A double-sided axial halbach magnet field press

Abstract

The application discloses a double-end-face axial Halbach magnetic field press, which is used for sintering neodymium-iron-boron powder forming and producing axial up-down end-face multi-pole (same-pole) integrated Halbach magnetic ring or circular magnetic sheet; the press body is composed of a rack, an upper press beam, a lower press beam, a stand, a servo pressure electric cylinder and upper and lower press head excitation assemblies; a die assembly comprises a female die, a female die mounting plate, a locking cylinder, an upper male die and a lower male die; the female die is composed of multiple fan-shaped structures and is controlled to be opened and closed through the locking cylinder; the upper and lower male dies are internally provided with rotatable excitation structures capable of generating alternating stable change fan-shaped magnetic fields to precisely excite the magnetic powder, and the excitation is synchronously performed with pressing; the application solves the problems of single forming pole number and uneven magnetic field distribution in the prior art, has the advantages of high die generality, high product quality, high production efficiency and low cost, and has a good application prospect in the related magnetic material manufacturing field.

Description

Technical Field

[0001] This invention relates to the field of sintered NdFeB powder forming equipment and mold technology, specifically to a double-end-face axial Halebeck magnetic field press. Background Technology

[0002] Sintered NdFeB magnets have been widely used in many fields such as permanent magnet motors, magnetic gears, magnetic levitation bearings, and medical MRI systems due to their excellent magnetic properties. Heilbeck magnetic rings, as a type of magnet with a special structure, can form a stronger and more concentrated magnetic field through specific magnetization methods, thereby significantly improving the performance of related equipment.

[0003] However, there are many problems that urgently need to be solved in the current production process of integral sintered NdFeB Helbeck rings; the existing integral sintered NdFeB Helbeck rings on the market have extremely limited models, with Helbeck magnetic rings without end-face axial structures, and their magnetic field distribution is uneven; for end-face axial multipole magnetic rings, most products adopt splicing structures, but splicing structures have a series of problems such as difficulty in confining the magnetic field, uneven distribution, need for anti-detachment treatment, complex structural installation, poor dynamic balance and structural stability.

[0004] Existing radial orientation conventional toroidal magnetic field presses cannot be used for integral sintering of NdFeB Helbeck rings with end-face axial multipole orientation. Radial rings, which are also radial orientation, cannot be used for forming multipole axial orientation Helbeck magnetic rings because their rotating magnetic field is a DC constant current output and cannot complete multipole AC commutation output.

[0005] Therefore, there is an urgent need for a magnetic field compressor that can solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a double-end-face axial Halbec magnetic field press, which aims to solve the problems of inability to achieve end-face axial multi-pole excitation, uneven magnetic field distribution, and poor equipment applicability in the production of integral sintered NdFeB Halbec rings in the prior art, so as to achieve efficient and high-quality forming of integral Halbec magnetic rings or sheets with multiple end-face axial poles.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] A double-end-face axial Heilbeck magnetic field press includes a press body and a mold assembly;

[0009] The press body includes a frame, an upper press beam, a lower press beam, a column, a servo pressure cylinder, and an upper and lower press head excitation assembly;

[0010] The upper beam and lower beam of the press are mounted on the frame via columns;

[0011] The servo pressure electric cylinder is installed on the upper beam of the press, and its output end is connected to the upper part of the upper and lower pressure head excitation assembly.

[0012] The upper and lower pressure head excitation assembly is located between the upper beam and the lower beam of the press.

[0013] The mold assembly includes a die cavity, a die cavity mounting plate, a locking cylinder, an upper punch, and a lower punch.

[0014] The die mounting plate is installed on the lower beam of the press;

[0015] The cavity mold is composed of more than 3 fan-shaped structures, which are set on the cavity mold mounting plate. After the cavity mold is closed, it forms a complete circle.

[0016] The locking cylinders are fixed inside the frame at uniform angles, and their output ends are connected to the fan-shaped structure of the die.

