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Paweł Lisiak, Izabela Rojek and Paweł Twardowski


The article describes a method of evaluating the reliability of groove turning for piston rings in combustion engines. Parameters representing the roughness of a machined surface, Ra and Rz, were selected for use in evaluation. At present, evaluation of surface roughness is performed manually by operators and recorded on measurement sheets. The authors studied a method for evaluation of the surface roughness parameters Ra and Rz using multi-layered perceptron with error back-propagation (MLP) and Kohonen neural networks. Many neural network models were developed, and the best of them were chosen on the basis of the effectiveness of measurement evaluation. Experiments were carried out on real data from a production company, obtained from several machine tools. In this way it becomes possible to assess machines in terms of the reliability evaluation of turning.

Open access

László Beda and Attila Szabó

References [1] ANCA-COUCE A. ET AL: Smouldering of pine wood: Kinetics and reaction heat, Combustion and Flame 159 (2012) pp.1708-1719 [2] ED. KEVIN GRATTAN: Fire Dynamics Simulator (V.4) Technical Reference Guide (2006), p. 30 [3] PAULIK F., PAULIK J., ERDEY L., Z. Anal. Chem., 160 (1958) 241 [4] WHITE R. H. AND DIETENBERGER M. A.: Encyclopedia of Materials: Science and Technology, Elsevier Science Ltd. (2001)p p. 9712-9716 [5] POKOL GY., VÁRHEGYI G.: Kinetic aspects of

Open access

László Beda and Csaba Szikra

flows, Progress in Energy and Combustion Science 39 (2013) pp. 215-245) [12] CHIU,H.H AND SU S.P: Theory of droplets (II): states, structures, and laws of interacting droplets, Atom. Sprays 7 (1) (1997) pp.1-32. [13] HIETANIEMI, J. AND MIKKOLA E.: Design, Fires for Fire Safety Engineering, VTT Technical Research Centre of Finland,, ISBN 978-951-38-7479-7 (URL: [14] MCGRATTAN, K. AND HOSTIKKA, S. AND FLOYD, J. AND BAUM, H. AND REHM, R.: Fire Dynamics Simulator (Version 5