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针对钛合金管材很难被矫直的问题,采用压扁加反弯的方法得到很好的矫直效果。设计了实现钛合金管材压扁加反弯矫直的分段等曲率反弯辊型,从弹塑性基本理论出发,推导了矫直过程中考虑材料强化条件下的弯矩公式,并建立了矫直精度的理论计算模型。借助该矫直精度计算模型对反弯量组合进行了优化,针对典型产品的分段等曲率反弯钛合金管材,提出合理的压扁量取值范围,为实际生产中辊缝调节提供参考。
For the titanium alloy pipe is difficult to be straightened, the use of flattening and anti-bending method to get a good straightening effect. A piecewise equal curvature rollback model was developed to realize flattening and bending of titanium alloy tube. Based on the basic theory of elastoplasticity, the formula of bending moment under the condition of material strengthening was deduced, Straight-precision theoretical calculation model. With the help of the straightening precision calculation model, the combination of the anti-bending quantity is optimized. According to the typical products such as the segmented constant curvature reverse bending titanium alloy pipe, a reasonable range of the amount of squashing is proposed, which provides reference for the adjustment of the roll gap in the actual production.