A new calculation of the whole manufacture of the screw blade blanks and a new rotating die set were proposed. 提出了一种新的螺旋叶片坯料的整体下料计算法和一种新的可旋转模具。
The helical vane is analyzed.The helical vanes are welded together and added the external force to be cold-drawing formation. 对螺旋叶片进行了分析，把螺旋叶片焊接组合起来，旋加外力，冷拉成型。
