Predicting Forming Defects in Thin-walled Circular Tubes Made of A286 Based on Deform-3D

Abstract

We conduct a study on the thin-wall characteristics of a certain type of A286 thin-walled pipe fittings during the swaging forming process, focusing on the issues of folding and incomplete filling. In order to explore the forming mechanism of defects in thin-wall pipe fittings, the Deform-3D finite element software is utilized for numerical simulations. Through analysis of the forming results, equivalent stress, equivalent strain, material flow lines, and material flow patterns during the swaging forming process, it is found that the occurrence of defects in the thin-wall pipe fittings during the forming process is closely related to the material flow behavior. When the material flows in a positive extrusion manner during the thin-wall feature forming process, the specimen exhibits obvious folding defects. Moreover, there is significant stress concentration occurs in the transition region between the rod and the head.