Magnetizing device and production process of large circular ring magnetic steel

Abstract

The invention discloses a large circular ring magnetic steel magnetizing device and a production process, the magnetizing device comprises a magnetizing mechanism, a positioning mechanism and a monitoring control mechanism, the magnetizing mechanism comprises a rotation driving part, a turntable, a plurality of first electromagnets, a plurality of second electromagnets and an electrifying assembly; the positioning mechanism is used for transferring to-be-magnetized large circular ring magnetic steel to a position above the turntable, concentric with the turntable and located between the first electromagnet and the second electromagnet; the monitoring control mechanism comprises a Hall sensor assembly and a controller. According to the application, due to the special layout of the first electromagnet and the second electromagnet in the magnetizing mechanism and the positive and negative rotation mode of the turntable, each part of the large circular ring magnetic steel can be uniformly acted by a magnetic field in the magnetizing process. And the angle between the adjacent electromagnets is matched with the rotating angle of the turntable, so that the magnetization degrees of all points in the circumferential direction of the magnetic steel are consistent, and the problem of insufficient or excessive local magnetization is avoided.

Description

Technical Field

[0001] This application relates to the field of magnetization and production of magnetic steel, specifically to a magnetization device and production process for a large circular ring magnetic steel. Background Technology

[0002] Large-ring magnets, as core components of high-end equipment such as permanent magnet motors and magnetic levitation bearings, play a crucial role in the industrial field. With continuous technological advancements, the requirements for operational stability in high-end equipment are increasingly stringent, and the uniformity of the magnetic properties of large-ring magnets directly affects the operational stability of these devices. Therefore, improving the uniformity of the magnetic properties of large-ring magnets has become a key research direction in mechanical manufacturing, electronic engineering, and other related fields, which is of great significance for promoting the development of the high-end equipment manufacturing industry.

[0003] In the traditional production process of large-ring magnets, a conventional constant magnetic field magnetization process is used to magnetize the magnets. Furthermore, a constant current magnetization method is employed to complete the magnetization process. In the magnet positioning stage, a forklift is typically used to transfer the magnet, and then manual adjustment is required to ensure the concentricity between the magnet and the magnetization equipment.

[0004] However, traditional magnetization processes have significant drawbacks. The conventional constant magnetic field distribution in large circular magnets is uneven along the inner and outer diameters and circumferential direction, especially with a weaker magnetic field at the outer edge, resulting in low consistency in magnetic properties. Furthermore, constant current magnetization not only has a long magnetization time per piece but also suffers from high energy consumption. Additionally, manual adjustment of the concentricity between the magnet and the magnetization equipment can lead to large deviations, severely impacting the consistency of the magnetization effect. Summary of the Invention

[0005] In order to solve the technical problems in the prior art, this application provides a magnetization device and manufacturing process for a large circular ring magnet.

[0006] The magnetization device and manufacturing process for a large circular ring magnet provided in this application adopt the following technical solution: A magnetization device and manufacturing process for a large circular ring magnet, comprising: A magnetization mechanism includes a rotary drive, a turntable, a plurality of first electromagnets, a plurality of second electromagnets, and an energizing component. The turntable is fixed to the movable end of the rotary drive. Each of the first electromagnets and each of the second electromagnets are arranged on the turntable. Each of the first electromagnets is arranged in a circular array around the center of the turntable, and each of the second electromagnets is also arranged in a circular array around the center of the turntable, corresponding one-to-one with each of the first electromagnets and arranged opposite to each other. When energized, the magnetic properties of the opposite ends of the first electromagnets and the corresponding second electromagnets are opposite. The energizing component is used to energize each of the first electromagnets and each of the second electromagnets. A positioning mechanism is used to transfer the large circular magnet to be magnetized to a position above the turntable, concentric with the turntable and located between the first electromagnet and the second electromagnet. The monitoring and control mechanism includes a Hall sensor assembly and a controller. The Hall sensor assembly is arranged in a circular array around the center of the turntable and is used to detect the magnetic field strength of the large circular magnet. The controller is communicatively connected to the Hall sensor assembly and the energizing assembly and is used to adjust the current applied to each of the first electromagnets and each of the second electromagnets according to the magnetic field strength of the large circular magnet.

[0007] In some embodiments, the magnetization mechanism further includes a plurality of first position adjusting members and a plurality of second position adjusting members. The first position adjusting members correspond one-to-one with the first electromagnets and are used to move the corresponding first electromagnets toward or away from the center of the turntable. The second position adjusting members correspond one-to-one with the second electromagnets and are used to move the corresponding second electromagnets toward or away from the center of the turntable.

