Abstract
The article presents the methodology of conducting research on temperature distribution in the cutting zone for orthogonal turning without the use of a cooling liquid. AISI 321 austenitic steel was chosen as the workpiece material to be tested, while TNMA160408 carbide inserts, with a flat rake face made of H10F carbide, were chosen as the cutting edges. The research used infrared imaging, which still poses many research problems. The author's own method of calibration of the measurement chain is also presented. In addition, the most common causes of inaccuracies in thermovision measurements of cutting temperatures are discussed. The obtained temperature distribution maps were related to the average contact temperature determined by the method of natural thermocouple – chips/rake face.
Highlights
It is generally known that heat during the cutting process is generated in the primary plastic deformation zone and in the friction zone of the chip against the rake face of the cutting edge
The total amount of heat generated during the cutting process is extracted from the cutting zone by lifting together with the chip, moves to the tool cutting edge and in a negligible part flows into the workpiece (Grzesik 2016, Stephenson, Agapiou 2016)
During thermovision measurements of temperature distribution in the cutting zone, special attention was paid to the observation of the chip upper surface
Summary
It is generally known that heat during the cutting process is generated in the primary plastic deformation zone and in the friction zone of the chip against the rake face of the cutting edge. It is well known that it is difficult to measure the temperature in the cutting zone, and especially in the immediate vicinity of the contact zone This is often done by placing a thermocouple inside the cutting edge (Aneiro et al 2008, Yvonnet et al 2006) but with carbide cutting edges it is not easy. Pyrometric measurements were predominant in cutting temperature measurements, but with time and the progress of electronics, thermographic and thermovision methods are becoming increasingly important (Heigel et al 2017, Zhao et al 2018) They make it quite easy to determine the temperature distribution on the surfaces of the cutting zone, but they require a careful determination of the emissivity coefficient of the surface being tested. This necessity is due to the fact that the value of the surface emissivity coefficient has a significant impact on the measurement result (Arrazola 2008, Rech 2006)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
