【摘要】 随着切削技术向着高速、高效和干式加工等方向发展,刀具涂层和切削状态监测技术成为影响切削技术发展的主要因素,研究刀具涂层以及刀具磨损引起的切削状态改变对促进制造业发展具有重要意义。利用铣削实验得到了相同切削条件下,不同涂层的3把硬质合金刀具的加工磨损情况。通过分析各个刀具磨损过程中铣削力信号、主轴电流信号以及切削振动信号的变化,得到了无涂层、Ti Al N涂层以及Al Ti N涂层刀具在切削过程中表现出的磨损规律。结果表明:Al Ti N涂层的耐磨性能更好,3把刀具的主轴电流有效值和切削振动信号质心频率的变化均有效反映了刀具磨损情况。在立铣加工过程中,可以将上述两种特征值用于刀具磨损实时在线监测。更多还原

【Abstract】 With the development of high-speed,high-efficiency and dry-type cutting mechanism,tool coating and cutting state monitoring become the main factors having influence on the development of the cutting mechanism. It is of great significance to the study. By the milling experiments,the wear datum of three different coated cemented carbide tools on the same cutting condition are obtained. The change of the cutting force signals,spindle current signals and vibration signals in the process of the tool wear is analyzed and the wear laws of the uncoated,TiAlN coated and Al TiN coated tools are obtained. The results show that the wear resistance of Al TiN coated tool is the best. The change of the spindle current effective value and the gravity frequency of the cutting vibration effectively reflects the tool wear condition,which can be used as the characteristic parameters for real-time online monitoring of the tool wear.更多还原