Dynamic cutting and vibration tests on nimonic bars

Abstract

The use of Nimonicalloys in industry to meet more stringent specifications has resulted in an increasing number of machine tool vibration problems. Production engineers are aware that vibration during machining leads to shorter tool life and poorer surface finish. Experimental work to investigate the tool wear , surface finish and dynamic characteristics of Nimonic bars has been carried out. The work was comprised of vibration tests , machining tests and analysis of tool point vibration recordings . Results show that crater wear on the cutting tool is predominant and that surface finis hand tool life are affected by a change in workpiece stiffness . Tool point vibrations occur at a frequency well below the natural frequencies of the work piece and cutting tool.