一种单压电叠堆驱动的回转冲击超声波钻

To improve the chip removal efficiency of percussive ultrasonic drilling, a rotary-percussive ultrasonic drill (RPUD) is proposed based on piezoelectric driving principle, which is driven by single piezoelectric stack. The proposed RPUD uses the vibration on both sides of the single piezoelectric stack to realize the rotary-percussive motion of the drilling tool, and transfers one side of vibration into rotary motion and the other side into percussive motion. Rotary motion and percussive motion can be regulated independently. To realize the synchronous resonance of rotary motion and percussive motion, the modal analysis and transient analysis of ultrasonic drilling transducer are carried out by the finite element method. A prototype of rotary-percussive ultrasonic drilling machine was developed, and the drilling experiment was carried out based on the optimized structural design parameters. The experimental results verify the drilling function of the RPUD, and response surface method is used to analyze the influence of the drilling parameters such as weight on bit on the drilling efficiency.