Separating or piercing device for workpiece deformed by internal pressure has elastic membrane subject to pressure for separating or piercing

摘要

The separating or piercing device includes an elastic membrane (M) in the workpiece (1), which can be subjected to the separating or piercing pressure (ps) at least in the region of the cutting edge (6.1), whereas the pressure required for the internal high pressure deformation is applied outside the membrane. This requires to separate pressurized fluid inputs (4, 4.1) and two pressure cavities (5, 5.1).