Vibration stability of the pneumatic grinding wheel polishing tool

CAI Donghai， JI Shiming， GENG Jian， TU Liqun

(Key Laboratory of E&M., Ministry of Education & Zhejiang Province, Zhejiang University of Technology,Hangzhou 310014, China)

Abstract: Aiming at the vibration problem during the polishing process of pneumatic grinding wheel, the vibration stability of pneumatic grinding wheel polishing tool was studied. By determining the equivalent dynamic characteristic parameters of the joint surface of the polishing tool, the dynamic model was established, and the finite element modal analysis was carried out. The natural frequency of the polishing tool under different conditions was obtained. The main vibration components of the polishing tool were the retainer and the connection plate. On the basis of finite element modal analysis, the modal testing platform was built, and the experimental modal analysis was carried out. Compared with the finite element analysis results and experimental results, the reasons of the error were analyzed. Based on the finite element analysis and the experimental results, the local reinforcement of the connecting plate was carried out, and the structure of the polishing tool was optimized. The results indicate that the optimized polishing tool can effectively improve the vibration stability and meet the needs of finishing process.

Key words: vibration stability; finite element; retainer; connection plate