This article reviews the theory of rotary draw bending, basic tools required and their functions as well as operating sequences of bending.
文章主要介绍旋转拉伸弯管法的原理，所用的基本工具及其功能，弯管的操作步骤等等。
Secondly, compared the effects of different parameters of flange bending hydraulic rubber forming model on hydraulic rubber forming, and draw some conclusions of designing the side blank holder.
其次，比较了凸弯边高压橡皮成形模不同参数的选取对成形的影响，并总结出侧压块的一些设计规律。
5% single pass draught to draw, taking all these measures can get the product with high strength, high toughness and definite bending property.
5%的单道次拉拔，可获得高强度、高韧性且具有一定弯曲性能的产品。
FEM has been used to simulate and analyze the forming process of rotary-draw pipe bending.
利用有限元计算方法对管材弯曲成形过程进行了模拟分析，并与实验结果进行了比较。
FEM has been used to simulate and analyze the forming process of rotary-draw pipe bending.
利用有限元计算方法对管材弯曲成形过程进行了模拟分析，并与实验结果进行了比较。
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