复杂伞状柱节点的制作及焊接工艺

Fabrication and welding technology of complex umbrella column joints

北京地铁7号线东延工程环球影城站整个屋面以箱体为主体结构,其中由圆管转换箱体的伞状柱节点作为整个屋面结构的核心支撑构件,其焊接质量和加工尺寸精度显得尤为重要。从加工制作角度对伞状柱节点制作重点、难点进行深层次分析,预防层状撕裂裂纹的产生,装焊顺序偏向于尺寸控制,保证了伞状柱节点制作的可操作性以及结构的可靠性。为后续的伞状柱节点的加工工艺提供一定借鉴和参考价值。

The entire roof of the universal studios station of the East extension project of Beijing metro line 7 is based on the main structure of the box,the umbrella column joints of the circular tube conversion box is used as the core supporting member of the entire roof structure.Its welding quality and machining dimensional accuracy are particularly important.From the perspective of processing and production,the key points and difficulties of the umbrella column joints are deeply analyzed,the interpass tearing cracks and welding sequence tending toward dimensional control are prevented,the operability of the umbrella column joints and the reliability of the structure are ensured.This provides some reference for futrure processing of the umbrella column joints.