Modeling Stress State Carbide Dies for Hexagonal Rods Production

The main cause of the tool failure is the collapse of the monolithic die. In order to determine the cause of the die collapse, the modeling of the hexagonal rod drawing process was performed. Based on computer simulation using the finite element method, the qualitative and quantitative distribution of the radial, circumferential, axial stresses along the length of the working channel of the die for drawing hexagon has been determined. The plots of stress distribution of a drawing tool are constructed. The reasons for the collapse of the hexagonal rod drawing tool are established. A new design of the hexagonal bars drawing tool in the form of a sectoral die are presented, determined by the stress–strain state of the polyhedral sectoral die. The implementation of the die in the form of sector elements excludes the concentration of tensile circumferential stresses in the longitudinal section of the die. The new design of the tool allows increasing the durability of the die.