High-efficiency and low-cost equivalent spiral permanent magnet processing method for magnetic drive device

Abstract

The present invention provides an efficient and low-cost equivalent spiral permanent magnet processing method for a magnetic transmission device. First, the inner diameter, outer diameter, pitch, pole pitch, thickness and number of turns of the spiral permanent magnet are determined. Then, the number of segments of the spiral permanent magnet and the center angle of each segment of the spiral permanent magnet under the pitch are determined, and then the center angle, pole pitch and thickness of the corresponding arc-shaped permanent magnet are determined. A working platform is used to fix the arc-shaped permanent magnet. By synchronously cutting the arc-shaped permanent magnet at a specific angle and direction, multiple segments of spiral permanent magnets with equivalent magnetic properties are obtained, thereby replacing the traditional single-piece spiral permanent magnet processing method to reduce material waste and reduce processing costs. In addition, the working platform design of the present invention can fix and process multiple permanent magnets in one operation, ensuring quality consistency and efficiency during the processing process. This method is not only suitable for small-batch production, but also can significantly improve the efficiency of large-scale production.

Description

Technical Field

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

[0002] Magnetic transmission devices are widely used in equipment such as electric motors and generators due to their advantages such as contactless power transmission, high thrust density, and high reliability. Magnetic screws, a typical magnetic transmission device, enable contactless conversion between linear and rotational motion, effectively eliminating friction and wear, significantly extending the life of the equipment, and reducing the need for lubrication and maintenance. Furthermore, magnetic transmission devices excel in vibration and shock resistance, energy transfer efficiency, and low-noise operation, offering broad application prospects in areas such as wave power generation, artificial hearts, and rail transit.

[0003] However, traditional methods for processing single-piece helical permanent magnets have significant limitations in terms of material utilization and cutting efficiency, and are prone to dimensional errors, which in turn affect the overall performance of magnetic transmission devices. This processing method is difficult to meet the needs of large-scale, low-cost production. Therefore, the industry urgently needs to develop an innovative method that can improve production efficiency, reduce costs, and ensure the accuracy and consistency of helical permanent magnets. Summary of the Invention

[0004] Purpose of the Invention: The present invention aims to address the difficulties inherent in the processing of spiral permanent magnets, particularly the low material utilization and inefficient cutting of conventional single-piece spiral permanent magnets. To this end, the present invention proposes a highly efficient and low-cost method for processing equivalent spiral permanent magnets for magnetic transmission devices. This method significantly improves processing efficiency and accuracy, reduces production costs, and ensures dimensional consistency and performance stability of the spiral permanent magnets by simultaneously performing high-precision bevel cutting on multiple permanent magnets.

[0005] The method comprises the following steps:

[0006] Step 1, determine the parameters required for permanent magnet processing;

[0007] Step 2: Establish a working platform and adjust the working platform to accommodate the arc-shaped permanent magnet;

[0008] Step 3: using the work 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 obtaining 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 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 circles 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 central 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 and the number of segments The central angle of each spiral permanent magnet Same size, that is ; The number of segments The pole pitch 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 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 and right fixtures are designed with an open hole structure. The number of holes is not limited, and the specific positions of the holes can be adjusted according to actual processing requirements to adapt to different working conditions and permanent magnet sizes. The left and right fixtures 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 fixture and the right fixture are connected to the left slide and the right slide respectively 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 and avoid displacement or rotation;

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

[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 and right slides 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 workpieces.

[0026] In step 2, adjust the left and right slides to accommodate the arc-shaped permanent magnet, ensuring that the left and right fixtures 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 For the cutting angle, 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, separating the remaining permanent magnet on the left from the arc-shaped permanent magnet;

[0028] Then, 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 carried out 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 side wall of the arc-shaped permanent magnet along the lower left to the distance from the bottom of the right side wall of the arc-shaped permanent magnet At this point, the last spiral permanent magnet is obtained; at the same time, the remaining permanent magnets on the right are separated from the multiple spiral permanent magnets;

[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 the permanent magnet material and reducing the waste loss of the permanent magnet edge 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 with radially outward magnetization into the spiral permanent magnet with radially outward magnetization, and cut the circular arc permanent magnet with radially inward magnetization into the spiral permanent magnet with radially inward magnetization; 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, the starting end of the third spiral permanent magnet with the end of the second, and so on, until the starting end of the last spiral permanent magnet is aligned with the end of the second-to-last spiral permanent magnet, ensuring that the spiral angle and magnetization direction of each segment are precisely consistent. Based on the structural design of the magnetic transmission device, each segment of the spiral permanent magnet is firmly bonded using a dedicated non-magnetic adhesive.

