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.
|Number of pages||8|
|Early online date||30 Aug 2017|
|Publication status||Published - 2017|
|Event||IUTAM Symposium on Nonlinear and Delayed Dynamics of Mechatronic Systems - Minggugong Campus, Nanjing University of Aeronautics and Astronautics, Nanjing, China|
Duration: 17 Oct 2016 → 21 Oct 2016
Bibliographical noteThis 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.
- Coulomb Stribeck
- Frictional chatter
- Regenerative grinding chatter
- Workpiece Imbalance