CN111933440A - Method for manufacturing ferrite magnetic core for high-frequency transformer - Google Patents
Method for manufacturing ferrite magnetic core for high-frequency transformer Download PDFInfo
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- CN111933440A CN111933440A CN202010737390.6A CN202010737390A CN111933440A CN 111933440 A CN111933440 A CN 111933440A CN 202010737390 A CN202010737390 A CN 202010737390A CN 111933440 A CN111933440 A CN 111933440A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/342—Oxides
- H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Magnetic Ceramics (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention discloses a method for manufacturing a ferrite core for a high-frequency transformer, which comprises the following steps: the method comprises the following steps: weighing and mixing the raw materials, wherein the weighing process comprises the following steps: weighing FeO, ZnO, MnO, NiO, MgO, ZrO, VO, YO, BO, TiO, SiO, sintering aid and dispersant in corresponding weight, and putting the raw materials into a mixer for mixing; step two: granulating, namely granulating the raw materials before pre-sintering, introducing the mixed raw materials into a granulator, adding water into the granulator for wet grinding, drying and crushing; step three: pre-sintering, namely pre-sintering the granulated raw materials; step four: and (3) ball milling, namely putting the pre-sintered material into a ball mill, and crushing the pre-sintered material by the ball mill. The method can effectively improve the strength of the ferrite core, and the ferrite core produced by the method has smaller loss in the transportation process.
Description
Technical Field
The invention belongs to the field of ferrite core manufacturing, and particularly relates to a method for manufacturing a ferrite core for a high-frequency transformer.
Background
The ferrite magnetic core is a high-frequency magnetic conductive material, mainly used as a high-frequency transformer (such as a switching power supply, a line output transformer and the like), a high-frequency magnetic ring (for interference resistance) and the like, increases the magnetic permeability and improves the inductance quality factor, the ferrite magnetic ring is used in the transformer, has a plurality of specifications and sizes, can be selected according to different materials of the magnetic ring, can be simply wound by using different coatings and improves the breakdown voltage, and the ferrite magnetic core needs to be manufactured by using a ferrite magnetic core manufacturing method during production.
The existing ferrite core manufacturing method has the defects that the manufactured ferrite core has low strength and cannot meet the use requirements of users, and the manufactured ferrite core is easy to wear in the transportation process, so that the ferrite core manufacturing method for the high-frequency transformer is provided.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to solve the problems that the strength of the manufactured ferrite core is not high enough to meet the use requirements of users and the manufactured ferrite core is easy to wear in the transportation process in the existing ferrite core manufacturing method, and the method for manufacturing the ferrite core for the high-frequency transformer is provided.
The invention solves the technical problems through the following technical scheme, and the invention comprises the following steps:
the method comprises the following steps: weighing and mixing the raw materials, wherein the weighing process comprises the following steps: weighing FeO, ZnO, MnO, NiO, MgO, ZrO, VO, YO, BO, TiO, SiO, sintering aid and dispersant in corresponding weight, and putting the raw materials into a mixer for mixing;
step two: granulating, namely granulating the raw materials before pre-sintering, introducing the mixed raw materials into a granulator, adding water into the granulator for wet grinding, drying and crushing;
step three: pre-sintering, namely pre-sintering the granulated raw materials;
step four: ball milling, namely putting the pre-sintered material into a ball mill, and crushing the pre-sintered material by the ball mill;
step five: introducing the crushed raw materials subjected to ball milling into sintering equipment for sintering and forming, heating the raw materials subjected to ball milling under the protection of inert gas, preserving heat, and continuing to heat until the ferrite core is formed;
step six: and grinding and polishing the molding raw material by using a grinding machine and a polishing machine, magnetically cutting the molded ferrite into corresponding shapes by using a cutting machine, drilling preset holes in the molding raw material by using a punching machine, and processing to obtain the ferrite core for the high-frequency transformer.
Preferably, the time for wet grinding in the second step is 1.5h-3.5 h.
Preferably, the temperature rise process in the fifth step is as follows: heating from room temperature to 420-460 deg.C at a speed of 1-6 deg.C/min, maintaining for 25-35 min, heating to 750-1000 deg.C at a speed of 3-12 deg.C/min, and cooling to room temperature.
Preferably, the raw material percentage in the step one comprises: the raw materials comprise, by weight, 16-18% of ZnO, 22-24% of MnO, 3-12% of NiO, 4-12% of MgO, 1-3% of ZrO, 10-12% of VO, 4-11% of YO, 4-8% of BO, 0.1-0.4% of TiO, 1-2% of SiO, 0.11-0.18% of sintering aid, 0.25-0.55% of dispersant and the balance FeO.
Preferably, the dispersant comprises dipropylene glycol and polyoxyethylene ether.
