Four-station Halbach multi-pole magnetic ring charging and testing all-in-one machine

Abstract

The invention belongs to the technical field of magnetizers, and relates to a four-station Halbach multi-pole magnetic ring charging and measuring all-in-one machine which comprises a feeding station, a four-layer charging and measuring station, a discharging station, a workbench, an upper clamping jaw assembly and a lower supporting and grabbing assembly. The working table comprises an upper table top and a lower table top, and the feeding station, the four-layer filling and measuring station and the discharging station are arranged on the upper table top; the four-layer charging and measuring station comprises a four-station permanent magnet guiding and positioning layer, a four-station magnetizing coil layer, a four-station magnetic flux measuring layer and a four-station surface magnetic intensity measuring layer, the upper clamping jaw assembly is installed above the workbench through a supporting frame, and the lower supporting and grabbing assembly is arranged on the lower table top. According to the invention, the four-station integrated multi-pole magnetic ring can be automatically magnetized at the same time, after the magnetization is completed, the magnetic flux of the magnetic ring and the surface magnetic intensity of the magnetic ring can be automatically measured through the four layers of charging and measuring stations, and the detection process of the magnetic ring is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of magnetizing machines, and in particular to a four-station Halbach multi-pole magnetic ring charging and testing integrated machine. Background Art

[0002] Halbach magnets are widely used in permanent magnet motors, magnetic levitation, nuclear magnetic resonance, sensors and other fields due to their unique magnetic field distribution characteristics. At present, Halbach magnets are mainly sintered NdFeB spliced ​​arrays and bonded NdFeB integrated magnetic rings. Sintered integrated Halbach magnetic rings are still rare in the market. The preparation of sintered NdFeB magnetic rings requires process links such as pressing, isostatic pressing, sintering, post-processing, magnetization and testing. The existing magnetization equipment basically works in a single station, and the loading, magnetization and unloading of the magnetization process are all done manually; after the magnetization is completed, the magnetic performance parameters such as the magnetic flux and surface magnetic intensity of the magnetic ring need to be measured. The production process is complicated and the efficiency is extremely low. Therefore, the development of a multi-station Halbach multi-pole magnetic ring charging and measuring machine is an urgent problem to improve the production efficiency of sintered NdFeB integrated Halbach magnetic rings. Summary of the invention

[0003] In order to overcome the technical defects of existing magnetizing equipment that requires manual loading and unloading of materials, and the measurement of magnetic performance parameters such as magnetic ring flux and surface magnetic intensity after magnetization, which leads to complex production process and extremely low efficiency, the present invention provides a four-station Halbach multi-pole magnetic ring charging and measuring machine.

