Efficient and low-cost equivalent spiral permanent magnet machining method for magnetic transmission device

Abstract

The invention provides a high-efficiency low-cost equivalent spiral permanent magnet processing method for a magnetic transmission device, which comprises the following steps of: firstly, determining parameters such as the inner diameter, the outer diameter, the screw pitch, the polar distance, the thickness and the number of turns of a spiral permanent magnet, and then determining the number of sections of the spiral permanent magnet under the screw pitch and the central angle of each section of the spiral permanent magnet; and parameters such as the central angle, the polar distance and the thickness of the corresponding arc-shaped permanent magnet are determined. The working platform is adopted to fix the arc-shaped permanent magnet, and the arc-shaped permanent magnet is synchronously and obliquely cut according to a specific angle and direction to obtain a plurality of sections of spiral permanent magnets with equivalent magnetic performance, so that a traditional single spiral permanent magnet machining method is replaced, and material waste and machining cost are reduced. In addition, due to the design of the working platform, a plurality of permanent magnets can be fixed and machined in one-time operation, and the quality consistency and high efficiency in the machining process are ensured. The method is not only suitable for small-scale production, but also capable of remarkably improving the efficiency of large-scale production.

Description

Technical Field

[0001] The invention relates to the field of design and manufacture of magnetic transmission devices, and in particular to a high-efficiency and low-cost equivalent spiral permanent magnet processing method for magnetic transmission devices. Background Art

[0002] Magnetic transmission devices are widely used in motors, generators and other equipment due to their advantages such as contactless power transmission, high thrust density and high reliability. Among them, magnetic screws, as a typical magnetic transmission device, can achieve mutual conversion between linear motion and rotational motion without physical contact, effectively avoiding friction and wear, significantly extending the service life of the equipment, and reducing the need for lubrication and maintenance. In addition, magnetic transmission devices have excellent performance in vibration resistance, impact resistance, energy transfer efficiency and low-noise operation, and therefore show broad application prospects in wave power generation, artificial hearts, rail transportation and other fields.

[0003] However, the traditional processing method of a single spiral permanent magnet has great limitations in terms of material utilization and cutting efficiency, and is prone to dimensional errors, which in turn affects the overall performance of the magnetic transmission device. This processing method is difficult to meet the needs of large-scale, low-cost production. Therefore, it is an urgent need for the industry to develop an innovative method that can improve production efficiency, reduce costs, and ensure the accuracy and consistency of spiral permanent magnets. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to solve the difficulties existing in the processing of spiral permanent magnets, especially the problems of low material utilization and low cutting efficiency of traditional single-piece spiral permanent magnets. To this end, the present invention proposes a high-efficiency and low-cost equivalent spiral permanent magnet processing method for magnetic transmission devices. This method significantly improves the processing efficiency and accuracy, reduces production costs, and ensures the dimensional consistency and performance stability of spiral permanent magnets by simultaneously performing high-precision oblique cutting on multiple permanent magnets.

[0005] The method comprises the following steps:

[0006] Step 1, determining various parameters required for permanent magnet processing;

[0007] Step 2, establishing a working platform and adjusting the working platform to adapt to the arc-shaped permanent magnet;

[0008] Step 3, using the working platform and an equivalent spiral permanent magnet processing method to achieve high-precision synchronous oblique cutting of the arc-shaped permanent magnet to obtain spiral permanent magnets with different magnetization directions, and finally obtain multiple spiral permanent magnet blocks and remaining permanent magnets;

[0009] Step 4: To ensure close contact and excellent magnetic force transmission performance between the various segments of the spiral permanent magnet during the assembly process, the cut multiple spiral permanent magnets are subjected to fine surface treatment in blocks and then assembled.

[0010] Step 1 includes:

[0011] Step 1-1, determine the inner diameter of the helical permanent magnet , outer diameter , pitch , pole distance ,thickness and the number of turns r;

[0012] Step 1-2, determine the pitch The number of segments n of the spiral permanent magnet under the segment number n and the central angle of each segment of the spiral permanent magnet under the segment number n ;

[0013] Step 1-3, determine the center angle of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet under the segment number n , pole distance ,thickness , the width of the remaining permanent magnet .

