VERFAHREN ZUM HYDRAULISCHEN UMFORMEN EINES ROHRFOERMIGEN HOHLKOERPERS UND VORRICHTUNG ZUR DURCHFUEHRUNG DES VERFAHRENS

摘要

A die (2) formed of two halves (4, 5) is placed in a container (7) filled with an incompressible liquid. The die halves have a plane of contact disposed in parallel relation with and spaced from the axis of a hollow member to be deformed within a die cavity formed by the die halves. Mandrils (15) are forced into sealing contact with the open ends of the hollow member by hydraulic cylinders. A high deformation pressure is supplied into the hollow member and the mandrils are secured in sealing contact with the hollow member against such pressure.