An analytical evaluation of the cutting forces in self-piloting drilling using the model of shear zone with parallel boundaries .2. Application

This paper presents the second part of a two-part series which analyses a cutting forces model for self-piloting tools (SPT). In this second part, the influences of the tool geometry and design parameters on force calculations are analysed and a method to construct a complete force model for SPTs is proposed. For the verification of the proposed model, some selected experiments with several different geometries of SPT were carried out. Comparisons show that the theoretical results are in reasonably good agreement with the experimental data. Copyright (C) 1996 Elsevier Science Ltd