[0014] In step 1-1, the inner diameter of the spiral permanent magnet , outer diameter and thickness satisfy: ; Pitch and pole distance satisfy: ;

[0015] In step 1-2, the number of segments The central angle of each spiral permanent magnet satisfy: ;

[0016] In steps 1-3, the number of segments The central angle of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet With the number of segments The central angle of each spiral permanent magnet The same size, that is ; The number of segments The pole distance of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet satisfy: , ,Right now ; The number of segments The thickness of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet Thickness of helical permanent magnet The same size, that is .

[0017] In step 2, the working platform includes a left clamp, a right clamp, a metal base, a left slide, a right slide, bolts and limit holes;

[0018] The axial length of the working platform is set to one meter. This design enables the working platform to flexibly adapt to the processing requirements of arc-shaped permanent magnets of different sizes.

[0019] The left clamp and the right clamp are designed with an open hole structure, the number of the holes is not limited, and the specific positions of the holes are adjusted according to actual processing requirements to adapt to different working conditions and permanent magnet sizes; the left clamp and the right clamp are respectively installed at one-third of the end position of the left slide and one-third of the end position of the right slide;

[0020] The left clamp and the right clamp are respectively connected to the left slide and the right slide by welding technology to ensure accurate positioning during the processing;

[0021] The left clamp and the right clamp are used to directly contact the arc-shaped permanent magnet to be processed and are fixed by bolts and limit holes to ensure that the arc-shaped permanent magnet is stable during the cutting process to avoid displacement or rotation;

[0022] The left slide and the right slide are mounted on a metal base and can slide precisely along the axial direction to ensure the accuracy requirements of the processing process;

[0023] The metal base has high strength and stability, is used to support the entire processing device, and provides a solid reference surface during the processing.

[0024] The left slide and the right slide are both designed to be rectangular, which not only simplifies the manufacturing process but also provides a larger contact area;

[0025] The left slide and the right slide are both equipped with bolts and limit holes for adjusting the clamping force or realizing the rapid replacement of the workpiece.

[0026] In step 2, the left slide and the right slide are adjusted to accommodate the arc-shaped permanent magnet, ensuring that the left fixture and the right fixture can firmly position the arc-shaped permanent magnet.

[0027] In step 3, the equivalent spiral permanent magnet processing method includes: The first cutting starting point is is the cutting angle, the arc-shaped permanent magnet is cut for the first time, and the arc-shaped permanent magnet is cut from the starting point of the first cutting along the lower left to the bottom of the left wall of the arc-shaped permanent magnet to separate the remaining permanent magnet on the left from the arc-shaped permanent magnet;

[0028] Next, at a cutting angle of Under the condition of The position is taken as the starting point of the second cutting, and the distance from the second cutting starting point along the lower left to the bottom of the left wall of the arc-shaped permanent magnet is At, thereby obtaining the first spiral permanent magnet;

[0029] Still cutting at an angle of Under the condition of The position is taken as the starting point of the third cutting, and the distance from the third cutting starting point along the lower left to the bottom of the left wall of the arc-shaped permanent magnet is Thus, the second spiral permanent magnet is obtained; and so on, cutting is performed in sequence to obtain multiple spiral permanent magnet blocks;

[0030] The last cut starts from the top of the right wall of the arc-shaped permanent magnet, and the cutting angle is still maintained at , cut from the top of the right wall of the arc-shaped permanent magnet along the lower left to the distance from the bottom of the right wall of the arc-shaped permanent magnet At the same time, the remaining permanent magnets on the right are separated from the multiple spiral permanent magnets in blocks;

[0031] Through the equivalent spiral permanent magnet processing method, each cutting operation is equivalent to processing an independent spiral permanent magnet block, thereby improving the utilization rate of permanent magnet materials and reducing the loss of permanent magnet edge waste during the cutting process;

[0032] In step 3, the cutting angle satisfy: ,

[0033] because , , ,get:

[0034] .

