Prediction of the metric thread quality after axial thread rolling process on cold using of finite element methods

Abstract

The article concerns the possibility of predictions the quality of a cold-rolled thread using numerical methods. An application was developed in the ANSYS/LS-Dyna program in APDL language for simulation of displacements, strains and stresses in the thread during and after the rolling process for various machining conditions and material type. The thread rolling process was treated as a physically and geometrically nonlinear initial and boundary problem with unknown boundary conditions in the contact zone. The object motion equation was adopted for the case of an elastic and visco-plastic body with non-linear hardening. The discrete equation of motion together with the appropriate initial and boundary conditions was solved by explicit method. The example to use the application for the simulation of the thread rolling process of the thread M27×3 is shown. The results of numerical calculations were verified experimentally.