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Title Stability characterization of a turning process
Journal International journal of Engineering And Applied Science
Publisher Faculty of Engineering, Nnamdi Azikiwe University, Awka Nigeria.
Issue 9
ISSN 1119-8109
Pages 68 - 75
Subject Mechanical Engineering
Date of Publication January 2013

AUTHOR(S) C.G. Ozoegwu, Sam N.Omenyi

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_n=5700 rad⁄sec; damping factor, ξ=0.02; feed speed, v=0.0025m/sec and material cutting coefficient, C=3.5 ×〖10〗^7 Nm^((-7)/4). 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.


Keywords: Keywords: Chatter vibration, turning process, delay differential equation, machine tools, chatter suppression




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