Stability characterization of a turning process

Abstract

It will always be the desire of the machinist to simultaneously meet the two opposed demands: achieving high productivity
and high surface quality. It is seen from this work that the extent to which these two demands are considered opposed
depends on the machines stability information at the disposal of the machinist. The parameters adopted for the turning
process considered are as follows; mass, m = 0.0431kg; Natural frequency, ω = 5700 radsec ; damping factor, ξ =
0.02; feed speed, v = 0.0025m/sec and material cutting coefficient, C = 3.5 × 10Nm
. Stability chart was constructed
from which a number of comments and recommendations were made. It was seen from the stability chart that the machine
would have very low productivity at low spindle speed requiring very small dept of cut for stable operation. For example at a
spindle speed of 2000rpm the maximum depth of cut for stable operation would be about 0.25mm. This result points to the
need of chatter stability enhancement for low speed range turning machine through any means of chatter suppression.