Production process of monolithic surface unipolar magnetic steel body
The magnetic core was prepared by using a mixture of high-purity rare earth metal element powders and a molding and sintering process. Combined with nickel plating and a composite structure, the production problem of unipolar magnets was solved, and stable production and levitation superposition effects of unipolar magnets were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 王沈河
- Filing Date
- 2026-04-03
- Publication Date
- 2026-06-12
AI Technical Summary
Current technology has failed to effectively produce monolithic surface unipolar magnets, and scientists have not yet developed the formula and processing technology for unipolar permanent magnets.
A magnetic core is prepared by using a mixture of high-purity rare earth metal element powders through molding and sintering processes. Combined with a nickel plating layer and a composite structure, a magnetic steel body with unipolar magnetism is formed and magnetized under a strong pulsed magnetic field.
Stable production of unipolar magnets has been achieved. They have strong repulsive forces between the same poles, enabling non-contact superposition and levitation in vertical or horizontal directions. They also have high structural strength, good environmental adaptability, and long service life.
Smart Images
Figure CN122201986A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of magnetic steel body technology, and more specifically, to a manufacturing process for an integral surface unipolar magnetic steel body. Background Technology
[0002] Currently used permanent magnets, or permanent magnet steel bodies, are generally made from a combination of several rare earth metal elements, such as ferrite magnets and neodymium iron boron magnets. Neodymium iron boron magnets, in particular, have a unique metal element composition. Permanent magnet steel bodies manufactured using this composition and process exhibit polarity because the magnetic particles typically appear in pairs as dipoles (north and south poles). They do not produce unipolar magnetism, hence the existence of unipolar permanent magnet steel bodies is a subject of debate in the scientific community, as scientists have not yet developed such a composition and manufacturing process. So, if you take a rectangular bipolar permanent magnet steel body, with one end being positive and the other negative, and cut it in half, do you get two unipolar permanent magnet steel bodies? The answer is no. You will get two bipolar permanent magnet steel bodies, no matter how many times you cut it, until it becomes countless atomic states; it will still be a bipolar permanent magnet steel body. Therefore, how to break through bottlenecks, surpass oneself, and creatively produce unipolar permanent magnet steel bodies with only unipolar magnetism by adopting a brand-new raw material formula and special structural processing and production process can be said to be one of the important research directions of 21st-century physics scientists. A production process for unipolar magnet steel bodies with an integral surface is needed to solve these problems. Summary of the Invention
[0003] The purpose of this invention is to provide a manufacturing process for integral surface unipolar magnets to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, the present invention provides the following technical solution: an integral surface unipolar magnet body, comprising a first magnet body, a second magnet body disposed on one side of the first magnet body, a magnetic core installed inside the first magnet body and the outer end of the magnetic core being provided with a mixture of elemental powders composed of various metal elements.
[0005] As a preferred embodiment of the present invention, the magnetic core includes magnetic sheets and steel sheets, and the magnetic core is made by adding seven steel sheets to six magnetic sheets.
[0006] As a preferred embodiment of the present invention, both the first magnet body and the second magnet body are provided with a nickel plating layer, the thickness of which is 0.25 mm.
[0007] As a preferred embodiment of the present invention, it is characterized by comprising the following steps: S1. Prepare high-purity rare earth metal element powders, take a specific weight percentage ratio, and put the weighed multiple metal powders into a mixer for thorough and uniform dry mixing to ensure that each element is evenly distributed at the microscopic level and form a homogeneous alloy powder mixture. S2. Prepare a square molding die, fill the mold cavity with the mixed alloy powder, bond it with adhesive or bonding agent, and perform the first molding under high pressure to press it into a dense green blank. S3. The green blank formed by the first molding is sliced according to the design size to obtain magnetic sheets. The magnetic sheets are then assembled using an alternating stacking structure of "six magnetic sheets plus seven steel sheets". The specific sequence is as follows: starting with one magnetic sheet, steel sheets and magnetic sheets are stacked alternately to ensure that the total number of magnetic sheets and seven steel sheets is six magnetic sheets and seven steel sheets, forming a composite "magnetic core" prefabricated body. S4. Prepare the metal oxide powder for the outer layer, and mix the oxide powder thoroughly to form an outer layer powder mixture. S5. Prepare a molding die for the final product's shape and size. Precisely embed the magnetic core prepared in the first stage into the center of the die and fix it in place. Fill the die with the mixed outer oxide powder, surrounding the central magnetic core. When filling, ensure that the powder is evenly distributed in all directions (up, down, left, right) of the magnetic core. Perform a second bonding or adhesive molding to form a unipolar permanent magnet steel body. S6. Place the cured blank into a high-temperature sintering furnace and perform necessary dimensional finishing on the sintered blank to achieve the precise dimensions and surface finish requirements of the final product. S7. Electroplating nickel is performed on the permanent magnet steel body that has been sintered and finished. The product is placed in an electrolyte containing nickel salt as the cathode. Under the set current, temperature and time parameters, a dense nickel plating layer is uniformly deposited on the surface of the permanent magnet steel body through electrolysis.
