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Документ Face milling with a round insert at various cutting speeds and feed rates(Національний технічний університет "Харківський політехнічний інститут", 2019) Makkai, Tamas; Kundrak, Janos; Karkalos, Nikolaos E.; Markopoulos, Angelos P.Face milling is frequently used for the rendering of flat surfaces with a high degree of precision. With this machining process, high material removal rate is possible to be attained but management of cutting forces values is also desirable, in order to avoid excessive power consumption, tool wear or vibrations. This can be achieved by selecting the process parameters within an appropriate range for each case. In the present study, an experimental investigation is conducted with a view to determine the effect of two important process parameters, namely cutting speed and feed on the cutting forces and the specific cutting forces during face milling, in cases where a round insert is used.Документ Comparative analysis of CBN cutting inserts with different edge geometries(Національний технічний університет "Харківський політехнічний інститут", 2019) Kundrak, Janos; Sztankovics, Istvan; Gevai, MartinaIn this paper the experimental results of newly developed cutting inserts with special geometry and position for machining of hardened surfaces are summarized. The design of the tool holder and cutting insert allows the increase of the applied feed values in hard turning. Experiments are carried out at increased feed in bore turning procedure and the results are compared with the nowadays used conventional turning technology.Документ Investigation of surface roughness characteristics of face milling(Національний технічний університет "Харківський політехнічний інститут", 2019) Nagy, Antal; Kundrak, JanosSurface quality and accuracy affect the integrity and lifetime of machine parts and the operational requirements of the structural (or assembly) units. These are the reasons that the expected surface roughness must be planned based on the operational requirements of the parts. The path of the tool edge, which is defined by the characteristics of the kinematics of face milling, makes the milled surface inhomogeneous, which means the roughness analysis in various directions gives different values. In this paper the effect of increasing the feed rate on surface roughness is investigated. This cutting data is chosen because increasing the feed rate is an effective way to increase productivity.