| 摘要 |
PURPOSE:To prevent overheating parts and to perform satisfactory welding in butt welding of thin sheets in the finite inside radial corner parts smaller than the thickness of the welding section by pressing a backing metal consisting of a steel plate to the welded angle parts near the outside thereof and welding the sheets thereby making shielding gas effective. CONSTITUTION:A backing strip 5 consisting of a steel plate is pressed to the finite inside radial sharp angled parts 2 smaller than the thickness of welding section and is welded 4 in butt welding of sheets 1 having said angle parts. The strip 5 blocks the flow direction of the shielding gas in the parts 2 to make the gas effective. Overheating of the parts 2 is prevented by heat absorption of the strip 5, by which the satisfactory welding of the angle parts is accomplished. |
