of uniformity in mixing, premixing is commonly used in existing technologies. However, alloy powders prepared through premixing can only achieve uniformity before filling. Once the alloy powder falls into the mold, the sorting effect of gravity quickly disrupts the established uniformity. Even if a vibration device is used to redistribute the powder, the vibration cannot directionally control the migration path of particles of different densities. In actual processing, this may actually exacerbate radial segregation, resulting in poor internal composition consistency of the pressed billet and reducing the yield of sintered products. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a neodymium iron boron forming device, which aims to solve the above-mentioned technical problems.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A neodymium iron boron forming device includes a base support, on the upper surface of which vertically arranged hydraulic support columns are fixedly connected, and a platform partition is fixedly connected to the top telescopic end of the hydraulic support columns. A pressure detection die head is fixedly installed at the bottom midpoint of the platform partition, and a pressing mechanism for pressing and distributing alloy powder is arranged on the bottom surface of the pressure detection die head.

[0008] The upper surface of the base support is fixedly connected to a circular base partition frame with a circular opening, and the upper surface of the circular base partition frame is equipped with an alloy powder pressing cylinder module located at the bottom of the pressing mechanism, while a ring drive reconfiguration mechanism is movably configured outside the alloy powder pressing cylinder module.

[0009] The alloy powder pressing cylinder module is equipped with a centrifugal remixing mechanism that is magnetically attracted to the externally configured ring-driven remixing mechanism. The centrifugal remixing mechanism includes a metal ring sleeve and a stirring cavity plate on the inner wall of the metal ring sleeve. A number of magnetic detection probes and a second electrically controlled magnetic block are also arranged at equal intervals on the stirring cavity plate to cooperate with the ring-driven rotation of the ring-driven remixing mechanism to perform secondary adsorption and homogenization of the alloy particles in the mixed powder discharged from the pressing mechanism.

[0010] As a further aspect of the present invention: the pressing mechanism includes a cavity pressing cylinder fixedly assembled on the bottom detection end of the pressure detection mold head. A partition plate is fixedly installed at the middle position inside the cavity pressing cylinder. Two symmetrically arranged powder storage chambers are fixedly installed on the top of the partition plate. A circular support plate is fixedly connected to the bottom of the partition plate, and a bearing sleeve is movably installed through the circular support plate. A winding cavity disk is fixedly installed on the bearing sleeve. A first servo motor with its output end connected to its winding shaft is fixedly installed on the side wall of the winding cavity disk. A traction wire extending from the center position of the bearing sleeve disk is wound on the winding shaft to control the traction state of the traction wire in coordination with the forward and reverse rotation of the winding shaft connected to the output end of the first servo motor. The centrifugal remixing mechanism is configured on the end of the traction wire to extend into the alloy powder pressing cylinder module directly opposite the bottom.

[0011] As a further aspect of the present invention: the bottom of the cavity pressure cylinder is open, and there is a spacer cavity between the open end and the bottom of the annular support plate to accommodate the centrifugal remixing mechanism pulled up by the traction wire. An assembly threaded sleeve is fixedly connected to the side wall of the open end, and a pressing die block is rotatably installed through the assembly threaded sleeve. The bottom of each powder storage cavity is fixedly connected to a drainage conduit, the bottom of which protrudes from the two side edges of the annular support plate. A supplementary conduit is fixedly installed at the top of each powder storage cavity, and an external hose for connecting to an external feeding end is connected to the end of each supplementary conduit. A hydraulic base rod for extending into the alloy powder pressing cylinder module is fixedly installed at the middle position of the upper surface of the base bracket through the circular opening on the surface of the annular base partition frame.

[0012] As a further aspect of the present invention: the centrifugal remixing mechanism further includes a circular airbag fixedly installed on the outer edge of a metal ring sleeve. A stirring cavity plate forming the diameter end is fixedly connected to the inner wall of the metal ring sleeve. The stirring cavity plate is generally inclined and sprays water at an angle. A cavity shaft is horizontally connected at the middle position inside. A movable head is fixedly installed at the middle position of the top of the cavity shaft. The movable head is a double-layer embedded movable sleeve structure. The movable end of the movable sleeve is fixedly connected to the end of the traction wire. Several horizontally arranged magnetic detection probes are fixedly installed at equal intervals on the surface of the cavity shaft. The magnetic detection end of each magnetic detection probe detects the amount of metal particles accumulated on the outside in real time through the stirring cavity plate.

[0013] As a further aspect of the present invention: the centrifugal remixing mechanism further includes side plates fixedly installed inside the stirring cavity plate on both sides of the cavity shaft, and each side plate surface has a plurality of second electrically controlled magnetic blocks arranged horizontally and equidistantly, and each second electrically controlled magnetic block is equipped with an independent electrically controlled switch, and the magnetic attraction end of the second electrically controlled magnetic block acts on the outside through the stirring cavity plate. Air supply valve blocks are fixedly installed at both ends of the cavity shaft, and the output end of the air supply valve block is equipped with a branch pipe extending from both ends of the cavity shaft. The inner wall of the metal ring sleeve is provided with an injection port through which the output end branch pipe of the air supply valve block passes, and the output end branch pipe passes through the injection port and is sealed to the input end of the ring airbag.

[0014] As a further aspect of the present invention: the alloy powder pressing cylinder module includes a through-hole mold cylinder, the upper and lower ends of which are open, and a circular sealing sleeve is fixedly connected at the upper and lower ends of the through-hole mold cylinder. A circular notch is opened on the outer edge of each circular sealing sleeve, and a sealing circular gasket is fixedly connected at both sides of the circular notch. A plurality of first permeation holes leading to the interior of the through-hole mold cylinder are arranged circumferentially at equal intervals on the circular notch. A second servo motor is fixedly installed at the bottom edge of the circular base partition frame, and a gear main drive disk, which is integrally placed on the upper surface of the circular base partition frame, is fixedly installed on the output end of the second servo motor.

[0015] As a further embodiment of the present invention: the ring drive reconfiguration mechanism includes a slave drive base module attached to the center of the upper surface of the ring base partition frame, and a ring drive module sleeved on the outside of the through mold cylinder. The slave drive base module includes a gear ring sleeve, which meshes with the gear master drive disk. The gear ring sleeve has an annular cavity inside, and an embedded ring sleeve is fixedly installed inside the annular cavity. Two symmetrically arranged partition sealing frames are fixedly connected to the outer edge of the embedded ring sleeve, and the inner cavity of the annular cavity is divided into two independent cavity areas by the partition sealing frames. A corresponding second riser is fixedly connected to the upper surface of each independent cavity area on the upper surface of the gear ring sleeve.

[0016] As a further aspect of the present invention: the driven base module further includes an adsorption pump fixedly connected to the outer edge of the embedded annular sleeve at the middle end of the two separating sealing frames. The embedded annular sleeve is cut off as a whole by the adsorption pump to form a symmetrical and independent state on both sides. The bottom of each adsorption pump is sealed and protrudes from the bottom surface of the gear annular sleeve to adsorb external gas. The output end of each adsorption pump faces the center end of the gear annular sleeve. The side wall of the gear annular sleeve is provided with a first reserved opening for the adsorption pump output end to function. A micro-transfer pump is fixedly installed inside each separating sealing frame. Each micro-transfer pump is fixedly installed with an extraction valve pipe extending into the annular cavity on both sides of the separating sealing frame. The delivery end of each micro-transfer pump is connected to the inner cavity of the embedded annular sleeve. The upper surface of the embedded annular sleeve is connected to the micro-transfer pump on both sides with a first vertical pipe. The first vertical pipe and the second vertical pipe extend upward in a vertical state.

