The spindle of remaining lifetime predicted in the failure machine tool

This paper mainly carries out researches on the small part samples of the spindles. Through the Weibull distribution and least squares,the mathematical analysis has made on the lifetime of the spindle parts of the retired machine tool. Through using MATLAB simulation, the theoretical life of the spindle parts is obtained. Then, the motion analysis was made on the old and retired machine tool spindle. At the same time,the finite element model of the spindle is set up with the support of the software ABAQUS. Besides, the static analysis and meshing are conducted to obtain the corresponding stress strain simulation results. Also,the analysis data are imported into the fatigue analysis software NCODE to make the life prediction.Through loading on the old machine tool, the corresponding cloud lifetime chart and damage cloud chart are obtained. The readings of the cloud chart are calculated to obtain the life expectancy which the spindle lifetime can reach and the spindle can be re-manufactured, conforming to the theory analysis results of the Weibull distribution as well as the method of least square.It proves that the method is feasible.