TY - JOUR AU - Ma, Qiyang AU - Zhong, Yuhao AU - Wang, Zimo AU - Bukkapatnam, Satish TI - Effect of Microstructure on the Machinability of Natural Fiber Reinforced Plastic Composites: A Novel Explainable Machine Learning (XML) Approach JF - JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME J2 - J MANUF SCI E-T ASME VL - 146 PY - 2024 IS - 3 PG - 14 SN - 1087-1357 DO - 10.1115/1.4064039 UR - https://m2.mtmt.hu/api/publication/34618853 ID - 34618853 AB - Natural fiber-reinforced plastic (NFRP) composites are ecofriendly and biodegradable materials that offer tremendous ecological advantages while preserving unique structures and properties. Studies on using these natural fibers as alternatives to conventional synthetic fibers in fiber-reinforced materials have opened up possibilities for industrial applications, especially for sustainable manufacturing. However, critical issues reside in the machinability of such materials because of their multiscale structure and the randomness of the reinforcing elements distributed within the matrix basis. This paper reports a comprehensive investigation of the effect of microstructure heterogeneity on the resultant behaviors of cutting forces for NFRP machining. A convolutional neural network (CNN) links the microstructural reinforcing fibers and their impacts on changing the cutting forces (with an estimated R-squared value over 90%). Next, a model-agnostic explainable machine learning approach is implemented to decipher this CNN black-box model by discovering the underlying mechanisms of relating the reinforcing elements/fibers' microstructures. The presented xml approach extracts physical descriptors from the in-process monitoring microscopic images and finds the causality of the fibrous structures' heterogeneity to the resultant machining forces. The results suggest that, for the heterogeneous fibers, the tightly and evenly bounded fiber elements (i.e., with lower aspect ratio, lower eccentricity, and higher compactness) strengthen the material and thereafter play a significant role in increasing the cutting forces during NFRP machining. Therefore, the presented framework of the explainable machine learning approach opens an opportunity to discover the causality of material microstructures on the resultant process dynamics and accurately predict the cutting behaviors during material removal processes. LA - English DB - MTMT ER - TY - JOUR AU - Geier, Norbert TI - An experimental study on the drilling of CFRP sandwich structures with filled and unfilled aramid honeycomb cores JF - JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING J2 - J BRAZ SOC MECH SCI VL - 45 PY - 2023 IS - 4 SN - 1678-5878 DO - 10.1007/s40430-023-04138-5 UR - https://m2.mtmt.hu/api/publication/33714770 ID - 33714770 N1 - Correspondence Address: Geier, N.; Department of Manufacturing Science and Engineering, Műegyetem rkp. 3., Hungary; email: geier.norbert@gpk.bme.hu AB - Lightweight carbon fibre-reinforced polymer (CFRP) sandwich structures with honeycomb cores have excellent specific bending stiffness and good dimensional stability; therefore, their future applications will extend extensively, despite their difficult-to-manufacture nature. Although the drilling of single CFRP structures has been widely investigated, the published experience of drilling honeycomb cored CFRP sandwich panels is strongly limited. Therefore, the main objective of the present paper is to experimentally analyse the machinability of CFRP sandwich panels with filled and unfilled aramid Cormaster honeycomb cores through the analysis of thrust force, drilling torque and drilling-induced burrs. A twist and a brad and spur drill were used in two sandwich structures at three feed levels for the drilling experiments. The thrust force and drilling torque were measured by a KISTLER dynamometer, and the burrs were processed through digital image processing of optically captured images. The experimental results show that the application of fillers in the honeycomb only slightly decreases the nominal specific stiffness of the CFRP/honeycomb sandwich structures and slightly increases the thrust force; however, a significant improvement is achievable by their application in the drilling-induced burr formation of the honeycomb core. 