US 2003/0200646 A1 · Manufacturing method for a spindle motor rotor hub

Abstract

The method for manufacturing a spindle motor rotor hub of the present invention where a disk-shaped bulk is shaped by cutting a specified thickness of a round bar material, such as metal, perpendicular to the axial line thereof. This disk-shaped bulk is then cold forged and formed into a machining workpiece, which has approximately the shape of the rotor hub. The two ends of the machining workpiece are ground to form parallel upper and lower machining reference surfaces. The peripheral surface of the machining workpiece is then ground to form a peripheral machining reference surface. Finishing is accomplished by cutting and grinding each part of the rotor hub based on the aforementioned upper and lower machining reference surfaces and on the peripheral machining reference surface.

Claims9

Dependent claims

A method for manufacturing a rotor hub comprising the steps of:

obtaining a disk of specified thickness;
cold forging said disk into a workpiece having a plurality of surfaces including a top surface, a bottom surface, and a peripheral surface;
grinding said top surface to form a top machining reference surface and grinding said bottom surface to form a bottom machining reference surface such that said machining reference surfaces are parallel;
grinding said peripheral surface of the workpiece to form a peripheral machining reference surface;
and
using said top, bottom, and peripheral machining reference surfaces to cut and to grind the workpiece into a rotor hub.

3 more elements

Dependencies are inferred from the claim text.

Manufacturing method for a spindle motor rotor hub

Life of this patent

Manufacturing method for a spindle motor rotor hub

Life of this patent

Abstract

Claims9