TY - JOUR AU - Gu, Huiqing AU - Wang, Liping AU - Guo, Kean TI - A novel method for trochoidal milling tool path tailoring based on curvature variation JF - JOURNAL OF MANUFACTURING PROCESSES J2 - J MANUFACT PROCES VL - 119 PY - 2024 SP - 531 EP - 549 PG - 19 SN - 1526-6125 DO - 10.1016/j.jmapro.2024.03.106 UR - https://m2.mtmt.hu/api/publication/34779348 ID - 34779348 LA - English DB - MTMT ER - TY - JOUR AU - Kónya, Gábor AU - Kovács, Zsolt Ferenc TI - Experimental investigation of the effects of cooling-lubricating methods on the slot milling process of GTD-111 type nickel-based superalloy JF - JOURNAL OF MANUFACTURING PROCESSES J2 - J MANUFACT PROCES VL - 119 PY - 2024 SP - 98 EP - 108 PG - 11 SN - 1526-6125 DO - 10.1016/j.jmapro.2024.03.074 UR - https://m2.mtmt.hu/api/publication/34758601 ID - 34758601 LA - English DB - MTMT ER - TY - JOUR AU - Chakraborty, Tathagata AU - Panda, Chinmaya AU - Umap, Nitin TI - Simulation-Driven Computation of High-Speed Pocket Machining Toolpaths JF - COMPUTER-AIDED DESIGN AND APPLICATIONS J2 - COMPUT-AIDED DES APPL VL - 21 PY - 2023 IS - 1 SP - 88 EP - 103 PG - 16 SN - 1686-4360 DO - 10.14733/cadaps.2024.88-103 UR - https://m2.mtmt.hu/api/publication/34221548 ID - 34221548 LA - English DB - MTMT ER - TY - JOUR AU - Kónya, Gábor AU - Kovács, Zsolt Ferenc TI - Effects of Machining Parameters and Tool Reconditioning on Cutting Force, Tool Wear, Surface Roughness and Burr Formation in Nickel-Based Alloy Milling JF - MATERIALS J2 - MATERIALS VL - 16 PY - 2023 IS - 22 SN - 1996-1944 DO - 10.3390/ma16227140 UR - https://m2.mtmt.hu/api/publication/34314486 ID - 34314486 LA - English DB - MTMT ER - TY - JOUR AU - Geier, Norbert AU - Xu, Jinyang AU - Poór, Dániel István AU - Dege, Jan Hendrik AU - Davim, J Paulo TI - A review on advanced cutting tools and technologies for edge trimming of carbon fibre reinforced polymer (CFRP) composites JF - COMPOSITES PART B-ENGINEERING J2 - COMPOS PART B-ENG VL - 266 PY - 2023 PG - 19 SN - 1359-8368 DO - 10.1016/j.compositesb.2023.111037 UR - https://m2.mtmt.hu/api/publication/34186019 ID - 34186019 N1 - Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Manufacturing Science and Engineering, Budapest, 1111, Hungary Shanghai Jiao Tong University, School of Mechanical Engineering, State Key Laboratory of Mechanical System and Vibration, Shanghai, 200240, China Hamburg University of Technology, Institute of Production Management and -Technology (IPMT), Hamburg, 21073, Germany University of Aveiro, Department of Mechanical Engineering, Centre for Mechanical Engineering and Automation (TEMA), Campus Santiago, Aveiro, 3810-193, Portugal Export Date: 19 October 2023 CODEN: CPBEF Correspondence Address: Geier, N.; Budapest University of Technology and Economics, Hungary; email: geier.norbert@gpk.bme.hu Correspondence Address: Xu, J.; Shanghai Jiao Tong University, China; email: xujinyang@sjtu.edu.cn LA - English DB - MTMT ER - TY - JOUR AU - Jacsó, Ádám AU - Ladó, Zoltán AU - Phanden, Rakesh Kumar AU - Sikarwar, Basant Singh AU - Singh, Rajeev Kumar TI - Bézier curve-based trochoidal tool path optimization using stochastic hill climbing algorithm JF - MATERIALS TODAY: PROCEEDINGS J2 - MATER TOD PROC VL - 78 PY - 2023 IS - Part 3 SP - 633 EP - 639 PG - 7 SN - 2214-7853 DO - 10.1016/j.matpr.2022.12.056 UR - https://m2.mtmt.hu/api/publication/33539414 ID - 33539414 N1 - Department of Manufacturing Sciences and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary Department of Mechanical Engineering, Amity School of Engineering & Technology, Amity University, Uttar Pradesh, Noida, India Correspondence Address: Jacso, A.; Department of Manufacturing Sciences and Engineering, Hungary; email: jacso.adam@gpk.bme.hu AB - Trochoidal milling is a widely used technique in high-speed machining. In the recent period, several theoretical and experimental studies have been performed to analyze the cutting process in trochoidal milling of slot-like geometries. However, these works typically focused only on cycloid- and circular-shaped trochoidal strategies and did not consider the possibilities of path shape optimization. This is because optimizing the trochoidal tool path is a double challenge: (1) modelling of material removal process is necessary to satisfy the geometrical and technological conditions, and (2) the relationship between tool path shape and