An apparatus and method for magnetizing a neodymium-iron-boron magnet

Abstract

The application discloses a device and method for magnetizing a neodymium iron boron magnet, which comprises a magnetizer, a lamination conveying channel, a lamination mechanism and a lamination set sheet removing mechanism. The lamination set sheet removing mechanism comprises a visual detection system, at least two sheet removing plates and a driving mechanism. The visual detection system is arranged above the lamination conveying channel to identify whether there is a missing gasket between adjacent blank sheets in real time. At least two sheet removing plates with switchable postures are arranged. When an extra blank sheet is detected, a clutch transmission selectively connects the driving shaft with a corresponding number of sheet removing plates. The sheet removing plates are switched from an initial posture to a sheet removing posture, and the extra blank sheet is removed from the lamination conveying channel. The device realizes automatic identification and accurate removal of stacking defects, and solves the technical problems in the prior art, i.e., difficulty in separating after magnetization, influence on sheet separation efficiency and easy breakage of blank sheets due to the lack of gaskets between adjacent blank sheets.

Description

Technical Field

[0001] This invention relates to the field of magnetization equipment technology, specifically to an apparatus and method for magnetizing neodymium iron boron magnets. Background Technology

[0002] Neodymium iron boron (NdFeB) permanent magnets are widely used in consumer electronics, new energy vehicles, wind power generation, and medical devices due to their excellent magnetic properties. In the production process of NdFeB magnets, sintered blanks and insulating pads are alternately stacked and fed into a magnetizer for saturation magnetization, followed by further processing to form the finished product.

[0003] In current production, the stacking of blank sheets and spacers is usually completed automatically by a stacking mechanism. However, due to factors such as feeding errors, conveyor vibration, or sensor misjudgments, spacers may be missing between two or more adjacent blank sheets during the stacking process, resulting in a defect of "multiple blank sheets stacked continuously." After being magnetized in the magnetizer, these stacked blank sheets, lacking spacer isolation, become tightly attracted to each other due to strong magnetism, making them difficult to separate. This not only affects the efficiency of subsequent slitting processes but also easily leads to corner chipping, edge breakage, or even breakage of the blank sheets during forced separation, resulting in material waste and a decrease in yield. In severe cases, the clamped blank sheets may become stuck in the magnetization chamber or conveyor channel, causing equipment malfunction and downtime.

[0004] Currently, the detection and handling of such stacking defects mainly rely on manual visual sampling, which is not only inefficient but also has a high rate of missed detections. Although some equipment is equipped with vision inspection systems, it can only trigger an alarm and stop the machine, still requiring manual intervention. It cannot automatically remove defective stacks, affecting the continuity and automation level of the production line.

[0005] Therefore, how to automatically identify and remove defective stacks of blanks lacking spacers between adjacent blanks during the stacking and conveying process has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] To address the problems existing in the prior art, a device and method for magnetizing neodymium iron boron magnets are provided. By setting a vision inspection system above the stacking conveyor channel to identify in real time whether there is a lack of spacers between adjacent blanks, and setting at least two switchable rejection plates, when an excess blank is detected, the clutch drive selectively connects the drive shaft to the corresponding number of rejection plates, driving the rejection plates to switch from the initial posture to the rejection posture, and removing the excess blank from the stacking conveyor channel. This achieves automatic identification and precise rejection of stacking defects, and solves the technical problems in the prior art where the lack of spacers between adjacent blanks makes it difficult to separate after magnetization, affects the splitting efficiency, and easily causes blank breakage.

[0007] To address the problems of existing technologies, this invention provides a device for magnetizing neodymium iron boron magnets, including a magnetizer, a stacking conveyor channel, and a stacking mechanism; it also includes a stacking group rejection mechanism for identifying and removing excess blanks lacking spacers between adjacent blanks in the stacking group. The stacking group rejection mechanism includes: a visual inspection system disposed at the top of the stacking conveyor channel for detecting the presence of excess blanks lacking spacers between adjacent blanks in the stacking conveyor channel; at least two rejection plates disposed on one side of the stacking conveyor channel, with a thickness equal to the thickness of the blanks, each rejection plate having a rejection opening, and the rejection plates having an initial posture and a rejection posture; when the rejection plate is in the initial posture, the rejection opening interacts with the stacking conveyor channel... The conveying channel is connected; when the rejecting plate is in the rejecting posture, the rejecting nozzle disengages from the stacking conveying channel to remove excess blanks from the stacking conveying channel; a driving mechanism is disposed on one side of the stacking conveying channel and has a driver, the driver including a drive shaft, and a clutch transmission is respectively disposed between the drive shaft and each of the rejecting plates, the drive shaft selectively drivingly connecting with a corresponding number of rejecting plates through the clutch transmission; wherein, when the vision inspection system detects the presence of excess blanks, the clutch transmission drives the drive shaft to drively connect with the corresponding number of rejecting plates, the drive shaft drives the rejecting plate to switch from the initial posture to the rejecting posture, so as to remove the excess blanks from the stacking conveying channel.

