CN107546026A - A kind of sintering method for improving magnetic core mechanical strength - Google Patents
A kind of sintering method for improving magnetic core mechanical strength Download PDFInfo
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- CN107546026A CN107546026A CN201710602864.4A CN201710602864A CN107546026A CN 107546026 A CN107546026 A CN 107546026A CN 201710602864 A CN201710602864 A CN 201710602864A CN 107546026 A CN107546026 A CN 107546026A
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- magnetic core
- mechanical strength
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- green compact
- sintering method
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Abstract
The invention discloses a kind of sintering method for improving magnetic core mechanical strength, magnetic core green compact outline includes length sides, width edge and thickness edges, when the length sides are more than or equal to the width edge and the thickness edges, during sintering the width edge of the magnetic core green compact is carried out into contact with refractory material with the plane residing for the thickness edges is sintered.The sintering method disclosed in this invention for improving magnetic core mechanical strength, overcome those skilled in the art's original technology understanding, after being sintered for magnetic core reason is found the problem of insufficient strength, the posture of magnetic core green compact when changing sintering, the contact area of magnetic core green compact and refractory material is reduced, area and position that magnetic core green compact chemically react in sintering process is reduced, ensures that the main weight-bearing surface of magnetic core does not contact with refractory material, avoid it from chemically reacting, avoid influenceing its mechanical strength.By sintering method disclosed in this invention, the mechanical strength of magnetic core can be greatly enhanced, ensure the quality of magnetic core.
Description
Technical field
The present invention relates to materials processing technology field, and in particular to a kind of sintering side for improving MnZn magnetic core mechanical strength
Method.
Background technology
Soft magnetic manganese-zinc ferrite refers to a kind of sintering magnetic being made up of iron oxide, mangano-manganic oxide, zinc oxide mix
Ferrite, according to the different demands of client, make magnetic core of different shapes., it is necessary to which magnetic core is given birth in the manufacturing process of magnetic core
Base is placed in kiln and is sintered, and makes it have the various electrical characteristics and mechanical strength for meeting industrial requirement.It is being driven
Sintering process in, for ensure sintering steady progress, generally the maximum surface of magnetic core is placed on refractory material to magnetic core
Green compact are sintered, as shown in figure 1, in order to ensure sintering safety, generally magnetic core green compact largest face is placed on refractory material,
But the M of magnetic core is unable to reach preferable level to mechanical strength after sintering, cause the magnetic core finished product after sintering can not meet to use
Demand.
The content of the invention
To solve problems of the prior art, the invention provides a kind of sintering side for improving magnetic core mechanical strength
Method.
The purpose of the present invention implements by the following technical programs：
A kind of sintering method for improving magnetic core mechanical strength, magnetic core green compact outline include length sides, width edge and thickness
Side, when the length sides are more than or equal to the width edge and the thickness edges, the magnetic core is given birth to during sintering
The width edge of base carries out contact with refractory material with the plane residing for the thickness edges and is sintered.
Further, three times of the length edge lengths more than or equal to the thickness edge lengths.
Further, the magnetic core green compact are flat E shapes.
Further, the magnetic core green density is 2.9-3.1g/cm3.
Further, the magnetic core green compact are carried out with being sintered in nitrogen protection kiln for the refractory material.
Further, the sintering temperature of the magnetic core green compact and the refractory material is 1300-1400 DEG C.
Further, after the magnetic core green sintering cutting and grinding to finished size.
The beneficial effects of the invention are as follows：
The sintering method disclosed in this invention for improving magnetic core mechanical strength, overcomes the original skill of those skilled in the art
Art recognizes, and finds reason after being sintered for magnetic core the problem of insufficient strength, the posture of magnetic core green compact when changing sintering, reduces magnetic core
The contact area of green compact and refractory material, area and position that magnetic core green compact chemically react in sintering process are reduced, is protected
The main weight-bearing surface of card magnetic core does not contact with refractory material, avoids it from chemically reacting, avoids influenceing its mechanical strength.Pass through
Sintering method disclosed in this invention, the mechanical strength of magnetic core can be greatly enhanced, ensure the quality of magnetic core.
Brief description of the drawings
Fig. 1 is position view of the magnetic core green compact in sintering process in the prior art；
Fig. 2 is magnetic core green compact front view in the novel sintered method disclosed in this invention for improving magnetic core mechanical strength；
Fig. 3 is magnetic core green compact profile in the novel sintered method disclosed in this invention for improving magnetic core mechanical strength；
Fig. 4 is magnetic core green compact in the novel sintered method of raising magnetic core mechanical strength disclosed in this invention in sintering process
In position view；
Fig. 5 is to strong using magnetic core M made from the novel sintered method of raising magnetic core mechanical strength disclosed in this invention
Spend test schematic diagram.
Embodiment
With reference to specific embodiment, specific embodiments of the present invention is described in detail.
