Finite Element Analysis of Lathe Bed Based on ANSYS

床身是机床的支承件，其动态特性直接影响车床的加工精度与精度稳定性。文章以CA6140车床为研究对象，采用SolidWorks建立床身三维模型，借助大型有限元软件ANSYS对床身进行模态分析、静态分析和谐波分析。模态分析结果表明床身的上面局部刚度较薄弱；静态分析结果表明3个方向的刚度分布不均匀；谐响应分析结果得到3个方向的共振频率。根据有限元分析结果，对车床床身结构进行优化，确定合理的车床结构。The lathe bed is the supporting part of the machine tool, and its dynamic characteristics directly affect the machining accuracy and precision stability of the lathe. Taking the CA6140 lathe as the research object, SolidWorks is used to establish the three-dimensional model of the bed, and modal analysis, static analysis, and harmonic analysis are carried out on the bed with the help of large-scale finite element software ANSYS. The results of the modal analysis show that the local stiffness of the upper part of the bed is weak; the results of the static analysis show that the stiffness distribution in 3 directions is not uniform; the results of harmonic response analysis get the resonance frequencies in 3 directions. According to the results of finite element analysis, the lathe bed structure is optimized, and a reasonable lathe structure is determined.