[0017] The upper and lower punches are cylindrical barrel-shaped structures with bottoms, made of high-strength non-magnetic steel. The upper punch is set corresponding to the upper part of the upper and lower pressure head excitation assembly, and the lower punch is set below the die corresponding to the upper punch.

[0018] Both the upper and lower punches are equipped with an excitation structure consisting of a stepper motor, a magnetic yoke, an excitation coil, and pole shoes. The magnetic yoke is connected to the stepper motor via a rotating shaft. The excitation coil is wound around the magnetic yoke. The pole shoes are located at both ends of the magnetic yoke. The pole shoes at both ends of the excitation structure converge into a linear shape.

[0019] The upper and lower punches are also provided with slip rings and carbon brushes.

[0020] In a preferred embodiment, the concave mold is composed of four fan-shaped structures, each with the same curvature, resulting in a smooth inner wall of the circular concave mold after mold closing.

[0021] In a preferred embodiment, the number of locking cylinders is the same as the number of sector structures in the die cavity, and the output force of each locking cylinder is consistent, so as to ensure that each sector structure is subjected to uniform force when the die cavity is closed.

[0022] In a preferred embodiment, four columns are provided, located at the four corners of the upper beam and lower beam of the press, respectively. The columns are made of high-strength alloy steel and the surface is treated with wear-resistant material.

[0023] In a preferred embodiment, the magnetic yoke is made of stacked silicon steel sheets with high magnetic permeability to reduce hysteresis loss and eddy current loss.

[0024] In a preferred embodiment, the excitation coil is made of enameled copper wire, the diameter of which is determined according to the required excitation current, and the coil is wrapped with an insulating high-temperature resistant material.

[0025] In a preferred embodiment, the pole shoe is made of pure iron, and its converging linear end is parallel to the bottom circular surfaces of the upper and lower punches, with the distance between them not exceeding 2mm.

[0026] In a preferred embodiment, the slip rings are coaxially arranged with the rotating shaft, the number of slip rings is the same as the number of leads of the excitation coil, and the surface of the slip rings is plated with a wear-resistant conductive layer.

[0027] In a preferred embodiment, the carbon brush is in close contact with the slip ring, the carbon brush is made of high-purity graphite material, and is equipped with an elastic mechanism that automatically compensates for wear.

[0028] In a preferred embodiment, the pressure adjustment range of the servo pressure cylinder is 0-500kN, the pressure control accuracy is ±1kN, and the pressure closed-loop control during the pressing and molding process is realized through the control system.

[0029] Due to the application of the above technical solution, the beneficial effects of this application compared with the prior art are as follows:

[0030] 1. The concave mold of the present invention is composed of three or more fan-shaped structures. The mold closing and opening are controlled by cylinders with uniformly distributed angles, which can adapt to the molding requirements of magnetic rings or magnetic sheets of different specifications, and improve the flexibility and versatility of the mold.

[0031] 2. The upper and lower punches are equipped with a rotatable excitation structure driven by a stepper motor. When rotating, a periodically changing alternating current is passed through to form an alternating and stable fan-shaped magnetic field, which can achieve precise excitation of magnetic powder, ensure the uniformity of magnetic field distribution of magnetic ring or magnetic sheet, and solve the problem of uneven magnetic field distribution in the prior art.

[0032] 3. Excitation and pressing are carried out simultaneously, which improves production efficiency and product quality. It can produce axial multi-pole (same pole) integral Heilbeck magnetic rings or circular magnetic sheets, which can meet the diverse needs of different customers and application scenarios for Heilbeck magnetic rings.

[0033] 4. The overall structure is reasonably designed and easy to operate, which reduces equipment investment, production costs and cycle time, and has a positive role in promoting the development of related industries.

