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为了预测超细晶陶瓷刀具的寿命,在建立Archard磨损模型和切削有限元模型、摩擦模型的基础上,进行了宏观尺度的模拟仿真和试验。主切削力、刀屑间压力随进给量增大而增大,刀屑之间温度、滑动速度随进给量增大先增大再降低。切削深度对刀屑之间的滑动速度和压力影响较小,但对刀/屑间的温度和主切削力影响较大。根据宏观尺度的超细晶陶瓷切削过程数值模拟的数据结果分析和统计、多元线性拟合、泰勒寿命公式得到超细晶陶瓷刀具的寿命预测模型,进行了超细晶陶瓷刀具切削实验验证,该模型的建立为超细晶陶瓷刀具的实际应用打下理论基础。
In order to predict the life of ultrafine-grained ceramic tool, macro-scale simulation and experiment were carried out on the basis of establishing Archard wear model, cutting finite element model and friction model. The main cutting force, the pressure between the cutters increases with the increase of feed rate, the temperature between the cutters, sliding speed increases with the feed rate increases and then decreases. The depth of cut has little effect on the slippage speed and pressure between the chips, but the temperature and the main cutting force have a great influence on the cutter / chip. The life prediction model of ultrafine-grained ceramic tool was obtained according to the data analysis and statistics of multi-crystalline ceramic cutting process at macroscale, the multivariate linear fitting and Taylor’s life formula, and the ultrafine-grained ceramic cutting tool was verified by experiments The establishment of the model laid the theoretical foundation for the practical application of ultrafine-grained ceramic tool.