Deformation mechanism analysis of three-roller continuous and synchronous calibration process of straightness and roundness for LSAW pipes

The continuous and synchronous calibration process for straightness roundness of LSAW (longitudinally submerged arc welding, LSAW) pipes with three rollers is a bidirectional reciprocating bending process. It includes both axial circumferential directions. particularly important to reveal the deformation mechanism, which provides theoretical support be applied actual production. Based on this, through combination references, analysis numerical simulation, mechanism analyzed in this paper. whole pipe modeled then numerically simulated FEM software ABAQUS. results show that can eliminate difference initial curvature, so curvature are unified same direction value, respectively. realized by synergy between straightening rounding simulation experimental results, mainly caused stress stress.