[0034] 5. All components are made of high-quality materials and are rationally designed. For example, the columns are made of high-strength alloy steel with wear-resistant surface treatment, and the magnetic yoke is made of high-permeability silicon steel sheets, which greatly improves the performance and service life of the equipment. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the overall structure of a double-end-face axial Heilbeck magnetic field press according to the present invention;

[0037] Figure 2 This is a schematic diagram of the concave mold structure of the present invention;

[0038] Figure 3 This is a schematic diagram showing the fit between the mold assembly and the excitation structure of the present invention;

[0039] Figure 4 This is a schematic diagram of two views of the excitation structure of the present invention;

[0040] Figure 5 This is a schematic diagram of the excitation structure of the present invention rotating at a certain angle to produce a fan-shaped magnetic field.

[0041] Figure 6 This is a schematic diagram of the magnetic field structure of the final pressed double-end multipole Hellbeck magnetic sheet of the present invention.

[0042] The components include: 1. Servo pressure cylinder; 2. Press upper beam; 3. Column; 4. Upper and lower pressure head excitation assembly; 5. Die; 6. Locking cylinder; 7. Press lower beam; 8. Frame; 9. Die mounting plate; 10. Upper punch; 11. Lower punch; 12. Stepper motor; 13. Slip ring; 14. Carbon brush; 15. Shaft; 16. Magnetic yoke; 17. Excitation coil; 18. Pole shoe. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0044] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0045] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0046] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0047] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0048] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] Example 1

[0050] Please see Figure 1-3 This application provides a double-end-face axial Heilbeck magnetic field press, including a press body and a mold assembly;

[0051] The press body includes a frame 8, an upper press beam 2, a lower press beam 7, columns 3, a servo pressure cylinder 1, and an upper and lower press head excitation assembly 4. The upper press beam 2 and the lower press beam 7 are mounted on the frame 8 via the columns 3. The servo pressure cylinder 1 is mounted on the upper press beam 2, and its output end is connected to the upper part of the upper and lower press head excitation assembly 4. The upper and lower press head excitation assembly 4 is located between the upper press beam 2 and the lower press beam 7. Four columns 3 are provided, located at the four corners of the upper press beam 2 and the lower press beam 7. Made of high-strength alloy steel with a wear-resistant surface treatment, this design ensures sufficient structural strength and stability of the press body during operation, reducing wear caused by long-term use and extending the service life of the equipment. The servo pressure cylinder 1 has a pressure adjustment range of 0-500kN and a pressure control accuracy of ±1kN. It can also achieve closed-loop pressure control during the pressing process through the control system. This allows the equipment to precisely adjust the pressure according to different production needs, ensuring the forming quality of magnetic rings or magnetic sheets.

[0052] The mold assembly includes a concave mold 5, a concave mold mounting plate 9, a locking cylinder 6, an upper punch 10, and a lower punch 11. The concave mold mounting plate 9 is mounted on the lower beam 7 of the press. The concave mold 5 is composed of three or more fan-shaped structures and is set on the concave mold mounting plate 9. After the concave mold 5 is closed, it can form a complete circle. Preferably, the concave mold 5 is composed of four fan-shaped structures with the same curvature. After the mold is closed, the inner wall of the circular concave mold 5 is smooth. This design not only facilitates the filling of magnetic powder and demolding after molding, but also ensures the dimensional accuracy and surface quality of the molded product. The locking cylinders 6 are evenly distributed at an angle and fixed inside the frame 8. Their output ends are connected to the fan-shaped structures of the concave mold 5 and are used to pull the concave mold 5 to close and open. The number of locking cylinders 6 is the same as the number of fan-shaped structures of the concave mold 5, and the output force of each locking cylinder 6 is the same to ensure that each fan-shaped structure is subjected to uniform force when the concave mold 5 is closed, and to avoid uneven force causing the concave mold 5 to close loosely, thus affecting the molding quality of the product.