[0008] Preferably, the chipping plate has a disc-shaped structure, and the chipping openings are distributed along the circumference of the chipping plate; when the drive shaft drives the chipping plate to rotate through the clutch transmission, the posture of the chipping plate changes.

[0009] Preferably, the stacked chip removal mechanism further includes a chip removal push rod, which is disposed on one side of the chip removal plate, and the output rod of the chip removal push rod faces the chip removal opening when the chip removal plate is in the chip removal posture.

[0010] Preferably, each of the chip-removing plates has a docking cylinder at its end, the docking cylinders are coaxially arranged, and the inner diameter of each docking cylinder increases sequentially from the inside to the outside; each docking cylinder has a docking interface distributed along its circumference; the stacked chip-removing mechanism also includes a frame and a rotating cylinder rotatably arranged on the frame, the drive shaft is drivingly connected to the rotating cylinder; the clutch transmission includes a docking pin, the docking pin is radially movably arranged on the rotating cylinder, and by adjusting the extension length of the docking pin relative to the rotating cylinder, the docking pin selectively docks with the docking interfaces on each docking cylinder to achieve torque transmission.

[0011] Preferably, the docking interface is located at the end of the docking cylinder, and the clutch transmission further includes: a sliding member, which is coaxially and slidably disposed inside the docking cylinder; a connecting rod, the two ends of which are respectively connected to the docking pin and the sliding member; and a stroke adjustable push rod, which is disposed on the frame and whose output rod is rotatably connected to the sliding member.

[0012] Preferably, the rotating cylinder has sliding grooves distributed circumferentially thereon; the outer surface of the sliding member is provided with a connecting seat, the connecting seat extends radially along the sliding member and passes through the sliding groove to be rotatably connected to the end of the connecting rod.

[0013] Preferably, the docking cylinder located at the center is coaxial with and rotatably connected to the rotating cylinder; an external locking device is provided on the frame, which selectively locks with each of the chip-removing plates to keep the chip-removing plates not connected to the docking pin stationary relative to the other chip-removing plates.

[0014] Preferably, the outer periphery of the chip-removing plate is provided with V-shaped grooves distributed circumferentially thereon, and the number of the V-shaped grooves is the same as the number of chip-removing openings; the outer locking device includes a locking rod, a locking head, and a first elastic element; the locking rod is slidably disposed on the frame along the radial direction of the chip-removing plate; the locking head is disposed at one end of the locking rod facing the chip-removing plate, and the locking head forms a locking engagement with the V-shaped grooves; the first elastic element is sleeved on the locking rod and is located between the locking head and the inner wall of the frame.

[0015] Preferably, an inner locking device is provided between two adjacent chip-removing plates; one of the chip-removing plates has a mounting groove on its side wall, the mounting groove being parallel to the axis of the chip-removing plate; the other adjacent chip-removing plate has a locking groove on its side wall corresponding to the mounting groove; the inner locking device includes a second elastic element and a ball bearing, the second elastic element and the ball bearing being installed sequentially from the inside to the outside in the mounting groove, and the ball bearing part protruding from the mounting groove and forming a locking engagement with the locking groove.

[0016] A method for magnetizing neodymium iron boron magnets, employing an apparatus for magnetizing neodymium iron boron magnets, includes the following steps: Step 1: The blank sheet and the spacer are alternately stacked to form a stacked group by the stacking mechanism, and then conveyed to the stacking conveying channel; Step 2: The vision inspection system acquires images of the stacked sheets in the stacking conveyor channel in real time to identify whether there are extra blank sheets lacking spacers between adjacent blank sheets; Step 3: When the vision inspection system detects the presence of excess blanks, it determines the number of blank removal plates that need to be activated based on the number of excess blanks. The clutch transmission then connects the drive shaft to the corresponding number of blank removal plates. Step 4: The drive mechanism drives the stripping plate, which has established a transmission connection, to switch from the initial posture to the stripping posture via the drive shaft, so that the stripping nozzle removes the excess blanks from the stacking conveyor channel. Step 5: After the chip removal is completed, the drive mechanism drives the chip removal plate to reset from the chip removal posture to the initial posture, and the clutch transmission disconnects the transmission connection between the drive shaft and the chip removal plate. Step six: The stacking conveyor continues to transport the qualified stacks to the magnetizer, where the magnetizer magnetizes the stacks.

[0017] The advantages of this application compared to the prior art are: This application achieves automatic identification and online rejection of stacking defects through the cooperation of a vision inspection system and a rejection plate, eliminating the need for manual intervention. This significantly improves the automation level and inspection efficiency of the production line and avoids batch defects caused by missed inspections. The rejection plate has the same thickness as the blank sheet, and multiple rejection plates can operate independently or in combination, enabling precise layered rejection of different quantities of excess blank sheets. This ensures rejection effectiveness while avoiding accidental damage to adjacent spacers or qualified blank sheets.

