Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
REAL-TIME HEAT FLUX ESTIMATION IN TURNING PROCESS USING INVERSE PROBLEM TECHNIQUE AND INFRARED THERMOGRAPHY
Submission Author:
Sandro Metrevelle Marcondes de Lima e Silva , MG , Brazil
Co-Authors:
Fernando Viana Avelar Dutra, Diego Ferreira, Rodrigo Gustavo Dourado da Silva, Sandro Metrevelle Marcondes de Lima e Silva
Presenter: Fernando Viana Avelar Dutra
doi://10.26678/ABCM.ENCIT2022.CIT22-0056
Abstract
The turning process is widely used in industry. Depending on the workpiece application some turning processes require tighter tolerances. These tolerances can be compromised by a considerable number of variables. The heat aspects are focused in this paper. Heat is generated on the tool-chip contact principally due to shear and frictional forces. This heat results in a large increase in temperature, which change properties of cutting tool and workpiece. Depending on the set-up of the process, the developed temperature could quickly lead to the breakage of the cutting tool. A program was developed for monitoring purpose. The program was able to estimate the heat flux and the hot spot temperature in real-time. It consists of solving an Inverse Heat Conduction Problem (IHCP) applying a filter coefficients technique. The function specification technique was used for the estimation of the filter coefficients. An infrared camera was used to measure the temperatures in accessible areas on the surface of a cutting tool. It was estimated a heat flux in the order of 1.4 × 107 W/m2 and a hot spot temperature reaching approximately 700 °C. This study is useful to support the development of practical tool wear monitoring systems and helps to exemplify the benefits of heat and temperature estimations.
Keywords
Inverse problem, Heat flux, turning process, Infrared thermography, Real Time Estimation
