| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for rotor laminated iron core, capable of correcting a rotor laminated iron core which is made by outline-blinking a rotor iron core in which the small teeth piece parts are formed at the outer periphery by means of press processing, caulking and laminating according to a relatively simple method so that extraction sag, a plane, a shear plane, and a fracture plane of an edge surface of small teeth piece ports of the respective rotor iron core pieces become substantially vertical, and attaining superior magnetic characteristics. SOLUTION: In this manufacturing method for rotor laminated iron core 16 made by outline-blinking the rotor iron core piece 11, in which the small teeth piece parts 12 are formed at the outer periphery from a metallic plate by means of press processing, caulking and laminating the plurality of rotor iron core pieces 11, a coining punch 18, which is divided into several pieces in a circumferential direction to be formed at a punching edge surface of the small teeth piece parts 12 of the rotor iron core piece 11 of which the outline is blanked from the metallic plate to be laminated is pressed on the inner side in the radial direction to perform coining, thus correcting the punching edge surface that is substantially vertical to the plate surface of the rotor iron core piece 11. COPYRIGHT: (C)2007,JPO&INPIT
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