关键词: 模型设计, 几何离散, 回弹预测, 回弹补偿, 型材零件, 工艺模型

Abstract: To realize high effective and precise manufacturing of complex profile parts,a design method for processing model with variable curvature contour and variable section profile part was proposed.The design model without joggle was set as the initial model to select one contour curve of the profile shape to discrete equidistantly and fit with several arcs.Numerical simulation was used to calculate springback data of the contour curve.To determine arcs of the contour curve after springback,an integrated interface was established to read the simulation result of the springback data.The arc radius difference was used to compensate the springback,and the first-order continuous compensated contour curve  was fitted with the arcs after compensation.The normal section-curves which laid on the isometric discrete points of the initial model contour curve was translated to the corresponding points after compensation,and the reference surface of the model for processing was reconstructed with multi-section surface.Joggle structure was added to create final processing model based on the design model.The design tool of profile part model for processing was developed based on CATIA by the method mentioned above.The analysis of test results showed that the complex profile part model for processing could be built fast and accurately,the forming accuracy was improved significantly after "one-step" forming based on the model,and the manual shape correction work was reduced greatly.

Key words: model design, discrete geometry, springback prediction, springback compensation, profile part, processing model