The purpose of this research is to study holes surface quality drilled by unconventional methods. Tested technologies were Laser, Water Jet and EDM. As a reference bores were used two holes drilled by regular HSS drill. The surface quality is rated by microscopic images taken from two sides - Entering and Outputting side. Further evaluation consists of the hole inside surface quality taken from the scanned texture, deviations from the ideal cylindrical shape and measured areal roughness Sa, Sq, Sz.
Suchánek, L., & Zetková, I. (2015). Evaluation of the surface small holes drilled by unconventional methods. In Procedia Engineering (Vol. 100, pp. 1582–1590). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2015.01.531