Papers by Author: Yu Qing Wang

Abstract: Two sets of power ultrasonic transducer applied to ultrasonic machining are designed in this paper, whose surface location, the number of piezoelectric ceramics is identical. By changing the parameters of the quarter wavelength horn which connects with the power ultrasonic transducer, the transducer changes of performance parameters are compared. The influence of the performance of different structural power ultrasonic transducer on its front cover is studied.

Abstract: Relative motion of single abrasive is analyzed for the different applied directions of longitudinal ultrasonic vibration, and its locus is simulated in the present paper. The research results show that the locus in two-dimensional ultrasonic vibration is only similar to that in y-direction, and both are close to sinusoid curves. The width of grooves scratched by abrasive grains y-direction (axial direction of grinding wheel) is two times of the vibration amplitude, and the material removal rate increases remarkably. In case of x-direction (tangential direction of grinding wheel) ultrasonic vibration, abrasive grains with periodic force impact material surface with high frequency vibration, which make material fracture removal easy. Therefore, the high efficiency essence of material removal in two-dimensional ultrasonic grinding is revealed in view of locus. In addition, according to the results of grinding experiments, under same conditions good surface quality can be obtained in two-dimensional ultrasonic grinding and material removal rate in common grinding is the lowest. Consequently it is further proved that the method of two-dimensional ultrasonic vibration grinding is an effective one for ceramic materials.