| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of an armature core, capable of ensuring the strength of an armature core, without impairing the characteristics of a motor and firmly holding the teeth and a back yoke, while preventing damage of the teeth without a gap. SOLUTION: The manufacturing method of an armature core is provided with a substantially disc-like back yoke 2034, having a main surface almost perpendicular to a shaft and a plurality of teeth 2036 disposed and fixed around the shaft so as to protrude from one main surface of the back yoke 2034. The manufacturing method is provided with (a) a step of forming the back yoke, having a concave portion 2034h for fixing the teeth, by using laminated steel plates in which thin plates are laminated along the shaft direction, and (b) a step of die-molding the inside of the concave portion for fixing the teeth and the teeth with dust core so that the teeth may protrude therefrom, in a state where the back yoke is fixed in a molding die 2050. COPYRIGHT: (C)2009,JPO&INPIT
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