[0008] S8. Place the processed permanent magnet steel body in a strong pulse magnetic field magnetization device. During magnetization, the direction of the magnetic field is consistent with or works in tandem with the inherent magnetic domain direction of the embedded magnetic core.
[0009] As a preferred technical solution of the present invention, the high-purity rare earth in step S1 mainly includes cerium (Ce), praseodymium (Pr), yttrium (Y), neodymium (Nd), nickel (Ni) and iron (Fe), wherein the proportion of high-purity rare earth components is 20% cerium, 20% praseodymium, 20% yttrium, 20% neodymium, 10% nickel and 10% iron.
[0010] As a preferred technical solution of the present invention, the components in step S2 that correspond to the metal elements of the inner magnetic core are mainly: cerium oxide, praseodymium oxide, yttrium oxide, neodymium oxide, nickel oxide, and iron oxide.
[0011] As a preferred embodiment of the present invention, the steel sheets in the magnetic core are all made of 45 high-carbon steel, and the 45 high-carbon steel sheets in the magnetic core are all 1 / 5 the thickness of the magnetic sheet.
[0012] As a preferred technical solution of the present invention, the unipolar permanent magnet steel body with unipolar magnetic effect produced by the rare earth metal element process and its embedded special structure is not limited in magnetization direction, can generate mutual repulsion of the same polarity, and can be superimposed and suspended.
[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention relates to a manufacturing process for integral surface unipolar magnets. The magnets utilize the properties of rare earth metal elements—a mixture of cerium, praseodymium, yttrium, neodymium, nickel, and iron—in a specific ratio. Through a unique magnetic field distribution achieved by embedding a special structure, the magnetic domain orientation on the integral surface undergoes a qualitative change, resulting in pure like-pole repulsion and superimposed levitation. Since the opposing surfaces of two such magnets are of the same polarity, they generate a strong repulsive force, enabling multiple magnets to achieve stable, non-contact superimposed levitation in the vertical or horizontal direction. The integrated molding process, employing powder metallurgy molding and high-temperature sintering, combines the embedded magnetic core with the outer substrate into a dense whole, resulting in high structural strength, resistance to demagnetization, and an outer nickel plating layer that effectively prevents oxidation and corrosion of the rare earth materials, improving environmental adaptability and service life.
[0014] This invention is a manufacturing process for integral surface unipolar magnetic steel bodies. Through a process of "two moldings and one sintering", the complex internal structure and external shape are formed in one step, avoiding complex subsequent assembly. Using some oxide powder as the outer layer material, while ensuring functionality, it helps to reduce the amount of expensive rare earth pure metals used. 45 high carbon steel sheets are introduced into the magnetic core, and their high magnetic permeability and high strength characteristics enhance the magnetic field guiding effect and improve the overall mechanical strength of the magnetic core. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of an integral surface unipolar magnet according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of an integral surface unipolar magnet according to an embodiment of the present invention.
[0017] Figure label: 1. First magnet body; 2. Second magnet body; 3. Magnetic core; 4. Magnetic sheet; 5. Steel sheet; 6. Element powder mixture; 7. Nickel plating layer. Detailed Implementation
[0018] The invention will now be further described with reference to the accompanying drawings and specific embodiments:
[0019] Example 1 refer to Figure 1 and Figure 2 Example 1 describes a first magnet body 1, a second magnet body 2 on one side of the first magnet body 1, a magnetic core 3 installed inside the first magnet body 1 and the second magnet body 2, and an element powder mixture 6 composed of various metal elements at the outer end of the magnetic core 3. The magnetic core 3 includes magnetic sheets 4 and steel sheets 5. The magnetic core 3 is made by adding seven steel sheets 5 to six magnetic sheets 4. Both the first magnet body 1 and the second magnet body 2 have a nickel plating layer 7 on their surface, and the thickness of the nickel plating layer 7 is 0.25 mm. In this embodiment, the outer nickel plating layer 7 effectively prevents the oxidation and corrosion of rare earth materials, improving environmental adaptability and service life.
