CN105405631A - Production method of mini inductor - Google Patents
Production method of mini inductor Download PDFInfo
- Publication number
- CN105405631A CN105405631A CN201511010817.8A CN201511010817A CN105405631A CN 105405631 A CN105405631 A CN 105405631A CN 201511010817 A CN201511010817 A CN 201511010817A CN 105405631 A CN105405631 A CN 105405631A
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- coil
- manufacture method
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000007731 hot pressing Methods 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 16
- 238000003466 welding Methods 0.000 claims abstract description 14
- 238000005452 bending Methods 0.000 claims abstract description 12
- 238000000465 moulding Methods 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 239000003973 paint Substances 0.000 claims abstract description 5
- 239000000047 product Substances 0.000 claims description 15
- 238000001467 acupuncture Methods 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 5
- 239000006247 magnetic powder Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 210000003298 dental enamel Anatomy 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000011265 semifinished product Substances 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000007723 die pressing method Methods 0.000 abstract 1
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012797 qualification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention discloses a production method of a mini inductor. The production method comprises the following steps of winding, bending, laser paint peeling, laser welding, leg cutting, cold pressing, hot pressing, baking and terminal molding. The production method of the mini inductor has reasonable processing steps and adopts an alpha winding method to wind a coil, a product after cold pressing adopts a hot press, so that die pressing and pressure maintaining treatment can be carried out after the die temperature rises to a certain value; in comparison with the inductor with the same size, the inductor produced by the production process has higher density, lower direct-current resistance and larger saturation current, and furthermore, the percent of pass of product appearance is higher and the product reliability is further improved.
Description
Technical field
The present invention relates to a kind of pay-off, espespecially a kind of manufacture method of carrying the miniature inductance of the metal dust making inductor.
Background technology
The thriving demand in smart mobile phone market, becomes the enormous motivation of small size power inductance market development, its demand from now on for a long time in will be increasing, domestic and international market will be more wide.In addition, simultaneously the produce market such as global LCD TV (LCDTV), liquid crystal display (LCDDisplay), plasm TV (PDP), Set Top Box (STB), hard disk (HDD), computer (PC), camera also continues to increase rapidly, and one-body molded power inductance market is huge.
Along with electronic product is toward the development in small-sized efficient, low-voltage, high-current direction, the development trend of electronic devices and components is inevitable synchronous with it.For power inductance, then require that saturation current Isat and temperature-rise current Irms constantly promotes, D.C. resistance DCR constantly reduces.One-body molded power inductance adopts first coiling, fills the shaping technique of magnetic powder and the high performance power inductance of a produced class subsequently.Compared with common winding power inductance, one-body molded power inductance has the Isat of lower DCR and Geng Gao, and extremely low stray field, has catered to the eager demand of market to small-sized big current power inductance and electromagnetism interference.
At present, on market, small size one inductance adopts " single-ended coiling+spot welding+cold moudling " technique mostly.Adopt this explained hereafter product, coil configuration compactness is poor, easily occurs spot welding insecure or line wound, easily occur that limit is split thus affects qualification rate after baking during spot welding.Meanwhile, in order to reduce the ratio that limit is split, the distance of coil and product edge to be increased in the design, causing the Isat of one inductor product to reduce.
Summary of the invention
The technique that the object of the invention is to the manufacture method overcoming existing miniature inductance is unreasonable, and coil configuration compactness is poor, thus causes the D.C. resistance of inductor excessive, the defect that withstanding current capability reduces.
For solve technical scheme that technical problem proposed by the invention adopts for: the manufacture method described in the manufacture method of miniature inductance of the present invention comprises the steps:
A, adopt α winding method, coiling, i.e. the air core coil of coiling one fixing turn on barred body, coil is divided into upper and lower two-layer coiling respectively;
B, by coil pin bending: adopt Bending Mould, by the squeezing action of mould, by coil pin bending to certain angle;
C, with shadow shield, the main body of coil covered and coil pin is exposed, adopting laser, by the pin stripping paint in coil specific region;
D, adopt shadow shield the main body of coil covered and coil pin exposed, adopt laser, the specific region of coil pin and the solder terminal of electrode slice is integrally welded, formation coil electrode sheet;
E, employing cutting knife, by the unnecessary pin excision beyond coil electrode sheet welding region;
F, employing cold press and cold stamping die, by the coil electrode sheet prepared by operation E, put into the die cavity of cold stamping die, and fill magnetic powder in each acupuncture point, open cold press carries out mold pressing;
G, adopt hot press and hot pressing die, by the semi-finished product after colding pressing, put into the die cavity of hot pressing die, open hot press and carry out mold pressing;
H, employing nitrogen baking box, by the product after hot pressing, under temperature is 130 ~ 200 DEG C of conditions, toast 1 ~ 2 hour;
I, employing terminal forming machine, whole by electrode slice cuts folding to the electrode slice terminal being exposed to body exterior.
