Computer Modelling of Pipe Straightening Process on a Six-Roller Cross-Roll Machine

The role of computer modelling in the research of physical and industrial objects has significantly increased, as well as the quality of programs for modelling processes. Finite element modelling is successfully used to study metal forming processes, which allows to study phenomena and improve technology. In this paper, with the use of Abaqus CAE software for finite element analysis, a solid-state model of a sixroller cross roll machine for straightening of rolled pipes was built. The spread of such machines is constrained by the difficulties of setting up the process of straightening of pipe end sections at the entrance and exit from the edge rolls, where buckling defects occur. Minimization of residual pipe curvature is also important. In order to predict the stress-strain state and force modes of tube dressing, finite element modelling was carried out, which revealed the character of influence of design and technological parameters of the dressing process in profiled rolls with symmetrical profiling of pairs of edge rolls. According to the results of computer modelling, the crossed rolls overlapping conditions were established, which allow to reduce the residual curvature of the pipe three times.