Abstract
The chatter stability in milling severely affects productivity and quality of machining. Tool wear causes both the cutting coefficient and the process damping coefficient, but also other parameters to change with cutting time. This variation greatly reduces the accuracy of chatter prediction using conventional methods. To solve this problem, we consider the cutting coefficients of the milling system to be both random and time-varying variables and we use the gamma process to predict cutting coefficients for different cutting times. In this paper, a time-varying reliability analysis is introduced to predict chatter stability and chatter reliability in milling. The relationship between stability and reliability is investigated for given depths and spindle speeds in the milling process. We also study the time-varying chatter stability and time-varying chatter reliability methods theoretically and with experiments. The results of this study show that the proposed method can be used to predict chatter with high accuracy for different cutting times.
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Liu, Y., Wang, Zy., Liu, K. et al. Chatter stability prediction in milling using time-varying uncertainties. Int J Adv Manuf Technol 89, 2627–2636 (2017). https://doi.org/10.1007/s00170-016-9856-x
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DOI: https://doi.org/10.1007/s00170-016-9856-x