ImproYing the Roller Shaping of Large-Diameter Pipe from Strip

摘要

Current geometric requirements on pipe-especially thin-walled pipe for gas pipelines-set strict limits on the deviation of the cross section in shaping. A special control algorithm for the drives in the sheet-bending machine minimizes local geometric errors in the cross section during the roller shaping of large-diameter pipe from strip. Analysis of the nonuniformity in deformation permits the formulation of a cyclic operating sequence for the drives. Experiments confirm its effectiveness. On the basis of this research, auto-matic control of the drives in the sheet-bending machine is possible.