Yazar "Pimenov, Danil Yu" seçeneğine göre listele

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    A state-of-the-art review on sensors and signal processing systems in mechanical machining processes
    (Springer London Ltd, 2021) Kuntoglu, Mustafa; Salur, Emin; Gupta, Munish Kumar; Sarikaya, Murat; Pimenov, Danil Yu
    Sensors are the main equipment of the data-based enterprises for diagnosis of the health of system. Offering time- or frequency-dependent systemic information provides prognosis with the help of early-warning system using intelligent signal processing systems. Therefore, a chain of data-based information improves the efficiency especially focusing on the determination of remaining useful life of a machine or tool. A broad utilization of sensors in machining processes and artificial intelligence-supported data analysis and signal processing systems are prominent technological tools in the way of Industry 4.0. Therefore, this paper outlines the state of the art of the mentioned systems encountered in the open literature. As a result, existing studies using sensor systems including signal processing facilities in machining processes provide important contribution for error minimization and productivity maximization. However, there is a need for improved adaptive control systems for faster convergence and physical intervention in case of possible problems and failures. On the other hand, sensor fusion is an innovative new technology that makes decisions using multi-sensor information to determine tool status and predict system stability. It is currently not a fully accepted and practiced method. In a nutshell, despite their numerous advantages in terms of efficiency, time saving, and cost, the current situation of sensors used in the industry is not a sufficient level due to the investment cost and its increase with additional signal acquisition hardware and software equipment. Therefore, more studies that can contribute to the literature are needed.
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    A state-of-the-art review on tool wear and surface integrity characteristics in machining of superalloys
    (Elsevier, 2021) Sarikaya, Murat; Gupta, Munish Kumar; Tomaz, Italo; Pimenov, Danil Yu; Kuntoglu, Mustafa; Khanna, Navneet; Yildirim, Cagri Vakkas
    Today, superalloys (also known as hard-to-cut materials) such as nickel, titanium and cobalt based cover a wide range of areas in engineering applications. At the same time, challenging material properties namely high strength and low thermal conductivity cause low quality in terms of cutting tool life and surface integrity of the machined part. It is important to improve the machinability of this type of materials by applying various methods in the perspective of sustainability. Therefore, current study presents surface integrity, tool wear characteristics and initiatives to improve them during the machining of superalloys. In this manner, it is outlined the surface integrity characteristics containing surface defects, surface roughness, microstructure alterations and mechanical properties. Also, tool wear mechanisms for example abrasive, adhesive, oxidation, diffusion and plastic deformation are investigated in the light of literature review. Finally, possible improvement options for tool wear and surface integrity depend on machining parameters, tool modifications, cooling methods and trade-off strategies are highlighted. The paper can be a guide for the researchers and manufacturers in the area of sustainable machining of hard-to-cut materials as explaining the latest trends and requirements. (C) 2021 CIRP.
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    Experimental investigation on the effect of dry and multi-jet cryogenic cooling on the machinability and hole accuracy of CFRP composites
    (Elsevier, 2022) Agrawal, Chetan; Khanna, Navneet; Pimenov, Danil Yu; Wojciechowski, Szymon; Giasin, Khaled; Sarikaya, Murat; Yildirim, Cagri Vakkas
    In this work, the drilling performance of carbon fibre reinforced plastic (CFRP) composites is analysed in terms of thrust force (F-n), torque (M-z), specific cutting energy (SCE), delamination factor (F-d), and hole quality under dry and cryogenic cooling conditions. An in-house developed multi-jet liquid nitrogen (LN2) delivery setup is used for experimental trials. This LN2 delivery system is retrofitted to an existing machine tool to enable the movement of jets along the axis of the spindle for better reachability of LN2 to the cutting zone during the drilling operation. Experiments are conducted using the full factorial technique considering four levels of spindle rotational speed (N), four levels of feed rate (f(r)), and two cutting conditions i.e., dry and cryogenic cooling. Results show increased F-n up to 35% and decreased M-z up to 24.46% using cryogenic drilling as compared to dry drilling. Moreover, SCE is reduced up to 35% using cryogenic drilling than in dry drilling. Entry F-d is decreased up to 21.55% under cryogenic drilling as compared to dry drilling. At higher N input and lower f(r), the exit F-d can be reduced by up to 9% using cryogenic drilling as compared with dry drilling. In terms of hole quality, cylindricity (CYL) decreased by up to 42.69%, lower deviation in average hole size, and decreased average surface roughness (R-a) up to 20% when using cryogenic drilling. The results show that using the multi-jet cryogenic cooling system provides enhanced composite machinability and sustainability for industrial use. (c) 2022 The Author(s). Published by Elsevier B.V.
