APPLICATION OF MULTI CRITERIA DECISION MAKING OF SETTING INPUT PROCESS PARAMETERS FOR DRILLED PRODUCT QUALITY OF Al Si7 Cu4

Apparently, the drilling geometry and treatment influence the drill operation and its performance. Factually, the performance given by the drill bit is powerfully associative with efficiency, hence with economical fabrication. As a further matter, typical performance indicator, that is deviation from diameter, Cylindricity, tool wear, surface roughness is have been changed by drilling geometry. This fact that stress needed for novelty in drill design with further performance indicator optimization for quality of hole. In that prospect, here new drilling geometries were used. Various Drilling trials stayed directed utilizing the L-9 orthogonal array. Various treatment processes like heat treatment, cryogenic or untreated (just as received) were carried out. Various tool nomenclature involving changing of helix angle were considered. The investigation performed on AlSi7Cu4 alloy with standard cutting tool, utilized all by trial made under dry cutting conditions. Later, drills were used to obtain hole on AlSi7Cu4, and their performance were examined and optimized to suggest optimum constraints of best attention. To estimate the performance of the drills, the drill quality of the hole stayed studied in terms of deviation of diameter, Cylindricity, and tool wear, surface roughness by the parameter optimization and the percentage of contribution were carried out by VIKOR methodology. As a result, geometry was developed by consideration of these negativities, and was found to show up superiority in performance when compared to other geometries in terms of quality of hole.