[0017] As a further aspect of the present invention: the ring drive module includes a cylindrical component frame fixedly connected to the upper surface of the gear ring sleeve, and a first ring cavity and a second ring cavity are fixedly connected at the upper and lower ends of the cylindrical component frame, respectively. An integral first ring protrusion is fixedly connected to the surface of the first ring cavity, and the first ring protrusion is sealed and assembled in the circular groove on the upper side of the through mold cylinder. An integral second ring protrusion is fixedly connected to the surface of the second ring cavity, and the second ring protrusion is sealed and assembled in the circular groove on the lower side of the through mold cylinder. The second ring cavity and the first ring cavity are independent of each other, and two symmetrical second reserved through ports are opened on the outer edge of the second ring cavity, and the second reserved through ports are mated and assembled with the first reserved through ports.

[0018] As a further aspect of the present invention: the ring drive module further includes linear drive motors fixedly installed at symmetrical positions on both sides of the cylindrical component frame in a vertically arranged state. Each linear drive motor has a first electrically controlled magnetic block fixedly installed on its linear output end. The output end of the first electrically controlled magnetic block is an arc shape attached to the outer surface of the through-hole mold cylinder. Side through-cavity sleeves are fixedly installed on both sides of the linear drive motor. The top of the side through-cavity sleeve communicates with the inside of the first annular cavity, and the bottom of the side through-cavity sleeve is connected to the first vertical tube. An external expansion frame is fixedly installed on the outer surface of the linear drive motor, and a reagent storage cylinder corresponding to the second vertical tube is fixedly installed in each side of the external expansion frame.

[0019] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0020] (1) This scheme uses the magnetic coupling of the centrifugal remixing mechanism and the ring drive remixing mechanism to directly intervene in the alloy powder after blanking in the mold cavity. Unlike the existing technology that only relies on premixing outside the mold, this scheme can redistribute the particles inside the mold cavity before pressing. By using rotary stirring and selective adsorption based on real-time magnetic detection, it actively overcomes the stratification trend that has occurred between heavy NdFeB powder and light graphene powder after blanking and stacking. This allows the powder to recover and maintain a highly uniform distribution state before densification, thereby ensuring the consistency of the internal composition of the pressed blank and improving the qualification rate of sintered products.

[0021] (2) By providing external non-contact magnetic driving force through the ring drive remixing mechanism, the internal centrifugal remixing mechanism is rotated, avoiding the wear and contamination risks caused by the traditional mechanical transmission shaft seal. At the same time, the magnetic detection probe and the second electrically controlled magnetic block configured on the stirring cavity plate form a dynamic feedback loop, which can adjust the magnetic field strength of a specific area according to the real-time detection result of the powder accumulation amount, adsorb the excessively accumulated magnetic particles and carry them to the area with less accumulation amount with the rotation and then release them, so as to achieve precise intervention on the migration path of different magnetic components in the alloy powder and ensure the uniformity of the microstructure of the billet.

[0022] (3) By using the circular airbag on the outer edge of the metal ring to move along the inner wall of the mold under magnetic drive, the exudated release agent is evenly pressed onto the inner wall by the extrusion coating method. Compared with the top-down spraying method, the coating is more uniform and has stronger adhesion. At the same time, the airflow generated by the bottom adsorption pump accelerates the drying of the coating and removes the residual liquid, so that the inner wall of the mold forms a clean release interface before the powder is stirred. Attached Figure Description

[0023] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the hydraulic support column of the present invention;

[0026] Figure 3 This is a schematic diagram of the pressing mechanism of the present invention in a semi-sectional state;

[0027] Figure 4 This is a schematic diagram of the centrifugal remixing mechanism of the present invention in its disassembled state;

[0028] Figure 5 This is a schematic diagram of the alloy powder pressing cylinder module of the present invention in a disassembled state;

[0029] Figure 6 This is a schematic diagram of the overall structure of the ring drive reconfiguration mechanism of the present invention;

[0030] Figure 7 for Figure 5 An enlarged schematic diagram of point A in the middle;

[0031] Figure 8 This is a structural diagram of the present invention in its disassembled state from the drive base module;

[0032] Figure 9 This is a schematic diagram of the ring drive module of the present invention.

[0033] The attached figures are labeled as follows:

[0034] 1. Base bracket; 2. Hydraulic support column; 3. Platform partition; 4. Pressure testing mold head;

[0035] 5. Pressing mechanism; 51. Hollow cylinder; 52. Circular support plate; 53. Bearing sleeve; 54. Winding cavity disc; 55. First servo motor; 56. Traction wire; 57. Separating cavity plate; 58. Powder storage cavity; 59. Drainage conduit; 510. Supplementary conduit; 511. Assembly threaded sleeve;

[0036] 6. Circular base partition frame;

[0037] 7. Alloy powder pressing cylinder module; 71. Through-hole mold cylinder; 72. Circular sealing sleeve; 73. Circular notch groove; 74. Sealing circular ring gasket; 75. First penetration hole;

[0038] 8. Hydraulic base rod;

[0039] 9. Ring drive reconfiguration mechanism;

[0040] 91. Drive base module; 911. Gear ring sleeve; 912. Ring cavity; 913. Embedded ring sleeve; 914. Separating sealing frame; 915. Miniature transfer pump; 916. Extraction valve pipe; 917. Adsorption pump; 918. First reserved opening; 919. First riser; 9110. Second riser;

[0041] 92. Ring drive module; 921. Cylindrical component frame; 922. First annular cavity; 923. First annular protrusion; 924. Second annular protrusion; 925. Second annular cavity; 926. Linear drive motor; 927. Side passage sleeve; 928. External expansion frame; 929. Reagent storage cylinder; 9210. Second reserved opening; 9211. First electrically controlled magnetic suction block;

[0042] 10. Centrifugal remixing mechanism; 101. Metal ring sleeve; 102. Ring airbag; 103. Stirring cavity plate; 104. Cavity shaft rod; 105. Magnetic detection probe; 106. Moving head; 107. Air supply valve block; 108. Side plate; 109. Injection port;

[0043] 11. Pressing die block; 12. External hose; 13. Second electrically controlled magnetic suction block; 14. Second servo motor; 15. Gear main drive disk.

[0044] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0045] The neodymium iron boron forming apparatus provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can also use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0046] like Figures 1 to 9 As shown, this embodiment of the invention provides a neodymium iron boron forming device, including a base support 1. A vertically arranged hydraulic support column 2 is fixedly connected to the upper surface of the base support 1, and a platform partition 3 is fixedly connected to the top telescopic end of the hydraulic support column 2. A pressure detection die head 4 is fixedly installed at the bottom midpoint of the platform partition 3, and a pressing mechanism 5 for pressing and distributing alloy powder is arranged on the bottom surface of the pressure detection die head 4.

[0047] The upper surface of the base support 1 is fixedly connected to a circular base partition frame 6 with a circular opening, and the upper surface of the circular base partition frame 6 is equipped with an alloy powder pressing cylinder module 7 located at the bottom of the pressing mechanism 5, and a ring drive reconfiguration mechanism 9 is movably configured outside the alloy powder pressing cylinder module 7.

[0048] The alloy powder pressing cylinder module 7 is equipped with a centrifugal remixing mechanism 10 that is magnetically attracted to the externally configured ring-driven remixing mechanism 9. The centrifugal remixing mechanism 10 includes a metal ring sleeve 101 and a stirring cavity plate 103 on the inner wall of the metal ring sleeve 101. A number of magnetic detection probes 105 and a second electrically controlled magnetic block 13 are also arranged on the stirring cavity plate 103 at equal intervals to cooperate with the ring-driven rotation of the ring-driven remixing mechanism 9 to perform secondary adsorption and homogenization of the alloy particles in the mixed powder discharged from the pressing mechanism 5.

