Дисертації з теми "Laser manufacturing"
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Mikler, Calvin. "Laser Additive Manufacturing of Magnetic Materials." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc1011873/.
Повний текст джерелаHong, Zhihan, and Rongguang Liang. "IR-laser assisted additive freeform optics manufacturing." NATURE PUBLISHING GROUP, 2017. http://hdl.handle.net/10150/625522.
Повний текст джерелаFoster, Moira. "Defect Detection in Selective Laser Melting." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1874.
Повний текст джерелаPereira, M. F. V. T., M. Williams, and R. Bruwer. "Rapid die manufacturing using direct laser metal deposition." Journal for New Generation Sciences, Vol 7, Issue 3: Central University of Technology, Free State, Bloemfontein, 2009. http://hdl.handle.net/11462/542.
Повний текст джерелаGlobal issues such as energy and climate changes have impacted on both the automotive and aerospace industries, forcing them to adopt measures to produce products that consume fewer combustibles and emit less carbon dioxide. Making vehicles lighter is one of the logical ways of reducing fuel consumption. The need for light components, able to fulfil technical and quality specifications, led to market growth for tooling that is able to mass produce parts using manufacturing processes such as high pressure die casting. Competitive pressures to reduce the lead time required for tooling-up has also increased dramatically. For this reason research into various methods, techniques and approaches to tool manufacture is being undertaken globally. This paper highlights the work undertaken at the CSIR on the issue of rapid die manufacturing through the application and evaluation of a rapid prototyping technique and coating technologies applied to die components of a high pressure casting die for the production of aluminium components. Criteria for determining suitability were developed against which the technique was evaluated that included time, cost and life-expectancy. Results of accelerated testing procedures to evaluate the die material produced by the rapid prototyping technique and surface coatings and treatments of die materials for their resistance to washout, erosion, heat checking and corrosion in a high pressure die casting environment, are presented. The outcomes of this research will be used for further development and application of specific techniques, design principles and criteria for this approach.
Lee, Yousub. "Simulation of Laser Additive Manufacturing and its Applications." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1440360229.
Повний текст джерелаShannon, Geoff. "Laser welding of sheet steel." Thesis, University of Liverpool, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240883.
Повний текст джерелаMurphy, M. L. "Rapid prototyping by laser surface cladding." Thesis, University of Liverpool, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284268.
Повний текст джерелаIravani, Ebrahim. "Laser and eddy current measuring techniques for agile manufacturing." Doctoral thesis, KTH, Production Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3312.
Повний текст джерелаPoonjolai, Erasenthiran. "Laser cutting, machining and welding for layered manufacturing applications." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399289.
Повний текст джерелаBourchas, Konstantinos. "Manufacturing Effects on Iron Losses in Electrical Machines." Thesis, KTH, Elektrisk energiomvandling, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172373.
Повний текст джерелаI detta examensarbete studeras hur de magnetiska egenskaperna hos SiFe-plat paverkas av skarning och svetsning. Permeabilitet och jarnforlustdensitet undersoks eftersom de ar kritiska variabler for elektriska maskiners prestanda. De magnetiska matningarna genomfordes pa en Epstein ram med en odesfrekvens pa 50, 100 och 200 Hz, enligt IEC 404-2. E ekterna av mekanisk skarning med giljotin samt skarning med ber- och CO2-laser studerades. Inverkan av olika berlaserinstallningar undersoktes ocksa genom att variera gastrycket, skarhastigheten samt frekvensen och e ekten av laserstralen. For att oka skare ekten inkluderades Epsteinremsor med ytterligare 1, 2 och 3 langsgaende skarsnitt. Det visas att mekanisk skarning har en mindre paverkan pa de magnetiska egenskaperna hos materialet an vad laserskarning har. Matningar pa plat med 1.8% Si visar att da prov med tre extra langsgaende giljotinklipp anvands kan permeabiliteten reduceras med upp till 63% och jarnforlusterna kan oka med upp till 35%. Motsvarande resultat for laserskurna platar visar en permeabilitetsreduktion pa upp till 65% och en jarnforlustokning pa upp till 65%. Ur studien av de tva studerade skarprocesserna framkommer aven att tunnare plat paverkas mindre negativt an tjockare plat. Ett antal olika installningar har provats for att utreda hur olika parametrar paverkar e ekterna av laserskarning. Studien indikerar att skarning med hog e ekt och hog hastighet ger den minsta paverkan pa materialets magnetiska egenskaper. Vilket aven har en positiv inverkan pa produktiviteten vid laserskarning. Epsteinprover har aven utforts for att undersoka vilka e ekter som introduceras da SiFe-plat svetsas. Provstyckena bestod av remsor med en, tre, fem och 10 svetspunkter. Experimenten visar en jarnforlustokning med upp till 50% samt en permeabilitetsreduktion upp till 62% da platarna svetsats samman tva och tva. En modell for att studera e ekterna av de forandrade materialegenskaperna vid skarning pa en induktionsmotor utvecklas och implementeras i en FEM-baserad mjukvara. Resultaten tyder pa en jarnforlustokning med 30% da skare ekten orsakad av giljotin beaktas. Vid simulering av laserskuren plat kan denna okning vara sa stor som 50%. Det framkommer aven att laserskarningen kan reducera e ektfaktorn sa mycket som 2.6%.
