Flexible stretch-bending of multi-point roller dies technology is a new three-dimensional forming technology for profiles. Compared with the traditional stretch-bending process, the three-dimensional deformation of the profile can be formed at one time, and the cost of the die is greatly reduced and the production efficiency is improved. The die is an important component of flexible stretch-bending of multi-point roller dies equipment. Discrete die is the focus of this paper. The finite element model of flexible stretch-bending of multi-point roller dies is established. Taking T-profile and L-profile as research objects, the effect of die arrangement on strain, shape error, thickness distribution, and springback error is studied. The non-contact area between profile and die is one of the important factors that affect the 3D deformation of profile. By comparing the numerical simulation results with the experimental results, the effect of the non-contact area length on the three-dimensional deformation of profile is analyzed. The results show that with the increase of the non-contact area length, the shape error of profile increases, the thickness of profile web becomes thinner more seriously, and the springback error of profile increases after unloading.

多点辊模具的柔性拉伸弯曲是一种新型的型材三维成型技术。与传统的拉伸弯曲工艺相比，可一次形成型材的三维变形，大大降低了模具成本，提高了生产效率。模具是多点辊式模具设备柔性拉伸弯曲的重要组成部分。离散模具是本文的重点。建立了多点辊道模具柔性弯曲弯曲的有限元模型。以T型和L型为研究对象，研究了模具布置对应变，形状误差，厚度分布和回弹误差的影响。轮廓和模具之间的非接触区域是影响轮廓3D变形的重要因素之一。通过将数值模拟结果与实验结果进行比较，分析了非接触区域长度对型材三维变形的影响。结果表明，随着非接触面积长度的增加，型材的形状误差增大，型材腹板的厚度更加薄，卸载后型材的回弹误差增大。