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 - CHAP AU - Palágyi, Imre AU - Biró, István AU - Szalay, Tibor ED - Kritskiy, Dmitriy ED - Pavlikov, Vladimir ED - Nechyporuk, Mykola TI - Estimation of the Minimum Uncut Chip Thickness Utilising Conventional Milling of S960QL and C45E Steels T2 - Integrated Computer Technologies in Mechanical Engineering - 2022 PB - Springer Nature Switzerland AG CY - Cham SN - 9783031362019 T3 - Lecture Notes in Networks and Systems, ISSN 2367-3370 ; 657. PY - 2023 SP - 29 EP - 38 PG - 10 DO - 10.1007/978-3-031-36201-9_3 UR - https://m2.mtmt.hu/api/publication/34074824 ID - 34074824 N1 - Export Date: 6 October 2023 Correspondence Address: Biró, I.; Department of Manufacturing Science and Engineering, Műegyetem Rakpart 3, Hungary; email: biro.istvan@gpk.bme.hu 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 - Lukács, Tamás AU - Pereszlai, Csongor AU - Geier, Norbert TI - Delamination measurement in glass fibre reinforced polymer (GFRP) composite based on image differencing JF - COMPOSITES PART B-ENGINEERING J2 - COMPOS PART B-ENG VL - 248 PY - 2023 PG - 12 SN - 1359-8368 DO - 10.1016/j.compositesb.2022.110381 UR - https://m2.mtmt.hu/api/publication/33199692 ID - 33199692 N1 - Export Date: 15 November 2022 CODEN: CPBEF Correspondence Address: Geier, N.; Budapest University of Technology and Economics, Műegyetem rkp. 3., Hungary; email: geier.norbert@gpk.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Chen, Xi AU - Zhang, Zhao AU - Wang, Qi AU - Zhang, Dinghua AU - Luo, Ming TI - A new method for prediction of cutting force considering the influence of machine tool system and tool wear JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 120 PY - 2022 IS - 3-4 SP - 1843 EP - 1852 PG - 10 SN - 0268-3768 DO - 10.1007/s00170-022-08891-0 UR - https://m2.mtmt.hu/api/publication/33315259 ID - 33315259 AB - Milling force can usually be predicted based on orthogonal cutting data by applying the classical oblique cutting transformation. However, the accuracy of the prediction is largely affected by the dynamic characteristics of the machine tool system and tool wear. This paper proposes a prediction method of cutting force considering the influence of machine tool system and tool wear to improve the accuracy of the conversion from orthogonal cutting to milling. First, the machine tool correction coefficients are used to introduce the influence of machine tool system into the orthogonal cutting force prediction model. Then, the influence of the tool wear is taken into account by defining the tool wear coefficients. Finally, the accuracy of the cutting force obtained by the proposed method is verified through experimental research. The results show that the prediction results are in good agreement with the experimental results. LA - English DB - MTMT ER - TY - JOUR AU - Geier, Norbert AU - Poór, Dániel István AU - Pereszlai, Csongor AU - Tamás-Bényei, Péter AU - Xu, Jinyang TI - A drilling case study in polymer composites reinforced by virgin and recycled carbon fibres (CFRP and rCFRP) to analyse thrust force and torque JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 120 PY - 2022 SP - 2603 EP - 2615 PG - 13 SN - 0268-3768 DO - 10.1007/s00170-022-08947-1 UR - https://m2.mtmt.hu/api/publication/32707479 ID - 32707479 N1 - Department of Manufacturing Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest, 1111, Hungary Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest, 1111, Hungary MTA–BME Research Group for Composite Science and Technology, Műegyetem rkp. 3, Budapest, 1111, Hungary State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China Correspondence Address: Geier, N.; Department of Manufacturing Science and Engineering, Műegyetem rkp. 3, Hungary; email: geier.norbert@gpk.