The effects of progressive wear on the frequency characteristic of acoustic emission acquired during face milling

M L Jakobsen, Peter Wilkinson, James Barton, Robert Lewis Reuben, David Harvey, Julian David Clayton Jones

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Acoustic emission (AE) provides a non-intrusive means of monitoring insert flank wear in face milling. Progressive wear tests of carbide inserts in eight-point milling of annealed En24 steel were instrumented with piezoelectric AE transducers and a non-contact optical interferometer, from which AE frequency information could be extracted. Mean AE frequency was found generally to decrease with wear in agreement with other published studies. Tool indexed measurements enabled the time evolution of the frequency content to be studied on the timescale of a single pass of the insert. The results may be explained by a simple analytical model for AE frequency associated with plastic deformation. The observed AE decay time constants following insert entry decreased with cutting speed, consistent with thermal models of the cutting process. Whereas the results of this study alone would not constitute an independent means of tool wear monitoring, they could provide a diagnosis of tool wear when supplemented with other AE measures and with knowledge of the specific cutting process. © IMechE 2005.

Original languageEnglish
Pages (from-to)803-810
Number of pages8
JournalProceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
Volume219
Issue number11
DOIs
Publication statusPublished - 1 Nov 2005

Keywords

  • tool wear monitoring
  • acoustic emission
  • frequency content
  • face milling
  • SAGNAC INTERFEROMETER
  • TOOL WEAR

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