| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for manufacturing the stator iron core of a motor which can effectively raise the circularity of the bore of a single core. SOLUTION: This invention relates to the method of manufacturing a stator iron core 2 which is constituted by stamping out single cores 3 along die-cutting line 45 from stator material 4 and stacking these single cores 3. This method of manufacturing the stator iron core 2 includes a process (ST2) of forming a slit 42 on the die-cutting line 45 to the stator material 4 and a process (ST5) of punching the bore of the single core 3 from the stator material 4 after formation of the slit 42. For the slits 42, openings are connected with each other by an unpunched part 43, at the intersection with a straight line drawn from the center of the bore of the single core 3 to a magnetic pole part 35 or in the vicinity of the intersection. COPYRIGHT: (C)2005,JPO&NCIPI
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