The Decreasing of the Extrusion Time with Varying Ram Speed

In the extrusion process, friction and workpiece deformation usually cause an increase in the temperature of the extrudate. During the stroke, this temperature increase may reach a critical level and restrict the ram speed. In this study, extrusion processes, which were conducted under real production conditions, were simulated at different ram speeds using finite element modeling. In this way, the maximum workable constant ram speed was determined according to a defined critical extrusion temperature as a reference value. In the next stage, new ram-speed models were developed as alternatives to the maximum-workable, constant ram speed. The results showed that the time taken to extrude could be significantly shortened by using these models.