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Design of Double Cone Twist Drill Geometry to Improve the Holes Quality While Drilling in Multi-Stack Made of CFRP/Al

[+] Author Affiliations
Redouane Zitoune, Sofiane Alma Bouacif, Collombet Francis

Institut Clément Ader, Toulouse, France

Krishnaraj Vijayan

PSG College of Technology, Coimbatore, India

Paper No. IMECE2014-36526, pp. V02AT02A027; 7 pages
doi:10.1115/IMECE2014-36526
From:
  • ASME 2014 International Mechanical Engineering Congress and Exposition
  • Volume 2A: Advanced Manufacturing
  • Montreal, Quebec, Canada, November 14–20, 2014
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4643-8
  • Copyright © 2014 by ASME

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.

Copyright © 2014 by ASME

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