RELIABILITY ANALYSIS OF THE MACHINE SYSTEM AT SMALL-SIZE THREADING IN DEEP HOLES

The reliability of the machine system is analyzed for small-size threading in blind deep holes. It is based on the design, kinematics and operating principle of MAXXmill 630 multi-operation center. Markov system for assessing the reliability of a machine is described, which gives basis for finding nodes that have a great influence on its reliability. An analytical Markov model is developed, where, based on the analysis of the state graph, the most vulnerable nodes of a multioperative machining center are identified. Analytical Markov, semi-Markov and simulation mathematical models are developed to analyze the reliability of the fixture system. The comparative analysis of Markov and semi-Markov systems depends on the system downtime ratios obtained. The results of the analytical semi-Markov and simulation models are verified, which confirm the reliability of the analytical semi-Markov model.