Springback compensation method for doubly curved plate in multi-point forming
Springback compensation method for doubly curved plate in multi-point forming
复制标题
双曲板多点成形回弹补偿方法
DOI：
10.1016/j.matdes.2012.12.005
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发表时间：
2013-05
期刊：
影响因子：
--
通讯作者：
Li, Ming-Zhe
中科院分区：
文献类型：
--
作者：
Zhang, Qing-Fang;Cai, Zhong-Yi;Zhang, Yan;Li, Ming-Zhe
提出了一种双曲板回弹补偿修正算法，采用理论分析、数值模拟和成形实验相结合的方法建立。基于弹塑性双轴弯曲模型，得到了回弹补偿后的曲率计算方程。采用插值处理和Bezier曲面混合方法来描述回弹补偿后模具表面的形状。根据模具面形，对多点成形过程进行数值模拟和成形实验。同时，对无回弹修正的多点成形过程进行了对比模拟和实验。仿真和实验结果表明，该补偿方法可以有效控制双曲板多点成形中回弹引起的误差。
An algorithm is proposed for springback compensation and modification for doubly curved plate, and it is established by a combination method of theoretical analysis, numerical simulation and forming experiment. Calculation equation for curvature after springback compensation is obtained based on an elastic-perfectly plastic biaxial bending model. Interpolation processing and Bezier surface blending methods are used to describe the shape of die surface after springback compensation. Based on the shape of die surface, numerical simulations and forming experiments are carried out for multi-point forming process. Simultaneously, Comparative simulations and experiments of multi-point forming process without springback modification are conducted. Simulation and experimental results show that the compensation method may effectively control the errors caused by springback in multi-point forming of doubly curved plate.
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