@article{MTMT:34863329, title = {Investigation of the transient change of the cutting force during the milling of C45 and X5CrNi18-10 steel taking into account the dynamics of the electro-mechanical measuring system}, url = {https://m2.mtmt.hu/api/publication/34863329}, author = {Pálmai, Zoltán and Kundrák, János and Felhő, Csaba and Makkai, Tamás}, doi = {10.1007/s00170-024-13640-6}, journal-iso = {INT J ADV MANUFACT TECHNOL}, journal = {INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY}, unique-id = {34863329}, issn = {0268-3768}, abstract = {The possible methods of determining the cutting force—due to the great practical importance of knowing the force—have long been and are still intensively studied areas of cutting theory. In milling, cutting is a series of successive short material removals. During force measurement in such cases, the transient process that can be detected at the beginning of the process can influence the nature of the entire cutting cycle. The present study reports on the research, the aim of which was to explore the dynamic process of cutting force measurement in intermittent cutting. The measurements were made during face milling of C-steel and highly alloyed steel (X5CrNi 18–10). The milling head contained a single insert, with which the disturbing interaction of the multiple cutting edges was eliminated. As a result of the work, a method suitable for examining the close relationship between the initial transient nature of the milling cycle and the decay, as well as a mathematical model for the decay process, was developed. The model was validated with cutting experiments and measurements. The achieved results can be used to better understand the process of chip removal and to determine the actual power requirements of milling works.}, year = {2024}, eissn = {1433-3015}, orcid-numbers = {Felhő, Csaba/0000-0003-0997-666X} } @article{MTMT:34755555, title = {Roughness of Face-Milled Surface Topography in Directions Relative to the Feed Movement}, url = {https://m2.mtmt.hu/api/publication/34755555}, author = {Nagy, Antal and Kundrák, János}, doi = {10.21062/mft.2024.024}, journal-iso = {MANUFAC TECHN}, journal = {MANUFACTURING TECHNOLOGY}, volume = {24}, unique-id = {34755555}, issn = {1213-2489}, year = {2024}, pages = {241-254}, orcid-numbers = {Nagy, Antal/0000-0001-6160-4973} } @article{MTMT:34398760, title = {Roughness investigation of single and double cutting marks on face milled surface}, url = {https://m2.mtmt.hu/api/publication/34398760}, author = {Nagy, Antal and Kundrák, János}, doi = {10.20998/2078-7405.2023.99.07}, journal-iso = {CUTTING TOOL TECHN SYST}, journal = {REZANIE I INSTRUMENT V TEHNOLOGICESKIKH SISTEMAKH / CUTTING AND TOOL IN TECHNOLOGICAL SYSTEMS}, volume = {99}, unique-id = {34398760}, issn = {2078-7405}, abstract = {In machining with defined cutting edge tools, in some rotational tool processes (e.g. face milling) the tool edge may scratch the surface of the workpiece one more time, depending on the cutting conditions, during one revolution of the tool. As a result, the topographies with single or double cutting marks will be different from each other. The deviation, depending on its size, can also affect the functional performance (e.g. friction conditions) of the operating surfaces. In this article, face-milled topographies created with a symmetrical setting and with single or double milling marks are compared according to the magnitude of the roughness and the degree and nature of the inhomogeneity.}, year = {2023}, pages = {58-70}, orcid-numbers = {Nagy, Antal/0000-0001-6160-4973} } @inbook{MTMT:34344244, title = {Investigation of change in roughness in parallel sections in a direction different from feed vector on a face milled surface}, url = {https://m2.mtmt.hu/api/publication/34344244}, author = {Nagy, Antal and Kundrák, János}, booktitle = {Development in Machining Technology: Scientific – Research Reports Vol. 11}, unique-id = {34344244}, year = {2023}, pages = {67-79}, orcid-numbers = {Nagy, Antal/0000-0001-6160-4973} } @article{MTMT:33880460, title = {Investigation of face milled surface topography on C45 workpiece assuming movement at 30° and 60° to feed direction}, url = {https://m2.mtmt.hu/api/publication/33880460}, author = {Nagy, Antal and Kundrák, János}, doi = {10.20998/2078-7405.2023.98.12}, journal-iso = {CUTTING TOOL TECHN SYST}, journal = {REZANIE I INSTRUMENT V TEHNOLOGICESKIKH SISTEMAKH / CUTTING AND TOOL IN TECHNOLOGICAL SYSTEMS}, volume = {98}, unique-id = {33880460}, issn = {2078-7405}, year = {2023}, pages = {116-127}, orcid-numbers = {Nagy, Antal/0000-0001-6160-4973} } @article{MTMT:33267620, title = {Increasing the reliability of a bladed tool made from synthetic polycrystalline diamonds}, url = {https://m2.mtmt.hu/api/publication/33267620}, author = {Kundrák, János and Fedorovich, Vladimir and Markopoulos, Angelos P. and Pyzhov, Ivan and Ostroverkh, Yevgeniy}, doi = {10.1016/j.ijrmhm.2022.106045}, journal-iso = {INT J OF REFRACT MET AND HARD MATERIALS}, journal = {INTERNATIONAL JOURNAL OF REFRACTORY METALS AND HARD MATERIALS}, volume = {110}, unique-id = {33267620}, issn = {0958-0611}, year = {2023}, eissn = {0263-4368} } @article{MTMT:33111109, title = {Analysis of the general tool life function of cutting tools by application of the catastrophe theory}, url = {https://m2.mtmt.hu/api/publication/33111109}, author = {Pálmay, Zoltán and Kundrák, János and Felhő, Csaba}, doi = {10.1177/09544054221123480}, journal-iso = {P I MECH ENG B-J ENG}, journal = {PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE}, volume = {237}, unique-id = {33111109}, issn = {0954-4054}, abstract = {Production technology planning requires information on tool life T and its relation to cutting speed v. These technological parameters fundamentally affect the economics of the operation of the entire production system. The aim of the present study is to investigate the v-T relationship under technological conditions where this relationship cannot be described by the methods used so far ? typically the Taylor formula. As the Taylor formula often cannot be linearized on an log-log scale, a general tool life function has been developed for describing a v-T function with a convex-concave part. The function was validated by the boring of hardened ball bearing rings with the technological data D?=?45, 75 and 100 mm, ap?=?0.14?mm, fz?=?0.005?mm/rev. The general v-T tool life function has been transformed into a quadratic polynomial known in catastrophe theory as cusp catastrophe and allows the description of abrupt changes in the system under study. Using catastrophe theory, an analogy is established between the general tool life function and the cusp catastrophe, allowing topological mapping of the general v-T function. Results were verified by machinability tests in the turning of C35 and C60 conventional and specially deoxidized C-steels during steelmaking. Cutting tests were performed on specimens with a diameter of Dexp?=?76?mm and a length of L?=?700?mm at a speed of v?=?100, 150, 200?m/min and a carbide tool of category P20. It was found that in the convex-concave section of this function, 2?3 cutting speeds can be selected for a given tool life, which is advantageous for harmonizing tool changes in multi-operation technology.}, year = {2023}, eissn = {2041-1975}, pages = {873-884}, orcid-numbers = {Felhő, Csaba/0000-0003-0997-666X} } @article{MTMT:33576765, title = {Mérési beállítások hatása a topográfia mért értékeire homlokmart felületen}, url = {https://m2.mtmt.hu/api/publication/33576765}, author = {Nagy, Antal and Kundrák, János}, doi = {10.35925/j.multi.2022.5.6}, journal-iso = {MULTIDISZCIPLINÁRIS TUDOMÁNYOK}, journal = {MULTIDISZCIPLINÁRIS TUDOMÁNYOK: A MISKOLCI EGYETEM KÖZLEMÉNYE}, volume = {12}, unique-id = {33576765}, issn = {2062-9737}, year = {2022}, eissn = {2786-1465}, pages = {54-65}, orcid-numbers = {Nagy, Antal/0000-0001-6160-4973} } @article{MTMT:33296653, title = {Analysis and Prediction of Roughness of Face Milled Surfaces using CAD Model}, url = {https://m2.mtmt.hu/api/publication/33296653}, author = {Kundrák, János and Felhő, Csaba and Nagy, Antal}, doi = {10.21062/mft.2022.061}, journal-iso = {MANUFAC TECHN}, journal = {MANUFACTURING TECHNOLOGY}, volume = {22}, unique-id = {33296653}, issn = {1213-2489}, year = {2022}, pages = {558-572}, orcid-numbers = {Felhő, Csaba/0000-0003-0997-666X; Nagy, Antal/0000-0001-6160-4973} } @inproceedings{MTMT:33214328, title = {Analysis of inhomogeneity of surfaces milled with symmetrical, down-milling, and up-milling settings}, url = {https://m2.mtmt.hu/api/publication/33214328}, author = {Nagy, Antal and Kundrák, János}, booktitle = {Development in Machining Technology: Scientific – Research Reports vol.10}, unique-id = {33214328}, year = {2022}, pages = {51-62}, orcid-numbers = {Nagy, Antal/0000-0001-6160-4973} }