Li, Lin. "Intelligent laser cladding control system design and construction." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/7683.
Повний текст джерелаDuran, Olga. "Automated camera/laser-based pipe inspection." Thesis, King's College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407464.
Повний текст джерелаVoisey, Kathleen Theresa O'Sullivan. "Laser drilling of metals and ceramics." Thesis, University of Cambridge, 2002. https://www.repository.cam.ac.uk/handle/1810/272329.
Повний текст джерелаRen, Lan. "Integrated process planning for a hybrid manufacturing system." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2008. http://scholarsmine.mst.edu/thesis/pdf/Ren_09007dcc8046714a.pdf.
Повний текст джерелаVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed April 18, 2008) Includes bibliographical references.
Roberts, Ibiye Aseibichin. "Investigation of residual stresses in the laser melting of metal powders in additive layer manufacturing." Thesis, University of Wolverhampton, 2012. http://hdl.handle.net/2436/254913.
Повний текст джерелаSvedberger, Johan, and Jonas Andersson. "Laser scanning in manufacturing industries : The potential and usability of laser scanning for industrial applications." Thesis, KTH, Industriell produktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-134954.
Повний текст джерелаAitchison, David Robert. "Laser based cutting tool condition monitoring." Thesis, University of Hull, 1995. http://hydra.hull.ac.uk/resources/hull:3693.
Повний текст джерелаRanjan, Rajit. "Design for Manufacturing and Topology Optimization in Additive Manufacturing." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439307951.
Повний текст джерелаZheng, Hong Yu. "In-process quality analysis of laser cutting." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/7792.
Повний текст джерелаLongfield, Nicholas Peter. "An investigation of ultrasonically modified laser welding." Thesis, Coventry University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364684.
Повний текст джерелаJones, Jason Blair. "Investigation of laser printing for 3D printing and additive manufacturing." Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/59733/.
Повний текст джерелаSundqvist, Jesper. "Heat conduction effects during laser welding." Licentiate thesis, Luleå tekniska universitet, Produkt- och produktionsutveckling, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17902.
Повний текст джерелаGodkänd; 2015; 20150911 (jessun); Nedanstående person kommer att hålla licentiatseminarium för avläggande av teknologie licentiatexamen. Namn: Jesper Sundqvist Ämne: Produktionsutveckling/Manufacturing System Engineering Uppsats: Heat Conduction Effects During Laser Welding Examinator: Professor Alexander Kaplan, Institutionen för teknikvetenskap och matematik, Avdelning: Produkt- och produktionsutveckling, Luleå tekniska universitet Diskutant: Professor Lars Pejryd, Örebro universitet, Örebro Tid: Tisdag 10 november, 2015 kl 12.30 Plats: E632, Luleå tekniska universitet
Burkhardt, Irmela [Verfasser]. "Dissimilar titanium and titanium aluminide joints manufactured by laser beam welding and laser additive manufacturing / Irmela Burkhardt." Hamburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2021. http://d-nb.info/1224966562/34.
Повний текст джерелаShiu, Pun Pang. "Controlled-depth laser cutting of aluminum sheet for Laminated-Object Manufacturing." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63367.pdf.
Повний текст джерелаSyed, Waheed Ul Haq. "Combined wire and powder deposition for laser direct metal additive manufacturing." Thesis, University of Manchester, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556499.