[0008] In some embodiments, the first position adjusting member includes a first fixed plate, two first mounting blocks, a first slider, a first lead screw, a first rotation drive member, and a first column. The first fixed plate is fixed to the turntable, the two first mounting blocks are respectively fixed to both ends of the first fixed plate, the first slider is slidably disposed on the first fixed plate, the first slider has a first screw hole, the two ends of the first lead screw are respectively rotatably disposed on the two first mounting blocks and are threadedly connected to the first screw hole, the first rotation drive member is connected to the first lead screw and is used to drive the first lead screw to rotate, the first column is fixed to the first slider, and the first electromagnet is mounted on the first column.

[0009] In some embodiments, the second position adjusting member includes a second fixed plate, two second mounting blocks, a second slider, a second lead screw, a second rotation drive member, and a second column. The second fixed plate is fixed to the turntable, the two second mounting blocks are respectively fixed to both ends of the second fixed plate, the second slider is slidably disposed on the second fixed plate, and a second screw hole is provided on the second slider. The two ends of the second lead screw are respectively rotatably disposed on the two second mounting blocks and are threadedly connected to the second screw hole. The second rotation drive member is connected to the second lead screw and is used to drive the second lead screw to rotate. The second column is fixed to the second slider, and the second electromagnet is mounted on the second column.

[0010] In some embodiments, the Hall sensor assembly includes a plurality of first Hall sensors and a plurality of second Hall sensors, wherein the first Hall sensors are fixed in a first mounting groove on the side wall of the first column, and the second Hall sensors are fixed in a second mounting groove on the side wall of the second column.

[0011] In some embodiments, the positioning mechanism includes a track, a trolley, a lifting device, and a circumferential clamping assembly. The track is mounted above the rotary drive member, the trolley can move along the track, the fixed end of the lifting device is fixed to the trolley, and the movable end of the lifting device is connected to a large circular magnet via a lifting rope. The circumferential clamping assembly includes a plurality of clamping members, each of which is arranged in a circumferential array around the center of the turntable and is used to abut against the outer side wall of the large circular magnet connected by the lifting rope.

[0012] In some embodiments, the clamping member includes a fixed column, a cylinder, and a clamping block. The fixed end of the cylinder is fixed to the fixed column. Each of the cylinders is arranged in a circumferential array around the center of the turntable. The movable end of the cylinder is fixedly connected to the clamping block. The clamping block is used to abut against the outer wall of the large circular magnet. The air inlet end of the cylinder of each clamping member is connected to the same air source.

[0013] In some embodiments, the lifting device is used to control the height of the large circular magnet connected to it, so that the center height of the large circular magnet is equal to the center height of each first electromagnet and each second electromagnet.

[0014] In some embodiments, when the Hall sensor assembly detects that the magnetic induction intensity of a certain region of the large circular magnet is lower than a target threshold, the controller controls the energizing assembly to apply pulse magnetization to the electromagnet corresponding to that region individually.

[0015] This application also provides a manufacturing process for large circular ring magnets, including the following steps: S1. Shape the sand mold according to the preset inner diameter, outer diameter and height to obtain the mold; S2. Molten steel is poured into multiple molds in series using a cascade casting method; S3. After casting and molding, let it stand for a preset time. After the magnet in the mold has formed and cooled, remove the magnet. The magnet is magnetized by the magnetization device for the magnetized large circular magnet. After magnetization, the magnet is sent to a tempering furnace for tempering. After tempering, it is cooled to the preset temperature in the furnace to obtain a large circular ring magnet product.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. The special arrangement of the first and second electromagnets in the magnetization mechanism, along with the forward and reverse rotation of the turntable, ensures that all parts of the large circular magnet are uniformly subjected to the magnetic field during the magnetization process. The angle settings between adjacent electromagnets and the rotation angle of the turntable are coordinated to ensure consistent magnetization at all points along the circumference of the magnet, avoiding problems of insufficient or excessive local magnetization.

[0017] 2. The monitoring and control mechanism detects the magnetic field strength of the magnet in real time through the Hall sensor assembly. When the magnetic field strength in a certain area is found to be lower than the target threshold, the corresponding electromagnet in that area is promptly subjected to pulse magnetization, and the current magnitude is adjusted to further improve the uniformity of magnetization.

[0018] 3. The first and second position adjusting components in the magnetization mechanism can flexibly adjust the positions of the first and second electromagnets according to large circular ring magnets of different sizes, ensuring that the magnets are magnetized in the optimal magnetic field environment and improving the magnetization quality.

