@article{MTMT:34792165, title = {Egy egyszerűsített fékmodell termikus elemzése}, url = {https://m2.mtmt.hu/api/publication/34792165}, author = {Bolló, Betti and Sarka, Ferenc and Voith, Katalin}, journal-iso = {GÉP}, journal = {GÉP}, volume = {75}, unique-id = {34792165}, issn = {0016-8572}, year = {2024}, pages = {19-22}, orcid-numbers = {Bolló, Betti/0000-0001-8342-827X; Sarka, Ferenc/0000-0003-3136-4248} } @article{MTMT:34430738, title = {CAD Modelling of a Milling Insert}, url = {https://m2.mtmt.hu/api/publication/34430738}, author = {Makkai, Tamás and Sarka, Ferenc}, doi = {10.32972/dms.2023.019}, journal-iso = {DESIGN MACHINES STRUCTURES}, journal = {DESIGN OF MACHINES AND STRUCTURES}, volume = {13}, unique-id = {34430738}, issn = {1785-6892}, abstract = {There is often a problem when using FEM software where the tool geometry needs to be specified for the cutting simulation, one or more dimensions are not known. In the article, we present how and with what methods we determined these unknown dimensions, how we created the three-dimensional CAD model of the cutting insert as input data for the FEM software. We report our experience gained during the measurement and model creation process.}, year = {2023}, eissn = {2064-7522}, pages = {81-92}, orcid-numbers = {Makkai, Tamás/0000-0002-7840-9856; Sarka, Ferenc/0000-0003-3136-4248} } @article{MTMT:34430468, title = {Improving Chatter Performance of a Lathe Spindle through Grapho-Optimization}, url = {https://m2.mtmt.hu/api/publication/34430468}, author = {Alzghoul, Mohammad and Sarka, Ferenc and Szabó, Ferenc János}, doi = {10.32972/dms.2023.012}, journal-iso = {DESIGN MACHINES STRUCTURES}, journal = {DESIGN OF MACHINES AND STRUCTURES}, volume = {13}, unique-id = {34430468}, issn = {1785-6892}, abstract = {Structural modifications to spindle systems have been demonstrated in previous studies to improve their dynamical performance. The aim of this study is to improve the performance of a lathe spindle system in terms of chatter occurrence, while maintaining the same overall mass of the system. The design of the spindle system is optimized using the grapho-optimization method, employing the Kuhn-Tucker optimality criterion to evaluate the design parameters. Specifically, the thickness of the spindle shaft and the diameter of the shaft next to the chuck are varied. The optimized spindle system shows a significant improvement in the first natural frequency value compared to the original design; the first natural frequency is increased by 59.7 %.}, year = {2023}, eissn = {2064-7522}, pages = {5-12}, orcid-numbers = {Sarka, Ferenc/0000-0003-3136-4248; Szabó, Ferenc János/0000-0002-6694-8959} } @article{MTMT:34032515, title = {Modelling possibilities of bolt connections with finite element method}, url = {https://m2.mtmt.hu/api/publication/34032515}, author = {Sarka, Ferenc}, doi = {10.32972/dms.2023.009}, journal-iso = {DESIGN MACHINES STRUCTURES}, journal = {DESIGN OF MACHINES AND STRUCTURES}, volume = {13}, unique-id = {34032515}, issn = {1785-6892}, abstract = {In the article, the possibilities of simulating bolted joints in the Ansys finite element program are presented. The purpose of the publication is to draw attention to the various simulating options. In the article, different simulation options are used for the same model. The versions to be used are 1) bolt connection without preload 2) bolt-tool, 3) beam-tool, 4) real screw thread modelling. In the article, I rely on previous publications, so some stages are presented in less detail than others. During the simulations, I compare the number of elements used, number of nodes, running time, stress and deformation results. The model used is a closed space loaded with internal pressure, which is divided into two halves. A gasket is installed between the two halves, the two halves are fastened to each other by a row of screws. In order to manage the running times, I only examine the part of the entire model corresponding to one screw. The screw joint is loaded with pretension, and the connecting elements with a constant pressure. Where possible in the software, the tightening torque is also taken into account. The results are presented in tabular form for easier comparison.