Use of process signals for tool wear progression sensing in drilling small deep holes |
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Authors: | R Heinemann S Hinduja G Barrow |
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Affiliation: | (1) School of Mechanical, Aerospace and Civil Engineering, Faculty of Engineering and Physical Sciences, The University of Manchester, Sackville Street, P.O. Box 88, Manchester, M60 1QD, United Kingdom |
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Abstract: | Detailed knowledge about the relation between wear progression of a cutting tool and the cutting forces generated is of paramount
importance for the development of a tool condition monitoring strategy. This paper discusses the changes in the different
process signals with progressing tool wear of small diameter twist drills (D=1.5 mm), when drilling boreholes having a depth
of 10 times the diameter in plain carbon steel using MQL. The effect of different wear patterns on the process signals is
presented. Furthermore, several features, which evolve over the life of the drills, are identified and extracted from the
process signals. Knowledge about the evolution of these features can support the user to determine the final tool life stage,
so that the drill can be replaced before the final fracture occurs. |
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Keywords: | Drilling End-of-tool-life Monitoring Wear |
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