Simulation of Continuous Roll Forming Process for Producing Welded Pipes of Small and Medium Diameters

Abstract

The finite-element model and the results of simulation of the continuous plastic forming process of producing welded pipes of small and medium diameters in TESA electric pipe welding line are described. It is shown that the roll forming process is characterized by a nonuniform stress–strain state (SSS) of the metal throughout the entire process. Experimental results on residual stresses in welded pipes before and after welding and sizing, which validate the results of the mathematical simulation, are presented. To reduce the residual stresses and the nonuniformity of the SSS of a hollow workpiece, it is recommended to use intensive reversed deformation.