The influences of tube dimension and interface friction on thematerial flow and the cause of forming defect in the flange forming process by upsetting-forging tube are analyzed.

• 通过对圆管镦锻法兰成形过程进行有限元数值模拟，分析了圆管坯料尺寸、摩擦等因素对圆管镦锻法兰成形过程中金属流动的影响及缺陷产生的原因。