Coil in described A operation is flat enamel covered wire.
Barred body in described A operation can be straight rod also can be oval barred body.
Laser in described C operation adopts radium-shine laser.
Laser in described D operation adopts radium-shine laser.
Cold stamping die acupuncture point in described F operation is matrix arrangement, and temperature of colding pressing is normal temperature, and the molding pressure in every square millimeter of every cave is 0.037 ~ 0.047Ton.
Hot pressing die acupuncture point in described G operation is matrix arrangement, and hot pressing temperature scope is 120 DEG C-180 DEG C, and hot pressing time scope is 30-90s, and the molding pressure in every square millimeter of every cave is 0.074 ~ 0.094Ton.
Pass through technique scheme, beneficial effect of the present invention is: the manufacture method processing step of miniature inductance of the present invention is reasonable, adopt α winding method, coiling, product after colding pressing carries out pressing mold and pressurize process after adopting hot press to make mold temperature be elevated to certain value, and the inductance using this processing procedure to make has higher density relative to the inductance of comparable size, lower D.C. resistance and larger saturation current, another product appearance qualification rate is also higher, and product reliability is further enhanced.
Accompanying drawing explanation
Fig. 1 is the perspective view of the inductance that the manufacture method applying miniature inductance of the present invention makes.
Fig. 2 is the loop construction schematic diagram of the manufacture method applying miniature inductance of the present invention.
Fig. 3 is the structural representation after the coil pin bending of the manufacture method applying miniature inductance of the present invention.
Fig. 4 is coil and the electrode slice Welding Structure schematic diagram of the manufacture method of miniature inductance of the present invention.
Fig. 5 is the coil electrode sheet cutting structural representation of the manufacture method of miniature inductance of the present invention.
Fig. 6 is the perspective structure schematic diagram of the hot pressing compression-moulded product of the manufacture method of miniature inductance of the present invention.
Embodiment
Below in conjunction with accompanying drawing, structure of the present invention is described further.
Referring to figs. 1 through Fig. 6, the manufacture method of miniature inductance comprises the steps: A, adopts α winding method, coiling 1, the i.e. air core coil of coiling one fixing turn on barred body, during concrete enforcement, determine winding turns according to the inductance value of inductance and direct current resistance, coil is divided into upper and lower two-layer coiling respectively; In the present embodiment, barred body is straight rod, when specifically implementing, also can be oval barred body.In the present embodiment, adopt flat enamel covered wire, coil configuration is neat, fine and close, and coil winding not easily deformation occurs after completing, and the arrangement of coil is more regular, reduces the D.C. resistance DCR of product.During concrete enforcement, traditional inductance and the parameter experiment data of the inductance utilizing the present invention to make are as following table:
Be of a size of for profile: 2.7*2.2*1.0mm
B, by coil pin bending: adopt Bending Mould, by the squeezing action of mould, by pin 11 bending of coil to certain angle, when specifically implementing, bending angle scope in 30 °-90 °, for the laser welding of rear operation is prepared;
C, with shadow shield, the main body of coil covered and coil pin is exposed, adopting the laser of radium-shine laser or other form, by the pin stripping paint in coil specific region, when shadow shield prevents laser from divesting the paint at pin place, injuring coil main body;
The main body of coil covers and coil pin 11 is exposed by D, employing shadow shield, adopt the laser of radium-shine laser or other form, by the solder terminal integrally welded formation coil electrode sheet of the specific region of coil pin and electrode slice 2, damage coil when shadow shield prevents laser welding.Adopt laser welding to add the fastness of welding, when reducing welding rod spot welding, encounter the risk that coil causes line to be hindered;