[0018] The clutch-driven transmission selectively connects the drive shaft and the stripping plate, allowing the same drive mechanism to drive multiple stripping plates. This results in a compact structure, flexible control, and reduced equipment cost and space occupation. The combination of an inkjet printer and a visual inspection camera enables identification and quality traceability of the raw strips, providing data support for quality analysis in subsequent processes. The linkage between the segmented cylinder and the partition conveyor belt enables automatic, fixed-length cutting and orderly output of the magnetized strips, reducing manual operation and improving the consistency and packaging efficiency of the finished products.

[0019] This equipment integrates blank sheet feeding, inkjet printing detection, gasket feeding, alternating stacking, defect removal, magnetization, cutting, and output, realizing the full automation of the neodymium iron boron magnet magnetization process, significantly improving production efficiency and yield. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a device for magnetizing neodymium iron boron magnets according to the present invention.

[0021] Figure 2 This is a perspective view of the stacking and chipping mechanism in a device for magnetizing neodymium iron boron magnets according to the present invention, viewed from a first perspective.

[0022] Figure 3 This is a partial exploded perspective view of the stacking and chipping mechanism in a device for magnetizing neodymium iron boron magnets according to the present invention.

[0023] Figure 4 This is a top view of a stacking and chipping mechanism in a device for magnetizing neodymium iron boron magnets according to the present invention.

[0024] Figure 5 This is a perspective view of the stacking and chipping mechanism in a device for magnetizing neodymium iron boron magnets according to the present invention, viewed from a second perspective.

[0025] Figure 6 This is a cross-sectional view of the stacking and chipping mechanism in a device for magnetizing neodymium iron boron magnets according to the present invention.

[0026] Figure 7 yes Figure 6 A magnified view of part A.

[0027] Figure 8 This is a partial exploded perspective view of the frame of the stacking and chipping mechanism in a device for magnetizing neodymium iron boron magnets according to the present invention.

[0028] Figure 9 yes Figure 8 A magnified view of section B.

[0029] Figure 10 This is a schematic diagram of a chipping plate in a device for magnetizing neodymium iron boron magnets according to the present invention.

[0030] The diagram is labeled as follows: 1. Magnetizer; 2. Stacking conveyor channel; 21. Partition conveyor belt; 22. Segmented cylinder; 3. Stacking mechanism; 4. Raw sheet conveyor line; 5. Inkjet printer; 6. Inkjet visual inspection camera; 7. Gasket vibratory feeder; 8. Raw sheet vibratory feeder; 9. Stacking group rejection mechanism; 91. Visual inspection system; 92. Rejection plate; 921. Rejection port; 922. Docking cylinder; 9221. Docking interface; 923. V-groove; 924, mounting groove; 925, locking groove; 931, driver; 932, mating pin; 933, sliding element; 9331, connecting seat; 934, connecting rod; 935, adjustable stroke push rod; 94, chip push rod; 95, frame; 96, rotating cylinder; 961, sliding groove; 971, locking rod; 972, locking head; 973, first elastic element; 981, second elastic element; 982, ball bearing. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 5As shown, an apparatus for magnetizing neodymium iron boron magnets includes a magnetizer 1, a stacking conveying channel 2, and a stacking mechanism 3; it also includes a stacking group rejection mechanism 9 for identifying and removing excess blanks lacking spacers between adjacent blanks in the stacking group. The stacking group rejection mechanism 9 includes: a visual inspection system 91, disposed at the top of the stacking conveying channel 2, for detecting whether there are excess blanks lacking spacers between adjacent blanks in the stacking conveying channel 2; at least two rejection plates 92, disposed on one side of the stacking conveying channel 2, with a thickness equal to the thickness of the blanks, each rejection plate 92 having a rejection opening 921, and the rejection plate 92 having an initial posture and a rejection posture; when the rejection plate 92 is in the initial posture, the rejection opening 921 is connected to the stacking conveying channel 2. When the rejecting plate 92 is in the rejecting posture, the rejecting port 921 disengages from the stacking conveying channel 2 to remove excess blanks from the stacking conveying channel 2; a driving mechanism, disposed on one side of the stacking conveying channel 2, has a driver 931, the driver 931 has a drive shaft, and a clutch transmission is respectively disposed between the drive shaft and each of the rejecting plates 92, the drive shaft selectively drivingly connected to a corresponding number of rejecting plates 92 through the clutch transmission; wherein, when the vision inspection system 91 detects the presence of excess blanks, the clutch transmission drives the drive shaft to drively connect to the corresponding number of rejecting plates 92, the drive shaft drives the rejecting plate 92 to switch from the initial posture to the rejecting posture, so as to remove the excess blanks from the stacking conveying channel 2.

[0033] For example, a normal stacking sequence is "blank sheet - spacer - blank sheet - spacer". If a "blank sheet - blank sheet" fault occurs, then the second blank sheet is "redundant".

