发明名称 |
Method of manufacturing yoke through multistage-drawing process |
摘要 |
A plate material is drawn to form a first-drawing product in the shape of an elliptically cylindrical container having an elliptical cross section. Then, the first-drawing product is drawn to form a re-drawing product in the shape of a generally circular cylindrical container. Next, the re-drawing product is drawn to form a late-drawing product in the shape of an elliptically cylindrical container having an elliptical cross section in which a major axis and a minor axis of the elliptical cross section are reversed with respect to a major axis and a minor axis of the elliptical cross section of the first-drawing product. Thereafter, the late-drawing product is drawn to form a final product as a yoke.
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申请公布号 |
US2002047423(A1) |
申请公布日期 |
2002.04.25 |
申请号 |
US20010946563 |
申请日期 |
2001.09.06 |
申请人 |
NAKAMURA KOUICHI;KANNO KAZUNOBU;MUROI SHINSUKE;KURIBAYASHI TSUYOSHI;SHIMODA TAKETO |
发明人 |
NAKAMURA KOUICHI;KANNO KAZUNOBU;MUROI SHINSUKE;KURIBAYASHI TSUYOSHI;SHIMODA TAKETO |
分类号 |
B21D22/28;B21D22/21;B21D51/18;H02K15/03;H02K15/14;(IPC1-7):H02K21/26 |
主分类号 |
B21D22/28 |
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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