[0049] To address the issue of compositional segregation caused by differences in particle magnetic properties in the alloy powder during existing NdFeB molding processes, the above-mentioned technical solution is adopted. This solution mainly consists of a base support 1, hydraulic support columns 2, platform partitions 3, pressure detection molds 4, a pressing mechanism 5, a circular base partition frame 6, an alloy powder pressing cylinder module 7, a ring-driven remixing mechanism 9, and a centrifugal remixing mechanism 10. The base support 1 serves as the fundamental support structure of the entire device and is constructed entirely of high-strength, rigid materials to ensure structural stability under high-pressure operation. The hydraulic support columns 2 are vertically fixed to both ends of the upper surface of the base support 1, and both extend and retract synchronously. Their top extension ends are fixedly connected to the platform partitions 3. The vertical displacement of the platform partitions 3 is achieved by controlling the hydraulic system, providing pressure for the pressing process. The pressure detection mold 4, located at the bottom center of the platform partitions 3, integrates a high-precision pressure sensor, enabling real-time monitoring of the applied pressure during pressing to ensure the pressing parameters are maintained during operation.

[0050] Specifically, the pressing mechanism 5 is positioned on the bottom surface of the pressure detection mold head 4. On one hand, it works in conjunction with the hydraulic support column 2 and the vertical downward pressing of the pressure detection mold head 4 to perform the pressing and forming process. On the other hand, it is also used for alloy powder distribution. Through its internal flow channel structure, it ensures that the alloy powder is evenly distributed within the cavity of the alloy powder pressing cylinder module 7 before pressing. The circular base partition frame 6 is fixedly connected to the upper surface of the base support 1. Its central opening is flush with the alloy powder pressing cylinder module 7, ensuring alignment between the pressing mechanism 5 and the alloy powder pressing cylinder module 7. The alloy powder pressing cylinder module 7 is positioned on the upper surface of the circular base partition frame 6, directly below the pressing mechanism 5. Its internal cavity is used to contain and form NdFeB alloy powder. The externally movable ring-driven remixing mechanism 9 achieves rotational motion through a transmission end, providing a contactless driving force for the internal centrifugal remixing mechanism 10.

[0051] The centrifugal remixing mechanism 10 is located inside the alloy powder pressing cylinder module 7. It includes a metal ring sleeve 101 and a stirring cavity plate 103 fixedly connected to the inner wall of the metal ring sleeve 101. The metal ring sleeve 101 is made of a high magnetic permeability material in the prior art and forms a magnetic coupling relationship with the external ring drive remixing mechanism 9. The rotational motion of the ring drive remixing mechanism 9 drives the centrifugal remixing mechanism 10 to rotate as a whole. Several magnetic detectors 105 and second electrically controlled magnetic blocks 13 are equidistantly arranged on the stirring cavity plate 103. The magnetic detectors 105 are used to detect the distribution of different magnetic particles in the alloy powder in real time. The second electrically controlled magnetic blocks 13 generate a magnetic field that can attract alloy particles based on the detection results. This allows for secondary selective adsorption of alloy particles in the mixed powder discharged from the pressing mechanism 5, redistributing the distribution of alloy particles during the rotational stirring process and promoting further uniform mixing of the powder. Specifically, during operation, the synergistic effect of centrifugal force and magnetic force overcomes the component segregation phenomenon caused by differences in particle density and magnetic properties during traditional pressing, ensuring that the pressed NdFeB billet has a highly uniform microstructure and excellent physical properties. The magnetic interaction between the ring-driven remixing mechanism 9 and the centrifugal remixing mechanism 10 achieves contactless power transmission, avoiding the pollution and wear problems that may be caused by traditional mechanical transmission structures. At the same time, the real-time feedback from the magnetic detectors 105 and the mutual regulation of the second electrically controlled magnetic blocks 13 enable overall control of the alloy powder mixing process.

[0052] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the pressing mechanism 5 includes a cavity pressing cylinder 51 fixedly assembled on the bottom detection end of the pressure detection mold head 4. A partition plate 57 is fixedly installed at the middle position inside the cavity pressing cylinder 51. Two powder storage chambers 58 arranged symmetrically are fixedly installed on the top of the partition plate 57. A circular support plate 52 is fixedly connected to the bottom of the partition plate 57, and a bearing sleeve 53 is movably installed through the circular support plate 52. A winding cavity disk 54 is fixedly installed on the bearing sleeve 53. A first servo motor 55 with its output end connected to its winding shaft is fixedly installed on the side wall of the winding cavity disk 54. A traction wire 56 extending from the center position of the bearing sleeve 53 is wound on the winding shaft to control the traction state of the traction wire 56 in coordination with the forward and reverse rotation of the winding shaft connected to the output end of the first servo motor 55. The centrifugal remixing mechanism 10 is configured on the end of the traction wire 56 to extend into the alloy powder pressing cylinder module 7 directly opposite the bottom.

[0053] The cavity pressure cylinder 51 serves as the main structure of the pressing mechanism 5. Its upper end is fixedly connected to the bottom detection end of the pressure detection die 4, ensuring that the pressing parameters of the cavity pressure cylinder 51 during the pressing process can be directly detected by the pressure detection die 4, facilitating direct control of the pressing effect. The cavity pressure cylinder 51 has a hollow structure inside, with a partition plate 57 fixedly installed in its middle position. On the top of the partition plate 57, two powder storage chambers 58 are symmetrically fixedly installed, which are used to pre-store neodymium iron boron alloy powder and graphene powder, respectively. At the bottom of the partition plate 57, a circular support plate 52 is fixedly connected. The circular support plate 52 has a ring structure with a through hole in its center for installing a bearing sleeve 53, allowing the bearing sleeve 53 to rotate freely in the horizontal plane while maintaining stable support in the vertical direction. On the upper surface of the bearing sleeve 53, a winding cavity disk 54 is fixedly installed. The winding cavity disk 54 has a winding chamber inside, which is used to accommodate and guide the movement trajectory of the traction wire 56. A first servo motor 55 is fixedly installed on the side wall of the winding cavity disk 54. The output end of the first servo motor 55 is connected to the winding shaft, which is located inside the winding cavity disk 54. A traction wire 56 is wound on it. The end of the traction wire 56 extends vertically downward from the center of the bearing sleeve disk 53 and is connected to the overall structure of the centrifugal remixing mechanism 10.

[0054] During operation, the hydraulic support column 2 is hydraulically controlled to drive the output platform partition 3 to press down vertically until the cavity pressure cylinder 51 at the bottom of the pressure detection mold head 4 at the bottom of the platform partition 3 is fully fitted onto the top of the alloy powder pressing cylinder module 7. Correspondingly, the hydraulic base rod 8 extends vertically upward until its bottom extends into the bottom of the alloy powder pressing cylinder module 7, forming a temporary sealed base at the bottom of the alloy powder pressing cylinder module 7. Then, according to the production requirements, the corresponding amount of powder particles are discharged downward from the top of the alloy powder pressing cylinder module 7 through the two powder storage chambers 58 for subsequent processing. Meanwhile, the output end of the first servo motor 55 drives the winding shaft to rotate in both directions, thereby controlling the winding and unwinding state of the traction wire 56 and realizing the lifting and lowering control of the centrifugal remixing mechanism 10. The centrifugal remixing mechanism 10, pulled by the traction wire 56, can extend into the alloy powder pressing cylinder module 7 directly opposite the bottom to perform the secondary homogenization function of the alloy powder. Furthermore, since the bearing sleeve 53 is installed in a movable manner, during the traction process of the traction wire 56, the bearing sleeve 53 can automatically adjust its position according to the motion state of the centrifugal remixing mechanism 10. Its rotational freedom ensures that the bearing sleeve 53 will not interfere with the rotation of the centrifugal remixing mechanism 10 when the centrifugal remixing mechanism 10 is performing rotational mixing operation. At the same time, the flexibility of the traction wire 56 also ensures that no torque transmission will occur during the rotation of the centrifugal remixing mechanism 10, ensuring that the centrifugal remixing mechanism 10 can independently and stably perform its mixing function without being mechanically constrained by the upper pressing mechanism 5.

