Abstract Cold extrusion of gear is a 3D volume plastic but non-steady-status forming process, whose deformation mechanism is extremely complex. This paper constructs a streamline die cavity based on NURBS and simulates the extrusion process of spur gear in an application, in which large deformation rigid-plastic FEM is adopted. The results indicate that continuous extrusion utilizing streamline die cavity is effective in improving metal filling in corner, reducing deformation break and enhance the uniformity of deformation distribution. This conclusion can be adopted as a reference for process design of gear extrusion.
LIU Quan-Kun, LI Dong-Sheng. Numerical simulation analysis of cold extrusion for spur gear based on streamline cavity. Chinese Journal of Engineering Design, 2005, 12(1): 15-19.
