A two-way pressing forming equipment and process for bonding neodymium-iron-boron magnets

Abstract

The application discloses a kind of magnet two-way pressing forming equipment and process for bonding neodymium iron boron, belong to magnetic powder die pressing field.The device includes: stamping mechanism, including frame body, the stamping seat is vertically slidably installed on the frame body, the frame body is installed for driving the drive assembly of the stamping seat movement, the upper punch is installed on the stamping seat;Outer die mechanism, including the lower die plate vertically slidably installed on the frame body, magnetic powder is poured into lower die plate, the transmission assembly for driving the lower die plate movement is installed on the frame body.Drive assembly and transmission assembly are driven to drive upper punch and lower die plate to approach each other to complete stamping, this kind of pressing mode effectively avoids the problem that the upper half area and lower half area of magnetic powder located in lower die plate are significantly different in stress, which leads to subsequent uneven pressing density, avoid shrinkage rate inconsistency in subsequent solidification process to appear defective product, and effectively guarantee the performance of magnet.

Description

Technical Field

[0001] This invention relates to the field of magnetic powder molding technology, and in particular to a bidirectional pressing molding equipment and process for bonding NdFeB magnets. Background Technology

[0002] Bonded NdFeB magnets are widely used in precision equipment such as micromotors and cooling fans due to their excellent magnetic properties and near-net-shape forming capabilities. These magnets are typically manufactured using a compression molding process, in which a mixture of magnetic powder and binder is filled into a mold cavity, and pressure is applied using a punch to densify the powder, forming a green blank with a certain strength.

[0003] In existing technologies, magnetic powder molding generally employs a unidirectional stamping method, where only the upper punch moves downwards to apply pressure to the powder, while the lower punch remains stationary. This molding method has inherent drawbacks: pressure is transmitted only in a single direction, leading to uneven stress distribution within the magnet. The area near the upper punch experiences higher pressure and thus higher density; while the bottom area, farther from the upper punch, experiences significantly lower density due to pressure attenuation during axial transmission, creating a density gradient along the height of the blank. This density unevenness is particularly pronounced when molding thin-walled magnetic rings with a height exceeding 10 mm, as the thin-walled structure is more sensitive to pressure transmission, further amplifying the density differences.

[0004] Uneven density distribution can easily lead to inconsistent shrinkage rates in different parts of the preform during the subsequent curing process. Areas with high density shrink less, while areas with low density shrink more, causing the magnetic ring to warp and deform, which can easily result in defective products during production. Summary of the Invention

[0005] The purpose of this invention is to provide a bidirectional pressing molding equipment and process for bonded NdFeB magnets, as well as a recycling process, to solve the technical problem in the prior art where uneven density during magnetic powder pressing easily leads to defective products.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution: A bidirectional pressing molding device and process for bonding NdFeB magnets, comprising: A stamping mechanism includes a frame, on which a stamping seat is vertically slidably mounted, and a drive assembly for driving the stamping seat to move is mounted on the frame. An upper punch is mounted on the stamping seat. The outer mold mechanism includes a lower mold plate that is vertically slidably mounted on the frame. Magnetic powder is poured onto the lower mold plate. A transmission assembly for driving the lower mold plate to move is mounted on the frame. The upper punch presses into the lower mold plate to form a sealed annular cavity. The punch and the lower mold plate are driven to move closer to each other through the drive assembly and the transmission assembly to complete the stamping.

[0007] Furthermore, the lower template has a shaping hole that penetrates through the upper punch directly below it. The frame is provided with a lower punch that is inserted into the shaping hole. The frame is equipped with a transmission component that drives the lower template to move. A mandrel is vertically and elastically slidably mounted on the lower template, and the top end of the mandrel coaxially penetrates the lower punch.

[0008] Furthermore, the bottom of the lower template is coaxially connected to an installation cylinder via a plate body, a driving block is vertically slidably inserted into the installation cylinder, the bottom end of the mandrel is fixedly installed on the driving block, and a connecting spring is installed between the driving block and the installation cylinder.