[0055] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the bottom of the cavity pressure cylinder 51 is open, and there is a space between the open end and the bottom of the annular support plate 52 to accommodate the centrifugal remixing mechanism 10 that is pulled up by the traction wire 56. An assembly threaded sleeve 511 is fixedly connected to the side wall of the open end, and a pressing die block 11 is rotatably installed through the assembly threaded sleeve 511. The bottom of each powder storage cavity 58 is fixedly connected to a drainage conduit 59, and the bottom of the drainage conduit 59 extends out from the two side edges of the annular support plate 52. The top of each powder storage cavity 58 is fixedly installed with a supplementary conduit 510, and the end of each supplementary conduit 510 is connected to an external hose 12 for connecting to an external feeding end. A hydraulic base rod 8 for extending into the alloy powder pressing cylinder module 7 is fixedly installed through the round opening on the surface of the annular base partition frame 6 at the middle position of the upper surface of the base bracket 1.

[0056] The cavity cylinder 51 features an open bottom design to house the centrifugal remixing mechanism 10, which is lifted when the traction wire 56 is retracted, ensuring that the centrifugal remixing mechanism 10 can be stored inside the cavity cylinder 51 when not in operation. An assembly threaded sleeve 511 is fixedly connected to the side wall of the open end of the cavity cylinder 51, and a pressing die block 11 is rotatably mounted via a threaded connection. The pressing die block 11 can be quickly replaced according to the requirements of different specifications of NdFeB products. In the two powder storage chambers 58 located at the top of the partition plate 57, each powder storage chamber 58 has a drainage conduit 59 fixedly connected to its bottom, with its bottom extending from the two side edges of the annular support plate 52, ensuring that alloy powder can flow from the powder storage chamber 58 into the alloy powder pressing cylinder module 7 below through the drainage conduit 59. Meanwhile, a replenishment conduit 510 is fixedly installed on the top of each powder storage chamber 58. The end of the replenishment conduit 510 is connected to an external hose 12, which is made of flexible and pressure-resistant material and is used to connect to an external feeding system to achieve continuous replenishment of alloy powder. At the middle position of the upper surface of the base bracket 1, a hydraulic base rod 8 is fixedly installed through a circular opening on the surface of the annular base partition frame 6. The output end of the hydraulic base rod 8 is vertically upward and is equipped with a pad to block the bottom opening of the alloy powder pressing cylinder module 7. During operation, it can extend into the bottom of the alloy powder pressing cylinder module 7 and cooperate with the pressing mechanism 5 above to provide bottom support force during the pressing process, ensuring the uniformity of the pressing density and the integrity of the blank.

[0057] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the centrifugal remixing mechanism 10 also includes a circular airbag 102 fixedly installed on the outer edge of a metal ring sleeve 101. A stirring cavity plate 103 forming the diameter end is fixedly connected to the inner wall of the metal ring sleeve 101. The stirring cavity plate 103 is generally inclined and sprays water. A cavity shaft rod 104 is horizontally connected at the middle position inside. A movable head 106 is fixedly installed at the middle position of the top of the cavity shaft rod 104. The movable head 106 is a double-layer embedded movable sleeve structure. The movable end of the movable sleeve is fixedly connected to the end of the traction wire 56. Several horizontally arranged magnetic detection probes 105 are fixedly installed at equal intervals on the surface of the cavity shaft rod 104. The magnetic detection end of each magnetic detection probe 105 detects the amount of metal particles accumulated outside in real time through the stirring cavity plate 103.

[0058] The circular airbag 102, fixedly mounted on the outer edge of the metal ring sleeve 101, is made of a high-pressure resistant and wear-resistant elastic material, as is available in the prior art. It can achieve a tight fit with the inner wall of the alloy powder pressing cylinder module 7 through inflation during operation. Furthermore, the outer surface of the fitting end has an absorbent coating, including but not limited to modified sponge coatings and water-absorbing soft rubber coatings, as is available in the prior art. The function of achieving a tight fit with the inner wall of the alloy powder pressing cylinder module 7 through inflation is to ensure that the inner wall of the through-hole mold cylinder 71 is protected from the first... The reagent permeating through the permeation hole 75 is used for coating. Specifically, when the release agent permeates through the first permeation hole 75 at the top of the mold cylinder 71, the ring drive re-mixing mechanism 9 uses magnetic attraction to control the metal ring sleeve 101, moving it downwards from the top of the mold cylinder 71. The downward force, adhering to the inner wall of the mold cylinder 71, compresses and coats the release agent permeating from the top onto the entire inner wall of the mold cylinder 71. This method differs from the existing coating method using a spray bottle to spray from the top, allowing for more efficient and compacted coating of the release agent. A stirring cavity plate 103, forming the diameter end, is fixedly connected to the inner wall of the metal ring sleeve 101. This stirring cavity plate 103 is inclined at a certain angle from the center to the outer edge, generating a combined effect of centrifugal force and gravity during rotation, promoting uniform distribution and thorough mixing of the alloy powder.

[0059] A hollow shaft rod 104 is horizontally connected to the center of the mixing cavity plate 103. The hollow shaft rod 104 has a hollow center. A movable head 106 is fixedly installed at the top center of the hollow shaft rod 104. The movable head 106 adopts a double-layer embedded movable block structure, which allows the inner block to rotate freely. This ensures that the movable head 106 can smoothly transmit traction force when the traction wire 56 is retracted or extended, without interfering with the rotational movement of the centrifugal remixing mechanism 10. Several horizontally arranged magnetic detection probes 105 are fixedly installed at equal intervals on the surface of the hollow shaft rod 104. These magnetic detection probes 105 are made of high-sensitivity magnetoresistive sensors in the prior art. The magnetic detection end of each magnetic detection probe 105 is used to detect the amount of metal particles accumulated on the outside through the side wall of the mixing cavity plate 103 in real time, realizing real-time monitoring of the distribution state of different magnetic particles in the alloy powder.

[0060] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the centrifugal remixing mechanism 10 also includes side plates 108 fixedly installed inside the stirring cavity plate 103 on both sides of the cavity shaft rod 104. Each side plate 108 has several second electrically controlled magnetic blocks 13 arranged horizontally and equidistantly on its surface. Each second electrically controlled magnetic block 13 is equipped with an independent electrically controlled switch. The magnetic attraction end of the second electrically controlled magnetic block 13 acts on the outside through the stirring cavity plate 103. Air supply valve blocks 107 are fixedly installed at both ends of the cavity shaft rod 104. The output end of the air supply valve block 107 is equipped with a branch pipe extending from both ends of the cavity shaft rod 104. The inner wall of the metal ring sleeve 101 is provided with an injection port 109 through which the branch pipe of the output end of the air supply valve block 107 passes. The branch pipe of the output end passes through the injection port 109 and is sealed to the input end of the ring airbag 102.

[0061] The fixedly installed side plate 108 is made of non-magnetic high-strength material in the prior art. Several second electrically controlled magnetic blocks 13 are arranged horizontally and equidistantly on its surface. These second electrically controlled magnetic blocks 13 are all electromagnetic coil structures that can work independently in the prior art. Each second electrically controlled magnetic block 13 is equipped with an independent electric control switch, so that the control system can control each second electrically controlled magnetic block 13 individually according to the real-time detection data of the magnetic detection probe 105, realize the adjustment of the magnetic field strength, and ensure that the magnetic field can directly act on the magnetic particles in the alloy powder. At both ends of the hollow shaft 104, air supply valve blocks 107 are fixedly installed. These air supply valve blocks 107 employ a micro pneumatic control valve design from the prior art. Each air supply valve block 107 has a branch pipe extending from both ends of the hollow shaft 104 at its output end. These branch pipes are made of high-pressure resistant flexible material, possessing excellent bending and sealing properties. Injection ports 109 are provided on the inner wall of the metal annular sleeve 101, through which the branch pipes of the air supply valve blocks 107 pass. The positions of these injection ports 109 correspond to the outlet positions of the branch pipes of the air supply valve blocks 107, ensuring smooth passage of the branch pipes. After passing through the injection ports 109, the branch pipes at the output end of the air supply valve blocks 107 form a sealed connection with the input end of the annular airbag 102. Controlling the air supply valve blocks 107 allows for inflation and deflation control of the annular airbag 102, thereby adjusting its inflation level.

