Effects of a straight oil on friction at the tool-workmaterial interface in machiningReportar como inadecuado

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1 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes 2 LaBoMaP - Laboratoire Bourguignon des Matériaux et Procédés

Abstract : The quantification of friction coefficient along the tool-workmaterial interface in machining remains an issue in tribology. This paper aims identifying the evolution of friction coefficient for a large range of sliding velocity during the machining of a AISI4140 steel 290 HB with a TiN coated carbide tool. The influence of a straight oil is investigated compared to a dry sliding situation dry machining. It has been shown that, in dry machining, friction coefficient decreases with the sliding velocity until reaching a downer limit around 0.2. On the contrary, the presence of a straight oil decreases significantly friction coefficients to a value around 0.1. Additionally, the friction coefficient becomes independent from the sliding velocity. It also been shown that a straight oil is able to penetrate the pin-workmaterial interface even if a very high contact pressure is present ~3 GPa. The penetration duration is very fast, whereas its evacuation duration is much higher and strongly dependant on sliding speeds.

Keywords : Friction Tribology Cutting fluid Straight oil Heat partition coefficient

Autor: Christophe Claudin - Alexandre Mondelin - Joel Rech - Guillaume Fromentin -

Fuente: https://hal.archives-ouvertes.fr/


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