Influence of Workpiece Imbalance on Regenerative and Frictional Grinding Chatters

Yao Yan*, Jian Xu, Marian Wiercigroch

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Citation (Scopus)
4 Downloads (Pure)

Abstract

This paper investigates regenerative and frictional grinding chatters affected by mass eccentricity in the workpiece. Time delays and velocity-soften friction coefficient are employed to represent regenerative and Stribeck effects in normal and tangential grinding forces. Eigenvalue calculation and continuation scheme are used to find stability boundaries for both regenerative and frictional instabilities, illustrating that a deep grinding enhances the regenerative stability but impairs the frictional one. Near each kind of boundaries, numerical simulations and bifurcation analyses are adopted to present various chatter motions in the grinding, either with or without mass eccentricity. It is found that the frictional chatter is prone to be quenched by the external excitation due to the mass eccentricity. On the contrary, the regenerative instability still persists, but is perturbed to be quasi-periodic.

Original languageEnglish
Pages (from-to)146-153
Number of pages8
JournalProcedia IUTAM
Volume22
Early online date30 Aug 2017
DOIs
Publication statusPublished - 2017
EventIUTAM Symposium on Nonlinear and Delayed Dynamics of Mechatronic Systems - Minggugong Campus, Nanjing University of Aeronautics and Astronautics, Nanjing, China
Duration: 17 Oct 201621 Oct 2016

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Time delay
Friction
Computer simulation

Keywords

  • Coulomb Stribeck
  • Frictional chatter
  • Regenerative grinding chatter
  • Workpiece Imbalance

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Influence of Workpiece Imbalance on Regenerative and Frictional Grinding Chatters. / Yan, Yao; Xu, Jian; Wiercigroch, Marian.

In: Procedia IUTAM, Vol. 22, 2017, p. 146-153.

Research output: Contribution to journalArticle

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abstract = "This paper investigates regenerative and frictional grinding chatters affected by mass eccentricity in the workpiece. Time delays and velocity-soften friction coefficient are employed to represent regenerative and Stribeck effects in normal and tangential grinding forces. Eigenvalue calculation and continuation scheme are used to find stability boundaries for both regenerative and frictional instabilities, illustrating that a deep grinding enhances the regenerative stability but impairs the frictional one. Near each kind of boundaries, numerical simulations and bifurcation analyses are adopted to present various chatter motions in the grinding, either with or without mass eccentricity. It is found that the frictional chatter is prone to be quenched by the external excitation due to the mass eccentricity. On the contrary, the regenerative instability still persists, but is perturbed to be quasi-periodic.",
keywords = "Coulomb Stribeck, Frictional chatter, Regenerative grinding chatter, Workpiece Imbalance",
author = "Yao Yan and Jian Xu and Marian Wiercigroch",
note = "This research is supported by National Natural Science Foundation of China under Grant No.11502048 and 11572224, and Fundamental Research Funds for the Central Universities under Grant No.ZYGX2015KYQD033.",
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AB - This paper investigates regenerative and frictional grinding chatters affected by mass eccentricity in the workpiece. Time delays and velocity-soften friction coefficient are employed to represent regenerative and Stribeck effects in normal and tangential grinding forces. Eigenvalue calculation and continuation scheme are used to find stability boundaries for both regenerative and frictional instabilities, illustrating that a deep grinding enhances the regenerative stability but impairs the frictional one. Near each kind of boundaries, numerical simulations and bifurcation analyses are adopted to present various chatter motions in the grinding, either with or without mass eccentricity. It is found that the frictional chatter is prone to be quenched by the external excitation due to the mass eccentricity. On the contrary, the regenerative instability still persists, but is perturbed to be quasi-periodic.

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