| 摘要 |
PURPOSE:To perform the padding edge preparation of the butted joint part of a tube in a few processes and at a low cost with high accuracy, and to perform the sound welding of a peripheral joint free from a defect caused by a high energy beam. CONSTITUTION:When welding the peripheral joint of the tubes 1a and 1b by a high energy beam, first of all, a flange type padding groove 11 is formed by heating and compressing a butted joint part in a welding atmosphere, and then a high energy beam welding is performed to the groove 11. |
