Wear And Tool Life
Mostrando 13-24 de 44 artigos, teses e dissertações.
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13. Influencia do teor de titanio no torneamento do ferro fundido vermicular / Influence of the titanium content in the turning of compacted graphite iron
Due to its good mechanical properties, the compacted (vermicular) graphite 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, cons
Publicado em: 2009
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14. Study of laser textured and coated cutting tools used in face milling of compacted graphite cast iron / Estudo da caracterização de ferramentas de corte texturizadas a laser e revestidas utilizadas no fresamento frontal de ferro fundido vermicular
The controlled alteration of a surface can improve the performance of a mechanical part. The texture is the digital impression of a surface composed of hills and cavities, normally disordered distributed. When this texture is uniform and regularly distributed on a surface, it can modify significantly the functionality of a component. A technique used to unif
Publicado em: 2009
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15. Uma contribuição a melhoria do processo de fresamento de ferro fundido vermicular - CGI / A contribution to the improvement of the milling process machining compacted graphite iron - CGI
Since the beginning of this century, researches about the development of diesel engines have been intensified, aiming to increase its energy efficiency and to reduce the levels of emission of pollutants. One the way to increase this efficiency is to increase the peaks of pressure of fuel explosion in the combustion chamber. The grey casting iron material is
Publicado em: 2009
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16. Investigação sobr o uso da texturização a laser na preparação da superficie a ser recoberta em ferramentas de metal duro para fresamento / Research on the use of laser texturing for the surface preparation of to be coated carbide milling tools
Machining is one of the fundamental manufacturing processes of contemporary industry and coated cemented carbide is the most used cutting tool material. Manufacturing of this kind of tools includes the substrate surface processing previously to coating deposition in order to achieve high adhesion resistance in the substrate-coating interface. The most spread
Publicado em: 2009
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17. Estudo da usinabilidade dos ferros fundidos cinzentos ligados (CrCuSn e CrCuSnMo) e vermicular classe 350 no fresamento frontal em alta velocidade de corte
Cast iron is used to manufacture engine blocks due to its mechanical and physical properties like thermal conductivity and dumpy capacity, which are fundamental to these applications. Compacted graphite iron (CGI) has higher mechanical strength compared to gray cast iron and can be a great advantage in these type of mechanical parts. The compression rate can
Publicado em: 2009
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18. Análise do Efeito da Seqüência de Arestas e do Número de Interrupções para Medir Desgaste na Vida da Ferramenta no Torneamento / Analysis of the Effect of the Sequence of Edges and Number of Interruptions to Measure Wear on Tool Life in Turning
Especialistas em usinagem se deparam com uma questão na utilização de insertos intercambiáveis: a utilização de uma aresta do inserto afeta o desempenho das demais arestas? Alguns desses especialistas afirmam que, em ferramentas quadradas, por exemplo, a seqüência das arestas utilizadas pode afetar o resultado final do teste de vida. A justificativa
Publicado em: 2009
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19. Furação de ferros fundidos austemperados e nodular perlítico / Machinability of Austempered Ductile Irons and Pearlitic Ductile Iron in Drilling Process
Many materials have mechanical proprieties improved by heat treatments, but this can cause changes in the structure of the material, worsening its machinability, as in the case of austempered ductile iron (ADI) that despite of presenting better mechanical proprieties it has lower machinability when compared with the conventional ductile iron and steel of sim
Publicado em: 2009
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20. Life Twist Drills Used in Implantodology and Influence of the Cutting Conditions / Determinação da vida de brocas utilizadas em implantodontia e influência das condições de corte
O objetivo deste trabalho é determinar a vida de brocas para implantodontia através de furação em tíbia bovina e estudar a influência das condições de corte utilizadas. As variáveis de entrada do trabalho foram o material de ferramenta, a velocidade de avanço e a rotação. E as variáveis de saída monitoradas foram o número de furos realizados,
Publicado em: 2009
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21. Tool wear damage caused by abundant emulsion in milling operation of PH stainless steel
The use of cutting fluid in milling operations causes increase of temperature variation on the tool and may cause decrease of tool life. However, sometimes its use is necessary due to possible deleterious influence the temperature increase may have on the workpiece. Therefore, it is important to make fluid less harmful for the tool. In this work, two alterna
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-06
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22. Turning hardened steel using coated carbide at high cutting speeds
The present work studies some aspects of the turning process applied on hardened steel using multilayer coated carbide tools at high cutting speeds. The influence of cutting parameters (vc, f, and depth of cut - d.o.c.) on tool temperature, tool wear, cutting forces, and surface roughness were analyzed. The current literature reports many studies using PcBN
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-06
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23. 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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24. Evaluation through the mgnetic inspection of the superficial condition of steel bearing rings DIN 100Cr6 after hard and dry turning. / Avaliação através da inspeção magnética da condição superficial de anéis de rolamento de aço DIN 100Cr6 após torneamento duro a seco.
The present work presents information for the manufacturing of ball bearings components with higher limits of resistance to fatigue, enabling a longer useful life and also the optimization of the production of the pieces, making the usual and final process of grinding unnecessary, which would result in a costs reduction. The motivations of this study are the
Publicado em: 2008