[0035] In step 3, the equivalent spiral permanent magnet processing method can cut the circular arc permanent magnet magnetized radially outward into the spiral permanent magnet magnetized radially outward, and cut the circular arc permanent magnet magnetized radially inward into the spiral permanent magnet magnetized radially inward; through the equivalent spiral permanent magnet processing method, more than two sections of spiral permanent magnets can be accurately processed in a single operation, and only two residual permanent magnets, the left residual permanent magnet and the right residual permanent magnet, are produced, thereby significantly improving the processing efficiency and yield rate.

[0036] In step 4, the surface fine treatment includes: using a grinding device to carefully polish the edge of the magnet to ensure that the surface is smooth and free of cracks to ensure assembly accuracy and magnetic field uniformity;

[0037] During assembly, align the starting end of the second spiral permanent magnet with the end of the first spiral permanent magnet, align the starting end of the third spiral permanent magnet with the end of the second spiral permanent magnet, and so on, align in sequence until the starting end of the last spiral permanent magnet is aligned with the end of the penultimate spiral permanent magnet, ensuring that the spiral angle and magnetization direction of each segment are precisely consistent. According to the structural design of the magnetic transmission device, each segment of the spiral permanent magnet is firmly bonded by a special non-magnetic adhesive;

[0038] In order to ensure the production of permanent magnets with two magnetization directions and optimize the performance of equivalent spiral permanent magnets, the spiral permanent magnet is cut and spliced ​​from at least two arc-shaped permanent magnets, and each arc-shaped permanent magnet is precisely cut into at least two spiral sections. This equivalent spiral permanent magnet cut and spliced ​​from multiple arc-shaped permanent magnets not only meets the requirements of different magnetization directions, but also achieves more efficient and reliable magnetic properties.

[0039] The equivalent spiral permanent magnet can be applied to electric motors, generators and other magnetic transmission devices to achieve efficient magnetic transmission.

[0040] Beneficial effects: The synchronous bevel cutting technology in the present invention greatly improves material utilization and processing accuracy, simplifies the process flow, and reduces time and production costs. This technology effectively avoids the dimensional error problem common in traditional single-piece processing. Due to its design flexibility and high efficiency, the device is suitable for a variety of spiral permanent magnet processing scenarios, providing reliable technical support for the efficient production of magnetic transmission systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the above and / or other advantages of the present invention will become more clear.

[0042] Figure 1 It is a schematic diagram of the process of the present invention;

[0043] Figure 2 It is a schematic diagram of the structure of a complete spiral permanent magnet;

[0044] Figure 3 is a side view of a helical permanent magnet;

[0045] Figure 4 It is a segmented schematic diagram of a helical permanent magnet under a certain pitch;

[0046] Figure 5 It is a schematic diagram of the structure of a complete arc-shaped permanent magnet;

[0047] Figure 6 is a schematic diagram of a working platform for cutting a spiral permanent magnet according to the present invention;

[0048] Figure 7 It is a schematic structural diagram of a circular arc-shaped permanent magnet after being cut by the processing method of the present invention;

[0049] Figure 8 is a two-dimensional schematic diagram of a circular arc-shaped permanent magnet after cutting using the processing method of the present invention;

[0050] Fig. 9 It is a schematic diagram of the structure of an arc-shaped permanent magnet after cutting using a traditional processing method;

[0051] Fig.10 It is a two-dimensional schematic diagram of a circular arc-shaped permanent magnet after cutting using the traditional processing method;

[0052] Fig.11 It is a schematic diagram of cutting multiple arc-shaped permanent magnets using traditional processing methods;

[0053] Fig.12 It is a schematic diagram of splicing multiple spiral permanent magnets into an equivalent spiral permanent magnet;

[0054] Fig.13 This is a comparison chart of the thrust output of a magnetic screw using a spiral permanent magnet and an equivalent spiral permanent magnet;

