Machine Tools
Mostrando 13-24 de 107 artigos, teses e dissertações.
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13. Design of a computer aided quick-stop device for study of dead metal zone formation
The use of quick-stop device allows observing a sequence of frozen images focused on the chip formation area when machining in orthogonal turning tests. This work records the development of a quick-stop device employing a servo motor. The present invention relates generally to a quick stop device, for combination with a cutting machine that is able to abrupt
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-12
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14. Influence of a diagonal pre-drilled hole on hole quality during the reaming process using multiblade tools
The requirements of production engineering for a precision hole are to ensure the required quality as well as minimal production costs. The interactions between machine, tool and the pre-drilled hole result in uncertainties during the final reaming process. For this purpose the reaming process itself and the appearance of process faults were focused in a lar
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
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15. Leitura, tradução e medidas de complexidade textual em contos da literatura para leitores com letramento básico
This work analyzes textual complexity and readability patterns from a computational perspective, situating the problem through the description of original and translated texts, based on Translation Studies, Corpus Linguistics and Natural Language Processing theoretical postulates. We investigated the hypothesis that there are English literature translations
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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16. Application of computer graphics in facial reconstruction for recognition: a case study / Aplicação da computação gráfica na reconstrução de face para reconhecimento: um estudo de caso
The facial reconstruction, also known as facial approximation, is performed for centuries by forensic medicine professionals and anthropological areas researchers. In the forensic medicine, for example, it is used when there is no evidence that allows the identification of the individual by considered accurate means, such as DNA testing or dental records. Th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/09/2011
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17. Planejamento de trajetórias e implementação de técnicas de posicionamento de eixos para dispositivo CNC com arquitetura de controle aberta / Trajectory planning and implementation of axes positioning techniques for CNC device with open control architecture
Máquinas-ferramenta CNC são dispositivos complexos que executam movimentos automáticos, precisos e consistentes. Com o propósito de aprimorar o desempenho destes dispositivos face às mudanças bruscas de parâmetros agregados a posição, velocidade e aceleração no decurso de determinada trajetória torna-se imprescindível o estudo de novas arquitetu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
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18. Distúrbios osteomusculares relacionados ao trabalho de operadores da colheita florestal mecanizada / Work-related musculoskeletal disorders of operators of mechanized harvesting
The Repetitive Strain Injury / Work Related Musculoskeletal Disorders (LER / DORT) can arise in any field of activity; just there is a causal factor, ie, functions and jobs that expose workers to risk factors. These risk factors are present in the operator of the harvesting machinery activities. Throughout the workday upper limbs are highly required, necessi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/07/2011
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19. An Investigation into the Use of Industrial Robots for Machining Soft and Low Density Materials with HSM Technique
The needs to comply with an increasingly competitive international market lead industries to some innovative solutions, such as the use of robotic arms as machine tools. Although these solutions present some well known drawbacks, there are some advantages and niches of application where success is possible. The present work investigates the use of such piece
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-09
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20. Análise dos deslocamentos térmicos de eixo-árvores de máquinas-ferramenta em altas rotações / ANALYSIS OF MECHANICAL AND THERMAL DISPLACEMENTS IN HIGH SPEED MACHINE TOOL SPINDLES
Machine tools play a key role in modern industrial production; therefore the technological development of machine tool industry has grown over the past decades. High Speed Machining (HSM) is widely used for machining complex and free form surfaces with high geometrical and dimensional accuracy. The spindle is one of the main items of a machine tool. Thus, it
Publicado em: 2011
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21. Análise de processo e aplicação das ferramentas da qualidade para aumentar eficiência de uma sopradora de garrafas pet / Analysis of process and application of the quality tools to increase efficiency of a pet bottle blowing machine
Este trabalho analisa o processo de uma Sopradora que tem a função de sopragem de garrafas PET para serem utilizadas em uma Linha de envase de refrigerantes. Através dessa análise procura-se relacionar às paradas por falha e quebra do equipamento com os seus resultados de eficiência. A partir da coleta dos dados parte-se para uma sequência de etapas p
Publicado em: 2010
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22. Evaluation of machine learning classifiers in keratoconus detection from orbscan II examinations
PURPOSE: To evaluate the performance of support vector machine, multi-layer perceptron and radial basis function neural network as auxiliary tools to identify keratoconus from Orbscan II maps. METHODS: A total of 318 maps were selected and classified into four categories: normal (n = 172), astigmatism (n = 89), keratoconus (n = 46) and photorefractive kerate
Clinics. Publicado em: 2010
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23. Uso de herramientas de mejoramiento y su incidencia en costos, fallas y factores de éxito de grandes y medianas empresas industriales del Valle de Aburrá
This paper describes the use of several improvement tools and benefit levels obtained in production processes in large and medium-sized enterprises of the Metropolitan Area of Medellín (Aburrá Valley). The impact on organizational factors such as quality cost, machine failure, planning, and scheduling failure, as well success factors, were analyzed. This s
Gestão & Produção. Publicado em: 2010
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24. Characterization and exploitation of piston ring chips in the rectification process a new recycling proposal
The rough grind machine operation in metallic material produce a sub product with the followings components such as: metallic residue, small parts come from the resin grinds, diatomaceous earth material (filter material) and soluble oil in water for tools cooling. According [HU1UH] from ABNT, this sub product is toxic, not inert material, aggress the environ
Matéria (Rio de Janeiro). Publicado em: 2010