The spinning force will not change obviously if the feed radio is small.
进给比小时，旋压力变化不明显。
The distortion and changing of spinning force in variable stage is analyzed also.
并对强旋过程中各阶段的变形情况和旋压力的变化进行了分析。
The rules which various parameters influence spinning force and equivalent stress are obtained and its provide theoretical evidence for choosing the optimal parameters.
获得了成形角、减薄率、进给比等工艺参数对等效应力、旋压力及内筋成形高度的影响规律，为旋压工艺参数的选择和优化提供了依据。
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