基于Abaqus/Explicit平台所建立的封头多道次旋压仿真模型，研究旋压成形过程中初始板坯坯料与旋压成形构件的几何映射关系，提出了基于普旋减薄率和基于剪旋正弦规律的2种变厚度板坯设计方法，以改善旋压成形中的壁厚不均匀现象.结果表明：变厚度板坯能够沿径向合理地预分配材料，明显地改善成形构件壁厚均匀性，其中以剪旋设计的变厚板最优，但是变厚度板坯成形旋压力也较大.利用所提出剪旋正弦规律的变厚度板坯设计方法完成了铝合金球形封头的旋压成形实验，获得了具有较好成形精度的旋压构件.
： Based on numerical simulation model of multi-pass spinning, geometry mapping relationship between the blank and spinning component was studied, and two different design methods of variable thickness blank were proposed to improve forming quality. The results showed that the two kinds of variable thickness blanks which had reasonable material distribution along the radial direction, could obviously improve the wall thickness uniformity of the spinning parts, but the variable thickness blank could also give rise to larger spinning force. By using the design method for variable thickness blank, the spinning forming experiment of aluminum alloy spherical head was completed with the good forming quality.
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