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Compara??o entre os métodos de aplica??o de fluido de corte convencional e otimizado na retifica??o plana de ceramicas
Iceri, D. M.;Sousa, R. M. e;Destro, R. S.;Oikawa, M. H.;Bianchi, E. C.;Aguiar, P. R. de;Fortulan, C. A.;
Ceramica , 2012, DOI: 10.1590/S0366-69132012000100014
Abstract: the great technological growth and the improvement needs, a material that has gained a wide range in mechanical engineering is the ceramics because of its advantages beyond steel, having chemical and mechanical better properties. however, its machining is a difficult and delicate process, which requires a careful attention to their study. moreover, the grinding process is one of the methods which is producing good results but, there is a big problem around this, which is the excessive use of cutting fluids that becomes a global concern, since this fluids generate serious social and environmental problems, causing, in this way, a great interest in research on alternative methods to reduce consumption and improve the performance of cutting fluid used. this work aims to compare two techniques of lubrification and cooling in the grinding process, the conventional and the optimized methods. the second one is an option to decrease the volume of fluid used, using the application principle of a smaller amount of cutting fluid applying locally a high speed flow, obtaining environmental and socioeconomic benefits. the analysis of the work will be done based on the evaluation of the output variables of the flat grinding process such as the behavior of the roughness and grinding wheel wear, whereas they can evaluate the process making a relationship between part quality versus cost. with this analysis, we intend to evaluate if the optimized method is a viable substitute to conventional method in the flat grinding process.
Retifica??o de ceramica de alumina relacionada com diferentes técnicas de lubri-refrigera??o: convencional e mínima quantidade de lubrifica??o
Sousa, R. M. e;Iceri, D. M.;Destro, R. S.;Oikawa, M. H.;Bianchi, E. C.;Aguiar, P. R. de;Fortulan, C. A.;
Ceramica , 2011, DOI: 10.1590/S0366-69132011000100010
Abstract: nowadays, environmental concerns are causing companies to seek reduce the environmental impacts caused by them, while improving product quality and manufacturing processes. therefore, much research is being developed in the machining area to examine the actual damage to the environment by utilizing different methods of lubrification and cooling. this study aimed to analyze the surface roughness of the machined part and the wear of the grinding wheel in the flat grinding of alumina ceramics with two methods of cooling-lubrification: the conventional method with a flow rate of 27.5 l/min and the method of the minimum quantity of lubrification (mql) at 100 ml/h. with the obtained results it's possible to say that, for the same machining parameters of mql and conventional techniques, the mql technique used a much smaller amount of fluid and assured good results for the diametral wear of the grinding wheel. however, the superficial roughness of the piece was worse for the mql method than the conventional cooling technique. these results showed that using alternative forms of lubrification to reduce the use of cutting fluid are possible, depending on which factors are most important to the process that is wanted. accordingly, if the mql technique was used, it would surely bring, on one hand, the benefits of the reduction of the problems of recycling and disposal the cutting fluid, but on the other hand, leads to a lower surface quality of the parts.
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