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Lukács, Judit AU - Horváth, Richárd TI - Comprehensive Investigations of Cutting with Round Insert: Introduction of a Predictive Force Model with Verification JF - METALS J2 - METALS-BASEL VL - 12 PY - 2022 IS - 2 SP - 257 PG - 19 SN - 2075-4701 DO - 10.3390/met12020257 UR - https://m2.mtmt.hu/api/publication/32634901 ID - 32634901 LA - English DB - MTMT ER - TY - JOUR AU - Makkai, Tamás TI - A homlokmarás kutatásának főbb eredményei 1. rész: A forgácsolóerő vizsgálata JF - MULTIDISZCIPLINÁRIS TUDOMÁNYOK: A MISKOLCI EGYETEM KÖZLEMÉNYE J2 - MULTIDISZCIPLINÁRIS TUDOMÁNYOK VL - 12 PY - 2022 IS - 5 SP - 110 EP - 123 PG - 14 SN - 2062-9737 DO - 10.35925/j.multi.2022.5.11 UR - https://m2.mtmt.hu/api/publication/33596500 ID - 33596500 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Balázs, Barnabás Zoltán AU - Geier, Norbert AU - Poór, Dániel István AU - Pereszlai, Csongor AU - Takács, Márton TI - A fogásmélység hatása a mikroméretű forgácsleválasztás dinamikai sajátosságaira JF - GRADUS J2 - GRADUS VL - 8 PY - 2021 IS - 1 SP - 266 EP - 271 PG - 6 SN - 2064-8014 DO - 10.47833/2021.1.ENG.007 UR - https://m2.mtmt.hu/api/publication/32003411 ID - 32003411 N1 - K 132430 "Tranziens deformációs, termikus és tribológiai folyamatok kemény fémfelületek finomforgácsolásánál" ÚNKP-20-3 ÚNKP-20-2 LA - Hungarian 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 - Geier, Norbert AU - Takács, Márton AU - Davim, J. Paulo TI - A review on micro-milling: recent advances and future trends JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 112 PY - 2021 IS - 3-4 SP - 655 EP - 684 PG - 36 SN - 0268-3768 DO - 10.1007/s00170-020-06445-w UR - https://m2.mtmt.hu/api/publication/31793490 ID - 31793490 N1 - Department of Manufacturing Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary Department of Mechanical Engineering, University of Aveiro, Aveiro, Portugal Cited By :21 Export Date: 10 May 2022 CODEN: IJATE Correspondence Address: Balázs, B.Z.; Department of Manufacturing Science and Engineering, Hungary; email: balazs@manuf.bme.hu AB - Recently, mechanical micro-milling is one of the most promising micro-manufacturing processes for productive and accurate complex-feature generation in various materials including metals, ceramics, polymers and composites. The micro-milling technology is widely adapted already in many high-tech industrial sectors; however, its reliability and predictability require further developments. In this paper, micro-milling related recent results and developments are reviewed and discussed including micro-chip removal and micro-burr formation mechanisms, cutting forces, cutting temperature, vibrations, surface roughness, cutting fluids, workpiece materials, process monitoring, micro-tools and coatings, and process-modelling. Finally, possible future trends and research directions are highlighted in the micro-milling and micro-machining areas. LA - English DB - MTMT ER - TY - JOUR AU - Kundrák, János AU - Karpuschewski, B. AU - Pálmay, Zoltán AU - Felhő, Csaba AU - Makkai, Tamás AU - Borysenko, D. TI - The energetic characteristics of milling with changing cross-section in the definition of specific cutting force by FEM method JF - CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY J2 - CIRP J MANUF SCI TECHNOL VL - 32 PY - 2021 SP - 61 EP - 69 PG - 9 SN - 1755-5817 DO - 10.1016/j.cirpj.2020.11.006 UR - https://m2.mtmt.hu/api/publication/31821481 ID - 31821481 N1 - Funding text 1: We would like to thank the German Research Foundation (DFG) for its support of the collaboration between Otto von Guericke University Magdeburg (Germany) and the University of Miskolc (Hungary) within the project “Inverse cutting technology”. The authors greatly appreciate the support of the Hungarian National Research, Development and Innovation Office – NKFIH (No. of Agreement: OTKA K 116876 ). The described article was carried out as part of the EFOP-3.6.1-16-00011 “Younger and Renewing University – Innovative Knowledge City – institutional development of the University of Miskolc aiming at intelligent specialisation” project implemented in the framework of the Szechenyi 2020 program. The realization of this project is supported by the European Union, co-financed by the European Social Fund . AB - With cutting technology, including milling, new tasks must constantly be solved, for which the knowledge of the cutting force is necessary from the theoretical point of view and for the practical application of the technology. This article