Dynamic and thermal aspects of tribologic processes in metal cutting

The mathematic model shown by the specialty literature suits to an uniform stationary thermal status, respective to the same temperature in the entire cutting and tool blade and time constant, quite far from reality even for a qualitative and phenomenological analysis. The hypothesis taken into consideration, according to which heating in the cutting area is uniform and stationary, can be appreciated as a particular case that cannot be real. That is why a specific model is required for the heating sources, able to lead to a correct determination of real thermal status, non-stationary and non-uniformly distributed, that, in time, leads to a stationary and non-uniformly distributed thermal status, depending on the influencing factors, the most important of them being as follows: the cutting process parameters; the physical and mechanical properties of the tool blade and cutting; the environmental heat exchange; the feed-back interdependence between different influencing factors; the cutting process dynamic phenomena. The main objective of the present paper is to combine in a single model the dynamic, thermal and tribologic phenomena, in order to evaluate in advance the wear intensity and to find out the way to influence it.