Tool wear and burr formation during drilling of aluminum alloy 7075 in dry and with cutting fluid

Aluminum alloy 7075 (Al 7075) has been widely used in aerospace and automotive industries to replace heavier alloys. This is because of its superior properties high specific strength, corrosion resistance, good formability, recyclability low fabrication cost. However, the ductility heat generation during drilling Al often produces a burr at entrance exit workpiece surface. research investigates effect cutting speeds conditions on formation 7075. Drilling was performed dry with conventional fluid using 6.0 mm speed steel drills 22, 44 66 m/min constant feed rate 0.15 mm/rev. The use caused lower tool wear by 42%, 38% 30%, respectively, m/min, compared drilling. As for formation, average resulted 20% root width 10% height than all speeds. study indicated that beneficial as it least minimum formation.