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Investigations of vibration cutting mechanisms of Ti6Al4V alloy
Sun ZT(孙宗涛); Shuang F(双飞); Ma W(马维)
Source PublicationINTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
2018-11-01
Volume148Pages:510-530
ISSN0020-7403
Abstract

This work involves systematical study of high-speed vibration cutting process of Ti6Al4Von numerical and theoretical aspects for the first time. In numerical simulations, the one-tool and double-tool cutting models are established based on the coupling Eulerian-Lagrangian (CEL) finite element (FE) method, to simulate forced vibration (FV) and self-excited vibration (SEV) cutting phenomena respectively. In theoretical analysis, linear perturbation method is used to analyze the critical condition of shear localized instability of chip material in the FV cutting process, and stability limits analysis is performed to study the tool vibration stability in the SEV cutting process, which consider coupled effects of wavy cutting thickness and periodic instability of shear bands. Different from vibration assisted machining in low-speed cutting, it is found FV with attainable frequency in industry promotes the evolution of shear bands, increase the cutting force and reduce the machined quality, whereas high-frequency FV can help improve the cutting process. On the other hand, SEV with smooth cutting thickness is found an effective strategy to weaken the evolution of shear bands and decrease cutting force in the high-speed cutting. The stability limit of SEV is related to the friction damping coefficient at the rack face, the penetration damping resistance, the ratio of the oscillation frequency of top wavy surface and the instability frequency of shear bands. These findings would help deepen the understanding towards the vibration effects in metal cutting and provide practical guidance to retrain and utilize vibration in the vibration assisted machining.

KeywordMetal vibration cutting Stability limit Shear banding instability Machine wavy surface Orthogonal cutting process
DOI10.1016/j.ijmecsci.2018.09.006
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000448097900043
WOS KeywordTOOL NOSE RADIUS ; CHATTER VIBRATION ; CHIP FORMATION ; REGENERATIVE CHATTER ; TUNGSTEN CARBIDE ; ANALYTICAL-MODEL ; SHEAR ; STABILITY ; METAL ; NONLINEARITIES
WOS Research AreaEngineering, Mechanical ; Mechanics
WOS SubjectEngineering ; Mechanics
Funding OrganizationNational Nature Science Foundation of China [51575029, 11572337, 11772346]
Classification一类
Ranking1
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78130
Collection流固耦合系统力学重点实验室
AffiliationChinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Sun ZT,Shuang F,Ma W. Investigations of vibration cutting mechanisms of Ti6Al4V alloy[J]. INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES,2018,148:510-530.
APA Sun ZT,Shuang F,&Ma W.(2018).Investigations of vibration cutting mechanisms of Ti6Al4V alloy.INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES,148,510-530.
MLA Sun ZT,et al."Investigations of vibration cutting mechanisms of Ti6Al4V alloy".INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES 148(2018):510-530.
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