Sensor-less tool fracture detection applying disturbance observer theory

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

Detection of a tool fracture is necessary to ensure cutting accuracy and to avoid a tool breakage because tool fracture is one of the significant prediction signals of the tool breakage. For monitoring the tool condition, generally additional sensors are used. However using these sensors causes high cost and increase of failure rate. In this paper, a novel sensor-less detection method of tool fracture in drilling process is proposed on the basis of a disturbance observer theory. It is applied to the x-y stage of the machine tool. The proposed method requires no external sensor because it uses only the servo information of the spindle control system. Since structures of normal drills with two floats are symmetrical with respect to a point, theoretically the cutting force in the x and y directions does not work. When the drill is fractured, its structure becomes asymmetry so that unbalanced forces would exert in the x and y directions at intervals of the spindle speed. Therefore, it is possible to detect a tool fracture by the frequency analysis of estimated disturbance force with a wavelet transform. The experimental results show that the proposed method is available for detection of the small tool fracture effectively.

本文言語English
ホスト出版物のタイトルEmerging Technology in Precision Engineering XIV
出版社Trans Tech Publications Ltd
ページ439-444
ページ数6
ISBN(印刷版)9783037855096
DOI
出版ステータスPublished - 2012
イベント14th International Conference on Precision Engineering, ICPE 2012 - Hyogo, Japan
継続期間: 2012 11 82012 11 10

出版物シリーズ

名前Key Engineering Materials
523-524
ISSN(印刷版)1013-9826
ISSN(電子版)1662-9795

Other

Other14th International Conference on Precision Engineering, ICPE 2012
国/地域Japan
CityHyogo
Period12/11/812/11/10

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

フィンガープリント

「Sensor-less tool fracture detection applying disturbance observer theory」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル