On the instability of chip flow in high-speed machining

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	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)
	2018
会议日期	MAY 17-20, 2016
会议地点	Madrid, SPAIN
关键词	High-speed machining Shear banding Serrated chip flow Thermoplastic instability
页码	104-119
英文摘要	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.
会议录	MECHANICS OF MATERIALS
资助机构	NSFC [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]
语种	英语
WOS记录号	WOS:000419411100009
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/78569]
专题	力学研究所_非线性力学国家重点实验室力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.{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
推荐引用方式 GB/T 7714	Ye GG,Jiang MQ,Xue SF,et al. On the instability of chip flow in high-speed machining[C]. 见:. Madrid, SPAIN. MAY 17-20, 2016.