CN103331443A - Processing method capable for reducing defective rate of deflecting magnetic core - Google Patents
Processing method capable for reducing defective rate of deflecting magnetic core Download PDFInfo
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- CN103331443A CN103331443A CN2013102230179A CN201310223017A CN103331443A CN 103331443 A CN103331443 A CN 103331443A CN 2013102230179 A CN2013102230179 A CN 2013102230179A CN 201310223017 A CN201310223017 A CN 201310223017A CN 103331443 A CN103331443 A CN 103331443A
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Abstract
A processing method capable for reducing the defective rate of a deflecting magnetic core comprises the following steps: a, selecting a male die blank of a stamping die for the deflecting magnetic core; b, adjusting the processing size of the male die of the stamping die, and then processing the male die, wherein the conventional size of a rear aperture of the male die of the die in the x-axis direction is enlarged by 50-60 dmm according to different product models, low speed wire-cutting process is adopted for processing the male die to make the male die to be an oval cross section structure, with taking the x-axis direction where a pair of separation ribs are positioned as a major shaft; c, manufacturing the male die obtained in the step b into the deflecting magnetic core in a conventional press process; and d, adopting a conventional sintering process for sintering forming. The method is simple and practical, can reserve the excess shrinkage in the x-axis direction in advance after the completion of the sintering through adjusting the processing size of the male die of the stamping die, solves the problem of high defective rate caused by sintering deformation, allows the defective rate to be around 2 percent, and reduces the manufacturing cost by 25 percent.
Description
Technical field
The present invention relates to a kind of processing method of deflecting core, especially a kind of processing method that reduces deflecting core processing defect rate.
Background technology
In the prior art, as shown in Figure 1 to Figure 3, the deflecting core product of tapered nested structure, adopt powder metallurgical technique to make, be pressed into type just with mould earlier, sinter molding again, there is about 1.2% shrinkage factor in product behind the sintering, the product curved surface separates muscle corresponding to this separating tank 11 at the pair of separated groove 11(of X-direction mould, and product finally is separated into two monomers and uses) become the weakness of whole revolving body, X-direction area of weakness shrinkage factor is better than the Y direction shrinkage factor, cause revolving body to be out of shape slightly, become ellipse, Y direction has more the 50-56 silk than X-direction size, and this change in size causes common process production that the defect rate of 20-30% is arranged.But the technical scheme that needs a kind of reduction in the numbers of seconds in the production.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of processing method that reduces deflecting core processing defect rate, and reduction in the numbers of seconds reduces production costs greatly.
A kind of processing method that reduces deflecting core processing defect rate comprises the steps: a, chooses the mould base of deflecting core pressing mold punch; Process punch after the processing dimension of b, adjustment pressing mold punch: according to the different product model, stock size to mould punch metapore X-direction strengthens the 50-56 silk, the utilization silk thread cutting technique processing punch of being careful is that major axis is processed into oval-shaped cross-sectional structure with the X-direction at pair of separated muscle place; C, the punch that uses step b to make are made deflecting core with conventional pressing process; D, normal sintering technology sinter molding.
Its principle is: before sintering, adjusted size by the mould punch, the excessive amount of contraction of X-direction (direction at the pair of separated groove place of deflecting core) is reserved, compacting is just during type, product is to become oval slightly, and its X-direction has more the 50-56 silk than Y direction size, treat the product sinter molding after, because X-direction area of weakness shrinkage factor is better than the Y direction shrinkage factor, the size of the 50-56 silk that mould separation muscle place X-direction enlarges has in advance just in time remedied the deflection behind the sintering.Product behind the sintering just in time is positive circle, and defect rate is about 2% only, reduces production costs more than 25%.
The inventive method is simple and practical, by adjusting the processing dimension of pressing mold punch, reserves the excessive amount of contraction of X-direction behind the sintering in advance, has solved sintering warpage and has caused the high problem of product defect rate, and its defect rate is about 2% only, reduces production costs more than 25%.
