Open AccessDrilling of CFRP/Ti Stacks in Wet and Cryogenic Condition
Author(s) -
Umberto Prisco
Publication year - 2019
Publication title -
journal of modern mechanical engineering and technology
Language(s) - English
Resource type - Journals
ISSN - 2409-9848
DOI - 10.31875/2409-9848.2019.06.5
Subject(s) - coolant , thrust , liquid nitrogen , drilling , materials science , torque , carbide , cryogenic treatment , composite material , diamond , cryogenic temperature , mechanical engineering , nuclear engineering , metallurgy , engineering , chemistry , thermodynamics , physics , microstructure , organic chemistry
This paper studies the effects of cryogenic liquid nitrogen compared with conventional wet coolant in drilling of CFRP/Ti using diamond-like carbon coated solid carbide tools. The experimental investigation was carried out taking into account the influence of main process parameters and adopting different strategies in the two different materials. The influence of the two different cooling conditions on tool wear was investigated through the comparison of the thrust force and torque; the effect on the hole quality was analysed through the measurements of burr height and diameters. The use of a cryogenic coolant results in both lower thrust force and torque but in a slightly poorer quality of the holes.