Abstract: A high-pressure bulge-forming apparatus has a multipart die having a cavity adapted to receive a hollow workpiece and having ends oppositely open along an axis. Respective actuators aligned with the cavity ends have stems extending axially toward the cavity. Respective heads on the ends are engageable in the cavity with ends of the workpiece. One of the stems and the respective head is formed with a passage opening axially into the workpiece engaged by the respective head. Fasteners releasable secure the heads on the stems. Each head comprises an end part with an inwardly tapered outer surface and a base part fixed to the respective stem and carrying the respective head. In addition each head has a normally annular mounting plate between the respective base part and end part.

Abstract: A high-pressure bulge-forming apparatus has a multipart die having a cavity adapted to receive a hollow workpiece and having ends oppositely open along an axis. Respective actuators aligned with the cavity ends have stems extending axially toward the cavity. Respective heads on the ends are engageable in the cavity with ends of the workpiece. One of the stems and the respective head is formed with a passage opening axially into the workpiece engaged by the respective head. Fasteners releasable secure the heads on the stems. Each head comprises an end part with an inwardly tapered outer surface and a base part fixed to the respective stem and carrying the respective head. In addition each head has a normally annular mounting plate between the respective base part and end part.