大型变截面钢箱梁焊接问题及处理措施

Welding problems and their treatment measures of Super-huge cantilevered steel box beam

大型变截面钢箱梁是现代港口码头起重运输机械的关键金属结构件。它要求具有良好的承载能力和较大的抗弯刚度。由于构件尺寸长,焊缝种类多,焊接难度大,在制造过程中出现了较多的焊接质量问题,对此采用了相应的工艺措施,特别是通过焊接规范和焊接程序的调整,有效地防止了焊接变形和焊接应力。

Super-huge cantilever type variable sectional steel box beam is the key assemble pieces of hoisting and conveying machinery in modern port and quay.It has not only good bearing capacity,but also greater bending rigidity.Many problems appeared during the fabrication because of its long component,various joint type and great welding difficulty.therefore the corresponding measures were adopted.The welding deformation and the welding stress were effectively prevented through the control of the welding specifications and sequence.