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Rem: Revista Escola de Minas
Print version ISSN 0370-4467On-line version ISSN 1807-0353
ALVES, Manoel Cleber Sampaio; BIANCHI, Eduardo Carlos; AGUIAR, Paulo Roberto de and CATAI, Rodrigo Eduardo. Variable feed-rate influence on the final quality of metal grinding. Rem: Rev. Esc. Minas [online]. 2009, vol.62, n.1, pp.65-71. ISSN 0370-4467. http://dx.doi.org/10.1590/S0370-44672009000100010.
Grinding, the final stage of the machining process, employs a significant amount of cutting fluids for lubrication, cooling and swarf removal. However, these cutting fluids are extremely aggressive to the environment. With technological progress, the world tendency is to produce more and more sophisticated pieces,having a high degree of geometrical and dimensional tolerance, good surface finish, hlow cost and, mainly, insignificant impact on the environment. Therefore, recycling cutting fluids is intrinsic and cost-cutting for the grinding process and This work aimed to assess several output parameters in external cylindrical grinding: tangential force, acoustic emission, surface roughness, roundness, tool wear, and residual stress. Also, analysis of microstructural features through Scanning Electron Microscopy (SEM) was carried out. Tests was developed for ABNT D6 steel, using a CBN grinding wheel with vitrified bond and two types of cutting fluids Analyzing cutting fluid performance, grinding wheel time and feed rate, the best grinding conditions were found, leading to a decrease in cutting fluid volume and grinding time without impairing the geometrical and dimensional parameters, surface finish and surface integrity of the parts.
Keywords : ABNT D6; grinding; feed rate; roughness; surface roundness; machining; cutting fluid; minimum quantity of lubrication; surface integrity.