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Relevant bibliographies by topics / Hard machining / Dissertations / Theses

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Dissertations / Theses on the topic 'Hard machining'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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1

Churi, Nikhil. "Rotary ultrasonic machining of hard-to-machine materials." Diss., Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/2509.

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2

Knuefermann, Markus M. W. "Machining surfaces of optical quality by hard turning." Thesis, Cranfield University, 2003. http://dspace.lib.cranfield.ac.uk/handle/1826/131.

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The main aim of this work was the machining by hard turning of surfaces with optical surface quality. A numerical target had been set as a surface roughness Ra = 10nm. It has been shown that achieving roughness of that magnitude by hard turning is possible. Individual work pieces exhibited the desired surface properties for short lengths at a time, but it proved to be very difficult to achieve these surfaces consistently and over longer cuts. The factors influencing the surface roughness were identified as tool defects and machine vibration in addition to the standard cutting parameters and ch

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3

Rashid, Waleed Bin. "Surface defect machining : a new approach for hard turning." Thesis, Heriot-Watt University, 2014. http://hdl.handle.net/10399/2840.

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Hard turning is emerging as a key technology to substitute conventional grinding processes, mainly on account of lower equipment cost, short setup time, and a reduced number of process steps. This is, however, being impeded by a number of challenges required to be resolved, including attainable surface roughness, surface deteriorations, surface residual stresses and metallurgical transformations on the machined steel surface (white layer). In this thesis, a novel approach named Surface Defect Machining (SDM) is proposed as a viable solution to resolve a large number of these issues and to impr

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4

Zhang, JingYing. "Process Optimization for Machining of Hardened Steels." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7248.

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Finish machining of hardened steel is receiving increasing attention as an alternative to the grinding process, because it offers comparable part finish, lower production cost, shorter cycle time, fewer process steps, higher flexibility and the elimination of environmentally hazardous cutting fluids. In order to demonstrate its economic viability, it is of particular importance to enable critical hard turning processes to run in optimal conditions based on specified objectives and practical constraints. In this dissertation, a scientific and systematic methodology to design the optimal tool g

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5

Pretorius, Cornelius. "Machining of titanium alloys with ultra-hard cutting tool materials." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4385/.

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This research explores the relative merits of existing and novel ultra-hard tool materials for finish turning titanium alloys. Phase 1 of the experimental work comprised evaluating the machinability of Ti-6Al-2Sn-4Zr-6Mo when employing carbide tooling with respect to tool life, wear behaviour, workpiece surface integrity and cutting forces. The machinability of Ti-6Al-2Sn-4Zr-6Mo using PCBN tooling was evaluated in Phase 2 experiments. It was shown that even with the use of high pressure jet cooling, carbide and low content PCBN grade inserts were unsuitable for high-speed (~200 m/min) finish

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Evans, R. "Focused ion beam machining of hard materials for micro engineering applications." Thesis, Cranfield University, 2009. http://dspace.lib.cranfield.ac.uk/handle/1826/4417.

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The Focused Ion Beam (FIB) milling of single crystal diamond was investigated and the beam drift and mill yield were quantified. The effect of water assistance on the milling of diamond was found to double the yield. The surface morphology that spontaneously forms during milling was measured and the mechanisms behind its formation investigated. The effect of gallium implantation on the diamond crystal structure was measured by x-ray diffraction. Chemical vapour deposited polycrystalline diamond (PCD) has been machined into micro scale turning tools using a combination of laser processing and F

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7

Aussaguel, Pierre. "A simplified finite element simulation for hard turning 52100 steel." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/19609.

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8

Ramesh, Anand. "Prediction of process-induced microstructural changes and residual stresses in orthogonal hard machining." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/18842.

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9

Kishawy, Hossam Eldeen A. "Chip formation and surface integrity in high speed machining of hardened steel /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0003/NQ42858.pdf.

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10

Smith, Stephen R. "An investigation into the effects of hard turning surface integrity on component service life." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17526.

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11

Al-Zkeri, Ibrahim Abdullah. "Finite element modeling of hard turning." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1181928433.

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12

Armitage, Kelly, and n/a. "Laser assisted machining of high chromium white cast-iron." Swinburne University of Technology, 2006. http://adt.lib.swin.edu.au./public/adt-VSWT20070214.155302.