}, year = {2023}, eissn = {2064-7522}, pages = {112-123}, orcid-numbers = {Sarka, Ferenc/0000-0003-3136-4248} } @article{MTMT:34032505, title = {Investigation of the involute spur gears with different pressure angles}, url = {https://m2.mtmt.hu/api/publication/34032505}, author = {Pintér, Ádám Sándor and Sarka, Ferenc}, doi = {10.32972/dms.2023.008}, journal-iso = {DESIGN MACHINES STRUCTURES}, journal = {DESIGN OF MACHINES AND STRUCTURES}, volume = {13}, unique-id = {34032505}, issn = {1785-6892}, abstract = {This article deals with an investigation of the choice of the profile shift coefficient for gears when the standard pressure angles of the gears are different. The basic idea for the study arose from a real-life problem where a gear in a piece of equipment needed to be replaced. In this article, a method is presented to determine, by approximation, the value of the profile shift coefficient that we have to use on a gear having 20° pressure angle to get similar tooth profile of a gear without profile shift and 21°of pressure angle. In addition, theoretical investigations are also carried out on the topic of gear meshing, using the profile shift coefficient.}, year = {2023}, eissn = {2064-7522}, pages = {103-111}, orcid-numbers = {Sarka, Ferenc/0000-0003-3136-4248} } @article{MTMT:33706581, title = {Fogaskerék profilpontok létrehozása profileltolás tényező alkalmazása során}, url = {https://m2.mtmt.hu/api/publication/33706581}, author = {Pintér, Ádám Sándor and Sarka, Ferenc}, doi = {10.35925/j.multi.2023.1.2}, journal-iso = {MULTIDISZCIPLINÁRIS TUDOMÁNYOK}, journal = {MULTIDISZCIPLINÁRIS TUDOMÁNYOK: A MISKOLCI EGYETEM KÖZLEMÉNYE}, volume = {13}, unique-id = {33706581}, issn = {2062-9737}, year = {2023}, eissn = {2786-1465}, pages = {12-20}, orcid-numbers = {Sarka, Ferenc/0000-0003-3136-4248} } @article{MTMT:33250226, title = {Analytical and Experimental Techniques for Chatter Prediction, Suppression and Avoidance in Turning: Literature Survey}, url = {https://m2.mtmt.hu/api/publication/33250226}, author = {Alzghoul, Mohammad and Sarka, Ferenc and Szabó, Ferenc János}, doi = {10.32972/dms.2022.011}, journal-iso = {DESIGN MACHINES STRUCTURES}, journal = {DESIGN OF MACHINES AND STRUCTURES}, volume = {12}, unique-id = {33250226}, issn = {1785-6892}, abstract = {Chatter is a self-excited vibration that takes place during turning operations. It is either to be avoided or reduced for its negative impact on the machine-tool, the workpiece surface finish, and the cutting tool life. A lot of research has been carried out in this domain to understand this phenomenon, which leads to finding ways to detect, identify, avoid, reduce, and control chatter in turning processes. In this paper, chatter research related to turning processes is reviewed and summarized. The main goal of this review paper is to compare different chatter prediction, suppression, and avoidance techniques to find out the most effective technique, so a scope of a work related to turning processes chatter is defined.}, year = {2022}, eissn = {2064-7522}, pages = {33-43}, orcid-numbers = {Alzghoul, Mohammad/0000-0002-4673-3328; Sarka, Ferenc/0000-0003-3136-4248; Szabó, Ferenc János/0000-0002-6694-8959} } @article{MTMT:33250206, title = {A Spindle System Analysis Using Systems Receptance Coupling Approach}, url = {https://m2.mtmt.hu/api/publication/33250206}, author = {Alzghoul, Mohammad and Sarka, Ferenc and Szabó, Ferenc János}, doi = {10.32972/dms.2022.010}, journal-iso = {DESIGN MACHINES STRUCTURES}, journal = {DESIGN OF MACHINES AND STRUCTURES}, volume = {12}, unique-id = {33250206}, issn = {1785-6892}, abstract = {The goal of this study is to dynamically simulate a turning-centre main spindle system utilizing the systems receptance coupling technique to determine the spindle system's first three resonant frequencies in the event of transverse vibrations. The findings are then confirmed using the finite element technique using ANSYS software. The significance of analysing the spindle system described in this study is that it can be utilized to optimize the spindle system in terms of resonance frequencies for improved performance in terms of spindle vibration while the turning centre is in operation.}, year = {2022}, eissn = {2064-7522}, pages = {25-32}, orcid-numbers = {Alzghoul, Mohammad/0000-0002-4673-3328; Sarka, Ferenc/0000-0003-3136-4248; Szabó, Ferenc János/0000-0002-6694-8959} } @article{MTMT:33168906, title = {Csavarkötés modellezési lehetőségei végeselemes módszerrel}, url = {https://m2.mtmt.hu/api/publication/33168906}, author = {Sarka, Ferenc}, doi = {10.35925/j.multi.2022.2.5}, journal-iso = {MULTIDISZCIPLINÁRIS TUDOMÁNYOK}, journal = {MULTIDISZCIPLINÁRIS TUDOMÁNYOK: A MISKOLCI EGYETEM KÖZLEMÉNYE}, volume = {12}, unique-id = {33168906}, issn = {2062-9737}, year = {2022}, eissn = {2786-1465}, pages = {60-70}, orcid-numbers = {Sarka, Ferenc/0000-0003-3136-4248} } @article{MTMT:33089329, title = {Examination of Bolt Connection with Finite Element Method}, url = {https://m2.mtmt.hu/api/publication/33089329}, author = {Sarka, Ferenc}, doi = {10.1007/978-3-031-15211-5_19}, journal-iso = {LECT NOTES MECHAN ENG}, journal = {LECTURE NOTES IN MECHANICAL ENGINEERING}, volume = {Vehicle and Automotive Engineering 4}, unique-id = {33089329}, issn = {2195-4356}, year = {2022}, eissn = {2195-4364}, pages = {212-222}, orcid-numbers = {Sarka, Ferenc/0000-0003-3136-4248} }