| 摘要 |
PROBLEM TO BE SOLVED: To obtain a method of manufacturing an armature core for dynamo-electric machine capable of enhancing the material yield, when punching a core piece group arranged in two straight rows in zigzag pattern, from a strip while inclining the arrangement direction of core pieces against the width direction of the strip.SOLUTION: Core blocks 30 constituted of a rectangular shape in contact with the outermost periphery of a core piece group arrange in zigzag are arranged so that a corner A located on one diagonal is located between holes P adjacent in the rolling direction of a strip 25, and the angle &thetas; formed by the center line of a magnetic pole tooth 17b and the rolling direction of a strip is in a range of 0°<&thetas;<&thetas;2(where, &thetas;2 is an angle when the material yield is equal to that at the time of 0°), while ensuring a distance d punchable from both ends of the strip 25 and the hole P. |