[0055] In the figure: 6-1 represents the left clamp; 6-2 represents the right clamp; 6-3 represents the metal base; 6-4 represents the left slide; 6-5 represents the right slide; 6-6 represents the bolt; 6-7 represents the limit hole; 7-1 represents the multi-piece spiral permanent magnet block; 7-2 represents the left remaining permanent magnet; 7-3 represents the right remaining permanent magnet; 8-1 represents the two-dimensional multi-piece spiral permanent magnet block; 8-2 represents the two-dimensional left remaining permanent magnet; 8-3 represents the two-dimensional right remaining permanent magnet; 9-1 represents the single-piece spiral permanent magnet block; 9-2 represents the left remaining permanent magnet; 9-3 represents the right remaining permanent magnet; 10-1 represents the two-dimensional single-piece spiral permanent magnet block; 10-2 represents the two-dimensional left remaining permanent magnet; 10-3 represents the two-dimensional right remaining permanent magnet; 11-1 represents the saved permanent magnet material; 12-1 represents the radially outward magnetized spiral permanent magnet; 12-2 represents the radially inward magnetized spiral permanent magnet. DETAILED DESCRIPTION

[0056] like Figure 1 As shown, this embodiment provides a high-efficiency and low-cost equivalent spiral permanent magnet processing method for a magnetic transmission device, which specifically includes the following steps:

[0057] Step 1: Determine the inner diameter of the helical permanent magnet , outer diameter , pitch , pole distance ,thickness and number of laps ;

[0058] Step 2: Determine the pitch The number of helical permanent magnet segments under And the number of segments The central angle of each spiral permanent magnet ;

[0059] Step 3: Determine the number of segments The central angle of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet , pole distance ,thickness , the width of the remaining permanent magnet ;

[0060] Step 4, adjust the left slide and the right slide to adapt to the arc-shaped permanent magnet, and ensure that the left fixture and the right fixture can firmly position the arc-shaped permanent magnet;

[0061] Step 5: The distance from the top of the left wall of the arc-shaped permanent magnet is Starting from The arc-shaped permanent magnet is cut for the first time from the starting point along the lower left to the bottom of the left wall of the arc-shaped permanent magnet to separate the remaining permanent magnet on the left from the arc-shaped permanent magnet.

[0062] Next, at a cutting angle of Under the condition of the first cutting starting point Starting from this point, cut along the lower left to the bottom of the left wall of the arc-shaped permanent magnet Thus, the first spiral permanent magnet is obtained.

[0063] Similarly, still at the cutting angle of Under the condition of the second cutting starting point Starting from this point, cut along the lower left to the bottom of the left wall of the arc-shaped permanent magnet Thus, the second spiral permanent magnet is obtained. And so on, the cutting is carried out in sequence to obtain multiple spiral permanent magnet blocks.

[0064] The last cut starts from the top of the right wall of the arc-shaped permanent magnet, and the cutting angle is still maintained at , cut from this point along the lower left to the bottom of the right wall of the arc-shaped permanent magnet At the same time, the remaining permanent magnets on the right are separated from the multiple spiral permanent magnets.

[0065] Through this spiral permanent magnet cutting technology, each cutting operation is equivalent to processing an independent spiral permanent magnet block, thereby improving the utilization rate of permanent magnet materials and reducing the loss of permanent magnet edge waste during the cutting process;

[0066] Step 6: To ensure close contact and excellent magnetic force transmission performance between the various segments of the spiral permanent magnet during assembly, the cut pieces of the spiral permanent magnets need to be finely processed on the surface. Use grinding equipment to carefully polish the edges of the magnets to ensure a smooth surface without cracks to ensure assembly accuracy and magnetic field uniformity.