machining efficiency is highly complex; therefore, direct optimization solutions cannot be applied. This paper presents a new Bézier curve-based tool path modelling technique and a new stochastic hill climbing algorithm-based optimization method to increase the efficiency of trochoidal strategy. During the tool path shape optimization, the limiting factors of cutter engagement and path curvature radius were also considered to meet the criteria of high-speed machining. The simulation experiments proved that the machining efficiency could be increased significantly by optimizing the trochoidal tool path by up to 40%, compared to the traditional cycloid strategy. The cutting experiments verified that the tool load remained well controlled, and productivity could be improved without increasing the tool load. The paper also discusses the appropriate settings to ensure the best functioning of the stochastic hill climbing algorithm. The industrial application of the developed algorithm can result in significant cost, energy and time savings for manufacturers when machining slot-like geometries. LA - English DB - MTMT ER - TY - JOUR AU - Jacsó, Ádám AU - Szalay, Tibor AU - Sikarwar, Basant Singh AU - Phanden, Rakesh Kumar AU - Singh, Rajeev Kumar AU - Ramkumar, Janakarajan TI - Investigation of conventional and ANN-based feed rate scheduling methods in trochoidal milling with cutting force and acceleration constraints JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 127 PY - 2023 SP - 487 EP - 506 PG - 20 SN - 0268-3768 DO - 10.1007/s00170-023-11506-x UR - https://m2.mtmt.hu/api/publication/33834311 ID - 33834311 N1 - Funding Agency and Grant Number: Budapest University of Technology and Economics; NRDI Fund (TKP2020 NC) under Ministry for Innovation and Technology [BME-NC]; European Commission [739592]; Hungarian National Research, Development and Innovation Office (NKFIH) [20171.3.1-VKE-201700029]; Hungarian State Eoetvoes Scholarship Funding text: Open access funding provided by Budapest University of Technology and Economics. The research reported in this paper and carried out at BME has been 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. The work for this paper was supported by the European Commission through the H2020 project EPIC under grant No. 739592, the 2017-1.3.1-VKE-2017-00029 grant of the Hungarian National Research, Development and Innovation Office (NKFIH), and the Hungarian State Eoetvoes Scholarship. AB - In CNC milling, the feed rate scheduling is a frequently used method to increase machining quality and efficiency. Among the benefits of feed rate scheduling, this paper focuses on controlling the tool load and optimizing the machining time. Although the advantages of feed rate scheduling are undeniable, some areas remain still to be addressed. In order to control the tool load, geometric methods are often used, which are based on keeping a specific parameter, such as chip thickness or material removal rate (MRR) constant. However, a high level of tool load control can only be provided if cutting force models or experimental-based techniques are used. Besides traditional methods, this paper presents an artificial neural network (ANN)-based feed rate scheduling method to keep the tool load constant, using data gained by preliminary cutting experiments. A case study demonstrates that a significantly higher level of tool load control can be achieved with this method as compared to the geometric models. Besides controlling the tool load, the present feed rate scheduling method also addresses the consideration of acceleration limits which is of great importance for practical uses. The application of feed rate scheduling in trochoidal milling is also discussed in detail in this paper. This area has not received enough attention, as due to the limited fluctuation of cutter engagement, the tool load was considered as well-controlled. However, experiments have shown that in the case of trochoidal milling, the introduction of feed rate scheduling can still further increase the machining efficiency. Using the developed ANN-based feed rate scheduling method, significant progress could be made as compared to conventional technologies in controlling the cutting force and optimizing the machining time. In the present case study, a reduction of 50% in machining time was achievable by adjusting the feed