TY - JOUR AU - Kovács, Zsolt Ferenc AU - Viharos, Zsolt János AU - Kodácsy, János TI - Improvements of surface tribological properties by magnetic assisted ball burnishing JF - SURFACE AND COATINGS TECHNOLOGY J2 - SURF COAT TECH VL - 437 PY - 2022 PG - 12 SN - 0257-8972 DO - 10.1016/j.surfcoat.2022.128317 UR - https://m2.mtmt.hu/api/publication/32724905 ID - 32724905 LA - English DB - MTMT ER - TY - JOUR AU - Singh, S. K. AU - Mali, H. S. TI - Workpiece Dependency Exploration & Probabilistic Nonparametric Modelling of Vibration-Assisted Hybrid Micro-EDM Process JF - ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING J2 - ARAB J SCI ENG PY - 2022 PG - 15 SN - 2193-567X DO - 10.1007/s13369-022-06616-9 UR - https://m2.mtmt.hu/api/publication/33014653 ID - 33014653 AB - mu-EDM is one of the leading process used to fabricate micro-parts and features that find application in wide array of products such as MEMS devices and lab-on-chip systems. To mitigate limitations of mu-EDM, hybridization of the process is done using vibration assistance. However, ambiguity remains as to the extent of effect of hybridization on different materials. In this work, experimentations are performed to explore and assess whether the benefits, and disadvantages, of hybridization are dependent on type of material used. Three workpiece materials-AISI 316 SS, Co29Cr6Mo and BeCu, which have different thermal, electrical and mechanical properties are chosen. Microholes of varying depth are drilled at different vibration frequencies and discharge energies to assess the effect on machining time, tool wear and surface roughness. Thereafter process outputs are modelled using a nonparametric probabilistic method called Gaussian Process Regression and are validated on new design points. It is found that effect of vibration is highly material specific and benefit is mostly limited to reduction in machining time. Microscopic images of machined surface reveal extreme globule formation in AISI 316 SS and few micropores in Co29Cr6Mo. Gaussian Process Regression shows great capability to model seemingly stochastic output using limited training data. LA - English DB - MTMT ER - TY - JOUR AU - Balázs, Barnabás Zoltán AU - Geier, Norbert AU - Pereszlai, Csongor AU - Poór, Dániel István AU - Takács, Márton TI - Analysis of cutting force and vibration at micro-milling of a hardened steel JF - PROCEDIA CIRP J2 - PROCEDIA CIRP VL - 99 PY - 2021 SP - 177 EP - 182 PG - 6 SN - 2212-8271 DO - 10.1016/j.procir.2021.03.025 UR - https://m2.mtmt.hu/api/publication/31818823 ID - 31818823 N1 - Fraunhofer Joint Laboratory of Excellence on Advanced Production Technology (Fh-J_LEAPT Naples); International Academy for Production Engineering (CIRP) Conference code: 169041 Export Date: 18 January 2022 Correspondence Address: Balázs, B.Z.; Budapest University of Technology and Economics, Muegyetem rakpart. 3, Hungary; email: balazs@manuf.bme.hu Funding details: EU H2020-WIDESPREAD-01-2016-2017-TeamingPhase2-739592, K 132430 Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA Funding details: Innovációs és Technológiai Minisztérium Funding details: National Research, Development and Innovation Office Funding text 1: This research was partly supported by the ÚNKP-20-3 and ÚNKP-20-2 New National Excellence Program of the Ministry for Innovation and Technology, and by the project “Centre of Excellence in Production Informatics and Control” (EPIC) No. EU H2020-WIDESPREAD-01-2016-2017-TeamingPhase2-739592. The research work introduced herein was partly supported by the research project K 132430 (Transient deformation, thermal and tribological processes at fine machining of hard metal surfaces) provided by the National Research, Development and Innovation Office and by the NRDI Fund (TKP2020 IES,Grant No. BME-IE-NAT) based on the charter of bolster issued by the NRDI Office under the auspices of the Ministry for Innovation and Technology. The authors are grateful to the support by Fraisa and Böhler companies. In addition, we thank our colleague, Ádám Jacsó for supporting us during the measurements. AB - Micro-milling is a commonly used manufacturing method; however, it is a difficult-to-design process mainly due to the size effect. The main aim of this research is the analysis of the cutting forces, the vibrations, and the dominant frequencies of the micro-milling process in a hardened steel. Full factorial machining experiments were conducted using an AlTiN coated micro end mill. The cutting forces and vibrations were analysed and discussed in detail based on material removal mechanisms, tool deflections, and dynamical behaviours. Moreover, a novel cutting force model was developed, which is adequately