summarizes the results of a project to study the cutting force during milling. The technological analysis of milling was performed by FEM simulation, which was validated by measuring the cutting force. When milling, only one insert was placed in the cutter, the workpiece was C45 rolled steel, which was machined with different depths of cut ap and feed rates fz while the cross section Ac = ap · fz = 0.9 mm2 was kept constant. The calculations proved that the effect of the cross-section of the material deposited during milling, and thus the specific features of the technology, is well characterized by the chip ratio ap/fz. It has been shown that from the energy point of view it is expedient to avoid the chip ratio of ap/fz = 1 in the applied technology. It is preferable to set the value as far away as possible, preferably aiming to use ap/fz < 1. © 2020 CIRP LA - English DB - MTMT ER - TY - JOUR AU - Miller, Grael AU - Irani, Rishad A. AU - Ahmadi, Mojtaba TI - Application of mechanistic force models to features of arbitrary geometry at low material removal rate JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL PY - 2021 PG - 14 SN - 0268-3768 DO - 10.1007/s00170-021-07830-9 UR - https://m2.mtmt.hu/api/publication/32398916 ID - 32398916 AB - This paper presents a workpiece discretization method to apply existing cutting force models to predict the forces generated during low material removal rate robotic machining operations of features with arbitrary geometry. Two machining operations along a straight edge which are modelled using this feature discretization method are shown, a chamfer pass on a sharp corner and the removal of a trapezoidal cross section. The workpiece features are measured using a high-resolution laser profile scanner to obtain the volume of the features to be removed. The identified features are discretized into rectangular sections such that the cutting force models can be applied to predict the cutting forces. A linear and an exponential mechanistic model which relate tool immersion and feed rate to the cutting force are applied to the scanned workpiece features. The linear and nonlinear models show good agreement with the measured data, with the exception that the linear model occasionally over predicts the forces depending on the radial depth of cut. LA - English DB - MTMT ER - TY - JOUR AU - Ni, Jing AU - Tong, Kangcheng AU - Meng, Zhen AU - Feng, Kai TI - Force model for complex profile tool in broaching Inconel 718 JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL PY - 2021 PG - 13 SN - 0268-3768 DO - 10.1007/s00170-021-08329-z UR - https://m2.mtmt.hu/api/publication/32600851 ID - 32600851 N1 - Funding Agency and Grant Number: National Natural Science Foundation of China, ChinaNational Natural Science Foundation of China (NSFC) [51775153, 52005143]; Science Fund for Distinguished Young Scholars of Zhejiang Province, China [LR20E050002]; National Natural Science Foundation of Zhejiang Province, China [LQ21E050012] Funding text: This research was supported by the National Natural Science Foundation of China (Grant No. 51775153), China; National Natural Science Foundation of China (Grant No. 52005143), China; Science Fund for Distinguished Young Scholars of Zhejiang Province (LR20E050002), China; the National Natural Science Foundation of Zhejiang Province (Grant No. LQ21E050012), China. AB - Complex profile broaches are widely used in the manufacture of complex parts of aero-engines, but the forces in the broaching process are difficult to predict and control. A new numerical model for broaching force with complex profile tools was presented, which considered the area and arc length of the curved shear zone boundary. The area and arc length were calculated by the curve function of the boundary, which is firstly predicted by FEM simulation. Then, an experimental device was set up to carry out the broaching experiment with straight profile tools and complex profile tools in accordance with the progressive depth of the cut. Based on the experiments, the traditional broaching model and the modified model with the complex profile tool have been established. Compared with the traditional force model, the accuracy of the