[0004] The present invention provides a four-station Halbach multi-pole magnetic ring charging and measuring integrated machine, comprising a loading station, a four-layer charging and measuring station, a unloading station, a workbench, an upper clamping claw assembly and a lower supporting and grasping assembly; The workbench includes an upper table and a lower table arranged in parallel, and a loading station, a four-layer filling and measuring station and an unloading station are arranged on the upper table in sequence; The top surface of the loading station is provided with four limit slots adapted to the pre-magnetic magnetic rings. The loading station is equipped with a vibrating plate loader for placing the pre-magnetic magnetic rings. The discharge port of the vibrating plate loader transfers the pre-magnetic magnetic rings to the four limit slots of the loading station through the guide rails. The four-layer charging and measuring stations include a four-station permanent magnetic guiding and positioning layer, a four-station magnetizing coil layer, a four-station magnetic flux measurement layer and a four-station surface magnetic intensity measurement layer which are arranged in parallel. The four-station permanent magnetic guiding and positioning layer, the four-station magnetizing coil layer, the four-station magnetic flux measurement layer and the four-station surface magnetic intensity measurement layer are all provided with four magnetic ring through holes which penetrate from top to bottom. Four permanent magnets are evenly distributed on the circumference of the four magnetic ring through holes of the four-station permanent magnetic guiding and positioning layer; four magnetizing coils are evenly distributed on the circumference of the four magnetic ring through holes of the four-station magnetizing coil layer; Helmholtz coils are respectively mounted outside the four magnetic ring through holes of the four-station magnetic flux measurement layer; Hall sensor probes are respectively arranged at the four magnetic ring through holes of the four-station surface magnetic intensity measurement layer; The top surface of the unloading station is provided with four limit slots adapted to the pre-charged magnetic rings; The upper clamping jaw assembly is installed above the workbench through a support frame, wherein a two-dimensional mobile platform capable of XY axis movement is provided on the support frame, and the upper clamping jaw assembly is connected to the movable end of the two-dimensional mobile platform, and the upper clamping jaw assembly includes four upper linear electric cylinders and four upper clamping jaws, and the upper clamping jaws are respectively installed to the lower ends of the upper linear electric cylinders, and the four upper clamping jaws respectively correspond to the four magnetic ring through holes of the four-layer filling and measuring stations; The lower supporting and grasping assembly includes four lower rotary electric cylinders, four lower linear electric cylinders and four lower supporting claws. The lower rotary electric cylinder is fixed to the lower table surface. The four lower linear electric cylinders are respectively connected to the four lower rotary electric cylinders. The four lower supporting claws are connected to the tops of the four lower linear electric cylinders. The four lower supporting claws respectively correspond to the positions of the four magnetic ring through holes of the four-layer filling and measuring stations.

[0005] The upper clamping jaw assembly moves along the XY axis driven by the two-dimensional mobile platform, and the upper clamping jaw of the upper clamping jaw assembly can move up and down driven by the upper linear electric cylinder to realize automatic loading and unloading of the pre-magnetized magnetic ring. The lower rotary electric cylinder can drive the lower support jaw to rotate, and the lower linear electric cylinder can drive the lower support jaw to move up and down, so that the pre-magnetized magnetic ring moves up and down or rotates in the magnetic ring through hole. The four-station permanent magnetic guide positioning layer performs basic positioning of the pre-magnetized magnetic ring through the four-pole permanent magnet arranged on it to ensure that the center hole of the pre-magnetized magnetic ring is aligned with the lower support jaw up and down. When the upper clamping jaw places the pre-magnetized magnetic ring from the loading station into the four magnetic ring through holes of the four-station permanent magnetic guide positioning layer, the lower supporting jaw rises and extends into the central through hole of the pre-magnetized magnetic ring. Under the action of the permanent magnet, the pre-magnetized magnetic ring is deflected and positioned, and the lower supporting jaw opens to support the pre-magnetized magnetic ring. The lower linear electric cylinder descends to bring the pre-magnetized magnetic ring to the four magnetic ring through holes of the four-station magnetizing coil layer for magnetization. After magnetization, the lower linear electric cylinder continues to descend to bring the pre-magnetized magnetic ring to the four magnetic ring through holes of the four-station magnetic flux measurement layer to complete the magnetic flux measurement in the Helmholtz coil; the lower linear electric cylinder continues to descend to bring the pre-magnetized magnetic ring to the four magnetic ring through holes of the four-station surface magnetic measurement layer, and the lower rotating electric cylinder drives the pre-magnetized magnetic ring to rotate to complete the surface field waveform measurement. After the magnetization and testing are completed, the lower linear electric cylinder moves upward to push the four magnetic rings out to the top of the four-station permanent magnetic guide positioning layer. The magnetic rings are grabbed by the upper clamp, and the two-dimensional mobile platform drives the upper clamp assembly to move, moving the magnetic rings to the four limit slots of the unloading station.

