AN INVESTIGATION OF TOOL CONDITION MONITORING

摘要

In any manufacturing industry, machine tools play an important role in the production of parts. The dimensional accuracy and surface finish of the work piece depends mainly on the condition of the machine. The vibration signatures for different arrangement are recorded to determine the dynamic characteristics of the system, which include work piece, tool and lathe components. These vibration signatures are analyzed to determine causes of inaccuracy in the manufacturing process and faulty components. 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. Experimental vibration analyses are conducted for a lathe system to detect the possibility of faults and to develop accurate cutting process. Experiments are carried out using the condition monitoring instrument VIBROMETER to measure vibration severity for different cutting speed, depth of cut, feed rate. The value of vibration (rms and peak) at tool post and at bearing is determined from the experimental analyses, it is found that the vibration velocity increases at the cutting speed, depth of cut and feed rate increases.