able to predict and optimise the cutting force. LA - English DB - MTMT ER - TY - JOUR AU - Balázs, Barnabás Zoltán AU - Takács, Márton TI - Experimental investigation of the influence of cutting parameters on surface quality and on the special characteristics of micro-milled surfaces of hardened steels JF - PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE J2 - P I MECH ENG C-J MEC VL - 235 PY - 2021 IS - 23 SP - 6996 EP - 7008 PG - 13 SN - 0954-4062 DO - 10.1177/09544062211013064 UR - https://m2.mtmt.hu/api/publication/32021005 ID - 32021005 N1 - Funding Agency and Grant Number: NRDI Fund (TKP2020 NC) by the NRDI Office under Ministry for Innovation and Technology [BME-NC]; National Research, Development and Innovation Office (NKFIH)National Research, Development & Innovation Office (NRDIO) - Hungary [ED_18-22018-0006, OTKA-K-132430, UNKP-20-3] Funding text: The authors are grateful to the Bohler and Fraisa companies for their support and to Adam Jacso, Balazs Zsolt Farkas, Miklos Toth, Eva Fazakas, and Janos Endre Maroti for the assistance during the research. The authors would like to thank Szechenyi Istvan University, especially for Tamas Ibriksz and Hajnalka Hargitai for their assistance in confocal microscopic examinations. The research reported in this article has been partly supported by the NRDI Fund (TKP2020 NC, Grant No. BME-NC) based on the charter of bolster issued by the NRDI Office under the auspices of the Ministry for Innovation and Technology. This research was partly supported by the National Research, Development and Innovation Office (NKFIH) No. ED_18-22018-0006, OTKA-K-132430, and UNKP-20-3. LA - English DB - MTMT ER - TY - CONF AU - Balázs, Barnabás Zoltán AU - Takács, Márton ED - Barabás, István TI - A minimális forgácsvastagság vizsgálata edzett melegalakító szerszámacél mikromarása esetén T2 - XXVIII. Nemzetközi Gépészeti Konferencia – OGÉT 2020 PB - Erdélyi Magyar Műszaki Tudományos Társaság (EMT) C1 - Kolozsvár T3 - Nemzetközi Gépészeti Találkozó (OGÉT), ISSN 2068-1267 PY - 2020 SP - 29 EP - 32 PG - 4 UR - https://m2.mtmt.hu/api/publication/31296112 ID - 31296112 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Balázs, Barnabás Zoltán AU - Takács, Márton TI - A comparative analysis of characteristics of cutting forces at micro-milling of hardened steels JF - IOP CONFERENCE SERIES: MATERIALS SCIENCE AND ENGINEERING J2 - IOP CONF SER MATER SCI ENG VL - 903 PY - 2020 PG - 8 SN - 1757-8981 DO - 10.1088/1757-899X/903/1/012056 UR - https://m2.mtmt.hu/api/publication/31522173 ID - 31522173 N1 - Funding Agency and Grant Number: National Research, Development and Innovation Fund [TUDF0/51757/2019-ITM]; European Commission through the H2020 project EPIC [739592]; National Research, Development and Innovation OfficeNational Research, Development & Innovation Office (NRDIO) - Hungary [K 132430]; company Fraisa; company Baler Funding text: The research reported in this paper was partly supported by the National Research, Development and Innovation Fund (TUDF0/51757/2019-ITM, Thematic Excellence Program), and by the European Commission through the H2020 project EPIC under grant No. 739592. The research work introduced herein was partly supported by the research project K 132430 (Transient deformation, thermal and tribological processes at fine machining of hard metal surfaces) provided by the National Research, Development and Innovation Office. The authors gratefully thank the support of companies Fraisa and Baler. We especially thank the help of our colleague, Adam Jack) in this research. AB - Micro-milling is one of the most important technologies to produce miniature components. Mainly due to the size reduction, the process has many special characteristics, such as the relatively large tool run-out, the relatively large deformation and the cutting edge radius of the micro-milling tool. The cutting force is often correlated to the phenomena mentioned above, its analysis is therefore often required. The main objective of the present paper is to analyse and compare the characteristics of cutting forces in micro-milling of different hardened steels. A systematic series of experiments were conducted on a hardened AISI H13 hot-work tool steel and a Bohler M303 martensitic corrosion resistance steel. The hardness of both materials is 50 HRC. A 500 mu m diameter two fluted carbide micro end mill and a five-axis micromachining centre were applied. The effects of the cutting parameters are analysed by the analysis of variance (ANOVA). Experimental results show that the workpiece material has a significant influence on the cutting forces. LA - English DB - MTMT ER - TY - CHAP AU - Ali, Saad Mahmood ED - IEEE, Staff TI - Influence