JCOE直缝埋弧焊钢管直边控制措施

Control Measures for Straight-edge Defect of JCOE SAWL Steel Pipe

简要介绍JCOE直缝埋弧焊钢管直边及其测量方法,分析造成钢管直边的原因,并给出减轻钢管直边缺欠的措施:上料控制翘曲变形,成型岗位结合钢板强度信息调整压下量;优化成型参数,合理使用扩径模具控制成型后未完全弯折部分的长度;定时更换扩径机已磨损的铜滑块.采用控制措施后可将多种规格钢管的管端直边控制在0.7 mm以内.

Briefed here in the paper are the straight-edge defect of the JCOE SAWL pipe and the measurement method for such defect.The causes for such defect are analyzed.Accordingly relevant countermeasures are proposed,including controlling warpage deformation,setting the reduction by the pipe-forming station operator based on the information about the steel plate strength,optimizing the pipe-forming parameter,properly using the expanding die to control the length of the section that is not fully bent,and periodically changing the worn copper sliding block of the expanding mill,etc.Thanks to the above mentioned countermeasures,the pipe-end straight-edges of pipes with different sizes can be properly limited under 0.7 mm.