Contactless monitoring of temperature change in cutting inserts by application of hard coatings and ferromagnetic film sensor phases
Contactless monitoring of temperature change in cutting inserts by application of hard coatings and ferromagnetic film sensor phases
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DOI：
10.1016/j.sna.2019.07.026
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发表时间：
2019-09
期刊：
影响因子：
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通讯作者：
K. Seemann;S. Beirle;C. Thede;V. Schier;E. Quandt
中科院分区：
文献类型：
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作者：
K. Seemann;S. Beirle;C. Thede;V. Schier;E. Quandt
采用反应射频法制备了铁磁 Fe-Co-Hf-N 纳米复合薄膜。磁控溅射。利用它们的磁致弹性特性来实现一种新的传感器系统，该系统能够监测应力或应力引起的温度，从而控制金属加工过程中切削刀具的磨损过程。铁磁薄膜与耐磨Ti-Al-N和绝缘SiO2（或两者）界面层相结合，以提供耐磨涂层并将铁磁薄膜与WC-Co制成的基底分离。传感是通过测量头进行的，该测量头利用混频技术来监测由于热感应应力而引起的温度变化，该热感应应力由传感层的磁导率的变化表示。磁导率的这种变化导致传感器信号傅立叶变换的频率分量的变化。在车床上进行金属切削过程中，可以观察到磨损和刀具故障，这通过温度的强烈或突然升高来表明。完好无损的切削刀片与其即将发生故障之间的振幅增益差异可表示为超过 100%。
Ferromagnetic Fe-Co-Hf-N nanocomposite films were fabricated by reactive r.f. magnetron sputtering. Their magnetoelastic properties were exploited to realize a new sensor system that is able to monitor stress or stress induced temperature and thereby to control the wear process in cutting tools during metal working. The ferromagnetic films were combined with wear resistant Ti-Al-N and insulating SiO2(or both) interface layers, in order to provide a wear resistant coating and to decouple the ferromagnetic film from the substrate which is made from WC-Co. Sensing was carried out by means of a measuring head which utilizes a frequency mixing technique to monitor the change of temperature due to thermally induced stresses represented by the change of the magnetic permeability of the sensing layer. This change in permeability results in a change of the frequency components of the sensor signal Fourier transformation. During a metal cutting process in a lathe, wear and tool failure was observable which is indicated by a stronger or sudden increase of the temperature. The difference in amplitude gains between intact cutting insert and its imminent failure could be denoted by more than 100%.