Dimensional Tolerances
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Avaliação de desvio dimensional em Inconel 718 após a retificação em diferentes técnicas de lubri-refrigeração
RESUMO O Inconel 718 é uma liga à base de níquel que possui elevada resistência à fadiga e à fluência, ductilidade, rigidez, inércia química e capacidade de operar em elevadas temperaturas, por isto é bastante utilizada na fabricação de peças aeronáuticas de alto rendimento. Estas peças exigem tolerâncias dimensionais e geométricas estreitas
Matéria (Rio J.). Publicado em: 25/11/2019
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2. Residual stress analysis of drive shafts after induction hardening
Typically, for automotive shafts, shape distortion manifests itself in most cases after the induction hardening by an effect known as bending. The distortion results in a boost of costs, especially due to machining parts in the hardened state to fabricate its final tolerances. In the present study, residual stress measurements were carried out on automotive
Mat. Res.. Publicado em: 03/06/2014
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3. Tolerâncias dimensionais em conjuntos mecânicos: estudo e proposta para otimização. / Dimensional tolerances in mechanical assemblies: study and proposal for optimization.
Este trabalho aborda os conceitos necessários para o estudo de tolerâncias dimensionais de um conjunto mecânico e propõe um método eficaz para a especificação de tolerâncias na fase de detalhamento do projeto de um produto, através de um algoritmo de otimização baseado em custos de produção. Conceitos do custo da perda de qualidade desenvolvidos
Publicado em: 2010
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4. Application of the Minimum Quantity Lubrication (MQL) technique in the plunge cylindrical grinding operation
Precision cylindrical grinding is used extensively in the manufacture of precision components in the metal-mechanical industry in general. Modern CNC grinding machines have improved this process with respect to the positioning and rigidity of the machine-workpiece-tool system, allowing the production of high precision parts with low dimensional tolerances. B
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-03
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5. Desenvolvimento de um programa computacional para a integraÃÃo de dados de projeto, fabricaÃÃo e mediÃÃo de peÃas torneadas com Ãnfase na sÃntese de tolerÃncias dimensionais determinÃsticas
The objective of this work was to develop a computer program called Manufacturing Management System â SGF developed with the Excel language. This software integrates three stages: design, manufacturing by machining and measurement. So, itâs divided in three different and independent modules: design, manufacturing and measurement. In the design module is pr
Publicado em: 2009
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6. 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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7. InvestigaÃÃo do comportamento de ferramentas de aÃo-rÃpido no processo de rosqueamento interno em alta velocidade de corte / Investigation of the behaviour of high speed steel tools in tapping operation at high speed cutting
The main goal of this work is the evaluation of the performance of high-speed steel (HSS) taps when machining grey cast iron at high cutting speeds in dry conditions and when using MQL (minimal quantity of lubrication). The performance of four types of high speed steel with and without coating was investigated. They are: conventional HSS; HSS with addition o
Publicado em: 2006
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8. 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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9. Estudo das caracteristicas dos rebites solidos cabeça escareada a 120°, instalados com interferencia, no processo produtivo Embraer
The current riveting process of EMBRAER is not considered robust, but a process under statistical and previsible control. Some works were developed with success to guarantee the process stability, that nowadays it presents low rates of defects. However, due to the inherent variability to each flush hole operation, riveting and the order of magnitude of the t
Publicado em: 2002