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本文主要对V型连接管件内径滚压成形三维有限元模拟中的关键问题进行了研究。对实际加工中的模具进行了必要的简化, 建立起符合实际加工过程的有限元仿真模型, 对坯料网格进行合理的划分, 给出模具与坯料间接触区约束及速度边界条件的处理方法。结果表明, 有限元仿真能比较真实地反映实际加工情况; 变形区的速度场反映了金属产生塑性变形填入套管齿槽的成形行为; 得到了齿槽宽度对连接件的成形性及成形载荷的影响。该模拟计算对于探索复杂的内径滚压成形规律具有重要意义。
In this paper, the key issues in the three-dimensional finite element simulation of the inner-diameter roll forming of V-shaped pipe fittings are mainly studied. The molds in the actual machining are simplified as necessary, and the finite element simulation model which accords with the actual machining process is set up. The mesh of the blank is reasonably divided, and the method of dealing with the contact area constraints and speed boundary conditions between mold and blank is given. The results show that the finite element simulation can reflect the actual machining situation more accurately. The velocity field in the deformation zone reflects the forming behavior of the plastic deformation of the metal filled into the casing tooth groove. The formability of the coupling groove and the forming load Impact. The simulation calculation is of great significance for exploring the complicated law of inner diameter roll forming.