Measurement of cutting tool temperature by an infrared pyrometer

• Published in: Measurement science & technology Vol. 12; no. 8; pp. 1243 - 1249
• Main Authors: Lin, Jehnming, Liu, Chang-Yi
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.08.2001; Institute of Physics
• Subjects: Bolometer; infrared, submillimeter wave, microwave and radiowave receivers and detectors; Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors; Exact sciences and technology; High-temperature techniques and instrumentation; pyrometry; Infrared, submillimeter wave, microwave and radiowave instruments, equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Physics; Thermal instruments, apparatus and techniques; Performance evaluation; Optical fibers; Temperature measurement; Temperature distribution; Cutting tools; Infrared pyrometer; Tool steels; Thermocouples; Measurement sensor; Experimental study; On line device
• ISSN: 0957-0233; 1361-6501
• DOI: 10.1088/0957-0233/12/8/335

An infrared (IR) pyrometer system with an optical fibre was developed for measuring the temperature of a cutting tool during turning. The temperature reading of the pyrometer system was compared with the micrographs of the tool steels under welding conditions similar to those of cutting. It can be seen that the temperature of the tool measured by the IR pyrometer with an optical fibre is more accurate than that obtained by other on-line methods such as the conventional thermocouple technique. A one-dimensional ellipsoidal mapping system based on a model mapping of the temperature contours in the cutting tool was adopted in this study. It was used as an extrapolation scheme to predict the tool-chip temperature from the surface temperature measured near the cutting edge. There is a good agreement between the calculations and the metallurgical evidence for ceramic and carbide tools at cutting speeds up to 600 m min exp -1 . (Workpiece material: steel 1045. Cutting tools of M2 steel and silicon nitride.)