长输管线停输连头作业中常常会制作来回弯,受线路角度、弯头质量和下料人员经验等因素影响,来回弯的下料精确度不易保证,进而对焊接质量造成影响。本文从来回弯的本质下料方法入手,探讨下料过程中易忽略的关键环节,总结下料方法。 Long-distance pipelines often lose their connection and return to work. Due to the influence of the line angle, the quality of the elbow and the experience of the unloading personnel, the accuracy of the unloader can not be guaranteed and the welding quality is affected. This article starts from the nature of bending back and forth to start with the material to explore the process of unloading easily overlooked the key to summarize the feeding method.