TY - JOUR AU - Jacsó, Ádám AU - Szalay, Tibor AU - Carlos Jauregui, Juan AU - Rodriguez Resendiz, Juvenal TI - A discrete simulation-based algorithm for the technological investigation of 2.5D milling operations JF - PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE J2 - P I MECH ENG C-J MEC VL - 233 PY - 2019 IS - 1 SP - 78 EP - 90 PG - 13 SN - 0954-4062 DO - 10.1177/0954406218757267 UR - https://m2.mtmt.hu/api/publication/30565263 ID - 30565263 AB - Many applications are available for the syntactic and semantic verification of NC milling tool paths in simulation environments. However, these solutions - similar to the conventional tool path generation methods - are generally based on geometric considerations, and for that reason they cannot address varying cutting conditions. This paper introduces a new application of a simulation algorithm that is capable of producing all the necessary geometric information about the machining process in question for the purpose of further technological analysis. For performing such an analysis, an image space-based NC simulation algorithm is recommended, since in the case of complex tool paths it is impossible to provide an analytical description of the process of material removal. The information obtained from the simulation can be used not only for simple analyses, but also for optimisation purposes with a view to increasing machining efficiency. LA - English DB - MTMT ER - TY - CHAP AU - Jacsó, Ádám AU - Szalay, Tibor ED - Adam, Hamrol ED - Olaf, Ciszak ED - Stanisław, Legutko ED - Mieczysław, Jurczyk TI - Analysing and Optimizing 2.5D Circular Pocket Machining Strategies T2 - Advances in Manufacturing PB - Springer Netherlands CY - Cham SN - 9783319686196 T3 - Lecture Notes in Mechanical Engineering, ISSN 2195-4356 PY - 2018 SP - 355 EP - 364 PG - 10 DO - 10.1007/978-3-319-68619-6_34 UR - https://m2.mtmt.hu/api/publication/3282441 ID - 3282441 LA - English DB - MTMT ER - TY - JOUR AU - Biró, István AU - Szalay, Tibor TI - Extension of empirical specific cutting force model for the process of fine chip-removing milling JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 88 PY - 2017 IS - 9 SP - 2735 EP - 2743 PG - 9 SN - 0268-3768 DO - 10.1007/s00170-016-8957-x UR - https://m2.mtmt.hu/api/publication/3077374 ID - 3077374 N1 - Funding Agency and Grant Number: CEEPUS III [HR 0108]; Hungarian-Mexican Bilateral Project [TeT-12_MX]; EUEuropean Commission [H2020-WIDESPREAD-2014-1-FPA-664403]; [TAMOP-4.2.2.B-10/1-2010-0009] Funding text: The work reported in this paper is connected to the project "Talent care and cultivation in the scientific workshops of BME" project. The project is supported by grant TAMOP-4.2.2.B-10/1-2010-0009. The authors would like to acknowledge the support provided by the CEEPUS III HR 0108 project. The current research is connected to the topic of the project TeT-12_MX Hungarian-Mexican Bilateral Project "Experimental and theoretical optimization and control of machining technology and tool path for micro milling". This research was partly supported by the EU H2020-WIDESPREAD-2014-1-FPA-664403 Teaming project "Centre of Excellence in Production Informatics and Control". The authors would also like to express their gratitude to Sumitomo Electric Hardmetal Ltd. for making the milling tool and inserts available for the purpose of the current study. AB - Specific cutting force is a frequently used parameter to classify and describe the energetic environment of mechanical machining operations. It defines the ratio of cutting forces and theoretical chip section during machining. This definition makes it possible to create general technological models for precise process planning. Classical models of cutting forces already indicate that specific cutting force cannot be modelled using a single low-level analytical function due to the marked presence of size effect. The problem is amplified in the case of micro-chip forming, where the relative scale of elastic and plastic deformations in the machined material differ from those experienced in conventional cutting conditions. Previous research proved that boundaries of specific cutting forces can be defined by values of exact uncut chip thicknesses, in which case the sections of specific cutting force may indicate different types of material deforming processes. The aim of current research presented in this paper is to extend the empirical model of specific cutting force for fine chip-removing cutting processes by identifying a new boundary section of uncut chip thickness. Therefore, a new boundary chip thickness was defined based on data obtained with reference to experimental cutting force. New boundary chip thickness follows the so-far proven tendencies of already known section borders and this enables the extension of the validity range of classical approaches presented by specific cutting force models beyond macro-scaled chip forming to micro-scaled chip forming processes. The extension of the model considers the effect of cutting parameters, primarily that of feed rate. LA - English DB - MTMT ER - TY - JOUR AU - Borsos, Benjámin AU - Csörgő, András AU - Hidas, Anna AU - Kotnyek, Bálint AU - Szabó, Antal AU - Kossa, Attila AU - Stépán, Gábor TI - Two-Dimensional Finite Element Analysis of Turning Processes JF - PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING J2 - PERIOD POLYTECH MECH ENG VL - 61 PY - 2017 IS - 1 SP - 44 EP - 54 PG - 11 SN - 0324-6051 DO - 10.3311/PPme.9283 UR - https://m2.mtmt.hu/api/publication/3178806 ID - 3178806 AB - Despite crucial efforts invested into computational methods, explicit dynamics simulation of cutting operations may still be unacceptably expensive. Therefore, in many cases a two- dimensional model is considered. Here an overview of the possibilities of two-dimensional simulations is given. For this, simulation and measurement of a straight turning process on AISI 1045 steel is presented. In the numerical analysis, material behavior and its failure was described by Johnson-Cook law, considering damage evolution. Coupled thermo-mechanical model with mass-scaling and adaptive remeshing was built. The numerically obtained cutting force was compared to the measured data. It was found that the forces obtained with simulation and the measured ones show good agreement. Sensitivity analyses were performed to examine the influence of specific parameters on the reaction force. The effect of these parameters is also shown. LA - English DB - MTMT ER - TY - JOUR AU - Póka, György AU - Németh, István AU - Mátyási, Gyula TI - Burr minimisation in face milling with optimised tool path JF - PROCEDIA CIRP J2 - PROCEDIA CIRP VL - 57 PY - 2016 SP - 653 EP - 657 PG - 5 SN - 2212-8271 DO - 10.1016/j.procir.2016.11.113 UR - https://m2.mtmt.hu/api/publication/3160524 ID - 3160524 LA - English DB - MTMT ER -