[0034] The stacking conveying channel 2 passes horizontally through the magnetization cavity of the magnetizer 1 and is used to convey blank sheets and gaskets that are stacked alternately into the magnetization cavity; the stacking mechanism 3 has a stacking outlet, a blank sheet inlet and a gasket inlet, and the stacking outlet is connected to the stacking conveying channel 2.

[0035] It also includes a blank sheet conveyor line 4, an inkjet printer 5, an inkjet printing visual inspection camera 6, a gasket vibrating plate 7, and a blank sheet vibrating plate 8. The blank sheet conveyor line 4 is located on one side of the stacking mechanism 3, and its discharge port is connected to the blank sheet feed port of the stacking mechanism 3. The inkjet printer 5 is located at the top of the blank sheet conveyor line 4 and is used to print ink on the blank sheets. The inkjet printing visual inspection camera 6 is located at the top of the blank sheet conveyor line 4 and downstream of the inkjet printer 5, and is used to detect the inkjet printing. The gasket vibrating plate 7 is located on one side of the stacking mechanism 3, and its discharge port is connected to the gasket feed port of the stacking mechanism 3. The blank sheet vibrating plate 8 is located at the feed end of the blank sheet conveyor line 4, and its discharge port is connected to the feed port of the blank sheet conveyor line 4.

[0036] The discharge end of the stacked sheet conveying channel 2 is equipped with a partition conveyor belt 21, and the loading end of the partition conveyor belt 21 is equipped with a segmented cylinder 22. The working end of the segmented cylinder 22 is used to divide the magnetized neodymium iron boron magnet sheet wire into segments of fixed length neodymium iron boron magnet sheet groups and push them onto the partition conveyor belt 21.

[0037] During operation, blank sheets are conveyed to the blank sheet conveyor line 4 via the blank sheet vibrating plate 8. A coding machine 5 marks the blank sheets with coding ink, and a visual inspection camera detects the coding quality. Qualified blank sheets enter the stacking mechanism 3. Spacers are conveyed to the stacking mechanism 3 via the spacer vibrating plate 7. The stacking mechanism 3 alternately stacks blank sheets and spacers to form stacked groups, which are then fed into the stacking conveyor channel 2 through the stacking outlet. The visual inspection system 91 performs real-time image acquisition and analysis on the passing stacked groups to determine if there are missing spacers between adjacent blank sheets. If excess blank sheets are detected, the control system determines the number of rejection plates 92 that need to be activated based on the number of excess blank sheets, and controls the clutch transmission to connect the drive shaft to the corresponding number of rejection plates 92. The drive mechanism drives the rejection plates 92 to switch from their initial posture to the rejection posture, and the rejection nozzle 921 separates and removes the excess blank sheets from the stacked groups. After rejection, the rejection plates 92 reset, and qualified stacked groups continue to be conveyed forward. The stacked sheet assembly then enters the magnetization chamber of the magnetizer 1 to complete saturation magnetization, forming a magnetic sheet wire. The magnetic sheet wire enters the sectioning cylinder 22 station, where the sectioning cylinder 22 cuts it into sections of magnetic sheet assembly according to a set length, and pushes it to the partition conveyor belt 21 for output.

[0038] like Figures 2 to 6 As shown, the chip removal plate 92 has a disc-shaped structure, and the chip removal openings 921 are distributed along the circumference of the chip removal plate 92; when the drive shaft drives the chip removal plate 92 to rotate through the clutch transmission, the posture of the chip removal plate 92 changes.

[0039] Initially, the rejecting plate 92 is stationary, with one rejecting port 921 connected to the stack conveying channel 2, allowing the stacked sheets to pass through normally. When the vision inspection system 91 detects excess blank sheets, the clutch transmission connects the drive shaft to the corresponding rejecting plate 92, causing the drive shaft to rotate the rejecting plate 92 by a certain angle. As the rejecting plate 92 rotates, the rejecting port 921, which was originally connected to the channel, gradually disengages, while the adjacent rejecting port 921 rotates into the channel position. During the switching of the rejecting ports 921, excess blank sheets are pushed or carried away by the edges of the rejecting ports 921 and separated from the stacked sheets. After rejection is completed, the rejecting plate 92 continues to rotate or reverses to reset, reconnecting the next rejecting port 921 to the channel, preparing for the passage of subsequent stacked sheets.

