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针对汽车高强钢板结构件的特点和回弹变形规律,提出了一种基于UV(等参)线的几何旋转变形回弹补偿算法.该算法利用UV线对曲面进行离散,通过截面线的旋转变形原理获得离散点的变形量,并以曲面原有UV方向对变形后的离散点进行曲面重构.该算法考虑了冲压方向的回弹补偿修正量,以满足冲压工艺性.介绍了几何旋转变形算法的实现流程,并利用CAA(组件应用架构)技术将算法与CATIA(计算机辅助三维交互应用)平台无缝集成,以获得较高质量的模具几何补偿型面,可以直接用于数控加工.最后以一个典型的高强钢板汽车结构件的几何旋转变形回弹补偿来验证该算法的有效性和可行性.
Aimed at the characteristics of high-strength steel structure parts and the law of springback deformation, a spring-back compensation algorithm based on UV (isoparametric) lines is proposed. The algorithm uses UV rays to discretize the surface, Principle is used to obtain the deformation of discrete points and to reconstruct the discrete points after the deformation with the original UV direction of the curved surface.The algorithm takes into account the correction amount of springback compensation in the direction of stamping to satisfy the stamping process.The geometrical rotational deformation Algorithm implementation process and CAA (Component Application Architecture) technology to seamlessly integrate the algorithm with the CATIA (Computer Aided 3D Interaction) platform to obtain higher quality die geometry compensated profiles that can be used directly in NC machining. The validity and feasibility of the proposed algorithm are verified by a typical springback compensation of high-strength steel automotive structural members.