[0019] 4. The positioning mechanism, consisting of a crane, a lifting device, and a circumferential clamping assembly, works in concert to accurately place the large circular magnet at the appropriate magnetization position. The crane enables horizontal movement and hoisting of the magnet, the lifting device controls the magnet's lifting and height adjustment, and the circumferential clamping assembly clamps the magnet and ensures its stable position, aligning the center height of the magnet with that of the electromagnet, thus providing a foundation for high-quality magnetization.

[0020] 5. The series casting method improves production efficiency, the magnetization device ensures the uniformity of the magnetic properties of the magnets, and the tempering and furnace cooling processes eliminate internal stress and stabilize the magnetic properties. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the magnetization device for a large circular magnet provided in one embodiment of this application; Figure 2 yes Figure 1 The magnetization device of the large circular magnet in the diagram omits the track and the structure after the vehicle has traveled; Figure 3 yes Figure 2 A schematic diagram of the circumferential clamping assembly in the middle; Figure 4 yes Figure 1 A schematic diagram of the magnetization mechanism in the diagram; Figure 5 yes Figure 4 A magnified view of a portion of region A in the middle; Figure 6 yes Figure 4 A top view of the magnetization mechanism; Figure 7 yes Figure 6A schematic diagram of the structure of a first electromagnet and a second electromagnet in the diagram; Explanation of reference numerals in the attached drawings: 1. Magnetizing mechanism; 11. Rotary drive component; 12. Turntable; 13. First electromagnet; 14. Second electromagnet; 15. First position adjustment component; 151. First fixing plate; 152. First mounting block; 153. First slider; 154. First lead screw; 155. First rotation drive component; 156. First column; 16. Second position adjustment component; 161. Second fixing plate; 162. Second mounting block; 163. Second slider; 164. Second lead screw; 165. Second rotation drive component; 166. Second column; 2. Positioning mechanism; 21. Track; 22. Crane; 23. Lifting device; 24. Circumferential clamping assembly; 241. Fixing column; 242. Cylinder; 243. Clamping block; 25. Lifting rope; 3. Monitoring and control mechanism; 31. First Hall sensor; 32. Second Hall sensor; 4. Large circular magnet. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of the present invention, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of the present invention without creative effort are also within the protection scope of the present invention.

[0023] This application mainly adopts magnetization devices and production processes to optimize the quality of large circular ring magnets 4, thereby improving the uniformity of magnetic properties, production efficiency and quality stability of large circular ring magnets 4. The following is a further detailed description of this application.

[0024] Example 1

[0025] Please refer to Figures 1-7 The magnetization device for the large circular magnet 4 provided in this application includes a magnetization mechanism 1, a positioning mechanism 2, and a monitoring and control mechanism 3. The magnetization mechanism 1 is responsible for magnetizing the large circular magnet 4 to be magnetized. The positioning mechanism 2 accurately places the large circular magnet 4 to be magnetized into a suitable magnetization position. The monitoring and control mechanism 3 monitors the magnetic field strength of the large circular magnet 4 in real time and adjusts the magnetization current, thereby improving the uniformity and quality of magnetization of the large circular magnet 4. This is because the special layout and rotation setting of the magnetization mechanism 1 can make all parts of the magnet uniformly magnetized, the positioning mechanism 2 ensures that the magnet is accurately positioned, and the monitoring and control mechanism 3 can adjust the current according to the actual magnetic field conditions.

[0026] For details, please refer to Figure 2 and Figure 4The magnetization mechanism 1 includes a rotary drive 11, a turntable 12, several first electromagnets 13, several second electromagnets 14, and an energizing assembly. The rotary drive 11 is the foundation for the operation of the entire magnetization mechanism 1. It generally consists of a base and a movable end, which can rotate at a constant speed, for example, using a motor-driven rotary shaft structure. The turntable 12 is fixed to the movable end of the rotary drive 11. When the rotary drive 11 operates, the turntable 12 rotates along with it. The turntable 12 is typically a circular flat plate structure, made of high-strength aluminum alloy or steel to ensure stability when supporting components such as electromagnets. Each first electromagnet 13 and each second electromagnet 14 is arranged on the turntable 12; they are key components for achieving the magnetization function. The first electromagnets 13 and second electromagnets 14 generally employ a structure of coils wound around an iron core, which generate a magnetic field when energized. Each first electromagnet 13 is arranged in a circular array around the center of the turntable 12, and each second electromagnet 14 is also arranged in a circular array around the center of the turntable 12, corresponding one-to-one with each of the first electromagnets 13 and positioned opposite each other. This arrangement ensures that the large circular magnet 4 is subjected to a uniform and opposing magnetic field during magnetization. When energized, the opposite ends of the first electromagnets 13 and their corresponding second electromagnets 14 exhibit opposite magnetism, enhancing the magnetization effect on the large circular magnet 4. In this embodiment, as shown... Figure 6 and Figure 7 As shown, the black portion of each electromagnet represents the S pole, and the white portion represents the N pole. The energizing assembly is used to energize each of the first electromagnets 13 and each of the second electromagnets 14. It can be a power distribution device that transmits electrical energy to each electromagnet via wires and can adjust the current magnitude and switching on / off as needed. For example, in some cases, the energizing assembly can employ a programmable power controller, capable of precisely controlling the energizing parameters of each electromagnet.

