| 摘要 |
PURPOSE:To obtain a weld zone of a good quality and to extend the service life of a pressure fitting roller by forming by the press-fitting roller the inner face of the following weld zone after shaving the welding bead by a shoe. CONSTITUTION:After pressure welding both edge parts 13 heated by an open pipe 12 by a squeezing roll 14 the welding bead 3 formed on the inner face of the weld zone is shaved by a shoe 21. The inner face of the weld zone of after the welding bead 3 being shaved is made smooth with a rolling reduction at a light load by a pressure fitting roller 17. As a result, the rolling amt. by the pressure fitting roller 17 can be reduced and its service life can be extended. |
