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难加工材料切削刀具磨损的热力学特征研究作者:邵芳毕业学校:山东大学指导教师:刘战强高速切削时刀具的失效机理和工件材料的塑性变形规律是目前高速切削领域研究的热点重要课题之一,热力学理论和方法是研究高速切削过程热力学体系诸多现象和本质的强有力工具。本文针对难加工材料钛合金和高温合金材料,用热力学理论和方法建立高速切削过程的热力学体系,从热力学的角度研究高速切削刀具的磨损机理,建立工件材料的热力学本构方程,提出高速切削时剪切变形区和刀屑接触区的熵产生模型,并用试验验证了模型的正确性。
Difficult to machine materials cutting tool wear thermodynamic characteristics of the study authors: Shao Fang Schools: Instructor Shandong University: Liu Zhanqiang high-speed cutting failure mechanism and plastic deformation law tool workpiece material is one of the hot important research of high-speed cutting areas at present, Thermodynamics theory and method are powerful tools to study many phenomena and essences of thermodynamic system in high-speed cutting process. In this paper, the thermodynamic system of high-speed cutting process is established based on the theory and method of thermodynamics for hard alloyed titanium alloy and superalloy. The wear mechanism of high-speed cutting tool is studied from the thermodynamic point of view, and the thermodynamic constitutive equation of the workpiece material is established. The model of entropy generation in shear deformation zone and razor blade contact zone was verified. The correctness of the model was verified by experiments.