ANORDNING VID APPARATER FOR TILLVERKNING AV TOJBARA BELGAR TILL RORLEDNINGSNET

摘要

The manufacture of hydroforming of a deformable expansion bellows. A deformable sleeve is held on a support with an inner sleeve supported inside it to define a space into which is injected liquid under pressure. An axial force is applied to the sheath with the space pressurized to produce corrugation of the sheath so as to form a bellows.