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为开发可控的电弧功率超声,选取熔化极和非熔化极气体保护电弧作为受激对象,设计了电弧超声激励源,在电弧回路中分别施加高频连续交变信号和敲击式脉冲信号,成功地激发电弧超声发射,实现了使电弧集“产热与声发射”功能于一体的新型控制机理。根据电弧声发射波形分析了受激电弧对激励信号的线性和非线性频率响应特点,为进一步探索频率、幅度等参数实时可控的功率超声柔性控制新方法奠定了基础。
In order to develop a controllable arc power ultrasonic wave, the arc-excited ultrasonic source is designed by selecting the protected arc of the melting electrode and the non-melting gas as the stimulated object. High frequency continuous alternating signal and percussive pulse signal are respectively applied in the arc circuit, Successfully stimulate the arc ultrasonic emission, to achieve the arc set “heat and sound emission” in one of the new control mechanism. The characteristics of linear and nonlinear frequency response of stimulated electric arc to excitation signal are analyzed according to arc emission waveform, which lays the foundation for further exploration of a new method of power ultrasonic flexible control which can control the parameters of frequency and amplitude in real time.