Abstract
In high-speed sawing, the penetration of cutting fluid is limited due to the narrow kerf and large cutting depth. To improve the machining performance of high-speed sawing and the lubrication and cooling efficiency of cutting fluid, a technology named electrostatic minimum quantity lubrication (EMQL) high-speed sawing with water-based nanofluid as cutting fluids was developed. The adsorption and motion characteristics of droplets on the solid surface under airflow were studied. Furthermore, the machinability of EMQL in high-speed sawing was explored. The results show that the charged droplet’s surface tension, static contact angle, and velocity under tangential airflow are lower than those of the uncharged droplet, while the dynamic contact angle hysteresis is higher. This indicates that the adsorbability of charged droplets on solid surface is enhanced. In high-speed sawing processing, the principal sawing force is reduced by 19% when the fluid is charged at − 4 kV. The reason may be that charging reduces the drag force of the droplet and increases the capillary force generated by the deformation of the contact line between the droplet and the solid surface, which enhances the adsorption capacity of the charged droplets on the sawtooth surfaces and improves the lubrication performance of the sawing area.
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This work was funded by the National Key Research and Development Program of China, grant number 2020YFB2010604; the National Natural Science Foundation of China, grant number 52275468; and the Basic Public Welfare Research Program of Zhejiang Province, grant number Y23E050073.
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All the authors have contributed to the creation of this manuscript for important intellectual content and approved the final manuscript. Xiaodong Hu: conceptualization, methodology, software, data curation, formal analysis, writing-original draft, writing-review and editing. Junhao Yu: conceptualization, resources, writing-review and editing, supervision. Guoqiang Guo: methodology, writing-review and editing. Yangyu Wang: formal analysis, investigation, methodology. Yangyang Zhao: formal analysis, investigation, methodology, writing-review and editing. Yu Xia: supervision, writing-review and editing. Yaoyun Xu: supervision, writing-review and editing. Ruihong Zhou: supervision, writing-review and editing. Ruochong Zhang: conceptualization, formal analysis, investigation, methodology, supervision, writing-review and editing.
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Hu, X., Yu, J., Guo, G. et al. Adsorption and motion characteristics of charged droplet on sawtooth surfaces and machinability evaluation. Int J Adv Manuf Technol 124, 3631–3643 (2023). https://doi.org/10.1007/s00170-023-10817-3
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DOI: https://doi.org/10.1007/s00170-023-10817-3