[0067] During assembly, align the starting end of the second spiral permanent magnet with the end of the first spiral permanent magnet, align the starting end of the third spiral permanent magnet with the end of the second spiral permanent magnet, and so on, until the starting end of the last spiral permanent magnet is aligned with the end of the penultimate spiral permanent magnet, ensuring that the spiral angle and magnetization direction of each segment are precisely consistent. According to the structural design of the magnetic transmission device, each segment of the spiral permanent magnet is firmly bonded by a special non-magnetic adhesive.

[0068] like Figure 2 As shown, the pitch of the spiral permanent magnet and pole distance satisfy: .

[0069] like Figure 3 As shown, the inner diameter of the spiral permanent magnet , outer diameter and thickness satisfy: .

[0070] like Figure 4 As shown, the number of segments The central angle of each spiral permanent magnet satisfy: .

[0071] like Figure 5 As shown, the number of segments The central angle of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet With the number of segments The central angle of each spiral permanent magnet The same size, that is ; The number of segments The pole distance of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet satisfy: , ,Right now ; The number of segments The thickness of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet Thickness of helical permanent magnet The same size, that is .

[0072] like Figure 6 As shown, the working platform includes a left clamp 6-1, a right clamp 6-2, a metal base 6-3, a left slide 6-4, a right slide 6-5, bolts 6-6 and limit holes 6-7. The left clamp 6-1 and the right clamp 6-2 are used to fix the permanent magnet during the processing to ensure that it remains stable during the cutting process to avoid displacement or rotation. The left slide 6-4 and the right slide 6-5 are installed on the metal base 6-3 and can slide accurately along the axial direction to ensure the accuracy requirements of the processing process. The slide design is equipped with bolts 6-6 and limit holes 6-7, which are convenient for adjusting the clamping force or realizing the rapid replacement of workpieces.

[0073] In addition, the axial length of the working platform is set to one meter. This design enables the working platform to flexibly adapt to the processing requirements of arc-shaped permanent magnets of different sizes.

[0074] The left-side clamp 6-1 and the right-side clamp 6-2 adopt an open-hole structure design, the number of holes is not limited, and the specific positions of the holes are adjusted according to actual processing requirements to adapt to different working conditions and permanent magnet sizes; the left-side clamp 6-1 and the right-side clamp 6-2 are respectively installed at one-third of the end position of the left slide 6-4 and the right slide 6-5; the two side clamps are connected to the two side slides by welding technology to ensure precise positioning during the processing process; the two side clamps are designed to directly contact the arc-shaped permanent magnet to be processed, and are fixed by bolts 6-6 and limit holes 6-7 to ensure the stability of the arc-shaped permanent magnet during the cutting process to avoid displacement or rotation.

[0075] The metal base 6 - 3 has high strength and stability, is used to support the entire processing device, and provides a solid reference surface during the processing.

[0076] The left slide 6-4 and the right slide 6-5 are both designed to be rectangular, which not only simplifies the manufacturing process but also provides a larger contact area; the left slide 6-4 and the right slide 6-5 are installed on the metal base 6-3 and can slide accurately along the axial direction to ensure the accuracy requirements of the processing process; the slides on both sides are equipped with bolts 6-6 and limit holes 6-7 for adjusting the clamping force or realizing the rapid replacement of the workpiece.

[0077] like Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the cutting angle satisfy: , , , ,Right now ;

[0078] The high-efficiency and low-cost equivalent spiral permanent magnet processing method for the magnetic transmission device can effectively separate the multi-piece spiral permanent magnet block 7-1 from the corresponding left-side residual permanent magnet 7-2 and right-side residual permanent magnet 7-3; specifically, the high-efficiency and low-cost equivalent spiral permanent magnet processing method can accurately separate the two-dimensional multi-piece spiral permanent magnet block 8-1 from the two-dimensional left-side residual permanent magnet 8-2 and the two-dimensional right-side residual permanent magnet 8-3;

[0079] Conventional equivalent spiral permanent magnet processing methods generally involve separation of a single spiral permanent magnet block 9-1 and its left residual permanent magnet 9-2 and right residual permanent magnet 9-3; similarly, conventional equivalent spiral permanent magnet processing methods also involve separation of a two-dimensional single spiral permanent magnet block 10-1 and its corresponding two-dimensional left residual permanent magnet 10-2 and two-dimensional right residual permanent magnet 10-3;

[0080] Compared with the traditional equivalent spiral permanent magnet processing method, the high-efficiency and low-cost equivalent spiral permanent magnet processing method proposed in the present invention has achieved significant improvement in efficiency and effectively accelerated the processing speed.

