METHOD OF PROCESSING END OF SLEEVE, SLEEVE PROCESSED BY THIS METHOD, METHOD OF PRODUCING ANTI-VIBRATION BUSHING, ANTI-VIBRATION BUSHING, AND PRESSING TOOL

摘要

A method of processing an end of a sleeve comprising the steps of pressing a surface roughening active section (9) provided on a pressing tool (7) against the end surface (8) of one end (21) of a sleeve (1), rotating the pressing tool (7) in such a manner as to describe a conical locus or a substantially conical locus around the axis (O) of the sleeve (1), thereby enlarging and surface-roughening the end surface (8).