The Effect of Torsional Vibration in Longitudinal–torsional Coupled Ultrasonic Vibration-Assisted Grinding of Silicon Carbide Ceramics

Materials

Honghua Su¹  Jiaqing Gu¹  Jingyuan He¹  Yurong Chen¹  Ning Qian¹  Jiuhua Xu¹  Kai Ding² 

[1] National Key Laboratory of Science and Technology on Helicopter Transmission, College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China;

关键词: ultrasonic;    longitudinal–torsional coupled;    actual amplitude;    grinding force;    surface roughness;   

DOI  :  10.3390/ma14030688

来源: DOAJ

【 摘 要 】

Rotary longitudinal–torsional coupled ultrasonic vibration-assisted grinding (LTUAG) is a new manufacturing method that can improve the grinding ability of silicon carbide ceramics. However, compared with longitudinal ultrasonic vibration-assisted grinding (LUAG), the role of torsional vibration in the grinding process is unclear. In this study, an effective method for measuring longitudinal–torsional coupled ultrasonic vibration amplitude and an experimental setup for measuring actual amplitude during grinding are proposed. The trajectory of the abrasive grains under the same grinding parameters and the same longitudinal amplitude during LTUAG and LUAG are analysed. Ultrasonic amplitude curves under the condition of tool rotation are then measured and analysed. Finally, the effect of torsional vibration on grinding force and surface roughness under the same grinding conditions is explained. Experimental analysis shows that the introduction of torsional vibration has little effect on the trajectory length and does not change the number of interference overlaps between abrasive grain tracks. Torsional vibration will only increase the cutting speed during grinding and reduce the undeformed chip thickness, which will reduce the grinding force and improve the surface roughness of LTUAG.

【 授权许可】

Unknown