Abstract
Liquid nitrogen cryogenic cooling technology has great advantages in cutting machining. A thermodynamic finite element model of liquid nitrogen cryogenic cooling based on the plane strain assumption is established to observe the changes in cutting force and tool temperature corresponding to different cutting parameters (feed rate and cutting speed) under liquid nitrogen cryogenic cooling conditions. Existing tests verified the accuracy of the simulation model, and the prediction error of the simulation model was controlled within 10%. Analyzing the data obtained from the simulation model, it is found that a lower tool temperature is obtained when the cutting parameters are selected to be lower values; under the conditions of liquid nitrogen cryogenic cooling and dry cutting machining, the effect of the cutting speed on the cutting force is not obvious, while the effect of the feed volume on the cutting force is more significant; under the conditions of different cutting parameters, the tool temperature as well as the cutting force are lower under the conditions of liquid nitrogen cryogenic cooling compared to the dry cutting machining method.
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