金刚石拉丝模超声加工自动频率跟踪系统设计

摘要

Based on the ultrasonic processing mechanism of diamond drawing dies ,the necessities of the frequency automatic tracking power supply for ultrasonic processing were studied. And the power supply system of frequency automatic tracking based on the simulation phase-locked loop technique was designed. Through the peripheral hardware circuit ,the difference of voltage-current phase on both ends of the transducer were identifies. The output frequencies of phase-locked loop CD4046 were controlled,which can make the work frequency of the transducer is always same at the resonance frequency points. Under the condition of loading the different length of needle tool ,the piezoelectric impedance analysis tests were carried out on automatic tracking power system. The result shows that the system has good tracking performance.%在分析金刚石拉丝模超声加工原理的基础上，讨论了超声频率自动跟踪的必要性，提出了基于模拟锁相环技术的频率跟踪电源系统的设计。通过外围硬件电路检测辨别换能器两端电压和电流信号的相位差方向，控制CD4046锁相环输出频率的大小，使换能器的工作频率始终在谐振频率点。在加载不同长度工具针负载的情况下，对自动跟踪电源系统进行压电阻抗分析测试，实验结果表明，该系统具有良好的频率跟踪性能。