FIXING SLEEVE AND MANUFACTURING METHOD THEREOF

摘要

Provided is a fixing sleeve making it possible to reduce the surface roughness of the inner circumferential surface of the fixing sleeve by spinning, and a method for manufacturing the fixing sleeve. The spinning is performed by moving rollers, in the axial direction of a cup-shaped tubular body and, at the same time, a burnishing tool (spherical tool) is pressed against the outer circumferential surface of the cup-shaped tubular body after the spinning, and the burnishing tool is moved in the same direction as the rollers. The cup-shaped tubular body is plastically deformed in the axial direction of the cup-shaped tubular body, reduced in wall thickness, and elongated in the axial direction.

主权项

1. A method for manufacturing a fixing sleeve, comprising:
performing a spinning process by fitting a mandrel on an inner circumferential surface of a cup-shaped tubular body which is made of metal and pressing a roller against an outer circumferential surface of the cup-shaped tubular body, thereby elongating the cup-shaped tubular body in an axial direction and reducing a wall thickness of the cup-shaped tubular body; and processing the inner circumferential surface of the cup-shaped tubular body or the inner circumferential surface of the fixing sleeve into a smooth surface.