Single Point Diamond Turning
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Single point diamond turning of the tungsten carbide / Usinabilidade do carbeto de tungstênio no torneamento com ferramenta de diamante
The single point diamond turning of the Tungsten Carbide is presented. The motivation for this study is the material´s high hardness and potential application for micromolds. A Tungsten Carbide sample was subjected to tests for determination of cutting parameters to achieve the ductile regime of material removal. Based on experimental results it was conclud
Publicado em: 2009
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2. In-situ raman spectroscopy analysis of re-crystallization annealing of diamond turned silicon crystal
Mechanical material removal during ultraprecision machining of semiconductors crystals normally induces surface damage. In this article, Raman micro-spectroscopy has been used to probe structural alteration as well as residual stresses in the machined surface generated by single point diamond turning. The damage found is characterized by an amorphous phase i
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-03
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3. Avaliação da replicagem de moldes torneados com ferramenta de diamante usando prensagem a quente em polimetilmetacrilato (PMMA) / Evaluation of the replication of molds generated from single point diamond turning using hot embossing in polymethylmethacrylate (PMMA)
In this work, different types of microstructures were generated by single point diamond turning and microindentation for will replicated through the hot embossing. Tests were carried to evaluate the generation these microstructures by two distinct methods: micro-deformation and micro-machining, planned to observe the replication of the mark generated by the
Publicado em: 2006
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4. Avaliação da integridade superficial do polimetilmetacrilato (PMMA) no torneamento com ferramenta de diamante / Evaluation of the surface integrity of polymethymethacrylate (PMMA) in diamond turning tool
O torneamento com ferramenta de diamante é um processo de fabricação usado para a produção de componentes ópticos com alta precisão de forma e qualidade óptica final. O crescente uso de materiais poliméricos na industria, particularmente em equipamentos de precisão eletrônica e óptica tem exigido o estudo e entendimento de suas características e
Publicado em: 2006
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5. Multiple phase silicon in submicrometer chips removed by diamond turning
Continuous chips removed by single point diamond turning of single crystal silicon have been investigated by means of Scanning Electron Microscopy/Transmission Electron Microscopy and micro-Raman Spectroscopy. Three different chip structures were probed with the use of electron diffraction pattern: (i) totally amorphous lamellar structure, (ii) amorphous str
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-12
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6. Characterization of structural alteration in diamond turned silicon crystal by means of micro raman spectroscopy and transmission electron microscopy
In this work, (100) oriented monocrystalline silicon samples were single point diamond turned under conditions that led to a ductile and brittle regime. Raman spectroscopy results showed that the ductile regime diamond turning of silicon surfaces induced amorphization and, on the contrary, in the brittle mode machining condition this amorphous layer does not
Materials Research. Publicado em: 2005-09
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7. Micromachinability study of Ti (CP) and Ti-6Al-4V alloy by means of single point diamond turning / Estudo da microusinabilidade do Ti (CP) e da liga Ti-6Al-4V no torneamento com ferramenta de diamante
Among the various applications where titanium and its alloys are employed, the aeronautic industry is one of the most important, because of their excellent properties such as fracture strength, corrosion resistance and high strength to weight ratio, which is maintained at high temperatures. However, the machinability of titanium and its alloys is generally c
Publicado em: 2005
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8. Investigation on diamond turning of silicon crystal - generation mechanism of surface cut with worn tool
This paper discusses the effect of tool wear on surface finish in single-point diamond turning of single crystal silicon. The morphology and topography of the machined surface clearly show the type of cutting edge wear reproduced onto the cutting grooves. Scanning electron microscopy is used in order to correlate the cutting edge damage and microtopography f
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2001