我单位承揽鹤煤集团公司电厂2×135 kW 锅炉钢结构构件当中的许多箱型梁,如 HK 1000×10×20×450/350,长度为14910mm,要求出现旁弯不超过6 mm,上拱不超过10mm,下挠不超过5mm,我公司第1次制造如此长且批量大的梁,在工期紧急的情况下,控制焊接变形,减少焊后火焰较正的工作量,从而提高工作效率就显得尤为重要。因此在认真分析该批箱型梁的特点后,制定了如下的组装焊接顺序来控制焊接变形量(见图1)。 I unit contract Hexi Coal Group Company 2 × 135 kW boiler steel structure of many of the box girders, such as HK 1000 × 10 × 20 × 450/350, the length of 14910mm, the required side bends not exceeding 6 mm, the arch Not more than 10mm, under the deflection of not more than 5mm, the first time I make such a large and large quantities of the beam, in the case of emergency, the control of welding deformation, reduce post-welding flame more work, so as to improve work efficiency It is particularly important. Therefore, careful analysis of the characteristics of the box beam, developed the following assembly welding sequence to control the welding deformation (see Figure 1).