This paper presents a methodology of valve seat machining force model development. A cutting force model coefficients are calibrated without the need of performing separate cutting tests for the blades of the valve seat tool. The developed cutting force model is validated using results of valve seat machining when the misalignement of the tool and workpiece axes was introduced. Also the model for the prediction of the roundess error that employs machine tool dynamics represented by frequency response function and cutting force model is proposed. Prediction quality of the roundness error model is compared to the CMM profile measurements.

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