[0053] The upper punch 10 and lower punch 11 are cylindrical barrel-shaped structures with bottoms, made of high-strength non-magnetic steel. The upper punch 10 is correspondingly set to the upper part of the upper and lower pressure head excitation assembly 4, and the lower punch 11 is set below the die 5 corresponding to the upper punch 10. The upper punch 10 and lower punch 11 are each equipped with an excitation structure consisting of a stepper motor 12, a magnetic yoke 16, an excitation coil 17, and pole shoes 18. The magnetic yoke 16 is connected to the stepper motor 12 through a rotating shaft 15. The excitation coil 17 is wound on the magnetic yoke 16, and the pole shoes 18 are located at both ends of the magnetic yoke 16. The pole shoes 18 at both ends of the excitation structure converge into a linear shape. The magnetic yoke 16 is made of high-permeability silicon steel sheets stacked and pressed together. The system is designed to reduce hysteresis and eddy current losses and improve the utilization efficiency of the magnetic field. The excitation coil 17 is made of enameled copper wire, the diameter of which is determined according to the required excitation current. The coil is also wrapped with insulating high-temperature resistant material, which not only meets the requirements of different excitation intensities but also ensures the safety and stability of the coil during operation, preventing equipment operation from being affected by high temperature or insulation damage. The pole shoe 18 is made of pure iron, and its converging linear end is parallel to the bottom circular surface of the upper punch 10 and the lower punch 11, with a distance between them not exceeding 2mm. This design allows the magnetic field to act more concentratedly on the magnetic powder, improving the excitation effect.

[0054] The upper punch 10 and lower punch 11 are also provided with slip rings 13 and carbon brushes 14 for supplying power to the excitation coil 17. The slip rings 13 are coaxially arranged with the rotating shaft 15, and the number of slip rings 13 is the same as the number of leads of the excitation coil 17. The surface of the slip rings 13 is coated with a wear-resistant conductive layer to ensure that the slip rings 13 can conduct electricity stably during rotation, while reducing wear and extending service life. The carbon brushes 14 are in close contact with the slip rings 13. The carbon brushes 14 are made of high-purity graphite material and are provided with an elastic mechanism that automatically compensates for wear, ensuring that the carbon brushes 14 and the slip rings 13 always maintain good contact and ensure the stability of power transmission.

[0055] During operation, the stepper motor 12 drives the excitation structure to rotate, and at the same time, a periodically changing alternating current is supplied to the excitation coil 17, so that the excitation structure forms an alternating and stable fan-shaped magnetic field. The magnetic field excites the magnetic powder in the die 5 through the bottom circular surfaces of the upper punch 10 and the lower punch 11. At the same time as the excitation, the servo pressure cylinder 1 drives the upper punch 10 to move downward, and cooperates with the lower punch 11 to press the magnetic powder, thus completing the molding of neodymium iron boron magnetic powder.

[0056] Example 2

[0057] like Figure 1-2 As shown, a double-end-face axial Heilbeck magnetic field press of the present invention includes a press body and a mold assembly;

[0058] The press body includes a frame 8, an upper press beam 2, a lower press beam 7, columns 3, a servo pressure cylinder 1, and an upper and lower press head excitation assembly 4. The upper press beam 2 and the lower press beam 7 are fixedly mounted on the frame 8 by four columns 3, forming a stable frame structure. These four columns 3 are located at the four corners of the upper press beam 2 and the lower press beam 7, respectively, and are made of high-strength alloy steel with wear-resistant surface treatment. They can effectively withstand various forces generated during equipment operation and ensure the overall stability of the equipment. The servo pressure cylinder 1 is vertically mounted at the center of the upper press beam 2, and its output axis extends downward and connects to the upper part of the upper and lower press head excitation assembly 4. The pressure adjustment range of the servo pressure cylinder 1 is 0-500kN, the pressure control accuracy is ±1kN, and the pressure closed-loop control during the pressing process can be realized through the control system, enabling precise application of pressure according to production needs.

