TEMPERATURE MEASUREMENT IN HIGH SPEED CYLINDRICAL-PLUNGE GRINDING USING THERMOCOUPLE

Temperature measurement is employed for research in grinding and for process monitoring. Because of the difficulty in arrangement of thermocouples, temperature measurement in grinding presents a number of challenges, particularly in high speed cylindrical-plunge grinding. Based on existing literature, only one thermocouple is considered for measuring the maximum temperature in the grinding contact arc, without considering the overall temperature variation. In this paper, a new measurement method, named four K-type thermocouples are proposed aslant along the direction of the width of workpiece which is developed for measuring the overall contact arc in high speed cylindrical-plunge grinding. It is shown that the temperature increases to the maximum with a sharp gradient, then decreases due to the strengthening of cooling effect and the decrease of depth of cut, which is consistent with previous study. The measured temperature signal reveals the generation rule and dissipation rule of grinding heat. The influence of grinding parameters on the temperature is also discussed in detail in the paper.