钛合金管材二辊矫直机辊型曲线与矫直精度分析

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。

Roller Shape Curve and Straightening Precision of Two-Roller Straightening Machine for Titanium Alloy Tubes

Because the strength and stiffness of titanium alloy pipe are very high, it is difficult to be straightened. Considering the strengthening of material, the formula of bending moment in the process of pipe straightening was deduced. With the basic principle of straightening, the theoretical calculation model of straightening precision was deduced. With the help of the straightening precision calculation model, the amount of bending combination was optimized. The segmentation curvature straightening roller shape for titanium alloy tubes have been designed using the optimized combination of inflection. The reasonable value scope is presented after comprehensive analysis. It can provide reference for roll gap adjustment in practical production