[0062] During the operation of the centrifugal remixing mechanism 10, the metal ring sleeve 101, as a rotating ring structure, drives the stirring cavity plate 103 fixedly connected to its inner wall to rotate synchronously. Since the stirring cavity plate 103 forms the diameter end, it can sweep across the entire circular plane area during rotation, covering the entire two-dimensional plane space inside the alloy powder pressing cylinder module 7. On the side plates 108 on both sides inside the stirring cavity plate 103, several second electrically controlled magnetic blocks 13 are arranged horizontally at equal intervals and are precisely controlled by independent electrically controlled switches. At the same time, the magnetic detection probe 105 detects the amount of external metal particles in real time and feeds the data back to the control system. When an abnormal amount of alloy powder accumulation is detected in a certain area, the control system will activate the second electrically controlled magnetic block 13 located at the position corresponding to the sweep radius, so that it generates a magnetic field of a specific intensity. Through the stirring cavity plate 103, it acts on the alloy powder on the outside, adsorbing the excessively accumulated magnetic particles to the surface of the stirring cavity plate 103. As the metal ring sleeve 101 continues to rotate, these adsorbed particles are carried to the area with less accumulation on one hand, and continue to be adsorbed on the surface of the stirring cavity plate 103 on the other hand. The excessively accumulated magnetic particles in the previous area are redistributed. Furthermore, for the alloy powder particles that continue to be adsorbed on the surface of the stirring cavity plate 103, the control system reduces the magnetic strength of the second electrically controlled magnetic block 13 at the corresponding position, so that the adsorbed particles are released and redistributed under the action of centrifugal force and gravity.

[0063] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the alloy powder pressing cylinder module 7 includes a through mold cylinder 71. The upper and lower ends of the through mold cylinder 71 are open, and a circular sealing sleeve 72 is fixedly connected to the upper and lower ends of the through mold cylinder 71. A circular notch 73 is opened on the outer edge of each circular sealing sleeve 72, and a sealing circular gasket 74 is fixedly connected to the two sides of the circular notch 73. A plurality of first penetration holes 75 leading to the interior of the through mold cylinder 71 are opened in a circular notch 73 at equal intervals. A second servo motor 14 is fixedly installed at the bottom edge of the circular base partition frame 6. A gear main drive disk 15, which is integrally placed on the upper surface of the circular base partition frame 6, is fixedly installed on the output end of the second servo motor 14.

[0064] The configured through-hole mold cylinder 71 is cylindrical in shape, with open ends to facilitate powder injection from the upper pressing mechanism 5 and support from the lower hydraulic base rod 8. Circular sealing sleeves 72 are fixedly connected to the upper and lower ends of the through-hole mold cylinder 71, each with a precisely formed circular notch 73 on its outer edge. The circular notch 73 has an annular concave cross-section for sealing with the corresponding structure of the ring drive refitting mechanism 9. Sealing ring gaskets 74 are fixedly connected to both sides of the circular notch 73. These sealing ring gaskets 74 are made of high-temperature resistant and wear-resistant elastic sealing material, forming an effective sealing interface during the pressing process of the ring drive refitting mechanism 9. On the circular notch 73, a number of first penetration holes 75 are arranged equidistantly in a circle. These first penetration holes 75 are evenly distributed on the entire circumference of the circular notch 73. Each first penetration hole 75 leads to the inside of the through mold cylinder 71. During the working process, the demolding reagent and surface treatment agent stored in the ring drive re-mixing mechanism 9 are penetrated to the inner wall surface of the through mold cylinder 71 to form a uniform coating, reduce the frictional resistance between the alloy powder and the inner wall of the mold during the pressing process, and improve the demolding efficiency and the surface quality of the blank.

[0065] A second servo motor 14 is fixedly installed at the bottom edge of the circular base partition frame 6. A gear main drive disk 15 is fixedly installed on its output end. The gear main drive disk 15 is placed on the upper surface of the circular base partition frame 6 and meshes with the gear ring sleeve 911 in the ring drive remixing mechanism 9. The gear main drive disk 15 can be rotated by the control of the second servo motor 14, thereby driving the entire ring drive remixing mechanism 9 to perform circular motion, providing contactless driving force for the internal centrifugal remixing mechanism 10.

[0066] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the ring drive reconfiguration mechanism 9 includes a slave drive base module 91 attached to the center of the upper surface of the ring base partition frame 6, and a ring drive module 92 sleeved on the outside of the through mold cylinder 71. The slave drive base module 91 includes a gear ring sleeve 911, which meshes with the gear master drive disk 15. The gear ring sleeve 911 has an annular cavity 912 inside, and an embedded ring sleeve 913 is fixedly installed inside the annular cavity 912. Two symmetrically arranged partition sealing frames 914 are fixedly connected to the outer edge of the embedded ring sleeve 913, and the inner cavity of the annular cavity 912 is divided into two independent cavity areas by the partition sealing frames 914. A corresponding second riser 9110 is fixedly connected to the upper surface of each independent cavity area on the upper surface of the gear ring sleeve 911.

[0067] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the driven base module 91 also includes an adsorption pump 917 fixedly connected to the outer edge of the embedded circular sleeve 913 at the middle end of the two separating sealing frames 914. The adsorption pump 917 cuts the embedded circular sleeve 913 into two symmetrical and independent states. The bottom of each adsorption pump 917 is sealed and protrudes through the bottom surface of the gear ring sleeve 911 to adsorb external gas. The output end of each adsorption pump 917 faces the center end of the gear ring sleeve 911, and the side wall of the gear ring sleeve 911 is provided with a port for the adsorption pump 917. The first reserved opening 918 for the output end is fixedly installed inside the partition sealing frame 914. The micro transfer pump 915 is fixedly installed inside the partition sealing frame 914. The micro transfer pump 915 is fixedly installed with extraction valve pipe 916 extending to the annular cavity 912 on both sides of the partition sealing frame 914. The delivery end of the micro transfer pump 915 is connected to the inner cavity of the embedded annular sleeve 913. The upper surface of the embedded annular sleeve 913 is connected to the first riser 919 on both sides of the micro transfer pump 915. The first riser 919 and the second riser 9110 extend upward in a vertical state.

[0068] The configured slave base module 91 has an overall ring-shaped structure and is fitted to the center of the upper surface of the ring base partition frame 6. The main structure of the gear ring sleeve 911 is made of high-strength alloy material and meshes with the gear master drive disk 15 fixed on the output end of the second servo motor 14 at the bottom edge of the ring base partition frame 6. Under the control of the second servo motor 14, the gear ring sleeve 911 is driven to perform a stable ring rotation, providing basic driving force for the entire ring drive reconfiguration mechanism 9.

[0069] Inside the gear ring sleeve 911, a complete annular cavity 912 is formed. This annular cavity 912 has a hollow ring structure and is distributed around the entire circumference of the gear ring sleeve 911. Inside the annular cavity 912, an inner ring sleeve 913 is also annular, with its outer diameter slightly smaller than the inner diameter of the annular cavity 912, forming an annular gap for reagent flow. On the outer edge of the inner ring sleeve 913, two separating sealing frames 914 are symmetrically fixedly connected. These two separating sealing frames 914 have a radially extending plate-like structure, dividing the inner cavity of the annular cavity 912 into two independent cavity areas on the left and right sides, ensuring that the two different reagents can be completely isolated before mixing. On the upper surface of the gear ring sleeve 911, at the position on the upper surface of each independent cavity area, a corresponding second riser 9110 is fixedly connected to introduce the demolding reagent and activating reagent in the external reagent storage cylinder 929 into the corresponding cavity areas.

[0070] An adsorption pump 917 is fixedly connected to the outer edge of the embedded circular sleeve 913 at the middle position of the two separating sealing frames 914. The adsorption pump 917 adopts a micro vacuum pump structure. Through its installation position, the embedded circular sleeve 913 is completely cut off to form a symmetrical and independent state on both sides, ensuring complete isolation of the reagent flow paths on both sides. Each adsorption pump 917 has its bottom sealed through the bottom surface of the gear ring sleeve 911 via a sealing joint to adsorb external gas. Therefore, a gasket can be provided between the bottom surface of the gear ring sleeve 911 and the upper surface of the ring base partition 6 to raise the gear ring sleeve 911 to facilitate gas flow. The output end of each adsorption pump 917 faces the center end of the gear ring sleeve 911. On the side wall of the gear ring sleeve 911, a first reserved opening 918 is provided for the output end of the adsorption pump 917. These first reserved openings 918 are connected and assembled with the second reserved openings 9210 opened on the outer edge of the second ring cavity 925 in the ring drive module 92 to form a complete gas flow channel.

[0071] Inside each of the partition seals 914, a miniature transfer pump 915 is fixedly installed. Each miniature transfer pump 915 is fixedly installed with an extraction valve tube 916 extending into the annular cavities 912 on both sides of the partition seal 914. The ends of the extraction valve tubes 916 extend into the independent cavity areas on both sides to extract the corresponding reagents. The delivery ends of the miniature transfer pumps 915 are connected to the inner cavity of the embedded annular sleeve 913 through pipes, so that the demolding reagent and the activating reagent in the independent cavity areas on both sides are extracted into the inner cavity of the embedded annular sleeve 913 for mixing. On the upper surface of the embedded circular sleeve 913, on both sides of the micro-pump 915, there are first risers 919 connected in a vertical manner. These first risers 919 and second risers 9110 extend upwards in a vertical state. The top of the first riser 919 is connected to the bottom of the side passage sleeve 927 fixedly installed on both sides of the linear drive motor 926 in the ring drive module 92, which is used to transport the mixed reagent into the first circular cavity 922, and finally spray it onto the inner wall surface of the through mold cylinder 71 through the first permeation hole 75 on the upper circular notch groove 73.

[0072] The negative pressure generated by the adsorption pump 917 from the drive base module 91 acts on the round notch 73 and the first permeation hole 75 on the lower side of the through mold cylinder 71 through the docking channel of the first reserved through port 918 and the second reserved through port 9210, forming a self-flowing airflow to accelerate the drying process of the release agent inside the through mold cylinder 71, while adsorbing away excess reagent residue, creating a dry and clean inner wall environment for the subsequent powder pressing process.

[0073] During operation, two partitioned sealing frames 914 divide the annular cavity 912 into independent areas, which are used to store the release agent and the activation agent, respectively. Under the action of the micro-pump 915, the two agents are metered and transported through the extraction valve tube 916 into the inner cavity of the embedded annular sleeve 913 for mixing. The mixed agent is transported upward through the first riser 919, enters the first annular cavity 922 through the side passage sleeve 927, and finally is evenly sprayed onto the inner wall of the through mold cylinder 71 through the first permeation hole 75. During the rotation of the ring drive module 92, the mixed agent is fully activated in the annular cavity 912 by the action of centrifugal force and shear force, ensuring the best use effect of the agent. The sealing annular gasket 74 provides a sealing function during this process to prevent the agent from leaking.

[0074] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the ring drive module 92 includes a cylindrical component frame 921 fixedly connected to the upper surface of the gear ring sleeve 911. A first annular cavity 922 and a second annular cavity 925 are fixedly connected to the upper and lower ends of the cylindrical component frame 921, respectively. An integral first annular protrusion 923 is fixedly connected to the surface of the first annular cavity 922, and the first annular protrusion 923 is sealed and assembled in the circular groove 73 on the upper side of the through mold cylinder 71. An integral second annular protrusion 924 is fixedly connected to the surface of the second annular cavity 925, and the second annular protrusion 924 is sealed and assembled in the circular groove 73 on the lower side of the through mold cylinder 71. The second annular cavity 925 is independent of the first annular cavity 922, and two symmetrical second reserved through ports 9210 are opened on the outer edge of the second annular cavity 925. The second reserved through ports 9210 and the first reserved through ports 918 are assembled together.

[0075] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the ring drive module 92 also includes linear drive motors 926 arranged vertically at symmetrical positions on both sides of the cylindrical component frame 921. A first electrically controlled magnetic block 9211 is fixedly installed on the linear output end of each linear drive motor 926. The output end of the first electrically controlled magnetic block 9211 is an arc shape that is attached to the outer surface of the through mold cylinder 71. Side through cavity sleeves 927 are fixedly installed on both sides of the linear drive motor 926. The top of the side through cavity sleeve 927 communicates with the inside of the first annular cavity 922, and the bottom of the side through cavity sleeve 927 is connected to the first riser 919. An external expansion frame 928 is fixedly installed on the outer surface of the linear drive motor 926, and a reagent storage cylinder 929 corresponding to the second riser 9110 is fixedly installed in each side of the external expansion frame 928.

[0076] The configured ring drive module 92 has an overall cylindrical frame structure, which is fixedly connected to the upper surface of the gear ring sleeve 911 of the driven base module 91 via the cylindrical component frame 921, forming a complete ring drive end. The cylindrical component frame 921 is a hollow cylinder with internal reinforcing ribs to improve overall rigidity and stability. At the upper and lower ends of the cylindrical component frame 921, a first ring cavity 922 and a second ring cavity 925 are fixedly connected, respectively. Both of these ring cavities adopt a sealed design, forming independent annular liquid storage spaces inside.

[0077] The first annular cavity 922 is located at the upper end of the cylindrical component frame 921. An integrally formed first annular protrusion 923 is fixedly connected to its surface. The outer diameter of the first annular protrusion 923 matches the inner diameter of the circular notch 73 on the upper side of the through mold cylinder 71. When the ring drive module 92 is installed in place, the first annular protrusion 923 is completely sealed and assembled in the circular notch 73 on the upper side of the through mold cylinder 71. The outer surface of the first annular protrusion 923 is tightly fitted with the inner wall of the circular notch 73, forming a double sealing structure with the sealing annular gasket 74 to ensure that the reagent does not leak during the spraying process.

[0078] Similarly, the second annular cavity 925 is located at the lower end of the cylindrical component frame 921, and its surface is fixedly connected with an integrally formed second annular protrusion 924. The second annular protrusion 924 also mates with the circular notch 73 on the lower side of the through mold cylinder 71, and is sealed and assembled in the notch. The second annular cavity 925 and the first annular cavity 922 are structurally independent of each other, and a sealing partition is provided between them to ensure that the gas flow channel and the liquid flow channel are completely separated. On the outer edge of the second annular cavity 925, two second reserved openings 9210 are symmetrically opened. The positions of these two second reserved openings 9210 correspond to the first reserved opening 918 opened on the side wall of the gear annular sleeve 911. After the ring drive module 92 and the driven base module 91 are assembled, the second reserved openings 9210 and the first reserved openings 918 are connected to each other to form a flow channel for the negative pressure airflow generated by the adsorption pump 917 to pass through.

[0079] Two linear drive motors 926 are fixedly installed at symmetrical positions on both sides of the cylindrical component frame 921. These two linear drive motors 926 are arranged vertically and their installation positions are located in the radial direction of the cylindrical component frame 921. A first electrically controlled magnetic block 9211 is fixedly installed on the linear output end of each linear drive motor 926. The output end of the first electrically controlled magnetic block 9211 is an arc-shaped curved surface. The radius of curvature of the arc-shaped curved surface matches the curvature of the outer surface of the through mold cylinder 71, ensuring that the first electrically controlled magnetic block 9211 can fit against the outer surface of the through mold cylinder 71 and generate a uniform magnetic force distribution during operation, which is used to adsorb and control the metal ring sleeve 101 suspended inside the through mold cylinder 71.

