双半径成型时变形量分配对带坯边缘伸长的影响

Influence of Deformation Distribution of Double Radius Forming on Elongation of Edge of Banded Tube stock

双半径成型时，焊管坯中心采用变形量平均分配法会使相邻机架间的带坯边缘伸长量不等，并有可能在前几架产生边缘塑性伸长。经研究发现，变形量非平均分配法对均匀机架间的边缘伸长，提高成型质量有明显的优点。

When double radius forming,elongation of edge of tube skelp between adjacent stands is unegual and it is possible that plastic elongation of edge occurs in the preceding stands owing to the adoption of the average de formation digtribution method.The study has found that the non-average distribution of deformation is of great advantage to averaging the edge elongation between stands and improving the forming guality.