Impero, Filomena (2017) The drilling of CFRP and Ti6Al4V stacks an innovative approach. [Tesi di dottorato]

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Item Type: Tesi di dottorato
Lingua: English
Title: The drilling of CFRP and Ti6Al4V stacks an innovative approach
Creators:
CreatorsEmail
Impero, Filomenafilomena.impero@unina.it
Date: 10 April 2017
Number of Pages: 105
Institution: Università degli Studi di Napoli Federico II
Department: Ingegneria Chimica, dei Materiali e della Produzione Industriale
Dottorato: Ingegneria dei prodotti e dei processi industriali
Ciclo di dottorato: 29
Coordinatore del Corso di dottorato:
nomeemail
Mensitieri, Giuseppegiuseppe.mensitieri@unina.it
Tutor:
nomeemail
Squillace, AntoninoUNSPECIFIED
Date: 10 April 2017
Number of Pages: 105
Uncontrolled Keywords: Drilling, CFRP/Ti stack, Cryogenic
Settori scientifico-disciplinari del MIUR: Area 09 - Ingegneria industriale e dell'informazione > ING-IND/16 - Tecnologie e sistemi di lavorazione
Date Deposited: 27 Apr 2017 14:32
Last Modified: 08 Mar 2018 13:48
URI: http://www.fedoa.unina.it/id/eprint/11841
DOI: 10.6093/UNINA/FEDOA/11841

Abstract

The thesis deals the problems about the drilling focusing the experimental investigation on the drilling of Carbon Fibers Renforce Plastics and titanium stacks using tungsten carbide tools in cobalt matrix (WC-Co) coated with Diamond Like Carbon (DLC) and uncoated. It is an experimental campaign divided into two phases in order to define the optimal performance in terms of forces and torque and quality of the hole analyzing diameter measurements, delamination, pull-out and height of burr was performed. In the first phase drilling strategy, influence of process parameters and cooling conditions were investigated on the wear of the tools and the quality of holes. An innovative cooling method has been analyzed: cryogenic cooling using the liquid nitrogen (LN2) as refrigerant element compared to conventional lubricating-cooling method. In the second phase has been completed a drilling campaign using the optimal drilling conditions defined in the previous phase. Objective of the latter phase was to define the hole number of best quality realized with tools made with different grain size WC grains uncoated and coated.

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