[0059] The mold assembly includes a die cavity 5, a die cavity mounting plate 9, a locking cylinder 6, an upper punch 10, and a lower punch 11. The die cavity mounting plate 9 is fixedly installed above the lower beam 7 of the press. The die cavity 5 is composed of four fan-shaped structures with the same curvature. They are installed on the die cavity mounting plate 9. After the four fan-shaped structures are closed, they form a complete circular die cavity 5, and the inner wall of the circular die cavity 5 is smooth. There are four locking cylinders 6, which are evenly distributed and fixed inside the frame 8. The output end of each locking cylinder 6 is connected to one of the fan-shaped structures of the die cavity 5, and the output force of each locking cylinder 6 is the same. Through the extension and retraction of the locking cylinders 6, it can be ensured that the force on each fan-shaped structure is uniform when the die cavity 5 is closed, so as to achieve tight closing and smooth separation of the die cavity 5.

[0060] Both the upper punch 10 and the lower punch 11 are cylindrical barrel-shaped structures with bottoms, made of high-strength non-magnetic steel to avoid interference with the magnetic field. The upper punch 10 is located below the upper and lower pressure head excitation assembly 4 and is linked to the output shaft of the servo pressure cylinder 1. The lower punch 11 is fixedly installed on the die mounting plate 9 at the position corresponding to the upper punch 10. The bottom circular surfaces of the upper punch 10 and the lower punch 11 correspond to the cavity of the die 5.

[0061] like Figure 3 and Figure 4As shown, both the upper punch 10 and the lower punch 11 have an excitation structure inside. The excitation structure consists of a magnetic yoke 16, an excitation coil 17, and pole shoes 18. The magnetic yoke 16 is made of high-permeability silicon steel sheets stacked together to reduce hysteresis loss and eddy current loss. The excitation coil 17 is made of enameled copper wire, the diameter of which is determined according to the required excitation current. The coil is wrapped with insulating high-temperature resistant material to ensure safe and stable operation. The pole shoes 18 are fixedly installed at both ends of the magnetic yoke 16 and are made of pure iron. Their converging linear ends are parallel to the bottom circular surfaces of the upper punch 10 and the lower punch 11, and the distance between them does not exceed 2mm, which is beneficial for the concentration of the magnetic field. The magnetic yoke 16 is connected to the output shaft of the stepper motor 12 through a rotating shaft 15. The stepper motor 12 is fixedly installed outside the upper punch 10 and the lower punch 11 and can drive the excitation structure to rotate around the rotating shaft 15.

[0062] The upper punch 10 and lower punch 11 are also equipped with slip rings 13 and carbon brushes 14. The slip rings 13 are coaxially arranged with the rotating shaft 15, and the number of slip rings 13 is the same as the number of leads of the excitation coil 17. The surface of the slip rings 13 is coated with a wear-resistant conductive layer. The carbon brushes 14 are in close contact with the slip rings 13. The carbon brushes 14 are made of high-purity graphite material and are equipped with an elastic mechanism that automatically compensates for wear. Through the cooperation of the slip rings 13 and the carbon brushes 14, a stable power is provided to the rotating excitation coil 17.

[0063] The working process is as follows: First, the locking cylinder 6 is activated, pulling the fan-shaped structure of the die 5 to close, forming a complete circular cavity; neodymium iron boron magnetic powder is filled into the cavity of the die 5; then, the stepper motor 12 starts, driving the excitation structure to rotate, and simultaneously, a periodically changing alternating current is supplied to the excitation coil 17 through the slip ring 13 and carbon brush 14, causing the excitation structure to generate an alternately stable fan-shaped magnetic field (such as... Figure 5 As shown), the magnetic field excites the magnetic powder inside the die 5 through the bottom circular surfaces of the upper punch 10 and the lower punch 11. Simultaneously, the servo pressure cylinder 1 drives the upper punch 10 downwards, cooperating with the lower punch 11 to apply pressure to the magnetic powder. The pressure can be adjusted within the range of 0-500kN as needed, with a control accuracy of ±1kN. Closed-loop pressure control is achieved through the control system to complete the molding of the magnetic powder. After molding, the servo pressure cylinder 1 drives the upper punch 10 to reset upwards, the locking cylinder 6 actuates, and pushes the fan-shaped structure of the die 5 apart, removing the molded double-end multipole Helbeck magnetic sheet (whose magnetic field structure is shown in the diagram). Figure 6 (As shown).