Повний текст джерелаStarz, Anton Johannes. "A calculation concept to reduce manufacturing cost on laser sintering machines." Thesis, Bloemfontein : Central University of Technology, Free State, 2008. http://hdl.handle.net/11462/117.
Повний текст джерелаA company’s ability to produce products faster and more economically may lead to a competitive edge in the international market. The reduction of development costs and shortened development time will undeniably depend on effective organisational structures that are based on effective information- and communication techniques and manufacturing technologies. An innovative manufacturing technology that impacts on rapid product development is Rapid Prototyping (RP). The Centre for Rapid Prototyping and Manufacturing (CRPM) works closely with South African companies, supporting them with common mechanical engineering solutions and specialising in the manufacturing of prototypes. One of the options offered in the manufacture of prototypes is the Laser Sintering (LS) process. It is however, difficult to determine the product cost for the building volume used to manufacture the prototypes. Prototypes from different clients can be manufactured at the same time in the same process. The problem however, is how to calculate the costs for each prototype and to offer the clients an accurate quotation for the manufacture of the prototype. Therefore, it is necessary to design a calculation concept, which includes all accrued costs and allocate these to the different parts/prototypes. As it is problematic to calculate the manufacturing cost of prototypes, it is necessary to analyse all the effects, parameters and influences on the manufacturing process in order to determine the manufacturing time, and ultimately the machine costs. This is needed to calculate the total cost of one platform and the cost of each individual part. The project, through various experiments determined how to allocate the costs, through a correlation between part volume and platform height. The aim of the study was to determine a calculation concept to estimate the total platform cost and the cost of each individual part. Furthermore, the estimated cost was compared with the actual cost to determine the deviation between the calculation methods, and lead to a calculation concept that can be used to predict and reduce the manufacturing costs. The results obtained from the research were used for an exact calculation and reduction of prototype unit costs manufactured on LS machines, which gave three basic advantages: * Manufacturing costs were reduced to benefit clients, which meant that they could invest more in the design of new prototypes and products, to improve customer satisfaction * Prototype manufacturing on expensive RP machines could be optimised by using more prototypes and lower costs for entering the market. * The calculation risk could be minimised, which lowered the risk of losing money on a project and resulted in better planning for available resources.
Juhasz, Michael J. "In and Ex-Situ Process Development in Laser-Based Additive Manufacturing." Youngstown State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ysu15870552278358.
Повний текст джерелаLanger, H. J., and M. Shellabear. "Recent e-Manufacturing solutions developed by EOS." Journal for New Generation Sciences, Vol 4, Issue 1: Central University of Technology, Free State, Bloemfontein, 2006. http://hdl.handle.net/11462/492.
Повний текст джерелаe-Manufacturing means the fast, flexible and cost-effective production of parts directly from electronic data, which can include rapid prototyping, rapid tooling, (spare) parts on demand etc. Especially interesting is the direct manufacture of enduse parts. In this paper, recent case studies will be presented showing commercial e-Manufacturing projects including small production batches and mass customized series production from various industrial branches. The paper also discusses the relevance of several recent technological innovations in laser-sintering for e- Manufacturing, especially how increasing the productivity of machines and process chains has increased the range of applications which are cost-effective using lasersintering.
Case studies include:
- small series production (up to a few thousand p.a.) of products
- production of customized (one-off) products
- mass production of customer-specific (mass customized) products
- optimized tooling concepts for production of up to millions of products
Ryder, Gerard Joseph. "A numerical model of the selective laser sintering process." Thesis, University of Leeds, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271961.
Повний текст джерелаLamas, Javier. "Analysis of laser arc hybrid welding experiments." Licentiate thesis, Luleå tekniska universitet, Produkt- och produktionsutveckling, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26147.
Повний текст джерелаGodkänd; 2014; 20141112 (alka); Nedanstående person kommer att hålla licentiatseminarium för avläggande av teknologie licentiatexamen. Namn: Javier Lamas Ämne: Produktionsutveckling/Manufacturing Systems Engineering Uppsats: Analysis of Laser Arc Hybrid Welding Experiments Examinator: Professor Alexander Kaplan, Institutionen för teknikvetenskap och matematik, Luleå Tekniska universitet Diskutant: Professor Petri Vuoristo, Tammerfors tekniska universitet Tid: Torsdag den 18 december 2014 kl 09.30 Plats: E206, Luleå tekniska universitet
Ivarson, Anders. "Laser cutting: an experimental and theoretical investigation." Licentiate thesis, Luleå, 1991. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16891.