[0080] Each linear drive motor 926 has a reagent storage cylinder 929 fixedly installed on its outer expansion frame 928. The two reagent storage cylinders 929 are respectively connected to the two second risers 9110 in the slave base module 91. One reagent storage cylinder 929 is used to store demolding reagent, and the other reagent storage cylinder 929 is used to store activation reagent. The two reagents flow into the two independent cavity areas on both sides of the slave base module 91 separated by the partition sealing frame 914 through the second riser 9110.

[0081] The ring drive module 92 controls the first electrically controlled magnetic block 9211 to move up and down via a linear drive motor 926, so as to attract and connect the metal ring sleeve 101 to move up and down along the inner wall of the through mold cylinder 71. On the one hand, it can provide driving force when the ring air bladder 102 expands and unfolds on the outer edge of the metal ring sleeve 101 to coat the reagent. On the other hand, when the metal ring sleeve 101 stirs the alloy powder inside, the gear main drive disk 15 at the output end of the second servo motor 14 drives the gear ring sleeve 911 to rotate, so that the linear drive motor 926 drives the metal ring sleeve 101 to move up and down while rotating, so that the metal ring sleeve 101 can rotate at high speed at any height position inside the through mold cylinder 71 for centrifugal stirring and mixing.

[0082] The usage method provided by this invention is as follows:

[0083] In use, the invention first opens the bottom of the cavity cylinder 51 by rotating the pressing die block 11. At the same time, neodymium iron boron alloy powder and graphene powder particles are added to the two powder storage chambers 58 through the external hose 12, and the corresponding demolding reagent and activating reagent are added to the reagent storage cylinders 929 on both sides. Then, the hydraulic support column 2 is activated, which drives the platform partition 3 to descend, so that the cavity cylinder 51 is sleeved on the top of the through mold cylinder 71. The hydraulic base rod 8 extends upward at the same time and enters the bottom of the through mold cylinder 71 for support and positioning.

[0084] The first servo motor 55 outputs a control to lower the traction wire 56 from the winding shaft inside the winding cavity disk 54, causing the centrifugal remixing mechanism 10 to be lowered into the through mold cylinder 71. At this time, the linear drive motor 926 controls its output to drive the first electrically controlled magnetic block 9211 to move upward, so that the first electrically controlled magnetic block 9211 forms a magnetic attraction connection with the metal ring sleeve 101 in the centrifugal remixing mechanism 10 through the through mold cylinder 71. Then, the two micro-pumps 915 in the drive base module 91 are started, and the release agent and the activation agent are extracted from the independent cavity areas on both sides of the ring cavity 912 through the extraction valve pipe 916, and delivered to the inner cavity of the embedded ring sleeve 913 for mixing and activation.

[0085] The mixed reagent flows into the side cavity sleeve 927 through the first riser 919 and finally enters the first annular cavity 922. In the first annular cavity 922, the mixed reagent is evenly seeped out through the first permeation hole 75 to the inner wall surface of the through mold cylinder 71. During this process, the first electrically controlled magnetic suction block 9211 drives the metal annular sleeve 101 to rotate and move up and down inside the through mold cylinder 71, so as to evenly coat the seeped reagent and ensure that a complete and uniform release coating is formed on the inner wall surface of the through mold cylinder 71.

[0086] At the same time, the adsorption pump 917 starts, and through the channel formed by the first reserved port 918 and the second reserved port 9210, it generates adsorption force on the first permeation hole 75 at the bottom of the port mold cylinder 71, which accelerates the drying process of the reagent on the inner wall surface and adsorbs away excess reagent residue.

[0087] Then, the neodymium iron boron alloy powder and graphene powder particles in the two powder storage chambers 58 are released into the through-hole mold cylinder 71 through the drainage conduit 59, forming a powder layer to be pressed on the treated inner wall surface. The second servo motor 14 starts, driving the gear main drive disk 15 to rotate. The gear main drive disk 15 meshes with the gear ring sleeve 911, driving the entire ring drive remixing mechanism 9 to rotate in a ring. During the rotation, the first electrically controlled magnetic suction block 9211 continuously attracts the metal ring sleeve 101, causing the centrifugal remixing mechanism 10 to perform centrifugal stirring motion inside the through-hole mold cylinder 71, uniformly mixing and distributing the released powder.

[0088] Through centrifugal stirring, the alloy powder forms a uniformly distributed blank structure inside the through mold cylinder 71, eliminating uneven powder accumulation or voids. Finally, the centrifugal remixing mechanism 10 is retracted upwards, and the platform partition 3 is lifted upwards under the drive of the hydraulic support column 2, exposing the bottom of the cavity pressure cylinder 51 again. At the same time, the pressing die block 11 rotates and resets.

[0089] The hydraulic support column 2 and the drainage conduit 59 work together to press the powder inside the through mold cylinder 71 layer by layer. After pressing, the annular sealing sleeve 72 on the upper side of the through mold cylinder 71 is opened, and the hydraulic base rod 8 is pushed upward to push the formed NdFeB product out of the through mold cylinder 71, completing a single production cycle.

[0090] If a layered pressing process is required, the product can be left unfinished after the first pressing. Instead, the pressed layer can be used as the bottom layer, and the above powder addition, mixing and pressing steps can be repeated. New powder layers can be stacked on the pressed layer and pressed again to finally form a multi-layered composite product that meets the special requirements of different application scenarios for the performance of NdFeB materials.

[0091] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0092] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A neodymium iron boron forming device, comprising a base support (1), wherein vertically arranged hydraulic support columns (2) are fixedly connected to the upper surface of the base support (1), and a platform partition (3) is fixedly connected to the top telescopic end of the hydraulic support columns (2), characterized in that: A pressure detection mold (4) is fixedly installed at the bottom midpoint of the platform partition (3), and a pressing mechanism (5) for pressing and distributing alloy powder is arranged on the bottom surface of the pressure detection mold (4). The upper surface of the base support (1) is fixedly connected to a circular base partition frame (6) with a circular opening, and the upper surface of the circular base partition frame (6) is provided with an alloy powder pressing cylinder module (7) located at the bottom of the pressing mechanism (5), and a ring drive re-fitting mechanism (9) is movably arranged outside the alloy powder pressing cylinder module (7). The alloy powder pressing cylinder module (7) is equipped with a centrifugal remixing mechanism (10) that is magnetically attracted to the externally configured ring-driven remixing mechanism (9). The centrifugal remixing mechanism (10) includes a metal ring sleeve (101) and a stirring cavity plate (103) on the inner wall of the metal ring sleeve (101). A number of magnetic detectors (105) and a second electrically controlled magnetic block (13) are also arranged on the stirring cavity plate (103) to cooperate with the ring-driven rotation of the ring-driven remixing mechanism (9) to perform secondary adsorption and uniform mixing of alloy particles in the mixed powder discharged from the pressing mechanism (5).

2. The neodymium iron boron forming apparatus according to claim 1, characterized in that, The pressing mechanism (5) includes a cavity cylinder (51) fixedly assembled on the bottom detection end of the pressure detection mold (4). A partition plate (57) is fixedly installed in the middle of the cavity cylinder (51). Two symmetrically arranged powder storage chambers (58) are fixedly installed on the top of the partition plate (57). A circular support plate (52) is fixedly connected to the bottom of the partition plate (57), and a bearing sleeve (53) is movably installed through the circular support plate (52). A bearing sleeve (53) is fixedly installed on the bearing sleeve (53). The winding cavity disk (54) has a first servo motor (55) whose output end is connected to its winding shaft fixedly installed on its side wall. A traction wire (56) extending from the center of the bearing sleeve disk (53) is wound on the winding shaft to cooperate with the forward and reverse rotation of the winding shaft connected to the output end of the first servo motor (55) to control the traction state of the traction wire (56). The centrifugal remixing mechanism (10) is configured on the end of the traction wire (56) to extend into the alloy powder pressing cylinder module (7) directly opposite the bottom.

