拉床主溜板轻量化高刚度优化设计

Lightweight optimization design of broaching machine tool slide with high stiffness

为实现机床机构的轻量化高刚度设计,以Altair公司的HyperWorkS系列软件为分析平台,对某大型拉床主溜板结构进行优化设计。首先利用前处理软件对拉床主溜板进行几何处理和网格划分;接着分析主溜板工作的边界条件和载荷-隋况,开展静力学和模态的基础仿真分析。然后,以体积比、最大变形量和一阶模态为约束条件,以质量最小化为优化目标,利用optiStruct求解器开展拓扑结构优化。根据优化结果提出拉床主溜板优化设计方案。结果表明:优化设计后的主溜板在满足最大变形约束要求的情况下,第一阶自然频率提高31.2%,材料节省7.8%。

To achieve the lightweight and high rigidity of the machine tool structure,a broaching machine tool slide is optimized based on Altair's HyperWorks.Geometry.cleaning and mesh are firstly processed with the help of finite element analysis software HyperMesh.Then,boundary conditions and load conditions of the slide at work are analyzed,static analysis and normal modes analysis are also carried out.After taking the volume fraction,central displacement of working table and first-order modal frequency as optimization constraint,as well as taking the minimum mass as optimization objective,a topology optimization of the broaching machine tool slide is carried out with the help of OptiStruct solver.Optimized design scheme of the broaching machine tool slide is given based on the result of topology optimization.Comparison result shows that the optimized broaching machine tool slide has 31.2% more first-order natural frequency,and consumes 7.8% less weight,as well as has same central displacement of working table.