Yazar "Khan, Aqib Mashood" seçeneğine göre listele

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    A review on conventional and advanced minimum quantity lubrication approaches on performance measures of grinding process
    (Springer London Ltd, 2021) Gupta, Munish Kumar; Khan, Aqib Mashood; Song, Qinghua; Liu, Zhanqiang; Khalid, Qazi Salman; Jamil, Muhammad; Kuntoglu, Mustafa
    Grinding is one of the important machining processes that are widely applied in precision manufacturing. In the beginning, studies mostly focused on dry machining. In time, emerging technologies have led to change in the development of the machining process. New techniques and tools have been developed over the last decade that has brought the process to an advanced place. At first, flood cooling has removed the burning problems in the grinding process. After that, a new technique was developed which is known as minimum quantity lubrication (MQL). This technique is a recognized opportunity to eliminate environmental concerns. This paper reviews some of the common as well as advanced MQL systems specifically used in grinding operations. The effect of MQL and other cutting parameters on cutting forces, surface roughness of the machined workpiece, tool wear, temperature, specific cutting energy, and residual stress is outlined. This paper also addressees the recent trend of cooling systems in the grinding process. After reading this research paper, one can easily get an overview of the previously conducted research to find the output parameter trends in MQL condition. The reader can infer from this paper in which direction the development trend in grinding is in the machining process.
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    Heat Transfer Efficiency of Cryogenic-LN2 and CO2-snow and their application in the Turning of Ti-6AL-4V
    (Pergamon-Elsevier Science Ltd, 2021) Jamil, Muhammad; He, Ning; Zhao, Wei; Li, Liang; Gupta, Munish Kumar; Sarikaya, Murat; Khan, Aqib Mashood
    Owing to poor thermal conductivity, and high chemical reactivity of Ti-6Al-4V alloy at elevated temperatures, a lubri-cooling having superior heat transfer is benefic to apply to dissipate cutting heat and to improve the machinability. As conventional coolants are ineffective to prevent thermal damage and tool wear. Therefore, recent advanced cryogenic coolants such as cryogenic-liquid nitrogen (LN2) and carbon dioxide (CO2-snow) are hypothesized to mitigate the set objectives. In this experimental study, a static workpiece plate was sprayed to compare their heat transfer coefficients. Furthermore, the machining performance of cryogenic coolants was evaluated in the turning of Ti-6Al-4V in terms of tool wear, cutting force, surface roughness, and chip curl diameter. For this, experiments are conducted at a constant cutting speed of 120 m/min, a feed rate of 0.1 mm/rev, the coolant injection flow rate of 350, 450g/min, and a depth of cut of 2.5 mm to clarify their effect on the process. The outcome analysis of this work showed the overall less tool wear, cutting forces, surface roughness, with maximum chip curl diameter under CO2-snow cooling followed by cryogenic-LN2 and dry condition. In summary, CO2-snow showed promising outcomes and a superior heat transfer effect warrant its implementation in the aerospace industry. (C) 2020 Elsevier Ltd. All rights reserved.
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    Progress for sustainability in the mist assisted cooling techniques: a critical review
    (Springer London Ltd, 2020) Singh, Gurraj; Gupta, Munish Kumar; Hegab, Hussein; Khan, Aqib Mashood; Song, Qinghua; Liu, Zhanqiang; Mia, Mozammel
    The proper implementation of sustainable manufacturing processes is an effective step towards a clean environment. The modern cooling strategies applied in the manufacturing sector have presented promising solutions that enable economic growth and ecological environment. In machining operations, cryogenic cooling and minimum quantity lubrication (MQL) have been extensively utilized to replace conventional cooling techniques. Thus, this work offers a detailed review of major works focused on manufacturing processes that use some of these sustainable cooling/lubrication modes (i.e., MQL, nanocutting fluids, nanofluid-based MQL strategy, and other miscellaneous MQL upgrades). The main driver of this study is to create a bridge between the past and present studies related to MQL and MQL upgrades. In this way, a new guideline can be established to offer clear directions for a better economic vision and a cleaner manufacturing process. Thus, this review has mainly focused on the machining of the most commonly used materials under MQL-related methods in conventional operations including turning, milling, drilling, and grinding. Current work provides a detailed insight into the major benefits, limitations, as well as mechanisms of cooling strategies that directly affects the machinability performance from a sustainable point of view. In summary, further potential upgrades are indicated so that it will help to drive more sustainable approaches in terms of cooling and lubrication environment during machining processes.
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    Sustainable milling of Ti-6Al-4V: A trade-off between energy efficiency, carbon emissions and machining characteristics under MQL and cryogenic environment
    (Elsevier Sci Ltd, 2021) Jamil, Muhammad; Zhao, Wei; He, Ning; Gupta, Munish Kumar; Sarikaya, Murat; Khan, Aqib Mashood; Sanjay, M. R.
    The urgent need for an innocuous and sustainable machining system is essential in this modern manufacturing era. Therefore, a study is devoted to fulfilling a missing bridge between sustainability measures (process time, specific cutting energy, energy efficiency, carbon emissions) and machining characteristics (tool wear, surface roughness, cutting temperature) in the milling of Ti-6Al-4V. The experiments are organized by implementing the minimum quantity lubrication (MQL), CO2-snow, and cryogenic-LN2 under varying end-mill geometries and cutting conditions. The results obtained have underscored the outperformed CO2-snow followed by cryogenic-LN2, MQL, and dry cutting conditions regarding sustainability measures and machining characteristics. The up-milling of 42 degrees helix angle cutter and CO2-snow outperformed by reducing 47% of surface roughness, 50% extended tool life compared to dry cutting. The cryogenic-LN2 provided minimum cutting temperature flowed by CO2-snow, MQL, and dry cutting, respectively. Besides, the up-milling tool of the 42 degrees helix angle provided better machining characteristics than the down-milling tool of the 30 degrees helix angle. The feasibility of CO2-snow was comprehensively expressed and implemented in the milling process to extend the advanced analysis. (C) 2020 Elsevier Ltd. All rights reserved.