[0027] For details, please refer to Figures 2-7 The magnetization mechanism 1 also includes several first position adjusting members 15 and several second position adjusting members 16. Each first position adjusting member 15 corresponds to a first electromagnet 13 and is used to move the corresponding first electromagnet 13 toward or away from the center of the turntable 12. Each second position adjusting member 16 corresponds to a second electromagnet 14 and is used to move the corresponding second electromagnet 14 toward or away from the center of the turntable 12. This arrangement can accommodate the magnetization requirements of large circular magnets 4 of different sizes.

[0028] The first position adjusting component 15 includes a first fixed plate 151, two first mounting blocks 152, a first slider 153, a first lead screw 154, a first rotation drive component 155, and a first column 156. The first fixed plate 151 is fixed to the turntable 12, providing the mounting base for the entire first position adjusting component 15. It is typically a flat metal plate, fixed to the turntable 12 by bolts or welding. The two first mounting blocks 152 are respectively fixed to both ends of the first fixed plate 151, serving to support the first lead screw 154. They can be block-shaped metal structures, connected to the first fixed plate 151 by bolts. The first slider 153 is slidably disposed on the first fixed plate 151, and has a first screw hole for engaging with the first lead screw 154 to achieve movement. The first slider 153 is generally made of wear-resistant metal material with a smooth surface to reduce friction with the first fixed plate 151. The two ends of the first lead screw 154 are rotatably mounted on two first mounting blocks 152 and threadedly connected to the first screw holes. When the first lead screw 154 rotates, the first slider 153 moves along the first fixed plate 151. The first rotation drive 155 is connected to the first lead screw 154 and is used to drive the first lead screw 154 to rotate. It can be a small motor connected to the first lead screw 154 through a coupling. The first column 156 is fixed to the first slider 153, and the first electromagnet 13 is mounted on the first column 156. Thus, when the first slider 153 moves, the first electromagnet 13 also moves accordingly.

[0029] The second position adjusting member 16 is similar in structure to the first position adjusting member 15, including a second fixing plate 161, two second mounting blocks 162, a second slider 163, a second lead screw 164, a second rotation driving member 165, and a second column 166. Its working principle and the function of each component are the same as those of the first position adjusting member 15, except that it is used to adjust the position of the second electromagnet 14.

[0030] For details, please refer to Figures 1-3 The positioning mechanism 2 includes a track 21, a trolley 22, a lifting device 23, and a circumferential clamping assembly 24. The track 21 is mounted above the rotary drive component 11. The trolley 22 can move along the track 21. The fixed end of the lifting device 23 is fixed to the trolley 22, and the movable end of the lifting device 23 is connected to the large circular magnet 4 via a lifting rope 25. The circumferential clamping assembly 24 includes several clamping members, each arranged in a circular array around the center of the turntable 12, and each used to abut against the outer wall of the large circular magnet 4 connected by the lifting rope 25. The lifting device 23 can be an electric hoist or a hydraulic lifting device, etc., which can control the lifting and lowering and position adjustment of the large circular magnet 4. The circumferential clamping assembly 24 includes several clamping members, each arranged in a circular array around the center of the turntable 12, and each used to abut against the outer wall of the large circular magnet 4 connected by the lifting rope 25.

[0031] The clamping components include a fixed post 241, a cylinder 242, and a clamping block 243. The fixed end of the cylinder 242 is fixed to the fixed post 241. All cylinders 242 are arranged in a circular array around the center of the turntable 12. The movable end of the cylinder 242 is fixedly connected to the clamping block 243, which abuts against the outer wall of the large circular magnet 4. The air inlet of each cylinder 242 is connected to the same air source (e.g., an air pump). When the air source supplies air, the cylinder 242 pushes the clamping block 243 to slowly extend, clamping the large circular magnet 4. Since all cylinders 242 are connected to the same air source, the extension length of the drive shaft of each cylinder 242 is equal. Therefore, it can be ensured that the large circular magnet 4 is located at the center of the turntable 12 when clamped, ensuring the stability of the magnet's position during the magnetization process. The lifting device 23 is also used to control the height of the large circular magnet 4 connected to it, so that the center height of the large circular magnet 4 is equal to the center height of each first electromagnet 13 and each second electromagnet 14, ensuring that the magnet is in the optimal magnetization position.