[0020] Example 2 refer to Figure 2 Example 2 is described below. This embodiment further illustrates Example 1 and includes the following steps. S1. Prepare high-purity rare earth metal element powders, take a specific weight percentage ratio, and put the weighed multiple metal powders into a mixer for thorough and uniform dry mixing to ensure that each element is evenly distributed at the microscopic level and form a homogeneous alloy powder mixture. S2. Prepare a square molding die, fill the mold cavity with the mixed alloy powder, bond it with adhesive or bonding agent, and perform the first molding under high pressure to press it into a dense green blank. S3. The green blank formed by the first molding is sliced according to the design size to obtain magnetic sheet 4. It is assembled by an alternating stacking structure of "six magnetic sheets 4 plus seven steel sheets 5". The specific sequence is: starting with one magnetic sheet 4, the steel sheets 5 and magnetic sheets 4 are stacked alternately to ensure that the total number is six magnetic sheets 4 and seven steel sheets 5, forming a composite "magnetic core 3" preform. S4. Prepare the metal oxide powder for the outer layer, and mix the oxide powder thoroughly to form an outer layer powder mixture. S5. Prepare a molding die for the final product's external dimensions. Precisely embed the magnetic core 3 prepared in the first stage into the center of the die and fix it in place. Fill the die with the mixed outer oxide powder, surrounding the central magnetic core 3. When filling, ensure that the powder is evenly distributed in the upper, lower, left, and right directions of the magnetic core 3. Perform a second bonding or adhesive molding to form a unipolar permanent magnet steel body. S6. Place the cured blank into a high-temperature sintering furnace and perform necessary dimensional finishing on the sintered blank to achieve the precise dimensions and surface finish requirements of the final product. S7. Electroplating nickel is performed on the permanent magnet steel body that has been sintered and finished. The product is placed in an electrolyte containing nickel salt as the cathode. Under the set current, temperature and time parameters, a dense nickel plating layer is uniformly deposited on the surface of the permanent magnet steel body through electrolysis.
[0021] S8. Place the processed permanent magnet steel body in a strong pulse magnetic field magnetization device. During magnetization, the direction of the magnetic field is consistent with or works in tandem with the inherent magnetic domain direction of the embedded magnetic core 3. In step S1, the high-purity rare earth elements mainly include cerium (Ce), praseodymium (Pr), yttrium (Y), neodymium (Nd), nickel (Ni), and iron (Fe). The proportions of the high-purity rare earth elements are 20% cerium, 20% praseodymium, 20% yttrium, 20% neodymium, 10% nickel, and 10% iron. In step S2, the metal elements corresponding to the inner magnetic core 3 are mainly cerium oxide, praseodymium oxide, yttrium oxide, neodymium oxide, nickel oxide, and iron oxide. The steel sheets 5 inside the magnetic core 3 are all 45 high-carbon steel, and the 45 high-carbon steel sheets 5 inside the magnetic core 3 are 1 / 5 the thickness of the magnetic sheet 4. The unipolar permanent magnet steel body with unipolar magnetic effect produced by the rare earth metal element process and its embedded special structure can be magnetized in any direction, generating mutual repulsion of the same polarity and can be superimposed and suspended.
[0022] In this embodiment, the complex internal structure and external shape are formed in one step by the process of "two moldings and one sintering", avoiding the complex assembly in the future. Some oxide powder is used as the outer layer material, which helps to reduce the amount of expensive rare earth pure metals while ensuring the function. 45 high carbon steel sheet 5 is introduced into the magnetic core 3. With its high magnetic permeability and high strength characteristics, it not only enhances the magnetic field guiding effect, but also improves the overall mechanical strength of the magnetic core 3.
[0023] In practical applications, this invention is based on the principles of "magnetic field guidance and shielding" and "magnetic circuit constraint." The core lies in the embedded composite magnetic core 3. After being magnetized, the alternately stacked magnetic sheets 4 and steel sheets 5 form a "magnetic circuit backbone" with a highly consistent internal magnetic field direction and concentrated intensity. The steel sheet 5, as a low magnetic resistance path, efficiently conducts and constrains the magnetic lines of force generated by the magnetic sheet 4 along a specific path. When this magnetic core 3 is wrapped by an outer layer material, due to the magnetic properties of the outer layer material and the overall structural design, the magnetic lines of force are forced to leak out in large quantities from one end of the magnetic core 3 to a certain surface. The leakage of magnetic lines of force at the other end is greatly suppressed or "short-circuited" by the opposite magnetic field of the outer layer material and the structure of the magnetic core 3, thereby achieving the unipolarization of the overall external magnetic field. This makes a single magnetic steel body a macroscopic "magnetic monopole" simulation body. When two such magnetic steel bodies face each other with the same pole, their strong magnetic field regions repel each other. Since the magnetic field on the other side is extremely weak, it will not form an effective attraction loop. Therefore, a stable and pure repulsive force can be generated, thereby achieving levitation and superposition.
