The possibilities of the use of power-saving processes of cyaniding and boronizing instead of the traditional gas nitriding without deterioration of the service stability of the tools are described. The nitriding process is shown to be intensified by treatment in a vibrofluidized bed.

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The concept ‘model’ in mechanical engineering is analyzed. Some problems of model usage at the industrial enterprise are named: ontology of elements of difficult model system; difference between the description of the model in natural language and mathematical language; the problem of fitting objects. Design of new way of feedback between a paint robot and its operator based on the use of not only virtual, but also augmented reality, requires an appeal to the ontology of models or to philosophical discourse. The difference between model description in natural and artificial languages implies the application of a semantic approach. The problem of fitting objects during the model testing in mechanical engineering can be solved during testing. The authors argue that the use of an interdisciplinary approach in comprehending complex model systems, taking into account virtual and augmented realities, allows us to clarify the conditions for using virtual 3D models in mechanical engineering.

In this study, the effect of thermal oxidation on the properties of the surface of titanium alloys was examined. Thermal oxidation was carried out at 750 °C within 6 hours, 800 °C within 5 hours, and 850 °C within 4 hours. Electrical resistance of the surface after thermal oxidation was measured. Metallographic analysis, microprobe analysis and X-ray phase analysis were carried out to determine the structure, chemical and phase compound of the oxide layer on the surface of titanium alloys after thermal oxidation. The results indicate that thermal oxidation leads to increase of electrical resistance of the surface of titanium alloys. Microstructural analysis showed that thickness of the oxide layer after thermal oxidation is in the range of 25 to 100 μm. Microprobe and X-ray phase analysis showed that TiO2 and Al2O3 oxides have the best impact on electrical resistance. Two variants of possible application of the results have been presented.

Повышение точности обработки нежестких деталей в центрах на станках с числовым программным управлением