[0006] Preferably, in the four-station permanent magnet guiding positioning layer, the two adjacent polarities of the four permanent magnets outside each magnetic ring through hole are opposite, and the two opposite polarities are the same. For example, the ends of the two opposite permanent magnets are both N poles or S poles, and the ends of the two adjacent permanent magnets are respectively N poles and S poles. This arrangement is very reasonable and can play a deflection positioning role on the pre-magnetized magnetic ring.

[0007] Compared with the prior art, the technical solution provided by the present invention has the following technical effects: the magnetizing device described in the present invention can generate a standard sine wave to realize high-precision magnetization of an integrated sintered NdFeB Halbach multi-pole magnetic ring; the integrated charging and measuring machine described in the present invention can realize simultaneous automatic magnetization of a four-station integrated multi-pole magnetic ring, significantly improving production efficiency and reducing production costs; after the magnetization is completed, the magnetic flux of the magnetic ring and the surface magnetic strength of the magnetic ring can be automatically measured immediately through the four-layer charging and measuring stations described in the present invention, thereby simplifying the magnetic ring detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0009] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0010] Figure 1 It is a structural schematic diagram of a four-station Halbach multi-pole magnetic ring charging and testing integrated machine described in a certain embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a four-station permanent magnetic guide positioning layer in an embodiment of the present invention; Figure 3 This is a schematic structural diagram of a four-station magnetizing coil layer in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a four-station magnetic flux measurement layer in an embodiment of the present invention; Figure 5 It is a structural schematic diagram of the magnetic intensity measurement layer of the four-station table described in an embodiment of the present invention; Figure 6 It is a structural schematic diagram of the upper clamping jaw assembly described in a certain embodiment of the present invention; Figure 7 It is a schematic structural diagram of the lower supporting and grasping assembly described in a certain embodiment of the present invention.

[0011] In the figure: 1. upper table; 2. lower table; 3. support frame; 4. two-dimensional mobile platform; 5. upper linear electric cylinder; 6. upper clamping jaw; 7. loading station; 8. four-layer charging and measuring station; 9. unloading station; 10. lower rotary electric cylinder; 11. lower linear electric cylinder; 12. lower supporting jaw; 13. vibration plate loader; 14. four-station permanent magnetic guiding and positioning layer; 15. four-station magnetizing coil layer; 16. four-station magnetic flux measurement layer; 17. four-station magnetic intensity measurement layer; 18. magnetic ring through hole; 19. permanent magnet; 20. magnetizing coil; 21. Helmholtz coil; 22. Hall sensor probe; 23. limit slot. DETAILED DESCRIPTION

