Verfahren zur Herstellung einer schwingungsdämpfenden Buchse

摘要

A method of producing a vibration-isolating bushing with which it is possible to secure a larger area of the edge surface of an inner cylinder than in the prior art method. In upsetting one extremity (18a) of the inner cylinder (12) by cold plastic working, after a rubber elastomer (16) is secured to the outer circumference of the inner cylinder by vulcanization molding, as a jig for pressing onto the edge surface of the inner cylinder, an upsetting jig (30) whose top surface (32) is flat is used and the top surface (32) of the jig (30) is pressed onto the edge surface (20a) of the inner cylinder (12) while causing the jig to gyrate on a conical orbit centering the axis (x0) of the inner cylinder (12), whereby the outside diameter only of the extremity (18a) is enlarged while suppressing the enlarging of the inside diameter.