摘要
为了改进现有的螺旋埋弧焊管机组在超大直径钢管生产中成型质量不稳定的现状,对外涨式成型器的工作原理和成型难点进行了分析,并通过优化调整K值,强化导板辅助功能,增加双头焊垫辊改造及提升外控辊约束力等措施提升成型器的工艺能力。实施效果表明,该改进方案能够减少超压量,增强三辊弯板效率,消除内焊缝根部应力裂纹,提升了超大直径、超大径厚比螺旋钢管生产中成型器的工艺能力和产品质量水平。
In order to improve unstable forming quality of existing spiral submerged arc welded pipe（SSAW） mill, working principles and forming difficulties of outside up type former were analyzed, and process capability of former was promoted by optimizing and adjusting K value, intensifying auxiliary functions of guide, strengthening double-end bonding pad roll reform and improving binding force of external control roll. The implementation effects showed that the improved scheme could reduce overpressure amount, increase efficiency of three-roll bending plate, eliminate stress crack of root of inside weld and upgrade process capability and quality level of former in production of super large diameter and super large diameter-thick ratio spirally steel pipe.
出处
《焊管》
2018年第1期51-55,共5页
Welded Pipe and Tube
关键词
螺旋埋弧焊管
成型器
成型工艺
径厚比
K值
超压量
SSAW
former
forming process
diameter-thick ratio
K value
overpressure amount
