Різання та інструменти в технологічних системах

Постійне посилання на розділhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/62923

Офіційний сайт http://rits.khpi.edu.ua/

У збірнику публікуються наукові статті, у яких висвітлюються актуальні питання в області механічної обробки сучасних матеріалів із застосуванням високопродуктивних технологій, нових методів та вимірювальних приладів для контролю якості оброблених поверхонь і високоефективних різальних інструментів. Висвітлюються аспекти оптимізації й математичного моделювання на різних етапах технологічного процесу.

Рік заснування: 1966. Періодичність: 2 рази на рік. ISSN 2078-7405 (Print)

Новини

Збірник «Різання та інструменти в технологічних системах» включено до Переліку наукових фахових видань України з технічних наук до категорії «Б» згідно Наказу МОН України №409 від 17.03.2020 р.

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20232

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ORCID: search.filters.orcid.http://orcid.org/0000-0002-8926-1324

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  • Ескіз
    Документ
    Purpose and technological properties of granular media for vibration finishing and grinding processing
    (Національний технічний університет "Харківський політехнічний інститут", 2023) Mitsyk, Аndrii ; Fedorovich, Vladimir; Ostroverkh, Yevgeniy
    The purpose and characteristics of granular working media used in vibration processing operations are given. It is indicated that the purpose of granular media is their contact interaction with the processed part surface under conditions of various energy parameters. This interaction is accompanied by elastic-plastic deformation, micro-cutting, adhesion and mechanic-chemical processes. Indicators of technological and operational properties for various types of granular media are given, including the intensity of material removal from the processed surface, cutting ability, wear resistance and achieved surface roughness. The physical and technological parameters of granular media have been established, including deformability, hardness during finishing and hardening operations and surface roughness of the media granules. The influence of the parameters of processing media granules on the productivity of vibration treatment has been determined. It is shown that such parameters are the binding of the granules material, its wear resistance, grain material, granulation and the shape of individual granules. It is noted that the choice of granule sizes depends on two main factors such as: the necessity to obtain a given roughness and high productivity of vibration operations. It was revealed that to ensure high surface cleanliness, the use of small granules of the medium is required, but to obtain high productivity, the use of large granules is required. Approximate dependencies have been determined that relate the size and weight of granules of the processing medium and the processed parts. It is indicated that the best results in achieving high quality of the processed surface and sufficient productivity are provided by granular media with a shape close to a sphere. It is noted that granules in the form of cones, pyramids, prisms and other forms are used for the successful processing of hard-to-reach places in the form of small holes, straight and sharp angles in the interface of the surface of parts, niches or pockets. Such granules are specially manufactured from a mixture of grinding powders of various grain sizes and an inorganic binder based on clays. The features of the physical and technological parameters of processing media are given.
  • Ескіз
    Документ
    Topographic adaptability in the diamond grinding zone of superhard materials
    (Національний технічний університет "Харківський політехнічний інститут", 2023) Fedorovich, Vladimir; Ostroverkh, Yevgeniy; Romashov, Dmitry
    A comprehensive theoretical and experimental analysis of technological topographic adaptability is carried out, based on an idealized description of the topographic parameters of the working surface of the grinding wheel, their changes during its wear and experimental laser scanning of the working surface of the grinding wheel and the processed superhard material (SHM). It has been established that the protrusion height of diamond grains affects the intensity of destruction (removal) of stock through a change in the number of working grains and the actual contact area of the SHM with the working part of the grinding wheel surface. In a controlled grinding process, it is possible to stabilize the working height of the grains in any of the 3 stages of their wear intensity, equating this intensity with the intensity of removal of the intergranular bond. A method has been developed for determining the actual contact area of the working surface of the grinding wheel and changing its technological adaptability. It has been established that in the process of topographic adaptability, the actual contact area can change by several orders of magnitude, respectively, the specific pressure at the contact of diamond grains with the SHM will change, and, consequently, the nature and intensity of their mutual destruction.