[0040] The disc-shaped structure ensures that the rejection nozzles 921 are evenly distributed circumferentially. Multiple rejection nozzles 921 can be switched sequentially by rotation, eliminating the need for reciprocating oscillations, resulting in a simple motion trajectory and convenient control. When the rejection plate 92 rotates, the edges of the rejection nozzles 921 exert a continuous pushing action on excess blank pieces, ensuring a smooth separation process and avoiding damage to the blank pieces or pads that might be caused by impact rejection. The circumferential distribution of the rejection nozzles 921 allows for the installation of multiple nozzles 921 of different sizes or shapes to accommodate the rejection needs of blank pieces of different specifications, improving the equipment's versatility. The cooperation between the disc-shaped rejection plate 92 and the clutch drive allows multiple rejection plates 92 to rotate independently or in conjunction, achieving precise rejection of excess blank pieces at different positions. The rotation angle of the rejection plate 92 can be precisely controlled by the drive mechanism, ensuring a stable dwell position of the rejection nozzles 921, guaranteeing the neatness of the stacked blanks after rejection and the continuity of the conveying process. The disc-shaped structure offers high rigidity and excellent dynamic balance during rotation, making it suitable for high-speed operation and improving overall production line efficiency. The thickness of the rejection plate 92 is the same as the blank sheet thickness, preventing interference with adjacent qualified materials during rotation and ensuring the selectivity and precision of the rejection action.

[0041] like Figure 5 and Figure 10 As shown, the stacked chip removal mechanism 9 also includes a chip removal push rod 94, which is disposed on one side of the chip removal plate 92, and the output rod of the chip removal push rod 94 faces the chip removal opening 921 when the chip removal plate 92 is in the chip removal posture.

[0042] When the vision inspection system 91 detects excess blank pieces, the clutch transmission connects the drive shaft to the corresponding number of rejection plates 92. The drive shaft rotates the rejection plates 92 to a rejection posture, aligning the rejection nozzle 921 with the excess blank pieces in the stack conveying channel 2. At this time, the rejection push rod 94 is activated, its output rod extending forward and passing through the rejection nozzle 921 to push the excess blank pieces out of the stack conveying channel 2, causing them to detach from the stack and fall into the recycling container. After the ejection is completed, the rejection push rod 94 resets, the rejection plates 92 rotate back to their original position, and the stack conveying channel 2 is reopened to unobstructed flow.

[0043] The active pushing action of the scrapping pusher 94 compensates for the insufficient force of simply relying on the rotation of the scrapping plate 92, making it particularly suitable for situations where the scraps are tightly stacked or the blanks are thick, ensuring that excess blanks can be completely separated. The output rod direction of the scrapping pusher 94 is consistent with the axis of the scrapping opening 921, and the pushing force acts directly on the center of the blank, resulting in smooth pushing and preventing the blanks from tilting or getting stuck.

[0044] like Figure 6 , Figure 7 and Figure 8 As shown, each of the chip-removing plates 92 has a docking cylinder 922 at its end. The docking cylinders 922 are coaxially arranged, and their inner diameters increase sequentially from the inside to the outside. Each docking cylinder 922 has a docking interface 9221 distributed circumferentially on it. The chip-removing mechanism 9 also includes a frame 95 and a rotating cylinder 96 rotatably mounted on the frame 95. The drive shaft is connected to the rotating cylinder 96. The clutch transmission includes a docking pin 932, which is radially movable on the rotating cylinder 96. By adjusting the extension length of the docking pin 932 relative to the rotating cylinder 96, the docking pin 932 can selectively dock with the docking interface 9221 on each docking cylinder 922 to achieve torque transmission.

[0045] Each of the stacking plates 92 has a docking cylinder 922 at its end. The docking cylinders 922 are coaxially arranged, and their inner diameters increase sequentially from the inside to the outside, forming a nested structure. Each docking cylinder 922 has a circumferentially distributed mating interface 9221 for engaging with a docking pin 932 to transmit torque. The stacking plate stacking mechanism 9 also includes a frame 95 and a rotating cylinder 96 rotatably mounted on the frame 95. The drive shaft is connected to the rotating cylinder 96. The clutch actuator includes a docking pin 932, which is movably mounted on the rotating cylinder 96 radially. By adjusting the extension length of the docking pin 932 relative to the rotating cylinder 96, the docking pin 932 passes through the docking interface 9221 of the inner docking cylinder 922 and engages with the docking interface 9221 of the corresponding outer docking cylinder 922, thereby realizing the torque transmission between the drive shaft and the corresponding chipping plate 92, and selectively driving different levels or different numbers of chipping plates 92 to rotate according to the extension length of the docking pin 932.

[0046] During operation, when the vision inspection system 91 detects excess blanks, the control system determines the number of rejection plates 92 and the corresponding docking cylinder 922 levels that need to be activated based on the number of excess blanks. The control pin 932 extends radially along the rotating cylinder 96 to a predetermined length, passing through the interface 9221 of the outer docking cylinder 922 and then continuing to the interface 9221 of the target level docking cylinder 922, where it engages. After docking, the drive shaft rotates the rotating cylinder 96, which in turn rotates the target docking cylinder 922 via the pin 932, thereby driving the corresponding rejection plate 92 to switch from its initial posture to the rejection posture. For rejection plates 92 that do not require action, they remain stationary because the interface 9221 on their docking cylinder 922 is misaligned with the pin 932 or the pin 932 has not extended into that level. After rejection, the pin 932 retracts, disconnecting the power connection, and the rejection plate 92 resets.

