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A Study on the Wear Estimation of End Mill Using Sound Frequency Analysis

음향주파수 분석에 의한 엔드밀의 마모상태 추정에 관한 연구

  • 이창희 (구미기능대학 자동화시스템과) ;
  • 조택동 (충남대학교 기계설계공학과)
  • Published : 2003.08.01

Abstract

The wear process of end mill is so complicated process that a more reliable technique is required for the monitoring and controlling the tool life and its performance. This research presents a new tool wear monitoring method based on the sound signal generated on the machining. The experiment carried out continuous-side-milling for 4 cases using the high-speed-steel end mill under wet condition. The sound pressure was measured at 0.5m from the cutting zone by a dynamic microphone, and was analyzed at frequency domain. As the cutter impacts the workpiece surface, a situation of farced vibration arises in which the dominant forcing frequency is equal to the tooth passing frequency of the cutter. The tooth passing frequency appears as a harmonics form, and end mill flank wear is related with the first harmonic. It is possible to detect end . mill flank wear. This paper proposed the new method of the end mill wear detection.

Keywords

End Mill;Cutting Sound;Flank Wear;FFT;Harmonic;Tooth Passing Frequency

References

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