CN112927909A - Preparation method of magnetic core of open-type mutual inductor and shaping external mold structure applied by same - Google Patents
Preparation method of magnetic core of open-type mutual inductor and shaping external mold structure applied by same Download PDFInfo
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- CN112927909A CN112927909A CN202110102647.5A CN202110102647A CN112927909A CN 112927909 A CN112927909 A CN 112927909A CN 202110102647 A CN202110102647 A CN 202110102647A CN 112927909 A CN112927909 A CN 112927909A
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- magnetic core
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- base block
- core base
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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
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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
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention provides a preparation method of a magnetic core of an open-type mutual inductor, which comprises the following steps: s1, carrying out heat treatment on the prepared magnetic core base block; s2, performing paint dipping treatment on the magnetic core base block obtained by the heat treatment; s3, baking and curing the magnetic core base block obtained by the paint dipping treatment; s4, cutting the magnetic core base block obtained by baking and curing to obtain two semi-annular mutual inductor magnetic core blocks; in the baking process of step S3, the core substrate obtained by the paint dipping process is subjected to a molding process, where the molding process includes: continuously applying molding pressure in the radial direction inwards to the outer periphery side of the magnetic core base block; through the arrangement of the preparation method of the magnetic core of the open-type mutual inductor, based on the molding application of the magnetic core of the mutual inductor, the end surface of the magnetic core can be ensured to be smooth, so that the open-type mutual inductor prepared by the preparation method has the beneficial effect of stable assembly.
Description
Technical Field
The invention relates to the technical field of processing and manufacturing of transformers, in particular to a preparation method of a magnetic core of an open-type transformer and a shaping external mold structure applied by the same.
Background
The former open-type mutual inductor magnetic core is manufactured in an internal mold shaping mode, the outer circle size of the magnetic core cannot be effectively guaranteed in the manufacturing mode, the problem of end face cracks of the magnetic core cannot be solved (as shown in figure 5), the magnetic core is difficult to match with a protective box or other jigs in subsequent assembly, and the material characteristics of the open-type mutual inductor are affected.
Disclosure of Invention
The invention aims to provide a preparation method of a magnetic core of an open-type mutual inductor and a shaping external mold structure applied by the same, aiming at overcoming the defects of the prior art.
The preparation method of the magnetic core of the open-type mutual inductor comprises the following steps:
s1, carrying out heat treatment on the prepared magnetic core base block;
s2, performing paint dipping treatment on the magnetic core base block obtained by the heat treatment;
s3, baking and curing the magnetic core base block obtained by the paint dipping treatment;
s4, cutting the magnetic core base block obtained by baking and curing to obtain two semi-annular mutual inductor magnetic core blocks;
in the baking process of step S3, the core substrate obtained by the paint dipping process is subjected to a molding process, where the molding process includes: and continuously applying molding pressure in the radial direction inwards to the outer periphery side of the magnetic core base block.
Further, in step S3, the molding process includes the following steps:
s3-1, clamping the outer periphery of the magnetic core base block obtained by the dip coating treatment by a shaping external mold, and enabling the clamping side of the shaping external mold to form shape matching with the outer periphery of the magnetic core base block;
s3-2, connecting the shaping outer die with an elastic piece, and applying uniform shaping pressure to the outer periphery of the magnetic core base block by the clamping side of the shaping outer die under the elastic force of the elastic piece;
s3-3, baking and solidifying the magnetic core base block of the sizing external mold.
Further, in step S4, the cutting process includes the following steps:
s4-1, cutting marks are carried out on the magnetic core base block after baking and curing treatment, and the cutting marks are located at the clamping joint end position of the shaping outer die;
and S4-2, taking out the magnetic core base block and carrying out cutting treatment corresponding to the cutting mark.
Further, when the molding outer die is used for clamping, a release agent is coated between the clamping side of the molding outer die and the magnetic core base block.
