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Документ Simulation of effects of metal phase in a diamond grain and bonding type on temperature in diamond grinding(Springer-Verlag London, 2012) Mamalis, A. G.; Grabchenko, A. I.; Fedorovich, V. A.; Kundrak, J.Manufacturing diamond wheels on various bonds is a relatively high-cost process, requiring high labour and high consumption of expensive diamond grains but yielding relatively low productivity. With better knowledge of the various factors involved in the sintering process, the most efficient combinations can be found, leading to higher productivity. Currently, there are no scientifically based recommendations for the choice of the rational combinations of strength, brand of grain, graininess and concentration with the physical–mechanical properties of bonds. The aim of this research is the development of a technique for the theoretical definition of an optimal combination of strength properties of diamond grains and bond to provide maximum retention of diamond grain integrity during the process of diamond wheel manufacture. This is investigated using 3D simulations of the deflected mode of the sintering area of the wheel's diamond bearing layer.Документ Mathematical simulation of motion of working medium at finishing-grinding treatment in the oscillating reservoir(Springer-Verlag London, 2014) Mamalis, A. G.; Grabchenko, A. I.; Mitsyk, A. V.; Fedorovich, V. A.; Kundrak, J.The results of mathematical simulation have been carried out for the pattern of working medium motion providing the technological process of finishing–grinding treatment in an oscillating reservoir. With use of physics laws, it is ascertained and grounded that the flow of granules at the plane wall of reservoir is travelling oppositely to the source of vibrations, whereas the granules are drifting on the cycloid–trochoid trajectories from the wall of reservoir, where the looped displacement is maximal, to the center of reservoir in which the shift of granules is reduced to minimum because of damping and dissipation effect. The received theoretical regulations have a fundamental nature and can be used at the account of technological parameters of designed vibration machines.Документ Development of modular machine design and technologies of dynamic action for finishing-grinding treatment by an oscillating abrasive medium(Nova Science Publishers, Inc., 2015) Mamalis, A. G.; Kundrak, J.; Mitsyk, A. V.; Fedorovich, V. A.A complex approach is proposed to designing machines and technologies for finishinggrinding treatment of complex-shaped parts by an oscillating fine-dispersed abrasive medium. A designed element base has been developed for the design-technological synthesis of the autonomously controlled actuating mechanisms in the form of the device with the processed parts and the reservoir, combined into a single aggregate modular machine. The field of combining schemes of the power actions on an abrasive medium and processed parts has been considered.Документ 3D simulation of diamond grinding process by finite element method(НТУ "ХПИ", 2011) Mamalis, A. G.; Grabchenko, A. I.; Fedorovich, V. A.; Kundrak, J.; Babenko, A. E.Process of manufacture of diamond wheels on various bonds is characterized by high labour content and low productivity, high consumption of expensive diamond grains and, as consequence, the high cost price of a further operational process of diamond wheels. It is necessary to attain reliability and quality heightening at diamond-abrasive tool manufacture without which its effective application in production is impossible. Production of diamond - abrasive tool is founded on establishment of physical and technological regularities of sintering process of diamond-bearing layer. Now there are no scientifically based recommendations for choice of the rational combinations of strength, brand of grain, graininess, concentration with the physical-mechanical properties of bonds. The aim of given research is the development of the technique of the theoretical definition of an optimal combination of strength properties of diamond grains and bond at which ones retention of diamond grain integrity at the process of manufacture of diamond wheel is ensured by using 3D simulations of deflected mode of sintering area of its diamond-bearing layer.