IMPROVEMENTS ON BURR SIZE AND SURFACE ROUGHNESS THROUGH A COMPARATIVE STUDY ON DRILLING A METAL MATRIX COMPOSITE AND A HIGH ALLOYED STEEL

摘要

Ultrasonic as an assistance has gained broad interest in plenty of production methods as well as drilling procedure. Using high abrasive material with soft matrix causes bad finished surface and exterior burr in end of drilled hole. The effect of ultrasonic vibration on surface roughness and burr size in two different abrasive materials is investigated. To this end, two materials Al/SiCp metal matrix composite and high-alloyed steel X20Cr13 are chosen. To be more precise, the vibrations are imposed to the workpiece. The effect of vibration, spindle speed and feed rate on burr size and surface roughness are studied. Carbide drill tool with diameter of 5 mm is used in this study. The results considerately showed that ultrasonic vibration improve hole quality compared to conventional drilling.