Robust modeling and optimization of borehole enlarging by helical milling of aluminum alloy Al7075

The paper aims to analyze the use of helical milling in hole enlargement in aluminum alloys, considering the effects of the input variables (tool overhang, cutting speed, axial and tangential feed per tooth) on the output ones related to the hole quality such as radial force, circularity and roughness. Additionally, the robust optimization is developed through the combination of robust parameter design, mean square error, and normal boundary...