Перегляд за Автор "Markov, O. E."

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Development and research of the stamp for cutting of a rolled stock with a differentiated clamp
(2022) Karnaukh, S. G.; Markov, O. E.; Shapoval, A. A.; Zubenko, K. V.; Зубенко, K. В.
The work aims to develop and research a stamp with a differentiated clamp of a rolled stock for cutting by shear. A new stamp design with a differentiated clamp of the rolled stock has been developed. In terms of their technical and economic indicators, these stamps meet or exceed the modern samples of similar punch tools. At the same time, in the process of vertical cutting, a constant position of the rolled stock axis is ensured. The transmission of force to the clamp through the rolled stock is excluded. The stamp design ensures its sufficiently high rigidity and relatively small overall dimensions. Based on the analysis of the mathematical model of a stamp with a differentiated clamp, the effective angles of force transmission to the clamp and the cutting of the rolled stock between the stamp parts have been established. The resulting model was used to optimize the angles of force transfer to the clamp, and the cutting rolled stock, respecting the force from the side of a buffer and the minimum required press force. At the same time, the vertical stroke of the moving parts is reduced, the overall dimensions of the stamp are decreased, and the buffer also has a minimum size. To reduce the required force of the press, it is necessary to reduce the value of a frictional slipping coefficient by using antifriction materials on contact surfaces and ensuring good lubrication conditions. The results of the conducted experiments confirm the adequacy of the mathematical model. The value of the required force on the press slide available from experiments is slightly higher than the values obtained by the developed analytical model. The results of the stamp implementation show that: the stamps are efficient and reliable in exploitation; the quality of the cutoff workpieces corresponds to the quality indicators of the workpieces cut on similar modern equipment.
Progressive technologies of forging large parts with responsible destination
(Baltija Publishing, 2022) Kalchenko, P. P.; Markov, O. E.; Aliiev, I. S.; Hrudkina, N. S.; Грудкіна, Н. С.
The technological features of forging the main types of forged pieces in the monograph, which are often manufactured on hydraulic presses with a shorter length of waste for plates were considered; the production of crankshafts with reversal of crank in the process of forging; the principal issues of developing technology for forging hollow spherical forged pieces were stated; many other technical processes of forging large forged pieces were described, taking into account the latest advances in inventions and new technological solutions. The technological processes, which were developed by technologists of the Bureau of Large Forged pieces, which were applied to the production conditions of the machine-building plant for the needs of heavy engineering in this monograph were used. The monograph can be used as a textbook for undergraduates and bachelors in relevant specialities.