Patent ID: 6591650
Filing Date: 2003-07-15
Classification: B21D,Y10T

Abstract:
A high-pressure bulge-forming apparatus for a tubular workpiece having oppositely open ends, the apparatus comprising:a multipart die forming a cavity adapted to receive the tubular workpiece and having cavity ends oppositely open along an axis; respective actuators aligned with the cavity ends and having stems extending axially toward the cavity; respective heads wholly engageable in the cavity ends and each having an end part with an inwardly tapered outer surface fittable inside the respective workpiece end and a base part fixed to the respective stem, guided in the respective cavity end, and carrying the respective end part, each of the heads being formed adjacent the respective tapered outer surface with a shoulder engageable axially with the respective workpiece end, one of the stems and the respective head being formed with a passage opening axially into the workpiece end engaged by the respective head; and fasteners releasable securing the heads on the stems.