| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laminated core which is not deformed and can maintain predetermined dimensions, by preventing large diameter annular core pieces from being held while swelling, and to provide a manufacturing method therefor. <P>SOLUTION: In a laminated core 18 formed by stacking, in a mold, a plurality of annular core pieces 10 obtained by punching a sheet bar material with a punch and a die, recesses 12, 13 are formed previously in the annular core pieces 10. The laminated core 18 includes a plurality of linear recesses 19, 20 in the periphery thereof, and the width w2 of the linear recesses 19, 20 on the radial inside is larger than the width w1 on the radial outside thereof. <P>COPYRIGHT: (C)2013,JPO&INPIT |