[0024] In the description of this invention, it should be noted that the terms "top," "bottom," "one side," "the other side," "front," "rear," "middle part," "inner," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0025] Finally, it should be noted that the above descriptions 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 monolithic surface unipolar magnet, characterized in that, It includes a first magnet body (1), a second magnet body (2) is provided on one side of the first magnet body (1), a magnetic core (3) is installed inside the first magnet body (1) and the second magnet body (2), and an element powder mixture (6) composed of various metal elements is provided at the outer end of the magnetic core (3).
2. The integral surface unipolar magnet body according to claim 1, characterized in that, The magnetic core (3) includes magnetic sheets (4) and steel sheets (5), and the magnetic core (3) is made by adding seven steel sheets (5) to six magnetic sheets (4).
3. The integral surface unipolar magnet body according to claim 1, characterized in that, Both the first magnet body (1) and the second magnet body (2) are provided with a nickel plating layer (7) with a thickness of 0.25 mm.
4. The manufacturing process for an integral surface unipolar magnet body according to claim 1, characterized in that, Includes the following steps S1. Prepare high-purity rare earth metal element powders, take a specific weight percentage ratio, and put the weighed multiple metal powders into a mixer for thorough and uniform dry mixing to ensure that each element is evenly distributed at the microscopic level and form a homogeneous alloy powder mixture. S2. Prepare a square molding die, fill the mold cavity with the mixed alloy powder, bond it with adhesive or bonding agent, and perform the first molding under high pressure to press it into a dense green blank. S3. The green blank formed by the first molding is sliced according to the design size to obtain magnetic sheets (4). The magnetic sheets (4) are assembled by alternating stacking structure of "six magnetic sheets (4) plus seven steel sheets (5)". The specific order is: starting with one magnetic sheet (4), the steel sheets (5) and magnetic sheets (4) are stacked alternately to ensure that the total number is six magnetic sheets (4) and seven steel sheets (5) to form a composite "magnetic core (3)" preform. S4. Prepare the metal oxide powder for the outer layer, and mix the oxide powder thoroughly to form an outer layer powder mixture. S5. Prepare a molding die for the final product's external dimensions. Precisely embed the magnetic core (3) prepared in the first stage into the center of the mold and fix it in place. Fill the mold with the mixed outer oxide powder and surround the central magnetic core (3). When filling, ensure that the powder is evenly distributed in the upper, lower, left, and right directions of the magnetic core (3). Perform a second bonding or adhesive molding to form a unipolar permanent magnet steel body. S6. Place the cured blank into a high-temperature sintering furnace and perform necessary dimensional finishing on the sintered blank to achieve the precise dimensions and surface finish requirements of the final product. S7. Electroplating nickel is performed on the permanent magnet steel body that has been sintered and finished. The product is placed in an electrolyte containing nickel salt as the cathode. Under the set current, temperature and time parameters, a dense nickel plating layer is uniformly deposited on the surface of the permanent magnet steel body through electrolysis. 5.S8. Place the processed permanent magnet steel body in a strong pulse magnetic field magnetization device. During magnetization, the direction of the magnetic field is consistent with or works in tandem with the inherent magnetic domain direction of the embedded magnetic core (3).
6. The manufacturing process for an integral surface unipolar magnet body according to claim 1, characterized in that, The high-purity rare earth elements in step S1 mainly include cerium (Ce), praseodymium (Pr), yttrium (Y), neodymium (Nd), nickel (Ni), and iron (Fe), with the proportions of high-purity rare earth elements being 20% cerium, 20% praseodymium, 20% yttrium, 20% neodymium, 10% nickel, and 10% iron.
7. The manufacturing process for an integral surface unipolar magnet body according to claim 1, characterized in that, The components in step S2 that correspond to the metal elements of the inner magnetic core (3) are mainly: cerium oxide, praseodymium oxide, yttrium oxide, neodymium oxide, nickel oxide and iron oxide.
8. The manufacturing process for an integral surface unipolar magnet body according to claim 1, characterized in that, The steel sheets (5) and steel sheets (5) inside the magnetic core (3) are both 45 high carbon steel, and the 45 high carbon steel sheets (5) inside the magnetic core (3) are all 1 / 5 the thickness of the magnetic sheet (4).
9. The manufacturing process for an integral surface unipolar magnet body according to claim 1, characterized in that, The rare earth metal element process and its embedded special structure are used to process and produce a unipolar permanent magnet steel body with unipolar magnetic effect. The magnetization direction is not limited, and like poles can repel each other and can be superimposed and suspended.