Кафедра агроінженерії та автомобільного транспорту

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https://dspace.pdau.edu.ua/handle/123456789/13829

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Перегляд Кафедра агроінженерії та автомобільного транспорту за Автор "Ivankova, O. V."

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  • Ескіз
    Документ
    Effect of vibration treatment on increasing the durability of tillage equipment working bodies
    (Eastern-European Journal of Enterprise Technologies, 2021-04-20) Dudnikov, A. A.; Ivankova, O. V. ; Gorbenko, O. V. ; Kelemesh, A. O. ; Дудніков, Анатолій Андрійович; Горбенко, Олександр Вікторович; Келемеш, Антон Олександрович; Іванкова, Олена Володимирівна
    This paper reports a study into the durability of tillage equipment working bodies. It has been established that the quality of surface layers during plastic deformation depends on a series of factors. These factors include the degree of hardening, the thickness of the hardened layer, the size and nature of the distribution of residual stresses. The study has shown that the technology to restore working bodies that involves vibration oscillations provides for higher durability. Investigation of deformed samples demonstrates that when exposed to vibration treatment, the microstructure is more fine-grained and even; the hardness of the treated surface of a ploughshare blade increases by 22‒35 %. This contributes to hardening the machined surface. It has been established that the tillage equipment working body wear is a random process, which is predetermined by changes in the structural dimensions and shape of cutting elements. An analysis of the wear distribution density of cutting elements has revealed its compliance with the law of normal distribution. It should be noted that the most influential geometric parameter of a working body affecting the part’s resource is the wear depth. This parameter determines the residual thickness of the ploughshare wall. Data from surface-layer studies at hardening make it possible to note a decrease in the limiting state of the examined parameters. In particular, the wear of a ploughshare tip was 17 % less than the limiting state. The study of durability has shown that the amount of tillage equipment working body wear is 1.28 times less when using vibrational plastic deformation. Accordingly, when restoring ploughshares, in order to increase the working bodies’ resource, it is more expedient to use a method that implies the welding of tires made from steel 45 involving sormite surfacing and vibration treatment.
  • Ескіз недоступний
    Публікація
    Research into the restoration of parts by plastic deformation
    (2025) Іванкова, Олена Володимирівна; Ivankova, O. V.; Fedin, V.
    Increasing the durability of machines is a priority task of the technical maintenance and repair industry. In modern conditions, the development and implementation of progressive technologies for the restoration of worn machine parts is of particular relevance, which is one of the priority tasks for our country. At the same time, the processes of plastic deformation in the repair of parts currently have limited application, despite their significant potential. This necessitates the need for targeted research into the use of plastic deformation for the restoration of specific machine parts. Hydraulic systems are important components of most machines and mechanisms, and their reliability largely determines the performance of the equipment as a whole. Gear pumps, as key elements of hydraulic systems, operate under conditions of increased loads and intense friction. The main causes of their failures are violations of the adjustment gaps in the mating parts, which arise as a result of reaching the limit of wear, in particular bushings. The article provides an analysis of the operating conditions of gear pumps, as well as characteristic defects and types of wear of their parts. The results of the analysis showed the possibility of restoring worn bushings using plastic deformation methods. The restoration method, the choice of equipment, tools and technological process modes are substantiated, and a rational heat treatment mode is proposed. The conclusion is made about the feasibility and possibility of using plastic deformation to restore gear pump bushings in order to increase their durability. The use of plastic deformation in the restoration of bushings allows you to compensate for the worn layer of material due to a controlled change in the geometric parameters of the part and the formation of a wear-resistant material structure without the formation of a heat-affected zone. The deposition and distribution processes provide an increase in the physical and mechanical properties and dimensional stability of the restored parts, which contributes to the increase in their operational reliability.
  • Ескіз
    Документ
    STUDY OF THE INFLUENCE OF ELECTRODE MATERIALS ON THE PROPERTIES SURFACE OF PARTS DURING RECOVERY BY THE METHOD OF ELECTRO SPARK TREATMENT
    (2020-10) Ivankova, O. V.; Velit, I. A.; Bartosh, V. Yu.; Yakimenko, D. I.; Іванкова, Олена Володимирівна; Веліт, Ірина Анатоліївна; Бартош, В. Ю.; Якименко, Дмитро Ігорович