[0047] like Figure 7 As shown, the docking interface 9221 is located at the end of the docking cylinder 922. The clutch transmission also includes: a sliding member 933, which is coaxially and slidably disposed in the docking cylinder 922; a connecting rod 934, whose two ends are respectively connected to the docking pin 932 and the sliding member 933; and a stroke adjustable push rod 935, which is disposed on the frame 95 and whose output rod is rotatably connected to the sliding member 933.

[0048] When the vision inspection system 91 detects excess blank pieces, the control system sends a command to the adjustable-stroke push rod 935. The push rod output rod extends a predetermined length, pushing the sliding member 933 to move axially along the docking cylinder 922. The sliding member 933 drives the docking pin 932 to extend radially along the rotating cylinder 96 via the connecting rod 934. Due to the transmission action of the connecting rod 934, the axial displacement of the sliding member 933 determines the radial extension length of the docking pin 932. By adjusting the extension length of the adjustable-stroke push rod 935, the radial extension distance of the docking pin 932 can be precisely controlled, ensuring accurate engagement with the target layer's docking interface 9221. After docking, the drive shaft drives the scrap removal plate 92 to move. After scrap removal, the adjustable-stroke push rod 935 moves in the opposite direction, pulling the sliding member 933 back to its original position, retracting the docking pin 932, and disconnecting the power connection.

[0049] The adjustable-stroke push rod 935, in conjunction with the connecting rod 934, converts the axial movement of the push rod into the radial movement of the docking pin 932. The transmission path is clear, facilitating precise control of the extension length of the docking pin 932. By adjusting the stroke of the adjustable-stroke push rod 935, the radial extension distance of the docking pin 932 can be flexibly set, thereby selecting to drive different levels of the scrap plates 92 to meet the needs of removing different quantities of excess blanks. The adjustable-stroke push rod 935 can be pneumatically, electrically, or hydraulically driven, such as by a proportional electromagnet, offering fast response speed, high control precision, and easy high-speed linkage with the vision inspection system 91.

[0050] like Figure 7 As shown, the rotating cylinder 96 has sliding grooves 961 distributed along its circumference; the outer surface of the sliding member 933 is provided with a connecting seat 9331, the connecting seat 9331 extends radially along the sliding member 933 and passes through the sliding groove 961 to be rotatably connected to the end of the connecting rod 934.

[0051] When the adjustable push rod 935 pushes the slider 933 to move axially, the connecting seat 9331 moves synchronously with the slider 933 and slides along the sliding groove 961. The connecting seat 9331 passes through the sliding groove 961 and is rotatably connected to the end of the connecting rod 934, transmitting the axial movement of the slider 933 to the connecting rod 934. Because the sliding groove 961 guides and limits the movement of the connecting seat 9331, the connecting seat 9331 maintains a stable radial position during movement, ensuring that the transmission angle of the connecting rod 934 is consistent. When the rotating cylinder 96 rotates, the connecting seat 9331 moves circumferentially within the sliding groove 961 with the slider 933. The rotational connection between the connecting rod 934 and the connecting seat 9331 adapts to changes in relative angle and does not cause interference or jamming.

[0052] like Figure 7 and Figure 8As shown, the docking cylinder 922 located at the center is coaxial with and rotatably connected to the rotating cylinder 96; an external locking device is provided on the frame 95, which selectively locks with each of the chip removal plates 92 so that the chip removal plates 92 not connected to the docking pin 932 remain stationary relative to the other chip removal plates 92.

[0053] When the vision inspection system 91 detects excess blanks, the control system determines the number of blank removal plates 92 that need to be activated. The docking pin 932 extends and establishes a transmission connection with the docking cylinder 922 of the target layer. Simultaneously, the outer locking device activates, locking the blank removal plates 92 that do not need to be activated onto the frame 95, keeping them stationary. The drive shaft drives the rotating cylinder 96 to rotate. The blank removal plates 92 that have established a connection rotate synchronously with the rotating cylinder 96 to perform the blank removal action, while the blank removal plates 92 locked by the outer locking device do not participate in the rotation. After blank removal is completed, the docking pin 932 retracts, the outer locking device is released, and all blank removal plates 92 return to a free state, awaiting the next action.

[0054] like Figure 9 As shown, the outer periphery of the chip removal plate 92 is provided with V-shaped grooves 923 distributed along its circumference, and the number of V-shaped grooves 923 is the same as the number of chip removal openings 921; the outer locking device includes a locking rod 971, a locking head 972, and a first elastic element 973; the locking rod 971 is slidably disposed on the frame 95 along the radial direction of the chip removal plate 92; the locking head 972 is disposed at one end of the locking rod 971 facing the chip removal plate 92, and the locking head 972 forms a locking engagement with the V-shaped grooves 923; the first elastic element 973 is sleeved on the locking rod 971 and is located between the locking head 972 and the inner wall of the frame 95.

