Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7178590 | Mechanics of Materials | 2018 | 16 Pages |
Abstract
High cutting speed usually gives rise to a breakdown of steady chip flow and results in a serrated flow pattern, which is one of the most fundamental and challenging problems in metal cutting. Here, we systematically analysed the experimental results of high-speed cutting on various typical metallic materials over wide ranges of cutting speeds. With considering the coupling effects of inertial, tool-chip compression and material convection, the critical condition for the onset of serrated chip flow is determined based on a stability analysis of the deformation inside primary shear zone. It is found that the emergence of the serrated chip flow is dominated by a dimensionless number which characterized the competition among the effects of inertia, thermal softening, strain hardening, elastic unloading, viscous diffusion and thermal diffusion. More interestingly, a power law between the serration frequency and the Reynolds thermal number Pe is clearly revealed.
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Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
G.G. Ye, M.Q. Jiang, S.F. Xue, W. Ma, L.H. Dai,