Lavrinenkov A. Intensification of burnishing processes of titanium alloys for enhancement of resource of details

The actual scientific and technical problem of an intensification of burnishing processes of titanium alloys has been solved for enhancement of resource of details. The model of contact interaction between a tool and detail's surface with use of metal-containing lubricant has been proposed for theoretical analysis of surface plastic deformation by burnishing. As a result of the theoretical analysis a generalized model of burnishing process of details with the presence of an intermediate plastic layer between the surface of detail and the tool has been developed. A simulation of burnishing with additional ultrasound (US) loading at the tool and without US loading, and also a simulation of burnishing with intermediate plastic layer has been carried out by the finite element method (FEM). On the basis of FE simulation a construction of ultrasonic concentrator of longitudinal-torsional oscillations has been developed for experimental study. The experimental study of influence of process parameters of US burnishing on quality parameters of surface layer has been carried out. It was established that calculation error does not exceed 12-18%. It was shown that application of metal-containing lubricant and longitudinal-torsional US oscillations is effective at the speed when intensification of mechanism of adhesion wear of friction pair occurs. New technological solutions which secure the effectiveness of burnishing process and which protected by 3 Ukrainian patents have been proposed on the basis of generalized theoretical and experimental results. Results of dissertation have been implemented at industrial enterprises.