Further, the magnetic core base block is annular as a whole, and the molding treatment process comprises the following steps: an inner die matched with the inner ring side of the magnetic core base block in shape is arranged at the position of the inner ring side of the magnetic core base block; the pressure range of the molding pressure is 5-10N.
The shaping outer die structure applied to the preparation method of the magnetic core of the open-type mutual inductor comprises at least two clamping pieces, wherein each clamping piece is connected with an elastic piece, a clamping space is formed by each clamping piece in a surrounding mode, and the elastic pieces are linked with the clamping pieces to be close to each other so that the clamping space has a narrowing trend.
Furthermore, the clamping piece block comprises a first clamping piece and a second clamping piece which are arranged on two sides, the first clamping piece and the second clamping piece are arranged in a semi-annular shape, and the clamping space is formed between the first clamping piece and the second clamping piece in a reliable connection mode; under the action of the elastic force of the elastic piece, the first clamping piece and the second clamping piece are mutually close to each other to clamp.
Further, the elastic piece comprises a plurality of springs, the outer periphery sides of the first clamping piece and/or the second clamping piece are/is provided with connecting pieces in an attaching mode, and the springs are connected to the connecting pieces and form a surrounding arrangement for the outer periphery sides of the first clamping piece and the second clamping piece; the outer peripheries of the first clamping piece and the second clamping piece are provided with a tendency of mutually approaching and clamping due to the reset elasticity of the spring.
Further, the first clamping piece outer periphery side is provided with a first positioning groove, the second clamping piece outer periphery side is provided with a second positioning groove, and the first positioning groove and the second positioning groove are in abutting fit to form an attaching groove for spring positioning attachment.
Furthermore, a screw hole is formed in the outer peripheral side of the first clamping piece or the second clamping piece in the radial direction in an extending mode, the connecting piece comprises a bolt, the bolt is in threaded connection with the screw hole, the number of the springs is one, one end of each spring is positioned and connected to one side, away from the screw hole, of the bolt, and each spring surrounds the outer peripheral sides of the first clamping piece and the second clamping piece and enables the other end of each spring to be positioned and connected to the other side, away from the screw hole, of the bolt.
The invention has the beneficial effects that:
through the arrangement of the preparation method of the magnetic core of the open-type mutual inductor, based on the molding application of the magnetic core of the mutual inductor, the end surface of the magnetic core can be ensured to be smooth, so that the open-type mutual inductor prepared by the preparation method has the beneficial effect of stable assembly.
Drawings
FIG. 1 is a schematic structural view of a sizing external mold structure of the present invention;
FIG. 2 is a first assembled schematic view of the inventive modular overmold structure;
FIG. 3 is a second assembled schematic view of the inventive modular overmold structure;
FIG. 4 is a schematic perspective view of a sizing die structure of the present invention;
FIG. 5 illustrates a prior art magnetic core end face crack problem;
fig. 6 shows the end surface condition of the magnetic core manufactured by the method for manufacturing a magnetic core according to the present invention.
Description of reference numerals:
the clamping device comprises a first clamping piece 1, a first positioning groove 11, a second clamping piece 2, a second positioning groove 21, a spring 3, a screw hole 4, a bolt 5, a clamping side 61, a clamping joint end 62 and a clamping space 7.
Detailed Description
In order to make the technical solution, the purpose and the advantages of the present invention more apparent, the present invention will be further explained with reference to the accompanying drawings and embodiments.
As shown in fig. 1 to 4, the method for preparing a magnetic core of an open-type transformer of the present invention includes the following steps:
s1, selecting a proper magnetic core material, and winding to obtain a circular magnetic core base block;
s2, carrying out heat treatment on the prepared magnetic core base block;
s3, performing paint dipping treatment on the magnetic core base block obtained by the heat treatment;
s4, baking and curing the magnetic core base block obtained by the dip coating treatment, and performing molding treatment on the magnetic core base block in the baking treatment process;
and S5, cutting the magnetic core base block obtained by the molding and baking curing treatment to obtain two semi-annular mutual inductor magnetic core blocks.
