Publication :

Title:

DESIGN OF DOUBLE CONE TWIST DRILL GEOMETRY TO IMPROVE THE HOLES QUALITY WHILE DRILLING IN MULTI-STACK MADE OF CFRP/AL

Authors: R. Zitoune, V. Krishnaraj, S. Almabouacif and F. Collombet
Year: 2014
Proceedings de : Proceedings of International Mechanical Engineering Congress and Exposition. P. IMECE2014-36526 .


Abstract:
In this paper, experimental and numerical studies on drilling of multi-material made of CFRP laminate sandwiched with aluminum part have been carried out. These tests have been conducted using carbide drills (K20) to study the influence of spindle speed, feed rate and lip length of the double cone drill on cutting forces and holes quality. From the experimental study it was found that the double cone drills used for the experimental analysis encountered less thrust force compared to the standard twist drill. In addition the quality of the holes after drilling was evaluated, and found that no delamination (entry and exit of the hole of the composite part) even at higher feed rate (> to 0.1 mm/rev). By numerical modeling, it was noticed that, after machining with standard twist drill at higher feed rates, the thrust force generated induces a small opening at the CFRP/Al interface.

Bibtex citation :
@INPROCEEDINGS{Zitoune2014,
Author={Zitoune, R. and Krishnaraj, V. and Almabouacif, S. and Collombet, F.},
Title={DESIGN OF DOUBLE CONE TWIST DRILL GEOMETRY TO IMPROVE THE HOLES QUALITY WHILE DRILLING IN MULTI-STACK MADE OF CFRP/AL},
Booktitle={Proceedings of International Mechanical Engineering Congress and Exposition. P. IMECE2014-36526 },
Pages={},
Year={2014}}