[0009] Furthermore, guide rods are symmetrically installed on the stamping base, and the bottom ends of the guide rods are slidably inserted into the frame. A movable plate is slidably fitted between the guide rods, and the movable plate is connected to the lower punch. A transmission component for driving the movable plate to move is installed on the lower template.

[0010] Furthermore, the transmission component includes a rotating disk rotatably mounted on the lower template, a column rod eccentrically mounted on the rotating disk, a connecting plate fixedly mounted on the movable plate, a horizontally opening movable groove on the connecting plate, the column rod sliding tangentially within the movable groove, a worm gear rotatably mounted on the lower template, a worm wheel meshing with the worm gear mounted on the rotating disk, and a motor driving the worm gear to rotate mounted on the lower template.

[0011] Furthermore, the transmission assembly includes a drive plate that is horizontally slidably mounted on the frame, a connecting rod that is hinged to the drive plate, the free end of the connecting rod that is hinged to the mounting cylinder, and a hydraulic cylinder for driving the drive plate to move is mounted on the frame.

[0012] Furthermore, the drive assembly includes a drive disc rotatably mounted on the frame, an eccentric ball connected to a transmission rod on the drive disc, a sliding plate horizontally slidably mounted on the stamping seat, and a ball-on-the-free end of the transmission rod connected to the sliding plate.

[0013] Furthermore, a drive cylinder is installed on the frame, the frame has a conveying plane, and a feeding box is installed at one end of the drive cylinder. The bottom of the feeding box is open and fits against the conveying plane.

[0014] Furthermore, the frame is equipped with a feeding box, and a flexible feeding tube connects the bottom of the feeding box to the feeding box.

[0015] A biaxial pressing process for bonded NdFeB magnets, using the aforementioned biaxial pressing equipment for bonded NdFeB magnets, includes the following steps: S1: Pour the magnetic powder onto the lower template; S2: The driving component drives the stamping seat to move the upper punch downward, so that the upper punch presses into the lower template and together with the lower template forms a sealed annular cavity; S3: Simultaneously activate the drive assembly and the transmission assembly, causing the upper punch to move downward and the lower template to move upward, so that the two move closer to each other to bidirectionally pressurize and form the magnetic powder in the annular cavity. S4: After reaching the set pressure, maintain the pressure for a period of time, and then reset the upper punch to remove the pressed magnet blank from the lower template.

[0016] The beneficial effects of this invention are: 1. The present invention uses a drive component and a transmission component to drive the upper punch and the lower template to approach each other to complete the stamping. This pressing method effectively avoids the problem of uneven density caused by the significant difference in force between the upper and lower half of the magnetic powder in the lower template, and avoids the problem of inconsistent shrinkage rate and defective products during the subsequent curing process.

[0017] 2. In this invention, the moving plate is driven to move upward by the transmission component. When the moving plate moves, it will drive the lower punch to move upward. When the lower punch moves upward, it will push the formed magnetic ring upward, making it easy to remove the formed magnetic ring.

[0018] 3. The driving block of this invention plays a guiding and limiting role, so that the mandrel can be stably flush with the top surface of the lower template under normal conditions. The cooperation between the mounting cylinder and the driving block makes the mandrel more stable when moving.

[0019] 4. During the movement of the connecting plate of the present invention, it indirectly drives the moving plate connected to it to move, thereby realizing the upward movement of the lower punch to complete the demolding. The worm gear design has good self-locking performance, effectively preventing the lower punch from moving unexpectedly during the stamping process.

[0020] 5. In this invention, after the magnetic powder is poured into the feeding box, the drive cylinder is started to move the feeding box towards the lower template until the shaping hole is located at the bottom of the feeding box. Under the action of gravity, the magnetic powder will fall in and fill the shaping hole. Then, under the action of the drive cylinder, the feeding box moves and resets. The bottom plane of the drive cylinder will scrape the excess magnetic powder on the lower template to avoid waste, thereby effectively improving the feeding speed.

