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Título
Determining tool/chip temperatures from thermography measurements in metal cuttingAutor-a
Versión
Preprint en revisión
Derechos
© 2018 ElsevierAcceso
Acceso abiertoVersión del editor
https://doi.org/10.1016/j.applthermaleng.2018.09.051Publicado en
Applied Thermal Engineering Vol. 145. Pp. 305-314. 25 December, 2018Primera página
305Última página
314Editor
ElsevierPalabras clave
temperature measurementInfrared thermography
Metal cutting
Orthogonal cutting
Resumen
Temperature measurement in metal cutting is of central importance as tool wear and surface integrity have been demonstrated to be temperature dependent. In this context, infrared thermography is prese ... [+]
Temperature measurement in metal cutting is of central importance as tool wear and surface integrity have been demonstrated to be temperature dependent. In this context, infrared thermography is presented as a reliable technique to determine tool temperatures and thermal fields at near real-time. However, a constraint of this technique is that temperatures are measured on the tool side faces normal to the cutting edge but offset from the tool/chip contact. In the present research, tool/chip contact temperatures were calculated from the tool side based on analytical theories of heating and the principles of heat generation in cutting processes. The required inputs were commonly measurable variables (cutting and feed forces, chip thickness and tool/chip contact length). The proposed approach was combined with a new calibration method in which a calibration curve that directly relates real and radiated temperatures is obtained, instead of measuring the emissivity of the radiating surface.
As a case study, the research was conducted on a set of four ferrite-pearlite steels (16MnCr5, 27MnCr, C45 and C60). The results demonstrated the effectiveness of the method to establish the real influence of the cutting conditions (cutting speed and feed) and to distinguish the effect that different work material microstructures have in tool/chip temperature. Furthermore, the results showed a high degree of accuracy and less than 12% deviation from the trends when compared with 2D cutting simulations. [-]
ID Proyecto
info:eu-repo/grantAgreement/EC/RFCS/RFSR-CT-2014-00020/EU/Innovative Method dedicated to the development of a ferrite-pearlite grade regarding its Machinability/IMMACColecciones
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