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Laser-assisted machining has been considered as an alternative for difficult-to-machine materials such as metallic alloys and ceramics. Machining of some materials such as high chromium alloys and high strength steels is still a delicate and challenging task. Conventional machines or computer numerical control (CNC) machines and cutting tools cannot adapt easily to such materials and induce very high costs for operations of rough machining or finishing. If laser-assisted machining can be implemented successfully for such materials, it will offer several advantages over the traditional methods

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13

Kumar, Mukund. "Laser assisted micro milling of hard materials." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41213.

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This thesis presents an investigation of novel laser assisted micromachining processes that addresses the limitations of micromachining of hard-to-machine materials. Two different laser assisted approaches are used to machine hard metals and high strength ceramics. For hard metals, the basic approach involves localized thermal softening of the workpiece material by focusing a solid-state continuous wave near infra-red laser beam in front of the micro milling tool (end mills of 0.1 to 0.5 mm diameter). By suitably controlling the laser power, spot size and scan speed, it is possible to produce

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14

Singh, Ramesh K. "Laser Assisted Mechanical Micromachining of Hard-to-Machine Materials." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19803.

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There is growing demand for micro and meso scale devices with applications in the field of optics, semiconductor and bio-medical fields. In response to this demand, mechanical micro-cutting (e.g. micro-milling) is emerging as a viable alternative to lithography based micromachining techniques. Mechanical micromachining methods are capable of generating three-dimensional free-form surfaces to sub-micron level precision and micron level accuracies in a wide range of materials including common engineering alloys. However, certain factors limit the types of workpiece materials that can be process

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15

Kalyanasundaram, Dinesh. "Mechanics guided design of hybrid laser/waterjet system for machining hard and brittle materials." [Ames, Iowa : Iowa State University], 2009.

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16

Hsiao, Ya-Tsun. "In-process evaluation of tool wear effects on surface roughness variation in hard turning /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9904848.

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17

Hjertstedt, Johan. "Ytstrukturer och processer för hårdbearbetning av kugghjul och axlar." Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11262.

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<p>Detta examensarbete har utförts vid Linköpings universitet i samarbete med Scania Transmission i Södertälje och behandlar kravsättning av ytstrukturer samt processer för hårdbearbetning av kugghjul och axlar. Aktuella artikelritningar innefattar endast krav för Ra-värde, den aritmetiska medelavvikelsen för ytjämnhetsprofilen (R-profilen). Förslag på nya parametrar enligt av Scania tillämpade SS-EN ISO standards har tagits fram, detta för att ge en noggrannare beskrivning av vilken ytstruktur som skall uppnås. Resultatet är generellt tillämpningsbart men fokuseras mot kugghjulens hål, plan o

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18

Pacella, Manuela. "Pulsed laser ablation (PLA) of ultra-hard structures : generation of damage-tolerant freeform surfaces for advanced machining applications." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/27730/.

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The current methods for manufacturing super-abrasive elements result in a stochastic geometry of abrasives with random three-dimensional abrasive spatial locations. This thesis covers the laser generation of novel micro-cutting arrays in ultra-hard super-abrasive composites (e.g. polycrystalline diamond, PCD and polycrystalline cubic boron nitride, PCBN). Pulsed laser ablation (PLA) has been used to manufacture repeatable patterns of micro cutting/abrasive edges onto micro structurally different PCD/PCBN composites. The analysis on the influence of microstructural factors of the composite mate

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19

Raghavan, Satyanarayanan. "Laser-based hybrid process for machining hardened steels." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/47550.

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Cost-effective machining of hardened steel (>60 HRC) components such as a large wind turbine bearing poses a significant challenge. This thesis investigates a new laser tempering based hybrid turning approach to machine hardened AISI 52100 steel parts more efficiently and cost effectively. The approach consists of a two step process involving laser tempering of the hardened workpiece surface followed by conventional machining at higher material removal rates using lower cost ceramic tooling to efficiently cut the laser tempered material. The specific objectives of this work are to: (a) study t

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20

Jílek, Bohumil. "Výroba vstřikovací formy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228550.

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This thesis is focused on a production of injection molds. It contains some analyses of the various parts of the injection molds, a description of their functions and the possibility of structural design. A summary of existing technologies for the production of these molds, their advantages and disadvantages is included. This thesis deals with design of the component parts for injection of plastics, strategy of machining and a simulation of machining.