[0021] 6. In order to facilitate the pouring of magnetic powder into the feeding box, the existing magnetic powder feeding device can directly add magnetic powder into the feeding box. Under the action of gravity, the magnetic powder will fall into the feeding box along the flexible feeding tube. The flexible feeding tube has a reserved length for the feeding box to move and is kept in an inclined downward state. The bottom end of the flexible feeding tube is connected to the feeding box to avoid magnetic powder from clogging in the flexible feeding tube. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present invention Figure 1 Partial three-dimensional sectional view; Figure 3 For the present invention Figure 1 Another partial sectional view; Figure 4 This is a partial structural diagram of the present invention; Figure 5 For the present invention Figure 4 Partial three-dimensional sectional view; Figure 6 For the present invention Figure 5 Enlarged view of the structure at point A in the middle; Figure 7 For the present invention Figure 4 A schematic diagram of the three-dimensional structure from another direction; Figure 8 This is a schematic diagram of another part of the structure of the present invention.

[0023] Explanation of reference numerals in the attached figures: 1. Stamping mechanism; 101. Frame; 102. Stamping base; 103. Drive assembly; 1031. Drive plate; 1032. Transmission rod; 1033. Sliding plate; 104. Upper punch; 2. Outer mold mechanism; 201. Lower template; 202. Shaping hole; 203. Lower punch; 204. Transmission assembly; 2041. Drive plate; 2042. Linkage rod; 2043. Hydraulic cylinder; 3. Mandrel; 4. Plate; 5. Mounting cylinder; 6. Drive 1001. Moving block; 1002. Connecting spring; 1003. Guide rod; 1004. Moving plate; 1005. Transmission component; 1006. Rotating disk; 1007. Column rod; 1008. Connecting plate; 1009. Movable groove; 10000. Worm gear; 10000. Worm wheel; 10001. Drive cylinder; 10002. Feed box; 1001. Conveying plane; 1002. Feeding box; 1003. Flexible feeding tube; 1004. Mounting groove; 1005. Drive screw; 1006. Guide rail; 1007. Slider; 1008. Mounting box. Detailed Implementation

[0024] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0025] like Figures 1 to 8 As shown in the figure, an embodiment of the present invention provides a bidirectional pressing molding apparatus for bonded NdFeB magnets, comprising: The stamping mechanism 1 includes a frame 101, a stamping seat 102 vertically slidably mounted on the frame 101, a drive assembly 103 for moving the stamping seat 102 mounted on the frame 101, and an upper punch 104 mounted on the stamping seat 102. Figure 1As shown, the upper punch 104 is cylindrical, consistent with existing technology; This application does not impose specific limitations on the structure of the drive assembly 103. It can be any drive structure that can satisfy the vertical movement of the stamping base 102 in this application. For example, in this embodiment, the drive assembly 103 includes a drive disc 1031 rotatably mounted on the frame 101. A hydraulic motor is installed at the top of the frame 101 to drive the drive disc 1031 to rotate around its axis. An eccentric ball is connected to a transmission rod 1032 on the drive disc 1031. A sliding plate 1033 is horizontally slidably mounted on the stamping base 102. The free end of the transmission rod 1032 is ball-connected to... On the sliding plate 1033, the movement of the sliding plate 1033 can be directly driven by existing electric guide rails, or it can be driven by a hydraulic system in conjunction with a cylinder. Preferably, the stamping base 102 is provided with a mounting groove 16, and guide rails 18 are installed on both opposite sides of the mounting groove 16 along its length. A slider 19 is slidably mounted on the guide rails 18, and the slider 19 is connected to the sliding plate 1033 to ensure the stability of the sliding plate 1033 when it moves. A drive screw 17 is horizontally and rotatably mounted in the mounting groove 16, and the sliding plate 1033 is threaded onto the drive screw. A motor connected to the drive screw 17 is mounted on the stamping seat 102 on the screw 17. The rotation of the motor drives the drive screw 17 to rotate. Because the sliding plate 1033 is threadedly engaged with the drive screw 17, the rotation of the drive screw 17 will move the sliding plate 1033 within the mounting groove 16. The threaded engagement has a self-locking property, preventing the moved sliding plate 1033 from moving accidentally. When it is necessary to drive the stamping seat 102 to move, the hydraulic motor starts and drives the rotating disk 1001 to rotate. The rotation of the rotating disk 1001 drives the transmission rod 1032 connected to it by a ball. The other end of the transmission rod 1032 is ball-connected to the top center of the sliding plate 1033. At this time, the sliding plate 1033 is also in an eccentric position relative to the axis of the rotating disk 1001. During the continuous rotation of the rotating disk 1001, the transmission rod 1032 will pull the sliding plate 1033 to move vertically back and forth, realizing the reciprocating movement of the stamping seat 102. The movable design of the sliding plate 1033 makes it easy to control the amplitude of the reciprocating movement of the stamping seat 102, thus having strong adaptability to stamping in different situations and improving applicability.

