Research of On-line Monitoring Technology of Machining Accuracy of CNC Machine Tools

This paper analyzes CNC machine tools' machining error sources, put forward a kind of on-line monitoring technology of CNC machine tools' machining accuracy based on online neural network. Through the establishment of CNC machine tools condition monitoring platform, collection sensor signal of the key components of CNC machine tools, using time domain and frequency domain method of the original signal processing, extract the characteristic related to machining accuracy change, input to the neural network, identification the changes of machining accuracy. The experimental results show that, the on-line monitoring technology based on neural network, can identify the changes of machining accuracy.