| 摘要 |
PROBLEM TO BE SOLVED: To suppress deformation due to welding heat to a minimum when welding many members to be welded to a large sized structure.SOLUTION: An automatic welding method includes a first step in which many members 2 to be welded are fixed temporarily at prescribed positions of a structure 10 respectively, a second step in which a first pass welding is performed to the temporarily-fixed members 2 to be welded in a prescribed welding order, a third step in which the deformation amount of the structure 10 is measured, a fourth step in which the welding order of the next pass welding is decided temporarily based on the measured deformation amount and the deformation amount of the structure 10 in a case of performing the next pass welding in the welding order is estimated, a fifth step in which the next pass welding is performed in the temporarily decided welding order when the estimated deformation is within the allowable range, a sixth step in which, back to the fourth step, the welding order is decided temporarily again when the estimated deformation is out of the allowable range, and a seventh step in which it is determined whether the next pass welding is the final pass welding or not after finishing the next pass welding, and the third to the sixth steps are repeated again in a case of being not the final pass and the welding is over in a case of being the final pass. |