[0026] The outer mold mechanism 2 includes a lower mold plate 201 vertically slidably mounted on a frame 101. Magnetic powder is poured onto the lower mold plate 201. A transmission assembly 204 for driving the movement of the lower mold plate 201 is mounted on the frame 101. An upper punch 104 presses into the lower mold plate 201 to form a sealed annular cavity. The upper punch 104 and the lower mold plate 201 are driven to move closer to each other through the drive assembly 103 and the transmission assembly 204 to complete the stamping. That is, after the magnetic powder is poured into the lower mold plate 201, the stamping seat 102 moves downward to cause the punch to move downward. The upper punch 104 is positioned within the forming cavity of the lower template 201. During this process, the lower template 201 and the upper punch 104 form an annular cavity, and the lower template 201 moves upward under the action of the transmission component 204 to bidirectionally press the magnetic powder located in the lower template 201. Compared with the existing unidirectional pressing method, this pressing method effectively avoids the problem of uneven density caused by the significant difference in force between the upper and lower half of the magnetic powder located in the lower template 201, and avoids the problem of inconsistent shrinkage rate and defective products during the subsequent curing process.

[0027] like Figures 1 to 4 As shown, in some embodiments, the lower template 201 has a shaping hole 202 that penetrates the upper punch 104 directly below it. The frame 101 has a lower punch 203 that is inserted into the shaping hole 202. The frame 101 is equipped with a transmission assembly 204 that drives the lower template 201 to move. A mandrel 3 is vertically and elastically slidably mounted on the lower template 201. The top end of the mandrel 3 coaxially penetrates the lower punch 203. Under normal conditions, the top end of the mandrel 3 is flush with the top surface of the lower template 201. The lower punch 203 is cylindrical and its interior is sealed by the mandrel 3. When in use, magnetic powder is poured into the shaping hole 202. The lower punch 203 prevents the magnetic powder from passing through the shaping hole 202. The mandrel 3 will make the shaping hole 202 into a ring shape. When the upper punch 104 moves downward, it will block the shaping hole 202. As the upper punch 104 and the lower template 201 approach each other, the upper punch 104 and the lower punch 203 will apply pressure to the magnetic powder. At this time, the top of the mandrel 3 is in an elastic contact with the upper punch 104, which will not affect the movement of the upper punch 104 and plays a positioning role, thereby effectively ensuring the shape of the magnetic ring after molding.

