The larger strength coefficient is, the larger springback Angle is.
强度系数越大，回弹角越大。
The springback Angle increases with the increase of the punch round radius and clearances between the punch and the die while decreases...
回弹角随凸模圆角半径和凸凹模间隙的增大而增大，随压边力、板料厚度、摩擦系数和材料硬化指数的增大而减小。
The results show that: the springback Angle of bent tube increases with the bending Angle, the gap between mandrel and tube, and the hardening coefficient, but decreases with the hardenability value.
结果表明：回弹角随弯曲角、芯棒与管壁间隙及材料硬化系数的增大而增大，随材料硬化指数的增大而减小。
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