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筒形件强力旋压是公认的制造大型薄壁筒形件的有效方法之一,目前已广泛应用于实际生产中.强力旋压技术由于其自身工艺的复杂性,给理论上的精确分析带来诸多不便.近年来,塑性有限元技术的迅速发展给旋压变形的理论分析带来新的活力.旋压工艺本身具有局部加载和局部塑性变形的变形特性,其变形过程中加载位置与方向、约束条件等都在不断变化之中,有限元法对处理此类问题有独特的优点.本文用自行开发的筒形件强力旋压三维大变形弹塑性有限元模拟软件3D-BSPIN,首次采用局部加载理论和动态边界条件对反旋过程中的瞬时位移场,进行了模拟计算,获得了旋压过程中不同截面上的位移分布.这不仅丰富了旋压变形理论,也为实际生产中控制旋压件精度及提高产品合格率提供了理论上的依据.1 有限元模拟中工艺参数的选择
The powerful spinning of cylindrical parts is recognized as one of the effective methods for manufacturing large-sized thin-walled cylindrical parts, and has been widely used in actual production nowadays.The strong spinning technology, due to the complexity of its own technology, In recent years, the rapid development of plastic finite element technology brings new vitality to the theoretical analysis of the spinning deformation.The spinning process itself has the deformation characteristics of local loading and local plastic deformation, the loading position and direction of the deformation process , The constraints and so on are all constantly changing, and the finite element method has unique advantages in dealing with such problems.This paper uses the 3D-BSPIN, a three-dimensional large deformation elasto-plastic finite element simulation software developed by ourselves, Local loading theory and dynamic boundary conditions are used to simulate the instantaneous displacement field in the anti-spin process and get the displacement distribution in different cross-sections during the spinning process. This not only enriches the theory of spinning deformation but also provides a theoretical basis for actual production control Spinning parts accuracy and improve product qualification rate provided a theoretical basis.1 The choice of process parameters in finite element simulation