振动钻削过程中液压颤振器的振动特性分析

Study on Vibration Characteristics of Hydraulic Vibrator During the Process of Vibration Drilling

提出一种液压颤振器,该颤振器可用于振动切削的激振装置,它主要有高频激振阀和单作用颤振缸组成,该颤振器可输出500 Hz的受控振动。采用ANSYS Workbench对颤振器的关键部件弹性端盖进行静态和模态仿真。实验测量了钻孔和不钻孔情况下该颤振器的压力特性、加速度特性和位移特性,并对数据对比分析,结果表明,工件的振动频率能跟随激振阀的激振频率,能量集中在激振频率;该液压颤振器与不钻孔时的振动特性均未发生太大变化,说明该液压颤振器的稳定性是极好的;谐振频率300 Hz,谐振时振幅明显增加。

A new hydraulic vibrator is proposed which is used as vibration device for vibration drilling. It is composed of high frequency excitation valve and a single-acting cylinder. The hydraulic vibrator can output the controlled vibration of 500 Hz. ANSYS Workbench is applied to achieve the static and modal simulation of the vibrator. The data of pressure, acceleration and displacement of the vibrator are measured and compared during the process of both drilling and without drilling. The results show that the vibration frequency of the workpiece can follow the excitation frequency of excitation valve, and energy is concentrated on the excitation frequency. The vibration characteristic between the hydraulic vibrator and not drilling is no big different, which indicates that the stability of the hydraulic vibrator is excellent. In addition, the resonant frequency is 300Hz and amplitude increases significantly when