Skip to Main content Skip to Navigation
Journal articles

Analysis of local cutting edge geometry on temperature distribution and surface integrity when dry drilling of aeronautical alloys

Abstract : A suitable choice of tool geometry and tool material and the optimization of cutting conditions is the way towards dry machining, especially for difficult to machine materials. The current paper proposes an experimental work about dry drilling of AA 7075 aluminium and more particularly Ti-6Al-4V titanium alloys. Effects of complex drill geometry on thrust force and cutting temperature variations are explored. This study includes drill normal rake angle definition using a mathematical formulation based on tool CAD definition. Temperature distribution along the drill cutting edge is estimated with a specific device. Cutting forces are measured using a dynamometer table. Hole surface integrity is studied by observation of microstructures, on surface and sub-surface. Micro-hardness tests complete the measurements. Results show that temperature is much higher when drilling titanium Ti-6Al-4V than when drilling aluminium AA7075, with variations from 450 °C to 540 °C along the main cutting edge. Temperature variation along the cutting edge depends on cutting speed, work material and local geometry. Microstructural observations reveal that surface and sub surface are affected with grains elongation in cutting direction. Temperature and microstructural deformation increase with drilling depth.
Complete list of metadatas

https://hal.univ-lorraine.fr/hal-03040827
Contributor : Gael Le Coz <>
Submitted on : Friday, December 4, 2020 - 3:34:21 PM
Last modification on : Tuesday, December 15, 2020 - 4:04:18 AM

File

Analayse of local cutitng edge...
Files produced by the author(s)

Identifiers

Citation

Gael Le Coz, Mohamad Jrad, Pascal Laheurte, Daniel Dudzinski. Analysis of local cutting edge geometry on temperature distribution and surface integrity when dry drilling of aeronautical alloys. International Journal of Advanced Manufacturing Technology, Springer Verlag, 2017, 93 (5-8), pp.2037-2044. ⟨10.1007/s00170-017-0671-9⟩. ⟨hal-03040827⟩

Share

Metrics

Record views

14

Files downloads

17