介绍了一种通过成形方式生产钢制管道三通支路的新工艺。提出了翻边前预制孔的形状和尺寸的确定方法和翻边模具的模型;并利用计算机模拟支路翻边过程,通过分析模拟结果,对预制孔的尺寸和形状的有关数据进行适当调整,最终确保翻边支路口部平整、无裂纹。根据模拟结果设计了钢制管道三通支路翻边成形模具。 A new process of producing steel pipe tee branch by forming is introduced. The method of determining the shape and size of the prefabricated hole before burring and the model of burring mold are put forward. The burring process of branch is simulated by computer, and the data of the size and shape of the prefabricated hole are adjusted according to the simulation results. Ultimately ensure that the flanging branch mouth flat, no cracks. According to the simulation results, the steel pipe tee branch flange forming mold was designed.