Numerical and experimental simulation for heat flux and cutting temperature estimation using three-dimensional inverse heat conduction technique^*

Abstract

In this work the heat flux generated in a cutting process is simulated using the inverse heat conduction technique based on conjugate gradient method with adjoint equation. A three-dimensional formulation is used both to describe the physical phenomenon and to solve the inverse problem. The machining process (turning) is simulated and instrumented with nine thermocouples at the bottom face of the tool, opposite to its main rake face. The signals are automatically received and processed using a data acquisition system and a PC-Pentium. The direct solution, adjoint equation and sensitivity problem are numerically solved using finite volumes method. With this technique the cutting temperatures are estimated for various simulated cutting conditions. In order to validate the method the IHCP is applied in a well-controlled experiment where the heat flux input is known. An uncertainty analysis is also presented.

Experimental study of an oxygen plasma cutting torch: II. Arc–material interaction, energy transfer and anode attachment

“…These authors also quantified heat fluxes in the workpiece considering the waterjet as a single vertical line of heat sources. Finally, Gonc ¸alves et al [9] and Lima et al [10], for welding and cutting applications, respectively, have measured temperature with thermocouples fixed under the workpiece to evaluate heat fluxes using inverse techniques. It is also necessary to point out the work of Ramakrishnan et al [11].…”

Modélisation du comportement thermique d'un outil de fraisage : approche par identification de système non entier

“…A titre d'exemple en tournage, Groover et Kane [2] disposent deux thermocouples sous la plaquette et établissent un modèle liant la température moyenne sur l'arête de coupe à la température des deux thermocouples à partir d'une méthode nodale. Une démarche comparable, proposée par Lima et al [3] et Chen et al [4], utilise le modèle obtenu par discrétisation spatiale des équations aux dérivées partielles descriptives du phénomène de conduction de la chaleur dans l'outil à partir de la méthode des volumes finis ou des éléments frontières.…”