modified model has been moderately improved. Furthermore, the modified main broaching force (Y direction) model and the normal force (Z direction) model show a significant improvement in accuracy of 4.8% and 9.7%, respectively, which suggests that the projection area of curved shear zone A(1) and the projection arc length of curved shear zone l(1) have a big impact on the broaching process. It is firmly believed that the modified model proposed in this paper can provide guidance for the design of complex profile tools and facilitate the efficient and high-precision machining of complex parts. LA - English DB - MTMT ER - TY - JOUR AU - Pereszlai, Csongor AU - Geier, Norbert AU - Poór, Dániel István AU - Balázs, Barnabás Zoltán AU - Póka, György TI - Drilling fibre reinforced polymer composites (CFRP and GFRP): An analysis of the cutting force of the tilted helical milling process JF - COMPOSITE STRUCTURES J2 - COMPOS STRUCT VL - 262 PY - 2021 PG - 16 SN - 0263-8223 DO - 10.1016/j.compstruct.2021.113646 UR - https://m2.mtmt.hu/api/publication/31842848 ID - 31842848 N1 - Funding Agency and Grant Number: National Research, Development and Innovation Office (NKFIH)National Research, Development & Innovation Office (NRDIO) - Hungary [OTKA-PD20134430, UNKP-20-2-I-BME-268]; NRDI Fund (TKP2020 NC) under Ministry for Innovation and TechnologyNational Research, Development & Innovation Office (NRDIO) - Hungary [BME-NC]; project "Centre of Excellence in Production Informatics and Control" (EPIC) [EU H2020-WIDE SPREAD-01-2016-2017-TeamingPhase2-739592] Funding text: This research was partly supported by the National Research, Development and Innovation Office (NKFIH) No. OTKA-PD20134430 and UNKP-20-2-I-BME-268. The research reported in this paper and carried out at BME 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 and by the project "Centre of Excellence in Production Informatics and Control" (EPIC) No. EU H2020-WIDE SPREAD-01-2016-2017-TeamingPhase2-739592. Furthermore, the authors acknowledge the BME Department of Polymer Engineering and Balint Laczik for their participation in the experimental work. AB - Hole making is one of the most common machining operations in fibrous composites. Holes can be produced using conventional machining technologies. However, in these cases, the size of delamination and burr appearance are often significant mostly due to the relatively large axial cutting forces. The main purpose of this research paper is to optimise and compare tilted helical milling processes in the case of carbon and glass fibre reinforced polymer (CFRP and GFRP) composites. In the scope of this research paper, numerous tilted helical milling experiments were carried out on CFRP and GFRP composites using an uncoated carbide end mill. The influences of the tilting angle and the pitch of the helical tool path on the axial cutting force were analysed and discussed based on experimental results and analytical models. In addition, machining-induced burr and microstructure were analysed using optical-digital and scanning electron microscopy, respectively. Experimental results show that both cutting force and burr are significantly influenced by pitch and tilting angle. Furthermore, the maximisation of the tilting angle is recommended in any of the cases examined in the scope of our study. LA - English DB - MTMT ER - TY - JOUR AU - Balázs, Barnabás Zoltán AU - Takács, Márton TI - Experimental investigation of surface characteristics and dynamic effects at micro milling of hardened hot-work tool steel JF - INTERNATIONAL JOURNAL OF MACHINING AND MACHINABILITY OF MATERIALS (IJMMM) J2 - INT J MACHINING MACHINABILITY MATER VL - 22 PY - 2020 IS - 6 SP - 504 EP - 526 PG - 23 SN - 1748-5711 DO - 10.1504/IJMMM.2020.111355 UR - https://m2.mtmt.hu/api/publication/31672119 ID - 31672119 LA - English DB - MTMT ER - TY - JOUR AU - Balázs, Barnabás Zoltán AU - Jacsó, Ádám AU - Takács, Márton TI - Micromachining of hardened hot-work tool steel: effects of milling strategies JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 108 PY - 2020 SP - 2839 EP - 2854 PG - 16 SN - 0268-3768 DO - 10.1007/s00170-020-05561-x UR - https://m2.mtmt.hu/api/publication/31345416 ID - 31345416 N1 - Cited By :3 Export Date: 10 May 2022 CODEN: IJATE Correspondence Address: Balázs, B.Z.; Faculty of Mechanical Engineering, Hungary; email: balazs@manuf.bme.hu LA - English 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 - 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 - JOUR AU - Geier, Norbert TI - Influence of fibre orientation on cutting force in up and down milling of UD-CFRP composites JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 111 PY - 2020 SP - 881 EP - 893 PG - 13 SN - 0268-3768 DO - 10.1007/s00170-020-06163-3 UR - https://m2.mtmt.hu/api/publication/31625427 ID - 31625427 N1 - Funding Agency and Grant Number: Budapest University of Technology and Economics; National Research, Development and Innovation Office (NKFIH) [OTKA-PD20-134430]; project "Centre of Excellence in Production Informatics and Control" (EPIC) [EU H2020-WIDESPREAD-01-2016-2017-TeamingPhase2-739592]; Portugal-Hungarian bilateral scientific cooperation Project [2018-2.1.15-TET-PT-2018-00012]; BME NC TKP2020 grant of NKFIH Hungary Funding text: Open access funding provided by Budapest University of Technology and Economics. This research was partly supported by the National Research, Development and Innovation Office (NKFIH) No. OTKA-PD20-134430 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 Portugal-Hungarian bilateral scientific cooperation Project No. 2018-2.1.15-TET-PT-2018-00012 and by the BME NC TKP2020 grant of NKFIH Hungary. Funding Agency and Grant Number: Budapest University of Technology and Economics; National Research, Development and Innovation Office (NKFIH)National Research, Development & Innovation Office (NRDIO) - Hungary [OTKA-PD20-134430]; project "Centre of Excellence in Production Informatics and Control" (EPIC) [EU H2020-WIDESPREAD-01-2016-2017-TeamingPhase2-739592]; Portugal-Hungarian bilateral scientific cooperation Project [2018-2.1.15-TET-PT-2018-00012]; BME NC TKP2020 grant of NKFIH HungaryNational Research, Development & Innovation Office (NRDIO) - Hungary Funding text: Open access funding provided by Budapest University of Technology and Economics. This research was partly supported by the National Research, Development and Innovation Office (NKFIH) No. OTKA-PD20-134430 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 Portugal-Hungarian bilateral scientific cooperation Project No. 2018-2.1.15-TET-PT-2018-00012 and by the BME NC TKP2020 grant of NKFIH Hungary. LA - English DB - MTMT ER - TY - JOUR AU - Póka, György AU - Németh, István TI - The effect of radial rake angle on chip thickness in the case of face milling JF - PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE J2 - P I MECH ENG B-J ENG VL - 234 PY - 2020 IS - 1-2 SP - 40 EP - 51 PG - 12 SN - 0954-4054 DO - 10.1177/0954405419849245 UR - https://m2.mtmt.hu/api/publication/30685894 ID - 30685894 AB - The existing models of undeformed chip thickness for face milling found in the literature neglect the radial rake angle of the tool, and they assume that its value is zero. The effect of the variation of the radial rake angle has not yet been discussed in the literature. As a novelty, this article investigates such an effect, especially the effect on chip thickness. A new tool model is proposed that takes into account the radial rake angle. A new method to calculate the chip thickness has been developed that uses the new tool model and is based on several existing numerical and approximation methods. It is analytically proved that the effect of the radial rake angle must be taken into account for calculating accurate results; however, in the case of lower feed rates, that effect is insignificant. The presented procedures are evaluated with respect to their accuracy and computing requirements. The proposed new methods have been verified by cutting experiments. LA - English DB - MTMT ER - TY - JOUR AU - Sanz, Markel AU - Iglesias, Alex AU - Munoa, Jokin AU - Dombóvári, Zoltán TI - The Effect of Geometry on Harmonically Varied Helix Milling Tools JF - JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME J2 - J MANUF SCI E-T ASME VL - 142 PY - 2020 IS - 7 PG - 6 SN - 1087-1357 DO - 10.1115/1.4046901 UR - https://m2.mtmt.hu/api/publication/31440685 