[0028] like Figure 1 and Figure 2 As shown, in some embodiments, the bottom of the lower template 201 is coaxially connected to the mounting cylinder 5 via the plate 4. A driving block 6 is vertically slidably inserted into the mounting cylinder 5. The bottom end of the mandrel 3 is fixedly mounted on the driving block 6. A connecting spring 7 is installed between the driving block 6 and the mounting cylinder 5. The driving block 6 plays a guiding and limiting role, so that under normal conditions, the mandrel 3 can be stably flush with the top surface of the lower template 201. The cooperation between the mounting cylinder 5 and the driving block 6 makes the mandrel 3 more stable when moving.

[0029] like Figures 1 to 4 As shown, in some embodiments, guide rods 8 are symmetrically installed on the stamping base 102. The bottom end of the guide rod 8 is slidably inserted into the frame 101. A movable plate 9 is slidably fitted between the guide rods 8. The movable plate 9 is connected to the lower punch 203. That is, when the movable plate 9 moves, it will drive the lower punch 203 to move. A transmission component 10 for driving the movable plate 9 to move is installed on the lower template 201. The design of the guide rods 8 makes the stamping base 102 more stable when moving. After stamping is completed, the movable plate 9 is driven to move upward through the transmission component 10. When the movable plate 9 moves, it will drive the lower punch 203 to move upward. When the lower punch 203 moves upward, it will push the formed magnetic ring upward, making it easy to remove the formed magnetic ring.

[0030] like Figures 4 to 6 As shown, in some embodiments, the transmission component 10 includes a rotating disk 1001 rotatably mounted on the lower template 201. A column rod 1002 is eccentrically mounted on the rotating disk 1001. A connecting plate 1003 is fixedly mounted on the moving plate 9. A horizontally opening movable groove 1004 is provided on the connecting plate 1003. The column rod 1002 slides tangentially within the movable groove 1004. A worm gear 1005 is rotatably mounted on the lower template 201. A worm wheel 1006 meshing with the worm gear 1005 is mounted on the rotating disk 1001. A motor driving the worm gear 1005 to rotate is mounted on the lower template 201. When the lower punch 203 needs to be moved to eject the formed magnetic ring, the motor starts, driving the worm gear 1005 to rotate. Because the worm gear 1005 meshes with the worm wheel 1006, the worm gear 1005 will drive the worm wheel 1006 to rotate when it rotates. During the continuous rotation of the worm gear 1005, it will drive the rotating disk 1001 connected to it to rotate. Specifically, the rotating disk 1001 is mounted on the lower template 201 via a rod. The worm gear 1006 is fitted onto the rod. A mounting box 20 is installed on the lower template 201, and the worm 1005 is located inside the mounting box 20, effectively preventing damage to the worm 1005 from external sources. The rotation of the rotating disk 1001 drives the column rod 1002 to rotate. At this time, the column rod 1002 rotates eccentrically. Because the column rod 1002 slides tangentially within the movable groove 1004, it moves within the movable groove 1004 during the eccentric rotation of the column rod 1002, thereby forcing the connecting plate 1003 to move. During the movement of the connecting plate 1003, it indirectly drives the moving plate 9 connected to it to move, thereby realizing the upward movement of the lower punch to complete demolding. The design of the worm gear 1006 and worm 1005 has good self-locking performance, effectively preventing the lower punch 203 from moving unexpectedly during the stamping process.

[0031] like Figures 2 to 5As shown, in some embodiments, the transmission assembly 204 includes a drive plate 2041 horizontally slidably mounted on the frame 101. A connecting rod 2042 is hinged to the drive plate 2041, and the free end of the connecting rod 2042 is hinged to the mounting cylinder 5. A hydraulic cylinder 2043 for driving the drive plate 2041 to move is mounted on the frame 101. That is, when it is necessary to drive the lower template 201 to move, the extension end of the hydraulic cylinder 2043 moves, causing the drive plate 2041 to move. During the movement, the drive plate 2041 will drive the connecting rod 2042 hinged to it to move. Because the free end of the connecting rod 2042 is hinged to the mounting cylinder 5, the drive plate 2041 will force the mounting cylinder 5 to move vertically through the connecting rod 2042 when it moves. Since the mounting cylinder 5 is connected to the lower template 201 through the plate 4, the movement of the drive plate 2041 will drive the mounting cylinder 5 to move vertically, thereby realizing the movement of the lower template 201.

