多道次立 平辊轧制立辊孔型对轧件头尾形状影响的有限元分析

 利用显式动力学有限元方法和几何模型更新方法模拟了不同立辊孔型下多道次立 平辊轧制过程，对轧后各道次的轧件头尾形状进行了分析。结果表明：采用平立辊轧制时，轧件影响深度比采用孔型立辊时小，且轧件尾部出现尖角，而采用孔型立辊时未出现；采用孔型辊时，孔型立辊底部导角大小对轧件头尾形状影响较小，且轧件伸长率比采用平立辊时大。同时，平立辊轧制过程头尾情况与用铅实验值吻合较好，说明了本次分析的正确性。

FEM Analysis of Influence of Vertical Roll Shape on Head and Tail Shape of Rolled Piece During Multipass V-H Rolling Process

The multipass V-H rolling process with different vertical roll shape was simutated by explicit dynamic FEM and updating geometric method, and the head and tail shape of rolled piece for different pass and vertical roll shape was analyzed. The results show that when using flat vertical roll, the wedge angle appears in tail, but it does not appear when using shape vertical roll, and the length of rolled piece is shorter than that using shape vertical roll, so its elongation is larger; when using shape vertical roll, the head and tail shape of rolled piece ehangs little as the groove fillet radius of roll changes. At the same time, the calculated head and tail shape of rolled piece for flat vertical roll in different pass is consistent with the measured one when the model material is lead.