Browsing by Author "Semichev, Andrii V."

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    Calculation and Analytical Method for Determining the Force Parameters of a Crank-Slider Mechanism (Message 2. Kinetostatics)
    (National Metallurgical Academy of Ukraine, Dnipro, 2023) Dobrov, Ihor V.; Semichev, Andrii V.; Pavlenko, O. M.
    ENG: The purpose of the work is to develop an algorithm and a program for calculating the power parameters of the crank-slider mechanism, taking into account the proven in practice and well -recommended: analytical method of calculating the kinematics of the slider and the graph-analytical method of calculating the power parameters of the crank-slider mechanism. Research results. The new calculation method and an algorithm for determining the force parameters of the crank-slider mechanism. Scientific novelty. The new method for the analysis of force parameters of a crank –slider mechanism, which differs from the existing methods of graph-analytical and analytical methods by the use of a new calculation-analytical method of determining the linear and angular accelerations of each link of the mechanism for solving the kinetostatic equations of the mechanism as a whole. Practical value. The created algorithm makes it possible to perform a preliminary assessment of the force parameters of mechanisms and aggregates using crank-slider mechanisms at the stage of technological design, technical and economic calculation of new aggregates or modernization of existing equipment when changing technological regimes related with the production of modern competitive products, in particular, for the production of seamless pipes on mills with rollers for cold rolling of pipes.
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    Roll Drive Mechanism with Planetary Gearbox for Cold Pilger Pipe Rolling Mills
    (Ukrainian State University of Science and Technologies, Dnipro, 2025) Danchenko, V. M.; Dobrov, Ihor V.; Semichev, Andrii V.
    ENG: Purpose. Creation and study of a roll drive mechanism with a planetary gearbox, which will ensure a reduction in axial forces in the production of thin-walled pipes and it will expand the range of pipes obtained on cold pilger rolling mills. Methodology. The work includes research on determining the parameters of the roll drive of cold pilger rolling mills using the graph-analytical method of studying the kinematics of mechanisms. Results. The roll drive mechanism with a planetary gearbox will ensure regulation of the angular speed of rotation of the rolls and a reduction in axial forces. Scientific novelty. The influence of the geometric parameters of the roll drive on the value of the angular speed of the rolls, which ensure a reduction in axial forces, has been determined. Practical significance. The roll drive mechanism with a planetary gearbox allows obtaining high-quality thin-walled pipes with the possibility of expanding the range.