The utility model provides a ferrite core, includes first magnetic core body and second magnetic core body, the upper and lower both ends surface of first magnetic core body all is provided with first plectrum, the upper and lower both ends surface of second magnetic core body all is provided with the second plectrum, first magnetic core body surface is provided with first partition subassembly, second magnetic core body surface is provided with the second partition subassembly.
The first separating component comprises a first preset groove and a first top column, and the second separating component comprises a second preset groove and a second top column.
Preferably, the first preset groove is formed in the outer surface of one side of the first magnetic core body, the first support pillar is formed in the outer surface of the other side of the first magnetic core body, the second preset groove is formed in the outer surface of one side of the second magnetic core body, and the second support pillar is formed in the outer surface of the other side of the second magnetic core body;
preferably, one end of the second top column is inserted into the first preset groove.
Preferably, the outer surfaces of the first shifting piece and the second shifting piece are both provided with anti-slip grooves.
Compared with the prior art, the invention has the following advantages: according to the method for manufacturing the ferrite core for the high-frequency transformer, the strength of the ferrite core manufactured by the method is effectively improved through pre-sintering, so that the service life of the ferrite core is prolonged, the mutual friction of the ferrite core manufactured by the method in the transportation process is reduced, the condition that the ferrite core is damaged due to mutual friction and collision of the ferrite core in the transportation process is effectively avoided, and the yield of the ferrite core is further improved.
Drawings
FIG. 1 is an overall structural view of a ferrite core of the present invention;
FIG. 2 is a structural view of the ferrite magnetic connecting device of the present invention.
In the figure: 1. a first magnetic core body; 2. a second magnetic core body; 3. a first plectrum; 4. a second plectrum; 5. a first preset groove; 6. a first top pillar; 7. a second top pillar; a second pre-set groove.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
The invention includes the following examples: the first embodiment is as follows: a method for manufacturing a ferrite core for a high-frequency transformer comprises the following steps:
the method comprises the following steps: weighing and mixing the raw materials, wherein the weighing process comprises the following steps: weighing the following raw materials in percentage: 17% of ZnO, 23% of MnO, 5% of NiO, 6% of MgO, ZrO 2%, 11% of VO, 6% of YO, 4-8% of BO, 0.2% of TiO2%, 0.16% of SiO 2%, 0.3% of sintering aid, 0.3% of dispersing agent and the balance of FeO, and putting the raw materials into a mixer for raw material mixing;
step two: granulating, namely granulating the raw materials before pre-sintering, introducing the mixed raw materials into a granulator, adding water into the granulator for wet grinding, drying and crushing;
step three: pre-sintering, namely pre-sintering the granulated raw materials;
step four: ball milling, namely putting the pre-sintered material into a ball mill, and crushing the pre-sintered material by the ball mill;
step five: introducing the crushed raw materials subjected to ball milling into sintering equipment for sintering and forming, heating the raw materials subjected to ball milling under the protection of inert gas, preserving heat, and continuing to heat until the ferrite core is formed;
step six: and grinding and polishing the molding raw material by using a grinding machine and a polishing machine, magnetically cutting the molded ferrite into corresponding shapes by using a cutting machine, drilling preset holes in the molding raw material by using a punching machine, and processing to obtain the ferrite core for the high-frequency transformer.
The wet milling time in the second step is 1.5h-3.5 h.
The temperature rise process in the fifth step is as follows: heating from room temperature to 420-460 deg.C at a speed of 1-6 deg.C/min, maintaining for 25-35 min, heating to 750-1000 deg.C at a speed of 3-12 deg.C/min, and cooling to room temperature.
The dispersant comprises dipropylene glycol and polyoxyethylene ether.
Example two: a method for manufacturing a ferrite core for a high-frequency transformer comprises the following steps:
the method comprises the following steps: weighing and mixing the raw materials, wherein the weighing process comprises the following steps: weighing the following raw materials in percentage: 16% of ZnO, 22% of MnO, 3% of NiO, 4% of MgO, 1% of ZrO, 10% of VO, 4% of YO, 4% of BO, 0.1% of TiO, 1% of SiO, 0.11% of sintering aid, 0.25% of dispersing agent and the balance of FeO, and the raw materials are put into a mixer for raw material mixing;
step two: granulating, namely granulating the raw materials before pre-sintering, introducing the mixed raw materials into a granulator, adding water into the granulator for wet grinding, drying and crushing;
step three: pre-sintering, namely pre-sintering the granulated raw materials;
step four: ball milling, namely putting the pre-sintered material into a ball mill, and crushing the pre-sintered material by the ball mill;
step five: introducing the crushed raw materials subjected to ball milling into sintering equipment for sintering and forming, heating the raw materials subjected to ball milling under the protection of inert gas, preserving heat, and continuing to heat until the ferrite core is formed;
step six: and grinding and polishing the molding raw material by using a grinding machine and a polishing machine, magnetically cutting the molded ferrite into corresponding shapes by using a cutting machine, drilling preset holes in the molding raw material by using a punching machine, and processing to obtain the ferrite core for the high-frequency transformer.
