Study and the implementation of the new technology of piston rings production

摘要

Purpose - Ferric and ferrous oxides are used for coating of piston rings in order to obtain the layer, facilitating their wearing-in at the beginning of work. This paper aims to present study and the implementation of the anti-wear technology of piston rings production with the application of ferrous oxides. Those rings are intended for two-stroke self-ignited diesel engines used for driving the diesel locomotives. Design/methodology/approach - It was decided to use magnetite, Fe{sub}3O{sub}4, together with a binding agent, sodium metasilicate. Working out the adequate technology of filling the grooves of piston rings required performing a broad research range. It is possible to apply three different technologies. In order to find out which of the three methods of filling grooves gives the best results, the series of experiments were planned. Findings - Experimental results cover the variability intervals of input factors enabling the selection of their best combination by the analysis of the regression function. The paper describes the experimental plan for the wet technology with water-glass, since it occurred to be the best considering the equipment of the factory in which it was implemented. In order to cover the variability field of input factors, the multifactor Hartley's plan was applied. On the basis of the performed investigations, it was found that all input factors are significantly influencing the filling quality of ring grooves on piston rings. Practical implications - This technology in one of the Polish factories in piston rings production was implemented. The implemented technology allows the production of approximately 500,000 rings annually. Originality/value - The paper presented a new anti-wear technology of the sealing piston rings for diesel.