| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a ring stator having uniform and thin thickness accurately by drawing. Ž<P>SOLUTION: In a method of manufacturing the ring stator 1 of a motor, which is provided with a ring-shaped stator body portion 2 and a mounting flange 3 formed on the opening edge on one side of the stator body portion 2, the drawing is applied to a disk-shaped blank 11 while performing vibrational hammering at slow pressing speed by using a servo press and a cylindrical barrel part 14 is uniformly drawn so as to be thinner than the thickness of the blank. By further applying the drawing to this cylindrical barrel part 14 by using the servo press, the thickness t1 is uniformized. The cylindrical barrel part 14 formed by the drawing is positively thinned than the thickness of the blank. In this way, the cylindrical barrel part where the thickness is uniformed with extremely high accuracy is formed by the drawing. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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