Real-time monitoring of tool fracture in turning using sensor fusion

D. Choi, W. T. Kwon, C. N. Chu

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


The sensor fusion method using both an acoustic emission (AE) sensor and a built-in force sensor is introduced for online tool condition monitoring during turning. The cutting force was measured by a built-in piezoelectric force sensor, which was inserted in the tool turret housing of an NC lathe. FEM analysis was carried out to locate the most sensitive position for the sensor. A burst of AE signal was used as a triggering signal to inspect the cutting force. A significant drop in cutting force indicated tool breakage. The algorithm was implemented in a DSP board and the monitoring system was installed on a CNC lathe in an FMS line for in-process tool-breakage detection. The proposed system showed an excellent monitoring capability.

Original languageEnglish
Pages (from-to)305-310
Number of pages6
JournalInternational Journal of Advanced Manufacturing Technology
Issue number5
StatePublished - 1999


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