Development of Remote Diagnosis System of Machine Tool by Utilizing Network

本研究历时2年，开发了机床运动精度诊断系统、机床主轴故障诊断系统和利用网络的机床远程诊断系统三个系统。1.提出了一种机床运动精度诊断系统，提出了一种检测数控机床运动和定位精度的方法，并研制了机床运动精度检测与诊断装置和系统。该装置采用激光干涉仪测量，测量分辨率为1 mm。经验证，该装置具有两个测量轴，可以测量圆周运动和垂直运动等轨迹。机床主轴故障诊断系统将加速度传感器、声发射传感器和温度传感器安装在机床主轴上。通过从传感器信号中提取代表主轴损伤的特征，并将其与损伤特征进行识别，建立了机床主轴损伤诊断系统。一种利用网络的机床远程诊断系统开发了一种数控机床上位机与控制器之间的双向通信系统。使用该系统可以从主机侧通过远程控制来操作机床，并可以从远程位置获取和修改NC参数。另外，安装在机床上的传感器的信号通过网络传输到远程主机。利用该交互通信系统开发了一套机床远程诊断系统。

This study was carried out for 2 years, and three systems : a diagnosis system for motion accuracy of a machine tool, a diagnosis system for the main spindle of a machine tool, and a remote diagnosis system of a machine tool by utilizing a network, have been developed. The results are summarized as follows :1. A diagnosis system for motion accuracy of a machine toolA method to test motion and positioning accuracy of an NC machine tool is proposed and a device and a system to measure and diagnose the accuracy are developed. The device has the measurement resolution of 1 mm by using the laser interferometer. It was confirmed that the device with two measurement axes could measure the locus such as circular motion and perpendicular motion.2. A diagnosis system for the main spindle of a machine toolAn acceleration sensor, an AE sensor, and a thermo-sensor are installed by the main spindle of a machine tool. A system is developed to diagnose the damage of the main spindle of a machine tool by extracting the features representing damage of the main from the sensor signals and identifying the feature with the damage.3. A remote diagnosis system of a machine tool by utilizing a networkThe mutual communication system between a host computer and the controller of an NC machine tool was developed. Using the system enable one to operate a machine tool by remote control from the host computer side and to obtain and modify the NC parameter from a remote place. In addition, signals from the sensor installed in a machine tool are transferred to the remote host computer through the network. A remote diagnosis system of a machine tool was developed by using the mutual communication system.