Y型三通管内高压成形壁厚分布规律

为了解Y型三通管内高压成形时的壁厚分布及成形压力对壁厚的影响规律,通过数值模拟和实验对Y型三通管的内高压成形过程进行了研究,分析了3个不同成形阶段零件的壁厚分布规律和成形过程中零件典型点壁厚随内压的变化规律.研究表明,成形后零件左侧过渡区圆角处壁厚最大,右侧过渡区圆角处次之,枝管顶部壁厚最薄.利用数值模拟,研究了不同终成形压力对零件壁厚分布的影响,研究发现随着终成形压力的提高,零件的最大增厚率变化不明显,但零件的最大减薄率有显著的增加.

Thickness distribution of hydroforming Y-shape branch

To find out the thickness distribution of a hydroformed Y -shaped branch and the influence of calibration pressure on it, an investigation has been conducted for hydroforming Y -shaped branch tubes through numerical simulation and experiments. ThickneSs distribution of three different forming stages and the thickness of typical location varying with the internal pressure in forming process were analyzed. The results showed that after forming, the left fillet transition region was the thickest, the right took the second place, the top of the protrusion was the thinnest. The influence of different calibration pressures on the thickness distribution was studied through numerical simulation. The simulation results indicate that with the increase of calibration pressure, the highest thickening rate does not change obviously, while the highest thinning rate increases apparently.