发明名称 |
DUST CORE AND METHOD OF MANUFACTURING THEREOF |
摘要 |
There are provided a dust core in which, even if the surface of a heat-treated compact is ground, the insulation between soft magnetic particles on the ground surface can be ensured in the grinding step, and a method for producing the dust core. The method includes a preparation step of preparing a heat-treated compact 100 by compacting soft magnetic particles having an insulation coating and heating the resultant compact to a predetermined temperature; and a machining step of removing part of the heat-treated compact 100 using a working tool 2. The machining step is performed while an electric current is supplied with a conductive fluid 7L between the heat-treated compact 100 serving as an anode and a working tool 2 that machines the heat-treated compact 100 or a first counter electrode 5 that faces the working tool 2 with a distance therebetween, the working tool 2 or the first counter electrode 5 serving as a cathode. A bridge portion that connects soft magnetic particles to each other is removed through the supply of an electric current, the soft magnetic particles being adjacent to each other along a machined surface of the heat-treated compact 100. |
申请公布号 |
EP2562771(A1) |
申请公布日期 |
2013.02.27 |
申请号 |
EP20110783516 |
申请日期 |
2011.05.16 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
UENO, TOMOYUKI;NISHIOKA, TAKAO |
分类号 |
H01F1/24;H01F3/08;H01F27/255;H01F41/02 |
主分类号 |
H01F1/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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