碳钢/不锈钢双金属复合三通液压胀形数值模拟及试验

Numerical simulation and experimental study on hydroforming of carbon steel/stainless steel clad tube tee

为研究液压胀形工艺过程中碳钢/不锈钢双金属复合三通的成形性能,利用有限元模拟软件对碳钢/不锈钢双金属复合三通的液压胀形工艺进行优化计算,分析主要工艺参数对液压胀形支管高度与壁厚均匀性的影响;根据工艺参数模拟计算的结果,对碳钢/不锈钢双金属复合三通进行了实际冷成形试验。结果表明,内压力越大、摩擦系数越小,支管高度越高;摩擦系数越小、轴向进给速度越小,壁厚均匀性越好。实际冷成形试验结果与有限元模拟结果基本吻合。

The hydroforming of carbon steel/stainless steel clad tube tee was simulated by the general finite element software to explore the formability of the composite tube in hydroforming and to provide guidance for practical operation . The effects of main processing parameters on the protrusion height and the thickness uniformity were investigated . Based on the simulation , the practical forming was performed and the carbon steel/stainless steel clad tube tee was fabricated successfully . The results showed that the protrusion height increased as the internal pressure rose and the friction coefficient declined . The thickness uniformity was improved with the decrease in friction coefficient and the axial feed rate . It was indicated that the experimental results were approximately accordant with the simulative ones .