Evaluation of the performance of coated and uncoated carbide tools in drilling thick CFRP/aluminium alloy stacks

Maxime Montoya (1) , Madalina Calamaz (1) , Daniel Gehin (1) , Franck Girot (1)

1 I2M - Institut de Mécanique et d'Ingénierie de Bordeaux

This paper aims to establish the wear mechanisms of coated and uncoated tungsten carbide drills when drilling carbon fibre reinforced plastics (CFRP)/aluminium alloy (Al) stacks. During the drilling experiments, thrust forces were measured. A scanning electron microscope (SEM) and a numerical microscope, provided with a scanning device, were periodically used to analyse tool wear mechanisms and to measure wear progression of the tool cutting edges. For both coated and uncoated drills, abrasion was the dominant tool wear mechanism, affecting the entire cutting edges. Higher wear was observed on uncoated tools which caused a significant increase in thrust force during drilling both Al and CFRP materials. The influence of these phenomena on the quality of the holes and on the generated roughness was also discussed.

Mots clés: Drilling; Composite/aluminium stacks; tools wea; holes quality; thrust force

Domaines: Génie des procédés; Génie mécanique [physics.class-ph]; Génie mécanique [physics.class-ph]

Maxime Montoya, Madalina Calamaz, Daniel Gehin, Franck Girot. Evaluation of the performance of coated and uncoated carbide tools in drilling thick CFRP/aluminium alloy stacks. International Journal of Advanced Manufacturing Technology, 2013, 68, pp.2111-2120. ⟨10.1007/s00170-013-4817-0⟩. ⟨hal-00911061⟩