E, employing cutting knife, by the unnecessary pin excision beyond coil electrode sheet welding region, colding pressing of rear operation is prepared;
F, employing cold press and cold stamping die, by the coil electrode sheet prepared by operation E, put into the cold stamping die with die cavity, and fill magnetic powder in each acupuncture point, open cold press carries out mold pressing; Cold stamping die acupuncture point is matrix arrangement, and the molding pressure in every square millimeter of every cave is 0.037 ~ 0.047Ton.According to the size of product size during concrete enforcement, and cold stamping die acupuncture point number, molding pressure is as follows:
G, adopt hot press and hot pressing die, by the semi-finished product after colding pressing, put into the hot pressing die with die cavity, open hot press and carry out mold pressing; The molding pressure in every square millimeter of every cave is 0.074 ~ 0.094Ton, when specifically implementing, according to the size of product size, and hot pressing die acupuncture point number, molding pressure is as follows:
H, employing nitrogen baking box, by the product after hot pressing, under temperature is 130 ~ 200 DEG C of conditions, toast 1 ~ 2 hour, the intensity of product will strengthen;
I, adopt terminal forming machine, by electrode slice, to leaking, to cut folding in the electrode slice terminal of body exterior whole, forms the electrode of inductance.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (7)
1. a manufacture method for miniature inductance, is characterized in that: described manufacture method comprises the steps:
A, adopt α winding method, coiling, i.e. the air core coil of coiling one fixing turn on barred body, coil is divided into upper and lower two-layer coiling respectively;
B, by coil pin bending: adopt Bending Mould, by the squeezing action of mould, by coil pin bending to certain angle;
C, with shadow shield, the main body of coil covered and coil pin is exposed, adopting laser, by the pin stripping paint in coil specific region;
D, adopt shadow shield the main body of coil covered and coil pin exposed, adopt laser, the specific region of coil pin and the solder terminal of electrode slice is integrally welded, formation coil electrode sheet;
E, employing cutting knife, by the unnecessary pin excision beyond coil electrode sheet welding region;
F, employing cold press and cold stamping die, by the coil electrode sheet prepared by operation E, put into the die cavity of cold stamping die, and fill magnetic powder in each acupuncture point, open cold press carries out mold pressing;
G, adopt hot press and hot pressing die, by the semi-finished product after colding pressing, put into the die cavity of hot pressing die, open hot press and carry out mold pressing;
H, employing nitrogen baking box, by the product after hot pressing, under temperature is 130 ~ 200 DEG C of conditions, toast 1 ~ 2 hour;
I, employing terminal forming machine, whole by electrode slice cuts folding to the electrode slice terminal being exposed to body exterior.
2. the manufacture method of miniature inductance as claimed in claim 1, is characterized in that: the coil in described A operation is flat enamel covered wire.
3. the manufacture method of miniature inductance as claimed in claim 1, is characterized in that: the barred body in described A operation can be straight rod also can be oval barred body.
4. the manufacture method of miniature inductance as claimed in claim 1, is characterized in that: the laser in described C operation adopts radium-shine laser.
5. the manufacture method of miniature inductance as claimed in claim 1, is characterized in that: the laser in described D operation adopts radium-shine laser.
6. the manufacture method of miniature inductance as claimed in claim 1, is characterized in that: the cold stamping die acupuncture point in described F operation is matrix arrangement, and temperature of colding pressing is normal temperature, and the molding pressure in every square millimeter of every cave is 0.037 ~ 0.047Ton.