[0012] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0013] In the description, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0014] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0015] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0016] In one embodiment, Figure 1 As shown, a four-station Halbach multi-pole magnetic ring charging and measuring integrated machine includes a loading station 7, a four-layer charging and measuring station 8, a unloading station 9, a workbench, an upper clamping claw assembly and a lower supporting and grasping assembly; The workbench includes an upper table 1 and a lower table 2 arranged in parallel, and a loading station 7, a four-layer filling and measuring station 8 and a unloading station 9 are arranged on the upper table 1 in sequence; The top surface of the feeding station 7 is provided with four limit slots 23 adapted to the pre-magnetized magnetic rings. The feeding station 7 is equipped with a vibrating plate feeder 13 for placing the pre-magnetized magnetic rings. The discharge port of the vibrating plate feeder 13 transfers the pre-magnetized magnetic rings to the four limit slots 23 of the feeding station 7 through four guide rails. The four-layer charging and measuring station 8 includes a four-station permanent magnetic guide positioning layer 14, a four-station magnetizing coil layer 15, a four-station magnetic flux measurement layer 16 and a four-station surface magnetic intensity measurement layer 17 which are arranged in parallel. The four-station permanent magnetic guide positioning layer 14, the four-station magnetizing coil layer 15, the four-station magnetic flux measurement layer 16 and the four-station surface magnetic intensity measurement layer 17 are all provided with four magnetic ring through holes 18 which pass through from top to bottom. Four permanent magnets 19 are evenly distributed on the circumference of the four magnetic ring through holes 18 of the four-station permanent magnetic guide positioning layer 14; four magnetizing coils 20 are evenly distributed on the circumference of the four magnetic ring through holes 18 of the four-station magnetizing coil layer 15; Helmholtz coils 21 are respectively mounted outside the four magnetic ring through holes 18 of the four-station magnetic flux measurement layer 16; Hall sensor probes 22 are respectively arranged at the four magnetic ring through holes 18 of the four-station surface magnetic intensity measurement layer 17; The top surface of the unloading station 9 is provided with four limit slots 23 adapted to the pre-magnetized magnetic rings; The upper clamping jaw assembly is installed above the workbench through a support frame 3, wherein a two-dimensional mobile platform 4 capable of XY axis movement is provided on the support frame 3, and the upper clamping jaw assembly is connected to the movable end of the two-dimensional mobile platform 4, and the upper clamping jaw assembly includes four upper linear electric cylinders 5 and four upper clamping jaws 6, and the upper clamping jaws 6 are respectively installed to the lower ends of the upper linear electric cylinders 5, and the four upper clamping jaws 6 respectively correspond to the four magnetic ring through holes 18 of the four-layer filling and measuring stations 8; The lower supporting and grasping assembly includes four lower rotating electric cylinders 10, four lower linear electric cylinders 11 and four lower supporting claws 12. The lower rotating electric cylinder 10 is fixed to the lower table 2. The four lower linear electric cylinders 11 are respectively connected to the four lower rotating electric cylinders 10. The four lower supporting claws 12 are connected to the tops of the four lower linear electric cylinders 11. The four lower supporting claws 12 respectively correspond to the positions of the four magnetic ring through holes 18 of the four-layer filling and measuring stations 8.

[0017] The upper clamping jaw assembly moves along the XY axis driven by the two-dimensional mobile platform 4, and the upper clamping jaw 6 of the upper clamping jaw assembly can move up and down driven by the upper linear electric cylinder 5 to realize automatic loading and unloading of the pre-magnetized magnetic ring. The lower rotary electric cylinder 10 can drive the lower support claw 12 to rotate, and the lower linear electric cylinder 11 can drive the lower support claw 12 to move up and down, so that the pre-magnetized magnetic ring moves up and down or rotates in the magnetic ring through hole 18. The four-station permanent magnetic guide positioning layer 14 performs basic positioning on the pre-magnetized magnetic ring through the quadrupole permanent magnet 19 arranged thereon to ensure that the center hole of the pre-magnetized magnetic ring is aligned with the lower support claw 12 up and down. When the upper clamping jaw 6 places the pre-magnetized magnetic ring from the loading station 7 into the four magnetic ring through holes 18 of the four-station permanent magnetic guide positioning layer 14, the lower supporting jaw 12 rises and extends into the central through hole of the pre-magnetized magnetic ring. Under the action of the permanent magnet 19, the pre-magnetized magnetic ring is deflected and positioned, and the lower supporting jaw 12 opens to support the pre-magnetized magnetic ring. The lower linear electric cylinder 11 descends to bring the pre-magnetized magnetic ring to the four magnetic ring through holes 18 of the four-station magnetizing coil layer 15 for magnetization. After magnetization, the lower linear electric cylinder 11 continues to descend to bring the pre-magnetized magnetic ring to the four magnetic ring through holes 18 of the four-station magnetic flux measurement layer 16 to complete the magnetic flux measurement in the Helmholtz coil 21; the lower linear electric cylinder 11 continues to descend to bring the pre-magnetized magnetic ring to the four magnetic ring through holes 18 of the four-station surface magnetic measurement layer, and the lower rotary electric cylinder 10 drives the pre-magnetized magnetic ring to rotate to complete the surface field waveform measurement. After the magnetization and testing are completed, the lower linear electric cylinder 11 moves upward, and pushes the four magnetic rings to the top of the four-station permanent magnetic guide positioning layer 14, and grabs the magnetic rings through the upper clamping jaws 6. The two-dimensional mobile platform 4 drives the upper clamping jaw assembly to move, and moves the magnetic rings to the four limit slots 23 of the unloading station 9. The magnetic rings are pre-magnetized before the formal magnetization, so the pre-magnetized magnetic rings can achieve deflection positioning in the four-station permanent magnetic guide positioning layer 14. In the four-layer charging and testing station 8, except for the four-station permanent magnetic guide positioning layer 14, the other four-station magnetization coil layer 15, the four-station magnetic flux measurement layer 16 and the four-station surface magnetic intensity measurement layer 17 all lead out the connected wires to complete the magnetization, magnetic flux measurement and surface magnetic intensity measurement.

