Real-Time Prediction of Workpiece Errors for a CNC Turning Centre, Part 4. Cutting-Force-Induced Errors |
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Authors: | X Li |
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Affiliation: | (1) Department of Manufacturing Engineering, City University of Hong Kong, Hong Kong, HK |
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Abstract: | A neural network method is presented for predicting cutting-force-induced errors in real-time during turning operations based
on the estimated cutting forces. Workpiece errors can be considerably affected by the deflections of the machine–workpiece–tool
system. A model of the elastic deflections of the machine–workpiece–tool system due to the cutting force in turning developed.
A novel radial basis function (RBF) neural network is used to map the relationship between the cutting-force components (radial,
axial and tangential) and the consequent dimensional deviation of the finished parts caused by the combined deflections of
the machine–workpiece–tool system. Cutting tests were performed on a two-axis CNC turning centre and the experimental results
showed that the prediction accuracy of the maximum diameter error of the workpiece was within 15%. The trained RBF neural
network was able to predict the cutting force induced error in real-time during turning. |
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Keywords: | :Cutting force Neural network Turning Workpiece error |
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