钛焊管连续辊弯成型工艺研究

A Study on the Continuous Roll Bending Process of Titanium Welded Pipe

研究聚焦于Ф168 mm钛焊管的连续辊弯成型工艺,通过数值仿真和实验验证,深入分析了成型速度和成型间距对成型抗力、应力应变的影响。结果表明,在成型速度≤5 m/min、成型间距缩至700 mm时,钛焊管辊弯成型抗力显著降低,成型应力、应变维持在低水平,实现了成型稳定性的显著改善。此外,针对成型过程中的变形情况进行了详细分析,指出边缘拉压作用易导致失稳,产生边浪、鼓包等缺陷。最后,通过数值模拟和试验对比,验证了数值模型的可行性,为钛焊管实际生产提供了指导。

This study focuses on the continuous roll bending process of theФ168 mm titanium welded pipe.Through numerical simulation and experimental validation,a comprehensive analysis is conducted on the influences of forming speed and inter-stand distance on forming resistance,stress,and strain.The results indicate that at forming speeds≤5 m/min and a reduced inter-stand distance of 700 mm,the forming resistance of the titanium welded pipe significantly decreases,while forming stress and strain are maintained at low levels,leading to a remarkable improvement of the forming stability.Furthermore,a detailed analysis of deformation during the forming process highlights the susceptibility to instability due to the edge tension-compression effect,resulting in defects such as edge waves and bulges.Finally,the feasibility of the numerical model is verified through numerical simulation and experimental comparison,providing guidance for practical production of the titanium welded pipe.