Side Flow Effect on Surface Generation in Nano CuttingReport as inadecuate




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Nanoscale Research Letters

, 12:359

First Online: 19 May 2017Received: 24 March 2017Accepted: 10 May 2017DOI: 10.1186-s11671-017-2136-3

Cite this article as: Xu, F., Fang, F. & Zhang, X. Nanoscale Res Lett 2017 12: 359. doi:10.1186-s11671-017-2136-3

Abstract

The side flow of material in nano cutting is one of the most important factors that deteriorate the machined surface quality. The effects of the crystallographic orientation, feed, and the cutting tool geometry, including tool edge radius, rake angle and inclination angle, on the side flow are investigated employing molecular dynamics simulation. The results show that the stagnation region is formed in front of tool edge and it is characterized by the stagnation radius Rs and stagnation height hs. The side flow is formed because the material at or under the stagnation region is extruded by the tool edge to flow to the side of the tool edge. Higher stagnation height would increase the size of the side flow. The anisotropic nature of the material which partly determines the stagnation region also influences the side flow due to the different deformation mechanism under the action of the tool edge. At different cutting directions, the size of the side flow has a great difference which would finally affect the machined surface quality. The cutting directions of {100} < 011>, {110} < 001>, and {110} < 1-10 > are beneficial to obtain a better surface quality with small side flow. Besides that, the side flow could be suppressed by reducing the feed and optimizing the cutting tool geometry. Cutting tool with small edge radius, large positive rake angle, and inclination angle would decrease the side flow and consequently improve the machined surface quality.

KeywordsNano cutting Side flow Surface generation Plastic deformation Cutting mechanism AbbreviationsMDMolecular dynamics

UCTUncut chip thickness





Author: Feifei Xu - Fengzhou Fang - Xiaodong Zhang

Source: https://link.springer.com/







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