The wet milling time in the second step is 1.5h-3.5 h.
The temperature rise process in the fifth step is as follows: heating from room temperature to 420-460 deg.C at a speed of 1-6 deg.C/min, maintaining for 25-35 min, heating to 750-1000 deg.C at a speed of 3-12 deg.C/min, and cooling to room temperature.
The dispersant comprises dipropylene glycol and polyoxyethylene ether.
Example three: a method for manufacturing a ferrite core for a high-frequency transformer comprises the following steps:
the method comprises the following steps: weighing and mixing the raw materials, wherein the weighing process comprises the following steps: weighing the following raw materials in percentage: 18% of ZnO, 22-24% of MnO, 12% of NiO, 12% of MgO, 3% of ZrO, 12% of VO, 11% of YO, 8% of BO, 0.4% of TiO0, 2% of SiO, 0.18% of sintering aid, 0.55% of dispersing agent and the balance of FeO, and the raw materials are put into a mixer for raw material mixing;
step two: granulating, namely granulating the raw materials before pre-sintering, introducing the mixed raw materials into a granulator, adding water into the granulator for wet grinding, drying and crushing;
step three: pre-sintering, namely pre-sintering the granulated raw materials;
step four: ball milling, namely putting the pre-sintered material into a ball mill, and crushing the pre-sintered material by the ball mill;
step five: introducing the crushed raw materials subjected to ball milling into sintering equipment for sintering and forming, heating the raw materials subjected to ball milling under the protection of inert gas, preserving heat, and continuing to heat until the ferrite core is formed;
step six: and grinding and polishing the molding raw material by using a grinding machine and a polishing machine, magnetically cutting the molded ferrite into corresponding shapes by using a cutting machine, drilling preset holes in the molding raw material by using a punching machine, and processing to obtain the ferrite core for the high-frequency transformer.
The wet milling time in the second step is 1.5h-3.5 h.
The temperature rise process in the fifth step is as follows: heating from room temperature to 420-460 deg.C at a speed of 1-6 deg.C/min, maintaining for 25-35 min, heating to 750-1000 deg.C at a speed of 3-12 deg.C/min, and cooling to room temperature.
The dispersant comprises dipropylene glycol and polyoxyethylene ether.
As shown in fig. 1-2: the utility model provides a ferrite core, including first magnetic core 1 and second magnetic core 2, the upper and lower both ends surface of first magnetic core 1 all is provided with first plectrum 3, the upper and lower both ends surface of second magnetic core 2 all is provided with second plectrum 4, 1 surface of first magnetic core is provided with first partition assembly, 2 surfaces of second magnetic core are provided with second partition assembly, first partition assembly is used for separating first magnetic core 1 and second magnetic core 2 with second partition assembly, can prevent the excessive damage of ferrite core friction that mutual friction leads to between first magnetic core 1 and the second magnetic core 2.
The first separating component comprises a first preset groove 5 and a first jack-prop 6, the second separating component comprises a second preset groove 7 and a second jack-prop, the first preset groove 5 is arranged on the outer surface of one side of the first magnetic core body 1, the first jack-prop 6 is arranged on the outer surface of the other side of the first magnetic core body 1, the second preset groove 7 is arranged on the outer surface of one side of the second magnetic core body 2, the second jack-prop 8 is arranged on the outer surface of the other side of the second magnetic core body 2, one end of the second jack-prop 8 is inserted in the first preset groove 5, the second jack-prop 8 is the same as the first jack-prop 6 in length, the first preset groove 5 is the same as the second preset groove 7 in depth, the first jack-prop 6 is 0.2cm longer than the first preset groove 5 in length, the second jack-prop 8 is 0.2cm longer than the second preset groove 7 in length, anti-skid grooves are formed in the outer surfaces of the first shifting piece 3 and the second shifting piece 4, and the effect of protection is achieved.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method for manufacturing a ferrite core for a high-frequency transformer is characterized by comprising the following steps:
the method comprises the following steps: weighing and mixing the raw materials, wherein the weighing process comprises the following steps: weighing FeO, ZnO, MnO, NiO, MgO, ZrO, VO, YO, BO, TiO, SiO, sintering aid and dispersant in corresponding weight, and putting the raw materials into a mixer for mixing;
step two: granulating, namely granulating the raw materials before pre-sintering, introducing the mixed raw materials into a granulator, adding water into the granulator for wet grinding, drying and crushing;
step three: pre-sintering, namely pre-sintering the granulated raw materials;
step four: ball milling, namely putting the pre-sintered material into a ball mill, and crushing the pre-sintered material by the ball mill;
step five: introducing the crushed raw materials subjected to ball milling into sintering equipment for sintering and forming, heating the raw materials subjected to ball milling under the protection of inert gas, preserving heat, and continuing to heat until the ferrite core is formed;
step six: and grinding and polishing the molding raw material by using a grinding machine and a polishing machine, magnetically cutting the molded ferrite into corresponding shapes by using a cutting machine, drilling preset holes in the molding raw material by using a punching machine, and processing to obtain the ferrite core for the high-frequency transformer.
