Yazar "Singla, Anil Kumar" seçeneğine göre listele

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    Environment and economic burden of sustainable cooling/lubrication methods in machining of Inconel-800
    (Elsevier Sci Ltd, 2021) Gupta, Munish Kumar; Song, Qinghua; Liu, Zhanqiang; Sarikaya, Murat; Jamil, Muhammad; Mia, Mozammel; Singla, Anil Kumar
    The present work deals with the machining application of one of the aerospace material i.e., Inconel-800 alloy by considering the social, economic and environmental effects. The turning tests were done under four sustainable machining conditions i.e., dry, vegetable oil with minimum quantity lubrication (MQL) system, graphene nanofluid plus vegetable oil with MQL (NMQL) system and liquid nitrogen (N-2) cooling. Then, the energy consumption, carbon emissions, cost per part, average surface roughness and cutting tool wear have been measured for varied cutting speed and feed rate under selected sustainable environments. The outcomes of this study revealed that the N-2 cooling conditions reduced the total machining cost up to 9.3%, total energy consumption up to11.3%, carbon emissions up to 49.17% and tool wear up to 46.6% as compared to other cooling conditions. Significant improvement in surface roughness and tool wear have also been noticed from the outcomes of N-2 cooling conditions. Hence, it is worthy to mention that these cooling conditions promote sustainability in the aerospace sector by saving resources and extending environmental benefits. (C) 2020 Elsevier Ltd. All rights reserved.
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    Machinability investigations of hardened steel with biodegradable oil-based MQL spray system
    (Springer London Ltd, 2020) Gupta, Munish Kumar; Mia, Mozammel; Jamil, Muhammad; Singh, Rupinder; Singla, Anil Kumar; Song, Qinghua; Liu, Zhanqiang
    Excessive use of coolant is undesirable in machining due to environmental consciousness; thereby, small but efficacious (improved thermal and tribological properties) amount of coolant has been implemented using minimum quantity lubrication (MQL). In this study, attention was focused on the experimental investigations on tool flank wear, chip morphology, surface roughness (R-a and R-q) and chip-tool interface temperature in the machining of hardened steel (similar to 40 HRC) under olive oil-assisted MQL spray system. As investigating factors, the cutting speed, feed rate, and depth of cut were oriented by following the Taguchi orthogonal array. Then, the cooling and lubrication mechanism of the olive oil-assisted MQL system has been discussed. Outcomes of this study showed that MQL is capable of generating favorable machining outcomes, i.e., lower tool flank wear, reduced temperature, and surface roughness in comparison with dry cutting. The reductions in R-a, R-q, and cutting temperature were about 23.4%, 23.8%, and 24% respectively in terms of mean values. The two types of dominant chip shapes, i.e., (1) continuous tubular and (2) discontinuous small diameter chips, were produced under the dry and MQL-assisted cooling method. In the nutshell, it is appropriate to claim that the overall thermal and tribological properties of olive oil-assisted MQL system are responsible for fruitful results during turning of hardened steel.
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    Review on design and development of cryogenic machining setups for heat resistant alloys and composites
    (Elsevier Sci Ltd, 2021) Khanna, Navneet; Agrawal, Chetan; Pimenov, Danil Yu; Singla, Anil Kumar; Machado, Alisson Rocha; da Silva, Leonardo Rosa Ribeiro; Gupta, Munish Kumar
    Cryogenic machining is becoming a sustainable choice due to its extraordinary performance (such as non-toxic and environmentally friendly) superiority to other traditional coolants and lubricants to produce products with superior quality. This paper also critically reviews improvements in designing the cryogenic delivery setup used by researchers for machining low machinability materials like titanium alloys, nickel alloys, ferrous alloys, composites, and other difficult-to-cut materials. It also briefs the economic and sustainable perspective of this state-of-art technology. The aim is to maximize the usage of sustainable cryogenic and hybrid machining technologies in the global manufacturing industry by highlighting their advantages. An overview of in-house developed cryogenic and hybrid machining techniques is presented. Various challenges and future needs related to cryogenic and hybrid-machining techniques are also discussed in the articles. Although remarkable results are obtained with the available literature's delivery methods, there is still no consensus regarding the best cryogenic delivery methods for machining the aforementioned materials. In addition, further hybridization of cryogenic delivery techniques with near dry machining techniques such as minimum quantity lubrication (MQL), electrostatic-MQL (EMQL), and nanofluid based MQL (nMQL) can be beneficial for machinability improvements of difficult-to-machine materials.
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    Tribological performance based machinability investigations in cryogenic cooling assisted turning of α-β titanium Alloy
    (Elsevier Sci Ltd, 2021) Gupta, Munish Kumar; Song, Qinghua; Liu, Zhanqiang; Sarikaya, Murat; Mia, Mozammel; Jamil, Muhammad; Singla, Anil Kumar
    Machining of titanium is considered as a challenging process due to its ability to interact with various tool materials when critical cutting temperature is exceeded, resulting in excessive tool wear and poor surface finish, etc. To exhibit an efficient machining process, this research study has experimentally investigated the key quality indicators of machinability, namely surface roughness, cutting temperature, tool wear, in-depth analysis of worn tool and cutting force in the machining process of alpha-beta titanium alloy, which used in critical applications, under three sustainable cooling environments i.e., dry, liquid nitrogen (LN2) and carbon dioxide (CO2). The effect of cutting speed and feed rate on such performance measures were examined under a function of cooling strategy as the best substitute in machining. As a result, the feasibility of LN2 cooling has been confirmed to be more significant for the machining of alpha-beta titanium alloy when compared to dry and CO2 machining strategies. To sum up, cryogenic cooling (LN2 cooling) assisted machining of alpha-beta titanium has acquiesced as a sustainable strategy in the context of environmental consciousness.