E.J.A. Armarego

TL;DR: In this paper, a cutting analysis based on oblique cutting models was developed for the drill lips of flat rake face (modified) drills, and the concept of geometrical similarity was studied and shown to be useful for prediction of forces in drilling and for the design of twist drills.

TL;DR: In this article, the problem of defining the rake angle which controls the cutting process in oblique machining is considered, and it is concluded from the experimental results that the rake angles normal to the cutting edge are of greatest significance.

TL;DR: In this article, a numerical investigation showed that the circular tooth path is a very good approximation of the true cutter path, and the experimental trends are consistent with those predicted analytically and similar to those shown in other cutting operations.

TL;DR: In this article, the effect of geometrical similarity on the deformation and forces of different sized conventional and modified drills has been experimentally confirmed and the flat rake face modified drill considerably reduced the forces in drilling.

TL;DR: In this paper, the authors developed a plane deformation model for symmetrical triangular cuts and compared the theoretical and experimental force functions for single-edge orthogonal cuts, full-depth and non-full-depth triangular cuts.