超声辅助微细磨料水射流加工装置的研制及实验研究

为了提高磨料水射流的加工性能,设计了超声辅助微细磨料水射流加工系统,磨料供给采用前混合方式。超声喷嘴装置是该系统的关键,并研究了其加工机理,利用超声振动产生具有空化效应的脉冲水射流,通过脉冲射流的高强度动压力作用和空化作用以提高磨料水射流的加工能力。变幅杆是超声装置的核心部件,通过有限元分析验证变幅杆的性能,确保变幅杆能够有效且准确地工作。冲蚀实验证明:超声振动作用可以提高冲击力及材料去除率。然而,随着振幅的增加,表面质量下降。

Development and experimental investigation of ultrasonic assisted micro abrasive waterjet machining device

With an aim to enhance the ability of the abrasive waterjet machining, the ultrasonic assisted micro abrasive waterjet machining system was designed. The pre-mixed device was used as the abrasive supply device. The ultrasonic nozzle device is the key to the system. The processing mechanism was studied. Pulsed waterjet with cavitation effect was generated with the ultrasonic vibration. The ability of the abrasive waterjet was enhanced with the effect of high dynamic pressure of pulsed jet and cavitation. The horn is the core component of ultrasonic device. The performance of the horn was verified by finite element analysis to ensure that the horn works effectively and accurately. The erosion experiments prove that the effect of ultrasonic vibration can improve the impact force and the material removal rate. However, with the increase of the amplitude, the surface quality decreases.