rate without increasing the peak value of cutting force. LA - English DB - MTMT ER - TY - JOUR AU - Kónya, Gábor AU - Kovács, Zsolt Ferenc AU - Sándor, Roland TI - 2,5D-s trochoidális stratégiák hatásai a forgácsolási folyamatra. The effects of 2,5D trochoidal strategies on the cutting process TS - The effects of 2,5D trochoidal strategies on the cutting process JF - GRADUS J2 - GRADUS VL - 10 PY - 2023 IS - 1 SN - 2064-8014 DO - 10.47833/2023.1.ENG.011 UR - https://m2.mtmt.hu/api/publication/33805919 ID - 33805919 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Kónya, Gábor AU - Kovács, Zsolt Ferenc AU - Takács, János TI - A szerszáméltartamot befolyásoló tényezők nikkel-bázisú szuperötvözetek horonymarásakor JF - GRADUS J2 - GRADUS VL - 10 PY - 2023 IS - 2 PG - 19 SN - 2064-8014 DO - 10.47833/2023.2.ENG.005 UR - https://m2.mtmt.hu/api/publication/34186835 ID - 34186835 AB - Jelen publikációban a szerszáméltartamot befolyásoló tényezőket mutatjuk be, rendszerezzük és illesztjük Nikkelbázisú szuperötvözetekhez annak érdekében, hogy a kutatási célok egyértelműen meghatározhatók legyenek. Ehhez először feltárjuk a megmunkálandó alapanyag tulajdonságait, melyhez a többi tényezőt illeszteni tudjuk. Továbbiakban feltárjuk, hogy az adott területeken mások mit értek el, mik az előnyeik és meghatározásra kerülnek azon területek, melyeket vizsgálni kell. In this paper, the factors influencing tool life are presented, systematized and matched to nickel-based superalloys in order to clearly define the research objectives. To do this, we first explore the properties of the material to be machined, to which the other factors can be fitted. We will then explore what others have achieved in these areas, what their advantages are and identify the areas that need to be investigated. LA - Hungarian DB - MTMT ER - TY - JOUR AU - Kónya, Gábor AU - Kovács, Zsolt Ferenc TI - The Comparison of Effects of Liquid Carbon Dioxide and Conventional Flood Cooling on the Machining Conditions During Milling of Nickel-based Superalloys JF - PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING J2 - PERIOD POLYTECH MECH ENG VL - 67 PY - 2023 IS - 3 SP - 190 EP - 196 PG - 7 SN - 0324-6051 DO - 10.3311/PPme.22265 UR - https://m2.mtmt.hu/api/publication/34066266 ID - 34066266 AB - In this scientific study, the authors have dealt with the slot milling of nickel-based superalloys. These alloys are among the most difficult materials to machine and are widely used in aerospace and energy industries. Due to the properties of the material, slot milling is a particular problem because tool wear happens quickly, and tool breakages are common. When these superalloys are machined, very high temperatures occur in the cutting zone, which cannot leave due to the extremely poor thermal conductivity of the material and will therefore transfer to the edges of the cutting tool, causing it to anneal, break off and fail. So, the researchers initiated a new field of research: cryogenically-assisted machining. In this paper, the authors used two cooling methods, the conventional flood cooling and cryogenic cooling with liquid carbon-dioxide (LCO2). The effects of these cooling methods were tested focusing on the cutting forces, tool wear, chip morphology and surface roughness of the bottom of the slots. The aim was to determine the best cooling methods for these materials. Based on the results, it can be concluded that, LCO2 has a negative effect on cutting forces, tool life and surface roughness. It only has a positive effect on chip formation. It can be see that, the lubricating effect has a greater impact on tool life, tool load and surface roughness of the milled slots than cooling. LA - English DB - MTMT ER - TY - JOUR AU - Pawar, Shrikant Shankarrao AU - Bera, Tufan Chandra AU - Sangwan, Kuldip Singh TI - Towards energy efficient milling of variable curved geometries JF - JOURNAL OF MANUFACTURING PROCESSES J2 - J MANUFACT PROCES VL - 94 PY - 2023 SP - 497 EP - 511 PG - 15 SN - 1526-6125 DO - 10.1016/j.jmapro.2023.03.078 UR - https://m2.mtmt.hu/api/publication/33754902 ID - 33754902 LA - English DB - MTMT ER - TY - CHAP AU - Predrag, Mitić AU - Marija, Zahar Đorđević AU - Vuk, Petronijević AU - Nebojša, Abadić AU - Aleksandar, Đorđević ED - Stefanović, M ED - Đorđević, A TI - Automatic Tool Path Generation in Contour Milling Using Genetic Algorithm