[0032] For details, please refer to Figures 2-5 The monitoring and control mechanism 3 includes a Hall sensor assembly and a controller. The Hall sensor assembly is arranged in a circular array around the center of the turntable 12 and is used to detect the magnetic field strength of the large circular magnet 4. The Hall sensor assembly includes several first Hall sensors 31 and several second Hall sensors 32. The first Hall sensors 31 are fixed in a first mounting groove on the side wall of the first column 156, and the second Hall sensors 32 are fixed in a second mounting groove on the side wall of the second column 166. The Hall sensors are magnetic field detection elements based on the Hall effect, capable of converting magnetic field strength into an electrical signal. The controller is communicatively connected to the Hall sensor assembly and the power-on assembly, and is used to adjust the current flowing through each of the first electromagnets 13 and each of the second electromagnets 14 according to the magnetic field strength of the large circular magnet 4. When the Hall sensor assembly detects that the magnetic induction intensity of a certain area of ​​the large circular magnet 4 is lower than the target threshold, the controller controls the energizing assembly to apply pulse magnetization to the electromagnet corresponding to that area individually in order to enhance the magnetic field strength of that area and improve the magnetization uniformity. It should be understood that in order to avoid the influence of the first electromagnet 13 and the second electromagnet 14 on the detection results, all the first electromagnet 13 and the second electromagnet 14 should be de-energized during the detection.

[0033] The working process of this embodiment includes: (1) Positioning stage: The magnet is hoisted from the storage area to above the turntable 12 by the overhead crane 22. After the magnet is hoisted to a suitable position above the turntable 12, the air source supplies air to each cylinder 242. The moving end of the cylinder 242 pushes the clamping block 243 to extend. The clamping block 243 abuts against the outer wall of the large circular magnet 4, clamping the magnet tightly. At the same time, the lifting device 23 adjusts the height of the magnet so that the center height of the magnet is equal to the center height of the first electromagnet 13 and the second electromagnet 14, ensuring that the magnet is in the optimal magnetization position.

[0034] (2) Adaptation Stage: For large circular magnets 4 of different sizes, the first position adjustment component 15 starts working. The first rotation drive component 155 (small motor) starts, driving the first lead screw 154 to rotate. Since the first lead screw 154 is rotatably connected to the first screw hole on the first slider 153, the first slider 153 will slide along the first fixed plate 151. The first column 156 is fixed on the first slider 153, and the first electromagnet 13 is installed on the first column 156, so the movement of the first slider 153 will drive the first electromagnet 13 to move toward or away from the center of the turntable 12 to adapt to the inner diameter of the magnet. The working principle of the second position adjustment component 16 is the same as that of the first position adjustment component 15. The second rotation drive component 165 drives the second lead screw 164 to rotate, causing the second slider 163 to slide along the second fixed plate 161, thereby driving the second electromagnet 14 to move toward or away from the center of the turntable 12 to adapt to the outer diameter of the magnet.

[0035] (3) Magnetization stage: The motor driving the rotating shaft of the rotating drive component 11 drives the movable end to rotate at a constant speed, and the turntable 12 fixed to the movable end rotates accordingly. In this embodiment, the turntable 12 rotates in a pattern of first rotating 45° clockwise and then 45° counterclockwise. This is because, in this embodiment, there are 8 first electromagnets 13 and 8 second electromagnets 14, and the angle between adjacent first electromagnets 13 (or second electromagnets 14) is 45°. Every 45° rotation returns to the equivalent initial position. This clockwise and counterclockwise rotation pattern facilitates the arrangement of wires connected to the electromagnets, while ensuring uniform magnetization of all parts of the large magnet. When the turntable 12 rotates, the energizing component energizes each of the first electromagnets 13 and second electromagnets 14. The first electromagnets 13 and second electromagnets 14 adopt a structure of coils wound with an iron core, which generates a magnetic field after being energized. Each first electromagnet 13 is arranged in a circular array around the center of the turntable 12, and each second electromagnet 14 is also arranged in a circular array around the center of the turntable 12, corresponding one-to-one with the first electromagnets 13 and set opposite to each other. When energized, the magnetic properties of the opposite ends of the first electromagnets 13 and the corresponding second electromagnets 14 are opposite, forming a uniform and opposite magnetic field in the area where the large circular magnet 4 is located, thus enhancing the magnetization effect.