As in Figure 2-4, the invention discloses a kind of sintering method for improving magnetic core mechanical strength, magnetic core green compact 1 are flat
Flat-shaped E shapes, outline include length sides A, width edge C and thickness edges B, when the length sides A be more than or equal to the width edge C with
And during the thickness edges B, by residing for the width edge C of the magnetic core green compact 1 and the thickness edges B during sintering
Plane carries out contact with refractory material 2 and is sintered.
This method is further detailed below by specific embodiment：
The EE5013 magnetic cores green compact 1 of batch production, according to green density 3.00-3.05g/cm3Magnetic core green compact 1 are pressed into,
Wherein, the length of magnetic core green compact 1 becomes the thickness edges B that A is more than or equal to three times, nitrogen protection kiln is chosen, by the width of magnetic core green compact 1
The plane that degree side C and thickness edges B is formed is placed on refractory material 2, is sintered according to Fig. 4 sintering method, is burnt
1350 DEG C of junction temperature, product sintering are come out of the stove, and finished size is ground to after cutting, and it is strong to test M directions machinery according to method shown in Fig. 5
Degree, data are as follows：
| Sintering method | M is to average mechanical strength |
| Fig. 1 conventional methods are sintered rear magnetic core | 9.5Kgf |
| Fig. 4 the inventive method is sintered rear magnetic core | 15.8Kgf |
From test data it can be found that the inventive method, M improve about 60% to mechanical strength, use reliability is significantly
Improve.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in the present invention's
Within protection domain.
Claims (7)
- A kind of 1. sintering method for improving magnetic core mechanical strength, it is characterised in that：Magnetic core green compact outline includes length sides, width Side and thickness edges, when the length sides are more than or equal to the width edge and the thickness edges, by institute during sintering The width edge for stating magnetic core green compact carries out contact with refractory material with the plane residing for the thickness edges and is sintered.
- A kind of 2. sintering method for improving magnetic core mechanical strength according to claim 1, it is characterised in that：The length sides Length is more than or equal to three times of the thickness edge lengths.
- A kind of 3. sintering method for improving magnetic core mechanical strength according to claim 1, it is characterised in that：The magnetic core life Base is flat E shapes.
- A kind of 4. sintering method for improving magnetic core mechanical strength according to claim 1, it is characterised in that：The magnetic core life Base density is 2.9-3.1g/cm3。
- A kind of 5. sintering method for improving magnetic core mechanical strength according to claim 1, it is characterised in that：The magnetic core life Base is carried out with being sintered in nitrogen protection kiln for the refractory material.
- A kind of 6. sintering method for improving magnetic core mechanical strength according to claim 1, it is characterised in that：The magnetic core life The sintering temperature of base and the refractory material is 1300-1400 DEG C.
- A kind of 7. sintering method for improving magnetic core mechanical strength according to claim 1, it is characterised in that：The magnetic core life Cutting and grinding is to finished size after base sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710602864.4A CN107546026A (en) | 2017-07-21 | 2017-07-21 | A kind of sintering method for improving magnetic core mechanical strength |
Applications Claiming Priority (1)
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| CN201710602864.4A CN107546026A (en) | 2017-07-21 | 2017-07-21 | A kind of sintering method for improving magnetic core mechanical strength |
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| CN107546026A true CN107546026A (en) | 2018-01-05 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491759A (en) * | 2011-11-24 | 2012-06-13 | 江苏省晶石磁性材料与器件工程技术研究有限公司 | Superimposition sintering technology of manganese zinc ferrite |
| CN202332570U (en) * | 2011-11-28 | 2012-07-11 | 无锡斯贝尔磁性材料有限公司 | Dipping plate for magnetic core adhesive |
| CN102615703A (en) * | 2011-01-27 | 2012-08-01 | 上海康顺磁性元件厂有限公司 | E-shaped magnetic core die moulded without baseplate and provided with inclined surface |
| CN205723099U (en) * | 2016-06-13 | 2016-11-23 | 泰州茂翔电子器材有限公司 | A kind of plane core structure |
-
2017
- 2017-07-21 CN CN201710602864.4A patent/CN107546026A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102615703A (en) * | 2011-01-27 | 2012-08-01 | 上海康顺磁性元件厂有限公司 | E-shaped magnetic core die moulded without baseplate and provided with inclined surface |
| CN102491759A (en) * | 2011-11-24 | 2012-06-13 | 江苏省晶石磁性材料与器件工程技术研究有限公司 | Superimposition sintering technology of manganese zinc ferrite |
| CN202332570U (en) * | 2011-11-28 | 2012-07-11 | 无锡斯贝尔磁性材料有限公司 | Dipping plate for magnetic core adhesive |
| CN205723099U (en) * | 2016-06-13 | 2016-11-23 | 泰州茂翔电子器材有限公司 | A kind of plane core structure |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180105 |
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| RJ01 | Rejection of invention patent application after publication |