The influence of cutting forces on hole positional deviation when drilling with twist drills in workpiece surfaces of 5° inclination and horizontal surfaces has been investigated. An approach to explain the drill tip wandering phenomena is presented.
Variations in cutting forces were also investigated when drilling in workpieces of different materials and different feedrates with standard as well as short drills. Results of this investigation show that hole positional deviation has an obvious connection to cutting forces. The standard and the short drills show different wandering paths during the penetration process. Standard drills wander down the slope, while the short ones first move downwards and later begin a motion upwards.
References
1.
KaminskiJ.CrafoordR.Position accuracy of drilled holes. Ann. CIRP, 1991, 40(1), 503–506.
2.
SakumaK.KiyotaH.MoritaH.Positional accuracy of hole in drilling (effect of rigidity and point geometry of drill). Bull. ISME, 1983, 26(214).
3.
KahngD. H.A study of sequential quality improvement in hole-making process. Ann. CIRP, 1975, 24(1), 27–32.
4.
LeeS. J.EmanK. F.WoS. M.An analysis of the drill wandering motion. Trans. ASME, J. Engng for Industry, 1987, 109, 297.
5.
GallowayD. F.Some experiments on the influence of various factors on drill performance. Trans. ASME, 1957, 79, 191–231.
6.
ISO 841–1974 0701 Numerical control of machines—axis and motion nomenclature (International Standardization Organization).
