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標題: Model development for tool wear effect on AE signal generation in micromilling
關鍵字: Orthogonal cutting;Acoustic emission;Tool wear monitoring;Micromilling
Project: The International Journal of Advanced Manufacturing Technology, Volume 66, Issue 9-12, Page(s) 1845-1858.
A model for the relation between the acousticemission signal generation and tool wear was established forcutting processes in micromilling by considering the acousticemission (AE) generation and propagation mechanisms. Inaddition, the effect of tool wear on the AE signal generationin frequency and amplitude was studied. In the model development,the finite element analysis was first used to calculatethe shear strain rate distribution on the shear plane based onthe orthogonal cutting assumption. Conversely, the contactstress distribution of workpiece on the flank wear face wasestablished based on the Waldorf model. Following the finiteelement method, the dislocation density in materials wascalculated based on Orowan’s law with the calculated stressrate. Finally, the AE signal detected by the sensor was calculatedby considering the Gaussian probability density functionfor the distribution of AE source on the shear plane and theone-dimension wave equation for AE signal propagation.Based on the developed model, the effect of tool wear on theAE signal generation was investigated and compared to theexperimental results. The results obtained from these investigationsindicate that the proposed model can be used topredict the effect of tool wear on the AE signal generation
DOI: 10.1007/s00170-012-4464-x
Appears in Collections:機械工程學系所

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