大尺度U形曲面板材工件的成形模拟与实验研究

付泽民，胡大超，刘旭辉

(上海应用技术学院 机械工程学院，上海，201408)

摘 要：为高精度成形超长大开口度U形板材工件，提出一种大幅面板材多道次渐进折弯成形的数值模拟方法。以一大尺度半椭圆形工件成形为例，建立基于ABAQUS/Explicit & Standard 求解分析平台的工件渐进成形有限元模型，模拟该工件多道次的折弯与回弹全过程。研究结果表明：采用折弯模具参数的优化组合及最佳的成形工艺参数可实现工件加工的精确控形。

关键词：大幅面板材成形；渐进折弯；回弹；ABAQUS有限元模型；模拟优化

Forming simulation and experimental study for large U-shaped workpiece of sheet metal

FU Ze-min, HU Da-chao, LIU Xu-hui

(School of Mechanical Engineering, Shanghai Institute of Technology, Shanghai 201408, China)

Abstract:To effectively form U-shaped workpiece with super length and large opening of sheet metal, a numerical simulation method for multiple-step incremental air-bending forming of large area sheet metal was proposed. Through forming a large semiellipse-shaped workpiece, 3D ABAQUS finite-element models (FEM) were established, and the workpiece incremental air-bending and springback processes were simulated by ABAQUS/Explicit & Standard solvers. The results show that the shape of workpiece can be controlled accurately using the optimum tool parameters as well as the optimal process parameters.

Key words:large area sheet metal forming; incremental air-bending; springback; ABAQUS finite-element model; simulation optimization