期刊
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
卷 119, 期 1-2, 页码 631-646出版社
SPRINGER LONDON LTD
DOI: 10.1007/s00170-021-08235-4
关键词
Turning; Nanofluid; Minimum quantity lubrication; Texture; Microdroplet
资金
- National Key Research and Development Plan [2020YFB2010500]
- National Natural Science Foundation of China [51975305, 51905289]
- Major Research Project of Shandong Province [2019GGX104040, 2019GSF108236]
- Major Science and Technology Innovation Engineering Projects of Shandong Province [2019JZZY020111]
- Natural Science Foundation of Shandong Province [ZR2020KE027]
Nanofluid minimum quantity lubrication is a new process for clean manufacturing, but effective lubrication during turning requires changing the microstructure of the tool rake face to provide a channel for lubricant diffusion. The arrangement of textures has a significant impact on cutting performance, with textures perpendicular to the main cutting edge direction achieving lowest cutting force and optimal workpiece surface.
Due to the stringent requirements of carbon emissions, traditional cutting using a large amount of mineral-based metal cutting fluid for lubrication no longer fulfilled the rigorous requirements of policies and standards. Nanofluid minimum quantity lubrication has been proven to be a new process to achieve clean manufacturing. However, due to adhesive contact friction, lubricant droplets cannot effectively penetrate the tool and workpiece interface during continuous turning. Changing the microstructure of the rake face of the tool, such as the micro-texture, may provide a geometric channel for the diffusion of the lubricant. However, the effects of micro-texture geometry and arrangement on the film formation and tribological properties of droplets have not been revealed yet. The spreading behavior of minimum quantity lubrication atomized microdroplet on the textured surface was calculated by hydrodynamic modeling. It was proven that the microchannel can effectively store the lubricating medium atomized by compressed air pneumatics. Furthermore, a comparative experiment was conducted on the influence of the texture arrangement on the cutting performance through the turning experiment. Results show that the microgrooves in the direction perpendicular to the main cutting edge obtained the lowest cutting force. The feed force, radial force, and tangential force were reduced by 13.46%, 16.23%, and 6.34%, respectively. Meanwhile, the texture arranged parallel to the cutting edge and crosswise increased the cutting force. The arrangement of the texture perpendicular to the main cutting edge direction obtained the optimal workpiece surface, the smallest chip curling radius, and the smoothest chip surface. Under the optimized texture arrangement, the anti-wear and anti-friction properties of nanofluids in the cutting area are enhanced.
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