METHOD OF MANUFACTURING DISK DRIVE UNIT

摘要

A method manufactures a disk drive unit that includes a rotor to rotate a disk set thereon, and a fixed body to rotatably support the rotor via a lubricant, by cutting the rotor integrally including a sleeve surrounding a shaft of the fixed body and a hub on which the disk is set, by a wavy cutting process to form a dynamic pressure generating groove to generate a dynamic pressure in the lubricant and having wavy undulations at a bottom part thereof, and cutting a surface of the rotor opposing a ring-shaped member that is included in the fixed body and covers a gas-liquid interface of the lubricant provided between the rotor and the fixed body, by a wavy cutting process to form an air flow generating groove to generate an air flow between the rotor and the ring-shaped member and having wavy undulations at a bottom part thereof.

主权项

1. A method of manufacturing a disk drive unit that includes a rotor configured to rotate a disk set thereon, and a fixed body configured to rotatably support the rotor via a lubricant, the method comprising:
first cutting the rotor which integrally includes a sleeve part surrounding a shaft part of the fixed body and a hub part on which the disk is set, by a wavy cutting process to form a dynamic pressure generating groove configured to generate a dynamic pressure in the lubricant and having wavy undulations at a bottom part thereof; second cutting a surface of the rotor opposing a ring-shaped member that is included in the fixed body and covers a gas-liquid interface of the lubricant provided between the rotor and the fixed body, by a wavy cutting process to form a first air flow generating groove configured to generate an air flow between the rotor and the ring-shaped member and having wavy undulations at a bottom part thereof; and third cutting a surface of the hub part opposing the fixed body, by a wavy cutting process to form a second air flow generating groove configured to generate an air flow between the rotor and the fixed body and having wavy undulations at a bottom part thereof.