[0055] When the chip removal plate 92 is stationary, the first elastic element 973 pushes the locking rod 971 to move radially toward the chip removal plate 92, causing the locking head 972 to engage in the corresponding V-groove 923 on the outer periphery of the chip removal plate 92, forming a circumferential lock and preventing the chip removal plate 92 from rotating unexpectedly due to vibration or external force when not in operation. When the chip removal plate 92 needs to be driven to perform chip removal, the drive mechanism applies sufficient torque. As the chip removal plate 92 rotates, the inclined surface of the V-groove 923 pushes the locking head 972 outward against the elastic force of the first elastic element 973, and the locking head 972 slides out of the V-groove 923, allowing the chip removal plate 92 to enter a free rotation state. After chip removal is completed, the chip removal plate 92 rotates back to its original position, and the locking head 972, under the action of the first elastic element 973, re-engages in the corresponding V-groove 923, automatically restoring the lock.

[0056] like Figure 7As shown, an inner locking device is provided between two adjacent chip-removing plates 92; one of the chip-removing plates 92 has a mounting groove 924 on its side wall, which is parallel to the axis of the chip-removing plate 92; the other adjacent chip-removing plate 92 has a locking groove 925 on its side wall corresponding to the mounting groove 924; the inner locking device includes a second elastic element 981 and a ball 982, which are installed sequentially from the inside to the outside in the mounting groove 924, and the ball 982 partially protrudes from the mounting groove 924 and forms a locking engagement with the locking groove 925.

[0057] When the docking pin 932 simultaneously establishes a transmission connection with the docking cylinders 922 corresponding to two adjacent scraper plates 92, the inner locking device rigidly connects the two scraper plates 92 in the circumferential direction, ensuring synchronous rotation. The second elastic element 981 pushes the ball 982 to partially protrude and engage in the locking groove 925 of the adjacent scraper plate 92, eliminating the relative rotational clearance between the two scraper plates 92. During the torque transmission process of the docking pin 932, the inner locking device provides additional circumferential constraint, maintaining a stable connection between adjacent scraper plates 92 and preventing shaking or impact caused by clearance. When the docking pin 932 is connected to only one layer of scraper plates 92, due to the inclined surface cooperation between the ball 982 and the locking groove 925, the driven scraper plate 92 can overcome the elastic force of the second elastic element 981 to retract the ball 982, thereby achieving disengagement without affecting single-layer drive.

[0058] A method for magnetizing neodymium iron boron magnets, employing an apparatus for magnetizing neodymium iron boron magnets, includes the following steps: Step 1: The blank sheet and the gasket are alternately stacked by the stacking mechanism 3 to form a stacking group, and then conveyed to the stacking conveying channel 2; Step 2: The vision inspection system 91 acquires images of the stacked sheets in the stacked sheet conveying channel 2 in real time to identify whether there are extra blank sheets lacking spacers between adjacent blank sheets. Step 3: When the vision inspection system 91 detects the presence of excess blank pieces, it determines the number of blank removal plates 92 that need to be activated based on the number of excess blank pieces. The clutch transmission then connects the drive shaft to the corresponding number of blank removal plates 92. Step 4: The drive mechanism drives the stripping plate 92, which has established a transmission connection, to switch from the initial posture to the stripping posture through the drive shaft, so that the stripping port 921 removes the excess blank from the stacking conveying channel 2. Step 5: After the chip removal is completed, the drive mechanism drives the chip removal plate 92 to reset from the chip removal posture to the initial posture, and the clutch transmission disconnects the drive shaft from the chip removal plate 92. Step six: The stacking conveyor channel 2 continues to transport the qualified stacked pieces to the magnetizer 1, where the magnetizer 1 magnetizes the stacked pieces.

[0059] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An apparatus for magnetizing neodymium iron boron magnets, comprising a magnetizer, a lamination conveying channel, and a lamination mechanism; characterized in that, It also includes a stacked blank removal mechanism for identifying and removing excess blanks lacking spacers between adjacent blanks in a stacked blank group. The stacked blank removal mechanism includes: A visual inspection system is installed at the top of the stacking conveying channel to detect whether there are excess blanks in the stacking conveying channel that lack spacers between adjacent blanks; At least two stripping plates are disposed on one side of the stacking conveyor channel, and their thickness is the same as that of the blank sheet. Each stripping plate has a stripping opening. The stripping plate has an initial posture and a stripping posture. When the stripping plate is in the initial posture, the stripping opening is connected to the stacking conveyor channel. When the stripping plate is in the stripping posture, the stripping opening is disengaged from the stacking conveyor channel to remove excess blank sheets from the stacking conveyor channel. A drive mechanism is provided on one side of the stacked sheet conveying channel, and has a driver. The driver has a drive shaft, and a clutch transmission is provided between the drive shaft and each of the chip-removing plates. The drive shaft is selectively connected to a corresponding number of chip-removing plates through the clutch transmission. When the vision inspection system detects the presence of excess blank pieces, the clutch transmission connects the drive shaft to the corresponding number of the blank removal plates. The drive shaft drives the blank removal plates to switch from the initial posture to the blank removal posture, so as to remove the excess blank pieces from the stacked sheet conveying channel.

