Факультет технічних систем і енергоефективних технологій (ТеСЕТ)
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Item Mathematical estimation of roughness Rz of threaded surface obtained by machining method(MM Publishing, 2022) Некрасов, Сергій Сергійович; Некрасов, Сергей Сергеевич; Nekrasov, Serhii Serhiiovych; Peterka, J.; Жигилій, Дмитро Олексійович; Жигилий, Дмитрий Алексеевич; Zhyhylii, Dmytro Oleksiiovych; Довгополов, Андрій Юрійович; Довгополов, Андрей Юрьевич; Dovhopolov, Andrii Yuriiovych; Колесник, Віталій Олександрович; Колесник, Виталий Александрович; Kolesnyk, Vitalii OleksandrovychThe paper presents a mathematical model of the helical surface roughness Rz, obtained by the form-generating method with a to-size tool with a standard profile of cutting tool inserts. This machining method has maximum productivity with large pitches of the helix. The surface roughness of the auger flight is an important parameter since it works in a friction pair with an elastic element. The resulting dependence makes it possible to predict surface roughness in any of its sections, considering the helix curvature, depending on the feed and the cutting tool tip radius. The obtained dependence allows comparing the numerical solution with the linearized one obtained by finding the minimum distance from the intersection points of the tool edge circles at helical surface adjacent cutting points to the straight line connecting these adjacent points.Item Modeling of a Stress-Strain State of Detachable Connection in Details of Reinforced Composite Materials with Cea Method(Sciendo, 2020) Довгополов, Андрій Юрійович; Довгополов, Андрей Юрьевич; Dovhopolov, Andrii Yuriiovych; Некрасов, Сергій Сергійович; Некрасов, Сергей Сергеевич; Nekrasov, Serhii Serhiiovych; Жигилій, Дмитро Олексійович; Жигилий, Дмитрий Алексеевич; Zhyhylii, Dmytro Oleksiiovych; Савченко, Євген Миколайович; Савченко, Евгений Николаевич; Savchenko, Yevhen Mykolaiovych; Ступін, Борис Анатолійович; Ступин, Борис Анатольевич; Stupin, Borys AnatoliiovychIn order to study the strength of the proposed rope threaded joint for machine parts made of reinforced composite materials, a modeling of a stress-strain state was conducted using the software of finite-element analysis LS-DYNA. Stress-strain state modeling was conducted for a rope threaded joint, affecting on the main performance parameters considered to be p – thread pitch (p = 4 mm), and t – thread depth (t = 1 mm). The main thread parameters taken for the model were up to the metric thread М6 (ISO 724:1993) parameters.