Simulation and experiment on vibrator of ultrasonic grinding ceramic surface tool mark system

LIU Jun1, ZHANG Qing-rong2, LI Feng1, ZHANG Yong-jun2, MA Shi-he2, LIU Gui-xian2
(1.School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China;
2.School of Mechanical and Electrical Engineering, Guangdong University of
Technology, Guangzhou 510006, China)

Abstract: Aiming at the technical problem of the tool marks produced in ordinary mechanical grinding of planar ceramics, a method for ultrasonic-assisted grinding to remove tool marks on the ceramic surface was proposed. The modal simulation of the ultrasonic vibrator was carried out by using COMSOL Multiphysics. The impedance parameters of the ultrasonic vibrator were tested by an impedance analyzer. The amplitude of the end face of the grinding tool head under different electrical parameters and the stability of the same cross section were tested by laser vibrometer. A single factor experimental study was conducted on the ultrasonic surface grinding of ceramics at different processing powers, and the effect of machine power on the surface roughness of ceramics was analyzed .The results show that the vibration mode and amplitude are highly consistent with the simulation, and the performance parameters such as impedance and amplitude are stable.The roughness Sq and surface deviation Ssk of the processed ceramic surface are greatly reduced by grinding test, and the surface finish of ceramics is significantly improved. The method can realize stable and high-precision ceramic surface grinding.
Key words: COMSOL simulation; ultrasonic surface grinding; amplitude; roughness