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On the instability of chip flow in high-speed machining
Ye GG(叶贵根); Jiang MQ(蒋敏强); Xue SF; Ma W(马维); Dai LH(戴兰宏)
Conference NameIUTAM Symposium on Dynamic Instabilities in Solids
Conference DateMAY 17-20, 2016
Conference PlaceMadrid, SPAIN
AbstractHigh 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. (C) 2017 Elsevier Ltd. All rights reserved.
KeywordHigh-speed machining Shear banding Serrated chip flow Thermoplastic instability
WOS IDWOS:000419411100009
Funding OrganizationNSFC [11472287, 11132011, 11402278, 11572324, 11372315, 11522221]; Key Researh Program of Frontier Sciences [QYZDJSSW-JSC011]; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040302]; Fundamental Research Funds for the Central Universities [15CX02110A]
Indexed ByCPCI-S
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Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type会议论文
Affiliation1.{Jiang, M. Q.、Dai, L. H.} Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China
2.{Ye, G. G.、Xue, S. F.} China Univ Petr, Dept Engn Mech, Coll Pipeline & Civil Engn, Qingdao 266580, Shandong, Peoples R China
3.{Jiang, M. Q.、Dai, L. H.} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China
4.{Ma, W.} Chinese Acad Sci, Key Lab Environm Mech, Inst Mech, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Ye GG,Jiang MQ,Xue SF,et al. On the instability of chip flow in high-speed machining[C]MECHANICS OF MATERIALS,2018:104-119.
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