The molding treatment process comprises the following steps:
(1) an inner die matched with the inner ring side of the magnetic core base block in shape is arranged at the position of the inner ring side of the magnetic core base block, and the inner die can be selected to be applied to a cylindrical module; so that the inner ring side of the magnetic core base block and the cylindrical module form a close contact fit.
(2) And uniformly and continuously applying radially inward molding pressure to the outer periphery of the magnetic core base block by using a certain molding outer die, wherein the pressure range of the molding pressure is 5-10N.
The setting application of the shaping external mold is as follows: the magnetic core clamping device comprises at least two clamping pieces, wherein each clamping piece is encircled to form a ring shape, and a clamping side 61 of each clamping piece is combined to encircle a circular clamping space 7 for placing the magnetic core base block; each clamping piece block is connected with an elastic piece, and under the action of the elastic force of the elastic piece, the clamping piece blocks have mutually close clamping matching actions to form a tendency of narrowing the clamping space 7; when the shaping outer die stably clamps the magnetic core base block, the inner ring side surface of each clamping piece is tightly attached and contacted with the outer peripheral side surface of the magnetic core base block.
The outer periphery of each clamping piece block can be connected and extended with a connecting piece, the elastic piece can be applied to a spring 3, so that the spring 3 is provided with a plurality of sections, the tail ends of the plurality of sections of springs 3 are connected to the connecting pieces to form a ring shape, and under the action of the reset elastic force of each spring 3, the clamping pieces have corresponding tendency of approaching each other.
In the actual production process, or due to the problems of cost control and processing precision, transition or not enough flatness exists between the clamping sides 61 of the clamping blocks, the enclosing combination is difficult to arrange in a perfect circle shape, so the combination of the clamping blocks and the spring 3 with more quantity or the shape deformation of the clamping space 7 in the clamping blocks is easily caused; as a preferred embodiment, in the sizing external mold, the clamping piece block is applied as two pieces, namely a first clamping piece 1 and a second clamping piece 2 which are symmetrically arranged at two opposite sides; the first clamping piece 1 and the second clamping piece 2 are arranged in a semi-annular shape, and the clamping space 7 is formed between the opposite sides of the first clamping piece 1 and the second clamping piece 2.
The outer periphery of the first clamping piece 1 is provided with a first positioning groove 11, the outer periphery of the second clamping piece 2 is provided with a second positioning groove 21, and the first positioning groove 11 and the second positioning groove 21 are in abutting fit to form an attaching groove for positioning and attaching the spring 3.
The connecting member can be selectively applied as a bolt 5, such that a screw hole 4 is formed in the outer peripheral side of the first clamping member 1 at the central position thereof and extends in the radial direction thereof, and the bolt 5 is screwed into the screw hole 4 to form a fixing.
The spring 3 is applied as a strip, the head end of the spring 3 is positioned and connected to one side of the bolt 5 away from the position of the screw hole 4, the spring 3 is arranged around the outer peripheral sides of the first and second clip members 1 and 2 under the limitation of the attaching groove, and the tail end of the spring 3 is positioned and connected to the other side of the bolt 5 away from the position of the screw hole 4.
The molding outer die on the outer peripheral side is matched with the inner die on the inner ring side, so that the magnetic core base block in the baking and curing process can be continuously stressed, and the molding requirement of the magnetic core base block can be met. After the molding treatment, as shown in fig. 6, the end surface cracks of the magnetic core can be effectively subjected to the matching treatment, and the production application requirements of the high-quality magnetic core can be met.
When the shaping external mold is used for clamping, a release agent can be coated between the clamping side 61 of the shaping external mold and the magnetic core base block so as to facilitate the subsequent demolding treatment of the magnetic core base block.