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21

Tropp, Pavel. "Vysokorychlostní obrábění ložisek z materiálu 100Cr6." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231982.

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This Master's thesis deals with the issue of high-speed turning of the 100Cr6 material. The aim is to identify and experimentally validate an innovative production process for a particular component. The thesis includes theoretical basis of high-speed machining, analysis of the current state of the manufacturing process, innovation design and experimental verification. At the end of the thesis, parameters of the machined surfaces of specimens are evaluated.

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22

Sousa, Taíse Azevedo de. "Usinagem de ferro fundido vermicular com ferramenta de corte à base de alumina magnésio /." Guaratinguetá, 2020. http://hdl.handle.net/11449/192492.

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Orientador: Marcos Valerio Ribeiro<br>Resumo: The development of new materials is extremely important, due to the need to obtain materials with good properties and low cost. There is a continuing need to improve tools for machining materials that have high strength at elevated temperatures that meet the vermicular cast iron. Small advances in the development of new tools could mean important aspects in the field of machining, in addition to making the market more competitive. The set of production and application of ceramic cutting tools in the machining processes of vermicular cast iron (GJV4

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23

Šenkýř, Pavel. "Trendy vývoje obráběcích strojů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228222.

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This diploma thesis deals with trends of the development of machine tools, and focuses on technologies and machine tools for manufacturing of pressing dies and on manufacturing of cavity of moulds. First, the existing state in the field of these technologies is described and defined, and subsequently, the dissertation concentrates on modern conceptions of this manufacturing.

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24

Araujo, Juliano Bezerra de. "Desenvolvimento de método de avaliação de desempenho de processos de manufatura considerando parâmetros de sustentabilidade." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/18/18140/tde-02032010-141958/.

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As empresas não mais podem pensar em desenvolvimento econômico sem a paralela preservação do meio-ambiente e do benefício mútuo da sociedade. É importante que as condições econômicas e sociais sejam melhoradas ao longo do tempo, sem exceder a capacidade de suporte do planeta. As indústrias podem contribuir para melhorar esse cenário aplicando uma gestão sustentável de manufatura, uma vez que estes são um dos principais agentes causadores de impactos. No entanto, para que consigam aprimorar a sustentabilidade de seus processos, é indispensável, antes de tudo, conhecer o seu real desempenho. O

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25

Bukáček, Zdeněk. "Technologie obrábění tvrdých materiálů nástroji s definovanou geometrií břitu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228640.

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This master’s thesis is concerned with subject matter hard machining with defined geometry edge tools. Aim master’s thesis is analysis and parameters evaluation machined surface at hard machining. This master’s thesis contain a characteristic of hard materials, used technology for cutting operation, but also tools and cutting conditions suitable for hard machining. In the conclusion are parameters evaluation machined surface the workpiece.

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26

Alves, Guilherme Carlos. "Estudo experimental de lubrificação e resfriamento no torneamento duro em componentes de grande porte." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18156/tde-11102017-140716/.

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Este trabalho teve como objetivo o estudo experimental de lubrificação e resfriamento no torneamento duro de uma superfície funcional em componentes de grande porte, com aplicação no chão de fábrica. Foram comparadas as técnicas de mínima quantidade de lubrificante e resfriamento abundante, utilizando o método de resposta de superfície. O planejamento tridimensional utilizado foi de dois níveis, adicionado de pontos axiais, ponto central e de réplica. Foram variados a velocidade periférica da peça, o avanço da ferramenta de usinagem e a profundidade de usinagem. Após a execução do experimento,

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27

Baizeau, Thomas. "Développements expérimentaux et numériques pour la caractérisation des champs cinématiques de la coupe de l’acier 100 CrMo 7 durci pour la prédiction de l’intégrité de surface." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0054/document.

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Aujourd'hui, les méthodes de corrélation d'images sont largement utilisées pour la caractérisation et le suivi temporel des essais mécaniques. Cependant dans le domaine de l'usinage, ces méthodes sont très peu employées pour l'étude en pointe d'outil de la coupe par manque d'accessibilité, de la faible taille de la zone observée et des fortes déformations dans la zone de coupe. Dans cette thèse, nous mettons en application la technique de corrélation d'images pour l'étude et la caractérisation des champs cinématiques induits dans la matière usinée, durant des essais de coupe conduits avec des

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28

Filípek, Timotej. "Obrábění těžkoobrobitelných materiálů dokončovacími technologiemi." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444264.