Повний текст джерелаLampa, Conny. "Practical and theoretical aspects of laser welding." Licentiate thesis, Luleå tekniska universitet, 1995. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26605.
Повний текст джерелаGouveia, H. N. "The coupling mechanisms in the CO2 laser welding of copper." Thesis, Cranfield University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282175.
Повний текст джерелаGerber, G. F., and L. J. Barnard. "Designing for laser sintering." Journal for New Generation Sciences, Vol 6, Issue 2: Central University of Technology, Free State, Bloemfontein, 2008. http://hdl.handle.net/11462/504.
Повний текст джерелаUntil recently solid freeform fabrication (SFF) technology has been used mostly for production of prototype parts. However, as this technology matures, the initiative of utilising it for the manufacture of end-use products is establishing itself. As this tendency to use SFF for actual production runs increases, a demand is developing for sets of process-specific design for manufacture (DFM) guidelines that will assist designers who are designing parts for manufacture by a specific rapid manufacturing (RM) process. The purpose of this paper is to provideRMdesigners with such a series of processspecific design for manufacture guidelines.
Birt, Aaron M. "Materials & Machines: Simplifying the Mosaic of Modern Manufacturing." Digital WPI, 2017. https://digitalcommons.wpi.edu/etd-dissertations/542.
Повний текст джерелаPark, Jae-hyoung. "Process planning for laser chemical vapor deposition." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/18367.
Повний текст джерелаKarlin, Joseph H. (Joseph Howard). "3D imaging methods for manufacturing, with emphasis on the laser speckle technique." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/38074.
Повний текст джерелаGee, Kaitlyn Elizabeth. "Numerical tools for rate-cost-quality analysis of laser-based additive manufacturing." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127160.
Повний текст джерелаCataloged from the official PDF of thesis.
Includes bibliographical references (pages 81-84).
AM expands the design space in an unprecedented manner, as it can allow complex internal geometries, support multiple materials or structural gradients, significantly reduce lead times for small-batch production, and enable mass customization [1]. However, the adoption of AM in industry is hindered by our lack of design knowledge and inability to navigate the myriad considerations required to reliably produce high quality AM components economically. To quantitatively assess the tradeoffs between build rate, resolution and cost for AM processes, we present a physics-based rate and cost estimator for scanning laser based AM. The model takes a mesh representation of the part design as input, and uses a parametrized model of the rate-limiting physics of the build process to estimate the part-specific build time [2] [3]. From this build time estimate, per-part cost is calculated using a quantity-dependent activity-based model [4]. The model thus enables parametric analysis of tradeoffs between part quality (e.g., resolution), throughput, and cost. Additionally, we develop an analytical model to quantify the number of melting cycles the part undergoes during the print process as a metric of print quality. Integrated with our physics-based build time estimator, we articulate the tradeoff between build rate and print quality as a direct function of material properties, machine specifications, and print parameter selection. By conceptualizing and quantifying the relationships between part design, manufacturability, and cost, the computational design and decision-making tools developed here will enable optimal use of AM in real-world, production contexts. Given the complexity of designing for AM, these results produce valuable insight into otherwise complicated relationships between rate, cost and quality for SLM. For industry, this work will enable faster, cost-effective product production by identifying the most desirable print parameter sets.
by Kaitlyn Elizabeth Gee.
S.M.
S.M. Massachusetts Institute of Technology, Department of Mechanical Engineering
Yadroitsau, Ihar. "Direct manufacturing of 3D objects by selective laser melting of metal powders." Saint-Etienne, 2008. http://www.theses.fr/2008STET4006.
