Micro Machining
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. Estudio de los parámetros de proceso del anodizado por plasma químico en Ti-6Al-4V ELI para implantes dentales
ABSTRACT In order to study the variation effect of some parameters of micro-arc oxidation process (MAO) on Ti-6Al-4V samples for dental implants, several treatments were carried out under different conditions of current density, exposure time and electrolyte chemical composition. These processes resulted in generated bioactive titanium oxide surface coatings
Matéria (Rio J.). Publicado em: 19/07/2018
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2. The Influence of Twist Drill Main Cutting Edge Preparation in Drilling Process
In order to improve the performance of a twist drill, one must understand some aspects involved in drilling process that are not commonly addressed, such as the micro geometry employed in the tool’s tip sharpening and the protection of the main cutting edge. The edge of the twist drill can be protected by rounding, chamfering or the combination of both. Th
Mat. Res.. Publicado em: 17/11/2015
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3. Machinability study of steels in precision orthogonal cutting
The miniaturization of components and systems is advancing steadily in many areas of engineering. Consequently, micro-machining is becoming an important manufacture technology due to the increasing demand for miniaturized products in recent years. Precision machining aims the production of advanced components with high dimensional accuracy and acceptable sur
Materials Research. Publicado em: 03/07/2012
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4. Influência da topografia superficial na vida da matriz de forjamento a quente / Influence of the surface topography on the life of hot forging die
Vários produtos da indústria metalúrgica mundial são produzidos em regime de produção seriada, que utilizam matrizes em suas operações. Essas matrizes, por sua vez, contêm o perfil negativo do produto e, obviamente, é de interesse econômico que sua vida útil seja a maior possível. Porém, esta vida depende do ambiente ao qual o processo está in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
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5. Influence of optimized lubrication-cooling and minimum quantity lubrication on the cutting forces, on the geometric quality of the surfaces and on the micro-structural integrity of hardened steel parts
The is paper presents an analysis of the influence of minimum quantity lubrication (MQL), optimized and conventional cooling, using different cutting fluid volumes and flow rates, on the surface quality and integrity of hardened steel workpieces, in cylindrical plunge grinding with superabrasive CBN grinding wheels. The final quality of the workpieces were e
Matéria (Rio de Janeiro). Publicado em: 2011
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6. Desenvolvimento de um sistema opto-mecânico para micro usinagem com laser de femtosegundos / Development of an opto-mechanical system for micro machining with femtosecond laser
A usinagem de estruturas micrométricas pode ser feita com pulsos laser de nano, pico ou fentossegundos. Destes, porém, somente os mais curtos podem resultar em uma interação não térmica com a matéria, o que evita a fusão, formação de rebarba e zona afetada pelo calor. Devido à sua baixa potência média, contudo, a sua utilização na produção e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/06/2010
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7. Uma contribuição a melhoria do processo de fresamento de ferro fundido vermicular - CGI / A contribution to the improvement of the milling process machining compacted graphite iron - CGI
Since the beginning of this century, researches about the development of diesel engines have been intensified, aiming to increase its energy efficiency and to reduce the levels of emission of pollutants. One the way to increase this efficiency is to increase the peaks of pressure of fuel explosion in the combustion chamber. The grey casting iron material is
Publicado em: 2009
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8. Investigação sobr o uso da texturização a laser na preparação da superficie a ser recoberta em ferramentas de metal duro para fresamento / Research on the use of laser texturing for the surface preparation of to be coated carbide milling tools
Machining is one of the fundamental manufacturing processes of contemporary industry and coated cemented carbide is the most used cutting tool material. Manufacturing of this kind of tools includes the substrate surface processing previously to coating deposition in order to achieve high adhesion resistance in the substrate-coating interface. The most spread
Publicado em: 2009
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9. Eletroerosão por fio em metal duro para ferramentas de estampagem de lâminas de motores elétricos
The process of wire electrical discharge machining is currently used in manufacturing most hard metal (tungsten carbide) dies and punches, used in steel stamping tools for electric motors. The home appliance, industrial electric motor, transformer and hermetic compressor industries, use progressive stamping tools, justifying a better understanding of the man
Publicado em: 2008
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10. The use of vegetal-based dielectric fluids in die-sink EDM processes / Utilização de fluidos dielétricos à base de óleos vegetais na usinagem por descargas elétricas por penetração
Dielectric fluids usually used in electrical discharge machining (EDM) are generally expensive, toxic and demand special storage and disposal procedures. Oil-based dielectric fluids pollute the environment and are subject to the price variations of the international market. Moreover, they are used in large quantities and discarded after short periods of time
Publicado em: 2008
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11. Microeletronic pressure sensor based on the transversal piezoresistive effect in silicon / Sensor de pressão microeletronico baseado no efeito piezoresistivo transversal em silicio
This work describes a CMOS-Compatible multiterminal piezoresistive pressure sensor based on the transversal piezoresistive effect, which consists of a piezotransducer fabricated on a membrane. The layout of this piezoelement is designed in such a way that its sensitivity is improved by maximizing the effect of the mechanical stress over the equipotential lin
Publicado em: 2008
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12. Avaliação e critérios de eficiência nos processos de tratamento de fluido de corte por eletroflotação / Evaluation criteri and efficiency in the procedures for treatment of fluid cutting by eletroflotation
In the machining process cutting fluids are used to facilitate the manufacture of metal parts, which has resulted in problems of various orders, ranging from the generation of harmful effects on the desktop to the aggression of the environment with their improper disposal. The cutting fluids are composed of oils and minerals, synthetic solutions and water, c
Publicado em: 2008