基于拓扑优化的薄壁零件装夹布局确定方法

在复杂薄壁件加工过程中,合理的定位点配置可以有效降低加工变形。为了解决薄壁件定位支撑结构的优化设计问题,文章建立了以刚度为目标函数,体积为约束函数的拓扑优化模型。模型将夹具与工件看作同一实体,采取多组件多约束的拓扑优化方法,利用大型商用软件Ansys Work-bench中的拓扑优化设计模块对零件的定位支撑结构进行拓扑优化设计,并对不同支撑条件的变形仿真结果进行了比较,证明了拓扑优化方法在夹具设计中应用的可行性。

Topological Optimization Based Thin-walled Fixture Layout Design

In the process of complex thin-walled parts,proper locating point configuration can reduce the distortion.In order to solve the positioning problem of the support structure for the thin-walled parts’ optimization design,the article established a topology optimization model that takes stiffness as the objective function,and volume as the constraints function.In the model the fixture and the workpiece are taken as an entity,the multi-component and multi-constrained topology optimization method is used using the shape optimization module in the commercial FEM software Ansys Workbench to topologically optimize the support structure.In addition compared the simulation deformation result with different supporting conditions and proved the feasibility of applying topological optimization into fixture design.