Research On Monitoring System Of Acoustic Spindle For NOMEX Honeycomb Composite Material Ultrasonic Cutting

Ultrasonic cutting acoustic spindle is the core component of NOMEX honeycomb compositematerial processing. If a failure occurs, not only affects the machining quality and efficiency ofNOMEX honeycomb composite material, but also damage the ultrasonic cutting equipment, andbrings the serious economic loss. Therefore, it is great significance to the study of monitoringsystem of NOMEX honeycomb composite material ultrasonic cutting acoustic spindle.The study of monitoring system of NOMEX honeycomb composite material ultrasonic cuttingacoustic spindle is an effective ways and methods to ensure ultrasonic cutting equipment safety,reliable operation, high efficiency operation and quality processing. At present, the domestic andinternational research on monitoring system of ultrasonic cutting equipment is relativelydecentralized, and has not formed a perfect ultrasonic cutting monitoring system. Especially thedomestic research of ultrasonic cutting monitoring system is also at a disadvantage. To solve thisproblem, in this paper, combined with a company in the failure problem in the working of NOMEXhoneycomb composite material ultrasonic cutting and the working principle of the key componentsof the ultrasonic cutting acoustic spindle, and based on the existing therefore research on, the authoranalyzed the theories of typical and fault feature. Finally the author determined the monitoringsystem of NOMEX honeycomb composite material ultrasonic cutting acoustic spindle, andcompleted a set of perfect prototype.The monitoring system’s function includes: the electrical parameters monitoring (the outputpower，the frequency, the effective value of voltage，the effective value of current，impedance angle)and key point temperatures monitoring (the temperatures of power tube, transducer and node).Through the theoretical study of the typical fault parameters’ monitoring method, the authordetermine to the fault monitoring method for monitoring system, and put forward to a new methodfor the measurement of an ultrasonic transducer impedance angle on the basis of the orthogonalcorrelation. Through the simulation and experiment prove that the method is applicable tosynchronous an non-synchronous sampling of ultrasonic frequency signal, and the amount ofcalculation is small, the real-time is strong, the accuracy of measurement is high, especially theerror of improved close to0.0551degree. And this method is suitable for the problem of highprecision measurement of impedance frequency drift caused by angle, and lay the foundation for therealization of dynamic matching.Developed by the ARM Cortex-M3as the core microprocessor, sensors, conditioning circuit for monitoring system of peripheral equipment. Used the C language to compile the AD program ofthe power, frequency, impedance angle, effective value of voltage, effective value of current, powertube’s temperature, transducer’s temperature and node’s temperature, data processing, alarm andrelay control. With a7inch screen to complete the monitoring parameter data display, the keyparameters of real-time curve display and other functions. The experimental results show that thesampling and measurement accuracy of monitoring system can meet the requirements of enterpriseengineering, complete the online monitoring of NOMEX honeycomb composite material ultrasoniccutting acoustic spindle.In summary, this paper makes a systematic study on the monitoring technology of NOMEXhoneycomb composite material ultrasonic cutting acoustic spindle. On the research of typical fault,monitoring methods, measuring point layout, data processing and the development of monitoringsystem have made certain achievements, and solving the data monitoring dispersion problem, at thesame time, ensuring the safety and reliability of ultrasonic cutting processing, improving themachining efficiency and quality, reducing maintenance and operating costs.