| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a highly efficient directional electromagnetic steel sheet spiral core for a rotary machine. SOLUTION: In the manufacturing method of the inner spiral rotary machine core having T-type teeth, a core material is a monodirectional electromagnetic steel sheet, a tooth direction is a monodirectional electromagnetic steel sheet rolling direction, a core yoke is spirally worked, and the side end of a tip T-type part is spirally worked. The belt-like core material having a coupled tip T-type part side end where T-type part side ends of adjacent tips are coupled is spirally worked at the same time of forming the core yoke. The tip T-type part side end is cut and worked after spiral working. COPYRIGHT: (C)2006,JPO&NCIPI
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