[0018] On the basis of the above embodiments, in a preferred embodiment, in the four-station permanent magnet guiding and positioning layer 14, the two adjacent polarities of the four permanent magnets 19 outside each magnetic ring through hole 18 are opposite, and the two opposite polarities are the same. For example, the ends of the two opposite permanent magnets 19 are both N poles or S poles, and the ends of the two adjacent permanent magnets 19 are N poles and S poles respectively. This setting is very reasonable and can play a deflection and positioning role on the pre-magnetized magnetic ring.

[0019] The steps of magnetizing a magnetic ring using the four-station Halbach multi-pole magnetic ring charging and testing integrated machine described in the present invention are as follows: Step 1, initial loading: multiple pre-magnetized magnetic rings are installed in the vibration plate loader 13, and the vibration plate loader 13 vibrates to transfer the pre-magnetized magnetic rings along the guide rail to the four limit slots 23 of the loading station 7; the two-dimensional mobile platform 4 drives the upper linear electric cylinder 5 and the upper clamping jaw 6 to move to the loading station 7, the upper linear electric cylinder 5 moves down, and the upper clamping jaw 6 grabs the pre-magnetized magnetic ring to be magnetized, and the upper linear electric cylinder 5 moves up. The two-dimensional mobile platform 4 drives the upper linear electric cylinder 5 and the upper clamping jaw 6 to move to the four-layer charging and measuring station 8, and the upper linear electric cylinder 5 moves down, and the pre-magnetized magnetic ring is loaded into the four magnetic ring through holes 18 of the four-station permanent magnetic guide positioning layer 14 by using the upper clamping jaw 6; Step 2, positioning, magnetization, magnetic flux measurement and surface magnetism measurement: the lower support claw 12 rises and extends into the central through hole of the pre-magnetized magnetic ring. Under the action of the permanent magnet 19, the pre-magnetized magnetic ring is deflected and positioned. The lower support claw 12 opens to support the pre-magnetized magnetic ring. The lower linear electric cylinder 11 moves downward to bring the pre-magnetized magnetic ring to the four magnetic ring through holes 18 of the four-station magnetization coil layer 15 for magnetization. After magnetization, the lower linear electric cylinder 11 continues to move downward to bring the pre-magnetized magnetic ring to the four magnetic ring through holes 18 of the four-station magnetic flux measurement layer 16 to complete the magnetic flux measurement in the Helmholtz coil 21; the lower linear electric cylinder 11 continues to move downward to bring the pre-magnetized magnetic ring to the four magnetic ring through holes 18 of the four-station surface magnetism measurement layer, and the lower rotary electric cylinder 10 drives the pre-magnetized magnetic ring to rotate to complete the surface field waveform measurement; Step 3, unloading: After the magnetization and testing are completed, the lower linear electric cylinder 11 moves upward to push the four magnetic rings to the top of the four-station permanent magnetic guide positioning layer 14, and the magnetic rings are grabbed by the upper clamping jaws 6. The two-dimensional mobile platform 4 drives the upper clamping jaw assembly to move, and the magnetic rings are moved to the four limit slots 23 of the unloading station 9, and the upper clamping jaws 6 are released; Step 4: After unloading is completed, the upper linear electric cylinder 5 moves upward, and the two-dimensional mobile platform 4 drives the upper linear electric cylinder 5 and the upper clamp 6 to move to the loading station 7, and repeats the above steps 1 to 3 to perform the next round of charging and measuring operations.

