四磨头磨簧机模态分析及优化设计

Modal analysis and design optimizationon of spring end grinder with four wheels

针对磨簧机在加工过程中存在的颤动问题,采用有限元数值模拟分析方法,研究了四磨头磨簧机的动态特性。利用Solidworks三维软件对磨簧机进行了实体建模,运用有限元分析软件ANSYS Workbench对简化模型进行了模态分析,得到了各阶模态的固有振型和固有频率,并对磨簧机机床结构的薄弱环节进行了结构上的优化和改进。研究结果表明,通过对床身的改进,其动态特性的改善有利于提高整机的低阶固有频率;床身的第一阶固有频率提高了57.2%,改进后的整机第一阶模态固有频率提高了103%,并且远离电机的激振频率,能够防止加工过程中共振现象的发生。

Aiming at the vibration of spring end grinder process, the finite element numerical simulation analysis method was used to study the dynamic characteristics of the spring end grinder with four wheel. Solidworks 3D software was used to create solid model of spring end grinder, the finite element analysis software ANSYS Workbench was applied to conduct modal analysis of the simplified model, then the inherent vibration mode and natural frequency of the each mode state were obtained. Structural weaknesses of the machine structure of spring end grinder were optimized and improved. The results indicate that the improvement of the dynamic characteristics through the improvement of the bed is conducive to improve the machine＇s lower order natural frequency. The first order natural frequency of the bed is increased by 57.2%, the first order modal natural frequency of the whole improved machine is increased by 103%, which stays away from the motor vibration frequency to prevent the occurrence of resonance.