HUB MACHINING METHOD FOR SPINDLE MOTOR

Japanese Patent JP3688908

B2

PROBLEM TO BE SOLVED: To provide a machining method to high-precisely machine a part, such as a hub used in a motor, having a small size and weak machine rigidity.
SOLUTION: This method comprises a step wherein a part of a hub is provided with a reference structure part to hold a strength high enough to prevent an influence from being exercised on machining through chucking; a step wherein during machining of one surface side of a hub, a disc holding wall 2 part being a reference part arranged at a part of the reference structure part is nipped on the other surface side of the hub and one surface side is machined based on a reference part serving as a reference point; and a step wherein during machining of the other surface side of the hub, a reference part (a hub inside diameter part 8) arranged at a part of the reference structure part is nipped on the one surface side of the hub, and the other surface side is machined based on the reference part serving as a reference point. Especially, a cover-like cover 1' is arranged at one end of the hub inner diameter part 8 of a blank, and this method is effective to machining of structure wherein a bite is inserted only from one side of the hub inner diameter part 8 to cut the inner side.

Tomohiko Sakurai
Akimasa Suzuki

JP28576998A

August 31, 2005

October 07, 1998

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Minebea Co., Ltd.

B23B5/00; H02K15/02; H02K21/22; H02K29/00; (IPC1-7): B23B5/00

JP61236441A

Kenji Yoshitake
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki
Takahashi
Minoru Tsuji

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