T2 - Quality Festival 2023, 14. International Quality Conference PB - Center for Quality CY - Kragujevac SN - 9788663351042 PY - 2023 SP - 663 EP - 680 PG - 18 UR - https://m2.mtmt.hu/api/publication/34022106 ID - 34022106 AB - The purpose of this paper is to present new approach in automatic tool path generation in contour milling based on genetic algorithm and bitmap representation of work piece and additional resources. It deals with the problem of tool path generation and optimization in contour milling which is the most common case in metalworking industry. The starting point is assumption that the geometry of initial working piece, machined part and clamping fixtures is represented as bitmaps, then the mathematical model is presented and genetic algorithm is used to generate and optimize tool path. Proposed approach greatly reduced the costs of part production through improved machining efficiency, realized through independent software solution implemented in object-oriented language Delphi and can be used as starting point for fully autonomous NC code generation. LA - English DB - MTMT ER - TY - JOUR AU - Wagih, Mohamed AU - Maher, Ibrahem AU - El-Hofy, Hassan AU - Yan, Jiwang AU - Hassan, Mohsen A. TI - Analysis and development of elliptical tool path in trochoidal milling JF - CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY J2 - CIRP J MANUF SCI TECHNOL VL - 47 PY - 2023 SP - 168 EP - 183 PG - 16 SN - 1755-5817 DO - 10.1016/j.cirpj.2023.10.002 UR - https://m2.mtmt.hu/api/publication/34207050 ID - 34207050 LA - English DB - MTMT ER - TY - JOUR AU - Wang, Dongkai TI - Research on surface integrity and its influencing factors in the high-speed cutting of typical aluminum/titanium/nickel alloys: a review JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL PY - 2023 SN - 0268-3768 DO - 10.1007/s00170-023-11808-0 UR - https://m2.mtmt.hu/api/publication/34041545 ID - 34041545 LA - English DB - MTMT ER - TY - JOUR AU - Zhou, Xu AU - Zhou, Jinhua AU - Qi, Qi AU - Zhang, Congpeng AU - Zhang, Dinghua TI - Effects of Toolpath Parameters on Engagement Angle and Cutting Force in Ellipse-Based Trochoidal Milling of Titanium Alloy Ti-6Al-4V JF - APPLIED SCIENCES-BASEL J2 - APPL SCI-BASEL VL - 13 PY - 2023 IS - 11 SN - 2076-3417 DO - 10.3390/app13116550 UR - https://m2.mtmt.hu/api/publication/33914980 ID - 33914980 AB - Trochoidal milling is an efficient strategy for the rough machining of difficult-to-cut materials. The true trochoidal toolpath has C2 continuity and avoids sharp changes in engagement angle and cutting load, resulting in smooth machine tool movement. However, its total length is too long, and its engagement angle is uneven. These factors limit further improvements in the material removal rate. Based on the true trochoidal toolpath model, this paper develops an ellipse-based trochoidal toolpath generation method by introducing a compression ratio in the trochoidal step direction. The analytical model of engagement angle and the mechanistic model of the cutting force are proposed. A series of simulations and milling experiments were conducted to analyze the effects of toolpath parameters on the engagement angle and the cutting force. The results show that the compression ratio has the most significant effects. A compression ratio of 50% is optimal, using which the total toolpath length is reduced by 34.0%, and the variance of the engagement angle is reduced by 31.2% compared with that of the true trochoidal toolpath. The profile of the total cutting force corresponds to that of the engagement angle. LA - English DB - MTMT ER - TY - JOUR AU - Brecher, Christian AU - Ochel, Janis AU - Fey, Marcel TI - Datengetriebene Werkzeugeingriffsdetektion für Fräsprozesse JF - ZEITSCHRIFT FUR WIRTSCHAFTLICHEN FABRIKBETRIEB J2 - ZWF Z WIRTSCH FABR BETR VL - 117 PY - 2022 IS - 11 SP - 784 EP - 789 PG - 6 SN - 0947-0085 DO - 10.1515/zwf-2022-1146 UR - https://m2.mtmt.hu/api/publication/33295840 ID - 33295840 AB - Produzierende Unternehmen erfassen Daten der Werkzeugmaschine während der Bearbeitung. Werkzeugeingriffe, also Prozessabschnitte mit Materialabtrag, liefern relevante Informationen für Prozessoptimierungen, sind aber nur implizit in maschineninternen Daten enthalten. Bestehende Ansätze zur Eingriffsidentifikation sind meist simulationsbasiert oder bedürfen externer Sensorik. In diesem Beitrag wird