E19 工作機械熱源熱量を高精度に推定するための温度センサ配置方法(OS1 最新工作機械(4))

Abstract

An increase in frictional heat due to increases in rotational speed and feed rate causes the thermal deformation of machine tools, resulting in a decrease in machining accuracy. To establish a method for reducing the thermally induced machining errors of machine tools, recently the authors have proposed a method to estimate the heat flux acting upon a machine tool body by solving inverse problems. By using the quasi-steady state temperature rises of the body, the heat flux at the heat source was estimated with sufficient accuracy for practical use. To improve the estimation accuracy of the heat flux, the effects of both the number of temperature measurement points and their positions on the accuracy were examined with the orthogonal arrangement of the temperature evaluation points. S/N ratios and factorial effects at each temperature measurement points were evaluated by the optimum solutions of heat flux estimations. These values are useful for an index in determining a layout of temperature sensors to estimate the heat values at heat sources.