一种基于改进傅里叶变换的回弹补偿算法研究

Compensation of springback based on improved fast Fourier transform

针对回弹规律比较复杂的冲压件中高精度的要求,提出了一种基于改进傅里叶变换的回弹闭环控制系统模型。首先,从产品模型出发利用有限元分析、成形工艺参数优化等方法进行初始模具设计;然后对模具及冲压产品进行测量,评价回弹误差;最后通过两个迭代循环来基本消除回弹误差,完成最后模具修正补偿。实验证明,利用该模型可以有效地完成对模具形状修正,实现了复杂冲压件的回弹补偿。

Since the high-precision requirements of stamping parts which more complex to the springback, this papers intro- duced a compensation of springback based on improved fast Fourier transform. First of all, starting from the product mould, carried out the initial mould design by means of finite element analysis, optimization of forming process parameters and other methods. Second, measured the mould and evaluated the resilience error. Finally, reduced springback errors through two iteration cycles, and completed mould amendment. The experiments show that the system can completion the amendment of the mold of the shape effectively and realized the springback compensation to the complex stamping.