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dc.contributorGhassemieh, Elaheh
dc.contributor.authorFígols López, Héctor
dc.description.abstractDefects during the drilling process in carbon fibre laminates can result in late stage rejections in the aerospace industry. This project shows a comprehensive analysis of the influence of drilling parameters on hole quality and delamination. Also, optimum drilling conditions are presented. Drilling at different parameters with both drills uncoated and coated allowed the examination of the impact of the drilling parameters and the drill’s coating on the results. Although during the machining unexpected high temperatures damaged the top surface of the work-piece, measurements of peel-up delamination at the holes entrances showed that it was improved by using a high feed rate and a low spindle speed. Push-out delamination could not be measured due to the poor quality of the holes exits. The overheating and the poor hole quality at the exits of the holes were mainly caused by the drill’s geometry, which was proved to not be the most adequate for the job. Drilling parameters also influenced both problems, which were increased when a low feed rate and a high spindle speed were used. In these same conditions the drills suffered the most wear and damage too. Although the drill’s coating showed no impact on delamination or hole quality results, it was an effective solution regarding tool wear. A second study regarding drilling conditions was carried out to improve the overheating and the poor holes quality achieved at the exits in the first study. The results showed that the use of coolant avoided high working temperatures and the use of a sacrifice board led to clean exits in where the delamination factor could be calculated.
dc.publisherUniversitat Politècnica de Catalunya
dc.publisherQueen's University Belfast
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subject.lcshCarbon fibers -- Testing
dc.subject.lcshDrilling and boring machinery
dc.subject.lcshRolling (Metal-work)
dc.titleEffect of drilling process on hole quality, delamination of CFC
dc.typeMaster thesis (pre-Bologna period)
dc.subject.lemacFibres de carboni -- Proves
dc.subject.lemacLaminatge (Metal·lúrgia)
dc.rights.accessOpen Access
dc.audience.educationlevelEstudis de primer/segon cicle
dc.audience.mediatorEscola Tècnica Superior d'Enginyeria Industrial de Barcelona
dc.contributor.covenanteeQueen's University of Belfast

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Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain