Experimental and numerical study of ultrasonically-assisted drilling

چکیده مقاله

In this study, 3D finite element simulation of ultrasonically- assisted drilling is carried out to analyze the effect of ultrasonic vibratio ns on common difficulties existed in conventional drilling. Influence of har- monic movement of drill bit on the formation of built-up edge is experimen tally evaluated and also dis- cussed by investigation of heat generation on the tool faces in simulation . At the end, it was revealed that intermittent movement of drill bit in vibratio n method causes the total time of heat transfer between workpiece and drill bit to be reduced resulting lower built-up edge formation comp ared to conventional drilling. Moreover, linear motion of cutting tool in the feed direction results in the increase of chip strain and consequently damage value which causes to generation of broken chips.