Hybrid journal (It can contain Open Access articles) ISSN (Print) 1746-9392 - ISSN (Online) 1746-9406 Published by Inderscience Publishers[451 journals]
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Authors:Xiaohong Lu, Yihan Luan, Kun Yang, Feixiang Ruan, Pengrong Hou, Ning Zhao Pages: 77 - 91 Abstract: Tool wear makes it difficult to obtain high-quality tiny thin wall parts during micro-milling Inconel 718 process. In this paper, tool wear mechanism of coated cemented carbide micro-milling tool is studied based on Inconel 718 thin wall micro-milling experiments. The wear, damage morphology and failure mechanism of the rake face of the circumferential edge and the flank face of the circumferential edge of the micro-milling tool are studied. It is found that the main failure mode of micro-milling tool is the damage of micro-milling tool circumferential edge and coating shedding; the main cause of tool wear is the combination of adhesive wear, diffusion wear and oxidation wear during micro-milling Inconel 718 thin wall parts,. The research provides reference for reducing the tool wear, extending the service life of cutter, and achieving high-quality thin wall parts during micro-milling Inconel 718 process. Keywords: micro-milling; tool wear; Inconel 718; thin wall Citation: International Journal of Nanomanufacturing, Vol. 17, No. 2 (2021) pp. 77 - 91 PubDate: 2022-04-07T23:20:50-05:00 DOI: 10.1504/IJNM.2021.121810 Issue No:Vol. 17, No. 2 (2022)
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Authors:Haruki Kino, Takumi Imada, Keiji Ogawa, Heisaburo Nakagawa, Hitomi Kojima Pages: 92 - 104 Abstract: The need for micro-end-milling technology is increasing in recent years. However, it seems to be difficult to achieve high-precision and high-efficiency in micro-end-milling. The reason for this is that small-diameter endmills have small rigidity and are easily deformed during machining, and therefore the depth of cut has to be set small. Hence, the authors have analysed the processing phenomenon in detail. In the present paper, the cutting force, surface roughness, machining accuracy, and changes in tool wear were investigated in detail when hardened die steel was side-cut at high-speed. As a result, it was clarified that high-speed cutting can suppress the dimensional accuracy and shape error, and that high-efficiency machining can be achieved. It is not easy to perform theoretical analysis and numerical simulation in the machining analysis of micro end mills. In this study, experimental machining was first carried out, and sufficient useful knowledge was obtained. Keywords: end mill; micro-end-milling; high-speed cutting; side cutting; hardened die steel; surface roughness; tool wear; cutting force; accuracy; tool life Citation: International Journal of Nanomanufacturing, Vol. 17, No. 2 (2021) pp. 92 - 104 PubDate: 2022-04-07T23:20:50-05:00 DOI: 10.1504/IJNM.2021.121882 Issue No:Vol. 17, No. 2 (2022)
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Authors:Yoshiyuki Seike, Daiki Tangiku, Tatsuo Mori Pages: 105 - 118 Abstract: This study describes the relationship between the surface states of active layers and organic thin-film photovoltaic (OPV) cell properties when the active layer of an OPV cell is deposited through electrospray (ES). The mixture of poly(3-hexylthiophene-2,5-diyl) (P3HT) and [6,6]-Phenyl C<SUB align="right">61 butyric acid methyl ester (PC<SUB align="right">61BM) was deposited via ES. Power conversion efficiency (PCE) decreased from 1.38% to 0.32% when the substrate temperature increased from 25°C to 40°C. The surface state of the active layer was investigated using an atomic force microscope (AFM) to explore the cause of PCE decline. As a result, the active layer deposited via ES produced coffee ring-shaped grains with a size of tens of micrometers. The decrease in PCE was caused by a decrease in the grain size when the substrate temperature was increased, and the interface between the grains widened, impeding carrier transport. Keywords: organic thin-film photovoltaic; electrospray; active layer; deposition; substrate temperatures Citation: International Journal of Nanomanufacturing, Vol. 17, No. 2 (2021) pp. 105 - 118 PubDate: 2022-04-07T23:20:50-05:00 DOI: 10.1504/IJNM.2021.121887 Issue No:Vol. 17, No. 2 (2022)
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Authors:Anup A. Junankar, Jayant K. Purohit, Nikhil V. Bhende Pages: 119 - 138 Abstract: Metal cutting industries are marching towards sustainable ecofriendly manufacturing processes. Nanofluid along with minimum quantity lubrication is the vital combination for sustainable manufacturing. The important objective of this experimental investigation was to evaluate the effect of synthesised monotype (Al<SUB align="right">2O<SUB align="right">3 and CuO) and hybrid (Al<SUB align="right">2O<SUB align="right">3/CuO) nanofluid along with minimum quantity lubrication on bearing steel turning by varying the cooling conditions. The response variables surface roughness and cutting zone temperature were selected. For multi-objective optimisation, grey relational analysis technique was utilised to find the optimum condition. Hybrid nanofluid (Al<SUB align="right">2O<SUB align="right">3/CuO) with minimum quantity lubrication (MQL) cooling condition shown the effective results. The utilisation of Al<SUB align="right">2O<SUB align="right">3/CuO hybrid nanofluid shown significant minimisation of surface roughness by 66% and 67% compare to CuO nanofluid and Al2O3 nanofluid respectively. Also, effective decrement in cutting zone temperature observed under Al<SUB align="right">2O<SUB align="right">3/CuO hybrid nanofluid cooling condition by 11% and 10.5% compare to CuO nanofluid and Al<SUB align="right">2O<SUB align="right">3 nanofluid respectively. Keywords: hybrid nanofluid; minimum quantity optimisation; optimisation; grey relational analysis; surface roughness; cutting zone temperature Citation: International Journal of Nanomanufacturing, Vol. 17, No. 2 (2021) pp. 119 - 138 PubDate: 2022-04-07T23:20:50-05:00 DOI: 10.1504/IJNM.2021.121945 Issue No:Vol. 17, No. 2 (2022)
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Authors:Xiaohong Lu, Xvdong Sun, Pengrong Hou, Liang Xue, Steven Y. Liang Pages: 139 - 153 Abstract: To meet the requirements for assembly accuracy, service life and electric conductivity, the industry usually pursues low surface roughness of single-crystal copper micro-components. The processing and manufacturing of low-surface-roughness single crystal copper micro-components pose new challenges to the process. Micro-milling is an efficient technical way of processing small components with complex three-dimensional topography and low surface roughness. However, the surface forming mechanism of micro-milled single crystal copper is not clear. Based on the theory of trochoidal trajectory of micro-milling cutter, considering the influence of cutter geometry vibration, minimum cutting thickness and other factors. It analysed the formation mechanism of surface topography of single crystal copper micro-milling, and established a surface topography simulation model. The prediction of surface roughness was realised, and conducted a single crystal copper groove milling experiment to prove the effectiveness of the model and prediction. Keywords: micro-milling; single crystal copper; surface topography; surface roughness; simulation; prediction; cutting trajectory Citation: International Journal of Nanomanufacturing, Vol. 17, No. 2 (2021) pp. 139 - 153 PubDate: 2022-04-07T23:20:50-05:00 DOI: 10.1504/IJNM.2021.121953 Issue No:Vol. 17, No. 2 (2022)
Hybrid journal (It can contain Open Access articles)
[451 journals]
