The Influence of Various Process Parameters on Coefficient of Friction on Die at Ironing of AlMg3 Sheet Metals

Abstract

Friction coefficient on die side is extremely important in ironing process. Drawing force value, and therefore the power consumed for process performance, will depend on it. That opens up a great number of specific problems, such as: change of friction coefficient on sliding path, significance of tool roughness and its interaction with initial and then varied roughness of material being formed, course of wear process and possible local welding (appearance of “galling"), possibility for lubrication and its quality etc. In the closed system tool-lubricant-material,numerous tribological factors are present, most of which can be varied throughout the process, and during particular interaction, which makes the entire problem extremely complex. The obtained results indicate complex influence of selected analysed parameters of ironing process on coefficient of friction on die side.