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 experiment shows that the magnitude of dia. sinking is increased with the increase of reduction and die entry angle;
实验表明，直径缩小量随减径量和模角的增大而增大；
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