| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce warping of a welded object with respect to the axis of rotation caused by the difference in thermal expansion at the time of welding to reduce the remaining internal stress in the welded part. SOLUTION: The present invention relates to an end plug welding device for a nuclear fuel rod or the like for welding a tube 1 for the fuel rod or a water rod and an end plug 3 mounted on an end of the tube 1, while rotating the tube 1 and the plug 3. Plural welding heat sources 10a, 10b are arranged symmetrically with respect to an axis of rotation in welding of the tube 1. A part for the tube 1 and the plug 3 is welded with the plural heat sources 10a, 10b.</p> |
