Hydraulically shaping a tubular hollow body

摘要

A die with two die halves (4, 5) is placed in a tank with an incompressible liquid. The die joint is located in spaced parallel relationship to the horizontal plane passing through the longitudinal axis (13) of the hollow body (1b). The ends of the hollow body (1b) are placed under the influence of hydraulic cylinders (17). Plugs (15) are driven into the ends of the hydraulic cylinder (17) and are held in the sealing position at the high internal shaping pressure (P(i)) in the hollow body (1b). The hollow body is preformed in the liquid by closure of the die before the closure of the ends and the application of internal hydraulic pressure.