|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)
|发表期刊||MECHANICS OF MATERIALS
|摘要||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. (C) 2017 Elsevier Ltd. All rights reserved.|
Serrated Chip Flow
|关键词[WOS]||ADIABATIC SHEAR BANDS
; ALUMINUM-ALLOY A2024-T351
; THERMOMECHANICAL RESPONSE
; CUTTING PROCESS
; STRAIN RATES
; INCONEL 718
; 1045 STEEL
|WOS类目||Materials Science, Multidisciplinary
; 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)
Ye GG,Jiang MQ,Xue SF,et al. On the instability of chip flow in high-speed machining[J]. MECHANICS OF MATERIALS,2018,116:104-119.
叶贵根,蒋敏强,Xue SF,马维,&戴兰宏.(2018).On the instability of chip flow in high-speed machining.MECHANICS OF MATERIALS,116,104-119.
叶贵根,et al."On the instability of chip flow in high-speed machining".MECHANICS OF MATERIALS 116(2018):104-119.