Estimation of Cutting Temperature in High Speed Machining

Abstract

This paper presents a study of the inverse heat conduction problem for high speed machining. A finite element method with an inverse scheme and an experimental measurement using infrared (IR) pyrometer with fiber optic are applied to predict the tool-chip interface temperature and the total heat dissipating to both tungsten carbide and ceramic inserts. A one-dimensional ellipsoidal mapping model of the cutting temperature distribution is adopted here and the average transient cutting temperature is calculated by the inverse finite element method with measured surface temperatures adjacent to the tool edge. Also the analysis of the errors coming from the sensor location and mapping model is studied. The results show the estimated cutting temperature is well convergent and agrees to other previous investigations. It is found that the thermal conductivity of the tool material has significant effect on the heat dissipation but little effect on the tool-chip interface temperature in high speed machining.

Investigation of heat partition in high speed turning of high strength alloy steel

“…A similar technique was used by Lin et al to measure the tool-chip temperature for carbide and ceramic tools at cutting speed of 600 m/min [7]. The pyrometer was directed to the measuring position by using the laser pilot light.…”

An experimental technique for the measurement of temperature fields for the orthogonal cutting in high speed machining

“…The first use of this technique for determining the temperature distribution at the surface of the tool and workpiece was reported by Schwerd [20] who developed a radiation pyrometer where the radiations were beamed on a thermocouple with an optical condenser. Lin et al [21] presented an experimental measurement using infrared pyrometer with fiber optic. The sensor is put at several locations on the rake face, near the cutting edge to determine the tool chip temperature and the total heat dissipated for tungsten carbide and ceramic inserts and for cutting speeds close to 600 m.min -1 .…”

Effect of tool edge geometry and cutting conditions on experimental and simulated chip morphology in orthogonal hard turning of 100Cr6 steel

“…The papers by Liu et al (2002) and Narutaki and Yamane (1979) are the only references the authors have come across so far where this has been attempted. The technique of using the infrared pyrometer coupled with inverse models for the tool temperature field such as described by Kwon et al (2001) and Lin et al (1992) are probably more promising for PCBN cutting tools, especially for continuous hard turning experiments. The prediction of chip ratio r was also not very accurate, probably because of the inaccuracies in the flow-stress data.…”