[0036] (4) Monitoring and Adjustment Stage: After the first magnetization (all electromagnets are de-energized during detection to avoid interference), the Hall sensor assembly begins to work. The first Hall sensor 31 is fixed in the first mounting slot on the side wall of the first column 156, and the second Hall sensor 32 is fixed in the second mounting slot on the side wall of the second column 166. They are arranged in a circular array around the center of the turntable 12 to detect the magnetic field strength of the large circular magnet 4 in real time and convert the magnetic field strength into an electrical signal. During detection, the motor of the rotating drive component 11 drives the rotating shaft to rotate the movable end at a uniform speed, thereby also driving each Hall sensor assembly to rotate, which facilitates the detection of the magnetic field strength at various positions of the large circular magnet 4. The controller receives the electrical signal from the Hall sensor assembly and compares it with the target threshold. When the magnetic induction intensity of a certain area of ​​the large circular magnet 4 is detected to be lower than the target threshold, the controller controls the energizing component to apply pulse magnetization to the electromagnet corresponding to that area separately, and adjusts the magnitude of the current to enhance the magnetic field strength of that area and improve the magnetization uniformity.

[0037] The technical effects of this embodiment include: 1. The special layout of the first electromagnet 13 and the second electromagnet 14 in the magnetization mechanism 1, as well as the forward and reverse rotation mode of the turntable 12, ensures that all parts of the large circular magnet 4 are uniformly subjected to the magnetic field during the magnetization process. The angle setting between adjacent electromagnets and the rotation angle of the turntable 12 are matched to ensure that the magnetization degree of each point in the circumference of the magnet is consistent, avoiding the problem of insufficient or excessive local magnetization.

[0038] 2. The monitoring and control mechanism 3 detects the magnetic field strength of the magnet in real time through the Hall sensor assembly. When it finds that the magnetic field strength in a certain area is lower than the target threshold, it promptly applies pulse magnetization to the electromagnet corresponding to that area and adjusts the current magnitude to further improve the uniformity of magnetization.

[0039] 3. The first position adjustment component 15 and the second position adjustment component 16 in the magnetization mechanism 1 can flexibly adjust the positions of the first electromagnet 13 and the second electromagnet 14 according to the large circular ring magnets 4 of different sizes, so as to ensure that the magnets are magnetized in the best magnetic field environment and improve the magnetization quality.

[0040] 4. The trolley 22, lifting device 23, and circumferential clamping assembly 24 of the positioning mechanism 2 work together to accurately place the large circular magnet 4 into the appropriate magnetization position. The trolley 22 realizes horizontal movement and hoisting of the magnet, the lifting device 23 controls the lifting and height adjustment of the magnet, and the circumferential clamping assembly 24 clamps the magnet and ensures its stable position, so that the center height of the magnet is consistent with the center height of the electromagnet, providing a foundation for high-quality magnetization.

[0041] Example 2

[0042] The difference between this embodiment and the previous embodiment is that the circumferential clamping assembly 24 in the positioning mechanism 2 uses a mechanical transmission clamping method instead of a cylinder clamping method. This circumferential clamping assembly 24 includes several clamping components, arranged in a circular array around the center of the turntable 12. Each clamping component includes a fixed post 241, a lead screw and nut pair, and a clamping block 243. The lead screw of the lead screw and nut pair is rotatably mounted on the fixed post 241, and one end of the lead screw is connected to a manual rotating wheel or a motor. The nut is fixedly connected to the clamping block 243. When the lead screw is rotated, the nut drives the clamping block 243 to move along the axis of the lead screw, thereby clamping the outer wall of the large circular magnet 4. This mechanical transmission clamping method has a simple structure and is easy to maintain, making it suitable for applications where automation requirements are not high.

[0043] The implementation principle of this embodiment is as follows: the circumferential clamping assembly 24, which uses mechanical transmission, can also achieve the positioning and clamping functions of the large circular magnet 4. The movement of the clamping block 243 is controlled by rotating the lead screw, resulting in a stable and reliable structure with low cost. In situations where frequent and rapid clamping operations are not required, this method can meet production needs, reduces reliance on auxiliary equipment such as air sources, lowers equipment complexity and operating costs, and improves equipment adaptability.

[0044] Example 3

[0045] The manufacturing process of the large circular magnet 4 provided in this application embodiment includes the following steps: S1. The sand mold is shaped according to the preset inner diameter, outer diameter, and height to obtain the mold. In this process, the shape and size of the sand mold must first be determined, usually by manual shaping, to design the mold to meet the dimensional requirements of the large circular magnet 4. Aluminum is generally chosen as the material for the sand mold because it has good casting properties and thermal conductivity. During shaping, the precision and surface quality of the sand mold must be ensured to guarantee the quality of the subsequently cast magnet.

