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Current-sensor-based feed cutting force intelligent estimation and tool wear condition monitoring

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3 Author(s)
Xiaoli Li ; Inst. of Precision Eng., Harbin Inst. of Technol., China ; Djordjevich, A. ; Venuvinod, P.K.

Tool wear condition monitoring has the potential to play a critical role in ensuring the dimensional accuracy of the workpiece and prevention of damage to cutting equipment. It could also help in automating cutting processes. In this paper, the feed cutting force estimated with the aid of an inexpensive current sensor installed on the AC servomotor of a computerized numerical control tuning center is used to monitor tool wear condition. To achieve this, the feed drive system is modeled, using neuro-fuzzy techniques, to provide the framework for estimating the feed cutting force based on the feed motor current measured. Functional dependence of the feed cutting force on tool wear and cutting parameters are then expressed in the form of a difference equation relating variation in the feed cutting force to tool wear rate. The computerized system automatically compares successive feed cutting force estimates and determines the onset of accelerated tool wear in order to issue a request for tool replacement. Experimental results show that the tool wear condition monitoring is effective and industrially applicable

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Industrial Electronics, IEEE Transactions on  (Volume:47 ,  Issue: 3 )