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    Hybrid cooling-lubrication strategies to improve surface topography and tool wear in sustainable turning of Al 7075-T6 alloy
    (Springer London Ltd, 2019) Gupta, Munish Kumar; Mia, Mozammel; Singh, GurRaj; Pimenov, Danil Yu; Sarikaya, Murat; Sharma, Vishal S.
    In machining of soft alloys, the sticky nature of localized material instigated by tool-work interaction exacerbates the tribological attitude and ultimately demeans it machinability. Moreover, the endured severe plastic deformation and originated thermal state alter the metallurgical structure of machined surface and chips. Also, the used tool edges are worn/damaged. Implementation of cooling-lubrication (C/L) agents to reduce friction at faying surfaces can ameliorate overall machinability. That is why, this paper deliberately discussed the influence of pure C/L methods, i.e., such as dry cutting (DC) and nitrogen cooling (N-2), as well as hybrid C/L strategies, i.e., nitrogen minimum quantity lubrication (N(2)MQL) and Ranque-Hilsch vortex tube (RHVT) N(2)MQL conditions in turning of Al 7075-T6 alloy, respectively. With respect to the variation of cutting speed and feed rate, at different C/Ls, the surface roughness, tool wear, and chips are studied by using SEM and 3D topographic analysis. The mechanism of heat transfer by the cooling methods has been discussed too. Furthermore, the new chip management model (CMM) was developed under all C/L conditions by considering the waste management aspects. It was found that the R-N(2)MQL has the potential to reduce the surface roughness up to 77% and the tool wear up to 118%. This significant improvement promotes sustainability in machining industry by saving resources. Moreover, the CMM showed that R-N(2)MQL is more attractive for cleaner manufacturing system due to a higher recyclability, remanufacturing, and lower disposal of chips.
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    Improvement of machinability of Ti and its alloys using cooling-lubrication techniques: a review and future prospect
    (Elsevier, 2021) Pimenov, Danil Yu; Mia, Mozammel; Gupta, Munish K.; Machado, Alisson R.; Tomaz, Italo, V; Sarikaya, Murat; Wojciechowski, Szymon
    Products made of titanium and its alloys are widely used in modern areas like the mechanical engineering, instrument making, aerospace and medical sector. High strength and low thermal conductivity are the causes of difficulties with the machinability of these alloys. It is important to find ways to increase machinability by cutting titanium alloys. One way to implement this is to apply various methods of cooling on workpieces of titanium alloys and on cutting tools during machining. In this review article, an extensive analysis of the literature on such cooling techniques as dry, conventional cooling system, minimum quantity of lubricant (MQL), minimum quantity cooling lubrication (MQCL), cryogenic lubrication, and high-pressure cooling (HPC) is performed. The following groups of Ti alloys are considered: high-strength structural and high-temperature Ti alloys, intermetallic compounds, pure titanium, as well as composites CFRPs/Ti alloys. For the processes of turning, milling, drilling, and grinding, etc. it is shown how the type of cooling affects the surface integrity include surface roughness, tool wear, tool life, temperature, cutting forces, environmental aspects, etc. The main advantages, disadvantages and prospects of different cooling methods are also shown. The problems and future trends of these methods for the machining of Ti and its alloys are indicated. (c) 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Products made of titanium and its alloys are widely used in modern areas like the mechanical engineering, instrument making, aerospace and medical sector. High strength and low thermal conductivity are the causes of difficulties with the machinability of these alloys. It is important to find ways to increase machinability by cutting titanium alloys. One way to implement this is to apply various methods of cooling on workpieces of titanium alloys and on cutting tools during machining. In this review article, an extensive analysis of
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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.