[0038] To ensure the production of permanent magnets with two magnetization directions and optimize the performance of equivalent spiral permanent magnets, the spiral permanent magnets are cut and spliced from at least two circular arc-shaped permanent magnets. Each circular arc-shaped permanent magnet is precisely cut into at least two spiral segments. This equivalent spiral permanent magnet, cut and spliced from multiple circular arc-shaped permanent magnets, not only meets the requirements of different magnetization directions but also achieves more efficient and reliable magnetic performance.

[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 synchronized bevel cutting technology employed in this invention significantly improves material utilization and machining accuracy, simplifies the process flow, and reduces time and production costs. This technology effectively avoids the dimensional errors common in traditional single-piece machining. Due to its flexible and efficient design, the device is suitable for machining a variety of helical permanent magnets, 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 below in conjunction with the accompanying drawings and specific embodiments, and the above and / or other advantages of the present invention will become more apparent.

[0042] Figure 1 It is a schematic flow diagram 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 Schematic diagram of a working platform for cutting spiral permanent magnets according to the present invention;

[0048] Figure 7 Schematic diagram of the structure of the arc-shaped permanent magnet after cutting using the processing method of the present invention;

[0049] Figure 8 2. It is a two-dimensional schematic diagram of the arc-shaped permanent magnet after being cut using the processing method of the present invention;

[0050] Figure 9 This is a schematic diagram of the structure of an arc-shaped permanent magnet after cutting using traditional processing methods;

[0051] Figure 10 This is a two-dimensional schematic diagram of an arc-shaped permanent magnet after cutting using traditional processing methods;

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

[0053] Figure 12 It is a schematic diagram of multiple spiral permanent magnets spliced together to form an equivalent spiral permanent magnet;

[0054] Figure 13 This is a comparison chart of the output thrust of magnetic screws using spiral permanent magnets and equivalent spiral permanent magnets;

[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 remaining permanent magnet on the left; 7-3 represents the remaining permanent magnet on the right; 8-1 represents the two-dimensional multi-piece spiral permanent magnet block; 8-2 represents the two-dimensional remaining permanent magnet on the left; 8-3 represents the two-dimensional remaining permanent magnet on the right; 9-1 represents the single-piece spiral permanent magnet block; 9-2 represents the remaining permanent magnet on the left; 9-3 represents the remaining permanent magnet on the right; 10-1 represents the two-dimensional single-piece spiral permanent magnet block; 10-2 represents the two-dimensional remaining permanent magnet on the left; 10-3 represents the two-dimensional remaining permanent magnet on the right; 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 an efficient 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 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 and right slides to accommodate the arc-shaped permanent magnet, ensuring that the left and right fixtures 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 As the starting point, 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] Then, 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 distance from 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 The second spiral permanent magnet is obtained by cutting the magnet in this way.

[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 transmission performance between the various segments of the spiral permanent magnet during assembly, the cut pieces of the spiral permanent magnets must undergo surface treatment. Use grinding equipment to carefully polish the edges of the magnets to ensure a smooth, crack-free surface, ensuring 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, the starting end of the third spiral permanent magnet with the end of the second, and so on, until the starting end of the last spiral permanent magnet is aligned with the end of the second-to-last spiral permanent magnet, ensuring that the spiral angle and magnetization direction of each segment are precisely consistent. Based on the structural design of the magnetic transmission device, each segment of the spiral permanent magnet is firmly bonded using a dedicated 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 and the number of segments The central angle of each spiral permanent magnet Same size, that is ; The number of segments The pole pitch 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 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 precisely in 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 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 that the arc-shaped permanent magnet is maintained stable 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 precisely 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 rapid replacement of workpieces.

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

[0078] The high-efficiency and low-cost equivalent spiral permanent magnet processing method for a magnetic transmission device can effectively separate a 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 a 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 separating 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 separating 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 Figure 11 As shown, as the number of segments used to process the spiral permanent magnet increases, the processing method proposed by the present invention can significantly reduce the consumption of permanent magnet material, thereby significantly increasing the amount of permanent magnet material saved 11-1. This not only improves the utilization rate of permanent magnet material, but also reduces production costs, providing a cost-effective solution for the manufacture of spiral permanent magnets.

[0082] like Figure 12 As shown, the equivalent spiral permanent magnet processing method covers the assembly process of spiral permanent magnets. It can flexibly select specific splicing methods and angles based on actual working conditions and technical requirements to tightly assemble the radially outwardly magnetized spiral permanent magnet 12-1 and the radially inwardly magnetized spiral permanent magnet 12-2 to ensure optimal 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 processing flexibility and overall efficiency.

