Vibration Analysis of Lathe Machine Tool

Abstract

Today, machine tools play a vital role in the production of parts in any manufacturing industry. The dimensional accuracy and surface finish of the work piece depends mainly on the condition of the machine. Vibration occurring on machine tools has been being a serious problem for engineers for many decades. Undesired relative vibrations between the tool and the work-piece jeopardize the quality of the machine surfaces during cutting.

Many Condition Monitoring Techniques are available to monitor the machine tool experimentally. Among these techniques, vibration monitoring is the most widely used technique because most of the failures in the machine tool could be due to increased vibration level.

In the present study, the vibration analysis of a lathe machine component has been investigated. The governing equation of motion of a lathe machine component is formulated using modal analysis approach. Given lathe machine tool is discretised into equivalent six lumped mass system which is having six degrees of freedom and the equivalent model is considered for the development of equation of motion of the machine tool. The natural frequencies and respective mode shapes are estimated using modal analysis. Furthermore, the displacement at each lumped mass is evaluated to investigate the transmission of steady state response to the machine tool. The precautionary measures are also suggested to reduce the transmission of the steady state response.