Prediction of the Effect of Heat Generation in Ballscrew on the Accuracy of CNC

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Prediction of the Effect of Heat Generation in Ballscrew on the Accuracy of CNC Milling Machine

Abstract In high speed machining， friction between the
moving parts， generates heat. One of the major causes of
thermal errors in linear axes is the heat generated in ballscrew
during operation at high speed .Thermal errors affect the
accuracy of the linear axes and can cause a deviation from the
nominal machining circular motion. The subject of this paper
is to study the effects of feed velocity and ballscrew Preload on
the accuracy of circular motio n. The temperature rise in the
ballscrew is measured by a laser thermometer. The errors in
the linear and circular motions are measured by laser
interferometer and ball bar. Training a neural network by the
test results， thermal errors in all parts of a ballscrew are
predicted and compared with other test results.