Due to the structural form of the shaping outer die or the process problems, the connection transition positions of the first clamping piece 1 and the second clamping piece 2 are not smooth, and the clamping joint ends 62 of the magnetic core base block with the shaped magnetic core at the connection transition positions on the two sides are deformed to a certain degree.
Cutting marks corresponding to the clamping joint ends 62 at the two ends can be made in the cutting treatment process of the molded magnetic core base block; and the cutting mark is used for half-open cutting treatment, so that the deformed parts of the clamping joint ends 62 at two sides are treated along with the cutting loss, thereby obtaining two standard half-ring-shaped transformer magnetic core blocks, and meeting the subsequent assembly application requirements of the open-type transformer.
The above description is only a preferred embodiment of the present invention, and those skilled in the art may still modify the described embodiment without departing from the implementation principle of the present invention, and the corresponding modifications should also be regarded as the protection scope of the present invention.
Claims (10)
1. The preparation method of the magnetic core of the open-type mutual inductor is characterized by comprising the following steps of:
s1, carrying out heat treatment on the prepared magnetic core base block;
s2, performing paint dipping treatment on the magnetic core base block obtained by the heat treatment;
s3, baking and curing the magnetic core base block obtained by the paint dipping treatment;
s4, cutting the magnetic core base block obtained by baking and curing to obtain two semi-annular mutual inductor magnetic core blocks;
in the baking process of step S3, the core substrate obtained by the paint dipping process is subjected to a molding process, where the molding process includes: and continuously applying molding pressure in the radial direction inwards to the outer periphery side of the magnetic core base block.
2. The method for manufacturing a magnetic core according to claim 1, wherein in step S3, the molding process comprises the steps of:
s3-1, clamping the outer periphery of the magnetic core base block obtained by the dip coating treatment by a shaping external mold, and enabling the clamping side of the shaping external mold to form shape matching with the outer periphery of the magnetic core base block;
s3-2, connecting the shaping outer die with an elastic piece, and applying uniform shaping pressure to the outer periphery of the magnetic core base block by the clamping side of the shaping outer die under the elastic force of the elastic piece;
s3-3, baking and solidifying the magnetic core base block of the sizing external mold.
3. The method for manufacturing a magnetic core according to claim 2, wherein in step S4, the cutting process includes the steps of:
s4-1, cutting marks are carried out on the magnetic core base block after baking and curing treatment, and the cutting marks are located at the clamping joint end position of the shaping outer die;
and S4-2, taking out the magnetic core base block and carrying out cutting treatment corresponding to the cutting mark.
4. The method for producing a magnetic core according to claim 2, wherein a release agent is applied between the holding side of the sizing external mold and the magnetic core base when the sizing external mold is used for holding.
5. The method for producing a magnetic core according to any one of claims 1 to 4, wherein the core base is formed in an overall ring shape, and the molding process includes: an inner die matched with the inner ring side of the magnetic core base block in shape is arranged at the position of the inner ring side of the magnetic core base block; the pressure range of the molding pressure is 5-10N.
6. The sizing external mold structure applied to the magnetic core preparation method of any one of claims 1 to 5, characterized by comprising at least two clamping pieces, wherein each clamping piece is connected with an elastic piece, each clamping piece encloses a clamping space, and the elastic piece links the clamping pieces to approach each other so that the clamping space has a tendency of narrowing.
7. The sizing die structure according to claim 6, wherein the clamping pieces comprise a first clamping piece and a second clamping piece which are arranged at two sides, the first clamping piece and the second clamping piece are arranged in a semi-ring shape, and the clamping space is formed between the first clamping piece and the second clamping piece in a reliable connection manner; under the action of the elastic force of the elastic piece, the first clamping piece and the second clamping piece are mutually close to each other to clamp.
8. The modular overmold structure of claim 7, wherein the spring members comprise springs, and wherein the outer perimeter sides of the first and/or second clip members are attached with connectors to which the springs are attached and form a circumferential arrangement around the outer perimeter sides of the first and second clip members; the outer peripheries of the first clamping piece and the second clamping piece are provided with a tendency of mutually approaching and clamping due to the reset elasticity of the spring.
