Specific Cutting Energy
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. NUMERICAL MODELING OF ROCK CUTTING PROCESS FOR DRILLING OIL WELLS / MODELAGEM NUMÉRICA DO PROCESSO DE CORTE EM ROCHA PARA PERFURAÇÃO DE POÇOS DE PETRÓLEO
O mecanismo de corte em rocha é determinante na eficiência do processo de perfuração de poços de petróleo. Este mecanismo tem sido estudado através de ensaios de corte com um único cortador. Neste trabalho foram desenvolvidos modelos com o método dos elementos finitos para simular o processo de corte em rocha realizado por um cortador único. Este t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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2. Statistical analysis of acoustic emission signals generated during turning of a metal matrix composite
Acoustic emission technique (AET) has been used to monitor the progress of tool wear during turning of silicon carbide (20 wt.%) dispersed Al alloy metal matrix composite. Acoustic emission (AE) signals generated beyond a specific cutting distance increase abruptly. Statistical analysis based on assumed β distribution of AE energy showed that skewness and k
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-06
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3. 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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4. Efeito do tamanho do abrasivo no desgaste de metais. / The effect of abrasive size on the wear resistance of metallic materials.
In this research, the effect of abrasive size on the wear resistance of five metallic materials was investigated. Abrasive wear tests using a pin test on alumina paper were carried out using abrasive sizes between 16 µm and 192 µm. The wear surface of the specimens was examined by scanning electron microscopy for identifying the wear micromechanism and the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/06/2010
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5. nfluence of the woodworkability parameters of Eucalyptus sp. wood in specific energy consumption for cutting in circular saw / InfluÃncia dos parÃmetros de usinagem da madeira de Eucalyptus sp. no consumo de energia especÃfica de corte em serra circular
New technologies used in the cutting of Eucalyptus sp. for the carbonization continuous process require care. The choice of tool and cutting speeds and feed influence on reducing the time and cost of energy during processing, optimizing its production. The objective was to verify the influence of the woodworkability parameters on specific energy spent cuttin
Publicado em: 2009
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6. Avaliação de um sistema de plantio mecanizado de cana-de-açúcar / Evaluation of a mechanized plantation system of sugarcane
The mechanized plantation system has shown that it is more profitable and viable in an operational point of view than semi-mechanized plantation, that it banish lack of manual labor motivate principally for the mechanization of the harvest. The biometric parameters of the culture, the evaluation of the effective cost and the energy demand of the planters are
Publicado em: 2008
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7. MODELOS DE CRESCIMENTO DE QUATRO ESPÉCIES MADEIREIRAS DE FLORESTA DE VÁRZEA DA AMAZÔNIA CENTRAL POR MEIO DE MÉTODOS DENDROCRONOLÓGICOS
Timber harvesting is an important economic activity in nutrient-rich floodplain forests (várzea) of Central Amazonia. In the Western Amazon basin of Brazil and Peru, access to terra firme forests is restricted due to the absence of a road network. Still, 6090% of the local and regional markets are provided with timber obtained from the floodplain forests. C
Publicado em: 2008
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8. Evaluation of cutting fluids using scratch tests and turning process
This work demonstrates that scratch test techniques can be used to provide a quick and cost effective evaluation of cutting fluids. Apparent coefficient of friction and specific energy for the scratch steel samples under several lubrication conditions provides a good indicator of cutting fluid performance. This is followed by evaluation of the surface finish
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-12
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9. Influence of the tool edge geometry on specific cutting energy at high-speed cutting
This paper presents specific cutting energy measurements as a function of the cutting speed and tool cutting edge geometry. The experimental work was carried out on a vertical CNC machining center with 7,500 rpm spindle rotation and 7.5 kW power. Hardened steels ASTM H13 (50 HRC) were machined at conventional cutting speed and high-speed cutting (HSC). TiN c
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-09
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10. Studies on the cooling minimum quantity and conventional cooling at hardened steels in grinding process
The purpose of this work is to explain the concept of cutting fluids reasonable usage through the fluid minimum quantity in grinding processes. On that purpose, the development of a new nozzle and an own and adequate methodology should be required in order to obtain good results and compare them to the conventional methods. The analysis of the grinding wheel
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-06
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11. Estudo da geometria de arestas de corte aplicadas em usinagem com altas velocidades de corte / Study of cutting edge geometry applied in high speed machining
This thesis presents an experimental study about the specific cutting energy and its relation with cutting parameters, geometrical and tribological characteristics of tools, and workpiece material. Depth of cut, cutting speed, tool nose radius, chip-breaker geometry, tool coating, hardness, microstructure and chemical composition of the workpiece material ar
Publicado em: 2005
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12. Analysis of the influence of infeed rate and cutting fluid on cylindrical grinding processes using a conventional wheel
New worldwide trends such as globalization have rendered grinding processes increasingly important for industry, making it essential to perform in-depth studies of variations in grinding process parameters in the pursuit of greater cost effectiveness. This paper presents a comparative analysis of three different infeed rates, using a conventional grinding wh
Materials Research. Publicado em: 2004-09