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Influence of flute number and stepped bit geometry when drilling CFRP/Ti6Al4V stacks

Article dans une revue avec comité de lecture
Auteur
ALONSO, Unai
ccCALAMAZ, Madalina
ccGIROT, Franck
IRIONDO, Edurne

URI
http://hdl.handle.net/10985/16995
DOI
10.1016/j.jmapro.2019.02.006
Date
2019
Journal
Journal of Manufacturing Processes

Résumé

Hybrid stacks made of carbon reinforced plastic (CFRP) and Ti-6Al-4 V alloy (Ti) are often drilled together to reduce positional errors, enhance tight tolerances and minimize machining time. However, this is a complex task due to the dissimilar properties of each material. Tool geometry has a significant impact on the machinability of CFRP/Ti stacks. In this study, the influence of flute number and stepped bit design was experimentally investigated. Confocal and SEM microscopy were used to analyse the evolution of the cutting-edge micro-geometry and the dominant wear modes. The results have shown that a stepped design with three flutes leads to a slower wear progression, lower cutting forces and less hole damage. Furthermore, this paper also highlights the influence of the geometrical characteristics of the stepped tool design on the drilling stage number and on the shape of the thrust force signal. The information gathered can be used for the improvement of the process competitiveness in terms of the reduction of production time and cost.

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Nom:
I2M_CFRP_2019_CALAMAZ.pdf
Taille:
6.462Mo
Format:
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Cette publication figure dans le(s) laboratoire(s) suivant(s)

  • Institut de Mécanique et d’Ingénierie de Bordeaux (I2M)

Documents liés

Visualiser des documents liés par titre, auteur, créateur et sujet.

  • Cutting Forces Parametric Model for the Dry High Speed Contour Milling of Aerospace Aluminium Alloys 
    Article dans une revue avec comité de lecture
    SALGUERO, Jorge; BATISTA, Moises; ccCALAMAZ, Madalina; ccGIROT, Franck; MARCOS, Mariano (Elsevier, 2013)
    Cutting forces is one of the most important outputs in material removal machining processes. Their values depend on a large number of parameters, such as the cutting tool material and geometry, the workpiece material or ...
  • Numerical simulation of titanium alloy dry machining with a strain softening constitutive law 
    Article dans une revue avec comité de lecture
    ccCALAMAZ, Madalina; ccCOUPARD, Dominique; ccGIROT, Franck (Taylor & Francis, 2010)
    In this study, the commercial finite element software FORGE2005, able to solve complex thermo-mechanical problems is used to model titanium alloy dry machining. One of the main machining characteristics of titanium alloys ...
  • Toward a better understanding of tool wear effect through a comparison between experiments and SPH numerical modelling of machining hard materials 
    Article dans une revue avec comité de lecture
    ccCALAMAZ, Madalina; LIMIDO, Jérôme; NOUARI, Mohammed; ESPINOSA, Christine; ccCOUPARD, Dominique; SALAUN, Michel; ccGIROT, Franck; CHIERAGATTI, Rémy (Elsevier, 2009)
    The aim of this study is to improve the general understanding of tungsten carbide (WC–Co) tool wear under dry machining of the hard-to-cut titanium alloy Ti6Al4V. The chosen approach includes experimental and numerical ...
  • A new material model for 2D numerical simulation of serrated chip formation when machining titanium alloy Ti-6Al-4V 
    Article dans une revue avec comité de lecture
    ccCALAMAZ, Madalina; ccCOUPARD, Dominique; ccGIROT, Franck (Elsevier, 2008)
    A new material constitutive law is implemented in a 2D finite element model to analyse the chip formation and shear localisation when machining titanium alloys. The numerical simulations use a commercial finite element ...
  • Strain field measurement in orthogonal machining of a titanium alloy 
    Article dans une revue avec comité de lecture
    ccCALAMAZ, Madalina; ccCOUPARD, Dominique; ccGIROT, Franck (Trans Tech Publications, 2012)
    Improving the cutting processes by optimizing operating parameters necessarily involves understanding the thermo-mechanical mechanisms generated during chip formation. For this, numerical simulations are used to obtain ...

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