Sensorless monitoring of cutting force variation with fractured tool under heavy cutting condition

Yuki Yamada, Yasuhiro Kakinuma, Takamichi Ito, Jun Fujita, Hirohiko Matsuzaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Cutting force is widely regarded as being the one of the most valuable information for tool condition monitoring. Considering sustainability, sensorless cutting force monitoring technique using inner information of machine tool attracts attention. Cutting force estimation based on motor current is one of the example, and it is applicable to detection of tool breakage with some signal processing technique. However, current signal could not capture fast variation of cutting force. By improving monitoring performance of cutting force, the hidden tool condition information is more accessible. In this study, monitoring performance of cutting force variation due to tool fracture was enhanced by using multiencoder- based disturbance observer (MEDOB) and simple moving average. Friction force and torque which deteriorate monitoring performance was eliminated by moving average. First, monitoring accuracy of cutting force was verified through end milling test. Next, local peak value of estimated cutting force was extracted and the ratio of neighboring peak value was calculated to capture the tool fracture. Estimated value using MEDOB could capture the variation resulting from tool fracture.

Original languageEnglish
Title of host publicationJoint MSEC-NAMRC Symposia
PublisherAmerican Society of Mechanical Engineers
Volume3
ISBN (Electronic)9780791849910
DOIs
Publication statusPublished - 2016
EventASME 2016 11th International Manufacturing Science and Engineering Conference, MSEC 2016 - Blacksburg, United States
Duration: 2016 Jun 272016 Jul 1

Other

OtherASME 2016 11th International Manufacturing Science and Engineering Conference, MSEC 2016
CountryUnited States
CityBlacksburg
Period16/6/2716/7/1

Keywords

  • Ballscrew drive
  • Multi-encoder-based disturbance observer
  • Sensorless
  • Tool fracture

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering

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    Yamada, Y., Kakinuma, Y., Ito, T., Fujita, J., & Matsuzaki, H. (2016). Sensorless monitoring of cutting force variation with fractured tool under heavy cutting condition. In Joint MSEC-NAMRC Symposia (Vol. 3). American Society of Mechanical Engineers. https://doi.org/10.1115/MSEC20168820