[0020] The above is only a specific implementation of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A four-station Halbach multi-pole magnetic ring charging and testing machine, characterized in that: It includes a loading station (7), a four-layer filling and measuring station (8), a unloading station (9), a workbench, an upper clamping jaw assembly and a lower supporting and grasping assembly; The workbench comprises an upper table (1) and a lower table (2) arranged in parallel, and a loading station (7), a four-layer filling and measuring station (8) and a unloading station (9) are arranged on the upper table (1) in sequence; The top surface of the loading station (7) is provided with four limit slots (23) adapted to the pre-magnetized magnetic rings. The loading station (7) is equipped with a vibration plate loading machine (13) for placing the pre-magnetized magnetic rings. The discharge port of the vibration plate loading machine (13) transfers the pre-magnetized magnetic rings to the four limit slots (23) of the loading station (7) via guide rails. The four-layer charging and measuring stations (8) include a four-station permanent magnetic guide positioning layer (14), a four-station magnetizing coil layer (15), a four-station magnetic flux measurement layer (16) and a four-station surface magnetic intensity measurement layer (17) arranged in parallel. The four-station permanent magnetic guide positioning layer (14), the four-station magnetizing coil layer (15), the four-station magnetic flux measurement layer (16) and the four-station surface magnetic intensity measurement layer (17) are all provided with four magnetic ring through holes (18) extending vertically. The four-station permanent magnetic guide positioning layer (1 4) are respectively evenly distributed on the circumference of the four magnetic ring through holes (18); four magnetizing coils (20) are respectively evenly distributed on the circumference of the four magnetic ring through holes (18) of the four-station magnetizing coil layer (15); Helmholtz coils (21) are respectively mounted outside the four magnetic ring through holes (18) of the four-station magnetic flux measurement layer (16); and Hall sensor probes (22) are respectively arranged at the four magnetic ring through holes (18) of the four-station magnetic intensity measurement layer (17); The top surface of the unloading station (9) is provided with four limit slots (23) adapted to the pre-magnetized magnetic rings; The upper clamping jaw assembly is installed above the workbench through a support frame (3), wherein a two-dimensional movable platform (4) capable of XY axis movement is arranged on the support frame (3), the upper clamping jaw assembly is connected to the movable end of the two-dimensional movable platform (4), and the upper clamping jaw assembly comprises four upper linear electric cylinders (5) and four upper clamping jaws (6), the upper clamping jaws (6) are respectively installed on the lower ends of the upper linear electric cylinders (5), and the four upper clamping jaws (6) respectively correspond to the four magnetic ring through holes (18) of the four-layer filling and measuring stations (8); The lower supporting and grasping assembly comprises four lower rotating electric cylinders (10), four lower linear electric cylinders (11) and four lower supporting claws (12); the lower rotating electric cylinder (10) is fixed to the lower table (2); the four lower linear electric cylinders (11) are respectively connected to the four lower rotating electric cylinders (10); the four lower supporting claws (12) are connected to the tops of the four lower linear electric cylinders (11); the four lower supporting claws (12) respectively correspond to the positions of the four magnetic ring through holes (18) of the four-layer filling and measuring stations (8).

2. The four-station Halbach multi-pole magnetic ring filling and testing integrated machine according to claim 1, characterized in that: In the four-station permanent magnetic guiding positioning layer (14), two adjacent ones of the four permanent magnets (19) outside each magnetic ring through hole (18) have opposite polarities, and two opposite ones have the same polarities.

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