Cnc Machining
Mostrando 13-23 de 23 artigos, teses e dissertações.
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13. Design e materiais : contribuição ao estudo do processo de corte de ágata por jato d'água em formas complexas
No estado do Rio Grande do Sul, estão localizadas importantes regiões de extração e processamento do material gemológico ágata. No Distrito Mineiro do Salto do Jacuí encontram-se as maiores jazidas de ágata do Brasil e do Mundo. No município de Soledade se concentram as principais empresas de beneficiamento e comércio de materiais gemológicos. Ape
Publicado em: 2010
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14. Importância do binômio design e engenharia no beneficiamento de rejeito mineral de opala e ágata na produção de camafeus por usinagem CNC / Importância do binômio design e engenharia no beneficiamento de rejeito mineral de opala e ágata na produção de camafeus por usinagem CNC
No estado do Rio Grande do Sul, os garimpos de pedras preciosas estão distribuídos em duas regiões principais: no Distrito Mineiro de Ametista do Sul (maior produtor de ametista) e no Distrito Mineiro de Salto do Jacuí (maior produtor de ágata). Nestes dois distritos mineiros são explorados geodos, parcial ou totalmente preenchidos por camadas intercal
Publicado em: 2010
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15. 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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16. Effects of the machining in the surface integrity on the superaustenitic stainless steel / Efeitos da usinagem na integridade superficial de um aço inoxidavel superaustenitico
An investigation was made of the effects of the machining conditions employed in the turning operation on the surface integrity of ASTM A744 Grade CN3MN superaustenitic stainless steel. The main focus was the finishing operation, but studies were also carried out with a prior roughening operation. The main input variables in finishing were: tool rake angle,
Publicado em: 2008
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17. The behavior of graphite and copper electrodes on the finish die-sinking electrical discharge machining (EDM) of AISI P20 tool steel
The machining parameter settings installed at CNC EDM machines are developed under optimum process conditions. Standard workpiece and electrode materials are used traditionally by machine manufacturers to establish the EDM parameter settings. However, this is not the usual situation of the tooling industry, where many different grades of workpiece and tool e
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-12
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18. 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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19. Integrated monitoring and supervision architectures applied to machining process controlled by open CNC systems / Arquiteturas para monitoramento e supervisão integrados de processos de usinagem em máquinas com controle numérico aberto
Manufacturing enterprises require complete real time and accurate monitoring of machine tool data for integrating the shop floor with other company activities, as engineering, maintenance and business. It is acknowledged that monitoring systems capabilities are unavoidable to improve product quality, to reduce production time, and to the rapid adaptation in
Publicado em: 2007
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20. OtimizaÃÃo de processos de usinagem em uma cÃlula flexÃvel de manufatura
At the last years the globalization and the free international competition of the markets has been forcing the companies develop its products with larger quality in a smaller time of production and costs more and more low. The companies, in general, have been they adapt to that new reality as a form to guaranteeing its survival. For this they started to use
Publicado em: 2006
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21. 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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22. Desenvolvimento do compÃsito Al-5,0Si-1,0Cu/Al203 CaracterizaÃÃo microestrutural e trabalhabilidade
The development of the metal matrix composites (MMC) is considered one of the major innovations of materials in the last thirty years. These new materials are receiving great attention of the researchers in the entire world for diverse industrial applications because of their high mechanical strength, much superior than non-reinforced alloys. The factors tha
Publicado em: 2005
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23. Estudo das caracteristicas do fresotorneamento ortogonal radial aplicado em aço endurecido
The main goal of this work is to present the concepts and definitions of a combined machining process, so called radial orthogonal tummilling. The method of radial orthogonal turnrnilling was object of experimental analysis, through machining tests. Workpieces made of 42CrM04 steel with 60-61 HR.c hardness were machined. CBN inserts were used (some tests wit
Publicado em: 2001