基于抛物线法的迭代补偿算法

Parabola based iterative compensation algorithm for age forming of integral panel of aluminum alloy

针对DA补偿法中补偿系数不易事先确定,提出一种基于抛物线法的迭代补偿算法,并详细阐述了该方法的原理与补偿公式。通过ABAQUS有限元仿真软件分别对T型梁和壁板进行补偿验证,使用该文提出的补偿算法仅需进行2－3次补偿,即可满足零件设计要求。将该文方法用于实验“双十字”件中,经过1次补偿迭代后,理论零件型面与补偿后零件型面最大偏差为0.286mm,满足工程应用要求。抛物线法的迭代补偿算法适用于带筋壁板时效成形模具型面补偿,且其补偿速度较快。

As for the fact that the compensation coefficient in DA compensation method is not easy to be determined in advance , this paper proposes an iterative compensation algorithm based on the parabola method and elaborates the principle and compensa‐tion formula of this method .Through the compensation verification of T‐beam and panel by ABAQUS finite element simulation software ,this paper draws the fact that the design requirements of parts can be met within 2-3 times compensation .The method is applied in the compensation of“double cross”parts ,and the maximum deviation between the theory surface and the part surface is the 0.286mm after one time iterative compensation ,satisfying the requirement of engineering application .The parabola based iterative compensation algorithm is applicable to mold surface compensation of panels with ribs in age forming and the compensa‐tion rate is faster .