To make a hub and a yoke so as to have sufficient strength and accuracy as one body.
A first intermediate body 51 of a concave cone, on which a thickened part 511 having larger diameter than the hub is generated is made on the circumference of the hole 11 by pressurizing the center part of a disk-like steel sheet 1 while pressing the outer peripheral end. Next, a predetermined part 521 of the hub is formed by contracting the diameter by ironing the center part including the thickened part 511 and extending the height, further, the predetermined part 522 of a bottom wall is formed by pressurizing the outer peripheral side and a second intermediate body 52 thickening the side of the predetermined part 521 of the hub is made. By arranging the inner periphery of the predetermined part 521 of the hub by pressurizing and compressing the upper end after ironing the outer periphery, the hub is formed. Meanwhile, the bottom wall is formed by pressurizing the predetermined part 522 of the bottom wall and a third intermediate body on which the predetermined part of the sidewall on the outer periphery is made, is formed. After that, the integral rotor for the power generators is completed by performing the drawing and ironing of the predetermined part of the sidewall at the same time while holding the shape of the hub.
HIYAMA YOSHIKI
TANABE KENTARO
TOMOBE TAKAKIMI
KAGAWA MANABU
MURAOKA HIDETO
SOGA RYUJI
SHINKAWA YASUHIRO
HONDA MOTOR CO LTD
| JP2000262010A | 2000-09-22 | |||
| JPH08331814A | 1996-12-13 |