Ultrasonic focusing liquid vibration polishing method based on spherical shell piezoelectric transducer

The invention discloses an ultrasonic focusing liquid vibration polishing method based on a spherical shell piezoelectric transducer. The method comprises the steps that a workpiece to be processed isput in an open container, wherein the open container is filled with a polishing solution; the spherical shell piezoelectric transducer which can be moved to change the position in the horizontal or perpendicular direction is placed above the workpiece to be processed, and soaked in the polishing solution all the time, and the concave side points to the surface, to be processed, of the workpiece to be processed; and an ultrasonic power source is started to generate high-frequency electricity so as to excite the spherical shell piezoelectric transducer to generate ultrasonic vibration, the spherical shell piezoelectric transducer is moved according to a preset processing path and the retention time of focused ultrasonic waves on each processing point, ultrasonic vibration is transmitted bythe polishing solution to be focused on the workpiece to be processed, and the surface of the workpiece to be processed is polished. The ultrasonic focusing liquid vibration polishing method based onthe spherical shell piezoelectric transducer can achieve accurate correction of the surface of the workpiece.