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矫直是在管件加工和修复过程中使其能够符合直线度要求的一个重要步骤,研究管件的变形过程可以为矫直行程的确定提供参考。通过对管件矫直过程中3个阶段的弹塑性解析,得到管件在矫直过程中压力和挠度的关系。提出了相对压力和相对挠度的概念,得出了其关系只与管径比有关的结论。并且求出了对于不同管径比的相对压力-相对挠度曲线,提出了根据相对挠度确定下压行程的方法。最后,用无缝钢管进行矫直实验验证了这一结论,验证了理论推导的合理性并分析了误差来源。
Straightening is an important step that makes it meet the requirements of straightness during the machining and repairing process of pipe. The study of the deformation process of the pipe can provide a reference for the determination of straightening process. Through the analysis of the three stages of the tube during the straightening process, the relationship between the pressure and the deflection of the tube during the straightening process is obtained. Proposed the concept of relative pressure and relative deflection, and concluded that the relationship between only the diameter and diameter of the conclusions. The relative pressure-relative deflection curve of different diameter-diameter ratio was obtained, and the method of determining the pressure stroke according to the relative deflection was proposed. Finally, this conclusion is verified by the straightening experiment of seamless steel pipe, which verifies the rationality of theoretical derivation and analyzes the source of error.