2. The method for manufacturing a ferrite core for a high frequency transformer as claimed in claim 1, wherein: and the wet milling time in the step two is 1.5h-3.5 h.
3. The method for manufacturing a ferrite core for a high frequency transformer as claimed in claim 1, wherein: the temperature rise process in the fifth step is as follows: heating from room temperature to 420-460 deg.C at a speed of 1-6 deg.C/min, maintaining for 25-35 min, heating to 750-1000 deg.C at a speed of 3-12 deg.C/min, and cooling to room temperature.
4. The method for manufacturing a ferrite core for a high frequency transformer as claimed in claim 1, wherein: the raw materials in the first step comprise: the raw materials comprise, by weight, 16-18% of ZnO, 22-24% of MnO, 3-12% of NiO, 4-12% of MgO, 1-3% of ZrO, 10-12% of VO, 4-11% of YO, 4-8% of BO, 0.1-0.4% of TiO, 1-2% of SiO, 0.11-0.18% of sintering aid, 0.25-0.55% of dispersant and the balance FeO.
5. The method for manufacturing a ferrite core for a high frequency transformer as claimed in claim 4, wherein: the dispersing agent comprises dipropylene glycol and polyoxyethylene ether.
6. A ferrite core manufactured by the ferrite core manufacturing method according to claims 1 to 5, characterized in that: including first magnetic core body (1) and second magnetic core body (2), the upper and lower both ends surface of first magnetic core body (1) all is provided with first plectrum (3), both ends surface all is provided with second plectrum (4) about second magnetic core body (2), first magnetic core body (1) surface is provided with first partition assembly, second magnetic core body (2) surface is provided with the second partition assembly.
7. The ferrite core manufactured by the ferrite core manufacturing method according to claim 6, wherein: the first separation component comprises a first preset groove (5) and a first top column (6), and the second separation component comprises a second preset groove (7) and a second top column.
8. The method for manufacturing a ferrite core for a high-frequency transformer as claimed in claim 7, wherein: the first groove (5) of predetermineeing is seted up at one side surface of first magnetic core body (1), first fore-set (6) set up the opposite side surface at first magnetic core body (1), the second is predetermine groove (7) and is seted up at one side surface of second magnetic core body (2), second fore-set (8) set up the opposite side surface at second magnetic core body (2).
9. The method for manufacturing a ferrite core for a high-frequency transformer as claimed in claim 7, wherein: one end of the second top column (8) is inserted into the first preset groove (5).
10. The method for manufacturing a ferrite core for a high frequency transformer as claimed in claim 6, wherein: anti-skidding grooves are formed in the outer surfaces of the first shifting piece (3) and the second shifting piece (4).
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| CN202010737390.6A CN111933440A (en) | 2020-07-28 | 2020-07-28 | Method for manufacturing ferrite magnetic core for high-frequency transformer |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108558384A (en) * | 2018-04-26 | 2018-09-21 | 湖北华磁电子科技有限公司 | Soft magnetic ferrite and magnetic core preparation method and application are lost in ultra low power |
| CN109326406A (en) * | 2018-11-14 | 2019-02-12 | 岳西县鸿腾电子有限公司 | A kind of switching mode power supply transformer inductance FERRITE CORE and preparation method thereof |
| CN210245273U (en) * | 2019-10-15 | 2020-04-03 | 国众电子(深圳)有限公司 | Subminiature integrated patch network transformer |
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2020
- 2020-07-28 CN CN202010737390.6A patent/CN111933440A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108558384A (en) * | 2018-04-26 | 2018-09-21 | 湖北华磁电子科技有限公司 | Soft magnetic ferrite and magnetic core preparation method and application are lost in ultra low power |
| CN109326406A (en) * | 2018-11-14 | 2019-02-12 | 岳西县鸿腾电子有限公司 | A kind of switching mode power supply transformer inductance FERRITE CORE and preparation method thereof |
| CN210245273U (en) * | 2019-10-15 | 2020-04-03 | 国众电子(深圳)有限公司 | Subminiature integrated patch network transformer |
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