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The Master‘s thesis focuses on processing of hard-to-machine materials by the finishing machining methods. The first chapter comprises division and characteristics of finishing technologies in the field of machining processes. The chapter following includes division and characteristics of the hard-to-machine materials. The experimental part – another significant part of the thesis – is focused on grinding of mostly bearing rings made of hard-to-machine materials. The aim of the experimental part is to compare and subsequently assess the use of various kinds of grinding wheels in the grinding p

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Salazar, Carlos Eddy Valdéz. "Avaliação através da inspeção magnética da condição superficial de anéis de rolamento de aço DIN 100Cr6 após torneamento duro a seco." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-11052009-174233/.

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O presente trabalho visa apresentar informações que viabilizem a fabricação de componentes de rolamentos com limites superiores de resistência à fadiga, com a intenção de proporcionar uma vida útil maior ao rolamento, e, também, a otimização da fabricação das peças, dispensando em alguns casos o processo final e usual de retificação, o que implica uma redução de custos. As motivações deste estudo são a geração de altas tensões residuais compressivas no torneamento duro-seco a altas velocidades, a aplicação do RMB como técnica de medição das tensões residuais em aço 100CrMn6 e a otimização da q

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Klika, Jiří. "Ruční pracovní nářadí pro renovační účely." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378864.

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Diploma thesis deals with renovation of tractor Zetor 6911 with hand tool machining use. Theoretical part aims at historical evolution of machining and describes the hand tool machining methods. Renovation options include repair by a renovation company, yourself renovation and yourself renovation with cooperation in external company. Due to great renovation experience and technical knowledge is tractor chosen to be renovated by yourself. Complete machine renovation is very complex thus there are shown only specified examples of machine parts renovation. In the thesis there are in detail descri

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31

Nabhani, Farhad. "The performance of ultra-hard cutting tool materials in maching aerospace alloy TA48." Thesis, University of Hull, 1991. http://hydra.hull.ac.uk/resources/hull:4627.

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A study has been made of the respective performance of cubic boron nitride (CBN) and polycrystalline diamond (PCD) cutting tool materials and compared to various coated and uncoated tungsten carbide grades when cutting titanium alloy workpieces. Two important experimental techniques were employed during the course of this work, firstly a quasi-static contact method was employed to establish the workpiece/tool interfacial temperature above which strongly adherent layers may be formed. This technique revealed that the critical temperatures which marked adhesion and welding, were 740, 820 and 800

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32

Calamba, Katherine. "Phase stability and defect structures in (Ti1-x,Alx)Ny hard coatings." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0322.

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Cette étude met en évidence le rôle des lacunes d’azote et des défauts structuraux dans l’ingénierie de revêtements durs à stabilité de phase améliorée et dont les propriétés mécaniques sont compatibles avec des applications à haute température. Le nitrure de titane et d’aluminium (Ti,Al)N sous forme de revêtements est un matériau de choix pour la protection des outils de coupe pour métaux en raison de sa résistance supérieure à l’oxydation et à l’usure à haute température. La décomposition spinodale à haute température de la phase métastable cubique (Ti,Al)N en domaines cohérents de taille na

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33

CHAN, YI-CHU, and 詹易築. "Ultrasonic micro machining hard and brittle materials." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/88058944575226194193.

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碩士<br>國防大學中正理工學院<br>兵器系統工程研究所<br>90<br>Abstract Ultrasonic machining (UM) is considered to be a very effective and relatively accurate way to engrave fine patterns and drill holes on brittle materials. This study aimed to investigate the feasibility of utilizing UM technique to fabricate parts of brittle materials in micrometers scale. Although brittle fracture (micro chipping) is the dominant material removal mechanism involved in the m-UM process, poor surface roughness and deep penetrated cracks are the consequences if the machining parameters are not properly

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Tong, Guan-Min, and 童冠敏. "A Study on Machining Texture Applied to Machine Tool Hard Rail." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/12860368027647731596.

