Estudo de processo EDM: uma revisão dos principais parâmetros do processo

Abstract

This study investigated the effect of different cutting parameters and cutting fluids. Also analyzed the result of adding post in surface finish on the surface roughness of steel. The electro-discharge machining process uses thermal energy to remove material in which the melting and vaporization of the material forming the machined main mechanisms used for the generation of holes, grooves and cavities, generally small in materials with high hardness and low machinability. The electrode shape v profile corresponds to detail on the part to be obtained. The discharge sparks are produced by controlled pulse of direct current between the piece-work and the tool immersed in an ionised dielectric fluid. In a conventional EDM process, the machining time for the finishing operation is extremely superior to a thinning. Therefore, the time for finish machining operation is one of the most important problems in the process, with the addition of aluminum powder in the dielectric fluid it becomes much more efficient and capable of improving the machining time thus achieving a high level of finish for the same operation time as compared with conventional EDM. It was found from the results of experiments, the use of various types of powders, such as silicon (Si), aluminum (Al) and graphite (Gr), added to a hydrocarbon oil is very effective in order to achieve a fine finished in short machining time