Internal high pressure deformation device for pipes has a boring for finishing region of workpiece leaving gap filled with fluid

摘要

That the formation device includes a deforming tool (2, 3) with an engraving corresponding to the required final shape. It includes a fluid pressure input (5) into the workpiece cavity and a finishing punch (20) to move the workpiece longitudinally. The finishing region includes a boring (10) with a fluid-filled gap (S1) between it and the outside of the finishing region.