【摘要】 床身作为实木异形零件加工中心的核心承载部件，其结构性能对异形零件加工精度与加工稳定性具有决定性影响，尤其针对复杂曲面加工。以四川省青城机械有限公司生产的MDH8511型木工五轴联动加工中心床身为研究对象，基于SolidWorks构建三维实体模型，通过SolidWorks Simulation开展有限元分析。静态分析中，针对异形零件加工的均匀载荷工况，模拟工作与吊装状态，获取应力及位移分布规律；动态分析结合异形零件切削力高频波动特性，以固有频率为关键指标，求解前六阶固有频率及振型特征。研究结果表明：该床身静态强度与刚度满足实木异形零件加工要求，但中间减重腔及筋板连接区域为动态刚度薄弱环节，易影响异形曲面加工精度。为床身结构优化设计提供理论依据与技术支撑，对提升实木异形零件加工中心性能具有重要意义。更多还原

【Abstract】 As the core load-bearing component of a solid wood special-shaped part machining center, the structural performance of the bed has a decisive impact on the machining accuracy and stability of special-shaped parts, especially for complex curved surface machining. This paper takes the bed of the MDH8511 woodworking five-axis linkage machining center produced by Sichuan Qingcheng Machinery Co.,Ltd. as the research object. A 3D solid model is constructed based on SolidWorks,and finite element analysis is carried out using SolidWorks Simulation. In the static analysis,aiming at the uniform load condition of special-shaped part machining,the working and hoisting states are simulated to obtain the stress and displacement distribution laws. Combined with the high-frequency fluctuation characteristics of cutting force for special-shaped parts,the dynamic analysis takes natural frequency as a key index to solve the first six orders of natural frequencies and modal characteristics. The research results show that the static strength and stiffness of the bed meet the machining requirements of solid wood special-shaped parts,but the middle weight-reducing cavity and the rib plate connection area are weak links in dynamic stiffness,which may easily affect the machining accuracy of special-shaped curved surfaces. This study provides a theoretical basis and technical support for the optimal design of the bed structure and is of great significance for improving the performance of solid wood special-shaped part machining centers.更多还原