【摘要】 目的给出车刀在切削过程中破损的声发射源和声发射信号的时域数学模型．方法利用广义虎克定律，建立了车刀刀片裂纹扩展时的声发射能量模型，根据能量守恒原则，利用时频变换理论的帕什瓦定理推导出车刀破损的声发射信号时域数学模型．结果建立了车刀破损的声发射数学模型，阐明了车刀破损时影响声发射信号特性的各种因素及其相互关系．结论为有效地利用声发射方法检测车刀裂纹和断裂提供了可靠的理论基础．更多还原

【Abstract】 Aim\ To set up the mathematical models in time domain for acoustic emission sources and signals of turning tool crack in turning cutting process Methods\ Based on the generalized Hooke′s law conservation, acoustic emission energy model of tool crack extension was set up According to energy conservation principle, by means of Parseval′s theorem the time domain mathematical model of acoustic emission signal in the process of turning tool crack was established Results\ Acoustic emission mathematical model in process of turning tool was given Factors influencing the characteristics of acoustic emission signal in the process of turning tool crack were analyzed and their relations were explained Conclusion\ Reliable theoretical basis is provided for monitoring turning tool crack using acoustic emission measurement technology 更多还原