[0032] like Figure 1 and Figure 2 As shown, in order to further improve production efficiency, in some embodiments, a drive cylinder 11 is installed on the frame 101, and the frame 101 has a conveying plane 13. A feeding box 12 is installed at one end of the drive cylinder 11. The bottom of the feeding box 12 is open and fits against the conveying plane 13. After the magnetic powder is poured into the feeding box 12, the drive cylinder 11 starts and drives the feeding box 12 to move towards the lower template 201 until the shaping hole 202 is located at the bottom of the feeding box 12. Under the action of gravity, the magnetic powder will fall in and fill the shaping hole 202. Then, under the action of the drive cylinder 11, the feeding box 12 moves and resets. The bottom plane of the drive cylinder 11 will scrape the excess magnetic powder on the lower template 201 to avoid waste, thereby effectively improving the feeding speed.

[0033] like Figure 1 and Figure 2 As shown, in some embodiments, a feeding box 14 is constructed on the frame 101. A flexible feeding tube 15 is connected between the bottom of the feeding box 14 and the feeding box 14. In order to facilitate the pouring of magnetic powder into the feeding box 14, the existing magnetic powder feeding device can directly add magnetic powder into the feeding box 14. Under the action of gravity, the magnetic powder will fall into the feeding box 14 along the flexible feeding tube 15. The flexible feeding tube 15 has a reserved length for the feeding box 14 to move and is kept in an inclined downward state. The bottom end of the flexible feeding tube 15 is connected to the feeding box 14 to avoid the magnetic powder from being blocked in the flexible feeding tube 15.

[0034] like Figures 1 to 8 As shown, a biaxial pressing process for bonded NdFeB magnets, using the aforementioned biaxial pressing equipment for bonded NdFeB magnets, includes the following steps: S1: Pour the magnetic powder onto the lower template 201; S2: The upper punch 104 moves downward by driving the stamping seat 102 through the driving component 103, so that the upper punch 104 presses into the lower template 201, and together with the lower template 201, forms a sealed annular cavity. S3: Simultaneously start the drive assembly 103 and the transmission assembly 204, so that the upper punch 104 moves downward and the lower template 201 moves upward, and the two move closer to each other to perform bidirectional pressure molding of the magnetic powder in the annular cavity. S4: After reaching the set pressure, maintain the pressure for a period of time, and then reset the upper punch 104 to remove the pressed magnet blank from the lower template 201.

[0035] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A bidirectional pressing molding device for bonding NdFeB magnets, characterized in that, include: The stamping mechanism (1) includes a frame (101), on which a stamping seat (102) is vertically slidably mounted, and a drive assembly (103) for driving the stamping seat (102) to move is mounted on the frame (101). An upper punch (104) is mounted on the stamping seat (102). The outer mold mechanism (2) includes a lower template (201) that is vertically slidably mounted on the frame (101). Magnetic powder is poured into the lower template (201). A transmission assembly (204) for driving the lower template (201) to move is installed on the frame (101). The upper punch (104) punches into the lower template (201) to form a sealed annular cavity. The punch and the lower template (201) are driven to move closer to each other by the drive assembly (103) and the transmission assembly (204) to complete the punching.

2. The bidirectional pressing molding equipment for bonded NdFeB magnets as described in claim 1, characterized in that, The lower template (201) is located directly below the upper punch (104) and has a shaping hole (202) that penetrates the lower template (201). The frame (101) is provided with a lower punch (203) that is inserted into the shaping hole (202). The frame (101) is equipped with a transmission component (204) that drives the lower template (201) to move. A mandrel (3) is vertically and elastically slidably mounted on the lower template (201). The top end of the mandrel (3) coaxially penetrates the lower punch (203).