9. The modular overmold structure of claim 8, wherein the first clip outer perimeter side is provided with a first detent and the second clip outer perimeter side is provided with a second detent, the first detent and second detent abutting engagement forming an attachment slot for spring positioning attachment.
10. The modular outer mold structure according to claim 8, wherein the outer periphery of the first clamping member or the second clamping member is provided with a screw hole extending radially inward, the connecting member comprises a bolt, the bolt is in threaded connection with the screw hole, the spring is provided as a bar, one end of the spring is positioned and connected to one side of the bolt far away from the screw hole, and the spring is arranged around the outer periphery of the first clamping member and the second clamping member and has the other end positioned and connected to the other side of the bolt far away from the screw hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110102647.5A CN112927909B (en) | 2021-01-26 | 2021-01-26 | Preparation method of magnetic core of open-type mutual inductor and shaping external mold structure applied by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110102647.5A CN112927909B (en) | 2021-01-26 | 2021-01-26 | Preparation method of magnetic core of open-type mutual inductor and shaping external mold structure applied by same |
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| Publication Number | Publication Date |
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| CN112927909A true CN112927909A (en) | 2021-06-08 |
| CN112927909B CN112927909B (en) | 2022-06-21 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101572182A (en) * | 2009-02-27 | 2009-11-04 | 国电环境保护研究院 | Ultracrystalline transformer core manufacturing method and special mould therefor |
| KR20160061109A (en) * | 2014-11-21 | 2016-05-31 | (주)창성 | A manufacturing method of a magnetic core and an inductor with an embedded coil by molding process under a room temperature condition and a magnetic core and a molded inductor manufactured thereby. |
| CN109983552A (en) * | 2016-10-27 | 2019-07-05 | 阿莫善斯有限公司 | Manufacturing method for the core of current transformer and the core |
| CN110246678A (en) * | 2019-07-23 | 2019-09-17 | 北流市柯顺电子有限公司 | A kind of amorphous, nanocrystalline magnet core annealing fixture |
| CN112117116A (en) * | 2020-10-12 | 2020-12-22 | 深圳市新核瑞科技有限公司 | Method for manufacturing iron-based or nickel-based annular magnetic core |
-
2021
- 2021-01-26 CN CN202110102647.5A patent/CN112927909B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101572182A (en) * | 2009-02-27 | 2009-11-04 | 国电环境保护研究院 | Ultracrystalline transformer core manufacturing method and special mould therefor |
| KR20160061109A (en) * | 2014-11-21 | 2016-05-31 | (주)창성 | A manufacturing method of a magnetic core and an inductor with an embedded coil by molding process under a room temperature condition and a magnetic core and a molded inductor manufactured thereby. |
| CN109983552A (en) * | 2016-10-27 | 2019-07-05 | 阿莫善斯有限公司 | Manufacturing method for the core of current transformer and the core |
| CN110246678A (en) * | 2019-07-23 | 2019-09-17 | 北流市柯顺电子有限公司 | A kind of amorphous, nanocrystalline magnet core annealing fixture |
| CN112117116A (en) * | 2020-10-12 | 2020-12-22 | 深圳市新核瑞科技有限公司 | Method for manufacturing iron-based or nickel-based annular magnetic core |
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| Publication number | Publication date |
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| CN112927909B (en) | 2022-06-21 |
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Address after: No.15, Shunjing Avenue, B District, Lishui and GUI Industrial Park, Nanhai District, Foshan City, Guangdong Province Patentee after: Foshan Zhongyan Magnetoelectric Technology Co.,Ltd. Address before: No.15, Shunjing Avenue, B District, Lishui and GUI Industrial Park, Nanhai District, Foshan City, Guangdong Province Patentee before: FOSHAN ZHONGYAN AMORPHOUS TECHNOLOGY Co.,Ltd. |