[0083] like Figure 13 As shown in Figure 2, the output thrust of a magnetic screw using a helical permanent magnet and its equivalent segmented assembly was calculated and analyzed. The results show that the output thrust of the magnetic screws of the two designs is highly consistent. This finding further verifies that the segmented assembly of helical permanent magnets is not only theoretically feasible but also practical, providing an efficient and flexible alternative for the design and manufacture of magnetic screws.

[0084] The present invention provides a highly efficient and low-cost method for machining equivalent spiral permanent magnets for magnetic transmission devices. Numerous methods and approaches exist for implementing this technical solution. The foregoing merely represents a preferred embodiment of the present invention. It should be noted that those skilled in the art may make numerous improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Components not specified in this embodiment may be implemented using 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: Establish a working platform and adjust the working platform to accommodate the arc-shaped permanent magnet; Step 3, using the work 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 surface fine processing on the cut multiple spiral permanent magnet blocks (7-1), and then assembling them; Step 1 includes: Step 1-1, determine the inner diameter D of the helical permanent magnet pi , outer diameter D po , pitch λ, pole pitch τ p , thickness h p and the number of circles r; Step 1-2, determining the number n of segments of the spiral permanent magnet under the pitch λ and the central angle θ of each segment of the spiral permanent magnet under the number n of segments; Step 1-3, determine the central angle θ′ and pole pitch τ of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet under the segment number n z , thickness h p ′, the width of the remaining permanent magnet Δz; In step 1-1, the inner diameter D of the spiral permanent magnet pi , outer diameter D po and thickness h p Satisfied: D po =D pi +h p ; Pitch λ and pole pitch τ p Satisfies: λ = 2τ p ; In step 1-2, the central angle θ of each segment of the spiral permanent magnet under the number n of segments satisfies: In steps 1-3, the central angle θ′ of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet under the segment number n is consistent with the central angle θ of each segment of the spiral permanent magnet under the segment number n, that is, θ′=θ; the pole pitch τ of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet under the segment number n is z Satisfy: τ z =r×τ p +Δz, Right now The thickness h of the arc-shaped permanent magnet corresponding to each segment of the spiral permanent magnet under the segment number n p ′ and the thickness of the helical permanent magnet h p The same size, that is, h p ′=h p ; 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 a limit hole (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 slide (6-4) and the right slide (6-5) are mounted on the metal base (6-3) and are capable of precise sliding 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; 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 fixture (6-1) and the right fixture (6-2) can firmly position the arc-shaped permanent magnet; In step 3, the equivalent spiral permanent magnet processing method includes: taking the position Δz from the top of the left wall of the arc-shaped permanent magnet as the first cutting starting point, taking α as the cutting angle, performing a first cutting on the arc-shaped permanent magnet, cutting from the first cutting starting point along the lower left to the bottom of the left wall of the arc-shaped permanent magnet, and separating the remaining permanent magnet (7-2) on the left from the arc-shaped permanent magnet; Then, under the condition of cutting angle α, the distance from the starting point of the first cutting is τ p The position is taken as the starting point of the second cutting, and the distance τ from the second cutting starting point is cut along the lower left to the bottom of the left wall of the arc-shaped permanent magnet. p At, thereby obtaining the first spiral permanent magnet; Still under the condition of cutting angle α, the distance from the second cutting starting point is τ p 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 2τ p Thus, the second spiral permanent magnet is obtained; and so on, cutting in sequence to obtain multiple spiral permanent magnet blocks (7-1); The last cut starts from the top of the right side of the arc-shaped permanent magnet, and the cutting angle is still kept at α. It is cut from the top of the right side of the arc-shaped permanent magnet along the lower left to the distance τ from the bottom of the right side of the arc-shaped permanent magnet. p At this point, the last spiral permanent magnet is obtained; at the same time, the remaining permanent magnets (7-3) on the right are separated from the multiple spiral permanent magnet blocks (7-1); In step 3, the cutting angle α satisfies: because D po =D pi +h p , θ′=θ, we get: In step 3, the equivalent spiral permanent magnet processing method can cut the radially outwardly magnetized arc-shaped permanent magnet into a radially outwardly magnetized spiral permanent magnet (12-1), and cut the radially inwardly magnetized arc-shaped permanent magnet into a radially inwardly magnetized spiral permanent magnet (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, while only two residual permanent magnets, the left residual permanent magnet (7-2) and the right residual permanent magnet (7-3), are generated. 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; 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, aligning them in sequence until the starting end of the last spiral permanent magnet is aligned with the end of the second-to-last 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 using a non-magnetic adhesive; In step 4, the equivalent spiral permanent magnet can be applied to motors, generators and other magnetic transmission devices to achieve efficient magnetic transmission.

Images