Assessment of Load-Dependent and Condition-Oriented Methods for the Lifetime Estimation of Ball Screws

摘要

Taking into consideration the complexity of today's machines an economical production is only possible if high availability is ensured at the same time. In order to be able to guarantee high availability values the maintenance of machine tools plays a key role. Thus, an approach is developed which permits the configuration of both a diagnostic and a forecast system for ball screws. Therefore, a hybrid approach is established which combines load-dependent and condition-oriented methods. The objective is to be able to make a forecast as precisely as possible of the failure of a ball screw with a minimum of effort. In the process, basic assessment criteria are in each case effort and prediction accuracy. Therefore, the results of the preciseness of condition determination are presented by the features solid-borne and airborne sound in this paper. The results of the accuracy of load determination are presented by the motor current.