基于拓扑优化的TBT深孔钻床主轴箱轻量化设计

Lightweight Design of Spindle Box of TBT Deep Hole Drilling Machine Based on Topology Optimization

以TBT-ML500深孔钻床主轴箱为研究对象,采用有限元分析结合拓扑优化的方法,在ANSYS平台上对其进行了结构轻量化设计。首先,利用Pro/E软件建立主轴箱初始结构的力学模型并基于ANSYS进行静、动态特性分析;在此基础上,利用变密度法对其进行了拓扑优化,优化目标是在保证主轴箱动、静态性能不降低的前提下,减轻主轴箱的质量;根据优化后的结果结合经验设计方法,对原结构进行了重构设计并进行有限元分析验证。结果表明:改进后的主轴箱结构,一阶固有频率提高了7.11%,质量减小了11.1%,实现了轻量化设计,动态性能也有一定的提高,从而为深孔机床其他关键零部件的结构优化提供了参考。

This paper focuses attention on spindle box of deep-hole drilling machine, structural lightweight design of spindle box of TBT-ML500 was performed based on FEA and topology optimization with ANSYS system. First, the original solid model of the spindle box was built by using Pro/E, and static analysis and modal analysis is carried by the platform of ANSYS. On this foundation, the topology optimization was car-ried out by using the theory of variable density, its optimization goal is to reduce the total weight of spindle box with a constraint of meeting the requirements of the dynamic and static performance of the spindle box. Depending on the optimization results and the traditional empirical design method, the model of spindle box was redesigned and verified by the finite element analysis. From the optimization results, the structure of the spindle box by improving, the first-order natural frequency is improved by 2. 18% , the mass is reduced by 3. 86% , the structural lightweight design is realized. The dynamic performance is also improved. It pro-vides reference for optimization design of other critical parts of deep hole drilling machine.