Study of the Influence of Tool Wear of Two Drill Bits Manufactured with Different Coating Processes in Drilling Carbon/Glass Fiber Hybrid Composite Bounded with Epoxy Polymer

Fiber Reinforced Polymer (FRP) laminates have been widely used in engineering applications recent decades. This is mainly due to their superior mechanical properties compared single-phase materials. High strength-to-weight ratio, high stiffness, and excellent corrosion fatigue resistance are some of the attractive these In large structures, drilling composite panels a typical operation assemble different parts with fasteners. severely threatens quality holes and, therefore, joint strength. study aims wear evolution two drill bits manufactured coatings processes (chemical vapor deposition physical deposition) influence on holes. A carbon/glass fiber sandwich structure was selected as workpiece, high-speed machine center 1403 per tool laminates. The analysis characterized terms flank crater wear. For delamination caused by drilling, types identified (type I II), values were quantified through equivalent factor (Fed). results showed that, general, process apply coating influences mode damage. first tool, diamond coated Chemical Vapor Deposition (CVD), more severe face loss at end cutting edges. However, Physical (PVD) process, second presented controlled but edge rounding near tip, producing further delamination. Using supporting plate reduction type not for II, which related rounding.