ein anwendungsorientierter Ansatz zur datengetriebenen Werkzeugeingriffsdetektion vorgestellt. LA - German DB - MTMT ER - TY - JOUR AU - Jacsó, Ádám AU - Sikarwar, Basant Singh AU - Phanden, Rakesh Kumar AU - Singh, Rajeev Kumar AU - Ramkumar, Janakarajan AU - Sahu, Govind N. TI - Optimisation of tool path shape in trochoidal milling using B-spline curves JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 121 PY - 2022 SP - 3801 EP - 3816 PG - 16 SN - 0268-3768 DO - 10.1007/s00170-022-09527-z UR - https://m2.mtmt.hu/api/publication/32915679 ID - 32915679 N1 - Funding Agency and Grant Number: Budapest University of Technology and Economics; NRDI Fund [BME-NC]; Ministry for Innovation and Technology; European Commission [739592]; Hungarian National Research, Development and Innovation Office (NKFIH) [2017-1.3.1-VKE-2017-00029]; Hungarian State Eotvos Scholarship Funding text: Open access funding provided by Budapest University of Technology and Economics. The research reported in this paper and carried out at BME has been 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. Work for this paper was supported by the European Commission through the H2020 project EPIC under grant no. 739592, the 2017-1.3.1-VKE-2017-00029 grant of the Hungarian National Research, Development and Innovation Office (NKFIH), and the Hungarian State Eotvos Scholarship. LA - English DB - MTMT ER - TY - CHAP AU - Kónya, Gábor AU - Kovács, Zsolt Ferenc AU - Kókai, Eszter ED - Szakál, Anikó TI - Milling of Nickel-based Superalloy by Trochoidal Strategies T2 - IEEE Joint 22nd International Symposium on COMPUTATIONAL INTELLIGENCE and INFORMATICS and 8th International Conference on Recent Achievements in Mechatronics, Automation, Computer Science and Robotics (CINTI-MACRo 2022) PB - IEEE Hungary Section CY - Budapest SN - 9798350398823 PY - 2022 SP - 1 EP - 6 PG - 6 DO - 10.1109/CINTI-MACRo57952.2022.10029453 UR - https://m2.mtmt.hu/api/publication/33623710 ID - 33623710 LA - English DB - MTMT ER - TY - JOUR AU - Albertelli, Paolo AU - Mussi, Valerio AU - Strano, Matteo AU - Monno, Michele TI - Experimental investigation of the effects of cryogenic cooling on tool life in Ti6Al4V milling JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL PY - 2021 PG - 13 SN - 0268-3768 DO - 10.1007/s00170-021-07161-9 UR - https://m2.mtmt.hu/api/publication/32405623 ID - 32405623 AB - In this paper, the results of an experimental campaign of cryogenic milling are presented and discussed. For this purpose, a specific experimental setup that allowed to feed the liquid nitrogen LN through the tool nozzles was used. Tool life tests were carried out at different cutting speeds. The tool duration data were collected and used to identify the parameters of the Taylor's model. Different end-of-life criteria for the tool inserts were even investigated. The achieved results are compared to those obtained using conventional cooling. It was observed that at low cutting velocity, conventional cooling still assures longer tool lives than in cryogenic condition. Since in cryogenic milling the increasing of the cutting velocity is not so detrimental as in conventional cutting, at high cutting speed (from 125 m/min) longer tool durations can be achieved. Statistical analyses on the model parameters were carried out to confirm the presented findings. The analysis of the effect of the cooling approach on the main wear mechanisms was also reported. At low cutting speed, adhesion and chipping phenomena affected the tool duration mainly in cryogenic milling. 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 - García-Hernández, César AU - Garde-Barace, Juan-José AU - Valdivia-Sánchez, Juan-Jesús AU - Ubieto-Artur, Pedro AU - Bueno-Pérez, José-Antonio AU - Cano-Álvarez, Basilio AU - Alcázar-Sánchez, Miguel-Ángel AU - Valdivia-Calvo, Francisco AU - Ponz-Cuenca, Rubén AU - Huertas-Talón, José-Luis AU - Kyratsis, Panagiotis TI - Trochoidal Milling Path with Variable Feed. Application to the Machining of a Ti-6Al-4V Part JF - MATHEMATICS J2 - MATHEMATICS-BASEL VL - 9 PY - 2021 IS - 21 SP - 2701 SN - 2227-7390 DO - 10.3390/math9212701 UR - https://m2.mtmt.hu/api/publication/32468931 ID - 32468931 LA - English DB - MTMT ER - TY - CHAP AU - Jacsó, Ádám AU - Mátyási, Gyula AU - Szalay, Tibor ED - Phanden, Rakesh Kumar ED - Mathiyazhagan, K ED - Kumar, Ravinder ED - Davim, J