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目的分析了金属材料间摩擦和磨损声发射信号的产生机理，阐明了描述磨损程度与声发射信号的数学定量关系．方法在描述金属切削过程塑性功的基础上，以正交切削过程为例，论述了３个变形区的塑性功功率理论表达式，并将车削过程的声发射机理和塑性功率结合起来．结果给出了车削过程中声发射信号的能量指标与外界加工条件之间关系的数学模型．结论此数学模型为正确识别车削过程中刀具的切削状态奠定了理论基础．
OBJECTIVE: To analyze the generation mechanism of acoustic emission signals of friction and wear between metallic materials and to elucidate the mathematical quantitative relationship between the degree of abrasion and acoustic emission signals. Based on the description of the plastic work in the metal cutting process and the orthogonal cutting process as an example, the theoretical expression of the plastic work power in the three deformation zones is discussed. The acoustic emission mechanism and the plastic power in the turning process are combined. Results The mathematical model of the relationship between the energy index of acoustic emission signal and the external machining conditions during turning was given. Conclusion This mathematical model has laid a theoretical foundation for correctly identifying the cutting status of the tool during turning.