Повний текст джерелаL'objectif principal de la thèse de doctorat présentée dans ce mémoire est l'étude de l'interaction d'un faisceau laser de puissance avec des poudres métalliques. Le sujet est d'un grand intérêt scientifique par sa multidisciplinarité intégrant la métallurgie de poudres, la physique thermique, le transfert de chaleur et radiatif, la transformation de phases. En même temps, le sujet a une signification pratique considérable car la Fabrication Directe par fusion laser sélective des poudres (SLM) est une technologie émergente de fabrication d'objets 3D avec une grande valeur ajoutée et de pièces fonctionnelles complexes sur mesure. Une étude systématique a été réalisée sur les poudres actuellement utilisées dans la Fabrication Directe assistée par laser : Inox 316L (-25 µm), acier d'outillage H13 (-25 µm), Inconel 718 (-25 µm), CuNi10 (-25 µm), Ti grade 2 (-25 µm) et NiTi (-45 µm) ; Inox 904L (-16 µm et -7 µm), Inconel 625 (-16 µm), Co212F (CoCr, -31 µm). A partir de ces poudres, des objets plats 2D, des modèles 3D et des pièces fonctionnelles ont été fabriqués. Des recherches expérimentales approfondies sur l'interaction laser/matière sont effectuées, plus particulièrement sur l'interaction d'un faisceau laser de haute puissance mobile (0. 3-1. 3x106 W/cm²) avec un système complexe de poudres métalliques sur substrat métallique solide. Les stratégies de fabrication permettant d'obtenir la densité 100% de pièces résultantes sont identifiées. Les paramètres optimaux pour assurer la stabilité du procédé SLM sont définis
Attar, Hooyar. "Manufacturing and properties of titanium-based materials produced by selective laser melting." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2015. https://ro.ecu.edu.au/theses/1596.
Повний текст джерелаRanderee, Kasim. "Development of an integrated laser - based tool inspection system for a CNC machining centre." Thesis, University of Hull, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301631.
Повний текст джерелаMarkusson, Lisa. "Powder Characterization for Additive Manufacturing Processes." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62683.
Повний текст джерелаJamal, Naim Musa. "Finite element analysis of curl development in the selective laser sintering process." Thesis, University of Leeds, 2001. http://etheses.whiterose.ac.uk/304/.
Повний текст джерелаHussein, Ahmed Yussuf. "The development of lightweight cellular structures for metal additive manufacturing." Thesis, University of Exeter, 2013. http://hdl.handle.net/10871/15023.
Повний текст джерелаPocorni, Jetro. "Experimental and theoretical investigation of the laser cutting process." Licentiate thesis, Luleå tekniska universitet, Produkt- och produktionsutveckling, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26654.
Повний текст джерелаGodkänd; 2015; 20151012 (jetpoc); Nedanstående person kommer att hålla licentiatseminarium för avläggande av teknologie licentiatexamen. Namn: Jetro Pocorni Ämne: Produktionsutveckling/Manufacturing Systems Engineering Uppsats: Experimental and Theoretical Investigation of the Laser Cutting Process Third-cycle subject area: Manufacturing System Engineering Examinator: Professor Alexander Kaplan, Institutionen för teknikvetenskap och matematik, Avdelning: Produkt- och produktionsutveckling, Luleå tekniska universitet. Diskutant: PhD Ali Khan, TWI Ltd, Cambridge, UK Tid: Fredag 11 december, 2015 kl 09.30 Plats: E246, Luleå tekniska universitet
Wouters, Marc. "Hybrid laser-MIG welding : an investigation of geometrical considerations." Licentiate thesis, Luleå, 2005. http://epubl.luth.se/1402-1757/2005/82.
Повний текст джерелаWang, Dapeng. "High-resolution and large-area laser interference nanomanufacturing technology." Thesis, University of Bedfordshire, 2014. http://hdl.handle.net/10547/576431.
Повний текст джерелаGharbi, Myriam. "Etats de surface de pièces métalliques obtenues en Fabrication Directe par Projection Laser (FDPL) : compréhension physique et voies d’amélioration." Thesis, Paris, ENSAM, 2013. http://www.theses.fr/2013ENAM0026/document.
Повний текст джерелаThe process of direct manufacturing by projection laser ( FDPL), is a process of additive manufacturing which allows to make rooms(parts,plays) of complex shape directly from a file CAD, without tool and without mold(mussel). One of its major inconveniences is the bad quality of the states of surface obtained (Ra upper to 15 µm) which requires systematically stages of remanufacturing. In this context, and within the framework of the project ANR " aspect ", this thesis(theory) has for double objective a better understanding of the origin of the degraded states of surface, and the development of various innovative experimental solutions allowing to improve the states of surface. At first, by considering simple geometries (walls) in alloy of titanium Ti-6Al-4V, we studied the interaction
Yang, Jr-Syu. "Laser/optical fiber phased array generation of ultrasound for quality control of manufacturing processes." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/17286.
Повний текст джерелаFrancis, Zachary Ryan. "The Effects of Laser and Electron Beam Spot Size in Additive Manufacturing Processes." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/909.
Повний текст джерела