Investigation of productivity, energy efficiency, quality and cost for laser drilling

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dc.contributor.advisorShehab, Essam
dc.contributor.advisorSalonitis, Konstantinos
dc.contributor.advisorSuder, Wojciech
dc.contributor.authorSarfraz, Shoaib
dc.date.accessioned2023-09-28T11:12:51Z
dc.date.available2023-09-28T11:12:51Z
dc.date.issued2020-10
dc.description.abstractLaser drilling is a high speed, non-contact advanced machining process and has proven to be an important industrial process for producing cooling holes in various aeroengine components; in particular high-pressure turbine blades, combustor liners and nozzle guide vanes. However, an increase in the number of cooling holes demands the need for effective utilisation of laser drilling process capability. Material removal rate (MRR), specific energy consumption (SEC), hole taper and the drilling cost are the basic performance indicators to meet this goal. Hence, this research aims to examine the laser drilling process in terms of the mentioned performance measures. Taking into account the significance of material removal quantity, energy efficiency, product quality and manufacturing cost, this study is performed in the form of an experimental investigation for three laser drilling processes, namely, single-pulse drilling, percussion and trepanning. Two different laser drilling setups were prepared to produce holes in Inconel 718 superalloy sheets using flashlamp-pumped Nd:YAG laser and Quasi-CW fibre laser. This research contributes to an evaluation of the influence of laser drilling process parameters on the MRR, SEC, hole quality and drilling cost. Moreover, the performance of laser drilling methods has been compared in relation to the selected performance measures. To further understand the significance of laser sources, the performance of laser drilling was compared for the mentioned drilling setups. This research also introduced a detailed cost analysis to explore the economic implications of the laser drilling process. In addition, optimal drilling conditions were determined aiming to maximise the MRR and minimise hole taper and drilling cost.en_UK
dc.description.coursenameManufacturingen_UK
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/20297
dc.language.isoenen_UK
dc.publisherCranfield Universityen_UK
dc.publisher.departmentSATMen_UK
dc.rights© Cranfield University, 2020. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright holder.en_UK
dc.subjectLaser drillingen_UK
dc.subjectSingle-pulseen_UK
dc.subjectPercussionen_UK
dc.subjectTrepanningen_UK
dc.subjectMaterial removal rate (MRR)en_UK
dc.subjectSpecific energy consumption (SEC)en_UK
dc.subjectHole taperen_UK
dc.subjectCost estimationen_UK
dc.subjectOptimisationen_UK
dc.titleInvestigation of productivity, energy efficiency, quality and cost for laser drillingen_UK
dc.typeThesis or dissertationen_UK
dc.type.qualificationlevelDoctoralen_UK
dc.type.qualificationnamePhDen_UK

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