【摘要】 针对气压砂轮光整加工过程中的振动问题,对气压砂轮抛光工具进行了振动稳动性研究;通过确定抛光工具结合面的等效动力特性参数,建立结合面的动力学模型,进行了有限元模态分析,得出了气压砂轮抛光工具在不同工况下的固有频率,发现抛光工具的主要振动部件为保持架和连接板;在有限元模态分析基础上搭建了模态测试平台,进行了实验模态验证;对比有限元分析结果和实验验证结果,分析了误差产生的原因;根据有限元分析和实验测试结果,对振动部件连接板进行了局部增强,优化了抛光工具结构;研究结果表明优化后的抛光工具能有效提高其振动稳定性,满足光整加工需求。更多还原

【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.更多还原