Non-Contact Temperature Measurement by Infrared Pyrometer in High Speed Milling

A method is described to measure temperature on rake face and flank face during high speed milling through the combination of using a non-contact infrared pyrometer and drilling two holes in the workpiece. One of the holes was vertical to the direction of feed for measuring the temperature of rake face, and the other was parallel to the direction of feed for measuring the temperature of flank face. The holes enabled probe beam of the pyrometer to go through them to reach the tool surface directly. The method avoids drilling any hole in the tool and can be used to measure the interface temperature directly. This technique has potential application in monitoring tool temperature and analyzing tool wear during machining of difficult-to-cut materials.