Vibrations Characteristics Analysis of Rotor-Bearings System Due to Surface Defects Based in CNC Machines

Machine tools and Process industries extensively use roller contact bearings and sliding contact bearings. They are designed to take both radial load and axial load in different configurations. They can take high loads and take up misalignments in the assembly systems. The failure of the spherical roller bearing in the system can cause problems in quality of the product produced. Any downtime due to bearing failure must be reduced to minimum so as to increase the productivity through reduction of corrective and preventive maintenance of the system. Vibration analysis is a powerful technique used to predict the bearing failures. The failure of the inner race, outer race and rolling element defects are very common in rotary machines and analytical model is necessary to predict the failure. In this work proceeds of dimensional analysis are used to analyzes such defects. Various defects are artificially created using non-conventional machining processes. Experimental setup is also developed to find out the vibration behavior of the bearing with various kinds and sizes of the defects. It is found that there is a good correlation between experimental and theoretical model on the vibration behavior of the defective bearings