Rotating Tool Point Frequency Response Prediction Using RCSA

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This article describes the prediction of rotating tool point frequency response functions using receptance coupling substructure analysis (RCSA). In this approach, the at-speed spindle-machine dynamics are identified by impact tests of a rotating cylindrical standard artifact. After removing the portion of the artifact beyond the holder flange in simulation, models of arbitrary tool-holder combinations are coupled to the spindle response to predict the speed-dependent tool Point frequency response. Given this information, process dynamics predictions for spindles that exhibit dynamic changes with rotating speed are made possible without detailed knowledge of the spindle geometry, assembly tolerances, etc. Experimental results and comparisons with prediction are provided.