ID - 31440685 N1 - Funding Agency and Grant Number: Hungarian National Research, Development and Innovation Office [NKFI FK 124361]; TiMachina project from the International Technological Corporation [IDI-201904196]; R+d projects program of the Spanish Centre for the Development of Industrial Technology (CDTI) Funding text: This work has been partially supported by the Hungarian National Research, Development and Innovation Office (NKFI FK 124361), by TiMachina project (IDI-201904196) from the International Technological Corporation, and by R+d projects program of the Spanish Centre for the Development of Industrial Technology (CDTI). AB - Two different kinds of descriptions for edge geometry of harmonically varied helix tools are studied in this work. The edge geometries of the so-called lag and helix variations are used in this paper, and their equivalency is established from engineering point of view. The equivalent relation is derived analytically and the nonlinear algebraic system is described, with which the numerical equivalency properties can be determined. The equivalent description can be utilized in variable helix tool production to determine an optimized set of geometrical parameters of the edge geometry. The stability properties are shown and compared for a simple one degree-of-freedom case with the nonuniform constant helix tools. The robustness of the results related to the harmonically varied tools is critically discussed in this paper showing advantages compared to the nonuniform constant helix case. The results suggest that the more extreme the edge variation is, the more stable the process performed with the corresponding harmonically varied tool becomes. LA - English DB - MTMT ER - TY - JOUR AU - Dombóvári, Zoltán AU - Iglesias, Alex AU - Molnár, Tamás Gábor AU - Habib, Giuseppe AU - Munoa, Jokin AU - Kuske, Rachel AU - Stépán, Gábor TI - Experimental Observations on Unsafe Zones in Milling Processes JF - PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A - MATHEMATICAL PHYSICAL & ENGINEERING SCIENCES J2 - PHILOS TRANS - R SOC A VL - 377 PY - 2019 IS - 2153 SP - 1 EP - 18 PG - 19 SN - 1364-503X DO - 10.1098/rsta.2018.0125 UR - https://m2.mtmt.hu/api/publication/30460044 ID - 30460044 LA - English DB - MTMT ER - 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 - JOUR AU - Jacsó, Ádám AU - Matyasi, Gyula AU - Szalay, Tibor TI - The fast constant engagement offsetting method for generating milling tool paths JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 103 PY - 2019 SP - 4293 EP - 4305 PG - 13 SN - 0268-3768 DO - 10.1007/s00170-019-03834-8 UR - https://m2.mtmt.hu/api/publication/30685935 ID - 30685935 LA - English DB - MTMT ER - TY - JOUR AU - Zhang, B. AU - Zhao, C.-Y. AU - Wen, B.-C. TI - Dynamic Cutting Force Measurement Test and Prediction of Time Series Model for Machine Tools JF - DONGBEI DAXUE XUEBAO/JOURNAL OF NORTHEASTERN UNIVERSITY NATURAL SCIENCE J2 - J OF NORTHEAST UNIV NAT SCI VL - 40 PY - 2019 IS - 4 SP - 521 EP - 525 and 530 SN - 1005-3026 DO - 10.12068/j.issn.1005-3026.2019.04.013 UR - https://m2.mtmt.hu/api/publication/32600986 ID - 32600986 N1 - Cited By :1 Export Date: 18 January 2022 CODEN: DDXKE Correspondence Address: Zhao, C.-Y.; School of Mechanical Engineering & Automation, China; email: chyzhao@mail.neu.edu.cn AB - In order to obtain the dynamic cutting force, the experiment of 12Cr18Ni9 revolving parts was carried out on the NC machine tool ETC1625P. The location information of the cutter in the two orthogonal directions of the cutting plane was obtained by the real-time signal acquisition system. Meanwhile, the KISTLER sensor was installed on the tool head of the machine tool to measure the real-time cutting forces in three cutting directions. The experimental data shows that volatility change of the cutting force was produced in the feed direction with the displacement. In order to study the complex nonlinear relationship between the cutting force and cutting parameters, the prediction of dynamic cutting force is realized by time series analysis modeling. The cutting force error is analyzed, and the prediction accuracy obtained meets the requirements. © 2019, Editorial