直缝埋弧焊钢管预焊技术

Tack Welding Technology in Longitudinal Seam Submerged-arc Welded Pipe

简述了国内外直缝埋弧焊生产机组预焊工艺的技术现状,介绍了预焊工艺和预焊设备。分析了预焊中常见问题如错边、烧穿、气孔、飞溅等产生的原因,并提出了相应的改进措施。

The paper analysis the requirement of tack welding qualities and introduces the tack welding process & equipment.Today the high speed welding technology of large-sized wire MAG is used.Laser tracking system is used for weld seam tracking and offset of plate edges detect.This equipment includes mechanical system,hydraulic system,electric control system and welding system.The mechanical system consists of inlet & output roller conveyor,feed drive equipment,pipe guide cage.At last this article describes the influences of offset of plate edges,burn-off,porosity,splash and analysis how it's caused in production of the tack welding.