Wear-compensating machining of nanocrystalline surface layers through spatially resolved measurement of temperature and wear

该研究项目的目的是对能够在AISI 4140上加工定义的纳米晶表面层的车削过程进行控制，并自动补偿磨损。这将通过应用于工具表面的薄膜传感器系统来实现。这些传感器允许对温度和磨损进行空间分辨测量。此外，切割力将使用集成薄膜传感器进行测量。使用过程模型，将建立一个软测量传感器的信号的基础上。这将提供工艺控制变量和热机械负荷与纳米晶表面层及其厚度的相关性。将软测量集成到刀具中，并自适应切削速度和进给量来控制表面层状态。因此，将有可能调整摩擦学行为以及零件的疲劳寿命。

The aim of this research project is qualifying of in-process capable control of turning enabling machining of defined nanocrystalline surface layers on AISI4140, automatically compensating for wear. This will be achieved by thin film sensor systems applied to the tools surface. These sensors permit spatially resolved measurement of temperature and wear. Additionally, the cutting forces will be measured with an integrated thin film sensor. Using a process model, a softsensor will be built based on the signals of the sensors. This will supply correlations of process control variables and the thermo-mechanical loading with the nanocrystalline surface layer and its thickness. Integration of the softsensor in the tool and the adaption of cutting velocity and feed will then be used to control the surface layer state. Therefore, it will be possible to adjust tribological behavior as well as fatigue life of parts.