Investigation of Burr Formation and Tool Wear During the Drilling of Commercial Purity Copper Material

Abstract

Copper is one of the materials that are sought and requested in many sectors due to its high electricaland thermal conductivity values. Its high ductility makes it difficult to drill commercial purity copperand has a negative effect on hole quality. In this study, commercial purity copper material wassubjected to drilling tests with HSS drills without using coolant. Surface roughness, deviation fromdiameter and deviation from cylindrical values were measured in varying drilling conditions and alsomodeled by regression analysis. Quantitative effects of the results were determined by analysis ofvariance. Also, wears occurring in the drill bits, burr formations at the entrance and exiting of the holewere examined. As a result of the regression analysis, it was observed that the feed rate on the surfaceroughness value, the coating status for the deviation from cylindrical and diameter had a significanteffect on the results (P