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Thermo-mechanical effects in drilling using metal working fluids and cryogenic cooling and their impact in tool performance

Article dans une revue avec comité de lecture
Author
MARTINS DO OUTEIRO, Jose Carlos
127742 Laboratoire Bourguignon des Matériaux et Procédés [LABOMAP]
LENOIR, Pierrick
BOSSELUT, A.
223582 Mecachrome

URI
http://hdl.handle.net/10985/9860
DOI
10.1007/s11740-015-0619-6
Date
2015
Journal
Production Engineering

Abstract

Cryogenic machining opens up new industrial perspectives in difficult-to-cut materials like nickel-based alloys. In particular, drilling is an operation that generates high thermal and mechanical loading to the drill. There- fore, tool performance, hole geometry and surface integrity can be highly affected. The objective of this study is to analyse tool performance during drilling of IN718 using conventional metal working fluids (MWF) and cryogenic cooling conditions, and correlate it with the thermo-me- chanical phenomena. This study is conducted with standard coated cemented carbide twist drills, designed to work with MWF. The results show that drill performance under cryogenic cooling is strongly affected by its geometry. The axial force, drilling torque and tool wear/failure are higher under cryogenic cooling when compared to conventional MWF. Therefore, in order to take advantage of the cryo- genic machining, new drill design is required, which cur- rently is not available on the market.

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