2. The device for magnetizing neodymium iron boron magnets according to claim 1, characterized in that, The chipping plate has a disc-shaped structure, and the chipping openings are distributed along the circumference of the chipping plate; when the drive shaft drives the chipping plate to rotate through the clutch transmission, the posture of the chipping plate changes.

3. The device for magnetizing neodymium iron boron magnets according to claim 1, characterized in that, The stacked chip removal mechanism also includes a chip removal push rod, which is disposed on one side of the chip removal plate, and the output rod of the chip removal push rod faces the chip removal opening when the chip removal plate is in the chip removal posture.

4. A device for magnetizing neodymium iron boron magnets according to claim 2 or 3, characterized in that, Each of the said chip-removing plates has a docking cylinder at its end, and the docking cylinders are coaxially arranged, with their inner diameters increasing sequentially from the inside to the outside. Each docking cylinder has a mating interface distributed along its circumference. The stacked chip-removing mechanism also includes a frame and a rotating cylinder rotatably mounted on the frame. The drive shaft is connected to the rotating cylinder. The clutch transmission includes a docking pin, which is radially movable on the rotating cylinder. By adjusting the extension length of the docking pin relative to the rotating cylinder, the docking pin can selectively dock with the mating interfaces on each of the said docking cylinders to achieve torque transmission.

5. The device for magnetizing neodymium iron boron magnets according to claim 4, characterized in that, The interface is located at the end of the docking cylinder, and the clutch actuator further includes: A sliding element is coaxially and slidably disposed inside the docking cylinder; The connecting rod has its two ends connected to the connecting pin and the sliding component respectively for transmission. An adjustable push rod is mounted on the frame, and its output rod is rotatably connected to the sliding member.

6. The device for magnetizing neodymium iron boron magnets according to claim 5, characterized in that, The rotating cylinder has sliding grooves distributed along its circumference; the outer surface of the sliding member is provided with a connecting seat, which extends radially along the sliding member and passes through the sliding groove to be rotatably connected to the end of the connecting rod.

7. The device for magnetizing neodymium iron boron magnets according to claim 4, characterized in that, The docking cylinder located at the center is coaxial with and rotatably connected to the rotating cylinder; an external locking device is provided on the frame, which selectively locks with each of the chip-removing plates to keep the chip-removing plates that are not connected to the docking pin in a stationary position relative to the other chip-removing plates.

8. The device for magnetizing neodymium iron boron magnets according to claim 7, characterized in that, The outer periphery of the chip-removing plate is provided with V-shaped grooves distributed along its circumference, the number of which is the same as the number of chip-removing openings; the outer locking device includes a locking rod, a locking head, and a first elastic element; the locking rod is slidably disposed on the frame along the radial direction of the chip-removing plate; the locking head is disposed at one end of the locking rod facing the chip-removing plate, and the locking head forms a locking engagement with the V-shaped grooves; the first elastic element is sleeved on the locking rod and is located between the locking head and the inner wall of the frame.

9. The device for magnetizing neodymium iron boron magnets according to claim 4, characterized in that, An inner locking device is provided between two adjacent chip-removing plates; one of the chip-removing plates has a mounting groove on its side wall, which is parallel to the axis of the chip-removing plate; the other adjacent chip-removing plate has a locking groove on its side wall corresponding to the mounting groove; the inner locking device includes a second elastic element and a ball, which are installed sequentially from the inside to the outside in the mounting groove, and the ball protrudes from the mounting groove and forms a locking engagement with the locking groove.

10. A method for magnetizing neodymium iron boron magnets, characterized in that, Using a device for magnetizing neodymium iron boron magnets as described in any one of claims 1-3, the method includes the following steps: Step 1: The blank sheet and the spacer are alternately stacked to form a stacked group by the stacking mechanism, and then conveyed to the stacking conveying channel; Step 2: The vision inspection system acquires images of the stacked sheets in the stacking conveyor channel in real time to identify whether there are extra blank sheets lacking spacers between adjacent blank sheets; Step 3: When the vision inspection system detects the presence of excess blanks, it determines the number of blank removal plates that need to be activated based on the number of excess blanks. The clutch transmission then connects the drive shaft to the corresponding number of blank removal plates. Step 4: The drive mechanism drives the stripping plate, which has established a transmission connection, to switch from the initial posture to the stripping posture via the drive shaft, so that the stripping nozzle removes the excess blanks from the stacking conveyor channel. Step 5: After the chip removal is completed, the drive mechanism drives the chip removal plate to reset from the chip removal posture to the initial posture, and the clutch transmission disconnects the transmission connection between the drive shaft and the chip removal plate. Step six: The stacking conveyor continues to transport the qualified stacks to the magnetizer, where the magnetizer magnetizes the stacks.

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