Detection of tool fracture is important to avoid tool breakage and ensure cutting accuracy. Though additional sensors are generally used for monitoring a tool condition, installing them causes high cost and increase of failure rate. In this study, a novel in-process method to detect a tool fracture is proposed on the basis of a disturbance observer theory. It uses only servo information in a ballscrew driven stage and never requires external sensors. Furthermore, a rotational digital filter is invented and applied to drilling tests to improve the detection accuracy. A tool fracture is successfully detected by the proposed method.
|出版ステータス||Published - 2012|
|イベント||3rd CIRP Conference on Process Machine Interactions, PMI 2012 - Nagoya, Japan|
継続期間: 2012 10月 29 → 2012 10月 30
ASJC Scopus subject areas