7. the manufacture method of miniature inductance as claimed in claim 1, it is characterized in that: the hot pressing die acupuncture point in described G operation is matrix arrangement, hot pressing temperature scope is 120 DEG C-180 DEG C, and hot pressing time scope is 30-90s, and the molding pressure in every square millimeter of every cave is 0.074 ~ 0.094Ton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511010817.8A CN105405631A (en) | 2015-12-30 | 2015-12-30 | Production method of mini inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511010817.8A CN105405631A (en) | 2015-12-30 | 2015-12-30 | Production method of mini inductor |
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| Publication Number | Publication Date |
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| CN105405631A true CN105405631A (en) | 2016-03-16 |
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| CN201511010817.8A Pending CN105405631A (en) | 2015-12-30 | 2015-12-30 | Production method of mini inductor |
Country Status (1)
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| CN (1) | CN105405631A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252039A (en) * | 2016-08-17 | 2016-12-21 | 三积瑞科技（苏州）有限公司 | Plug-in type inductance coil and mold pressing inductance |
| CN108766739A (en) * | 2018-03-28 | 2018-11-06 | 庆邦电子元器件(泗洪)有限公司 | A kind of novel inductor structure and its processing technology |
| CN109166717A (en) * | 2018-09-03 | 2019-01-08 | 横店集团东磁股份有限公司 | Integrated inductance forming method |
| CN110164673A (en) * | 2019-05-07 | 2019-08-23 | 深圳顺络电子股份有限公司 | Metal soft magnetic composite material inductor and manufacturing method thereof |
| CN110718386A (en) * | 2019-10-21 | 2020-01-21 | 通友智能装备(江苏)有限公司 | Manufacturing process of integrally formed inductor |
| CN112542305A (en) * | 2020-06-24 | 2021-03-23 | 华萃微感电子(江苏)有限公司 | Integrated sectional forming micro-inductor manufacturing process |
| CN112768176A (en) * | 2020-12-30 | 2021-05-07 | 庆邦电子元器件(泗洪)有限公司 | Novel precise power inductor and processing technology thereof |
| CN113363069A (en) * | 2021-04-23 | 2021-09-07 | 深圳市信维通信股份有限公司 | Inductor preparation method |
| CN113593890A (en) * | 2021-07-30 | 2021-11-02 | 横店集团东磁股份有限公司 | Preparation method of spot welding coil and inductor |
| CN114023548A (en) * | 2021-11-01 | 2022-02-08 | 横店集团东磁股份有限公司 | Inductive magnetic element manufacturing method and inductive magnetic element |
| CN115245993A (en) * | 2021-04-25 | 2022-10-28 | 昆山玛冀电子有限公司 | Coil lead cutting machine and cutting method |
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| JPH0562848A (en) * | 1991-08-30 | 1993-03-12 | Tokin Corp | Manufacture of choke coil |
| CN1619723A (en) * | 2003-11-10 | 2005-05-25 | 东光株式会社 | Surface mounted sensor |
| CN101783226A (en) * | 2009-01-21 | 2010-07-21 | 深圳感通科技有限公司 | SMD power inductor and manufacturing method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252039A (en) * | 2016-08-17 | 2016-12-21 | 三积瑞科技（苏州）有限公司 | Plug-in type inductance coil and mold pressing inductance |
| CN108766739A (en) * | 2018-03-28 | 2018-11-06 | 庆邦电子元器件(泗洪)有限公司 | A kind of novel inductor structure and its processing technology |
| CN109166717A (en) * | 2018-09-03 | 2019-01-08 | 横店集团东磁股份有限公司 | Integrated inductance forming method |
| CN109166717B (en) * | 2018-09-03 | 2020-03-20 | 横店集团东磁股份有限公司 | Integrally-formed inductor forming method |
| US11685980B2 (en) | 2019-05-07 | 2023-06-27 | Shenzhen Sunlord Electronics Co., Ltd. | Metal soft magnetic composite material inductor and preparation method thereof |
| CN110164673A (en) * | 2019-05-07 | 2019-08-23 | 深圳顺络电子股份有限公司 | Metal soft magnetic composite material inductor and manufacturing method thereof |
| CN110718386A (en) * | 2019-10-21 | 2020-01-21 | 通友智能装备(江苏)有限公司 | Manufacturing process of integrally formed inductor |
| CN112542305A (en) * | 2020-06-24 | 2021-03-23 | 华萃微感电子(江苏)有限公司 | Integrated sectional forming micro-inductor manufacturing process |
| CN112768176A (en) * | 2020-12-30 | 2021-05-07 | 庆邦电子元器件(泗洪)有限公司 | Novel precise power inductor and processing technology thereof |
| CN113363069A (en) * | 2021-04-23 | 2021-09-07 | 深圳市信维通信股份有限公司 | Inductor preparation method |
| CN113363069B (en) * | 2021-04-23 | 2023-01-17 | 深圳市信维通信股份有限公司 | Inductor preparation method |
| CN115245993A (en) * | 2021-04-25 | 2022-10-28 | 昆山玛冀电子有限公司 | Coil lead cutting machine and cutting method |
| CN113593890A (en) * | 2021-07-30 | 2021-11-02 | 横店集团东磁股份有限公司 | Preparation method of spot welding coil and inductor |
| CN114023548A (en) * | 2021-11-01 | 2022-02-08 | 横店集团东磁股份有限公司 | Inductive magnetic element manufacturing method and inductive magnetic element |
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Application publication date: 20160316 |
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