3. The neodymium iron boron forming apparatus according to claim 2, characterized in that, The bottom of the cavity cylinder (51) is open, and there is a cavity between the open end and the bottom of the annular support plate (52) to accommodate the centrifugal remixing mechanism (10) pulled up by the traction wire (56). An assembly threaded sleeve (511) is fixedly connected to the side wall of the open end, and a pressing die block (11) is rotatably installed through the assembly threaded sleeve (511). The bottom of each powder storage cavity (58) is fixedly connected to a drainage conduit (59). The bottom of the drainage conduit (59) extends out from the two side edges of the annular support plate (52). The top of each powder storage cavity (58) is fixedly installed with a supplementary conduit (510), and the end of the supplementary conduit (510) is connected to an external hose (12) for connecting to an external feeding end. A hydraulic base rod (8) for extending into the alloy powder pressing cylinder module (7) is fixedly installed through the round opening on the surface of the annular base partition frame (6) at the middle position of the upper surface of the base bracket (1).

4. The neodymium iron boron forming apparatus according to claim 3, characterized in that, The centrifugal remixing mechanism (10) also includes a circular airbag (102) fixedly installed on the outer edge of a metal ring sleeve (101). A stirring cavity plate (103) forming the diameter end is fixedly connected to the inner wall of the metal ring sleeve (101). The stirring cavity plate (103) is generally inclined and sprays water. A cavity shaft rod (104) is horizontally connected at the middle position inside. A movable head (106) is fixedly installed at the middle position of the top of the cavity shaft rod (104). The movable head (106) is a double-layer embedded movable sleeve structure. The movable end of the movable sleeve is fixedly connected to the end of the traction wire (56). Several horizontally arranged magnetic detection probes (105) are fixedly installed at equal intervals on the surface of the cavity shaft rod (104). The magnetic detection end of each magnetic detection probe (105) detects the amount of metal particles accumulated outside in real time through the stirring cavity plate (103).

5. The neodymium iron boron forming apparatus according to claim 4, characterized in that, The centrifugal remixing mechanism (10) further includes side plates (108) fixedly installed inside the stirring cavity plate (103) on both sides of the cavity shaft rod (104). Each side plate (108) has several second electrically controlled magnetic blocks (13) arranged horizontally and equidistantly on its surface. Each second electrically controlled magnetic block (13) is equipped with an independent electrically controlled switch. The magnetic attraction end of the second electrically controlled magnetic block (13) acts on the outside through the stirring cavity plate (103). An air supply valve block (107) is fixedly installed at both ends of the cavity shaft (104), and a branch pipe extending from both ends of the cavity shaft (104) is provided on the output end of the air supply valve block (107). An injection port (109) is opened on the inner wall of the metal ring sleeve (101) through which the branch pipe of the output end of the air supply valve block (107) passes, and the branch pipe of the output end passes through the injection port (109) and is sealed to the input end of the ring airbag (102).

6. The neodymium iron boron forming apparatus according to claim 5, characterized in that, The alloy powder pressing cylinder module (7) includes a through mold cylinder (71). The upper and lower ends of the through mold cylinder (71) are open, and a circular sealing sleeve (72) is fixedly connected at the upper and lower ends of the through mold cylinder (71). A circular notch (73) is opened on the outer edge of each circular sealing sleeve (72), and a sealing circular gasket (74) is fixedly connected at both sides of the circular notch (73). A number of first permeation holes (75) leading to the inside of the through mold cylinder (71) are opened in a circular notch (73) at equal intervals. A second servo motor (14) is fixedly installed at the bottom edge of the circular base partition frame (6). A gear main drive disk (15) is fixedly installed on the output end of the second servo motor (14) and is placed on the upper surface of the circular base partition frame (6).

7. The neodymium iron boron forming apparatus according to claim 6, characterized in that, The ring drive reconfiguration mechanism (9) includes a slave drive base module (91) attached to the center of the upper surface of the ring base partition frame (6), and a ring drive module (92) sleeved on the outside of the through mold cylinder (71). The slave drive base module (91) includes a gear ring sleeve (911), which meshes with the gear main drive disk (15). The gear ring sleeve (911) has a ring cavity (912) inside, and an embedded ring sleeve (913) is fixedly installed inside the ring cavity (912). Two symmetrically arranged partition seals (914) are fixedly connected to the outer edge of the embedded ring sleeve (913), and the inner cavity of the ring cavity (912) is divided into two independent cavity areas by the partition seals (914). The upper surface of the gear ring sleeve (911) is fixedly connected to a corresponding second riser (9110) at the upper surface position of each independent cavity area.

8. The neodymium iron boron forming apparatus according to claim 7, characterized in that, The driven base module (91) also includes an adsorption pump (917) fixedly connected to the outer edge of the inner ring sleeve (913) at the middle end of the two separating sealing frames (914). The inner ring sleeve (913) is cut off by the adsorption pump (917) to form a symmetrical and independent state on both sides. The bottom of each adsorption pump (917) is sealed and protrudes from the bottom surface of the gear ring sleeve (911) to adsorb external gas. The output end of each adsorption pump (917) faces the center end of the gear ring sleeve (911), and the side wall of the gear ring sleeve (911) is provided with an output end for the adsorption pump (917). The first reserved opening (918) is used for the function. A micro transfer pump (915) is fixedly installed inside the partition sealing frame (914). The micro transfer pump (915) is fixedly installed with an extraction valve pipe (916) extending to the annular cavity (912) on both sides of the partition sealing frame (914). The delivery end of the micro transfer pump (915) is connected to the inner cavity of the inner ring sleeve (913). The upper surface of the inner ring sleeve (913) is connected to the first riser (919) on both sides of the micro transfer pump (915). The first riser (919) and the second riser (9110) extend upward in a vertical state.

9. The neodymium iron boron forming apparatus according to claim 8, characterized in that, The ring drive module (92) includes a cylindrical component frame (921) fixedly connected to the upper surface of the gear ring sleeve (911), and a first ring cavity (922) and a second ring cavity (925) are fixedly connected to the upper and lower ends of the cylindrical component frame (921), respectively. An integral first ring protrusion (923) is fixedly connected to the surface of the first ring cavity (922), and the first ring protrusion (923) is sealed and assembled in the circular notch (73) on the upper side of the through mold cylinder (71). The surface of the annular cavity (925) is fixedly connected with an integral second annular protrusion (924). The second annular protrusion (924) is sealed and assembled in the circular groove (73) on the lower side of the through mold cylinder (71). The second annular cavity (925) is independent of the first annular cavity (922). Two symmetrical second reserved through ports (9210) are opened on the outer edge of the second annular cavity (925). The second reserved through ports (9210) and the first reserved through ports (918) are assembled together.

10. The neodymium iron boron forming apparatus according to claim 9, characterized in that, The ring drive module (92) also includes a linear drive motor (926) fixedly installed at symmetrical positions on both sides of the cylindrical component frame (921) in a vertical arrangement. A first electrically controlled magnetic block (9211) is fixedly installed on the linear output end of the linear drive motor (926). The output end of the first electrically controlled magnetic block (9211) is an arc shape attached to the outer surface of the through mold cylinder (71). Side through cavity sleeves (927) are fixedly installed on both sides of the linear drive motor (926). The top of the side through cavity sleeve (927) communicates with the inside of the first annular cavity (922). The bottom of the side through cavity sleeve (927) is connected to the first riser (919). An external expansion frame (928) is fixedly installed on the outer surface of the linear drive motor (926). A reagent storage cylinder (929) corresponding to the second riser (9110) is fixedly installed in each side of the external expansion frame (928).

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