Wear And Tool Life
Mostrando 1-12 de 44 artigos, teses e dissertações.
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1. Investigation of borided layers contribution on the wear resistance and adhesion of TiN coatings
ABSTRACT The purpose of the investigation was to examine the possibility of improving tool life by reducing the wear effect and improving the adhesion of a thin film through a compound configuration that consists in boriding and PVD deposition. Single layer coatings of TiN were deposited by PVD (cathodic arc) on quenched and tempered and on borided powder me
Matéria (Rio J.). Publicado em: 02/05/2017
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2. Avaliação de diferentes ferramentas no torneamento da liga Inconel 713C / Evaluation of different tools in turning of Inconel 713C
The super alloy Inconel 713C is an alloy whose main element of its composition is nickel. The combination of high levels of this element and the structure of this material makes it very difficult to be transformed by the machining process. Because of this difficulty and lack of information about the machining of this material, the purpose of this study was t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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3. An analysis of the machinability of ASTM grades 2 and 3 austempered ductile iron
Austempered Ductile Iron (ADI) is a ferrous material that was first fabricated in the second half of last century, therefore a relatively new material compared to steel, which has been used for different applications by mankind for some millennia now. ADI ;s mechanical properties, such as its strength-to-weight ratio, which has proven to outperform that of f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/08/2011
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4. Fresamento com ar quente: uma proposta para minimizar a formação de trincas térmicas em ferramentas de metal duro
This work presents the results, analyses and conclusions about a study carried out with objective of minimizing the thermal cracks formation on cemented carbide inserts during face milling. The main focus of investigation was based on the observation that milling process is an interrupted machining process, which imposes cyclic thermal loads to the cutting t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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5. Desempenho de Ferramentas Reafiadas - Furação
The present work evaluated the performance of step drills, new and after regrinding. The way of regrinding the drills after they reached the end of tool life criterion was also varied. The following variables were also considered: type of coatings (uncoated, TiAlN e AlCrN) and the routine of re-coating them after regrinding (no recoating, recoating over the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/05/2011
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6. Manufatura flexível: comparativo entre o modelo otimizado e o tradicional. / Flexible manufacture: comparative degree between the optimized model and the traditional one.
This work aims to optimize the machining process by reducing setup time and adjusting the consumption of cutting tools in a flexible manufacturing scenario, adopting an optimized model, which is then confronted with the traditional model, to show the advantages of one over the another. The tests consisted in making the turning operation of thinning on a CNC
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/03/2011
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7. Performance of carbide and ceramic tools in the milling of compact graphite iron - CGI
Grey cast iron (GCI) is the most common material used in diesel engine blocks. However, to increase the pressures in the combustion chamber when this kind of alloy is used, it is necessary to increase the block wall thickness, what raises its weight and, consequently, does not fulfill the requirements. Thus, the compacted graphite iron (CGI) appears as an al
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
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8. Analysis of tool wear, surface roughness and cutting power in the turning process of compact graphite irons with different titanium content
Due to its good mechanical properties, the Compacted (Vermicular) graphite cast iron (CGI) has found a lot of applications in the automobilistic field. One of the applications is the production of high power diesel engine blocks that, due to the higher strength compared to the usual gray cast iron, allows the increase of the pressure inside the cylinder and,
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-09
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9. Estudo dos esforços de corte no processo HSM aplicado à abertura de cavidades / Study of the cutting forces in HSM process applied to pocket milling
The manufacturing of a great number of components in the industry depends on molds and dies used in processes like forging, powder metallurgy, deep drawing, casting and plastic injection. One of the main operations for manufacturing of these parts corresponds to the opening of the initial pocket, from which more complex geometries are machined in order to ob
Publicado em: 2010
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10. Influência do ciclo de füração na usinabilidade do ferro fundido cinzento GH190 / Influence of Cycle Drilling Machinability in Gray Cast Iron GH190
Dentre as operações de usinagem, a furação com brocas helicoidais destaca-se por ser uma das mais utilizadas na indústria metal-mecânica. Apesar de a literatura apresentar muitas pesquisas, percebe-se que ainda existe espaço para trabalhos científicos sobre o processo de furação. O presente trabalho analisa a influência do ciclo de furação (cont
Publicado em: 2010
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11. Burr produced on the drilling process as a function of tool wear and lubricant-coolant conditions
This work shows the resulting height and shape of the burrs produced by drilling holes with ratio L/D = 3. The tool used in the tests was the solid twist HSS drill coated with TiAlN, with diameter of 10 mm, to drill the microalloyed steel DIN 38MnS6. The height of the burr was studied under different lubricant/coolant systems, namely: dry machining, use of M
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-03
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12. Plastic deformation analysis of low-carbon steel due to metal hole punching using coated and uncoated tools
This paper presents subsurface hardening results of the low-carbon steel plate, deformed under industrial test conditions by punches manufactured in quenched and tempered AISI D2 steel, with and without TiN coating. The punches are 12º double shear angle shaped. A longer tool life was obtained in tools with TiN coatings applied by Physical Vapor Deposition
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-03