Precision Lifetime Analysis and Grey Prediction Based on Observation Data for Motorized Spindle

Abstract

The stoppage and lifetime of high speed motorized spindle was related to many influence. A total of 31 statistical lifetime data of imported motorized spindles in cylinder head production line were presented, according to these data, and the average cut operation lifetime could reach 8277 hours, and the 8000 hours of average design precision lifetime was validated. It was found that the main influencing factors of motorized spindle lifetime in initial stage were the original manufacturing defects, also in precision lifetime stage and fatigue lifetime stage, the main influencing factors were the service conditions which exceeded design allowable conditions and own unique structural characteristics of motorized spindle respectively. according to 7 data and GM(1,1) grey theory, the precision lifetime prediction model of motorized spindle was built and the. model error was tested. The reliability of prediction model is validated by 2 inchoate reality observation data which relative differences were 0.57% and 2.03% respectively.