3. The bidirectional pressing molding equipment for bonded NdFeB magnets as described in claim 2, characterized in that, The bottom of the lower template (201) is coaxially connected to the mounting cylinder (5) via the plate (4). A driving block (6) is vertically slidably inserted inside the mounting cylinder (5). The bottom end of the mandrel (3) is fixedly installed on the driving block (6). A connecting spring (7) is installed between the driving block (6) and the mounting cylinder (5).

4. The bidirectional pressing molding equipment for bonded NdFeB magnets as described in claim 2, characterized in that, Guide rods (8) are symmetrically installed on the stamping seat (102). The bottom end of the guide rods (8) is slidably inserted into the frame (101). A movable plate (9) is slidably fitted between the guide rods (8). The movable plate (9) is connected to the lower punch (203). A transmission component (10) for driving the movable plate (9) to move is installed on the lower template (201).

5. The bidirectional pressing molding equipment for bonded NdFeB magnets as described in claim 4, characterized in that, The transmission component (10) includes a rotating disk (1001) rotatably mounted on the lower template (201), a column rod (1002) eccentrically mounted on the rotating disk (1001), a connecting plate (1003) fixedly mounted on the moving plate (9), a movable groove (1004) horizontally opened on the connecting plate (1003), the column rod (1002) sliding tangentially within the movable groove (1004), a worm gear (1005) rotatably mounted on the lower template (201), a worm wheel (1006) meshing with the worm gear (1005) mounted on the rotating disk (1001), and a motor driving the worm gear (1005) to rotate mounted on the lower template (201).

6. The bidirectional pressing molding equipment for bonded NdFeB magnets as described in claim 3, characterized in that, The transmission assembly (204) includes a drive plate (2041) that is horizontally slidably mounted on the frame (101), a connecting rod (2042) that is hinged to the drive plate (2041), the free end of the connecting rod (2042) that is hinged to the mounting cylinder (5), and a hydraulic cylinder (2043) that is mounted on the frame (101) for driving the drive plate (2041) to move.

7. The bidirectional pressing molding equipment for bonded NdFeB magnets as described in claim 1, characterized in that, The drive assembly (103) includes a drive disk (1031) rotatably mounted on the frame (101), an eccentric ball connected to a transmission rod (1032) on the drive disk (1031), a sliding plate (1033) horizontally slidably mounted on the stamping seat (102), and a ball connected to the free end of the transmission rod (1032) on the sliding plate (1033).

8. The bidirectional pressing molding equipment for bonded NdFeB magnets as described in claim 1, characterized in that, A drive cylinder (11) is installed on the frame (101). The frame (101) has a conveying plane (13). A feeding box (12) is installed at one end of the drive cylinder (11). The bottom of the feeding box (12) is open and fits against the conveying plane (13).

9. The bidirectional pressing molding equipment for bonded NdFeB magnets as described in claim 8, characterized in that, The frame (101) is equipped with a feeding box (14), and a flexible feeding tube (15) is connected between the bottom of the feeding box (14) and the feeding box (14).

10. A biaxial pressing molding process for bonded NdFeB magnets, using the biaxial pressing molding equipment for bonded NdFeB magnets as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Pour the magnetic powder onto the lower template (201); S2: The driving component (103) drives the stamping seat (102) to move the upper punch (104) downward, so that the upper punch (104) presses into the lower template (201) and together with the lower template (201) forms a sealed annular cavity; S3: Simultaneously activate the drive assembly (103) and the transmission assembly (204) to make the upper punch (104) move downward and the lower template (201) move upward, so that the two move closer to each other to perform bidirectional pressure molding of the magnetic powder in the annular cavity; S4: After reaching the set pressure, maintain the pressure for a period of time, and then reset the upper punch (104) to remove the pressed magnet blank from the lower template (201).

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