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In the last decade, reliability improvement warranties (RIW) became increasingly popular with customers of machine tool manufacturers especially in the automotive industry. These RIWs include long term warranties (for up to 10 years) for reliability figures like the Mean Time Between Failure (MTBF). The long warranty period, the stochastic nature of reliability, unknown operational conditions and...
This paper presents an approach to the dynamic optimization of the preventive maintenance schedule for machine tool components during operation based on the actual operating life and the respective load profile. Therefore, a stochastic model based on the Weibull cumulative damage generalized log-linear model and the Monte Carlo simulation is used. Furthermore, the effect of the dynamic optimization...
A high and constant machine reliability in combination with low life cycle cost is the key challenge for today's production. Equipping highly integrated production facilities with robust components and monitoring functions combined with the applicable technical services contributes significantly to guaranteeing machine reliability. In this context, binding reliability predictions are demanded within...
The reliability of machine components depends on their operational conditions. In order to maximize this reliability, the preventive maintenance intervals and the provision of spare parts have to be adapted to the individual load collectives. Up to now, there has been for different machine components no comprehensive approach to quantify the effect of load collectives and to adapt the respective actions...
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