Temperature field model and experimental verification on cryogenic air nanofluid minimum quantity lubrication grinding

Zhang, Jianchao; Li, Changhe; Zhang, Yanbin; Yang, Min; Jia, Dongzhou; Hou, Yu; Li, Runze

doi:10.1007/s00170-018-1936-7

Cited by 45 publications

(6 citation statements)

References 34 publications

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“…The peak grinding temperatures of PMQL, as well as four different concentrations of NPEC conditions, were significantly lower relative to the dry conditions. This finding may be due to the superior cooling capacity provided by the oil film generated by the metal saponification reaction in the grinding zone [227]. As shown in Fig.…”

Section: Grindingmentioning

confidence: 84%

Nanoparticle-enhanced coolants in machining: mechanism, application, and prospects

Hu,

Li,

Zhou

et al. 2023

Front. Mech. Eng.

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Nanoparticle-enhanced coolants (NPECs) are increasingly used in minimum quantity lubrication (MQL) machining as a green lubricant to replace conventional cutting fluids to meet the urgent need for carbon emissions and achieve sustainable manufacturing. However, the thermophysical properties of NPEC during processing remain unclear, making it difficult to provide precise guidance and selection principles for industrial applications. Therefore, this paper reviews the action mechanism, processing properties, and future development directions of NPEC. First, the laws of influence of nano-enhanced phases and base fluids on the processing performance are revealed, and the dispersion stabilization mechanism of NPEC in the preparation process is elaborated. Then, the unique molecular structure and physical properties of NPECs are combined to elucidate their unique mechanisms of heat transfer, penetration, and antifriction effects. Furthermore, the effect of NPECs is investigated on the basis of their excellent lubricating and cooling properties by comprehensively and quantitatively evaluating the material removal characteristics during machining in turning, milling, and grinding applications. Results showed that turning of Ti–6Al–4V with multi-walled carbon nanotube NPECs with a volume fraction of 0.2% resulted in a 34% reduction in tool wear, an average decrease in cutting force of 28%, and a 7% decrease in surface roughness Ra, compared with the conventional flood process. Finally, research gaps and future directions for further applications of NPECs in the industry are presented.

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Section: Grindingmentioning

confidence: 84%

Nanoparticle-enhanced coolants in machining: mechanism, application, and prospects

Hu,

Li,

Zhou

et al. 2023

Front. Mech. Eng.

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“…In the context of grinding, the cooling effect provided by the grinding fluid plays a significant role. Therefore, when considering non-dry grinding processes, determining the convective heat transfer coefficient becomes a crucial factor in calculating the temperature of the grinding surface [100,143,151,202,203]. However, due to the inherent uncertainty associated with physical parameters such as the coolant, workpiece, and grinding wheel, quantifying the convective heat transfer coefficient (h) accurately based on scientific principles is challenging.…”

Section: Heat Transfer Coefficient Modelmentioning

confidence: 99%

Temperature field model in surface grinding: a comparative assessment

Yang,

Kong,

et al. 2023

Int. J. Extrem. Manuf.

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Grinding is a crucial process in machining workpieces because it plays a vital role in achieving the desired precision and surface quality. However, a significant technical challenge in grinding is the potential increase in temperature due to high specific energy, which can lead to surface thermal damage. Therefore, ensuring control over the surface integrity of workpieces during grinding becomes a critical concern. This necessitates the development of temperature field models that consider various parameters, such as workpiece materials, grinding wheels, grinding parameters, cooling methods, and media, to guide industrial production. This study thoroughly analyzes and summarizes grinding temperature field models. First, the theory of the grinding temperature field is investigated, classifying it into traditional models based on a continuous belt heat source and those based on a discrete heat source, depending on whether the heat source is uniform and continuous. Through this examination, a more accurate grinding temperature model that closely aligns with practical grinding conditions is derived. Subsequently, various grinding thermal models are summarized, including models for the heat source distribution, energy distribution proportional coefficient, and convective heat transfer coefficient. Through comprehensive research, the most widely recognized, utilized, and accurate model for each category is identified. The application of these grinding thermal models is reviewed, shedding light on the governing laws that dictate the influence of the heat source distribution, heat distribution, and convective heat transfer in the grinding arc zone on the grinding temperature field. Finally, considering the current issues in the field of grinding temperature, potential future research directions are proposed. The aim of this study is to provide theoretical guidance and technical support for predicting workpiece temperature and improving surface integrity.

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“…6.1 Grinding temperature An et al [218] studied the effect of CA and CA + MQL on grinding temperature of Ti-6Al-4V with different cutting depths. The temperature of the grinding zone increases to more than 400 °C with the increase in cutting depth, resulting in film boiling of cutting fluid and loss of heat transfer capability.…”

Section: Grinding Performance Of Cmqlmentioning

confidence: 99%

Cryogenic minimum quantity lubrication machining: from mechanism to application

et al. 2021

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Cutting fluid plays a cooling-lubrication role in the cutting of metal materials. However, the substantial usage of cutting fluid in traditional flood machining seriously pollutes the environment and threatens the health of workers. Environmental machining technologies, such as dry cutting, minimum quantity lubrication (MQL), and cryogenic cooling technology, have been used as substitute for flood machining. However, the insufficient cooling capacity of MQL with normal-temperature compressed gas and the lack of lubricating performance of cryogenic cooling technology limit their industrial application. The technical bottleneck of mechanical—thermal damage of difficult-to-cut materials in aerospace and other fields can be solved by combining cryogenic medium and MQL. The latest progress of cryogenic minimum quantity lubrication (CMQL) technology is reviewed in this paper, and the key scientific issues in the research achievements of CMQL are clarified. First, the application forms and process characteristics of CMQL devices in turning, milling, and grinding are systematically summarized from traditional settings to innovative design. Second, the cooling-lubrication mechanism of CMQL and its influence mechanism on material hardness, cutting force, tool wear, and workpiece surface quality in cutting are extensively revealed. The effects of CMQL are systematically analyzed based on its mechanism and application form. Results show that the application effect of CMQL is better than that of cryogenic technology or MQL alone. Finally, the prospect, which provides basis and support for engineering application and development of CMQL technology, is introduced considering the limitations of CMQL.

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Temperature field model and experimental verification on cryogenic air nanofluid minimum quantity lubrication grinding

Cited by 45 publications

References 34 publications

Nanoparticle-enhanced coolants in machining: mechanism, application, and prospects

Nanoparticle-enhanced coolants in machining: mechanism, application, and prospects

Temperature field model in surface grinding: a comparative assessment

Cryogenic minimum quantity lubrication machining: from mechanism to application

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