Thermal Behaviour of Cutting Grain in Grinding

Abstract Temperature at the interface between the cutting grain and a workpiece is measured using a two-color pyrometer with a fused fiber coupler. For the cutting grain, a conical tool of translucent alumina is used. The infrared rays radiated from the interface and transmitted through the conical tool are accepted by a fused fiber coupler and led to two infrared detectors of different spectral sensitivity. The temperature increases rapidly and reaches a saturated value after a short time (about 0.1 ms). The saturated temperature measured increases with the increase in the cutting speed up to the melting point of the work material.