Independent analyses of cutting and friction forces applied on a single polycrystalline diamond compact cutter
Résumé
This paper presents ananalysis of the excavation forces involved in the cutting action and in the friction
of a cutter/rock contact.A vertical lathe-type device provided data on the forces applied on a single cutter
under dry excavation conditions.A cutting device was used to perform cutting experiments with unworn
and worn cutters.A tribometer wa sused to perform friction tests on the cutters wear flat previously
realized with the vertical lathe.The experiments display results conform to theliterature as the non-
dependence of the cutting coefficient to the rock properties.Then, this study focuses on the cutting
forces and explains that these forces include a component of rocks hearing and impact friction.The
impact friction is induced by the interaction between ejected rock particles and the cutting active area.
The evidence of this impact friction is then brought by the formation of an eroded zone on the cutting
active area