Limitations of physical tribo-modeling in metal forming processes

Abstract

The significance of contact friction in metal forming processes is very known. The general approach in this area involves the recognition of the influence of the main tribological parameters – pressure, speed and temperature in metal forming. The developed methods are very different for physical modeling of tribological phenomena and influence in a very specific types of metal forming. These methods basically have the appropriate physical model which imitates local area or a complete work piece in metal forming. The indicators of models can be very different: the deformation forces, forming limit parameters, coefficient of friction, temperature distribution, etc. This paper analyzes the physical models in cold metal forming processes, according to their characteristics and limitations.