A review of temperature measurement methods for twist drilling processes Online publication date: Thu, 26-Dec-2013
by Charles J. Guthy; Xiaotian Zou; Z.J. Pei; Xingwei Wang
International Journal of Machining and Machinability of Materials (IJMMM), Vol. 13, No. 4, 2013
Abstract: The high temperatures experienced by twist drills during drilling processes wear them down and shorten their useable lifespan. To design new twist drills, drill coatings, coolants, and cooling methods that minimise the damage caused by heat, researchers and engineers need to measure the temperature of and the temperature distribution in drills and workpieces accurately and precisely. To that end, this paper reviews a variety of temperature measurement methods for twist drilling, detailing how they work, as well as their advantages and disadvantages. It divides these methods into four categories: invasive methods (thermocouples), semi-invasive methods (thermal paint), non-invasive methods (pyrometers and infrared cameras), and metallurgical methods (metallography and energy dispersive X-ray measurement). It also reviews temperature measurement methods that could prove very useful in future drilling studies (thin-film thermocouples and optical fibre sensors).
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