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碩士<br>國立中興大學<br>機械工程學系所<br>103<br>Hard rails are usually employed for feeding system of heavy load and heavy-duty machine tools. While hard rail requires lubrication on the contact surfaces scraping is applied to allow lubricant flow into the interface. However, the characteristics of such feeding system is hard to control because of the quality of manual scraping varies depending on the craftsmen’s skill as the technique is inherited between masters and apprentices. Previous studies have revealed that friction characteristics are can be improved micro-structure textures fabricated on the fric

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Nguyen, Huu-That, and 阮友真. "Dynamics of Machine Tool and Optimization of Machining Parameters in Hard Milling." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/v4e865.

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博士<br>國立高雄應用科技大學<br>機械工程系<br>105<br>Nowadays, in order to enhance performance and product quality in the mold and die manufacturing industry, the finishing grinding process is often replaced by a hard milling operation; this way, the product cycle time can be decreased, productivity increased, and the quality of finished products can be significantly improved. 　　In this study, an attempt is made to analyze the effect of process parameters on cutting force components, surface roughness and material removal rate (MRR) in the hard milling of SKD 61 steel based on a combination of the Taguchi meth

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MIN, LIN CHIEN, and 林建民. "Construction Technology of High Hard, High Brittleness of Tungsten via Wire Electrical Discharge Machining Process." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/08903125110470753860.

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碩士<br>明新科技大學<br>精密機電工程研究所<br>102<br>This study analyzed variation of metal removal rate, workpiece surface finish and depending on WEDM process parameters during manufacture of pure tungsten profiles. A hybrid method including Taguchi method and response surface methodology (RSM) are proposed to determine an optimal parameter setting of the WEDM process. The specimens are prepared under different WEDM process conditions based on a Taguchi orthogonal array table. The results of eighteen experimental runs were utilized to analyze the metal removal rate (MRR) and the roughness average (Ra) proper

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Guo, Jhe-liang, and 郭哲良. "Use of 5-Axis Machining Experiments to Study the Manufacturing Processes of Impeller with Very Hard Material." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/52297127273190481994.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>101<br>The applications for impellers in the aerospace industry and compressor industry are numerous. Its dimensional accuracy and processing efficiency are issues worthy of in depth research. This study uses five-axis machining experiments to perform an analysis concerning surface quality and processing performance of an impeller, material type SKD 61. During the experiments, feed rate, speed, and cut depth are used as variables, and this study finds the shortest time required for machining. Then, tool axis planning is performed to attain the objective of enhancing

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Parker, Grant. "Self-propelled rotary tool for turning difficult-to-cut materials." Thesis, 2011. http://hdl.handle.net/10155/249.

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Hard turning of difficult-to-cut materials is an economical method of machining components with high surface quality and mechanical performance. Conventionally in the machining industry, generating a component from raw goods includes a casting or forging process, rough machining, heat treatment to a desired hardness, and then finished-machining through a grinding process. Given the relative disadvantages of grinding, which include high specific energy consumption and low material removal rates, a newer technology has been introduced; hard turning. After the heat treatment of a cast part (gener

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Huang, Yao Yi, and 黃堯義. "The Determinants of Partnership between Customers and Suppliers: An Empirical Study of Taiwan Hand Tool Metal Machining Industry." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/xe4edw.

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碩士<br>東海大學<br>高階經營管理碩士在職專班<br>104<br>Taiwan metal hand tool industry development patterns already achieved stably mature. And the machining costs will be influence by customers and enterprise as well as supplier cooperate partnership models This study aims to research what factors affect the following Taiwan formed up-down stream metal machining processing partnerships? First, If the nature of customer's strategy policy (low-cost strategy and variation strategy) influence customers and suppliers partnership? Second, If the nature of the transaction (exclusive asset, transaction frequency, unc

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Guimarães, Bruno Miguel Pereira. "Produção e caracterização de ferramentas de corte obtidas por tecnologia laser." Master's thesis, 2018. http://hdl.handle.net/1822/74205.

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Dissertação de Mestrado (Ciclo de Estudos Integrados Conducentes ao Grau de Mestre em Engenharia de Materiais)<br>A indústria das ferramentas de corte enfrenta atualmente grandes desafios uma vez que nos últimos anos, novos materiais com elevada dureza e baixa condutividade térmica estão, cada vez mais, a ser utilizados. Este panorama leva a que seja necessário desenvolver novas soluções usando materiais e processos de fabrico inovadores. A baixa condutividade térmica destes materiais resulta num rápido aumento da temperatura na zona de corte durante o processo de maquinagem induzindo as

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