of Electrodes and Parameters on Micro-EDM Drilling Performances of 304L Stainless Steel T2 - 2019 2nd International Conference on Engineering Technology and its Applications (IICETA) PB - Institute of Electrical and Electronics Engineers (IEEE) CY - Al-Najef SN - 9781728141053 PY - 2019 SP - 55 EP - 60 PG - 6 DO - 10.1109/IICETA47481.2019.9012975 UR - https://m2.mtmt.hu/api/publication/31268406 ID - 31268406 LA - English DB - MTMT ER - TY - JOUR AU - Eltaggaz, Abdelkrem AU - Deiab, Ibrahim TI - Comparison of between direct and peck drilling for large aspect ratio in Ti-6Al-4V alloy JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 102 PY - 2019 IS - 9-12 SP - 2797 EP - 2805 PG - 9 SN - 0268-3768 DO - 10.1007/s00170-019-03314-z UR - https://m2.mtmt.hu/api/publication/31080811 ID - 31080811 AB - Drilling is a crucial cutting operation as it represents 40 to 60% of the total material removed in the aircraft frame industry. Drilling difficult-to-cut materials, such as Ti-6Al-4V, is still a challenge due to their high chemical reactivity with different tool materials and low thermal conductivity. The application of cooling approach is needed to reduce the generated cutting temperature at the machining area. However, in drilling, the coolant does not sufficiently reach to the drill tip at the cutting zone because of the counter flow of the chips limits further penetration, especially in deep-hole drilling. To overcome such problems during direct drilling, different drilling techniques are followed. Peck drilling is among these methods in which the drilling process is conducted in a number of steps to achieve holes with large aspect ratio. The current study presents a detailed comparison between direct drilling and peck drilling of Ti-6Al-4V in terms of tool life, surface roughness, thrust force, torque, and burr formation. In terms of flank wear, thrust force, and burr formation, peck drilling showed better results when compared to direct drilling; however, direct drilling offers slightly better results in terms of surface quality. LA - English DB - MTMT ER - TY - CHAP AU - Asma, Perveen AU - Carlo, Molardi ED - Kapil, Gupta TI - Machining of Microshapes and Features T2 - Micro and Precision Manufacturing PB - Springer Netherlands CY - Cham (Németország) SN - 9783319688015 PB - Springer Netherlands PY - 2018 SP - 1 EP - 19 PG - 19 DO - 10.1007/978-3-319-68801-5_1 UR - https://m2.mtmt.hu/api/publication/26875872 ID - 26875872 LA - English DB - MTMT ER - TY - JOUR AU - Ravisubramanian, S AU - Shunmugam, M S TI - Investigations into peck drilling process for large aspect ratio micro holes in aluminum 6061-T6 JF - MATERIALS AND MANUFACTURING PROCESSES J2 - MATER MANUF PROCESS VL - 33 PY - 2018 IS - 9 SP - 935 EP - 942 PG - 8 SN - 1042-6914 DO - 10.1080/10426914.2017.1376076 UR - https://m2.mtmt.hu/api/publication/26813643 ID - 26813643 LA - English DB - MTMT ER - TY - JOUR AU - Farkas, Balázs Zsolt AU - Csorba, László Vilmos AU - Szalay, Tibor AU - Valery, V Kuzin AU - Sergei, Yu Fedorov TI - The Influence of the Machining Parameters on the Quality of the Holes Made by μEDM in Electrically Conductive Alumina-Oxide JF - SOLID STATE PHENOMENA J2 - SOLID STATE PHENOM VL - 261 PY - 2017 SP - 101 EP - 107 PG - 7 SN - 1012-0394 DO - 10.4028/www.scientific.net/SSP.261.101 UR - https://m2.mtmt.hu/api/publication/3256362 ID - 3256362 LA - English DB - MTMT ER - TY - THES AU - Lorenzi, M TI - X-ray computed microtomography applications for complex geometries and multiphase flow PY - 2017 SP - 165 UR - https://m2.mtmt.hu/api/publication/27412412 ID - 27412412 LA - English DB - MTMT ER - TY - CHAP AU - Patra, Karali AU - Jha, Amit AU - Szalay, Tibor ED - Radionov, A A TI - Tool condition monitoring in micro-drilling using vibration signals and artificial neural network. TCM in micro-drilling using vibration signals TS - TCM in micro-drilling using vibration signals T2 - 2017 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM) PB - IEEE CY - Saint-Petersburg SN - 9781509056491 PY - 2017 SP - 1 EP - 5 PG - 5 DO - 10.1109/ICIEAM.2017.8076196 UR - https://m2.mtmt.hu/api/publication/3285187 ID - 3285187 LA - English DB - MTMT ER - TY - JOUR AU - Filip, Jovanović AU - Nenad, Milijić AU - Makedonka, Dimitrova AU - Ivan, Mihajlović TI - Risk Management Impact Assessment on the Success of Strategic Investment Projects. Benchmarking Among Different Sector Companies TS - Benchmarking Among Different Sector Companies JF - ACTA POLYTECHNICA HUNGARICA J2 - ACTA POLYTECH HUNG VL - 13 PY - 2016 IS - 5 SP - 221 EP - 241 PG - 21 SN - 1785-8860 DO - 10.12700/APH.13.5.2016.5.13 UR - https://m2.mtmt.hu/api/publication/26250398 ID - 26250398 LA - English DB - MTMT ER -