Department of Journal of Northeastern University. All right reserved. LA - Chinese DB - MTMT ER - TY - CONF AU - Biró, István AU - Szalay, Tibor AU - Geier, Norbert ED - Monostori, László ED - Stépán, Gábor ED - Bachrathy, Dániel TI - Effect of cutting parameters on section-borders of the empirical specific cutting force model for cutting with micro-sized uncut chip thickness T2 - 8th CIRP Conference on High Performance Cutting PB - College International pour la Recherche en Productique, CIRP C1 - Budapest T3 - Procedia CIRP, ISSN 2212-8271 ; 77. PY - 2018 PG - 4 DO - 10.1016/j.procir.2018.09.015 UR - https://m2.mtmt.hu/api/publication/3421809 ID - 3421809 N1 - MTA SZTAKI Conference code: 141997 Cited By :12 Export Date: 18 January 2022 Correspondence Address: Biró, I.; Budapest Univerity of Technology and Economics, Műegyetem rkp. 3, Hungary; email: biro@manuf.bme.hu Funding details: Horizon 2020 Framework Programme, H2020, 739592 Funding text 1: The authors would like to acknowledge the support provided by the CEEPUS III HR 0108 project. This research was partly supported by the EU H2020-WIDESPREAD-01-2016-2017-TeamingPhase2-739592 project “Centre of celleExnce in Production Inorf aticm s and Control” (EPI).C AB - Miniaturization is a general trend in part manufacturing: the size of the components and the rate of corresponding tolerance shrink. This fact makes the appliance of precision- and micromachining operations required. Mechanical cutting has been successfully adapted to perform precision machining and microcutting with uncut chip thickness typically under 0.01 mm. Size effect is dominant in this scale: the amount of specific cutting energy greatly increases according the type of material deformation occurring at the cutting edge radius. The multi-sectioned empirical model of specific cutting force proved to be an effective model to indicate such transient mechanisms. Aim of current research is to describe the effect of cutting parameters on the known section borders (called boundary chip thicknesses) in the model of specific cutting force. As a result, the newly created empirical models involve feed rate and cutting speed as direct input parameters, and assumption has been made to explain the physical meaning behind boundary chip thicknesses from the aspect of material deformation. LA - English DB - MTMT ER - TY - JOUR AU - GONZALEZ ROJAS, HERNAN A. AU - SANCHEZ EGEA, ANTONIO J. AU - NAPOLES ALBERRO, AMELIA TI - ESTIMACIÓN DE LA MAQUINABILIDAD MEDIANTE MONITORIZACIÓN DEL TALADRADO JF - DYNA-BILBAO J2 - DYNA-BILBAO VL - 93 PY - 2018 IS - 6 SP - 663 EP - 667 PG - 5 SN - 0012-7361 DO - 10.6036/8821 UR - https://m2.mtmt.hu/api/publication/30320716 ID - 30320716 LA - English DB - MTMT ER - TY - JOUR AU - Zhang, Xiangyu AU - Sui, He AU - Zhang, Deyuan AU - Jiang, Xinggang TI - An analytical transient cutting force model of high-speed ultrasonic vibration cutting JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 95 PY - 2018 IS - 9-12 SP - 3929 EP - 3941 PG - 13 SN - 0268-3768 DO - 10.1007/s00170-017-1499-z UR - https://m2.mtmt.hu/api/publication/27030507 ID - 27030507 LA - English DB - MTMT ER - TY - JOUR AU - Zhou, Lan AU - Dong, Huiyue AU - Ke, Yinglin AU - Chen, Guanglin TI - Modeling of non-linear cutting forces for dry orbital drilling process based on undeformed chip geometry JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 94 PY - 2018 IS - 1-4 SP - 203 EP - 216 PG - 14 SN - 0268-3768 DO - 10.1007/s00170-017-0740-0 UR - https://m2.mtmt.hu/api/publication/27036480 ID - 27036480 LA - English DB - MTMT ER - TY - JOUR AU - Horváth, Richárd AU - Lukács, Judit TI - Application of a Force Model Adapted for the Precise Turning of Various Metallic Materials JF - STROJNISKI VESTNIK-JOURNAL OF MECHANICAL ENGINEERING J2 - STROJ VESTN-J MECH E VL - 63 PY - 2017 IS - 9 SP - 489 EP - 500 PG - 12 SN - 0039-2480 DO - 10.5545/sv-jme.2017.4430 UR - https://m2.mtmt.hu/api/publication/3266504 ID - 3266504 N1 - Funding Agency and Grant Number: Ministry of Human Capacities, Hungary [UNKP-16-4/I] Funding text: Supported by the UNKP-16-4/I. New National Excellence Program of the Ministry of Human Capacities, Hungary. LA - English DB - MTMT ER -