Finish Milling
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. On the Machinability and Surface Finish of Superalloy GH909 Under Dry Cutting Conditions
GH 909 alloy is a kind of low thermal expansion superalloy with high strength and low expansion coefficient. It is mainly used for manufacturing of aero-engine turbine casings, sealing ring, vanes and other gap control parts, to improve the working efficiency and thrust of the engine as well as to reduce gas loss and fuel consumption. However, the machinabil
Mat. Res.. Publicado em: 21/05/2018
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2. Analysis of the cutting conditions influence on the finish of hardened steels using high speed milling / Análise da influência das condições de corte sobre o fresamento em acabamento de aços endurecidos usando altas velocidades
Normalmente, a utilização de aços ferramenta endurecidos, juntamente com as formas complexas típicas das peças utilizadas na área de moldes e matrizes, oferecem dificuldade na usinagem por fresamento, principalmente nas operações de acabamento que exijam o uso de ferramentas longas. A técnica de fresamento HSM (High Speed Machining - usinagem em alt
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/02/2012
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3. The influence of contact stress distribution and specific film thickness on the wear of spur gears during pitting tests
One of the main gear damage mechanisms is the formation of pitting and spalling on the tooth flank. Several factors have significant influence on the damage formation, such as: contact stress level; tooth profile type; relative contact speed; surface finish and lubrication conditions. This work comprehends the global observation of all such parameters and wa
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-06
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4. Modelling and analysis of cutting force and surface roughness in milling operation using TSK-type fuzzy rules
The present paper discusses on development of fuzzy rule based models (FRBMs) for predicting cutting force and surface roughness in milling operation. The models use TakagiSugeno-Kang-type (TSK-type) fuzzy rule to study the effect of four (input) cutting parameters (cutting speed, feed rate, radial depth of cut and axial depth of cut) on outputs (cutting for
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-03
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5. Contribuição para os usuários de sistemas CAD/CAM/CNC em operação de fresamento de topo em aço para moldes e matrizes / Contribution to the users of systems CAD/CAM/CNC in end milling operation in steel for molds and dies
The increased in the demand for plastic products and the need for reduction manufacturing times, and the growing dependence of man on the computer in present day, especially in manufacturing activities, has resulted in constant research of technological developments in order to supply these needs. In dies and molds manufacturing industry for plastic injectio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/06/2011
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6. Effects of milling condition on the surface integrity of hot forged steel
This paper presents a study on the influence of milling condition on workpiece surface integrity focusing on hardness and roughness. The experimental work was carried out on a CNC machining center considering roughing and finishing operations. A 25 mm diameter endmill with two cemented carbide inserts coated with TiN layer were used for end milling operation
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-03
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7. Influência do ângulo de posição sobre o fresamento frontal de níquel puro com insertos de metal duro
Nickel is considered as a dificult-to-cut material, due to rapidly work hardening when machined. Because it shows high strength at high temperatures it is widely used as high temperature alloys in aerospacial components and more specifically is applied in the continuous casting industry, in molds which consist of a copper sheet with pure nickel electroplated
Publicado em: 2008
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8. Fresamento de canais da liga de alumínio aeronáutico 7075-T7 / Slots milling of aeronautic aluminum 7075-T7
Todo projeto de fabricação por usinagem convencional tem como propósito uma peça acabada com dimensões ideais, cotadas com tolerâncias dimensionais. Quanto mais estreitas forem estas tolerâncias, maiores serão os tempos e os custos de fabricação. Para reduzir custos é interessante obter maior precisão e melhor acabamento com um único processo de
Publicado em: 2008
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9. Fresamento do aço vhsuper nos estados recozido e temperado com metal duro e cermet
The concept of costs reduction in all the industrial processes has been continually developed aiming to make companies more competitive. In the dies and moulds production chain this concern is not different. Usually, dies and moulds require long machining and polishing times, which represent from 60 to 80% of the production cost. This work aims to investigat
Publicado em: 2007
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10. A contribution to the face milling of irregular grey cast iron surface / Uma contribuição ao fresamento frontal de superficies irregulares de ferro fundido cinzento
A maior parte dos estudos sobre o processo de fresamento frontal aborda a usinagem de superfícies planas sem descontinuidades, o que na prática dificilmente acontece. Normalmente existem superfícies interrompidas com furos, superfícies estreitas que são usinadas com fresas de diâmetro grande, devido a uma pequena porção de largura maior, superfícies
Publicado em: 2006
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11. Toroidal milling of hardened SAE H13 steel
It is estimated that around 65% of the cost of a die or mould is related to the machining processes. Moreover, the literature says that 70% of the time spent in the machining processes of this kind of parts is used in finishing and semi-finishing operations. The high complexity of the machined surfaces makes mandatory the use of ball nose tools, with large o
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2004-03
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12. Influence of Cutting Conditions on Tool Life, Tool Wear and Surface Finish in the Face Milling Process
The main goal of this work is to study the influence of cutting conditions - cutting speed, feed velocity and feed per tooth - on tool life and surface finish of the workpiece in the face milling of flat surfaces. Aiming to achieve this goal, several milling experiments were carried out with different cutting speeds, feed velocities and feeds per tooth. In t
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2002-03