[0081] like Fig.11 As shown, as the number of segments of the spiral permanent magnet increases, the processing method proposed by the present invention can significantly reduce the consumption of permanent magnet materials, thereby significantly increasing the saved permanent magnet materials 11-1. This not only improves the utilization rate of permanent magnet materials, but also reduces production costs, providing an economical and efficient solution for the manufacture of spiral permanent magnets.

[0082] like Fig.12 As shown, the equivalent spiral permanent magnet processing method covers the assembly process of the spiral permanent magnet, and can flexibly select a specific splicing method and angle according to actual working conditions and technical requirements, and tightly assemble the radially outer magnetized spiral permanent magnet 12-1 and the radially inner magnetized spiral permanent magnet 12-2 to ensure the best structural performance and functional adaptation. This method provides a high degree of adjustability and customization for the precise assembly of spiral permanent magnets, further improving the flexibility and overall efficiency of processing.

[0083] like Fig.13 As shown in the figure, the output thrust of the magnetic screw using the helical permanent magnet and its equivalent segmented assembly was calculated and analyzed. The results show that the magnetic screws of the two design schemes show extremely high consistency in output thrust. This finding further verifies that the scheme of assembling the helical permanent magnet in segments is not only feasible in theory, but also feasible in practical applications, providing an efficient and flexible alternative method for the design and manufacture of magnetic screws.

[0084] The present invention provides an efficient and low-cost equivalent spiral permanent magnet processing method for a magnetic transmission device. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A high-efficiency and low-cost equivalent spiral permanent magnet processing method for a magnetic transmission device, characterized in that: The following steps are involved: Step 1, determine the parameters required for permanent magnet processing; Step 2, establishing a working platform and adjusting the working platform to adapt to the arc-shaped permanent magnet; Step 3, using the working platform and an equivalent spiral permanent magnet processing method to achieve high-precision synchronous oblique cutting of the arc-shaped permanent magnet to obtain spiral permanent magnets with different magnetization directions, and finally obtain multiple spiral permanent magnet blocks (7-1) and remaining permanent magnets; Step 4, performing fine surface treatment on the cut multiple spiral permanent magnet blocks (7-1), and then assembling them.

2. The method according to claim 1, characterized in that Step 1 includes: Step 1-1, determine the inner diameter of the helical permanent magnet , outer diameter , pitch , pole distance ,thickness and number of laps ; Step 1-2, determine the pitch The number of helical permanent magnet segments under And the number of segments The central angle of each spiral permanent magnet ; Step 1-3, determine the number of segments The central angle of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet , pole distance ,thickness , the width of the remaining permanent magnet .

3. The method according to claim 2, characterized in that In step 1-1, the inner diameter of the spiral permanent magnet , outer diameter and thickness satisfy: ; Pitch and pole distance satisfy: ; In step 1-2, the number of segments The central angle of each spiral permanent magnet satisfy: ; In steps 1-3, the number of segments The central angle of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet With the number of segments The central angle of each spiral permanent magnet The same size, that is ; The number of segments The pole distance of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet satisfy: , ,Right now ; The number of segments The thickness of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet Thickness of helical permanent magnet The same size, that is .

