METHOD OF FABRICATING SHAFT FROM METAL PLATE

摘要

A shaft is integrally fabricated from an arbitrary portion of a metal plate, the axis of which is perpendicular to the metal plate. The method comprises a first step of extruding the metal plate (1) forward by press working, and a second step of subjecting a projecting portion, which is formed by the first step, to rearward extrusion with a punch inserted forcibly thereinto so as to expand it longitudinally. A shaft with a sufficient height is fabricated with a high precision.