针对盒形件拉深成形时法兰变形区的变形进行了材料塑性流动的理论分析，提出了位移速度差诱发剪应力的观点。
In of displacement induces shear stress. Shear deformation this paper, flow law of material is theoretically analysed based on deformation of the flange deformed area in box drawing.
然后引进差补方法计算物料平均轴向位移和平均停留时间 ，并分析了物料充满角对轴向位移速度的影响。
Then the mean distance and the mean time of material flow were calculated by means of filling method, the influence of the filling angle of particle on the axial transport velocity was analyzed.
然后引进差补方法计算物料平均轴向位移和平均停留时间 ，并分析了物料充满角对轴向位移速度的影响。
Then the mean distance and the mean time of material flow were calculated by means of filling method, the influence of the filling angle of particle on the axial transport velocity was analyzed.
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