TY - JOUR AU - Karkalos, Nikolaos E AU - Markopoulos, Angelos P AU - Kundrák, János TI - Molecular Dynamics Model of Nano-metric Peripheral Grinding JF - PROCEDIA CIRP J2 - PROCEDIA CIRP VL - 58 PY - 2017 IS - 58 SP - 281 EP - 286 PG - 6 SN - 2212-8271 DO - 10.1016/j.procir.2017.03.189 UR - https://m2.mtmt.hu/api/publication/3267843 ID - 3267843 AB - Ultra high precision grinding can render sub-micrometric surface finish of workpieces in an effective way. Accordingly, grinding in the nano-level can be used to produce surface finish of nanometric level or removal of several atomic layers of the substrate. As direct measurements in this scale are either expensive or impossible to be conducted, appropriate simulation models need to be created in order to study the underlying mechanisms of nanometric machining processes. Molecular Dynamics (MD) method is a widely accepted simulation method for this purpose, as it enables direct observation of the process at atomistic level. In this study, an MD simulation of nanometric peripheral grinding with two single crystal diamond grains is conducted with a view to determine cutting forces and temperatures as well as surface integrity and subsurface damage in the workpiece. Using this model, favourable cutting conditions for this process will be able to be determined. LA - English DB - MTMT ER - TY - JOUR AU - Felhő, Csaba AU - Bernhard, Karpuschewski AU - Kundrák, János TI - Surface roughness modelling in face milling JF - PROCEDIA CIRP J2 - PROCEDIA CIRP VL - 31 PY - 2015 SP - 136 EP - 141 PG - 6 SN - 2212-8271 DO - 10.1016/j.procir.2015.03.075 UR - https://m2.mtmt.hu/api/publication/2909821 ID - 2909821 LA - English DB - MTMT ER - TY - JOUR AU - Koritárné Fótos, Réka AU - Koncsik, Zsuzsanna AU - Lukács, János TI - Conception of materials data collection for numerical modelling of technological processes JF - PRODUCTION PROCESSES AND SYSTEMS J2 - PROD PROC SYST (MISKOLC) VL - 6 PY - 2012 SP - 107 EP - 114 PG - 8 SN - 1786-7983 UR - https://m2.mtmt.hu/api/publication/2911255 ID - 2911255 LA - English DB - MTMT ER - TY - BOOK AU - Lukács, János AU - Nagy, Gyula AU - Harmati, I AU - Koritárné Fótos, Réka AU - Koncsik, Zsuzsanna ED - Lukács, János TI - Szemelvények a mérnöki szerkezetek integritása témaköréből ET - 0 PB - Miskolci Egyetem CY - Miskolc PY - 2012 SP - 334 SN - 9789633580004 UR - https://m2.mtmt.hu/api/publication/2428401 ID - 2428401 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Altintas, Y AU - Stépán, Gábor AU - Merdol, D AU - Dombóvári, Zoltán TI - Chatter stability of milling in frequency and discrete time domain JF - CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY J2 - CIRP J MANUF SCI TECHNOL VL - 1 PY - 2008 IS - 1 SP - 35 EP - 44 PG - 10 SN - 1755-5817 DO - 10.1016/j.cirpj.2008.06.003 UR - https://m2.mtmt.hu/api/publication/1248263 ID - 1248263 AB - Chatter stability of milling operations has been gaining \nsignificant attention with a view to improving the material \nremoval rates in high speed machining of aluminum alloys and \nlow speed milling of difficult to cut, thermal resistant \nalloys. This paper presents frequency and discrete time domain \nchatter stability laws for milling operations in a unified \nmanner. The time periodic dynamics of the milling process are \nmodelled. By averaging time varying directional factors at \ncutter pitch intervals, the stability lobes are solved directly \nand analytically. When the process is highly intermittent, \nwhich occurs at high speeds and low radial depth of cuts, the \nstability lobes are more accurately solved either by taking \nhigher harmonics of directional factors in frequency domain, or \nby using semi-discretization method. This paper compares the \nstability solutions against the numerical solutions and \nexperiments, and provides comprehensive mathematical details of \nboth fundamental stability solutions. \n \n \n \n \n \n \n \n \n LA - English DB - MTMT ER - TY - JOUR AU - Insperger, Tamás AU - Stépán, Gábor AU - Bayly, PV AU - Mann, BP TI - Multiple chatter frequencies in milling processes JF - JOURNAL OF SOUND AND VIBRATION J2 - J SOUND VIB VL - 262 PY - 2003 IS - 2 SP - 333 EP - 345 PG - 13 SN - 0022-460X DO - 10.1016/S0022-460X(02)01131-8 UR - https://m2.mtmt.hu/api/publication/1148734 ID - 1148734 N1 - Megjegyzés-23771728 : Tamas/H-3748-2012 Export Date: 28 November 2019 CODEN: JSVIA Export Date: 29 November 2019 CODEN: JSVIA AB - Analytical and experimental identifications of the chatter frequencies in milling processes are presented. In the case of milling, there are several frequency sets arising from the vibration signals, as opposed to the single well-defined chatter frequency of the unstable turning process. Frequency diagrams are constructed analytically and attached to the stability charts of mechanical models of high-speed milling. The corresponding quasiperiodic solutions of the governing time-periodic delay-differential equations are also identified with some milling experiments in the case of highly intermittent cutting. (C) 2002 Elsevier Science Ltd. All rights reserved. LA - English DB - MTMT ER -