Description of drawings
Fig. 1 is front view (broken section) structural representation of deflecting core.
Fig. 2 is Fig. 1 plan structure (half-twist) schematic diagram.
Fig. 3 is that Fig. 1 looks up structure (half-twist) schematic diagram.
Fig. 4 is the processing step block diagram of a kind of specific embodiment of the present invention.
The specific embodiment
Embodiment 1: as shown in Figures 1 to 4, an embodiment of the present invention comprises the steps: a, chooses the mould base of deflecting core pressing mold punch; Process punch after the processing dimension of b, adjustment pressing mold punch: according to the different product model, stock size to mould punch metapore X-direction strengthens the 50-56 silk, the utilization silk thread cutting technique processing punch of being careful is that major axis is processed into oval-shaped cross-sectional structure with the X-direction at pair of separated muscle place; C, the punch that uses step b to make are made deflecting core with conventional pressing process; D, normal sintering technology sinter molding.
Its principle is: before sintering, adjusted size by the mould punch, the excessive amount of contraction of X-direction (direction at the pair of separated groove place of deflecting core) is reserved, compacting is just during type, product is to become oval slightly, and its X-direction has more the 50-56 silk than Y direction size, treat the product sinter molding after, because X-direction area of weakness shrinkage factor is better than the Y direction shrinkage factor, the size of the 50-56 silk that mould separation muscle place X-direction enlarges has in advance just in time remedied the deflection behind the sintering.Product behind the sintering just in time is positive circle, and defect rate is about 2% only, reduces production costs more than 25%.
The present invention is not limited to the concrete steps of above-described embodiment, and other equivalent transformation with class methods all falls within protection scope of the present invention.
Claims (1)
1. the processing method that can reduce deflecting core processing defect rate is characterized in that comprising the steps:
A, choose the mould base of deflecting core pressing mold punch;
Process punch after the processing dimension of b, adjustment pressing mold punch: according to the different product model, stock size to mould punch metapore X-direction strengthens the 50-56 silk, the utilization silk thread cutting technique processing punch of being careful is that major axis is processed into oval-shaped cross-sectional structure with the X-direction at pair of separated muscle place;
C, the punch that uses step b to make are made deflecting core with conventional pressing process;
D, normal sintering technology sinter molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102230179A CN103331443A (en) | 2013-06-06 | 2013-06-06 | Processing method capable for reducing defective rate of deflecting magnetic core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102230179A CN103331443A (en) | 2013-06-06 | 2013-06-06 | Processing method capable for reducing defective rate of deflecting magnetic core |
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| Publication Number | Publication Date |
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| CN103331443A true CN103331443A (en) | 2013-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013102230179A Pending CN103331443A (en) | 2013-06-06 | 2013-06-06 | Processing method capable for reducing defective rate of deflecting magnetic core |
Country Status (1)
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02213402A (en) * | 1989-02-14 | 1990-08-24 | Riken Corp | Manufacture of hollow sintered body |
| CN1794373A (en) * | 2004-12-21 | 2006-06-28 | Tdk株式会社 | Cylindrical sintered magnet, motor and method for producing cylindrical sintered magnet |
-
2013
- 2013-06-06 CN CN2013102230179A patent/CN103331443A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02213402A (en) * | 1989-02-14 | 1990-08-24 | Riken Corp | Manufacture of hollow sintered body |
| CN1794373A (en) * | 2004-12-21 | 2006-06-28 | Tdk株式会社 | Cylindrical sintered magnet, motor and method for producing cylindrical sintered magnet |
Non-Patent Citations (2)
| Title |
|---|
| 梁永林: "显示器用偏转磁芯的技术要求及设计实例", 《磁性材料及器件》, no. 02, 30 April 2003 (2003-04-30) * |
| 辛振平等: "通过成型工序解决彩偏磁芯产品船效应的工艺原理及探讨", 《现代电子技术》, no. 18, 1 June 2006 (2006-06-01) * |
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Application publication date: 20131002 |