| 摘要 |
PURPOSE:To provide the welding of high quality at low cost by achieving the roll pressing of a sheet part in the prescribed range from the boundary of the weld zone parallel to the weld zone in a butt welded joint to prevent the deformation in the longitudinal direction of the member to be welded. CONSTITUTION:In the butt welding of aluminum sheet and aluminum alloy sheet 1, the aluminum alloy sheet 1 in the range 3 of 30mm from the boundary of the weld zone 2 is pressed by rolls 4, 5 parallel to the weld zone. The width of the pressing is preferably and normally 5-30mm, and the degree of the pressing is preferably and normally the rolling reduction of about 1% of the sheet thickness. The trend of shrinkage in the direction parallel to the weld zone 2 is weakened by the pressing of the rolls 4, 5 in the vicinity of the weld zone 2, and the residual compressive stress is also reduced to allow the correction of the buckled deformation. This constitution prevents the deformation in the longitudinal direction of the member to be welded of the aluminum alloy sheet 1 to obtain the welding of high quality. |
