Φ3～Φ5 mm薄壁细管的矫直工艺参数

Process parameters of straightening for Φ3 ～ Φ5 mm thin-walled tubes

斜辊矫直作为管材生产的最后一道工序,为达到薄壁细管严苛的精度要求,最优矫直工艺参数的设定至关重要。为解决薄壁细管矫直的难点,以现有的十辊矫直机为基础,设计了十辊薄壁细管矫直的模型,并进行了工艺参数研究。利用有限元软件ABAQUS建立了薄壁细管材矫直的有限元模型,通过分析不同条件下矫直后管材的X、Y方向的直线偏差、径向偏差得出了适合薄壁细管的最佳压弯量及压扁量,以此拟合出公式。根据公式计算了两组不同情况下管材的工艺参数,通过仿真模拟及实验验证了公式的可靠性,为薄壁细管精密矫直机的开发制造提供了理论依据。

Cross roll straightening is the final step in the production of steel pipes. To meet the stringent requirement on the quality of thin-walled tubes, optimal setting of process parameters is critical. In order to conquer the difficulties in straightening process, a model was established for a 10 -roll straightening machine, and the process parameters were studied. Therefore, a 10 -roll straightening model of thin-walled tube was established by finite element software ABAQUS, and the optimal bending and compressed values were obtained by analyzing the X, Y direction linear deviations and radial deviations of the tube under different conditions. Finally, a formula was fitted based on the optimal process parameters. Process parameters of tubes under two different conditions were calculated according to the for- mula, and then the reliability of the formula was verified through simulation and experiments, which lay a theoretical foundation of the manufacture of thin-walled tube fine straightening machine.