[0064] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double-end-face axial Hellbeck magnetic field press, characterized in that, Includes the press body and mold assembly; The press body includes a frame, an upper press beam, a lower press beam, a column, a servo pressure cylinder, and an upper and lower press head excitation assembly; The upper beam and lower beam of the press are mounted on the frame via columns; The servo pressure electric cylinder is installed on the upper beam of the press, and its output end is connected to the upper part of the upper and lower pressure head excitation assembly. The upper and lower pressure head excitation assembly is located between the upper beam and the lower beam of the press. The mold assembly includes a die cavity, a die cavity mounting plate, a locking cylinder, an upper punch, and a lower punch. The die mounting plate is installed on the lower beam of the press; The cavity mold is composed of more than 3 fan-shaped structures, which are set on the cavity mold mounting plate. After the cavity mold is closed, it forms a complete circle. The locking cylinders are fixed inside the frame at uniform angles, and their output ends are connected to the fan-shaped structure of the die. The upper and lower punches are cylindrical barrel-shaped structures with bottoms, made of high-strength non-magnetic steel. The upper punch is set corresponding to the upper part of the upper and lower pressure head excitation assembly, and the lower punch is set below the die corresponding to the upper punch. Both the upper and lower punches are equipped with an excitation structure consisting of a stepper motor, a magnetic yoke, an excitation coil, and pole shoes. The magnetic yoke is connected to the stepper motor via a rotating shaft. The excitation coil is wound around the magnetic yoke. The pole shoes are located at both ends of the magnetic yoke. The pole shoes at both ends of the excitation structure converge into a linear shape. The upper and lower punches are also provided with slip rings and carbon brushes.

2. The double-end-face axial Halebeck magnetic field press according to claim 1, characterized in that, The concave mold is composed of three or more fan-shaped structures, each with the same curvature, and the inner wall of the circular concave mold formed after mold closing is smooth.

3. The double-end-face axial Halebeck magnetic field press according to claim 1, characterized in that, The number of locking cylinders is the same as the number of sector structures in the die, and the output force of each locking cylinder is consistent, so as to ensure that each sector structure is subjected to uniform force when the die is closed.

4. The double-end-face axial Halebeck magnetic field press according to claim 1, characterized in that, The column has four supports, located at the four corners of the upper beam and lower beam of the press. The columns are made of high-strength alloy steel and the surface is treated with wear resistance.

5. The double-end-face axial Halebeck magnetic field press according to claim 1, characterized in that, The magnetic yoke is made of stacked silicon steel sheets with high magnetic permeability to reduce hysteresis loss and eddy current loss.

6. The double-end-face axial Halebeck magnetic field press according to claim 1, characterized in that, The excitation coil is made of enameled copper wire, the diameter of which is determined according to the required excitation current, and the coil is wrapped with insulating and high-temperature resistant material.

7. The double-end-face axial Halebeck magnetic field press according to claim 1, characterized in that, The pole shoe is made of pure iron, and its converging linear end is parallel to the bottom circular surface of the upper and lower punches, with the distance between them not exceeding 2mm.

8. The double-end-face axial Halebeck magnetic field press according to claim 1, characterized in that, The slip rings are coaxially arranged with the rotating shaft, and the number of slip rings is the same as the number of leads of the excitation coil. The surface of the slip rings is plated with a wear-resistant conductive layer.

9. The double-end-face axial Halebeck magnetic field press according to claim 1, characterized in that, The carbon brush is in close contact with the slip ring. The carbon brush is made of high-purity graphite material and is equipped with an elastic mechanism that automatically compensates for wear.

10. The double-end-face axial Halebeck magnetic field press according to claim 1, characterized in that, The servo pressure cylinder has a pressure adjustment range of 0-500kN and a pressure control accuracy of ±1kN. It also achieves closed-loop pressure control during the pressing process through a control system.

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