Method and apparatus for bending tubes

摘要

Method for bending tubes in which, during the bending operation, the tubes are filled with a liquid, which is subjected to a pressure, and, in addition, a tensile force is exerted on the tube during the bending operation by means of an externally acting forming pressure. Apparatus for bending tubes (82) with means for sealing off the two ends of the tube and for building up a liquid pressure in the tube. To carry out the bending operation, a forming press (10) is provided on which clamping elements (28) that grasp and seal off the two ends of the tube are pivoted, each of the clamping elements having a passage (54) for the supply of the pressurised liquid and means for subjecting the tube (82) to a tensile load during the bending operation. <IMAGE>