4. The method according to claim 3, characterized in that In step 2, the working platform includes a left clamp (6-1), a right clamp (6-2), a metal base (6-3), a left slide (6-4), a right slide (6-5), bolts (6-6) and limit holes (6-7); The left clamp (6-1) and the right clamp (6-2) are designed with an open hole structure; the left clamp (6-1) and the right clamp (6-2) are respectively installed at one third of the end position of the left slide (6-4) and one third of the end position of the right slide (6-5); The left clamp (6-1) and the right clamp (6-2) are respectively connected to the left slide (6-4) and the right slide (6-5) by welding technology; The left clamp (6-1) and the right clamp (6-2) are used to directly contact the arc-shaped permanent magnet to be processed, and are fixed by bolts (6-6) and limiting holes (6-7); The left sliding platform (6-4) and the right sliding platform (6-5) are installed on the metal base (6-3) and can slide accurately along the axial direction; The metal base (6-3) is used to support the entire processing device and provide a reference surface during the processing; The left side slide (6-4) and the right side slide (6-5) are both designed to be rectangular; The left slide (6-4) and the right slide (6-5) are both equipped with bolts (6-6) and limiting holes (6-7) for adjusting the clamping force or realizing the replacement of the workpiece.

5. The method according to claim 4, characterized in that In step 2, the left slide (6-4) and the right slide (6-5) are adjusted to accommodate the arc-shaped permanent magnet, ensuring that the left clamp (6-1) and the right clamp (6-2) can firmly position the arc-shaped permanent magnet.

6. The method according to claim 5, characterized in that In step 3, the equivalent spiral permanent magnet processing method includes: The first cutting starting point is The arc-shaped permanent magnet is cut for the first time from the starting point of the first cutting along the lower left to the bottom of the left wall of the arc-shaped permanent magnet, and the remaining permanent magnet (7-2) on the left is separated from the arc-shaped permanent magnet; Next, at a cutting angle of Under the condition of The position is taken as the starting point of the second cutting, and the distance from the second cutting starting point along the lower left to the bottom of the left wall of the arc-shaped permanent magnet is At, thereby obtaining the first spiral permanent magnet; Still cutting at an angle of Under the condition of The position is taken as the starting point of the third cutting, and the distance from the third cutting starting point along the lower left to the bottom of the left wall of the arc-shaped permanent magnet is Thus, the second spiral permanent magnet is obtained; and so on, cutting is performed in sequence to obtain multiple spiral permanent magnet blocks (7-1); The last cut starts from the top of the right wall of the arc-shaped permanent magnet, and the cutting angle is still maintained at , cut from the top of the right wall of the arc-shaped permanent magnet along the lower left to the distance from the bottom of the right wall of the arc-shaped permanent magnet At the same time, the remaining permanent magnets (7-3) on the right are separated from the multiple spiral permanent magnet blocks (7-1).

7. The method according to claim 6, characterized in that In step 3, the cutting angle satisfy: , because , , ,get: 。 8. The method according to claim 7, characterized in that In step 3, the equivalent spiral permanent magnet processing method can cut the circular arc permanent magnet magnetized radially outward into the spiral permanent magnet magnetized radially outward (12-1), and cut the circular arc permanent magnet magnetized radially inward into the spiral permanent magnet magnetized radially inward (12-2); through the equivalent spiral permanent magnet processing method, more than two sections of spiral permanent magnets can be accurately processed in a single operation, and only two residual permanent magnets, the left residual permanent magnet (7-2) and the right residual permanent magnet (7-3), are generated.

9. The method according to claim 8, characterized in that In step 4, the surface fine treatment includes: using a grinding device to carefully grind the edge of the magnet to ensure that the surface is smooth and free of cracks; During assembly, the starting end of the second spiral permanent magnet is aligned with the end of the first spiral permanent magnet, the starting end of the third spiral permanent magnet is aligned with the end of the second spiral permanent magnet, and so on, until the starting end of the last spiral permanent magnet is aligned with the end of the penultimate spiral permanent magnet, ensuring that the spiral angle and magnetization direction of each segment are precisely consistent; according to the structural design of the magnetic transmission device, each segment of the spiral permanent magnet is firmly bonded by a non-magnetic adhesive.

10. The method according to any one of claims 1 to 9, characterized in that: In step 4, the equivalent spiral permanent magnet can be applied to motors, generators and other magnetic transmission devices to achieve efficient magnetic transmission.

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