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Proceedings Paper

Thermal EMF method for monitoring drilling tool wear
Author(s): Haili Pan; Bangjian An; Yu-bao Chen; Elsayed Orady
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Paper Abstract

This paper describes a techniQue for on-line monitoring of drilling tool wear based on the thermal EMF (electromotive force) signal. The EMF signal was obtained from a natural thermocouple consisting of the tool (H. S. S.) and workpiece (AISI 1045) metals. The natural thermocouple is thus used as a kind of functional sensor which is sensitive to the cutting zone. The signal was collected and analyzed for three experiments at different cutting conditions. Analysis was carried out in time, frequency and amplitude domains. Several indices for the EMF signal were computed and their relationships with the tool wear were constructed. The results showed that the thermal EMF signal can be used to identify the occurrence of abnormal tool wear on major cutting edges and can indicate the end of tool life. Tool breakage can also be predicted. Consequently, a methodology for monitoring drilling tool wear can be established.

Paper Details

Date Published: 22 September 1993
PDF: 11 pages
Proc. SPIE 2101, Measurement Technology and Intelligent Instruments, (22 September 1993); doi: 10.1117/12.156418
Show Author Affiliations
Haili Pan, Shanghai Second Polytechnic Univ. (China)
Bangjian An, Shanghai Second Polytechnic Univ. (China)
Yu-bao Chen, Univ. of Michigan/Dearborn (China)
Elsayed Orady, Univ. of Michigan/Dearborn (China)


Published in SPIE Proceedings Vol. 2101:
Measurement Technology and Intelligent Instruments

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