[0046] S2. A series casting method is used to pour molten steel into multiple molds in series. This method improves production efficiency by connecting multiple molds sequentially, allowing molten steel to flow continuously into each mold. Before pouring, the molten steel must be melted and refined to ensure its composition and quality meet requirements. Simultaneously, the pouring speed and temperature must be carefully controlled to avoid defects such as porosity and wall shrinkage.

[0047] S3. After casting, allow the mold to stand for a preset time until the magnets inside the mold have formed and cooled. Then remove the magnets. The setting of the standing time depends on factors such as the size of the sand mold, the composition of the molten steel, and the casting temperature, and generally ranges from tens of minutes to several hours. During the standing process, pay attention to controlling the cooling order of the product and the cap, allowing the product to cool first and the cap to cool later. This ensures that the product receives sufficient shrinkage compensation from the cap during cooling, preventing porosity or shrinkage. Then carefully tap open the sand mold outside the product to accelerate its cooling. At the same time, insulate the cap to ensure that it solidifies slower than the product.

[0048] The magnet is magnetized using the magnetization device for the large circular magnet 4 described in the previous embodiment. During magnetization, the rotating drive 11 of the magnetization device drives the turntable 12 to rotate back and forth at a uniform speed, so that each part of the magnet passes between the first electromagnet 13 and the second electromagnet 14 in sequence, improving the uniformity of magnetization. After magnetization, the monitoring and control mechanism 3 monitors the magnetic field strength of the magnet in real time and adjusts the current of the electromagnets according to the actual situation, supplementing pulse magnetization in areas with insufficient magnetic field strength.

[0049] After magnetization, the magnets are placed in a tempering furnace for tempering. After tempering, they are cooled in the furnace to the preset temperature to obtain product 4, a large circular ring magnet. The purpose of tempering is to eliminate residual stress after magnetization, stabilize the magnetic domain structure, and prevent cracking and deformation. Cooling in the furnace to room temperature is crucial; if the product is not cooled in the furnace and is removed directly, it will crack due to rapid cooling. The entire tempering and cooling process takes several days and must be strictly followed according to the process requirements.

[0050] The implementation principle of this embodiment is as follows: The production process of the large circular ring magnet 4 integrates multiple stages such as sand mold molding, cascade casting, magnetization, and tempering. Each stage is closely linked to ensure the quality of the large circular ring magnet 4. Sand mold molding provides the foundation for subsequent casting, cascade casting improves production efficiency, the magnetization device ensures the uniformity of the magnet's magnetic properties, and tempering and furnace cooling processes eliminate internal stress and stabilize the magnetic properties. Compared with traditional production processes, this process solves problems such as poor magnetization uniformity, low efficiency, inaccurate positioning, and easy cracking of products, improving the quality and performance of the large circular ring magnet 4, and has significant economic and social benefits.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A magnetization device for a large circular ring magnet, characterized in that, include: The magnetization mechanism (1) includes a rotary drive (11), a turntable (12), a plurality of first electromagnets (13), a plurality of second electromagnets (14), and an energizing component. The turntable (12) is fixed to the movable end of the rotary drive (11). Each of the first electromagnets (13) and each of the second electromagnets (14) are arranged on the turntable (12). Each of the first electromagnets (13) is arranged in a circumferential array around the center of the turntable (12), and each of the second electromagnets (14) is also arranged in a circumferential array around the center of the turntable (12). They correspond one-to-one with each of the first electromagnets (13) and are arranged opposite to each other. When energized, the magnetic properties of the two ends of the first electromagnet (13) and the corresponding second electromagnet (14) are opposite. The energizing component is used to energize each of the first electromagnets (13) and each of the second electromagnets (14). Positioning mechanism (2) is used to transfer the large circular magnet (4) to be magnetized to a position above the turntable (12), concentric with the turntable (12) and located between the first electromagnet (13) and the second electromagnet (14); The monitoring and control mechanism (3) includes a Hall sensor assembly and a controller. The Hall sensor assembly is arranged in a circular array around the center of the turntable (12) and is used to detect the magnetic field strength of the large circular magnet (4). The controller is communicatively connected to the Hall sensor assembly and the power-on assembly and is used to adjust the current magnitude of each first electromagnet (13) and each second electromagnet (14) according to the magnetic field strength of the large circular magnet (4).

2. The magnetization device for the large circular ring magnet according to claim 1, characterized in that, The magnetization mechanism (1) further includes a plurality of first position adjustment members (15) and a plurality of second position adjustment members (16). The first position adjustment members (15) correspond one-to-one with the first electromagnets (13) and are used to move the corresponding first electromagnets (13) toward or away from the center of the turntable (12). The second position adjustment members (16) correspond one-to-one with the second electromagnets (14) and are used to move the corresponding second electromagnets (14) toward or away from the center of the turntable (12).

3. The magnetization device for the large circular ring magnet according to claim 2, characterized in that, The first position adjustment component (15) includes a first fixed plate (151), two first mounting blocks (152), a first slider (153), a first lead screw (154), a first rotation drive component (155), and a first column (156). The first fixed plate (151) is fixed to the turntable (12). The two first mounting blocks (152) are respectively fixed to the two ends of the first fixed plate (151). The first slider (153) is slidably disposed on the first fixed plate (151). A first screw hole is provided on the first slider (153). The two ends of the first lead screw (154) are respectively rotatably disposed on the two first mounting blocks (152) and are threadedly connected to the first screw hole. The first rotation drive component (155) is connected to the first lead screw (154) and is used to drive the first lead screw (154) to rotate. The first column (156) is fixed to the first slider (153). The first electromagnet (13) is installed on the first column (156).

4. The magnetization device for the large circular ring magnet according to claim 3, characterized in that, The second position adjustment component (16) includes a second fixed plate (161), two second mounting blocks (162), a second slider (163), a second lead screw (164), a second rotation drive component (165), and a second column (166). The second fixed plate (161) is fixed to the turntable (12). The two second mounting blocks (162) are respectively fixed to the two ends of the second fixed plate (161). The second slider (163) is slidably disposed on the second fixed plate (161). A second screw hole is provided on the second slider (163). The two ends of the second lead screw (164) are respectively rotatably disposed on the two second mounting blocks (162) and are threadedly connected to the second screw hole. The second rotation drive component (165) is connected to the second lead screw (164) and is used to drive the second lead screw (164) to rotate. The second column (166) is fixed to the second slider (163). The second electromagnet (14) is mounted on the second column (166).

5. The magnetization device for the large circular ring magnet according to claim 4, characterized in that, The Hall sensor assembly includes a plurality of first Hall sensors (31) and a plurality of second Hall sensors (32). The first Hall sensors (31) are fixed in a first mounting groove on the side wall of the first column (156), and the second Hall sensors (32) are fixed in a second mounting groove on the side wall of the second column (166).

6. The magnetizing device for a large circular ring magnet according to claim 1, characterized in that, The positioning mechanism (2) includes a track (21), a trolley (22), a lifting device (23), and a circumferential clamping assembly (24). The track (21) is mounted above the rotary drive (11). The trolley (22) can move along the track (21). The fixed end of the lifting device (23) is fixed to the trolley (22). The movable end of the lifting device (23) is connected to the large circular magnet (4) via a lifting rope (25). The circumferential clamping assembly (24) includes several clamping members. Each clamping member is arranged in a circumferential array around the center of the turntable (12) and is used to abut against the outer wall of the large circular magnet (4) connected by the lifting rope (25).

7. The magnetization device for the large circular ring magnet according to claim 6, characterized in that, The clamping components include a fixed post (241), a cylinder (242), and a clamping block (243). The fixed end of the cylinder (242) is fixed to the fixed post (241). Each cylinder (242) is arranged in a circumferential array around the center of the turntable (12). The movable end of the cylinder (242) is fixedly connected to the clamping block (243). The clamping block (243) is used to abut against the outer wall of the large circular magnet (4). The air inlet end of each clamping component's cylinder (242) is connected to the same air source.

8. The magnetizing device for a large circular ring magnet according to claim 6, characterized in that, The lifting device (23) is used to control the height of the large circular magnet (4) connected to it, so that the center height of the large circular magnet (4) is equal to the center height of each first electromagnet (13) and each second electromagnet (14).

9. The magnetizing device for a large circular ring magnet according to claim 1, characterized in that, When the Hall sensor assembly detects that the magnetic induction intensity of a certain area of ​​the large circular ring magnet (4) is lower than the target threshold, the controller controls the energizing assembly to apply pulse magnetization to the electromagnet corresponding to that area individually.

10. A manufacturing process for large circular ring magnets, characterized in that, Includes the following steps: S1. Shape the sand mold according to the preset inner diameter, outer diameter and height to obtain the mold; S2. Use a series casting method to connect multiple molds in series to pour molten steel; S3. After casting and molding, let it stand for a preset time. After the magnet in the mold has formed and cooled, remove the magnet. The magnet is magnetized by the magnetization device for magnetizing the large circular magnet (4) as described in any one of claims 1-9; After magnetization, the magnet is sent to a tempering furnace for tempering. After tempering, it is cooled to the preset temperature in the furnace to obtain the large circular ring magnet (4) product.

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