Paulo TI - Trochoidal tool path planning method for slot milling with constant cutter engagement T2 - Advances in Industrial and Production Engineering PB - Springer-Verlag Singapore CY - Singapore SN - 9789813343207 T3 - Lecture Notes in Mechanical Engineering, ISSN 2195-4356 PY - 2021 SP - 659 EP - 668 PG - 8 DO - 10.1007/978-981-33-4320-7_59 UR - https://m2.mtmt.hu/api/publication/31830083 ID - 31830083 AB - For high-speed machining, special tool paths are required wherewith the tool load is well-controlled, and the path is sufficiently smooth. One of the most effective solutions for controlling the tool load is to keep the cutter engagement constant. For this purpose, advanced tool path generating cycles are available in CAM systems. In case of slot machining, these cycles result in a trochoidal tool path. Since the CAM systems generate these tool paths regardless of the special geometric boundary conditions, each trochoidal period must be calculated separately. However, in our previous researches, it has been observed that the loops of the trochoidal tool path which provide a constant cutter engagement become uniform after a few periods. In this paper, a new method is presented, which can be used for generating this uniform trochoidal tool path shape. The developed method was compared to conventional trochoidal strategies, that were using circular or cycloid curves, and it proved to be significantly better than the traditional solutions. Considering its improved machining efficiency, simplifying the calculation process of this modern strategy can facilitate a wider use. In addition, the formal description of the path generation method provides further opportunities for optimisation. LA - English DB - MTMT ER - TY - JOUR AU - Kuppuswamy, R. AU - Jani, F. AU - Naidoo, S. AU - de, Jongh Q. TI - A study on intelligent grinding systems with industrial perspective JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 115 PY - 2021 SP - 3811 EP - 3827 PG - 17 SN - 0268-3768 DO - 10.1007/s00170-021-07315-9 UR - https://m2.mtmt.hu/api/publication/32082713 ID - 32082713 AB - The digitization thrust on high-value manufacturing and services opens up new opportunities for ensuring total system uptime, reliability, and efficiency particularly for mission-critical high-value assets. The digitization process evolves intelligent manufacturing systems (IMS) which transforms maintenance into predictive reliability for achieving consistent quality throughout manufacturing process. This article unveils the intelligent grinding systems (IGS) for challenging grinding applications. In order to provide a better chance for value addition, previous work has been scrutinized extensively in the following aspects: grinding models, process design algorithms, and process monitoring. This then leads into an analysis of various previously designed IGS. The main focus, especially in the early 2000s, was mainly database development and parameter selection, which then shifted to process monitoring and control as particular technology advances were made. In the various goals that were investigated, it was evident that researchers were aiming for an online real-time system. This notion was driven by the advances in artificial intelligence and improved monitoring sensors, for example, acoustic emission sensors and even other unusual sensors like microphones for more economical and improved data collection and analysis. Although tremendous strides have been made, a substantial amount of work is still required in achieving a full-fledged real-time intelligent grinding system. The comprehensive findings on IGS system concludes that the real-time process update has been improved from few hours to milliseconds. © 2021, The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature. LA - English DB - MTMT ER - TY - JOUR AU - Thien, Austen AU - Saldana, Christopher AU - Kurfess, Thomas TI - Surface Qualification Toolpath Optimization for Hybrid Manufacturing JF - JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING J2 - J MANUF MATER PROC VL - 5 PY - 2021 IS - 3 PG - 16 SN - 2504-4494 DO - 10.3390/jmmp5030094 UR - https://m2.mtmt.hu/api/publication/32405621 ID - 32405621 AB - Hybrid manufacturing machine tools have great potential to revolutionize manufacturing by combining both additive manufacturing (AM) and subtractive manufacturing (SM) processes on the same machine tool. A prominent issue that can occur when going from AM to SM is that the SM process toolpath does not account for geometric discrepancies caused by the previous AM step, which leads to increased production times and tool wear, particularly when wire-based directed energy deposition (DED) is used as the AM process. This work discusses a methodology for approximating a part's surface topology using on-machine contact probing and formulating an optimized SM toolpath using the surface topology approximation. Three different geometric surface approximations were used: triangular, trapezoidal, and a hybrid of both. SM toolpaths were created using each geometric approximation and assessed according to three objectives: reducing total machining time, reducing surface roughness, and reducing cutting force. Different prioritization scenarios of the optimization goals were also investigated. The optimal surface approximation that yielded the most improvement in the optimization was determined to be the hybrid surface topology approximation. Furthermore, it was shown that when the machining time or cutting force optimization goals were prioritized, there was little improvement in the other optimization goals. LA - English DB - MTMT ER - TY - JOUR AU - Balázs, Barnabás Zoltán AU - Takács, Márton TI - Experimental investigation and optimisation of the micro milling process of hardened hot-work tool steel JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 106 PY - 2020 SP - 5289 EP - 5305 PG - 17 SN - 0268-3768 DO - 10.1007/s00170-020-04991-x UR - https://m2.mtmt.hu/api/publication/31165128 ID - 31165128 LA - English DB - MTMT ER - TY - CONF AU - Jacsó, Ádám AU - Mátyási, Gyula AU - Szalay, Tibor ED - Barabás, István TI - A kontaktszög meghatározásának geometriai módszerei marásnál 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 - 149 EP - 152 PG - 4 UR - https://m2.mtmt.hu/api/publication/31353754 ID - 31353754 AB - A 2.5D-s nagyolási műveleteknél napjainkban is elterjedten használják a kontúrpárhuzamos marási stratégiát. Az egyenközű szerszámpályák esetén azonban a szerszám terhelése erősen függ a kontúr alakjától. A cikkben bemutatjuk, hogy különböző kontúrmarási viszonyok esetén hogyan írható le a munkadarab és a szerszám kapcsolódási viszonyait jellemző kontaktszög értéke. LA - Hungarian DB - MTMT ER - TY - JOUR AU - Jacsó, Ádám AU - Szalay, Tibor TI - Optimizing the numerical algorithm in Fast Constant Engagement Offsetting Method for generating 2.5D milling tool paths JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 108 PY - 2020 IS - 1 SP - 2285 EP - 2300 PG - 16 SN - 0268-3768 DO - 10.1007/s00170-020-05452-1 UR - https://m2.mtmt.hu/api/publication/31353802 ID - 31353802 AB - In the case of 2.5D rough milling operations, machining efficiency can significantly be increased by providing a uniform tool load. This is underpinned by the fact that uniform load has a positive effect on both tool life and machining time. Unfortunately, conventional contour-parallel tool paths are unable to guarantee uniform tool loads. However, nowadays there are some advanced path generation methods which can offer a constant tool load by controlling the cutter engagement angle. Yet, the spread of these non-equidistant offsetting methods is hindered by their dependence on complex calculations. As a solution to this problem, the Fast Constant Engagement Offsetting Method (FACEOM), developed in the scope of our previous study, is seen to be taking a step towards reducing computational needs. In this paper, suggestions for further improvements of FACEOM are presented. Decreasing the number of path points to be calculated is made possible by implementing adaptive step size and spline interpolation. Through simulation tests, it was also analysed which of the numerical methods utilized for solving boundary value problems can be applied to obtain the shortest calculation time during tool path generation. The practical applicability of the algorithm has been proved by cutting experiments. With respect to research results, this paper also describes how a tool path created by the algorithm can be adapted to controllers of CNC machine tools. Solutions presented in this paper can promote a wider application of a modern path generation method that ensures constant tool loads. LA - English DB - MTMT ER -