Abstract:
In the experiment of deep holes drilling with ultrasonic aided electrical discharge machining(UEDM),it is found that with the increase of electrode wear, the vibration amplitude of electrode decreased. It is due to the resonance frequency variation of vibration system when electrode length decreases. To keep the stability of vibration, it is necessary to study the effect of electrode length on the resonance frequency of vibration system.The effect of length change of electrodes on the resonance frequency is elaborately analyzed based on a mechanical model of vibration system. A calculation method for determining the practicable shortest electrode length is proposed. The study results show that, as well as the local resonance of electrode, the local resonance of drive system of transducer is found, when electrode length is close to the shortest length, local resonance frequency of an electrode is close to that of a driving system, and the deviation between the resonance frequency of an electrode and actual resonance frequency of vibration system increases.
