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。
The mandrel(including flexible balls) is the key to improving the forming limit and forming precision in thin-walled tube NC bending process.
薄壁管数控弯曲中带芯头的柔性芯模是提高薄壁管件成形极限和成形精度的关键因素。
This series of products processing capacity is very comprehensive and free control can be two-way bending mandrel expansion, upper and lower, therefore can be processed more complex shape.
本系列的产品加工能力非常全面可以双向弯曲以及自由伸缩、上下，因此可以加工更多更复杂的形状。
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